Sound proof box for an engine-driven work machine

Abstract

A cooling air introduction path is formed in a base of a sound proof case of an engine-driven work machine. The base is divided into upper and lower portions, and a space in the upper portion is divided by a separation wall and arranged below an air discharging chamber. The upper part of one space is covered with a arranging plate, a partition wall is erected on the arranging plate, and a cooling air introduction port is provided between the partition wall and the separation wall to provide an engine chamber and one space are communicated, a hole is provided in the plate below the chamber, and one space and the space in the lower portion are communicated and located below the chamber. A cooling air intake port is provided on lateral walls of the lower portion to communicate the space inside the lower portion with the outside of the machine.

Claims

1. A sound proof box for an engine-driven work machine comprising a base arranging an engine and a work machine main body driven by the engine and an upper portion of which is opened, and a sound proof case for covering the upper side of the base, and a space in the sound proof case being separated into two chambers by a vertically erected partition wall to make one chamber as an engine chamber storing the engine and the work machine main body and to make the other chamber as an air discharging chamber introducing the cooling air from the engine chamber through a communication port provided on the partition wall and discharging to outside of the machine through an air discharging port, an upper opening of the base being covered with a component arranging plate at a position at which to place the air discharging chamber, to form a bottom surface of the air discharging chamber by the component arranging plate, an inside of the base being separated into an upper stage and a lower stage by a floor plate at a predetermined position in the height direction to make a side of the upper stage of the base which includes the floor plate as an upper stage portion and make a part lower than the floor plate of the base as a lower stage portion, a separation wall to divide a space in the upper stage portion in the longitudinal direction being provided at a position below the engine chamber to make the space in the upper stage portion which is a space closer to the air discharging chamber than the separation wall as one space, a cooling air introduction port which communicates the engine chamber with the one space being provided between the partition wall and the separation wall, a through hole which communicates the one space with a space in the lower stage portion being provided at a bottom portion of the one space at a position below the air discharging chamber, and a cooling air intake port which communicates the space in the lower stage portion with the outside of the machine being provided on a lateral wall of the lower stage portion.

2. The sound proof box for an engine-driven work machine according to claim 1 wherein each of the upper stage portion and the lower stage portion is formed as a discrete member, and that the base is formed by arranging the upper stage portion on the lower stage portion.

3. The sound proof box for an engine-driven work machine according to claim 1 wherein the air intake port which is also used as a fork insertion port of a forklift is provided on the lateral wall of the lower stage portion which is the longitudinal lateral wall thereof.

4. The sound proof box for an engine-driven work machine according to claim 2 wherein the air intake port which is also used as a fork insertion port of a forklift is provided on the lateral wall of the lower stage portion which is the longitudinal lateral wall thereof.

5. The sound proof box for an engine-driven work machine according to claim 1 wherein the introduction port is covered with a mesh-like cover.

6. The sound proof box for an engine-driven work machine according to claim 2 wherein the introduction port is covered with a mesh-like cover.

7. The sound proof box for an engine-driven work machine according to claim 3 wherein the introduction port is covered with a mesh-like cover.

8. The sound proof box for an engine-driven work machine according to claim 1 wherein a space in the upper stage portion divided by the separation wall which is the other space therein is formed as a liquid-tight chamber to make an oil reservoir for reserving leaked oil.

9. The sound proof box for an engine-driven work machine according to claim 2 wherein a space in the upper stage portion divided by the separation wall which is the other space therein is formed as a liquid-tight chamber to make an oil reservoir for reserving leaked oil.

10. The sound proof box for an engine-driven work machine according to claim 3 wherein a space in the upper stage portion divided by the separation wall which is the other space therein is formed as a liquid-tight chamber to make an oil reservoir for reserving leaked oil.

11. The sound proof box for an engine-driven work machine according to claim 4 wherein a space in the upper stage portion divided by the separation wall which is the other space therein is formed as a liquid-tight chamber to make an oil reservoir for reserving leaked oil.

12. The sound proof box for an engine-driven work machine according to claim 5 wherein a space in the upper stage portion divided by the separation wall which is the other space therein is formed as a liquid-tight chamber to make an oil reservoir for reserving leaked oil.

13. The sound proof box for an engine-driven work machine according to claim 1 wherein an inspection port is provided in the part of the lateral wall of a base in which the one space is formed, and that a cover for covering the inspection port is provided.

14. The sound proof box for an engine-driven work machine according to claim 2 wherein an inspection port is provided in the part of the lateral wall of a base in which the one space is formed, and that a cover for covering the inspection port is provided.

15. The sound proof box for an engine-driven work machine according to claim 3 wherein an inspection port is provided in the part of the lateral wall of a base in which the one space is formed, and that a cover for covering the inspection port is provided.

16. The sound proof box for an engine-driven work machine according to claim 5 wherein an inspection port is provided in the part of the lateral wall of a base in which the one space is formed, and that a cover for covering the inspection port is provided.

17. The sound proof box for an engine-driven work machine according to claim 8 wherein an inspection port is provided in the part of the lateral wall of a base in which the one space is formed, and that a cover for covering the inspection port is provided.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The objects and advantages of the invention will become understood from the following detailed description of preferred embodiments thereof in connection with the accompanying drawings in which like numerals designate like elements, and in which:

(2) FIG. 1 is a perspective view from the front side obtained by viewing an engine-driven work machine equipped with a sound proof box as one embodiment of the present invention;

(3) FIG. 2 is a perspective view from the rear side obtained by viewing an engine-driven work machine equipped with a sound proof box as one embodiment of the present invention;

(4) FIG. 3 is an exploded view from the rear side obtained by viewing the base of a sound proof box as one embodiment of the present invention;

(5) FIG. 4A is a perspective view from the front side obtained by viewing a separation wall 24 and a frame body 17 from the rear side;

(6) FIG. 4B is a perspective view from the front side obtained by viewing a separation wall 24 and a frame body 17 from the front side;

(7) FIG. 4C is a perspective view from the front side obtained by viewing a separation wall 24 and a frame body 17 together with a component arranging plate 14 and a partition wall 12;

(8) FIG. 5 is an exploded view from the rear side obtained by viewing the base of a sound proof box as another embodiment of the present invention;

(9) FIG. 6 is a side perspective view of an engine-driven work machine equipped with a sound proof box as one embodiment of the present invention;

(10) FIG. 7 is a perspective view of a conventional sound proof box for an engine-driven work machine which is provided with an air intake port on the lateral wall of a sound proof case;

(11) FIG. 8A is a side view of a conventional sound proof box for an engine-driven work machine which is provided with an air intake port on the lateral wall of a sound proof case;

(12) FIG. 8B is an enlarged B-B line cross-sectional view of FIG. 8A; and

(13) FIG. 9 is an exploded view of the base part of a conventional sound proof box of an engine-driven work machine wherein a cooling air introduction flow path is formed in the base (corresponding to FIG. 3 of the '219704).

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

(14) The sound proof box for an engine-driven work machine of the present invention is described below with reference to the accompanying drawings.

(15) The reference numeral 1 in FIGS. 1 and 2 indicates an engine-driven work machine equipped with the sound proof box 10 of the present invention.

(16) This engine-driven work machine 1 is one packaged in the sound proof box 10 by housing the constituent equipment of the engine-driven work machine 1, such as an engine 51, a work machine main body (in the example shown in the figure, the main body of a compressor) 52 and a receiver tank 53, and is thereby configured to be capable of preventing leakage of noise generated in the sound proof box 10 and facilitating the transportation and installation.

(17) The aforementioned sound proof box 10 which houses the constituent equipment of the engine-driven work machine 1 is composed of a plan-view rectangular base 20 on which to arrange the aforementioned engine 51, the work machine main body 52, and other constituent equipment, and a sound proof case 30 that covers the base 20 in the state where the constituent equipment is arranged thereon.

(18) A sound proof case 30 among them is a box-shaped case consisting of a front panel 31, a rear panel 32, a side panel 33, and a top panel 34, and by arranging the sound proof case 30 on the base 20, a housing space to house the constituent equipment arranged on the base 20 is formed in the sound proof case 30.

(19) In the sound proof case 30 shown in FIGS. 1 and 2, the rear panel 32, a part of the side panel 33 on the front side of the drawing, and the top panel 34 are in the state of being removed, and in the state where these members are arranged, the entire case is formed in the shape of a rectangular box, as shown by the dashed lines in FIGS. 1 and 2.

(20) The space inside this sound proof case 30 is divided into two chambers back and forth in the longitudinal direction of a sound proof box 10 by a partition wall 12 vertically erected from the upper face of a base 20 in order to form an engine chamber 30a where the engine 51, the work machine main body 52 and so forth are housed on the side toward a front panel 31, and an air discharging chamber 30b which communicates with the outside of the machine through an air discharging port 35 on the side toward a rear panel 32.

(21) The above-mentioned engine chamber 30a and air discharging chamber 30b communicates with each other through a communication port 13 (see FIGS. 3 and 5) provided in the central part of the partition wall 12, and the air discharging chamber 30b communicates with the outside of the machine through an air discharging port 35 provided in the top cover 34 as shown in FIGS. 1 and 2.

(22) The above-mentioned base 20 on which to arrange the engine 51, the work machine main body 52 and other constituent equipment of the engine-driven work machine 1 is formed in a plan-view rectangular shape formed by being bounded on four sides by a pair of longitudinal lateral walls 211, 212 and a pair of widthwise lateral walls 213, 214, and the space inside the base 20 which is formed by being enclosed by these lateral walls 211-214 is divided by a floor plate 22 into upper and lower two stages at a given position in the height direction.

(23) As for the base 20 divided into upper and lower stages by the floor plate 22, the present specification describes the upper stage side including the floor plate 22 as the upper stage portion 20a, and the part below the floor plate 22 as the lower stage portion 20b.

(24) Therefore, as shown in FIGS. 1 and 2, one longitudinal lateral wall 211 of a base 20 has its upper portion side forming one longitudinal lateral wall 211a of an upper stage portion 20a, and has its lower portion side forming one longitudinal lateral wall 211b of a lower stage portion 20b (see FIG. 2), the other longitudinal lateral wall 212 of the base 20 has its upper portion side forming the other longitudinal lateral wall 212a of the upper stage portion 20a, and has its lower portion side forming the other longitudinal lateral wall 212b of the lower stage portion 20b (see FIG. 1),

(25) one widthwise lateral wall 213 of the base 20 has its upper portion side forming one widthwise lateral wall 213a of the upper stage portion 20a, and has its lower portion side forming one widthwise lateral wall 213b of the lower stage portion 20b (see FIG. 2), and

(26) the other widthwise lateral wall 214 of the base 20 has its upper portion side forming the other widthwise lateral wall 214a of the upper stage portion 20a, and has its lower portion side forming the other widthwise lateral wall 214b of the lower stage portion 20b (see FIG. 1).

(27) This embodiment is configured so that as shown in FIGS. 3 and 5, the parts of the upper stage portion 20a except for the widthwise lateral walls 213a, 214a and the lower stage portion 20b of the frame type formed by combining four molding members are each formed as separate members, that the longitudinal end edge part of the floor plate 22 of the upper stage portion 20a is arranged on the longitudinal lateral walls 211b and 212b of the lower stage portion 20b, and that the base 20 can be formed by fixing both of the members together by bolting, welding, or other methods.

(28) As shown in FIGS. 3 and 5, this embodiment is configured that the longitudinal lateral walls 211a, 212a of the upper stage portion 20a and the longitudinal lateral walls 211b, 212b of the lower stage portion 20b are each composed of different members, and that when the upper stage portion 20a is arranged on the lower stage portion 20b, one longitudinal lateral wall 211a of the upper stage portion 20a and one longitudinal lateral wall 211b of the lower stage portion 20b form one longitudinal lateral wall 211 of the base 20, and the other longitudinal lateral wall 212a of the upper stage portion 20a and the other longitudinal lateral wall 212b of the lower stage portion 20b form the other longitudinal lateral wall 212 of the base 20.

(29) On the other hand, each of the widthwise lateral walls 213 and 214 of a base 20 is formed by one mold plate, and is configured so that the mold plate (a lateral wall 213 or 214) is attached to the part of a lower stage portion 20b in the state before the base 20 is assembled.

(30) Further, a configuration in which when the part of an upper stage portion 20 except for widthwise lateral walls 213a and 214a is arranged on a lower stage portion 20b, the lower parts of these mold plates (widthwise lateral walls 213 and 214) form the widthwise lateral walls 213b and 214b of the lower stage portion 20b and the upper parts thereof form widthwise lateral walls 213a and 214a of the upper stage portion 20a has been made.

(31) However, the configurations of lateral walls 211-214 of a base 20 are not limited to the configurations shown in FIGS. 3 and 5, and longitudinal lateral walls 211 and 212 as well as widthwise lateral walls 213 and 214 may also be formed of one mold plate, and furthermore, the widthwise lateral walls 213 and 214 may also be formed by combining the widthwise lateral walls 213a, 214a of the upper stage portion 20a and the widthwise lateral walls 213b, 214b of the lower stage portion 20b which are formed as separate members in the same way as the longitudinal lateral walls 211 and 212.

(32) As shown in FIGS. 1-3 and 5, the space 23 formed in the upper stage portion 20a is divided into two sections back and forth in the longitudinal direction by a separation wall 24 erected on a floor plate 22 at the position below an engine chamber 30a, and one space 23a which is present on the side of an air discharging chamber 30b with respect to this separation wall 24 and is the upper portion of a part corresponding to the position at which to form the air discharging chamber 30b is covered with a component arranging plate 14, and this component arranging plate 14 is used as the bottom surface of the air discharging chamber 30b.

(33) Further, the aforementioned partition wall 12 which separates the inside of a sound proof case 30 into an engine chamber 30a and an air discharging chamber 30b is erected on the side of the end edge 14a of the side of the engine chamber 30a of that component arranging plate 14.

(34) Between the lower end of the partition plate 12 (the end edge 14a on the side of the engine chamber 30a of the component arranging plate 14) and the upper end of the separation wall 24, the upper portion of one space of an upper stage portion 20a is opened by a cooling air introduction port 15, and the engine chamber 30a and one space 23a in the upper stage portion 20a communicates with each other through this introduction port 15.

(35) In the embodiment shown in FIG. 3, as shown in FIGS. 4A to 4C, a separation wall 24 is formed by one vertical piece of an L-shaped cross-sectional angle plate, and an introduction port 15 is formed in the other piece of the angle plate extending from the upper end of the separation wall 24 toward the lower end of a partition plate 12 (the end edge 14a on the engine chamber 30a side of a component arranging plate 14), and thereby, the other piece of the angle plate is made to be a frame body 17 to which to attach the mesh-like cover 16 to be described later.

(36) In the configuration described with reference to FIGS. 3 and 4, the aforementioned frame body 17 is explained as being integrally formed with a separation wall 24 and provided so as to protrude from the upper end of the separation wall 24 toward the end edge 14a on the engine chamber 30a side of a component arranging plate 14, however, although the illustration is omitted, the frame body 17 may be, on the contrary to this, integrally formed with the component arranging plate 14 and provided so as to protrude from the end edge 14a on the engine chamber 30a side of the component arranging plate 14 toward the upper end of the separation wall 24.

(37) Additionally, the aforementioned frame body 17 does not necessarily need to be provided, and as shown in FIG. 5, the part between the lower end of the partition plate 12 (the end edge 14a on the side of the engine chamber 30a of the component arranging plate 14) and the upper end of the separation wall 24 may be left open without any attachment so that the entire of this part is used as the aforementioned introduction port 15.

(38) It is preferable to attach a mesh cover 16 to this introduction port 15 as shown in FIG. 1 and FIG. 2 so that even in the case where a foreign matter such as litter is sucked in through a cooling air introduction flow path, it cannot reach an engine chamber 30a.

(39) In the part of the aforementioned floor plate 22 provided in an upper stage portion 20a which forms the bottom surface of the one space 23a, a through hole 25 penetrating through the floor plate 22 is formed, as shown in FIG. 3, below the position at which to form an air discharging chamber 30b, and one space 23a of the upper stage portion 20a and the space in a lower stage portion 20b communicate with each other through that through hole 25.

(40) It is preferable that this through hole 25 is provided as far away as possible from an introduction port 15 as shown in FIGS. 1 to 3, for example, at a position close to one widthwise lateral wall 213a of an upper stage portion 20a.

(41) Although the embodiments shown in FIGS. 1 to 3 show a configuration of covering the entire bottom portion of an upper stage portion 20a with the floor plate 22, and forming the aforementioned through hole 25 through the floor plate 22 of the bottom surface part of one space 23a of the upper stage portion 20a, a configuration of making the entire bottom portion of one space 23a as a through hole 25 without providing a floor plate 22 in the part where the one space 23a of the upper stage portion 20a is formed as shown in FIG. 5 may be adopted instead of that configuration.

(42) The other space 23b of the space 23 in the upper stage portion 20a separated by the separation wall 24 is formed liquid-tight to be used as an oil reservoir in this embodiment, and such a configuration that the constituent equipment of the engine-driven work machine 1 such as the engine 51 and the work machine main body 52 can be arranged on the arranging table 26 provided in the oil reservoir 23b is made, and at the same time, fuel and lubricating oil leaked from the engine 51 and the work machine main body 52 are reserved in the oil reservoir 23b to prevent them from leaking outside the machine.

(43) In FIG. 2, the reference numeral of 28 refers to an inspection port provided on one widthwise lateral wall 213 of the base 20, and this inspection port 28 is blocked with a cover 29 when an engine-driven work machine 1 is in operation, and on the other hand, the cover 29 is removed at the time of inspection and thereby dusts accumulated in one space 23a of an upper stage portion 20a, foreign matters sucked into the portion, or the like can be removed through the inspection port 28.

(44) In the example shown in the figure, a configuration in which the inspection port 28 is provided on one widthwise lateral wall 213 of a base 20 is shown, however the inspection port 28 may also be provided on the part where one space 23a is formed among the longitudinal lateral walls 211 and 212 of the base 20.

(45) Additionally, this inspection port 28 and the cover 29 are not essential components in the sound proof box 10 of the present invention and need not be necessarily provided.

(46) In any part of the lateral wall of a lower stage portion 20b, preferably the part of the lateral wall of the lower stage portion 20b which is located below an engine chamber 30a, a cooling air intake port 27 is formed.

(47) In the illustrated embodiment, these air intake ports 27 are provided at six locations, that is, two locations on each of the longitudinal lateral walls 211b and 212b of a lower stage portion 20b and two locations on the other widthwise lateral wall 214b, however the positions at which to form the air intake ports 27 are not limited to the illustrated examples and these can be provided at any position on the lateral walls of the lower stage portion 20b.

(48) In the illustrated embodiment, the air intake ports 27 provided on the longitudinal lateral walls 211b and 212b of a lower stage portion 20b are formed in accordance with the width of the forks of a forklift so that the air intake ports 27 can be also used as fork insertion ports of a forklift.

(49) By adopting such a configuration, in the case of obtaining, the base 20 of the sound proof box 10 of the present invention by modifying the structure of an already existing base equipped with the fork insertion port, no new air intake port 27 needs to be provided, so that the workloads required during the manufacturing can be reduced.

(50) The sound proof box 10 configured as described above is configured so that on the side of the air discharging chamber 30b, a heat exchanger 54 such as a radiator of an engine 51 is placed facing a communication port (not illustrated) provided on a partition wall 12 as shown in FIG. 2 while on the side of the engine chamber 30a, a blower 55 having cooling fans (not illustrated) internally is placed through a communication port (not illustrated) toward the aforementioned heat exchanger 54, that once cooling air is generated by operating the blower 55, the air in the engine chamber 30a passes through the heat exchanger 54 through a communication port 13 for heat exchange and is thereafter introduced into the air discharging chamber 30b, and that the cooling air introduced into the air discharging chamber 30b is discharged outside the machine through an air discharging port 35.

(51) In this way, when the air in the engine chamber 30a is sent into the side of the air discharging chamber 30b by the operation of the blower 55, the inside of the engine chamber 30a takes on negative pressure.

(52) As a result, as shown by the arrows in FIG. 3 and FIG. 6, the outside air introduced from the air intake ports 27 provided on the lateral walls 211b, 212b, and 214b of the lower stage portion 20b of a base 20 passes through the space inside the lower stage portion 20b of the base 20, reaches the inside of one space 23a of the upper stage portion 20a through a through hole 25, and is introduced into the engine chamber 30a through the cooling air introduction port 15 provided on the component arranging plate 14.

(53) In other words, a cooling air introduction flow path going from the air intake port 27 to the introduction port 15 is formed in the base 20.

(54) The cooling air introduction flow path formed in this base 20 can introduce cooling air in an amount necessary and sufficient for cooling a heat exchanger 54, and as a result, unlike a conventional sound proof box 310 explained with reference to FIG. 7 and FIG. 8, the sound proof box 10 of the present invention does not necessarily need to be provided with an air intake port 327 on the lateral wall of a sound proof case 330, and even in the case of providing an air intake port 327 on the lateral wall of a sound proof case, the air intake ports 327 can be reduced in size and number, and therefore, it is not necessary any more to provide a duct 360 inside the position at which to form the air intake port 327, or by allowing the ducts 360 provided inside the position at which to form the air intake port 327 to be reduced in size and number, the sound proof case is allowed to be reduced in size, and further the entire of an engine-driven work machine is allowed to be reduced in size.

(55) In addition, the aforementioned cooling air introduction flow path formed in the base 20 precludes the noise generated in the sound proof case 30 from directly leaking outside the machine through an air intake port 27, by being formed in a manner of meandering through the inside of the base 20, and the sound insulation of the sound proof box 10 cannot be compromised by the formation of the cooling air introduction path.

(56) Moreover, the cooling air flowing through this introduction path is configured to move from the lower side to the upper side while meandering, and thereby, even if rainwater passes through the air intake port 27 by being carried by the cooling air, the rainwater is separated from the cooling air before it reaches the introduction port 15 to fall downward to be removed, and thereby even to prevent rainwater from entering the engine chamber 30a.

(57) Furthermore, since the above configuration allows a cooling air introduction path to be formed without carrying out hole drilling process or the like on the upper stage portion 20a of the base 20 which is the part where to form an oil reservoir 23b, the other space (oil reservoir) 23b with liquid tightness can be easily obtained, for example, by separating the inside of the oil reservoir of an already existing base provided with a function of an oil weir by the separation wall 24 to form the other space (oil reservoir) 23b.

(58) Furthermore, since the configuration in which an inspection port 28 is provided on one widthwise lateral wall of the upper stage portion 20a as described above allows the inside of a cooling air introduction flow path to be easily accessed by simply removing a cover 29, excellence in maintainability is realized in a matter and so on that dust and a foreign matter can be easily removed, even in the case where problems such as dusts accumulating or foreign matters sucked in being clogged in the cooling air introduction flow path occur.

(59) In the configuration shown in FIGS. 1 to 6, the separation wall 24 which divides the space 23 in the upper stage portion 20a of the base 20 is provided at a position relatively close to a partition wall 12, and when an introduction port 15 is provided on the component arranging plate 14 between the lower end of the partition wall 12 and the upper end of the separation wall 24, the introduction port 15 necessarily opens near the blower 55.

(60) In this configuration, the cooling air introduced into the engine chamber 30a can be introduced into the heat exchanger 54 in a cold state before being warmed up in the engine chamber 30a, thus improving the cooling performance of the engine 51.

(61) However, the configuration of the sound proof box 10 of the present invention is not limited thereto, and the aforementioned separation wall 24 may be provided by moving it toward the inner part of an engine chamber 30a to a position farther than a partition wall 12, for example, a position below the constituent equipment placed in the engine chamber 30a which is equipment that needs to be cooled.

(62) By making such a configuration, it is made possible to open the introduction port 15 below the equipment that is considered to need to be cooled, and therefore, cooling air can be introduced into an engine chamber 30a below the constituent equipment that needs to be cooled, instead of introducing cooling air near a blower 55, or together with introducing cooling air near the blower 55, to allow this equipment to be cooled.

(63) Thus the broadest claims that follow are not directed to a machine that is configure in a specific way. Instead, said broadest claims are intended to protect the heart or essence of this breakthrough invention. This invention is clearly new and useful. Moreover, it was not obvious to those of ordinary skill in the art at the time it was made, in view of the prior art when considered as a whole.

(64) Moreover, in view of the revolutionary nature of this invention, it is clearly a pioneering invention. As such, the claims that follow are entitled to very broad interpretation so as to protect the heart of this invention, as a matter of law.

(65) It will thus be seen that the objects set forth above, and those made apparent from the foregoing description, are efficiently attained and since certain changes may be made in the above construction without departing from the scope of the invention, it is intended that all matters contained in the foregoing description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

(66) It is also to be understood that the following claims are intended to cover all of the generic and specific features of the invention herein described, and all statements of the scope of the invention which, as a matter of language, might be said to fall therebetween.

(67) Now that the invention has been described;

EXPLANATION OF REFERENCE NUMERALS

(68) 1 Engine-driven work machine 10 Sound proof box 12 Partition wall 13 Communication port 14 Component arranging plate 14a End edge on the side of engine chamber (of component arranging plate) 15 Introduction port (for cooling air) 16 Mesh-like cover 17 Frame body 20 Base 20a Upper stage portion (of base) 20b Lower stage portion (of base) 211 One longitudinal lateral wall (of base) 212 The other longitudinal lateral wall (of base) 213 One widthwise lateral wall (of base) 214 The other widthwise lateral wall (of base) 211a One longitudinal lateral wall (of upper stage portion of base) 212a One longitudinal lateral wall (of upper stage portion of base) 213a The other longitudinal lateral wall (of upper stage portion of base) 214a The other longitudinal lateral wall (of upper stage portion of base) 211b One widthwise lateral wall (for lower stage portion of base) 212b One widthwise lateral wall (for lower stage portion of base) 213b The other widthwise lateral wall (for lower stage portion of base) 214b The other widthwise lateral wall (for lower stage portion of base) 22 Floor plate 23 Space (in upper stage portion) 23a One space 23b The other space (oil reservoir) 24 Separation wall 25 Through hole 26 Arranging table 27 Air intake port 28 Inspection port 29 Cover 30 Sound proof case 30a Engine chamber 30b Air discharging chamber 31 Front panel 32 Rear panel 33 Side panel 34 Top panel 35 Air discharging port 51 Engine 52 Work machine main body (compressor main body) 53 Receiver tank 54 Heat exchanger 55 Blower 300 Engine-driven work machine 310 Sound proof box 312 Partition wall 320 Base 327 Air intake port 330 Sound proof case 330a Engine chamber 330b Air discharging chamber 334 Top panel 335 Air discharging port 351 Engine 352 Work machine main body (generator main body) 354 Heat exchanger 355 Cooling fan 360 Duct 470 Base 480 Bed 481 Sack-shaped flow paths 482, 483 Opening 490 Oil guard 491 Outer wall (of oil guard) in the longitudinal direction 492 Oil reservoir 493 Lateral wall (of fuel tank) 494 Duct 495 Air intake port 496 Partition plate 497 Space (of wheel upper portion)