DEBARKING MACHINE

Abstract

A debarking machine is provided with a plurality of rotors disposed in parallel, and a gap between the rotors is blocked by a comb-tooth shape partition plate. The debarking machine is further provided with a log accommodating body, rotors rotatively mounted inside the log accommodating body and provided with debarking plates, a comb-tooth shape partition plate base disposed at a space between the rotors, a comb-tooth shape partition plate detachably mounted on the comb-tooth shape partition plate base, and a fixer for fastening the comb-tooth shape partition plate to the comb-tooth shape partition plate base. The comb-tooth shape partition plate is composed of partition plate elements divided along the axial directions the rotors, and each partition plate element is detachable separately. Thus the comb-tooth shape partition plates can be rebuilt and replaced easily.

Claims

1. A debarking machine comprising: a log accommodating body; a plurality of rotors rotatively mounted inside the log accommodating body and provided with debarking plates; a comb-tooth shape partition plate base disposed at a mutual space between the plurality of rotors; a comb-tooth shape partition plate detachably mounted on the comb-tooth shape partition plate base; and a fixer for fastening the comb-tooth shape partition plate to the comb-tooth shape partition plate base, wherein, the comb-tooth shape partition plate is composed of a plurality of partition plate elements divided along the axial directions the rotors, and each of the plurality of partition plate elements is detachable separately.

2. The debarking machine as claimed in claim 1, wherein, the comb-tooth shape partition plate base is composed of a base main body and a comb-tooth shape backing plate mounted on the base main body, and the comb-tooth shape partition plate is detachably mounted on the comb-tooth shape backing plate.

3. The debarking machine as claimed in claim 2, wherein, the comb-tooth shape backing plate is smaller than the comb-tooth shape partition plate.

4. The debarking machine as claimed in claim 2, wherein, the fixer is a plurality of bolts, and a partial number of the bolts is screwed into a tooth part of comb of the comb-tooth shape partition plate and into a tooth part of comb of the comb-tooth shape backing plate.

5. The debarking machine as claimed in claim 1, wherein, the comb-tooth shape partition plate is provided with debarking assist blocks.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0036] FIG. 1 is a plan view of a debarking machine according to a first embodiment of the present invention; FIG. 2 is a sectional view as viewed from a line II-II of FIG. 1 according to the first embodiment of the present invention;

[0037] FIG. 3 is an exploded side view showing a structure of a comb-tooth shape partition plate base and a comb-tooth shape partition plate according to the first embodiment of the present invention;

[0038] FIG. 4 is a plan view of a partition plate element of the comb-tooth shape partition plate according to the first embodiment of the present invention;

[0039] FIG. 5 is a plan view according to the first embodiment of the present invention, showing a state that the partition plate element of the comb-tooth shape partition plate is mounted on the comb-tooth shape backing plate;

[0040] FIG. 6 are side views according to the first embodiment of the present invention, explaining the function and effect in comparison with those of the conventional structure, in which, FIG. 6 (a) is a side view according to the embodiment of the present invention, and FIG. 6 (b) is a side view according to a conventional art;

[0041] FIG. 7 is a plan view according to a second embodiment of the present invention, showing a state that a partition plate element of a comb-tooth shape partition plate is mounted on a comb-tooth shape backing plate;

[0042] FIG. 8 is a perspective view according to a third embodiment of the present invention, showing a state that a debarking enhancing block is mounted on a comb-tooth shape partition plate;

[0043] FIG. 9 is a plan view of a debarking machine according to a conventional art;

[0044] FIG. 10 is a sectional view of the conventional art, as viewed from a line X-X of FIG. 9;

[0045] FIG. 11 is a sectional view of the conventional art showing a structure of a comb-tooth shape partition plate base and a comb-tooth shape partition plate; and

[0046] FIG. 12 is a sectional view of the conventional art showing a structure of the comb-tooth shape partition plate base and the comb-tooth shape partition plate.

DESCRIPTION OF EMBODIMENTS

[0047] Now, a first embodiment of the present invention will be explained with reference to FIGS. 1 to 6. A concreate foundation 1 is provided, and a log accommodating body 3 is mounted on the concreate foundation 1. The log accommodating body 3 comprises a pair of side walls 5, 7, etc. Rotors 9, 11 are rotatively provided in parallel, respectively, inside the log accommodating body 3. The rotor 11 is disposed obliquely downward of the rotor 9.

[0048] The rotor 9 is in a cylindrical shape, and shafts 13, 15 are protrusively provided, respectively, at each end of the rotor 9. The rotor 9 is pivotally supported by bearings 17, 19, via the shafts 13, 15, respectively. A plurality of debarking plates 21 is mounted on the outer peripheral surface of the rotor 9, and at the top surface of each of the debarking plates 21, a plurality of edges 23 is provided. Each of the edges 23 has a function of peeling bark from the surface of logs.

[0049] The rotor 11 has substantially the same structure as that of the rotor 9, and shafts 25, 27 are protrusively provided, respectively, at each end of the rotor 11. The rotor 11 is pivotally supported by bearings 29, 31, via the shafts 25, 27, respectively. A plurality of debarking plates 33 is mounted on the outer peripheral surface of the rotor 11, and at the top surface of each of the debarking plates 33, a plurality of edges 35 is provided. Each of the edges 35 has a function of peeling bark from the surface of logs.

[0050] The rotors 9, 11 are rotated by an unillustrated driving motor and rotation transmission mechanism, in the directions shown by arrows A and B of FIG. 2, respectively.

[0051] A comb-tooth shape partition plate 37 is disposed between the side wall 5 and the rotor 9. A comb-tooth shape partition plate 39 is disposed between the rotor 9 and the rotor 11. Moreover, a comb-tooth shape partition plate 41 is disposed between the rotor 11 and the side wall 7.

[0052] The comb-tooth shape partition plate 37 is provided with a plurality of slits 43 at predetermined spacings, on the side of the rotor 9, and each of the debarking plates 21 of the rotor 9 passes through each of the slits 43. Moreover, with regard to the comb-tooth shape partition plate 39, a plurality of slits 45 is provided at predetermined spacings on the side of the rotor 9, and a plurality of slits 47 is provided at predetermined spacings on the side of the rotor 11. Each of the debarking plates 21 of the rotor 9 passes through each of the slits 45, and each of the debarking plates 33 of the rotor 11 passes through each of the slits 47, respectively. Moreover, the comb-tooth shape partition plate 41 is provided with a plurality of slits 49 at predetermined spacings, on the side of the rotor 11, and each of the debarking plates 33 of the rotor 11 passes through each of the slits 49.

[0053] The comb-tooth shape partition plate 37 is fastened to the side wall 5, and the comb-tooth shape partition plate 41 is fastened to the side wall 7. On the other hand, the comb-tooth shape partition plate 39 is detachably fastened to a comb-tooth shape partition plate base 51.

[0054] The comb-tooth shape partition plate 37 is composed of a plurality of (in the present embodiment, nine) partition plate elements 53, respectively divided along the axial directions of the rotor 9 and the rotor 11. Each of the partition plate elements 53 is detachably fastened by bolts 55.

[0055] Similarly, the comb-tooth shape partition plate 41 is also composed of a plurality of (in the present embodiment, nine) partition plate elements 57, respectively divided along the axial directions of the rotor 9 and the rotor 11. Each of the partition plate elements 57 is detachably fastened by bolts 59.

[0056] And similarly, the comb-tooth shape partition plate 39 is also composed of a plurality of (in the present embodiment, nine) partition plate elements 61, respectively divided along the axial directions of the rotor 9 and the rotor 11. FIG. 4 is a plan view of the partition plate element 61.

[0057] The comb-tooth shape partition plate base 51 is composed of a base main body 63 substantially in a U-shape, a comb-tooth shape backing plate 65 fastened to the upper end of the base main body 63, and a plurality of support ribs 68 attached between the base main body 63 and the comb-tooth shape backing plate 65.

[0058] As illustrated in FIG. 5, the comb-tooth shape backing plate 65 is provided with a plurality of slits 67 at predetermined spacings, on the side of the rotor 9, and with a plurality of slits 69 at predetermined spacings, on the side of the rotor 11. Each of the debarking plates 21 of the rotor 9 passes through each of the slits 67, and each of the debarking plates 33 of the rotor 11 passes through each of the slits 69, respectively. The spacings of the slits 67, 69 are the same, respectively, as the spacings of the slits 45, 47 of the comb-tooth shape partition plate 39, as described above. Moreover, the size of the comb-tooth shape backing plate 65 is smaller than the size of the comb-tooth shape partition plate 39.

[0059] Each of the partition plate elements 61 of the comb-tooth shape partition plate 39 is detachably fastened onto the comb-tooth shape backing plate 65 by a plurality of (in the present embodiment, ten) bolts 71. Each of the bolts 71 is screwed into the comb-tooth shape backing plate 65, respectively, via a washer 73, through a penetration hole formed in the partition plate element 61. A recessed part 75 is formed in the rim of the penetration hole, and a screwhead of the bolt 71 and the washer 73 are accommodated in the recessed part 75.

[0060] Now, function of the present embodiment will be described based on the above structure.

[0061] First, unillustrated logs are fed into the log accommodating body 3. The rotor 9 and the rotor 11 are rotated inside the log accommodating body 3. With the function of the edges 23 of the debarking plates 21 of the rotating rotor 9, and with the function of the edges 35 of the debarking plates 33 of the rotating rotor 11, and also with the abrasion of each of the logs, the bark of the fed logs is peeled.

[0062] The peeled bark drops downwardly from the rotor 9 and the rotor 11, via the slits 43 of the comb-tooth shape partition plate 37, the slits 45, 47 of the comb-tooth shape partition plate 39, and the slits 49 of the comb-tooth shape partition plate 41. The dropped bark is discharged. On the other hand, the debarked logs are taken out to an outlet of the log accommodating body 3, and transferred to another place by an unillustrated conveyor.

[0063] Next, the rebuilding and replacement works of the comb-tooth shape partition plate 39 will be explained.

[0064] For example, among the plurality of (in the present embodiment, nine) partition plate elements 61, the partition plate elements 61, for which the rebuilding is required, are partially detached. For that purpose, the ten-piece bolts 71 are loosened, and then, each of the partition plate elements 61 subject to be rebuilt is detached from the comb-tooth shape backing plate 65, and is taken out of the log accommodating body 3. Thereafter, the damaged or worn portions of each of the partition plate elements 61 are rebuilt by hardfacing or patching work. After finishing of the rebuilding, the rebuilt partition plate elements 61 are taken into the log accommodating body 3, and fastened to predetermined positions of the comb-tooth shape backing plate 65, respectively, by the ten-piece bolts 71 and the washers 73.

[0065] The replacement work of the partition plate element 61 is performed substantially in the same manner. The ten-piece bolts 71 are loosened, and then, the partition plate element 61 is detached from the comb-tooth shape backing plate 65, and is taken out of the log accommodating body 3. As a replacement, a new partition plate element 61 is taken into the log accommodating body 3, and fastened to a predetermined position of the comb-tooth shape backing plate 65, by the ten-piece bolts 71 and the washers 73.

[0066] The rebuilding and replacement works of the comb-tooth shape partition plate 37 and the comb-tooth shape partition plate 41 are also performed substantially in the same manner. With regard to the comb-tooth shape partition plate 37, each of the partition plate elements 53 is separately detached as required, and then, the rebuilding and replacement works are performed. With regard to the comb-tooth shape partition plate 41, each of the partition plate elements 57 is separately detached as required, and then, the rebuilding and replacement works are performed.

[0067] Next, the load applied to the bolt 71 will be explained. FIG. 6 illustrates the load applied to the bolt 71, in comparison with that of the conventional art. FIG. 6 (a) shows a state according to the present embodiment, and FIG. 6 (b) shows a state according to the conventional art.

[0068] According to the present embodiment, as illustrated in FIG. 6 (a), the comb-tooth shape backing plate 65 is provided, and a screw-engagement position of the bolt 71 is disposed more outwardly than that of the conventional art. Thus, an overhanging length (L.sub.1) is shorter than that of the conventional art. Accordingly, for example, where load is applied to the end of the comb-tooth shape partition plate 39, the moment applied to the bolt 71 is reduced.

[0069] On the other hand, according to the conventional art, an overhang length (L.sub.2) is longer. Therefore, for example, where load is applied to the end of the comb-tooth shape partition plate 239, the moment load applied to the bolt 253 becomes larger.

[0070] The present embodiment as described above has the following effects:

[0071] First, the rebuilding and replacement works of the comb-tooth shape partition plate 39 is facilitated. This is because of the structure that the comb-tooth shape partition plate 39 is divided into a plurality of partition plate elements 61, so that each of the partition plate elements 61 can be detached separately. Thus, only the partition plate elements 61 subject to be rebuilt or replaced can be detached from the comb-tooth shape backing plate 65 so as to be taken out of the log accommodating body 3.

[0072] The effect of the comb-tooth shape partition plate 37 is substantially the same. The comb-tooth shape partition plate 37 is divided into a plurality of partition plate elements 53, so that each of the partition plate elements 53 can be detached separately. Thus, only the partition plate elements 53 subject to be rebuilt or replaced can be taken out of the log accommodating body 3.

[0073] Also, the effect of the comb-tooth shape partition plate 41 is substantially the same. The comb-tooth shape partition plate 41 is divided into a plurality of partition plate elements 57, so that each of the partition plate elements 57 can be detached separately. Thus, only the partition plate elements 57 subject to be rebuilt or replaced can be taken out of the log accommodating body 3.

[0074] Moreover, a bending moment applied to the comb-tooth shape partition plate 39 is reduced, whereby the stress loading thereof can be lessened. This is because of the structure that, with the disposition of the comb-tooth shape backing plate 65, the spacings of the fixing positions by the bolts 71 can be enlarged, whereby the overhanging length (L.sub.1) can be shortened.

[0075] Moreover, since the overhanging length (L.sub.1) is shortened, it is not necessary to widen the space between the rotor 9 and the rotor 11, and accordingly, the large-sizing of the debarking machine is not required.

[0076] Next, a second embodiment of the present invention will be explained with reference to FIG. 7. According to the first embodiment, all of the spacings of the bolts 71 in the width direction are equal to each other. However, according to the second embodiment, the spacings of respective two pairs of the bolts 71, 71 on the right and left sides of FIG. 7, are larger in the width direction. This structure is realized because the comb-tooth shape backing plate 65 is in the shape of comb-tooth.

[0077] The other structure is substantially the same as that of the first embodiment, so the same reference numerals are allotted to the same elements, and the detailed explanation thereof will not be made.

[0078] Accordingly, substantially the same effect as that of the first embodiment can be realized, and since the spacing of some of the bolts 71 are enlarged in the width direction, a more robust structure can be provided.

[0079] Next, a third embodiment of the present invention will be explained with reference to FIG. 8. According to the third embodiment, a debarking enhancing block 81 is detachably mounted on the comb-tooth shape partition plate 39. The debarking enhancing block 81, of which cross-sectional shape is a low-profile isosceles triangle, is fastened by a plurality of (in the present embodiment, six) bolts 83. The other structure is substantially the same as that of the first embodiment, so the same reference numerals are allotted to the same elements, and the detailed explanation thereof will not be made.

[0080] According to the above structure, substantially the same effect as those of the first and second embodiments can be accomplished, and since the debarking enhancing blocks 81 are provided, the debarking function may be improved.

[0081] The present invention is not limited to the first through third embodiments.

[0082] For example, the first through third embodiments are explained in the case of two rotors. However, the rotors may be three or more.

[0083] Moreover, the first through third embodiments are explained in the case that the comb-tooth shape partition plate is divided into nine pieces along the axial direction of the rotor. However, the number of divided pieces may be determined arbitrarily.

[0084] Moreover, the first through third embodiments are explained in the case that the comb-tooth shape partition plate is fastened to the comb-tooth shape backing plate by bolts. However, for example, pins may be used for fastening.

[0085] The structures shown in the drawings are all for exemplification purposes only.

INDUSTRIAL APPLICABILITY

[0086] The present invention relates to a debarking machine, which for example peels bark from the surface of logs. More specifically, the present invention relates to a debarking machine, provided with a plurality of rotors disposed in parallel, and with a comb-tooth shape partition plate for blocking the mutual space between the rotors, in which rebuilding and replacement works of the comb-tooth shape partition plate are facilitated. The present invention is suitable, for example, for debarking machines used in wood chip plants.

EXPLANATION OF REFERENCE NUMERALS

[0087] 3 log accommodating body

[0088] 9 rotor

[0089] 11 rotor

[0090] 21 debarking plate

[0091] 23 edge

[0092] 33 debarking plate

[0093] 35 edge

[0094] 37 comb-tooth shape partition plate

[0095] 39 comb-tooth shape partition plate

[0096] 41 comb-tooth shape partition plate

[0097] 51 comb-tooth shape partition plate base

[0098] 53 partition plate element

[0099] 55 bolt

[0100] 57 partition plate element

[0101] 59 bolt

[0102] 61 partition plate element

[0103] 63 base main body

[0104] 65 comb-tooth shape backing plate

[0105] 67 support panel

[0106] 71 fixer

[0107] 73 washer

[0108] 81 debarking enhancing block