MODEL RAILROAD CAR FOR CLEANING RAILS

Abstract

A model car includes an attachment member that holds a polishing film, a holding member that rotatably holds the attachment member, and an eccentric mechanism which is able to eccentrically move the attachment member. When the eccentric mechanism penetrates a floor plate of the model car and is held on the floor plate to be movable up and down, the model car is able to be self-propelled while not bearing any weight of the attachment member, the holding member, and the eccentric mechanism in a state in which the polishing film contacts the surface of the model rail.

Claims

1. A model railroad car for cleaning surfaces of rails of a model railroad, comprising: an attachment member that holds a polishing film contacting the surfaces of the rails of the model railroad to clean the surfaces thereof; a holding member that holds the attachment member to be rotatable about an orthogonal shaft orthogonal to a plane including the surface of the rail; and an eccentric mechanism which is able to eccentrically move the attachment member within a plane including the surface of the rail, wherein the eccentric mechanism penetrates a floor plate of the model railroad car for cleaning rails and is held on the floor plate to be movable up and down, thereby the model railroad car for cleaning rails is able to be self-propelling while not bearing any weight of the attachment member, the holding member, and the eccentric mechanism in a state in which the polishing film contacts the surface of the rail.

2. The model railroad car for cleaning rails according to claim 1, wherein the holding member is a bearing, and wherein the eccentric mechanism includes a motor and an eccentric member attached to a motor shaft of the motor.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0014] FIG. 1 is an overall view of a model railroad of an embodiment;

[0015] FIG. 2 is a schematic configuration diagram of a cleaning device of the embodiment;

[0016] FIG. 3 is an enlarged view in which a bottom portion of a model car is viewed from below; and

[0017] FIG. 4 is an overall perspective view of the cleaning device illustrating an appearance of an attachment member.

DESCRIPTION OF THE EMBODIMENTS

[0018] <Configuration of Cleaning Device>

[0019] Hereinafter, an embodiment of the invention will be described with reference to the drawings. FIG. 1 is an overall view of a model railroad S according to the embodiment. In the embodiment, a model car 1 will be described as a typical example. A rail for a model railroad along which the model car 1 travels (rail for model railroad) will be referred to as model rail 2.

[0020] The model car 1 which includes a cleaning device (see FIG. 2) of the rail for the model railroad of the embodiment will be described. In the embodiment, as illustrated in FIG. 1, the traveling direction of the model car 1 is the front and back direction, the direction in which the model car 1 is viewed from the model rail 2 is the up direction, and the opposite direction thereof is the down direction. The left and right direction is defined when the model car 1 is viewed from the front side and the left and right direction may be referred to as the width direction.

[0021] The model car (the model railroad car for cleaning rails) 1 includes a plurality of wheels 4. The wheels 4 are used to roll on the surface of the model rail 2. The cleaning device 3 is provided inside the model car 1. FIG. 2 is a schematic configuration diagram of the cleaning device 3. FIG. 2 illustrates the model car 1 when viewed from the front side and illustrates the interior of the model car 1 for ease of explanation. FIG. 3 is an enlarged view in which the bottom portion of the model car 1 is viewed from below.

[0022] The cleaning device 3 includes a motor 5, an eccentric member 6, a bearing (a holding member) 7, and an attachment member 8. The motor 5 is able to rotate a motor shaft (an orthogonal shaft) 5a by electric power supplied thereto and the motor shaft 5a is disposed to extend downward in the up and down direction. That is, the motor shaft 5a extends in a direction orthogonal to a plane P including the surfaces of the two model rails 2. The motor 5 is disposed so that a cleaning surface 8c contacts the surface of the model rail 2 by its own weight inside the model car 1. For example, as illustrated in FIG. 2, the motor 5 may be held to be movable up and down on a floor plate 10 while the motor 5 penetrates the floor plate 10.

[0023] The eccentric member 6 is attached to the motor shaft 5a. The eccentric member 6 may be attached by various fixing measures such as press-insertion, adhesion, and thermal caulking. The eccentric member 6 has a substantially donut shape including an outer periphery and a center hole, and the center hole is deviated (eccentric) with respect to the center of the outer periphery to a certain degree. When the motor shaft 5a rotates, the outer periphery of the eccentric member 6 rotates eccentrically so that the eccentric operation provides the power of the eccentric movement of the attachment member 8 which is described later. Incidentally, the motor 5 and the eccentric member 6 constitute an eccentric mechanism 9. That is, the eccentric mechanism 9 eccentrically moves the attachment member 8 circumferentially in all directions including the width direction and the front and back direction of the model rail 2 in the plane P.

[0024] A bearing 7 is used to rotatably hold the attachment member 8 about the motor shaft 5a orthogonal to the plane P. The eccentric member 6 is fitted into an inner race of the bearing 7 and an outer race of the bearing 7 is fitted into a through-hole 8a of the attachment member 8. When the motor shaft 5a rotates, the attachment member 8 is eccentrically vibrated by the action of the eccentric member 6. At this time, since the attachment member 8 is freely rotatable with respect to the motor shaft 5a by the bearing 7, the attachment member 8 itself does not rotate in synchronization with the motor shaft 5a.

[0025] The attachment member 8 includes, as illustrated in FIG. 4, the through-hole 8a and a disc portion 8b. The through-hole 8a is formed in the vicinity of the center of the circular shape and the bearing 7 is fitted into the through-hole 8a. The bearing 7 is fixed into the through-hole 8a by press-insertion, adhesion, or thermal caulking.

[0026] The through-hole 8a and the disc portion 8b are concentrically formed. The lower surface (the bottom surface) of the disc portion 8b is formed as a cleaning surface 8c. The cleaning surface 8c has a function of holding the polishing film 8d and cleaning the surface of the model rail 2 in such a manner that a polishing film 8d contacts the surface of the model rail 2.

[0027] The polishing film 8d is preferably finely grained with a grain size of 1 m or less. The cleaning surface 8c moves while drawing an irregular trajectory. A small motor having small torque can be applied as the motor 5. An increase in traveling resistance of the model car 1 due to the polishing may be small. The risk of derailment of the model car 1 due to the cleaning decreases, and the model car 1 can be decreased in weight. There is no need to mount a weight for increasing the weight to the model car 1.

[0028] <Operation of Cleaning Device>

[0029] When the motor shaft 5a starts to rotate at the time of cleaning the model rail 2 by using the model car 1, the attachment member 8 is irregularly vibrated by the action of the eccentric member 6 and the friction resistance between the polishing film 8d and the model rail 2. The attachment member 8 slowly rotates about the motor shaft 5a in a non-synchronized manner. A synthetic trajectory T obtained by the combination of the eccentric movement and the rotational movement of the eccentric member 6 is illustrated in FIG. 3. The synthetic trajectory T illustrated in FIG. 3 indicates the movement trajectory of an arbitrary one point on the polishing film 8d in accordance with the rotation of the motor 5. Since the attachment member 8 moves like the synthetic trajectory T, most of the polishing film 8d is evenly used for cleaning and there is no specific portion which is locally used.

[0030] The model car 1 travels on the model rail 2. The model car 1 travels while the polishing film 8d contacts the surface of the model rail 2 at a constant contact pressure due to the own weight of the motor 5. By using a small and light motor 5, a contact pressure between the polishing film 8d and the surface of the model rail 2 can be made to a small contact pressure and the cleaning operation can be performed at a light contact pressure.

[0031] Since the model car 1 cleans the surfaces of the model rail 2 during the travel, the cleaning operation can be performed simply in not only the long-distance model rail but also the model rail 2 inside a tunnel without performing a complicated manual cleaning operation.

[0032] By the rotation of the motor shaft 5a, the polishing film 8d eccentrically moves (vibrates) in not only the width direction (the left and right direction) but also the front and back direction (that is, in the plane P). Then, the polishing film 8d rotates about the motor shaft 5a in a vibrating manner due to the influence of a change in friction resistance between the surface of the model rail 2 and the polishing film 8d and moves in the same trajectory as that of the synthetic trajectory T. Accordingly, it is possible to clean the model rail 2 while using most of the polishing film 8d thoroughly and efficiently.

[0033] Although the preferred embodiment of the invention has been described above, the invention is not limited thereto, and various modifications and changes can be made within the scope of the gist thereof. For example, the invention includes the following points.

[0034] (Point 1) A rail cleaning device for model railroads provided in a model railroad car includes: an attachment member that holds a polishing film contacting surfaces of rails of a model railroad; a holding member that holds the attachment member to be rotatable about an orthogonal shaft orthogonal to a plane including the surface of the rail; and an eccentric mechanism which is able to eccentrically move the attachment member within a plane including the surface of the rail.

[0035] Accordingly, it is possible to provide a cleaning device of a rail for a model railroad operated at small torque while not requiring a complicated manual cleaning operation and a light and self-propelling model railroad car for cleaning rails.

[0036] (Point 2) The cleaning surface may be a polishing surface. By using the polishing surface containing a polishing agent (so-called dry type), the cleaning operation is simpler as compared with a wet type using a cleaning liquid. Furthermore, the particle size of the polishing agent is preferably 1 m or less.

[0037] (Point 3) The holding member may be a bearing and the eccentric mechanism may include a motor and an eccentric member attached to a motor shaft of the motor. Accordingly, it is possible to configure the cleaning device of the rail for the model railroad without requiring a complicated mechanism part.

[0038] (Point 4) A model railroad car for cleaning rails includes the cleaning device of the rail for the model railroad. Accordingly, since it is possible to perform a cleaning operation using the rail cleaning device for model railroads according to Point 1 only by allowing to travel the model railroad car for cleaning rails, an effect according thereto can be obtained.

REFERENCE SIGNS LIST

[0039] S: model railroad [0040] 1: model car (model railroad car for cleaning rails) [0041] 2: model rail (rail for model railroad) [0042] 3: cleaning device (cleaning device of rail for model railroad) [0043] 4: wheel [0044] 5: motor (part of eccentric mechanism) [0045] 5a: motor shaft (orthogonal shaft) [0046] 6: eccentric member (part of eccentric mechanism) [0047] 7: bearing (holding member) [0048] 8: attachment member [0049] 8a: through-hole [0050] 8b: disc portion [0051] 8c: cleaning surface [0052] 8d: polishing film [0053] 9: eccentric mechanism [0054] 10: floor plate [0055] P: plane [0056] T: synthetic trajectory