JPH0542210U - Roller drive - Google Patents

Abstract

(57) [Summary] [Purpose] To enable main parts such as rollers to be shared by the drive-type roller conveyor and the non-drive-type roller conveyor without waste. A friction wheel 42 is rotatably supported on a support shaft 40 having one end of a drive shaft 20 rotatably supported. The other end of the support shaft 40 is urged upward by the spring plunger 50, and the compression coil spring 90
Thereby pressing the friction wheel 42 against the rotating wheel 36. The rotation of the drive shaft 20 and the rotation wheel 36 is transmitted to the roller 14 by friction through the friction wheel 42.
A drive type roller conveyor or a non-drive type roller conveyor can be configured by attaching or detaching the roller drive device 18, and it is not necessary to provide a dedicated driven portion such as a sprocket or gear to the roller, so that the roller or the like can be provided. Main parts can be shared without waste.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a roller driving device that drives a roller of a roller conveyor.

[0002]

[Prior Art]

 The roller conveyor comprises a frame and a plurality of rotatable rollers mounted on the frame, and a drive type roller conveyor provided with a drive device for rotating the roller and a non-drive type roller not provided with the drive device. There is a conveyor. These were usually made separately. If the common parts such as rollers and frames are shared, cost reduction due to mass production can be expected. However, even if the drive device is removed from the drive type roller conveyor, the driven parts such as sprockets and gears that are integrally provided on the rollers remain, and that part is wasted as a non-drive type roller conveyor. This is because it is cheaper to manufacture the roller conveyor separately.

[0003]

[Problems to be solved by the device]

 In view of the above circumstances, the present invention provides a roller driving device that enables at least a roller, and in some cases, a roller shaft and a frame to be shared by a driving roller conveyor and a driven roller conveyor without waste. The goal was to obtain

[0004]

[Means for Solving the Problems]

 In order to solve this problem, a roller drive device of the present invention comprises a drive shaft extending parallel to the carrying direction of a roller conveyor, a drive shaft extending below the roller in a direction orthogonal to the drive shaft, and a drive shaft rotating at one end. A support shaft movably supported, a friction wheel rotatably attached to the support shaft, and an outer peripheral surface of which is in contact with the outer peripheral surface of the roller, and the other end of the support shaft is pushed upward. It is configured to include a biasing means for pressing the friction wheel against the roller, and a rotation transmission device for transmitting the rotation of the drive shaft to the friction wheel.

As the rotation transmission device, for example, a rotation shaft that rotates integrally with the drive shaft may be provided on the drive shaft. The rotating wheel is arranged so that the outer peripheral surface thereof and the end surface of the friction wheel are in contact with each other, and the friction between them transmits the rotation of the rotating wheel to the friction wheel. It is also possible to employ a bevel gear pair, a combination of a worm and a worm wheel, and the like.

[0006]

[Action]

 In the roller conveyor equipped with the roller driving device of the present invention, when the drive shaft is rotated, its rotation is transmitted to the friction wheel by the rotation transmission device, and the rotation of the friction wheel is transmitted to the outer peripheral surface of the friction wheel and the outer peripheral surface of the roller. Is transmitted to the roller by friction. Since the drive shaft extends parallel to the conveying direction, and the support shaft extends below the roller at right angles to the drive shaft, the friction wheel and the roller attached to the support shaft are parallel, and further, One end of the support shaft is rotatably supported by the drive shaft, and the other end is supported while being pushed up by the biasing means, so that the outer peripheral surface of the friction wheel is pressed sufficiently against the outer peripheral surface of the roller. Be done.

[0007]

[Effect of the device]

 According to the roller driving device of the present invention, it is possible to obtain a driving type roller conveyor without providing a dedicated driven portion for the roller. Further, the roller driving device of the present invention can be easily changed to a driving type roller conveyor by attaching it to a non-driving type roller conveyor. Further, by removing the roller driving device from the driving type roller conveyor, the non-driving type roller conveyor can be easily obtained, and further, since the roller does not have a dedicated non-driving part, it can be used without waste. Furthermore, since the rotation of the support shaft is used to press the friction roller against the outer peripheral surface of the roller, the structure is simpler than when the support shaft is moved in parallel, and the drive shaft serves as a support member for the support shaft. Since it is used, the structure is further simplified, and it is possible to reduce the cost and downsize the device.

[0008]

【Example】

 Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. 1 to 3 show a roller conveyor equipped with a roller driving device according to an embodiment of the present invention. Reference numerals 10 and 12 are side frames of the roller conveyor. The side frames 10 and 12 are made of U-shaped grooved section steel, and extend in parallel to each other along the conveying direction, are connected to each other by a connecting frame (not shown), and are supported by supporting legs. A large number of rollers 14 are rotatably attached to the side frames 10 and 12. Each roller 14 is rotatably supported by a roller shaft 16, and the roller shaft 16 is supported by the side frames 10 and 12 in a posture extending at right angles to the side frames 10 and 12.

A drive device 18 is provided below the plurality of rollers 14. The drive device 18 includes a drive shaft 20, a bar 22, a stay 24, a fixing metal fitting 26, and the like. The bar 22 extends in the transport direction in parallel with the drive shaft 20, and is fixed to a plurality of stays 24. The stays 24 are made of chevron steel, extend in a direction perpendicular to the conveying direction, and are arranged at substantially equal intervals. The fixing member 26 is a U-shaped member, and a female screw hole 27 is formed in the center of the upper arm. The fixing metal fitting 26 is attached so as to sandwich the lower flange 28 of the side frame 10 and the horizontal portion 30 of the stay 24, and the stay 24 is fixed to the side frame 10 by screwing a bolt 29 into the female screw hole 27. To be done.

The drive shaft 20 extends over a plurality of stays 24, and is rotatably supported by the stays 24 via bearings 34. The drive shaft 20 is rotated by a drive device (not shown). Rotation wheels 36, support wheels 38, and support shafts 40 are attached to the drive shaft 20 in the same number as the rollers 14, and friction wheels 42 are attached to the support shafts 40, respectively.

The bar 22 is formed with the same number of female screw holes 48 as the rollers 14, and spring plungers 50 are screwed into the female screw holes 48, respectively. The spring plunger 50 includes a plunger 52 having a hemispherical head, a bottomed cylindrical main body 54 having an external thread formed on the outer surface, and a main body 54 arranged inside the main body 54 to project the plunger 52 in the protruding direction. The main body 54 is screwed into the female screw hole 48 of the bar 22, and the nut 56 is screwed into the downwardly projecting portion of the bar 22. It is fixed upward.

A rotating wheel 36 is fixed to the drive shaft 20 by means of hexagon socket head bolts 60 so that it can rotate integrally with the drive shaft 20. Further, the support wheel 38 is fitted to the drive shaft 20 so as to be relatively rotatable, and is sandwiched by the bearing 34 and the collar 66 fixed to the rotary shaft 20 from both sides via thrust bearings 62 and 64. Therefore, it does not move in the axial direction. A semi-radial hole 68 is formed on the outer peripheral surface of the support wheel 38, and a projection 70 formed at one end of the support shaft 40 is fitted into the hole 68 and fixed by welding. That is, one end of the support shaft 40 is rotatably supported by the drive shaft 20 and extends in the direction orthogonal to the drive shaft 20. A friction wheel 42 is rotatably fitted to the support shaft 40 via a bearing 74, and a hemispherical head portion of a plunger 52 of the spring plunger 50 is fitted in a conical hole 76 formed at the other end. Has been inserted.

The friction wheel 42 is made of hard rubber such as polyurethane and has a bottomed cylindrical shape. The friction wheel 42 is arranged such that the end surface 80 contacts the outer peripheral surface 81 of the rotating wheel 36 and the outer peripheral surface 82 contacts the outer peripheral surface 83 of the roller 14. A retainer 86 is provided near the opening of a recess 84 formed inside the friction wheel 42, supported by a stop shaft 88, and a compression coil spring 90 is disposed between the retainer 86 and the bearing 74. The inner ring of the bearing 74 is slidably fitted to the supporting shaft 40, and the compression coil spring 90 is oriented so that the friction wheel 42 and the end surface 80 are pressed against the outer peripheral surface 81 of the rotating wheel 36 via the bearing 74. Is urged to.

As is clear from the above description, the friction force for transmitting the rotation of the rotary wheel 36 to the friction wheel 42 by the compression coil spring 90, and the rotation of the friction wheel 42 by the spring plunger 50. The frictional force to be transmitted to the rollers 14 is appropriately generated. That is, the rotary wheel 36 and the compression coil spring 90 compose a rotation transmission device, and the spring plunger 50 composes an urging device.

In the roller conveyor configured as described above, when the drive shaft 20 is rotated, the rotary wheel 36 is rotated, and the friction wheel 42 pressed against the outer peripheral surface thereof is rotated. As the friction wheel 42 rotates, the roller 14 rotates, moving the load on the roller 14. If the load on the roller 14 stops moving due to contact with the previous load, the roller 14 will not rotate, but between the roller 14 and the friction wheel 42 or between the friction wheel 42 and the rotation wheel 36. It is possible to prevent the roller shaft from being overloaded by allowing the drive shaft 20 to rotate due to slippage.

By removing the roller driving device 18 from this drive type roller conveyor, that is, by removing the fixing member 26 from the side frames 10 and 12, it can be changed to a non-drive type roller conveyor. On the contrary, if the roller driving device 18 is attached to the non-drive type roller conveyor, it can be changed to a drive type roller conveyor. In this case, since the rollers 14 do not require non-driving parts such as sprockets and gears, the main parts including the side frames 10 and 12, the rollers 14 and the roller shafts 16 can be shared by the non-driving type roller conveyor without waste. ..

Another embodiment of the present invention is shown in FIG. The present embodiment is a modification of the friction wheel of the above embodiment. The friction wheel 42 of the above-described embodiment is entirely made of hard rubber, but the friction wheel 100 of this embodiment is partially formed of the hard rubber layer 102. The hard rubber layer 102 is formed on the outer peripheral surface of the friction wheel body 104 by vulcanization adhesion.

Another embodiment of the present invention is shown in FIG. In the present embodiment, the friction wheel is another mode. A cylindrical member 114, to which a hard rubber layer 112 is vulcanized and adhered, is attached to the outer peripheral surface of the friction wheel body 110 of this embodiment. The outer peripheral surface of the friction wheel body 110 is a stepped surface, and the cylindrical member 114 is fitted to the small diameter portion 116 and the nut 118 is screwed to the male screw portion.

By forming the outer peripheral portion with the hard rubber layer as in both of these embodiments, the hardness of the outer peripheral surface of the friction wheel can be adjusted by changing the thickness of the hard rubber layer. Moreover, in the later embodiment, when the hard rubber layer is worn, the entire cylindrical member 114 can be easily replaced.

In the above embodiment, the rotary wheel is provided and the rotation of the drive shaft is transmitted to the friction wheel by the friction between the outer peripheral surface of the rotary wheel and the end surface of the friction wheel. The rotation of the drive shaft may be transmitted to the friction wheel by engaging with a bevel gear integrally formed with the friction wheel. Further, although hard rubber is used for the friction wheel in the above-described embodiments, the material is not limited to hard rubber, and any material having a large friction coefficient may be used. Further, in the above embodiment, all the rollers are provided with friction wheels, rotary wheels, etc. so that all the rollers can be driven. However, the number of driven rollers may be one or plural rollers. ..

Although not exemplified, the present invention can be implemented in various modified and improved modes based on the knowledge of those skilled in the art without departing from the scope of the claims for utility model registration. ..

[Brief description of drawings]

FIG. 1 is a plan view (partially sectional view) of a roller conveyor including a roller driving device according to an embodiment of the present invention.

FIG. 2 is a front view of the roller conveyor.

3 is a cross-sectional view taken along the line AA in FIG.

FIG. 4 is a sectional view of a friction wheel according to another embodiment of the present invention.

FIG. 5 is a sectional view of a friction wheel according to still another embodiment of the present invention.

[Explanation of symbols]

 14 Roller 18 Roller drive device 20 Drive shaft 26 Fixing fitting 36 Rotating wheel 38 Support wheel 40 Support shaft 42,100 Friction wheel 50 Spring plunger 104,110 Friction wheel body

Claims (1)

[Scope of utility model registration request] 1. A roller driving device for driving a roller of a roller conveyor, comprising: a drive shaft extending parallel to a conveying direction of the roller conveyor; an end portion extending below the roller in a direction orthogonal to the drive shaft. A support shaft rotatably supported by a drive shaft, a friction wheel rotatably attached to the support shaft, and an outer peripheral surface of which is in contact with the outer peripheral surface of the roller, and the other end of the support shaft. A roller driving device comprising: a biasing unit that pushes up a portion upward and presses the friction wheel against the roller; and a rotation transmission device that transmits rotation of the drive shaft to the friction wheel.