JPH0872709A - Traveling wheel supporting device for transportation device - Google Patents

Abstract

PURPOSE: To eliminate nearly all the slip of the traveling wheels even when a transportation device travels a position where rails are curved, and to restrain the wear of the traveling wheels, and also to reduce the occurrence of noise. CONSTITUTION: A block 13 is fixed to a supporting frame 12 arranged above a transportation body, and a bracket 7 is turnable supported by the block 13 through a supporting spindle 14. A bearing 15 is fixed to the bracket 7, and a supporting shaft 16 for supporting a driven wheel 6 that rolls on a rail 2 is supported by the bearing 15. The supporting spindle 14 is arranged in such a position that its axis is nearly brought into the position coinciding with the vertical center line of the driven wheel 6. Guide rollers 17a, 17b are supported by a pair of supporting parts 11a, 11b that have been fitted to the bracket 7 so that they hold the erected part 8 of the rail 2 and the guide projection 9 therebetween. The bracket for supporting a traveling motor is similarly constituted as the bracket 7, and also is supported by the supporting frame 12 in the same way. The driving wheel is fixed to the output shaft of the traveling motor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traveling wheel support device for a transport device, and more particularly to a traveling wheel support device suitable for a monorail type transport device.

[0002]

2. Description of the Related Art Conventionally, a monorail type transfer device has been proposed and implemented which moves along a rail installed on a ceiling and transfers a load from a station in a factory or a warehouse to another station. In Japanese Utility Model Laid-Open No. 5-40904, as a transfer device of this type, as shown in FIGS. 9 and 10, the transfer member 51 includes drive wheels 54 and driven wheels 55 as traveling wheels supported by steering portions 52 and 53. Some are supported via rails 56 so as to be able to travel.
Further, the steering portions 52 and 53 are respectively provided with two pairs of guide rollers 57 that sandwich the folded-back portion 56a at the upper end of the rail 56. The steering parts 52 and 53 are attached so as to be rotatable around an axis line perpendicular to the carrier 51.

[0003]

The carrier is a rail 56.
When approaching the curve position of the steering section 52, 53
Rotates. In the conventional device, the steering portion 5 supporting the drive wheels 54 and the driven wheels 55 rolling on the rails 56.
The centers of rotation of the wheels 2, 53 are eccentric from the centers of the drive wheels 54 and the driven wheels 55. Therefore, the drive wheel 54 and the driven wheel 55 move while slipping when the steering portions 52 and 53 rotate. As a result, there is a problem that the running wheels are easily worn and noise is generated.

The present invention has been made in view of the above-mentioned problems, and an object thereof is to prevent wear of the traveling wheels with almost no slipping of the traveling wheels even when the conveying device travels on a curved position of the rail. Another object of the present invention is to provide a traveling wheel support device for a transportation device that can reduce the generation of noise.

[0005]

In order to achieve the above object, according to the invention of claim 1, a bracket for supporting a spindle of a traveling wheel rolling on a rail is provided in a direction perpendicular to the spindle. The support shaft is rotatably attached to the carrier by a support shaft extending in the vertical direction, and the support shaft is arranged at a position where the axis of the support shaft substantially coincides with the vertical center line of the traveling wheel supported by the bracket.

According to a second aspect of the present invention, the rail is provided with a guide ridge protruding in a direction intersecting the rolling surface of the traveling wheel in the longitudinal direction, and the bracket is provided so as to sandwich the guide ridge. A plurality of guide rollers are arranged.

In the invention according to claim 3, the invention according to claim 1
Alternatively, in the invention according to claim 2, the bracket is attached to the carrier so as to support the carrier in a suspended state.

Further, in the invention described in claim 4,
In the invention according to any one of claims 3 to 3, a current collector that is in sliding contact with the trolley wire arranged along the rail is supported by the bracket.

[0009]

According to the invention described in claim 1, when the carrying device reaches the curved position of the rail, the bracket for supporting the traveling wheel is rotated about the support shaft. Since the support shaft is disposed at a position where the axis of the support shaft substantially coincides with the center of the traveling wheel, the traveling wheel changes its traveling direction according to the curve of the rail with almost no slippage when the bracket rotates.

The invention described in claim 2 has the same operation as that of the invention described in claim 1. Further, since the transport device moves while the guide rollers sandwich the guide ridges of the rail, the bracket is rotated in accordance with the curve of the rail at the curved position of the rail.

According to the third aspect of the invention, the carrier device moves while the carrier body is supported by the rail in a suspended state via the bracket. Other functions are the same as those of the invention described in claim 1 or 2.

Further, in the invention described in claim 4, the current collector turns at the curve position of the rail in accordance with the curve of the rail, and the contact state with the trolley wire is stable even at the curve portion. Other functions are the same as the invention described in any one of claims 1 to 3.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is embodied in a monorail type carrier will be described below with reference to the drawings.

As shown in FIGS. 4 to 6, the carrier device 1 travels along a rail 2 installed near the ceiling. The carrier 3 that constitutes the carrier device 1 is supported in a suspended state on the rail 2 via a bracket 5 that supports a drive wheel 4 that is a running wheel and a bracket 7 that supports a driven wheel 6 that is a running wheel. Has been done. The carrier 3 is equipped with an elevating device (neither of which is shown) for elevating an elevating table on which a load is placed by raising and lowering the belt.

As shown in FIG. 1, the rail 2 has a substantially U-shaped cross section, and an upright portion 8 as a guide ridge is formed at the tip of the lower horizontal portion 2a along the longitudinal direction of the rail 2. ing. A horizontal portion 8a, which is wider than the base end side, is formed at the tip (upper end) of the standing portion 8. Upper horizontal part 2b of rail 2
A guide protrusion 9 projecting downward is formed along the longitudinal direction of the rail 2 at the tip of the rail.

As shown in FIGS. 1 to 3, the bracket 7 includes a main body portion 7a extending in the vertical direction, and a pair of upper and lower mounting portions 10a and 10b horizontally projecting below the main body portion 7a.
It is provided with a pair of upper and lower support portions 11a and 11b which are horizontally provided on the upper side of the main body portion 7a. Both support parts 11a, 11
Between b, a pair of reinforcing plates 7b are fixed by welding in a state of contacting with the main body portion 7a. Also, as shown in FIG.
A rectangular pipe-shaped support frame 12 is arranged below the rails 2 so as to extend along the front-rear direction of the transfer device 1 at approximately the center of the upper part of the transfer body 3. As shown in FIGS. 2 and 5, the block 13 is fixed to the side surface of the support frame 12, and the support shaft 14 is positioned below the upright portion 8 on both sides of the block 13, and both ends of the block 13 move vertically from the block 13. It is rotatably supported in a state of protruding. Both mounting portions 10a and 10b of the bracket 7 are integrally rotatably fixed to both projecting ends of the support shaft 14.

As shown in FIGS. 1 to 3, a bearing 15 is fixed to the upper portion of the main body portion 7a in a state of protruding to the side opposite to the side facing the rail 2, and the driven wheel 6 is supported on the bearing 15 as a spindle. 16
It is rotatably supported on the horizontal portion 8a of the upright portion 8 via. The support shaft 16 is arranged at a position orthogonal to the support shaft 14 so that the axis of the support shaft 14 substantially coincides with the vertical center line of the driven wheel 6. Both supporting portions 11a and 11b are positioned so as to sandwich the driven wheel 6 vertically, and a pair of guide rollers 17a and 17b are rotatably supported at both front and rear ends thereof via a shaft 18 and a bearing (not shown). Has been done. The guide roller 17a is arranged so as to sandwich the guide protrusion 9, and the guide roller 17b is arranged so as to sandwich the upright portion 8.

As shown in FIGS. 1 and 2, a support bracket 19 is fixed to the tip of the upper mounting portion 10a by welding, and the trolley wire 20 arranged along the rail 2 is attached to the support bracket 19. A pair of current collecting units 21 is supported as a current collector that receives power supply and signals from the. Note that the current collecting unit 21 is simplified in FIG. 1.

Like the bracket 7, the bracket 5 is also supported via the block 13 and the support shaft 14 so as to be rotatable relative to the carrier 3. As shown in FIGS. 7 and 8, the bracket 5 that supports the drive wheel 4 is also mounted on the main body 5a as a pair of mounting portions 22a, 22 as in the case of the bracket 7.
b, one set of support portions 23a and 23b are provided, and the carrier 3 is mounted on the attachment portions 22a and 22b via the support shaft 14.
It is supported so as to be rotatable relative to. Support part 23
The a and 23b are formed slightly longer rearward than the support parts 11a and 11b. A traveling motor 24 is fixed by bolts 25 and nuts 26 on the upper side of the main body 5a on the side opposite to the side facing the rail 2. A motor with a speed reducer is used as the traveling motor 24, and the drive wheel 4 is integrally rotatably supported on the output shaft 24a serving as a support shaft. The traveling motor 24 is arranged so that the drive wheels 4 can roll on the horizontal portion 8a, and the axis of the support shaft 14 substantially coincides with the vertical center line of the drive wheels 4. Both support portions 23
The a and 23b are positioned so as to sandwich the drive wheel 4 between the upper and lower sides, and a pair of guide rollers 17a and 17b are arranged at the front and rear ends thereof as in the case of the bracket 7.

A support bracket 27 is fixed to the tip of the upper mounting portion 22a by welding, and a brush 28 for cleaning the trolley wire 20 is attached to the support bracket 27.

Next, the operation of the apparatus configured as described above will be described. The traveling motor 24 is drive-controlled by a control device (none of which is shown) that operates based on a command from the machine operation management computer, and the carrier device 1 moves to the rail 2.
Move along. When the traveling motor 24 is driven, the drive wheels 4 roll on the horizontal portion 8a and the carrier 3 moves.
Guide rollers 17a, 1 mounted on the brackets 5, 7
7b sandwiches the rising portion 8 and the ridge 9 of the rail 2, so that the brackets 5 and 7 are rotated along the curve in the curved portion of the rail 2 as shown in FIG.

When the brackets 5 and 7 are rotated, the output shaft 24a and the support shaft 16, which are the support shafts of the drive wheels 4 and the driven wheels 6 supported by the brackets 5 and 7, rotate in a horizontal plane.
The brackets 5 and 7 are rotated about the support shaft 14, and the brackets 5 and 7 are arranged so that the axis of the support shaft 14 and the center lines of the drive wheel 4 and the driven wheel 6 in the vertical direction substantially coincide with each other.
Also, even if the support shaft of the driven wheel 6 turns in the horizontal plane, the drive wheel 4 and the driven wheel 6 continue rolling with almost no slip. Then, the traveling directions of the drive wheels 4 and the driven wheels 6 are changed according to the curve. Since the drive wheels 4 and the driven wheels 6 hardly slip, wear of the drive wheels 4 and the driven wheels 6 is suppressed, and noise is reduced.

The carrier device 1 receives electric power and signals from the trolley wire 20 arranged along the rail 2 via the current collecting unit 21. Since the current collecting unit 21 is supported by the support bracket 19 fixed to the bracket 7, the current collecting unit 21 is swung along the curve in the curved portion of the rail 2. As a result, the sliding contact state of the current collecting unit 21 with the trolley wire 20 is stably ensured, and power and signals can be received in a stable state. Also, brush 2
8 cleans the trolley wire 20 by sliding along the trolley wire 20 as the transport device 1 moves. Since the brush 28 is attached to the bracket 5 via the support bracket 27, the brush 28 is swung according to the curve in the curved portion of the rail 2, and the trolley wire 20 in the curved portion is also reliably cleaned.

The present invention is not limited to the above embodiment, but may be embodied as follows. (1) The guide rollers 17a and 17b are attached to the brackets 5,
Instead of providing two pairs of upper and lower pairs on 7, the support portions 11a, 11b, 23a, 23b of either one may be omitted. Alternatively, only one pair of guide rollers 17a and 17b may be provided near the driving wheel 4 and the sliding wheel 6, respectively. In this case, the structure is simpler than that of the embodiment.

(2) The rail 2 is provided with a groove having a width substantially equal to the width of the driving wheels 4 and the sliding wheels 6 and having a depth such that the wheels 4 and 6 cannot be removed. The driving wheels 4 and the sliding wheels 6 roll in the grooves. As a moving structure, the guide rollers 17a and 17b may be omitted. In this case, the structure becomes simpler.

(3) The drive wheel 4 and the sliding wheel 6 may be configured to roll on the lower horizontal portion of the substantially U-shaped rail 2 as in the conventional example. (4) Attach the current collecting unit 21 and the brush 28 to the bracket 5,
It may be attached to a place other than 7.

(5) The transfer device 1 may be applied to a battery-powered device or a non-contact power feeding device. (6) Instead of supporting the carrier 3 on the rail 2 in a suspended state, the carrier 3 may move above the rail 2. In this case, the present invention can be applied not only to the carrier device that travels on the rail 2 installed on the ceiling but also to the carrier device that travels on the rail laid on the floor surface.

Inventions other than those described in the claims that can be grasped from the respective embodiments and modifications will be described below together with their effects. (1) In the invention described in claim 2, a pair of guide rollers is provided near the traveling wheels. In this case, the number of guide rollers is reduced and the structure is simplified.

(2) In the invention described in claim 2, the rail is provided with guide ridges on both upper and lower sides of the traveling wheel, and the bracket is provided with four pairs of guide rollers so as to sandwich both guide ridges. In this case, the support state of the carrier is stable.

[0030]

As described in detail above, the first to fourth aspects of the invention are described.
According to the invention described in (1), there is almost no slip of the traveling wheels even when the transport device travels on the curved position of the rail, and it is possible to suppress the abrasion of the traveling wheels and reduce the noise generation. According to the second aspect of the invention, the support state of the carrier is stable. Further, according to the invention described in claim 4, the contact state between the current collector and the trolley wire is stable even at the curve position.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a supported state of driven wheels according to an embodiment of the present invention.

FIG. 2 is a partial plan view of the same.

FIG. 3 is a rear view of the bracket.

FIG. 4 is a schematic side view of a transport device.

FIG. 5 is a schematic front view of the transport device.

FIG. 6 is a schematic plan view showing an operation.

FIG. 7 is a partial plan view showing a supporting state of drive wheels.

FIG. 8 is a cross-sectional view showing a supported state of drive wheels.

FIG. 9 is a schematic plan view of a conventional example.

FIG. 10 is a schematic front view of the same.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Conveying device, 2 ... Rail, 3 ... Conveyor, 4 ... Driving wheel as a running wheel, 6 ... Follower wheel, 5, 7 ... Bracket, 8 ... Standing part as a guide ridge, 9 ... Guide ridge ,
14 ... Support shaft, 16 ... Support shaft, 17a, 17b ... Guide roller, 20 ... Trolley wire, 21 ... Current collecting unit as current collecting unit, 24 ... Running motor, 24a ... Output shaft as supporting shaft.

Claims (4)

[Claims] 1. A bracket for supporting a support shaft of a traveling wheel rolling on a rail is rotatably attached to a carrier by a support shaft extending in a direction perpendicular to the support shaft. A traveling wheel supporting device for a conveying device, the axis of which is arranged substantially at the vertical center line of the traveling wheel supported by the bracket. 2. The rail is provided with a guide ridge protruding in a direction intersecting a rolling surface of a traveling wheel in a longitudinal direction, and a plurality of guide rollers are arranged on the bracket so as to sandwich the guide ridge. The traveling wheel support device of the conveyor according to claim 1. 3. The traveling wheel support device for a carrier device according to claim 1, wherein the bracket is attached to the carrier so as to support the carrier in a suspended state. 4. The traveling wheel support device for a carrier device according to claim 1, wherein a current collector that is in sliding contact with a trolley wire arranged along a rail is supported by the bracket.