JP2016112983A - Transport bogie - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transport bogie which can regulate movement to two traveling directions of a fore-and-aft traveling direction and a cross-traveling direction, and can facilitate the movement to the two traveling directions.SOLUTION: A transport bogie 1 comprises a cargo-loading platform 2, four wheels 21, a changeover member 3, a fore-and-aft wheel 41, and a cross direction wheel 42. The changeover member 3 is arranged at a lower face of the cargo-loading platform 2. The fore-and-aft wheel 41 is arranged at the changeover member 3, and grounded on a ground face F together with the four wheels 21 when the changeover member 3 is brought into a first state 301, and rotates. The cross direction wheel 42 is arranged at the changeover member 3, grounded on the ground face F together with the four wheels 21 when the changeover member 3 is brought into a second state, and rotates.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a transport carriage used for transporting a transported object.

In the factory, when carrying various parts, products, etc., a transport cart that can be manually pushed by an operator or pulled by a towing vehicle is often used. In order to improve the convenience of the conveyance carriage, various devices have been devised to add various functions to the wheels provided in the conveyance carriage.
For example, in the fixed / universal type carriage of Patent Document 1, a state in which the movable part is grounded and a state in which the movable surface is not grounded can be formed with respect to the base part provided with a plurality of universal wheels. It is disclosed to provide a single fixed wheel. By providing this fixed type wheel, it is possible to easily change the direction, and the convenience of storage and entry into a narrow place is improved.

  Further, for example, Patent Document 2 discloses a transport carriage having a movable part provided with a free wheel, a loading part on which an article to be transported is placed, and a support part that rotatably supports the loading part with respect to the movable part. Has been. In this transport cart, it is possible to easily change the direction of travel and turn even when a heavy object is loaded, and to easily align the position when moving to a predetermined position.

JP 7-242175 A JP 2000-198446 A

  However, in the said patent documents 1, 2, the device which regulates the driving | running | working direction at the time of a trolley | bogie traveling to two directions is not made | formed. The movement of the carriage by an operator, a towing vehicle or the like can be classified into movement to the vicinity of the destination and movement between the vicinity of the destination and the transfer position of the transported object. Therefore, in order to improve the convenience of the carriage, the state of the wheel when the carriage moves to the vicinity of the destination and the state of the wheel when the carriage moves between the vicinity of the destination and the transfer position, A technique that can be formed with a simple structure is desired.

  The present invention has been made in view of such a background, and can control movement in two traveling directions, that is, a front-rear traveling direction and a crossing traveling direction, and facilitate movement in the two traveling directions. It was obtained by trying to provide a transport cart that can be used.

One aspect of the present invention is a transport carriage used for transporting a transported object,
A loading platform on which the transported goods are loaded;
At least four wheels provided on the cargo bed in a state of being rotatable about a vertical rotation axis;
A first state provided when the transport carriage moves in the front-rear direction, and a second state formed when the transport cart moves in a direction crossing the front-rear direction; A switching member that can be switched between two states;
A front-rear wheel that is provided on the switching member and rotates while being grounded together with the at least four wheels when the switching member is in the first state;
And a crossing-direction wheel that is provided on the switching member and rotates in contact with the ground together with the at least four wheels when the switching member is in the second state.

In addition to at least four wheels (universal wheels) that can be directed in an arbitrary traveling direction, the transport carriage includes a switching member provided with front and rear direction wheels and cross direction wheels. The switching member can form a first state for grounding the front-rear wheel to the ground and a second state for grounding the cross-direction wheel to the ground.
When the transport cart moves to the vicinity of the destination in a state where the transported object is loaded on the loading platform or in a state where the transported product is not loaded on the loading platform, the switching member can be set to the first state. Thereby, the front-rear wheel is grounded together with at least four wheels. Then, the moving direction of the transport carriage is regulated (guided) in the front-rear direction by the front-rear wheels. Therefore, the movement of the transport carriage in the front-rear direction can be facilitated.

  On the other hand, when the transport cart is moved between the vicinity of the destination and the transfer position in the state in which the transported object is loaded on the loading platform or the transported product is not loaded on the loading platform, the switching member is set to the second state. can do. Thereby, the cross direction wheel is grounded to the ground together with at least four wheels. And the movement direction of a conveyance trolley is controlled (guided) in the direction (crossing traveling direction) crossing the front-rear traveling direction by the crossing direction wheel. Therefore, the movement of the transport carriage in the crossing direction can be facilitated.

As described above, according to the transport carriage, movement can be regulated (guided) in the two traveling directions of the front and rear traveling direction and the cross traveling direction, and the movement in the two traveling directions can be facilitated. it can.
“The movement of the transport carriage is regulated in the forward / rearward travel direction” means that the transport carriage can move in the forward / backward travel direction and can be steered left and right when the transport carriage travels in the forward / backward travel direction. I mean. In addition, “the movement of the transport carriage is regulated in the cross travel direction” means that the transport cart can move in the cross travel direction and can be steered left and right when the transport cart travels in the cross travel direction. I mean. Further, the “crossing direction” and the “crossing traveling direction” may be a direction inclined at a predetermined angle with respect to the front-rear traveling direction, in addition to a direction orthogonal to the front-rear traveling direction.

Explanatory drawing which shows the conveyance trolley | bogie which has a switching member in a 1st state concerning an Example. Explanatory drawing which shows the conveyance trolley | bogie which has a switching member in a 2nd state concerning an Example. Explanatory drawing which shows the state which looked at the conveyance trolley | bogie from an upper direction concerning an Example. Explanatory drawing which shows the state which looked at the conveyance trolley | bogie concerning the Example from the front-back direction. Explanatory drawing which shows the periphery of a switching member and an operation member in the conveyance trolley | bogie which has a switching member in a 1st state concerning an Example. Explanatory drawing which shows the periphery of a switching member and an operation member in the conveyance trolley | bogie which has a switching member in a 2nd state concerning an Example. An explanatory view showing the state where a plurality of conveyance trolleys concerning an example were connected.

A preferred embodiment of the above-described transport carriage will be described.
In the transport cart, the ground includes various surfaces such as a floor surface in a factory and a ground surface outside the factory.
In addition, the switching member is configured to rotate around a rotation center portion whose rotation center axis is directed in the horizontal direction, and to switch between the first state and the second state, The front-rear wheel and the cross-direction wheel may be provided at positions opposite to each other across the rotation center portion in the switching member.
In this case, the first state and the second state of the switching member can be easily formed by rotating the switching member. In addition, it is possible to facilitate the movement of the transport carriage in two traveling directions, that is, a front-rear traveling direction and a direction orthogonal to the front-rear traveling direction (orthogonal traveling direction).

  In addition, an operation member having a member engaging portion that engages with the switching member at one end is rotatably provided on the loading platform, and the transport carriage is a towing vehicle at the other end of the operation member. A traction engagement portion that is engaged with an engaged portion provided on the loading platform of the towing vehicle or the other transport cart when being towed by the towing vehicle; An engaged state in which the engaging portion is engaged with the engaged portion and the switching member is rotated to the first state, and the engagement of the traction engaging portion with the engaged portion is released. In addition, the switching member may be switchable between two states: a released state rotated to the second state.

  In this case, the operation member can have a function of switching the switching member between the first state and the second state and a function used for towing by the towing vehicle. When the operation member is in the engaged state, the traction engagement portion is engaged with the engaged portion provided in the traction vehicle or other transport carriage, and the switching member is grounded to the ground in the front-rear direction. To the first state. Thereby, the conveyance trolley | bogie by which a moving direction is controlled by the front-back direction wheel by the front-back direction wheel can be pulled to the destination vicinity by this.

On the other hand, when the operation member is released, the state in which the traction engagement portion is engaged with the engaged portion is released, and the switching member is changed to the second state in which the cross-direction wheel is grounded to the ground. it can. Thereby, the worker or the like can move the transport carriage whose movement direction is regulated by the cross direction wheel in the cross traveling direction or the orthogonal traveling direction between the vicinity of the destination and the loading position.
Therefore, by using the operation member, it is possible to facilitate each operation of switching the switching member and connecting the transport carriage to the towing vehicle or the like.

  Further, the switching member is disposed on the cargo bed in a state of extending in the front-rear direction, and one end of the switching member is engaged with the member engaging portion of the operation member, When the operating member is switched from the engaged state to the released state, the other end of the switching member is in the other transport cart with respect to the engaged portion provided on the cargo bed of the transport cart. The operation member may be configured to release the engagement of the traction engagement portion.

  This configuration is effective when a plurality of transport carts are connected and towed by a tow vehicle. In this case, the operation member in one or a plurality of transfer carriages connected to the rear of the leading transfer carriage is also engaged by releasing the operation member in the first transfer carriage connected to the towing vehicle from the engaged state. The state can be released. Therefore, after the traction by the towing vehicle is finished, the state in which the plurality of transport carts are connected can be released at once. Then, after being pulled to the vicinity of the destination by the towing vehicle, each transport carriage can be individually moved from the vicinity of the destination to the transfer position.

Further, the front-rear wheel or the cross-direction wheel may be arranged in a central portion of a region surrounded by the at least four wheels.
In this case, the transport carriage can be rotated in the horizontal direction while rotating at least four wheels around the front-rear wheel or the cross-direction wheel.

Below, the Example concerning a conveyance trolley is described with reference to drawings.
As shown in FIGS. 1 to 4, the transport cart 1 of this example is used for transporting a transported object 8, and can be manually pushed by an operator and pulled by a towing vehicle 6. The transport carriage 1 includes a loading platform 2, four wheels 21, a switching member 3, front and rear direction wheels 41, and cross direction wheels 42. The loading platform 2 is a portion on the transportation cart 1 on which the conveyed product 8 is loaded. The four wheels 21 are universal wheels whose directions can be arbitrarily changed, and are provided on the lower surface of the loading platform 2 so as to be rotatable around a rotation axis C in the vertical direction. The four wheels 21 are grounded to the ground F and rotate when the transport carriage 1 moves in an arbitrary traveling direction.

  The switching member 3 is provided on the lower surface of the loading platform 2, and a first state 301 formed when the transport cart 1 moves in the front-rear direction D, and a direction in which the transport cart 1 is orthogonal to the front-rear direction D ( It is possible to switch between two states, the second state 302 formed when moving in the orthogonal traveling direction W). The front-rear wheel 41 is provided on the switching member 3 and rotates while being grounded to the ground F together with the four wheels 21 when the switching member 3 is set to the first state 301 as shown in FIG. The crossing direction wheel 42 is provided in the switching member 3 and rotates while being grounded to the ground F together with the four wheels 21 when the switching member 3 is brought into the second state 302 as shown in FIG.

Below, the conveyance trolley | bogie 1 of this example is explained in full detail with reference to FIGS.
The transport cart 1 of this example is configured to be pulled by a towing vehicle 6 in a state where a plurality of vehicles are connected. When the plurality of transport carts 1 are pulled by the towing vehicle 6, the movement is guided in the front-rear direction D by the front-rear wheels 41. On the other hand, when the plurality of transport carts 1 are manually pushed by the operator, the movement in the orthogonal traveling direction W is guided by the cross-direction wheels 42.

  The movement of the transport carriage 1 by the towing vehicle 6 can be, for example, a movement from a storage position of the transported goods 8 (products, parts, etc.) in the factory to another storage position or a shipping position. It can be moved to near the ground. On the other hand, the movement of the transport carriage 1 by the operator can be, for example, a movement from a storage position or a shipping position to a position where a shelf is provided. Further, the movement of the transport carriage 1 by the operator is a movement between a storage position or a shipping position and a position where the transported article 8 is loaded on the loading platform 2 or unloaded from the loading platform 2. be able to.

  As shown in FIG. 3, the four wheels 21 are provided in the vicinity of the four corners on the lower surface of the loading platform 2. The switching member 3 is disposed on the loading platform 2 in a state of extending in the front-rear traveling direction D. The loading platform 2 is formed to have a longer length in the front-rear traveling direction D than the width in the orthogonal traveling direction W. At one end of the loading platform 2 in the front-rear traveling direction D, a support portion 26 that can support the conveyed product 8 loaded on the loading platform 2 is provided. Handle support portions 24 for attaching handles 25 that can be gripped by an operator are provided at both ends of the loading platform 2 in the orthogonal traveling direction W. Then, the operator can attach the handle 25 to any one of the handle support portions 24 and manually push the transport carriage 1 in the orthogonal traveling direction W via the handle 25.

As shown in FIGS. 5 and 6, the loading platform 2 is provided with a first rotation support shaft 22 whose rotation center axis is directed in the horizontal direction, and the switching member 3 is a first rotation support shaft. 22, and is configured to switch between a first state 301 and a second state 302. The switching member 3 has a rotation center portion 31 supported by the first rotation support shaft 22.
The front-rear wheel 41 and the cross-direction wheel 42 are provided on the switching member 3 at positions opposite to each other with the rotation center portion 31 interposed therebetween. In other words, the cross direction wheel 42 is provided in the first part 32 located on one side of the rotation center portion 31 in the switching member 3. Further, the front-rear wheel 41 is provided in the second portion 33 located on the other side of the rotation center portion 31 in the switching member 3. Moreover, the 1st site | part 32 of the switching member 3 is comprised by the member which can be expanded-contracted.

  In the vicinity of the end of the loading platform 2 in the front-rear direction D, a second rotation support shaft 23 having a rotation center axis oriented in the horizontal direction is provided. An operation member 5 that engages with the switching member 3 is rotatably provided on the second rotation support shaft 23. The operation member 5 has a rotation part 53 supported by the second rotation support shaft 23. One end of the operation member 5 is provided with a member engagement portion 51 that engages with the end portion of the first portion 32 of the switching member 3, and the other end of the operation member 5 is provided with a traction engagement portion 52. It has been.

As shown in FIGS. 5 and 6, an engaged portion 27 to which the traction engagement portion 52 can be engaged is provided at the other end portion in the front-rear direction D of the loading platform 2. The traction engagement portion 52 is engaged with the engaged portion 61 in the traction vehicle 6 or the engaged portion 27 in the loading platform 2 of another conveyance trolley 1 when the conveyance vehicle 1 is pulled by the traction vehicle 6. It is a part.
The pulling engagement portion 52 of this example is configured by an engagement hole, and the engaged portions 27 and 61 of this example are configured by a shaft portion that is inserted into the engagement hole. Note that the traction engagement portion 52 may be configured by a shaft portion, and the engaged portions 27 and 61 may be configured by engagement holes.

An end portion 321 (one end portion 321 of the switching member 3) in the first portion 32 of the switching member 3 is engaged with the member engaging portion 51 of the operation member 5. As shown in FIG. 5, the operation member 5 includes an engagement state 501 in which the traction engagement portion 52 is engaged with the engaged portions 27 and 61 and the switching member 3 is rotated to the first state 301. As shown in FIG. 6, there are two states: a released state 502 in which the engagement of the traction engagement portion 52 with the engaged portions 27 and 61 is released and the switching member 3 is rotated to the second state 302. Can be switched to.
Further, the loading platform 2 is provided with a lock portion 28 for maintaining the operation member 5 in the released state 502. The lock portion 28 can have various configurations that prevent the operation member 5 from falling from the released state 502 to the engaged state 501. The lock portion 28 can be configured by, for example, a rotatable bar, an elastic rubber band, and the like.

  As shown in FIGS. 3 and 5, when the operation member 5 is in the engaged state 501 and the switching member 3 is in the first state 301, the end 331 (the switching member 3 of the switching member 3) in the second portion 33 of the switching member 3. The other end 331) is arranged around the shaft portion constituting the engaged portion 27 of the loading platform 2. As shown in FIG. 6, when the operation member 5 is lifted and switched from the engaged state 501 to the released state 502, the switching member 3 is switched from the first state 301 to the second state 302, and the switching member 3 is switched. The end portion 331 of the second portion 33 is lifted upward from the periphery of the shaft portion. As a result, when the traction engagement portion 52 of the operation member 5 in the other conveyance carriage 1 is engaged with the engaged portion 27 in the conveyance carriage 1, the end portion 331 in the second portion 33 of the switching member 3 is used. The engagement of the traction engagement portion 52 with respect to the engaged portion 27 is released.

  Further, the switching member 3 and the operation member 5 are arranged at the center position in the orthogonal traveling direction W in the loading platform 2, and the cross direction wheel 42 is arranged at the center of the region surrounded by the four wheels 21. Then, when the switching member 3 is set to the second state 302 and the transport cart 1 is caused to function as a hand cart, the operator rotates the four wheels 21 around the cross-direction wheels 42 while transporting the transport cart 1. Can be rotated horizontally. Thereby, the worker can easily change the direction of the transport carriage 1.

  As for the structure of the switching member 3 and the mounting positions of the front-rear wheel 41 and the cross-direction wheel 42 with respect to the switching member 3, the moment acting on the second portion 33 of the switching member 3 including the weight of the front-rear wheel 41 is It is determined to be larger than the moment acting on the first portion 32 of the switching member 3 including the weight. When the switching member 3 is in the first state 301, the state where the front-rear wheel 41 is grounded to the ground F is maintained.

Next, the operation | movement which moves the conveyance trolley 1 of this example, and an effect are demonstrated.
When the transport cart 1 in a state where a plurality of vehicles are connected is pulled by the towing vehicle 6, the operator arranges the plurality of transport carts 1 loaded with the transported objects 8 on the loading platform 2 in a line. Then, as shown in FIG. 7, the worker engages the traction engagement portion 52 of the operation member 5 in the first (leading) transport carriage 1 with the engaged portion 61 of the traction vehicle 6. The traction engagement portion 52 of the operation member 5 in the first and subsequent transport carts 1 is engaged with the engaged portion 27 of the transport cart 1 located immediately before. At this time, when the operator switches the operation member 5 from the released state 502 to the engaged state 501, the switching member 3 is switched from the second state 302 to the first state 301. The front-rear wheel 41 in each transport carriage 1 is grounded to the ground F together with the four wheels 21.

Next, the worker causes the towing vehicle 6 to travel and moves the plurality of transport carts 1 to the vicinity of the destination. Then, the transport carriage 1 whose moving direction is regulated (guided) by the front-rear wheel 41 in the front-rear direction D is pulled to the vicinity of the destination. Therefore, it is possible to easily pull the plurality of transport carts 1 by the towing vehicle 6.
Note that the operator can also manually push the transport carriage 1 in the front-rear direction D while the switching member 3 is in the first state 301 and the front-rear wheel 41 is grounded to the ground F.

Next, after the plurality of transport carts 1 arrive near the destination, the operator switches the operation member 5 in the first transport cart 1 from the engaged state 501 to the released state 502 as shown in FIG. At this time, the switching member 3 in the first transport cart 1 is switched from the first state 301 to the second state 302, and the end portion 331 in the second portion 33 of the switching member 3 is the second transport cart. The operating member 5 in 1 is lifted. Further, the switching member 3 in the second transport cart 1 is switched from the first state 301 to the second state 302, and the end portion 331 in the second portion 33 of the switching member 3 is connected to the third transport cart 1. The operating member 5 is lifted. Thereafter, the switching member 3 in each transport carriage 1 can be simultaneously switched from the first state 301 to the second state 302 in accordance with the number of transport carts 1 connected.
In this way, the state where the plurality of transport carts 1 are connected is released, and the cross-direction wheels 42 in each transport cart 1 are grounded together with the four wheels 21 to the ground F.

Next, the operator moves each transport carriage 1 from the vicinity of the destination to the transfer position. At this time, the moving direction of the transport carriage 1 is regulated (guided) in the orthogonal traveling direction W by the cross direction wheel 42. Therefore, the movement of the transport carriage 1 in the orthogonal traveling direction W can be facilitated. Thereafter, the operator unloads the conveyed product 8 from the loading platform 2 of each conveyance cart 1.
When each transport carriage 1 is moved from the transfer position to the vicinity of the destination, it is possible to form a state in which the moving direction is restricted to the orthogonal traveling direction W by the cross direction wheel 42. Further, when the transport carriage 1 is towed from the vicinity of the destination to the vicinity of another destination by the towing vehicle 6, a state in which the moving direction is restricted to the front-rear traveling direction D by the front-rear wheel 41 can be formed.
Thus, according to the conveyance carriage 1 of this example, movement can be regulated (guided) in the two traveling directions of the forward / backward traveling direction D and the orthogonal traveling direction W, and the movement in the two traveling directions can be controlled. Can be easily.

In the transport carriage 1 of this example, the operation member 5 has a function of switching the switching member 3 between the first state 301 and the second state 302 and a function used for towing by the towing vehicle 6. By using the operation member 5, it is possible to facilitate each operation of switching the switching member 3 in the plurality of transport carts 1, connecting the plurality of transport carts 1, and pulling the connected transport carts 1.
Note that a plurality of front-rear wheels 41 and cross-direction wheels 42 may be provided on the lower surface of the loading platform 2.

DESCRIPTION OF SYMBOLS 1 Conveyance trolley 2 Loading platform 21 Wheel 22 1st rotation support shaft 23 2nd rotation support shaft 27 Engagement part 3 Switching member 301 1st state 302 2nd state 31 Rotation center part 321 End (one end) Part)
331 end (the other end)
41 Front-rear wheel 42 Cross-direction wheel 5 Operation member 501 Engagement state 502 Release state 51 Member engagement part 52 Traction engagement part 6 Traction vehicle 61 Engaged part 8 Transported object C Rotating axis F Ground D Front-rear traveling direction W Orthogonal direction of travel

Claims (5)

A transport carriage used for transporting a transported object,
A loading platform on which the transported goods are loaded;
At least four wheels provided on the cargo bed in a state of being rotatable about a vertical rotation axis;
A first state provided when the transport carriage moves in the front-rear direction, and a second state formed when the transport cart moves in a direction crossing the front-rear direction; A switching member that can be switched between two states;
A front-rear wheel that is provided on the switching member and rotates while being grounded together with the at least four wheels when the switching member is in the first state;
And a crossing wheel provided on the switching member and rotating in contact with the ground together with the at least four wheels when the switching member is in the second state. The switching member is configured to rotate around a rotation center portion in which a rotation center axis is directed in a horizontal direction to switch between the first state and the second state,
The said front-back direction wheel and the said cross direction wheel are provided in the position of the said switching member in the mutually opposite side on both sides of the said rotation center part in between. In the loading platform, an operation member having a member engaging portion that engages with the switching member at one end is rotatably provided.
At the other end of the operation member, when the transport carriage is towed by a towing vehicle, a towing mechanism that is engaged with the to-be-engaged portion provided on the loading platform of the towing vehicle or another transport cart. There is a joint,
The operation member includes an engagement state in which the traction engagement portion is engaged with the engaged portion and the switching member is rotated to the first state, and the engagement portion of the traction engagement portion. The transport carriage according to claim 2, wherein the engagement with the portion is released and the switching member can be switched to two states: a release state in which the switching member is rotated to the second state. The switching member is arranged on the cargo bed in a state of extending in the front-rear traveling direction,
One end of the switching member is engaged with the member engaging portion of the operation member,
When the operating member is switched from the engaged state to the released state, the other end of the switching member is in the other transport cart with respect to the engaged portion provided on the cargo bed of the transport cart. The transport cart according to claim 3, wherein the carriage is configured to release the engagement of the pulling engagement portion of the operation member.   5. The transport cart according to claim 1, wherein the front-rear wheel or the cross-direction wheel is disposed in a central portion of a region surrounded by the at least four wheels.

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