TWI687367B - Handling trolley - Google Patents

Abstract

The present invention provides a transporting trolley that can simplify the overall weight of the device trolley with a simple device configuration. The transport trolley of the present invention includes a wheel pair, a wheel frame, a lifting column, and a support link group. The wheel pair includes a first wheel and a second wheel. At least one wheel of the first wheel or the second wheel is composed of a driving wheel, which constitutes the first One end of the first column of the support link group is connected to the mounting portion of the first wheel of the first wheel frame, and the other end is connected to the first lifting column above the first wheel frame to form a second support One end of the second column support link of the link group is connected to the mounting portion of the second wheel of the first wheel frame, and the other end is connected to the second lifting column above the first wheel frame.

Description

Handling trolley

The present invention relates to a transport trolley having a lifting platform for transporting articles.

In recent years, in order to increase the transportation efficiency, it is desired to increase the moving speed of the transportation trolley for transporting articles. In addition, in order to increase the speed of movement of the transportation trolley, it is desirable to reduce the weight of the transportation trolley as a whole.

For example, the stacker crane (conveyor trolley) of Patent Document 1 is provided with a moment absorbing member on the main frame of a cage (elevating platform) to absorb the weight caused by the weight of the cargo. The bending moment generated by the deflection of the main frame of the cage prevents the side frame of the cage from tilting due to the deflection of the main frame of the cage. Thereby, it is not necessary to form the main frame and the side frames of the cage thickly. Therefore, the cage can be made lighter, and the overall stacker crane can be made lighter.

[Prior Art Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2008-81302

However, the stacker crane (handling trolley) of Patent Document 1 Lowering the platform) Light weight, only the weight of the cage (lifting platform) is reduced for the entire transport trolley, but it does not reach the frame (supporting) of the mast (lifting column) that supports the cage (lifting platform) Links are lightweight, and a frame (support link) that is thick enough to support the column (lifting column) is still required. Therefore, there is a problem that the weight of the frame (support link) becomes heavier, and as a result, the entire conveyance trolley becomes heavier.

Therefore, an object of the present invention is to provide a transport trolley that can make the overall weight of the device trolley lighter by constructing support links that support the lifting columns in a lightweight manner.

The problem to be solved by the present invention is the above. Next, means for solving the problem will be described.

That is, the conveyance trolley of the present invention has an article-elevating lifting table, and includes: a first wheel pair arranged along the vehicle body traveling direction; and a second wheel pair arranged parallel to the first wheel pair along the vehicle body traveling direction; The first wheel frame extends in the vehicle body travel direction to rotatably support the first wheel pair; the second wheel frame extends in parallel to the first wheel frame in the vehicle body travel direction and extends the The second wheel pair is rotatably supported; a pair of lifting columns are arranged between the first wheel frame and the second wheel frame along the vehicle body traveling direction, and are relatively to the first wheel frame and the first 2 The wheel frame extends vertically to guide the lifting platform to move up and down freely; the first support link group includes a plurality of first support links, and the first support link supports as the The first lifting column of a lifting column; And a second support link group, including a plurality of second support links, the second support link supporting a second lifting column that is the other lifting column of the pair of lifting columns; and, the first The wheel pair and the second wheel pair include: a first wheel arranged on the side of the first lifting column; and a second wheel arranged on the side of the second lifting column; the first wheel or the second wheel At least one wheel of the wheel is composed of a driving wheel; one end of any first support link constituting the first support link group is connected to the first of the first wheel frame or the second wheel frame 1 wheel mounting portion, and the other end is connected to the first lifting column above the first wheel frame or the second wheel frame; constituting any second of the second support link group One end of the support link is connected to the mounting portion of the second wheel in the first wheel frame or the second wheel frame, and the other end is connected to the first wheel frame or the second wheel The frame is connected to the second lifting column above.

In the above configuration, the weight of the first lifting column (second lifting column) is applied to the first wheel (the second wheel frame) of the first wheel frame (second wheel frame) via the first support link (second support link). The second wheel) mounting part.

The transfer trolley of the present invention includes the first wheel support member provided in the first wheel frame or the second wheel frame, and rotatably supports the first wheel; and the second A wheel support member provided on the first wheel frame or the second wheel frame to rotatably support the second wheel; and any first support link constituting the first support link group One end of which is connected to the mounting portion of the first wheel support member in the first wheel frame or the second wheel frame, and constitutes any second support link of the second support link group One end of is connected to the mounting portion of the second wheel support member in the first wheel frame or the second wheel frame.

In the above configuration, the weight of the first lifting column (second lifting column) is applied to the first wheel support in the first wheel frame (second wheel frame) via the first support link (second support link) The mounting part of the member (second wheel support member).

The transfer trolley of the present invention is the transfer trolley, in which one end of any first support link constituting the first support link group is connected to the first wheel frame or the second wheel frame and A position offset from the mounting portion of the first wheel in the vehicle body moving direction, and the other end is connected to the first lifting column above the first wheel frame or the second wheel frame; One end of any second support link of the second support link group is connected to the first wheel frame or the second wheel frame and travels in the direction of the vehicle body from the mounting portion of the second wheel The shifted position, and the other end is connected to the second lifting column above the first wheel frame or the second wheel frame.

In the above configuration, the connection position of the first support link (second support link) in the first wheel frame (second wheel frame) is dispersed in the vehicle body traveling direction, and the plurality of first support links are dispersed (The second support link) is connected between the first lifting column (second lifting column) and the first wheel frame (second wheel frame).

The transfer trolley of the present invention is the transfer trolley, wherein the first wheel frame and the second wheel frame are provided with openings in the side plates.

According to the transport trolley of the present invention, any one of the first support link group One end of the first support link (second support link) is connected to the mounting portion of the first wheel (second wheel) in the first wheel frame (second wheel frame), and the first support link ( The other end of the second support link is connected to the first lifting column (second lifting column) above the first wheel frame (second wheel frame). Therefore, the first lifting column (second lifting column) ) Weight is applied to the part that moves the transfer trolley (the part where the transfer trolley is in contact with the rail), so that the load applied to the member supporting the first lifting column (second lifting column) can be reduced. Therefore, the first support link (second support link) that supports the first lifting column (second lift column) can be made lighter, and the first link connecting the first support link (second support link) can be reduced The weight reduction of the wheel frame and the second wheel frame (it is not necessary to form the frame supporting the column support member and the frame supporting member with a thick member), and as a result, the entire transport trolley can be reduced in weight.

1: items

2: rail

10: Carrying trolley

11: 1st wheel pair

12: 2nd wheel pair

13: 1st wheel

14: 2nd wheel

15: axle

16: Drive motor

17: The first wheel support member

18: Second wheel support member

20: 1st wheel frame

21: 2nd wheel frame

22: Upper board

22a: Upper board

22b: Lower plate

23: side panel

24: Installation Department

25: opening

30: 1st lifting column

31: 2nd lifting column

32: Lifting table

34: Item transfer device

35: Lifting device

36: drive unit

37: driven unit

38: Lifting chain

40: The first support link group

41: 1st column support link (1st support link)

41a: Lower end of the 1st column support link

41b: Upper end of the 1st column support link

42: 1st column shake prevention link (1st support link)

42a: The first end of the first column is shaken to prevent the lower end of the connecting rod

42b: The upper end of the connecting rod is prevented from shaking

43A, 43B, 43C: 1st column twist prevention link (1st support link)

43a: One end of the first column twist prevention link (wheel frame side end)

43b: The other end of the first column twist prevention link (end of the lifting column side)

50: 2nd support link group

51: 2nd column support link (2nd support link)

52: 2nd column shake prevention link (2nd support link)

53A, 53B, 53C: 2nd column twist prevention link (2nd support link)

60: upper frame

FIG. 1 is a perspective view of the transport trolley of the present invention.

Fig. 2 is a side view of the transfer trolley of the present invention.

Fig. 3 is a front view of the transfer trolley of the present invention.

Fig. 4 is a plan view of the transfer trolley of the present invention.

FIG. 5 is an enlarged side view of the vicinity of the first wheel of the transport trolley of the present invention.

The transfer trolley 10 of the present invention will be described. In the following, the vehicle body moving direction of the transport trolley 10 (the longitudinal direction of the transport trolley 10) is referred to as front and rear The horizontal direction (the width direction of the conveying trolley 10) with respect to the moving direction of the vehicle body of the conveying trolley 10 is set as the left-right direction, and the moving direction of the vehicle body with respect to the conveying trolley 10 is the vertical direction The orthogonal direction (the height direction of the transport trolley 10) will be described as an up-down direction.

The transfer trolley 10 is installed in, for example, an automatic warehouse (not shown) for racks (not shown) that are arranged to face each other across rails 2 (FIGS. 2 and 3) of the rail for transferring the trolley 10 (Shown), to store the article 1 transported by the transport trolley 10.

As shown in FIGS. 1 to 4, the transfer trolley 10 is supported by the rail 2. The transport trolley 10 includes a first wheel pair 11 and a second wheel pair 12 that are rotatable on the rail 2.

The first wheel pair 11 and the second wheel pair 12 include a pair of wheels, and the pair of wheels includes a first wheel 13 and a second wheel 14. In the first wheel pair 11 and the second wheel pair 12, the first wheel 13 and the second wheel 14 are arranged linearly in the front-rear direction (along the vehicle body traveling direction of the transfer trolley 10). The first wheel pair 11 and the second wheel pair 12 are arranged such that the first wheels 13 and the second wheels 14 are parallel to each other and their axles 15 are on the same straight line.

The first wheel 13 is disposed on one end side of the transfer cart 10 (the side of the first lifting column 30 described later). The second wheel 14 is disposed on the other end side of the transfer cart 10 (the second lifting column 31 side described later). At least one wheel of the first wheel 13 or the second wheel 14 is a driving wheel, and is connected to a driving motor (motor) 16. Then, at least one wheel of the first wheel 13 or the second wheel 14 is rotated by driving of the drive motor 16.

As shown in FIGS. 1 to 4, the transfer trolley 10 mainly includes a wheel frame 20, a wheel frame 21, a lifting column 30, a lifting column 31, an upper frame 60, and a lifting platform 32.

In the conveyance trolley 10, a pair of wheel frames 20 and wheel frames 21 formed in the front-rear direction (along the vehicle body conveyance direction of the conveyance trolley 10) are arranged parallel to each other in the left-right direction. Between the wheel frame 20 and the wheel frame 21 arranged in parallel, a pair of lifting columns 30 and 31 are arranged in the front-rear direction (along the vehicle body transport direction of the transport trolley 10). In addition, the upper ends of the lifting columns 30 and 31 are connected by the upper frame 60, and the lifting platform 32 is guided between the lifting columns to freely move up and down.

The first wheel frame 20 is a frame extending in the front-rear direction of the transfer cart 10 and rotatably supporting the first wheel pair 11. The first wheel frame 20 supports the first wheel 13 and the second wheel 14 at both ends thereof.

The second wheel frame 21 is a frame that extends parallel to the first wheel frame 20 in the left-right direction in the front-rear direction of the transfer cart 10 and rotatably supports the second wheel pair 12. The second wheel frame 21 supports the first wheel 13 and the second wheel 14 at both ends thereof.

The wheel frame 20 and the wheel frame 21 are arranged at a predetermined interval (specifically, the interval substantially the same as the interval of the rail 2). The wheel frame 20 and the wheel frame 21 include: an upper plate 22 forming the upper surfaces of the wheel frame 20 and the wheel frame 21; and a side plate 23 forming the side surfaces of the wheel frame 20 and the wheel frame 21. The upper plate 22 and the side plate 23 are formed by members bent from both ends toward the center, and both ends are higher than the center.

As shown in FIG. 5, the upper plates 22 of the wheel frame 20 and the wheel frame 21 include two plate-shaped members including an upper plate 22 a and a lower plate 22 b to support the first wheel 13 or the second wheel 14 at both ends of the wheel frame . Moreover, by the upper plate 22 (the upper plate 22a, The lower plate 22b) and the side plate 23 form an attachment portion 24 for attaching the first wheel 13 or the second wheel 14.

The first wheel support member 17 (second wheel support member 18) that supports the first wheel 13 (second wheel 14) is attached to the attachment portion 24. The upper ends of the wheel support members 17 and 18 are attached to the lower plate 22b of the upper plate 22, and rotatably support the axle 15 of the first wheel 13 (second wheel 14) at the lower end.

As shown in FIGS. 1 and 2, the side plate 23 is provided with a circular opening 25 that opens in a predetermined size. The opening 25 is of a size sufficient to maintain the rigidity of the side plate 23.

As shown in FIGS. 1 to 4, the lifting column 30 and the lifting column 31 extend vertically with respect to the wheel frame 20 and the wheel frame 21. The lifting column 30 and the lifting column 31 are arranged at the center between the first wheel frame 20 and the second wheel frame 21 and on the same straight line along the front-rear direction of the transport trolley 10 at both ends of the transport trolley 10.

Between the first elevating column 30 and the second elevating column 31, an elevating platform 32 for elevating and lowering the article 1 is provided. The lifting table 32 is provided with an article transfer device 34 for transferring articles 1 on its upper surface. The article transfer device 34 is constituted by a fork-type transfer device that has a fork for placing and supporting the article 1 so as to move forward and backward.

The lifting column 30 and the lifting column 31 are provided with a lifting device 35 to lift the lifting platform 32. The lifting device 35 mainly includes: a drive unit (unit) 36 provided at the lower end of the lifting column 30 and the lifting column 31; a driven unit 37 provided at the upper end of the lifting column 30 and the lifting column 31; and a lifting chain (chain) 38, rotatably erected between the driving unit 36 and the driven unit 37.

As shown in FIGS. 1 to 4, a support link group 40 and a support link group 50 are connected to the lift column 30 and the lift column 31. The lifting column 30 and the lifting column 31 are supported by the wheel frame 20 and the wheel frame 21 via the support link group 40 and the support link group 50.

The first support link group 40 is a link group connected between the first lifting column 30 and the first wheel frame 20 or the second wheel frame 21. The first support link group 40 mainly includes a first column support link 41 (an example of the "first support link"), a first column shake prevention link 42 (an example of the "first support link"), and a first One column torsion preventing link 43A, first column torsion preventing link 43B, and first column torsion preventing link 43C (an example of "first support link").

The first column support link 41 is a link that supports the first lifting column 30. The first column support link 41 supports the first lifting column 30 from the left-right direction of the transfer trolley 10 (the width direction of the transfer trolley 10 ). One end (lower end 41a) of the first column support link 41 is connected to the upper plate 22a of the upper plate 22 of the first wheel frame 20 or the second wheel frame 21 and is attached to the first wheel 13 at the other end (The upper end portion 41b) is connected to the first lifting column 30 above the first wheel frame 20 or the second wheel frame 21.

The first column shaking prevention link 42 is a link that prevents the first lifting column 30 from shaking when the transport trolley 10 moves. Specifically, the first column shaking prevention link 42 prevents the first lifting column 30 from shaking in the front-rear direction of the transport trolley 10. One end portion (lower end portion 42a) of the first column shake prevention link 42 is connected to the upper plate 22a of the upper plate 22 of the first wheel frame 20 or the second wheel frame 21 and is transported from the mounting portion 24 of the first wheel 13 The front-back direction of the trolley 10 (first wheel frame 20 or second wheel frame 21 Of the central part). That is, the lower end portion 42a of the first column swing prevention link 42 is installed in the front-rear direction of the transport trolley 10 (the center portion side of the first wheel frame 20 or the second wheel frame 21) from the installation position of the first column support link 41 ) Offset position. In addition, the other end (upper end 42 b) of the first post-sway prevention link 42 is connected above the first wheel frame 20 or the second wheel frame 21 and is attached to the upper end 41 b of the first post support link 41. The first lifting column 30 located below.

The first column torsion preventing link 43A, the first column torsion preventing link 43B, and the first column torsion preventing link 43C prevent the first lifting column 30 from torsion (rotation) while maintaining the first wheel frame 20 and the second wheel The link of the width of the frame 21 (the width of the transport trolley 10). The first column torsion preventing link 43A, the first column torsion preventing link 43B, and the first column torsion preventing link 43C support the first elevating column 30, the first wheel frame 20, and the second wheel in the left-right direction of the transport trolley 10 Frame 21.

One end portion (wheel frame side end portion 43a) of the first column twist prevention link 43A is connected to the upper plate 22a of the upper plate 22 of the first wheel frame 20 or the second wheel frame 21. In addition, the other end portion of the first column twist prevention link 43A (the lifting column side end portion 43b) is divided into two strands, and is connected to the lower end portion of the first lift column 30 so that the first column twist prevention link 43A becomes horizontal .

One end portion (wheel frame side end portion 43a) of the first column twist prevention link 43B is connected to the upper portion of the side plate 23 of the first wheel frame 20 or the second wheel frame 21, and the other end portion (lifting column side end portion 43b) It is connected to the lower end portion of the first elevating column 30 and is positioned below the other end portion (elevating column side end portion 43b) of the first column twist prevention link 43A.

One end (wheel frame side end 43a) of the first column twist prevention link 43C is connected to the upper plate 22a of the upper plate 22 of the first wheel frame 20 or the second wheel frame 21, and the other end (lifting column side end The portion 43b) is connected to the lower end portion of the first lifting column 30 and is located below the mounting position of the other end portion (the lifting column side end portion 43b) of the first column twist prevention link 43A. That is, the first column twist prevention link 43C is inclined toward the first lifting column 30 side by attaching the other end (lifting column side end 43b) to a position lower than one end (wheel frame side end 43a). .

The second support link group 50 is a link group connected between the second lifting column 31 and the first wheel frame 20 or the second wheel frame 21. The second support link group 50 mainly includes a second column support link 51 (an example of "second support link"), a second column shake prevention link 52 (an example of "second support link"), and a second The two-post twist prevention link 53A, the second post twist prevention link 53B, and the second post twist prevention link 53C (an example of the "second support link"). In addition, the configuration of the second column support link 51, the second column shake prevention link 52, the second column twist prevention link 53A, the second column twist prevention link 53B, and the second column twist prevention link 53C 1 The first column support link 41 of the support link group 40, the first column shake prevention link 42, the first column twist prevention link 43A, the first column twist prevention link 43B, and the first column twist prevention link 43C is the same, so description is omitted.

As shown in FIGS. 1 to 4, the left-right direction of the first lifting column 30 is supported by a pair of first column support links 41. Specifically, the upper end 41 b of the pair of first column supporting links 41 sandwiches the first lifting column 30 from the left and right directions, whereby the first lifting column 30 is supported by the first column supporting link 41. Here, by clamping the first lifting column 30 The lower end portion 41 a of the first column support link 41 is connected to the mounting portion 24 of the first wheel 13, and the weight of the first lifting column 30 is applied to the upper portion of the first wheel 13. As a result, the weight of the first lifting column 30 can be applied to the portion where the transporting trolley 10 is moved (the portion where the transporting trolley 10 is in contact with the rail 2), so that the load applied to the first column supporting link 41 can be reduced.

In addition, the front-rear direction of the first lifting column 30 is supported by a pair of first column shaking prevention links 42. Specifically, the upper end portion 42b of the pair of first post swinging links 42b that is connected by shifting the lower end portion 42a from the mounting portion 24 of the first wheel 13 toward the central portion of the first wheel frame 20 prevents the upper end portion 42b of the link 42 from By sandwiching the first lifting column 30 in the left-right direction, the first lifting column 30 is supported by the first column shaking prevention link 42. The first post-sway prevention link 42 is connected by shifting the lower end portion 42a from the lower end portion 41a of the first post support link 41 toward the center of the first wheel frame 20 or the second wheel frame 21 to prevent the first 1 Shake of the lifting column 30 in the front-rear direction.

In addition, the twisting direction of the first lifting column 30 is supported by a pair of first column twist prevention links 43A, first column twist prevention links 43B, and first column twist prevention links 43C. Specifically, the pair of first column twist prevention links 43A and the first column twist prevention links 43B have the lifting column side end portions 43b sandwiching the lower end portion of the first lifting column 30 from the left and right directions, and the pair of first The lifting column side end portion 43b of the column twist prevention link 43C clamps the lower end portion of the first lifting column 30 in the left-right direction from diagonally upward, whereby the first lifting column 30 is rotated by the first column twist prevention link 43A, the first The column twist prevention link 43B and the first column twist prevention link 43C are supported.

Similarly, the left-right direction of the second lifting column 31 is supported by a pair of second columns The link 51 is supported, and the front-back direction is supported by a pair of second post swing prevention links 52, and the twist direction is supported by the second post twist prevention link 53A, the second post twist prevention link 53B, and the second post twist prevention link 53C . The specific supporting method is the same as that of the first lifting column 30, so the description is omitted.

In this way, since the weight of the first lifting column 30 (second lifting column 31 ), the transport trolley 10 passes through the first column supporting link 41 (second column) of the first supporting link group 40 (second supporting link group 50) Supporting link 51) is applied to the mounting portion 24 (first wheel support member 17 (second wheel support member 18) of the first wheel 13 (second wheel 14) in the first wheel frame 20 (second wheel frame 21) )), so that the weight of the first lifting column (second lifting column) can be applied to the portion where the transport trolley 10 moves (the portion where the transport trolley 10 and the rail 2 are in contact). Therefore, the load applied to the first column support link 41 (second column support link 51) can be reduced, and the overall weight of the first support link group 40 (second support link group 50) can be reduced. The overall weight of the first wheel frame 20 (second wheel frame 21) connecting the first support link group 40 (second support link group 50) is reduced (it is not necessary to form the first support link group 40 (thick 2) The support link group 50) and the first wheel frame 20 (second wheel frame 21)). As a result, the entire transport vehicle 10 can be made lighter.

In the transport trolley 10, the first wheel frame 20 (second wheel frame 21) is connected to the first wheel frame 20 by the connection position of the first column swing prevention link 42 (second column swing prevention link 52). The center side of the second wheel frame 21) (the front-rear direction of the transport trolley 10) is shifted to prevent the first lifting column 30 (second lifting column 31) from moving forward and backward (the vehicle body moving direction) when the transport trolley 10 moves shake.

In the conveyance trolley 10, by providing the opening 25 in the side plate 23 of the first wheel frame 20 (second wheel frame 21), the first wheel frame 20 (second wheel frame 21) can be reduced in weight.

In addition, in the present embodiment, the transport trolley 10 is a trolley that travels on the rail 2, but it is not limited to this, as long as it is a transport trolley that has a lifting platform for transporting articles, it can also be a trolley that travels on the ground.

In the present embodiment, the two plate-like members of the upper plate 22a and the lower plate 22b constitute both ends of the wheel frame 20 and the wheel frame 21, but it is not limited thereto, as long as it can support the first wheel 13 or the second The structure of the wheel 14 may also be formed by a thick plate-shaped member.

In this embodiment, the side plate 23 of the first wheel frame 20 (second wheel frame 21) is provided with an opening 25, but as long as the rigidity of the side plate 23 of the first wheel frame 20 (second wheel frame 21) can be ensured, then The position, size, range, opening shape, etc. of the opening 25 are not limited to the opening 25 of this embodiment.

In this embodiment, three left and right first post twist prevention links 43A, first post twist prevention links 43B, and first post twist prevention links 43C (second post twist prevention links 53A, second post twist prevention links The rod 53B and the second column twist prevention link 53C) prevent the twisting (rotation) of the first lifting column 30 (the second lifting column 31), but it is not limited to this as long as the first lifting column 30 (the first 2) The twisting (rotating) of the lifting column 31) can also be performed by using a left and right first column to prevent twisting.

1: items

10: Carrying trolley

11: 1st wheel pair

12: 2nd wheel pair

13: 1st wheel

14: 2nd wheel

15: axle

16: Drive motor

17: The first wheel support member

18: Second wheel support member

20: 1st wheel frame

21: 2nd wheel frame

22: Upper board

23: side panel

25: opening

30: 1st lifting column

31: 2nd lifting column

32: Lifting table

34: Item transfer device

35: Lifting device

36: drive unit

40: The first support link group

41: 1st column support link (1st support link)

42: 1st column shake prevention link (1st support link)

43A, 43B, 43C: 1st column twist prevention link (1st support link)

50: 2nd support link group

51: 2nd column support link (2nd support link)

52: 2nd column shake prevention link (2nd support link)

53A, 53C: 2nd column twist prevention link (2nd support link)

60: upper frame

Claims (5)

A transporting trolley having a lifting platform for transporting an article, and the transporting trolley includes: a first wheel pair, which is arranged along a vehicle body traveling direction; a second wheel pair, which is parallel to the first wheel pair, along a vehicle body traveling direction Configuration; The first wheel frame extends along the vehicle body travel direction, rotatably supporting the first wheel pair; The second wheel frame extends parallel to the first wheel frame along the vehicle body travel direction, and The second wheel pair is rotatably supported; a pair of lifting columns are arranged between the first wheel frame and the second wheel frame along the vehicle body travel direction, and are relative to the first wheel frame and the The second wheel frame extends vertically to guide the lifting platform to move up and down freely; The first support link group includes a plurality of first support links, and the first support link supports the pair of lifting columns The first lifting column of a lifting column in; and the second support link group, including a plurality of second support links, the second support link supporting the other lifting column of the pair of lifting columns A second lifting column, and the first wheel pair and the second wheel pair include: a first wheel arranged on the side of the first lifting column; and a second wheel arranged on the side of the second lifting column, At least one wheel of the first wheel or the second wheel is composed of a driving wheel, and one end of any first support link constituting the first support link group is connected to the first wheel frame or The mounting portion of the first wheel in the second wheel frame, and the other end is connected to the first lifting column above the first wheel frame or the second wheel frame to constitute the first 2 One end of any second support link of the support link group is connected to the mounting portion of the second wheel in the first wheel frame or the second wheel frame, and the other end is closer to the The first wheel frame or the second wheel frame is connected to the second lifting column above. The conveyance trolley according to item 1 of the patent application scope includes: a first wheel support member provided on the first wheel frame or the second wheel frame to rotatably support the first wheel; and 2 wheel support members provided on the first wheel frame or the second wheel frame, rotatably supporting the second wheel, and constituting any first support link of the first support link group One end of which is connected to the mounting portion of the first wheel support member in the first wheel frame or the second wheel frame, and constitutes one end of any second support link of the second support link group The portion is connected to the attachment portion of the second wheel support member in the first wheel frame or the second wheel frame. The transfer trolley according to item 1 or item 2 of the patent application scope, wherein one end of any first support link constituting the first support link group is connected to the first wheel frame or the first 2 wheel frames at a position offset from the mounting portion of the first wheel in the vehicle body moving direction, and the other end is connected to the first wheel frame above the first wheel frame or the second wheel frame 1 lifting column; one end portion of any second support link constituting the second support link group is connected to the first wheel frame or the second wheel frame and is attached to the mounting portion of the second wheel The other end is connected to the second lifting column above the first wheel frame or the second wheel frame at a position offset in the vehicle body travel direction. The transfer trolley according to item 1 or 2 of the patent application, wherein the first wheel frame and the second wheel frame are provided with openings in the side plates. The transfer trolley according to item 1 or item 2 of the patent application scope, wherein one end of any first support link constituting the first support link group is connected to the first wheel frame or the first 2 wheel frames at a position offset from the mounting portion of the first wheel in the vehicle body moving direction, and the other end is connected to the first wheel frame above the first wheel frame or the second wheel frame 1 lifting column; one end portion of any second support link constituting the second support link group is connected to the first wheel frame or the second wheel frame and is attached to the mounting portion of the second wheel A position offset in the vehicle body moving direction, and the other end is connected to the second lifting column above the first wheel frame or the second wheel frame; and the first wheel frame and the The second wheel frame is provided with an opening in the side plate.

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