JP2014054926A - Platform cart with lateral roller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a platform cart with excellent workability, which enables a desired platform cart to be easily taken out from among a large number of platform carts arranged in longitudinal and lateral directions.SOLUTION: A platform cart includes a rectangular load carrying platform. A plurality of rollers capable of rotating on a rotating shaft perpendicular to a placement surface of the load carrying platform are provided on the first side surface of the load carrying platform. A second side surface on the other side of the first side surface, which is not provided with the rollers, serves as a receiving surface for receiving a plurality of rollers of another platform cart arranged adjacently to the second side surface.

Description

  The present invention relates to a flat carriage with side rollers.

  For example, when a large number of boxes are stored in a warehouse or the like, a group of boxes each having a plurality of stacked boxes may be arranged in rows and columns on the floor. When a desired box is to be taken out from such a large number of box groups, the box group placed in front of the box group including the box group to be taken out is pulled out one by one and placed in the back. In addition, the box group including the desired box body is taken out in order, and after taking out, the box group must be returned again in order, which requires a large amount of work and labor.

  In order to facilitate such work, for example, it is conceivable to arrange a group of boxes on a general flat carriage in multiple rows in the vertical and horizontal directions. With such a configuration, the box group placed directly on the floor can be moved with a small force as compared with the case of moving the box group, so that the work at a glance becomes easy. However, for example, when flat carriages are arranged closely without gaps to save space, the flat carriages to be moved rub against the flat carriages arranged in adjacent rows. Will be required. In addition, there is a problem that it collides with adjacent flat carts and disturbs the arrangement of the adjacent rows and eventually the flat carts as a whole.

  As a means for easily moving the box group without disturbing the arrangement of the box group in the adjacent row, it is conceivable to lay a plurality of conveyors extending in the vertical direction. However, in the conveyor, the frame portion takes up space, and the installation and removal work of the conveyor itself is troublesome. Further, it is inconvenient that the box group in the back cannot be taken out unless the box group in front is once lowered from the conveyor.

  Further, in any of the above-described forms, the same point is that the box group must be pulled out and returned one by one in order to take out the desired box group, and the work is troublesome.

  In order to improve such problems in the flat carriage, it is conceivable to connect the flat carriages in the vertical direction. In such a form, by pulling out the front flat cart, the flat carts arranged at the rear of the same row are pulled out together, so that it is not necessary to move the box group one by one. However, there is a problem that as the number of connected flat carts increases, the friction between adjacent flat carts when pulling out the flat cart becomes larger, and the force required for the work becomes excessive. Furthermore, there has been a demand to freely connect and release the flat cart while the box group is loaded on the flat cart, and the conventional flat cart still has room for improvement.

JP-A-8-26120

  The present invention has been completed based on the above circumstances, and is a flat carriage excellent in workability capable of easily taking out a desired flat carriage from a plurality of flat carriages arranged in the vertical and horizontal directions. Is intended to provide.

  A flat carriage with a side roller according to the present invention made to solve the above-mentioned problems comprises a rectangular loading platform, and a first side surface of the loading platform is centered on a rotation axis perpendicular to the loading surface of the loading platform. A plurality of rotatable rollers are provided, and the second side surface opposite to the first side surface is not provided with the roller and is disposed adjacent to the second side surface. The flat carriage is characterized in that it is a receiving surface for receiving the plurality of rollers.

  According to the present invention, for example, when a desired flat carriage is taken out from a plurality of flat carriages arranged in the same direction without gaps in the vertical and horizontal directions, the first side face and the second side face are opposed to each other. The adjacent flat carts arranged side by side can smoothly move the roller provided on the first side surface of one flat cart on the second side surface (receiving surface) of the other flat cart. That is, the relative movement of the flat carriage along the first side surface and the second side surface can be quickly performed with a small force, and workability is improved.

  In addition, on the cargo bed, at least one of the third side surface and the fourth side surface continuous with the first side surface and the second side surface, and the other flat carriage disposed adjacent to the side surface, It is good also as a structure which provides the connection mechanism for connecting. With such a configuration, it is possible to move a plurality of flat carriages in a state where the flat carriages are connected in a direction along the first side face and the second side face. Compared with a configuration in which the devices are moved one by one, the operation becomes easier. Moreover, since the movement of the flat carriage is performed for each row, the arrangement of the flat carriages in the adjacent row is not disturbed by hitting the flat carriage in the adjacent row.

  Further, when the release operation part for releasing the connection state of the connection mechanism is provided on the second side surface of the load bed, the flat carts can be connected to each other while the load is placed on the load bed. It can be canceled and is convenient.

  The connection mechanism includes, for example, a connection pin provided near the third side surface of the cargo bed and extending in a direction perpendicular to the mounting surface of the load bed, and a connection pin provided near the fourth side surface. And a receiving part that receives the

  Furthermore, the receiving portion may be configured to have an opening / closing piece that is expanded by being pressed by the connecting pin and is elastically restored and closed by an urging means after the connecting pin has passed.

  With such a configuration, when connecting the flat carts, it is more convenient because the connecting mechanism can be connected only by bringing the flat carts close to each other without the operator directly operating the connecting mechanism by hand.

  Further, the connecting pin is a connecting position that extends vertically from the third side surface when connecting the flat carriage, and is an accommodation position that is accommodated inside the third side surface when not in use. By adopting the configuration, the connecting pin does not jump out of the loading platform when not in use and is not in the way.

  Further, the second side surface of the loading platform may be a groove portion that can receive the plurality of rollers. With such a configuration, the relative movement between adjacent flat carriages becomes more stable.

Plan view of flat carriage of one embodiment Similarly bottom view A side view of a stack of multiple flat carts Similarly, a partially enlarged bottom view showing the state before connecting the flat carriage A partially enlarged bottom view showing the process of connecting flat trucks Similarly, a partially enlarged bottom view showing a state where a flat carriage is connected Similarly, a bottom view showing a state where a flat carriage is connected Plan view showing usage example of flat carriage Plan view showing the process of taking out the desired flat carriage The top view which shows the state which took out the desired flat carriage Bottom view showing the process of releasing the connection of the flat carriage Partially enlarged bottom view showing the process of disconnecting the flat carriage Partially enlarged bottom view showing the process of disconnecting the flat carriage The top view which shows the usage example of the flat trolley | bogie of other embodiment. Similarly, a plan view showing the process of taking out a desired plurality of flat carriages

  One embodiment will be described with reference to FIGS. FIG. 1 is a plan view of a flat carriage 10 with side rollers according to the present embodiment, FIG. 2 is a bottom view, and FIG. 3 is a side view showing a state in which a plurality of flat carriages are stacked.

(Configuration of flat carriage)
The flat carriage 10 has a rectangular plate-shaped carrier 11 made of synthetic resin such as polypropylene. In the present embodiment, among the pair of side surfaces extending in the longitudinal direction of the loading platform 11 and facing each other, the upper side surface in FIG. 1 is the first side surface 12, and the lower side surface is the second side surface 22. Of the other pair of side surfaces continuous with the side surface 12 and the second side surface 22, the left side surface in FIG. 1 is defined as a third side surface 32, and the right side surface is defined as a fourth side surface 42.

  As shown in FIGS. 2 and 3, the first side surface 12 has a first notch that is cut out in a substantially semicircular shape from the lower end edge in the thickness direction of the loading platform 11 toward the second side surface 22 side. Four portions 13 are formed at equal intervals, and the first cutout portion 13 has a rotation axis perpendicular to the placement surface 11A of the loading platform 11, and rotates about this rotation axis. Each possible synthetic resin roller 14 is installed.

  The roller 14 is attached to the pair of opposed surfaces 15A of the iron roller frame 15 having a U-shaped cross section by fixing both end portions of the rotation shaft, and the outer peripheral portion is between the pair of opposed surfaces 15A. The connecting surface 15B is configured to project outward from a rectangular relief hole 16 provided on the connecting surface 15B. The connecting surface 15B closes the opening on the first side surface 12 side of the first notch 13. Thus, it is installed in the downward direction in the thickness direction of the loading platform 11. The cutout height of the first cutout portion 13 is set to be larger than the thickness (width) of the roller 14 so that the roller 14 does not protrude downward from the lower surface of the loading platform 11 when the roller 14 is installed. It has become.

  On the other hand, the second side surface 22 opposite to the first side surface 12 is a flat surface as a whole, and receives the plurality of rollers 14 of the adjacent flat carts 10 so that the adjacent flat carts 10 are The receiving surface 24 is relatively movable along the two side surfaces 22. Near the fourth side surface 42 (right side in FIG. 1) of the second side surface 22, a second notch portion 23 that is cut out in a rectangular shape over the entire thickness direction of the loading platform 11 is formed. In addition, a release operation portion 71 of a release mechanism 70 described later is installed in the second cutout portion 23. The release operation unit 71 is formed in a size that covers the entire opening on the second side surface 22 side of the second cutout portion 23, and the surface on the second side surface 22 side (operation surface 71 </ b> A) is formed. It is set so as to be a flat surface continuous with the second side surface 22 in the natural state (during non-operation).

  A third cutout 33 is formed from the center of the third side surface 32 located on the left side in FIG. 1 to the first side surface 12 (upper side in FIG. 1). In the third cutout portion 33, a step surface 34 is provided on the center side of the third side surface 32 so as to be lowered by one step from the placement surface 11 </ b> A of the loading platform 11, while the first side surface 12 side is on the loading platform 11 side. 11 is cut out over the entire thickness direction. The step surface 34 is provided with a through hole 35 penetrating the back surface of the loading platform 11, and a rotation shaft 51 of a connecting pin 50 described later is installed in a state where it can rotate and is prevented from coming off. .

  Further, a wide fourth cutout 43 is formed at the center of the fourth side face 42 located on the right side in FIG. At both ends of the fourth cutout portion 43, a pair of stepped surfaces 44, 44 that are lowered by one step from the mounting surface 11 </ b> A of the loading platform 11 are provided to face each other, and the central portion is in the thickness direction of the loading platform 11. The receiving part 60 mentioned later is installed in the state cut out over the whole.

  As shown in the bottom view of FIG. 2, universal wheels 25 that can rotate 360 degrees are attached to the four corners of the bottom surface of the loading platform 11. Among these free wheels 25, a pair of free wheels 25 provided near the fourth side face 42 (right side in FIG. 2) is a pair of free wheels provided near the third side face 32 (left side in FIG. 2). Compared with 25, it is installed closer to the edge in the longitudinal direction of the loading platform 11. In addition, an accommodation concave portion 17 extending continuously in an L shape from the second cutout portion 23 to the fourth cutout portion 43 is provided on the lower surface of the loading platform 11. The housing recess 17 is provided so as to surround the universal wheel 25 provided in the vicinity of the corner between the second side surface 22 and the fourth side surface 42.

  In the third cutout portion 33 described above, a connecting pin 50 for connecting with another flat carriage 10 arranged adjacent to the third side surface 32 of the loading platform 11 is installed. The connecting pin 50 has a U-shape as a whole, and one end side is prevented from being removed by the snap ring 51A while leaving a clearance in the vertical direction from the upper side in the through hole 35 provided in the step surface 34 of the third notch 33. The other end side is a columnar engaging portion 52 that can be engaged with a receiving portion 60 described later. Further, the connecting portion 53 between the rotating shaft 51 and the engaging portion 52 has a plate shape.

  When the connecting pin 50 is used (when the flat carriage 10 is connected), the connecting pin 50 protrudes in the vertical direction from the third side surface 32 (two-dot broken line in FIG. 2) and is not used (not connected). 2), the connecting portion 53 is rotated to the third side surface 32 side around the rotation shaft 51 to be the accommodation position (the solid line and the broken line in FIG. 2) accommodated in the third notch 33. be able to. The stepped surface 34 is formed with a positioning recess 36 into which the connecting portion 53 is fitted so that the connecting pin 50 can be positioned in a state where the connecting pin 50 is in the connecting position and the receiving position.

  Further, the rotation shaft 51 of the connecting pin 50 is set so as to be movable in the through hole 35 in the axial direction by the height of the positioning recess 36. When the connecting pin 50 is rotated, it is lifted up and rotated. The connecting portion 53 is configured to be fitted into the positioning recess 36. The upper surface 53A of the connecting portion 53 is set to be equal to or less than the height of the mounting surface 11A of the loading platform 11 when the connecting pin 50 is lifted and rotated.

  On the other hand, as shown in FIG. 2, a receiving portion 60 and a release mechanism 70 are installed in the receiving recess 17. The receiving portion 60 engages with the above-described connecting pin 50 to connect the adjacent flat carts 10 to each other, and is provided at the end portion on the fourth notch portion 43 side in the housing recess 17. . Specifically, the receiving portion 60 includes a plate-like fixing piece 61 fixed so as to protrude into the fourth cutout portion 43 along the longitudinal direction of the loading platform 11, and the second of the fixing pieces 61. And an opening / closing piece 62 that is provided side by side along the side surface 22 side and holds the connecting pin 50 between the fixing piece 61.

  The fixing piece 61 is fixed by welding to a steel base 67 installed in the housing recess 17, and the fourth notch is formed so that the front end surface 61 </ b> A is substantially flush with the fourth side surface 42. It is in a state of protruding into the portion 43. On the other hand, the open / close piece 62 is made of a plate-like member that is longer than the fixed piece 61 and has an L-shaped cross section, and is bent at a right angle from the main body 63 and the main body 63 extending parallel to the placement surface 11A of the loading platform 11. And a hooking portion 64 extending downward. The opening / closing piece 62 is disposed so that the main body 63 is positioned on the fixed piece 61 side and the hooking portion 64 is positioned on the second side face 22 side. It is set as the state protruded in the 4th notch part 43 so that it may become the same surface as 61A. Further, the rear end extends to the vicinity of the end of the housing recess 17.

  The opening / closing piece 62 is inserted into a shaft hole 65 provided in the central portion in the longitudinal direction so that a rotating shaft 68 protruding in the vertical direction from the base 67 can be rotated by a snap ring 68 </ b> A while being prevented from coming off. Thus, it can be rotated along the mounting surface 11A of the loading platform 11. Further, the rotating shaft 68 has a step surface (not shown) on the base side, and the opening / closing piece 62 is placed on the step surface, whereby the opening / closing piece 62 and the base 67 are directly connected. There is no contact.

  Further, the distal ends of the fixed piece 61 and the opening / closing piece 62 are cut obliquely toward the mating surface of the both, and the engaging portions 52 of the connecting pins 50 of the flat carriage 10 arranged adjacent to each other are provided. Guide surfaces 61B and 62B for guiding between the two. Further, the mating surfaces of the two are notched in a semicircular shape following the guide surfaces 61B and 62B, respectively, and serve as receiving holes 66 for receiving and clamping the engaging portions 52 therebetween. In the receiving hole 66, when the engaging portion 52 is received, the fourth side surface 42 and the third side surface 32 of the flat carriage 10 arranged adjacent to each other are in abutment with each other. The formation position is set so as to be preferable.

  On the other hand, a release mechanism 70 for releasing the connected state with the adjacent flat carriage 10 is installed at the end of the accommodation recess 17 on the third notch 33 side. The release mechanism 70 is made of a steel plate-like release operation unit 71 disposed so as to block the opening on the second side surface 22 side of the second notch 23, and is integrated with the rear surface of the release operation unit 71. And a support bar 73 that is installed in the housing recess 17 and supports the press bar 72 so as to be movable in the axial direction. ing. The support plate 73 bends a rectangular flat plate into a convex shape and allows the pressing rod 72 to pass through a pair of rising surfaces. In addition, a tension spring 74 is provided to connect the end of the support plate 73 on the side of the opening / closing piece 62 and a hooking portion 64 on the rear end side of the opening / closing piece 62. Is always pulled to the support plate 73 side (upper side in FIG. 2). In other words, the distal end side of the opening / closing piece 62 is always biased toward the fixed piece 61 side.

  In the natural state shown in FIG. 2, the pressing rod 72 is in a position where one end side comes into contact with the opening / closing piece 62, and the other end side has such a length that the operation surface 71 </ b> A of the release operation portion 71 is flush with the second side surface 22. Is set. In addition, a snap ring 72A is provided on the opening / closing piece 62 side of the support bar 73 in the pressing bar 72 so as to prevent the pressing bar 72 from coming out to the release operation portion 71 side in a natural state. It has been.

  Further, as shown in FIG. 1, when the plurality of flat carriages 10 are stacked and accommodated near the corner portion of the loading surface 11 </ b> A of the loading platform 11, the free wheels 25 of the flat carriage 10 stacked on the upper side are positioned. A positioning recess 26 is formed so as to extend in the width direction of the loading platform 11 (vertical direction in FIG. 1). In the present embodiment, when a plurality of flat carts 10 are stacked, the first flat side surface of the loading platform 11, for example, in the vertical direction, as shown in FIG. 12 and the second side surface 22 are stacked in an overlapping direction, and the positioning recess 26 described above is provided at a position corresponding to the mounting position of each universal wheel 25 of the flat carriage 10 located on the upper side. ing.

  In addition, a gripping hole 27 that can be gripped when carrying the flat carriage 10 is provided at the center in the longitudinal direction near the second side surface 22 of the loading platform 11 so as to extend in the longitudinal direction of the loading platform 11. . Further, on the loading surface 11 </ b> A of the loading platform 11, a slip for suppressing the load loaded on the loading platform 11 from sliding down in the width direction is provided at the edge near the first side surface 12 and the second side surface 22. The retaining rib 28 is provided over substantially the entire area except for the holding hole 27 and the second notch 23 in the longitudinal direction of the loading platform 11.

(How to use a flat carriage)
Next, the usage method of the flat trolley | bogie 10 of this embodiment mentioned above is demonstrated. When the flat carriages 10 are connected, the two flat carriages 10 are arranged so that the rollers 14 are arranged side by side, and, as shown in FIG. The connecting pin 50 is rotated while being lifted up lightly to a connecting position where it protrudes in the vertical direction from the third side surface 32 of the loading platform 11, and is brought close to the receiving portion 60 of the other flat carriage 10. Then, the engaging portion 52 of the connecting pin 50 advances between the fixed piece 61 and the opening / closing piece 62 while being guided by the guide surfaces 61B, 62B of the receiving portion 60, and rotates the opening / closing piece 62 to push open (see FIG. 5). ) Enters the receiving hole 66. When the engaging portion 52 advances into the receiving hole 66, the opening / closing piece 62 pushed open by the connecting pin 50 is pulled by the tension spring 74 attached to the rear end side thereof, so that the opening / closing piece 62 is pushed back to the fixed piece 61 side. Thus, the fixed piece 61 and the open / close piece 62 are in a closed state (see FIG. 6). Thereby, the flat carriage 10 is brought into a connected state (see FIG. 7).

  Such operations are repeated, and a plurality of rows of a desired number of connected flat carts 10 are arranged. FIG. 8 is a plan view showing an example thereof, and shows a state in which three rows of flat carts 10 connected to each other are arranged in three rows. In the following description, the left-right direction in FIG. 8 is the vertical direction, the vertical direction is the horizontal direction, the left side is the front, and the right side is the rear.

  A box or the like is actually loaded on the plurality of flat carts 10 (not shown) and stored in, for example, a warehouse. When a desired box is taken out of these boxes, for example, when it is desired to carry out the box in the second row from the top of FIG. 8 and the first row from the left, first, the front of the second row from the top ( The flat carriage 10 at the left end is pulled forward (see FIG. 9). At this time, a plurality of rollers 14 are provided on one side surface (upper side in FIG. 9) of the flat carriage 10 in the second row from the top, and the opposing surface of the flat carriage 10 in the first row from the top is flat. The surface 24 is used. Further, the flat receiving surface 24 on the other side surface (the lower side in FIG. 8) of the flat carriage 10 in the second row from the top receives the roller 14 of the flat carriage 10 in the third row from the top. Adjacent flat carts 10 can smoothly move relative to each other, and the flat carts 10 can be quickly pulled out without requiring a large force. Further, since the flat carriages 10 are connected to each other in the vertical direction, the rows are not disturbed.

  When the desired flat carriage 10 is pulled out from the flat carriage 10 group, the connection to be disconnected is released by the release mechanism 70. At this time, even when the box is loaded on the loading platform 11, the release operation unit 71 is provided on the second side surface 22 of the loading platform 11, so that only the exposed release operation unit 71 is pressed. The connected state can be easily released (see FIG. 10).

  Specifically, when the connected state of the flat carriage 10 is released, as shown in FIGS. 11 and 12, the release operation unit 71 is pressed with, for example, a toe of a foot. Then, since the pressing bar 72 presses the rear end of the opening / closing piece 62, the opening / closing piece 62 rotates and the front end side is expanded, and in this state, the connected flat cart 10 is moved in a direction that is relatively separated. To release the connected state (see FIG. 13). When the release of the release operation unit 71 is released after the flat carriage 10 is separated, the rear end of the opening / closing piece 62 is pulled back to the original position by the tension spring 74, and the pressing rod 72 and the release operation unit 71 are also pulled back. The open / close piece 62 is pushed back to the original position (see FIG. 4). Thereafter, the disconnected connecting pin 50 is rotated to the third side face 32 side to be in the accommodation position.

  In addition, the box body on the separated flat carriage 10 can be moved together with the flat carriage 10.

  Alternatively, for example, when the used flat carriage 10 is released and disconnected, and then the holding hole 27 is held and carried, the operation of rotating the connecting pin 50 from the connecting position to the receiving position is omitted. be able to. That is, when the gripping hole 27 of the flat carriage 10 is gripped and lifted, the connecting pin 50 at the connecting position is automatically rotated by its own weight and is accommodated in the receiving position. Can be omitted. In addition, the connecting pin 50 of the flat carriage 10 being transported is not moved to the connecting position, which is safe.

(Effect of this embodiment)
As described above, according to the flat carriage 10 of the present embodiment, when the desired flat carriage 10 is taken out from the plurality of flat carriages 10 arranged in the same direction in the vertical and horizontal directions, the adjacent flat carriages 10 are The roller 14 and the receiving surface 24 can move relatively smoothly. In the case where the rollers 14 are provided on both sides of the flat carriage, the rollers 14 interfere with each other. Since the flat carriage 10 can be moved relatively with a small force without rattling, workability is improved.

  Further, since the flat carts 10 arranged in the vertical direction can be moved in a connected state, it is not necessary to move the flat carts 10 one by one, and the workability is further improved. In addition, when moving, it does not collide with adjacent flat carts and disturb the arrangement of flat carts.

  Further, when the flat carriage 10 is connected, it is only necessary to bring the flat carriages 10 close to each other with the connecting pin 50 as the connecting position. On the other hand, when the connected state is released, the release provided on the second side face 22 is released. It is only necessary to operate the operation unit 71. That is, it is convenient because the connection and release operations are easy and the operation can be performed while the load is placed on the loading platform 11. Further, since the connecting pin 50 is in the storage position when not in use, the connecting pin 50 does not jump out of the loading platform 11 and get in the way.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.

  (1) In the above-described embodiment, the roller 14 is provided on the lower end side of the first side surface 12. However, the installation height of the roller 14 is not limited to the above-described embodiment. It can be set as the structure installed in the center part in a height direction.

  (2) In the above embodiment, the flat carriage 10 is provided with four rollers 14 at equal intervals. However, the number and position of the rollers 14 are not limited to those in the above embodiment. For example, the edge of the first side surface It can be changed as appropriate, such as a configuration in which two pairs are provided closer to each other.

  (3) In the above-described embodiment, the configuration in which the second side surface 22 for receiving the roller 14 is a flat surface has been shown. However, for example, a groove-like portion extending in the longitudinal direction of the loading platform 11 at a height corresponding to the roller 14. As a result, the roller 14 may be more easily received.

  (4) In the above embodiment, the configuration in which the coupling mechanism (the coupling pin 50 and the receiving portion 60) for coupling the flat carriage 10 is shown, but the coupling mechanism is not necessarily required. Further, the configuration is not limited to the above embodiment, and for example, the configuration may be provided only on one side of the third side surface or the fourth side surface.

  (5) In the above-described embodiment, the release operation unit 71 for releasing the connection mechanism is provided on the second side surface 22, but the connection state may be released by directly operating the connection mechanism by hand. .

  (6) In the above embodiment, the connecting mechanism is provided near the center in the width direction of the loading platform 11 (close to the third side face 32 and the fourth side face 42). It is not restricted to a form, For example, you may provide in the edge part of a width direction, or a side surface.

  (7) In the above-described embodiment, an example in which only one flat carriage is separated has been shown. However, as shown in FIGS. 14 and 15, for example, a plurality of flat carriages can be separated and connected while moving. Also, when taking out the flat carriage in the center of the row, you can remove the front and rear connections of the flat carriage you want to take out, reconnect the remaining flat carriages, and take out, rearrange, add, etc. Can be done.

  (8) In the above embodiment, the rotation shaft 51 of the connecting pin 50 is set so as to be relatively easy to rotate with respect to the through-hole 35 of the loading platform 11, and the flat carriage 10 is held by holding the holding hole 27. The connection pin 50 is automatically rotated by its own weight when it is lifted so as to be accommodated in the accommodation position, but the rotation shaft 51 is set tightly so as to be press-fitted into the through-hole 35 and connected. The pin 50 may not be easily rotated and may be stably installed at the accommodation position or the coupling position.

  DESCRIPTION OF SYMBOLS 10 ... Flat trolley (Flat trolley with a side roller) 11 ... Loading platform 11A ... Mounting surface 12 ... 1st side surface 13 ... 1st notch part 14 ... Roller 17 ... Housing recessed part 22 ... 2nd side surface 23 ... 2nd Notch portion 24 ... Receiving surface 32 ... Third side surface 33 ... Third notch portion 42 ... Fourth side surface 43 ... Fourth notch portion 50 ... Connection pin (connection mechanism) 51 ... Rotating shaft 52 ... Engagement portion DESCRIPTION OF SYMBOLS 60 ... Reception part (connection mechanism) 61 ... Fixed piece 62 ... Opening / closing piece 66 ... Engagement part 70 ... Release mechanism 71 ... Release operation part 72 ... Pressing rod 73 ... Support plate 74 ... Tension spring (biasing means)

Claims (7)

A flat carriage provided with a rectangular carrier,
The first side surface of the loading platform is provided with a plurality of rollers capable of rotating around a rotation axis perpendicular to the loading surface of the loading platform, and the second side surface opposite to the first side surface is: A flat carriage with a side roller, which is not provided with the roller, and is a receiving surface for receiving the plurality of rollers of the other flat carriage arranged adjacent to the second side face. A flat carriage with side rollers according to claim 1,
The cargo bed is connected to at least one of the third side surface and the fourth side surface continuous with the first side surface and the second side surface and another flat carriage arranged adjacent to the side surface. A flat carriage with a side roller, which is provided with a connecting mechanism. A flat carriage with side rollers according to claim 2,
A flat carriage with side rollers, wherein a release operation part for releasing the connection state of the connection mechanism is provided on the second side surface of the loading platform. A flat carriage with side rollers according to claim 2 or claim 3,
The connection mechanism is provided near the third side surface of the loading platform and extends in a direction perpendicular to the loading surface of the loading platform, and is disposed near the fourth side surface and receives the connection pin. A flat carriage with a side roller, comprising a receiving part. A flat carriage with side rollers according to claim 4,
The receiving part is a flat carriage with a side roller having an opening / closing piece that is expanded by being pressed by the connecting pin and is elastically restored and closed by an urging means after the connecting pin passes. A flat carriage with a side roller according to claim 4 or 5,
The connecting pin is a connecting position that extends in the vertical direction from the third side surface when connecting the flat carriage, and is a receiving position that is stored inside the third side surface when not in use. Flat truck with rollers. A flat carriage with a side roller according to any one of claims 1 to 6,
A flat carriage with a side roller, wherein the second side surface of the cargo bed is a groove that can receive the plurality of rollers.

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