JP2005349853A - Towing device of conveying truck - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a towing device which is easily mounted and used when towing a conveying truck. <P>SOLUTION: The towing device comprises a supporting member 7 mounted on a lower side of a bottom frame 3a at an end in the towing direction side of a conveying truck 1, and a towing tool 8 attachable/detachable to/from the supporting member 7. A transverse supporting shaft 20 in the right-to-left direction is provided on one end of the towing tool 8, and a supporting hole 15 in the vertical direction with the supporting shaft 20 of the towing tool 8 fitted therein is formed in the supporting member 7, and a supporting shaft receiving/delivering opening 15a which is bent and opened in the towing direction side is formed in an upper end of the supporting hole 15. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention is provided with a traction device for a conveyance carriage that can be used when the conveyance carriage is towed by a towing vehicle or when the conveyance carriages are connected in a train shape, and has a traction tool that can be removed when not particularly needed. It relates to a towing device.

As described above, those described in Patent Documents 1 and 2 are known as a traction device provided with a traction tool that can be removed so as not to disturb when not in use. In the device described in Patent Document 1, a bearing member that pivotally supports a traction tool so as to swing up and down is detachably engaged with a support member protruding from a front portion of a bottom frame of a transport carriage from above. When the traction tool is rotated to the forward horizontal orientation, the locking piece provided at the base of the traction tool engages with the support member, and the traction tool disengages upward with respect to the support member. In the device described in Patent Document 2, the hook portion provided at the base portion of the traction tool is provided so as to close the opening side of the hook portion with a spring force. With the locking piece switched to the unlocking position, it is fitted from above onto a support member (a U-shaped bracket) protruding from the front of the bottom frame of the transport carriage, and then the locking piece is By moving it back to its original position with spring force, The traction devices are those that are configured to be capable of binding to freely swing upward and downward to the support member (U-shaped bracket).
JP-A-6-87308 Japanese Utility Model Publication 4-104004

  As described above, the conventional traction device described in Patent Documents 1 and 2 that can detach the traction tool from the transport carriage when not needed has the following problems. That is, in any traction device, the support member attached to the front portion of the transport carriage (the end portion of the bottom frame in the pull direction) is provided so as to protrude forward from the front end of the transport cart. Even if the tool is removed, the support member remains in a state of protruding from the front part of the transport carriage. Therefore, when multiple transport carriages are arranged adjacent to each other, or nested in a plan view, When nesting possible types of transport carts, the support member becomes in the way, and the transport carts cannot be brought into close contact with each other. In addition, there is a high risk that the support member with the traction tool removed may be deformed or damaged due to a collision with another object.

  In order to solve the above-described problems, the support member is provided below the end of the bottom frame of the transport carriage on the traction direction side so as not to protrude forward from the front part of the transport carriage. However, when this configuration is adopted in the configurations described in Patent Documents 1 and 2, the bearing member and the hook portion of the traction tool are engaged with the support member provided below the end portion of the bottom frame. When it is necessary to insert the traction tool into the lower side of the end of the bottom frame in a posture that is almost horizontally tilted as in use, the operator holding the traction tool bends and sits under the bottom of the transport carriage. It is necessary to take an unnatural posture to look into, and not only the workability is remarkably lowered, but also the physical burden on the worker is increased.

  An object of the present invention is to provide a trolley for a carriage for transportation that can solve the conventional problems as described above, and the means thereof is shown with reference numerals of embodiments to be described later. The support member 7 attached to the bottom of the end portion of the transport carriage 1 on the pulling direction side (the lower frame 3a of the front side panel 3), and the pulling tool 8 that is detachable from the support member 7 The traction tool 8 is provided with a horizontal support shaft 20 at one end thereof, and the support member 7 is provided with a vertical support hole 15 into which the support shaft 20 of the traction tool 8 is fitted. The support hole 15 is provided with a support shaft insertion / removal opening 15a that is bent and opened in the pulling direction at the upper end of the support hole 15.

  Specifically, as to the second aspect of the present invention, the extension device 21 extends from the support shaft 20 in a direction opposite to the pulling direction. The traction tool 8 in a state where the support shaft 20 is supported by the lower end of the support hole 15 is rotated on the support member 7 so that the end on the traction direction side rotates in the downward direction. The stopper part 14 blocked | prevented by contact | abutting with the part 21 can be provided.

  In addition, as described in claim 3, the traction tool 8 is configured such that a side view shape thereof is a reverse convex shape, and a traction direction is determined from an intermediate bent portion position of the traction tool 8. The support shaft 20 can be arranged at a position separated in the opposite direction.

  When the extension part 21 according to claim 2 is provided in the traction tool 8, the traction tool 8 is connected to each other by fixing both ends of the support shaft 20 as described in claim 4. The left and right vertical bar-like members 16 are provided, and the extending portion 21 is formed by a portion of the left and right vertical bar-like members 16 extending from the support shaft 20 in the direction opposite to the pulling direction. The member 7 includes a pair of left and right side plates 11 adjacent to the inside of the left and right vertical bars 16 and formed with the support holes 15, a connecting plate material 12 that connects and integrates the left and right side plates 11 to each other, A rear side plate 13 projecting laterally laterally from the left and right side plates 11 on the rear side of the left and right side plates 11, and the stopper portion 14 can be formed on the lower side of both end projections of the rear side plate 13. .

  Furthermore, as described in claim 5, the horizontal frame is supported below the bottom frame (the lower frame 4a of the rear side panel 4) at the end opposite to the pulling direction of the transport carriage 1. A connecting member 10 that is swingably mounted around a shaft 25 is provided, and the connecting member 10 is rotated backward and upward around the support shaft 25 to be opposite to the pulling direction of the transport carriage 1. A connecting hole 26 is provided at the tip projecting rearward from the end of the shaft, and a to-be-connected hole 17 that matches the connecting hole 26 is provided at the tip of the traction tool 8. It can comprise so that the conveyance trolley | bogies 1 can be connected via the connecting pin 23 penetrated.

  Further, as described in claim 6, a locking means 27 that locks the traction tool 8 in a standing posture by rotating upward around the support shaft 20 can be used together.

  According to the trolley pulling device of the present invention configured as described above, the support member for attaching the traction tool to the transfer trolley is provided below the bottom frame at the end of the trolley in the pulling direction side. Therefore, in a state where the traction tool is detached from the support member of the transport carriage, there is no one that protrudes from the end of the bottom frame of the transport carriage on the traction direction side. Therefore, when arranging a plurality of transporting carts adjacent to each other or when nesting a transporting cart of a type that can be nested in a plan view, the support member becomes an obstacle and the transporting carts are There is no inconvenience that the two cannot be brought into close contact with each other.

  Moreover, when attaching the traction tool to the support member provided below the bottom frame at the end of the trolley in the traction direction side, in the state where the traction tool is gripped in the vertical direction with its support shaft down, The support shaft may be inserted into a support shaft insertion / extraction opening bent and opened to the pulling direction side of the upper end of the support hole so that the support shaft is dropped into the support hole in the vertical direction of the support member. The worker who installs the tool does not need to take an unnatural posture such as bending down and looking down under the bottom of the carriage. Therefore, the attaching / detaching operation of the traction tool can be performed easily and easily, the workability can be improved, and the physical burden on the operator can be reduced.

  According to the second aspect of the present invention, the traction tool attached to the support member on the transport carriage side through the support shaft on the traction tool side as described above is substantially horizontal in the traction direction. Can be held in an extended position. Therefore, it is possible to easily perform the operation of connecting the leading end portion of the traction tool to the connecting member provided at the rear portion (the end portion opposite to the traction direction) of the traction vehicle or other transport carriage. In addition, even if the support shaft on the side of the traction tool moves upward in the support hole of the support member due to impact or vibration during traction acting on the traction tool in use, the movement of the traction tool This can be prevented by the contact between the extension portion on the side and the stopper portion on the support member side, and the attachment state of the traction tool can be maintained reliably and satisfactorily.

  According to the configuration of claim 3, the position of the support shaft when the region on the side of the tip of the traction tool (the end on the traction direction side) is raised substantially vertically from the position of the intermediate bending portion of the traction tool. Can project to one side of the vertical surface including the tip side region of the traction tool. That is, when the support shaft included in the traction tool is fitted into the support shaft insertion / extraction opening of the support hole of the support member on the transport carriage side, in other words, in a state where the tip portion of the traction tool in a substantially vertical posture is gripped. The support shaft can be easily fitted into the support shaft loading / unloading opening without grasping the pulling tool in an inclined position. Therefore, the attaching operation of the traction tool can be easily and easily performed with a more comfortable posture.

  Moreover, when providing the extension part of Claim 2 in a traction tool, according to the structure of Claim 4, it forms with the left-right pair of extension part by the side of a traction tool, and the back side board of the support member side. The contact with the stopper portion allows the traction tool attached to the support member to be held in a substantially horizontal posture in a stable state without tilting in the lateral direction. Further, the support member can also be configured to have a sufficient strength.

  Furthermore, according to the structure of Claim 5, when connecting conveyance trolleys in a train shape with a traction tool, the connection member required for the edge part on the opposite side to the traction direction of a conveyance trolley is not used. Sometimes it does not protrude rearward from the carriage, so as explained above, when a plurality of carriages are arranged adjacent to each other, or in a type that can be nested in a plan view When nesting trolleys, it is possible to eliminate the inconvenience that the connecting members are in the way and the carriages cannot be brought into close contact with each other. And when connecting the said connection member and the front-end | tip part of the traction tool of a back conveyance trolley, it is connected to the state of the said connection member rotated to back upper direction and protruded back from the rear-end part of the conveyance trolley | bogie. Since the hole and the to-be-connected hole at the tip of the traction tool can be coupled with a linking pin, it is possible to easily connect the transport carts using the traction tool.

  Furthermore, according to the configuration of the sixth aspect, when the traction tool is not used temporarily, or when the transport carriage attached with the traction tool is moved to a place where the traction tool is used, the traction tool is used. Since it can be locked in the standing posture, the transport cart in this state can be moved safely and easily.

  A specific example of the present invention will be described below with reference to the accompanying drawings. A transport cart 1 shown in FIGS. 1 and 2 is an example of a transport cart in which the traction device of the present invention is incorporated in this embodiment. In addition, the plane rectangular loading platform 2, the front side panel 3 and the rear side panel 4 arranged along the front and rear short sides of the loading platform 2, and the back panel arranged along one of the long sides of the loading platform 2. 5. The back panel 5 is provided with a free wheel 6 disposed on both lower sides of the back panel 5 and lower ends of the front and rear side panels 3, 4 on the side far from the back panel 5. 5 is supported by the lower sides of the front and rear side panels 3 and 4 when horizontally tilted, and the front side panel 3 is provided on the adjacent back panel 5. Around the vertical axis on the vertical side It is rotatably connected.

  Thus, when the carriage 1 is not used as a carriage, the carrier 2 is erected so as to overlap the back panel 5, and the erected carrier 2 is placed between the back panel 5 and the carrier 2. By folding the front side panel 3 so as to overlap the inner side of the back panel 5 so as to be sandwiched, the entire transport carriage 1 is folded into an L shape in plan view, and a plurality of transport carts 1 folded in the same manner are planar. In view, they can be nested together and nested.

  The traction device of the present invention in this embodiment is the center lower side of the end portion on the traction direction side of the bottom frame of the transport carriage 1, in other words, the center of the lower frame (angle member) 3a of the front side panel 3. The support member 7 attached to the lower side, the traction tool 8 that is detachable with respect to the support member 7, and the lower center of the end of the bottom frame of the carriage 1 opposite to the traction direction, in other words, In this case, the connecting member 10 is attached to the lower center of the lower frame (angle member) 4 a of the rear side panel 4.

  As shown in FIG. 3, the support member 7 includes a pair of left and right side plates 11, a connecting plate 12 that connects and integrates the left and right side plates 11, and the left and right side plates 11 on the rear side of the left and right side plates 11. The rear side plate 13 is formed by projecting from the left and right side plates 11 in the horizontal direction to form a pair of left and right stopper portions 14. The left and right side plates 11 are each provided with an inverted L-shaped support hole 15 having a support shaft insertion / removal opening 15a that is long in the vertical direction and has an upper end bent forward. The connecting plate 12 has a groove-shaped cross section that surrounds the vertical hole of the inverted L-shaped support hole 15.

  As shown in FIG. 4, the traction tool 8 is fixedly installed between the two left and right vertical bars 16 arranged in a tapered manner and the tip part where the distance between the two vertical bars 16 is narrowed and connected. The tip plate 18 provided with the holes 17 and the vertical bars 16 are fixedly installed between the vertical bars 16 at a position closer to the rear end side where the distance between the vertical bars 16 is wider than the center position in the longitudinal direction of the vertical bars 16. The connecting rod-shaped member 19 and a support shaft 20 fixedly spanned between the vertical rod-shaped members 16 between the connecting rod-shaped member 19 and the rear ends of the two vertical rod-shaped members 16 are provided. A pair of left and right extending portions 21 is constituted by a portion extending backward from the support shaft 20 of the both vertical bar-shaped members 16, and both the vertical bar-shaped members 16 are on the same side in a side view at the position of the connecting bar-shaped member 19. It is bent to. In addition, a connecting pin 23 is attached to the vertical bar 16 on one side via a flexible cable-like body 22 such as a chain.

  As shown in FIGS. 5 and 6B, the connecting member 10 is rotatably supported by an inverted gate-shaped bearing plate member 24 fixed to the lower center (angle member) 4 a of the lower frame (angle member) 4 a of the rear side panel 4. It is a bifurcated one that is fixedly attached to the horizontal support shaft 25 and hangs down. The connection hole 26 is provided. By rotating the connection member 10 rearward and upward around the support shaft 25, the connection hole 26 is provided. Is configured to penetrate vertically in a state of protruding rearward from the lower frame (angle member) 4a of the rear side panel 4.

  When the traction tool 8 having the above-described configuration is used, as shown by an imaginary line in FIG. 6A, the vertical traction tool 8 holding the upper end plate member 18 side is positioned at the intermediate bent portion position (connecting bar shape). In a state where the lower region from the position of the material 19 is bent toward the support member 7 side, both ends of the support shaft 20 are connected to the support shaft insertion / removal openings 15a of the left and right support holes 15 on the support member 7 side. The traction tool 8 is lowered obliquely so that the support shaft 21 is inserted into the lower ends of the left and right support holes 15. At this time, the distance between the pair of left and right extending portions 21 is determined so that the pair of left and right extending portions 21 of the traction tool 8 sandwich the left and right side plates 11 of the support member 7 from the outside.

  If both ends of the support shaft 20 are supported by the lower ends of the pair of left and right support holes 15 on the support member 7 side, as shown by the solid line in FIG. The pair of left and right extending portions 21 are brought into contact with the pair of left and right stopper portions 14 on the support member 7 side (lower sides of the left and right projecting portions of the rear side plate 13). In this state, the traction tool 8 is stably held in a posture extending from the support member 7 in a substantially horizontal direction forward because the center of gravity is on the tip plate 18 side of the support shaft 20. In this state, the traction tool 8 has a shape in which the shape of the side view is inverted to a convex downward.

  The carriage 1 to which the traction tool 8 is attached as described above uses the traction tool 8 at the rear end of the other carriage 1 having the same structure, as indicated by phantom lines in FIGS. 1A and 2. Can be connected. That is, as shown in FIG. 6B, the connecting member 10 on the lower end of the rear end of the transport carriage 1 connected to the traction tool 8 is rotated rearward and upward around the support shaft 25, and the bifurcated connecting member. 10, the tip plate 18 of the traction tool 8 is inserted, and the connection pin 23 is inserted from above the connection hole 26 of the connection member 10 and the connected hole 17 on the tip plate 18 side of the traction tool 8 to pull the connection member 10. The tool 8 may be connected.

  The connecting pin 23 is held by the bulging head at the upper end and the gravity, but a stopper can be provided if necessary. Of the relative vertical movement caused by a step on the floor surface between the two transport carts 1 connected to each other by the traction tool 8 and the connecting member 10, the transport cart 1 on the connecting member 10 side is Relative vertical movement in the direction of ascending with respect to the carriage 1 on the traction tool 8 side is caused by the traction tool 8 rotating upward with the support shaft 20 as a fulcrum and the connecting member 10 downward with the support shaft 25 as a fulcrum. However, since the traction tool 8 cannot rotate downward with the support shaft 20 as a fulcrum, the reverse relative vertical movement is caused by the connecting member 10 and the tip of the traction tool 8 inserted therein. It must be constructed so as to be absorbed by the play allowance between the plate member 18 and the vertical direction.

  Further, the structure of the traction tool 8 is not limited to that shown in the above embodiment. For example, it is possible to form a connected hole portion into which the connecting pin 23 is inserted by bending a single rod-shaped material into a V shape and fixing a horizontally oriented rod-shaped material or the like inside the folded tip portion. However, the connecting rod 19 can be omitted.

  Further, the traction tool 8 can be removed by pulling up from the support member 7 when not in use, but the traction tool 8 is rotated upward around the support shaft 20 as schematically shown in FIG. 6A. In this state, the traction tool 8 and the front side panel 3 adjacent to the traction tool 8 can be configured to be detachably locked by appropriate locking means 27, for example, a hook-shaped metal fitting. . In this case, it is desirable to attach a hook-shaped metal fitting or the like as the locking means 27 to the vertical bar-shaped material 16 of the traction tool 8. Further, as shown in the above-described embodiment, when the traction tool 8 is bent in a reversely convex shape in a side view, the portion where the traction tool 8 overlaps the front side panel 3 as shown in the figure. It is possible to stand vertically along the front side panel 3, and the amount of forward protrusion can be minimized.

FIG. A is a side view of a transport carriage with a pulling tool attached, and FIG. It is a top view of the conveyance trolley. Fig. A is a front view showing a support member, and Fig. B is a side view thereof. Fig. A is a plan view showing a traction tool, and Fig. B is a side view thereof. Fig. A is a side view showing the connecting member, and Fig. B is a front view thereof. Fig. A is a vertical side view showing the main part with the traction tool attached, and Fig. B is a vertical side view showing the main part in a state where the transport carts are connected with the traction tool.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Transfer trolley 2 Loading platform 3 Front side panel 3a Lower frame 4 of the front side panel Rear side panel 4a Lower frame 5 of the rear side panel Back panel 6 Swivel wheel 7 Support member 8 Towing tool 10 Connecting member 11 Left and right both sides Plate 12 Connection plate material 13 Rear side plate 14 Stopper portion 15 Support hole 15a Support shaft loading / unloading opening 16 Vertical rod-shaped material 17 Connected hole 18 Tip plate material 19 Connecting rod-shaped material 20 Support shaft 21 Extending portion 23 Connection pin 24 Bearing plate material 25 Support Shaft 26 Connecting hole 27 Locking means

Claims (6)

  It comprises a support member attached to the bottom of the bottom frame at the end in the pulling direction side of the transport carriage, and a pulling tool that can be attached to and detached from the support member. A shaft is provided, and the support member is provided with a vertical support hole into which the support shaft of the traction tool is fitted, and a support shaft insertion opening that is bent open in the traction direction side is provided at the upper end of the support hole. A trolley pulling device provided for transportation.   The traction tool is provided with an extending portion that extends in a direction opposite to the traction direction from the support shaft, and the traction tool is in a state in which the support shaft is supported at the lower end of the support hole. However, the pulling device for a transport carriage according to claim 1, further comprising a stopper portion that prevents the end portion on the pulling direction side from rotating in a downward direction by contact with the extending portion.   The traction tool is configured such that the shape of the side view is an inverted letter that is convex downward, and the support shaft is disposed at a position away from the intermediate bending portion position of the traction tool in a direction opposite to the traction direction. The trolling device for a transport carriage according to claim 1 or 2, wherein   The traction tool has two left and right vertical bars connected to each other by fixing both ends of the support shaft, and extends in a direction opposite to the traction direction from the support shaft of the left and right vertical bars. The protruding part constitutes the extension part, and the support member is connected to the left and right side plates and the pair of left and right side plates adjacent to the inside of the left and right vertical bars and the support holes are formed. It is composed of a connecting plate material to be integrated and a rear side plate that protrudes laterally laterally from the left and right side plates on the rear side of the left and right side plates, and the stopper portion is formed on the lower side of the both ends of the rear side plate. The trolling device for a carriage for transportation according to claim 2 or 3.   A connecting member is provided on the lower side of the bottom frame at the end opposite to the pulling direction of the transport carriage so as to be swingable around a horizontal supporting shaft. The connecting member includes the connecting shaft. A connecting hole is provided at the tip that protrudes rearward from the end opposite to the pulling direction of the transport carriage by rotating upward and rearward around the tip, and the tip of the pulling tool has a cover that matches the connecting hole. The transport carriage according to claim 1, wherein a transport hole is provided, and the transport carts can be connected to each other via a connection pin inserted through the connection hole and the connected hole. Traction device.   The traction device for a transport carriage according to any one of claims 1 to 5, further comprising a locking means for locking the traction tool in a standing posture by rotating the traction tool upward around a support shaft.