JP3110613U - Load receiving device storage device in retractable load receiving device lifting device - Google Patents

Abstract

An object of the present invention is to provide a load receiving table storage device in a retractable load receiving device lifting / lowering device capable of reliably preventing rattling during traveling while the load receiving table is stored and capable of stably sliding the load receiving table. provide.
A load receiving platform 5 is provided on the loading platform 1 via a link mechanism 4 so as to be movable up and down by an elevating means 62, and the load receiving platform 5 side including the link mechanism 4 and the elevating means 62 extends along a slide rail 12 through a slide member 3. A retractable load receiving platform that is configured to be slidable back and forth between a storage position below the loading platform 1 and a work position behind the loading platform 1 and is stored in the storage position with the loading platform 5 folded into at least two. In the device 2, a support roller 7 that supports the folding load receiving table 5 is provided on the load receiving table 5 side, and a pressing roller 8 that holds the load receiving table 5 supported by the support roller 7 between the support rollers 7. ing.
[Selection] Figure 1

Description

  The present invention is configured such that the cradle side is slidable back and forth between the storage position below the pallet and the work position behind the pallet along the slide rail through the slide member, and the cradle is stored in a state in which the cradle is folded into at least two. The present invention relates to a load receiving table storage device in a retractable load receiving table lifting device for storing in a position.

  2. Description of the Related Art Conventionally, a load receiving platform is provided via a link mechanism so as to be movable up and down by an elevating means, and the load receiving platform side including the link mechanism and the elevating means follows a pair of left and right slide rails provided on the load platform side through left and right slide members. There is provided a retractable loading platform lifting device configured to be slidable back and forth between a storage position below the loading platform and a working position behind the loading platform, and storing the loading platform in the storage position in a folded state. Yes.

And in this conventional retractable load receiving device lifting device, when the load receiving device side is arranged in the storage position, the load receiving device side is forcibly moved downward to prevent rattling on the load receiving device side due to vibration during traveling. A leaf spring to be urged was provided on the side of the vehicle frame that is the fixed side (see, for example, Patent Document 1).
JP 2003-25901 A

  However, just by urging the load receiving table side downward by the urging force of the leaf spring as in the conventional case, the load receiving force is resisted against the urging force of the leaf spring when an excessive impact occurs during traveling or the like. A backlash occurred on the table side, and the backlash could not be reliably prevented. Further, when the urging force of the leaf spring is weakened due to long-term use, there is a problem that rattling occurs due to vibration during normal running.

  Furthermore, since the leaf spring is urged downward by the leaf spring when the leaf spring is provided on the vehicle frame side and the load carrier is placed in the retracted position, the load carrier is not moved while the folded load carrier is slid. Folded and free. Therefore, there is a possibility that the load receiving table jumps up when some external factor is applied to the load receiving stand in this state, which has been a factor that hinders the smooth sliding operation of the load receiving stand.

  The present invention has been made in view of the above-mentioned problems, and the purpose of the present invention is to prevent rattling even when an excessive impact occurs during traveling or the like in a state in which the load receiving stand is stored or when it is used for a long time. An object of the present invention is to provide a load receiving table storage device in a retractable load receiving device lifting / lowering device that can be surely prevented and can stably slide the load receiving table.

  In order to achieve the above object, the load receiving base storage device in the retractable load receiving base lifting device of the invention according to claim 1 is provided such that the load receiving base is provided on the load base via a link mechanism so that the load receiving base can be moved up and down freely. The load receiving platform side including the mechanism and the lifting / lowering means is configured to be slidable back and forth between the storage position below the loading platform and the working position behind the loading platform along the slide rail through the slide member, and the loading platform is folded into at least two. In the retractable load receiving device lifting apparatus stored in the storage position in a state where the load is received, a support roller for supporting the load receiving table to be folded is provided on the load receiving table side, and the load receiving table supported by the support roller is supported. A pressing roller that is sandwiched between the rollers is provided.

  According to a second aspect of the present invention, the pressing roller is provided on the load receiving side so as to be able to swing up and down via a swinging arm, and when the load receiving base slides. The load receiving table folded in contact with the lower surface of the slide rail rolls along the slide rail while being lightly pressed from above, and is further swung downward by a dog provided on the lower surface of the slide rail in the retracted position. The load receiving base folded in a folded manner is sandwiched between support rollers.

  According to the present invention, it is possible to reliably prevent rattling on the load receiving side against excessive impact such as vibration during traveling, and it is possible to travel in a safe state by preventing damage due to such rattling.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 shows a configuration of a load receiving table storage device in a retractable load receiving device lifting apparatus of the present invention.

  In FIG. 1, reference numeral 1 denotes a loading platform mounted on a vehicle body frame 11, and a retractable loading platform lifting device 2 is provided below the rear end of the loading platform 1.

  The retractable load receiving platform lifting / lowering device 2 includes a slide member 3 provided on the vehicle body frame 11 and a load receiving stand 5 provided on the slide member 3 via a link mechanism 4.

  The slide member 3 is slidable in the front-rear direction along the slide rail 12 disposed in the front-rear direction at the rear end of the vehicle frame 11.

  Specifically, the slide rail 12 is made of, for example, an I-shaped steel, and is arranged with the web in the middle of the slide rail 12 being vertical, and the slide member 3 is slidably provided on the slide rail 12 via a slide mechanism (not shown). . The slide mechanism includes, for example, a slide pad that is in sliding contact with the upper and lower flanges of the slide rail 12 sandwiched from above and below, a roller that rolls the outer surface of the web of the slide rail 12 in the slide direction, and the like.

  A drive shaft 6 is supported on the slide member 3 substantially horizontally. A base end portion of a drive arm 61 is integrally fixed to the drive shaft 6, and a distal end of a telescopic rod 62 a of a lift cylinder 62 provided on the slide member 3 is connected to a distal end portion of the drive arm 61.

  Further, the drive shaft 6 is integrally provided with a base end portion of a rotation bracket 63, and a base end portion of a lift link 41 described later is pivotally supported at an intermediate portion of the rotation bracket 63.

  The link mechanism 4 includes a lift link 41 and a connecting link 42.

  The lift link 41 is pivotally supported by a pivot 41 a at the base end of the pivot bracket 63.

  A contact bolt 64 provided at the distal end of the rotating bracket 63 is configured to be able to contact the lower surface of the lift link 41 near the base end portion. By abutting on the part closer to the end from below, the expansion / contraction operation of the lift cylinder 62 can be transmitted to the lift link 41 as the rotation operation of the rotation bracket 63 via the drive arm 61 and the drive shaft 6. As a result, the lift link 41 rotates up and down.

  The base end of the connecting link 42 is pivotally supported on the mounting member 3 by a pivot 42a.

  A pair of left and right members such as the slide rail 12, the slide member 3, the link mechanism 4, and the drive shaft 6 described above are provided on both sides of the vehicle frame 11, and the left and right slide members 3 slide in synchronization with the slide rail 12. Are connected to each other by a connecting member 3a.

  The load receiving platform 5 includes a distal end side member 51 and a proximal end side member 52, and the distal end side member 51 and the proximal end side member 52 are connected to each other by a hinge 53. It can be folded in two on the top surface.

  On the left and right sides of the base end portion of the base end side member 52, the tip ends of the left and right connecting links 42 are pivotally supported by pivots 42 b on the upper portions thereof via brackets 54, and the tips of the left and right lift links 41 are below the lower portions. The part is pivotally supported by the pivot 41b.

  Further, the tip 51a of the tip side member 51 is formed in a wedge shape, and when the load receiving platform 5 reaches the ground, it tilts as shown by a one-dot chain line in FIG. It is made to do.

  The retractable load receiving device lifting / lowering device 2 configured as described above is configured so that the left and right slide members 3 as shown in FIG. The storage position in which the slide member 3 is slid to the front end and the work position in which the slide member 3 is slid to the rear end of the slide rail 12 can be disposed. The loading platform 5 can be moved up and down between the ground and the floor surface of the loading platform 1.

  By the way, the retractable load receiving device elevating device 2 configured as described above is provided with a support roller 7 and a pressing roller 8 which constitute the main part of the present invention.

  The support roller 7 is provided on the slide member 3 so as to protrude rearward through the support member 71, and supports the distal end portion of the distal end side member 51 when the distal end side member 51 is folded.

  The pressing roller 8 is provided in the middle of the support member 71 via a swing arm 81 so as to be swingable up and down above the support member 71. The pressing roller 8 is disposed below the slide rail 12, and when the load receiving platform 5 is disposed at the retracted position as shown in FIG. 2, a dog 9 provided on the lower surface of the slide rail 12. The tip 51a of the tip-side member 51 is firmly held between the support roller 7 by being swung downward and pressed against the tip 51a of the tip-side member 51 supported by the support roller 7 from above. I try to keep it.

  Further, as shown in FIG. 3, when the load roller 5 is slid between the storage position and the work position, the pressing roller 8 abuts against the lower surface of the slide rail 12, thereby causing the distal end portion of the distal end side member 51 to move. The front end part is brought into contact with 51a from above and is lightly pushed down.

  Furthermore, as shown in FIG. 4, when the load receiving platform 5 is arranged at the working position, the pressing roller 8 is arranged behind the slide rail 12 and the spring 82 connected to the swing arm 81 and the support member 71. It is arranged slightly above the lower surface of the slide rail 12 by the urging force so that the distal end side member 51 can be deployed.

  The support roller 7 and the pressing roller 8 configured as described above are provided in a pair on the left and right corresponding to the slide member 3 and the slide rail 12.

  Next, the operation of the retractable load receiving table elevating device 2 configured as described above will be described.

  First, in the state where the retractable load receiving device lifting device 2 is disposed at the retracted position stored below the load carrier 1 as shown in FIG. 2, the pressing roller 8 is pushed down against the biasing force of the spring 82 by the dog 9. The front end portion 51 a of the front end side portion 51 of the load receiving tray 5 folded by the pressing roller 8 is pressed downward so that the front end portion 51 a is firmly held between the support rollers 7.

  As a result, the load receiving stand 5 is stably placed in the storage position while firmly holding the folded state. Therefore, it is possible to reliably prevent rattling on the load receiving platform 5 against excessive shock such as vibration during traveling, and it is possible to travel in a safe state while preventing damage due to such rattling.

  Next, in order to arrange the retractable load receiving table lifting device 2 from the retracted position to the working position, the telescopic cylinders are respectively extended. By the extension operation of the telescopic cylinder, the left and right slide members 3 are moved to the rear end side of the cargo bed 2 along the left and right slide rails 12 via the slide mechanism. It slides to the rear end side and is arranged at the work position.

  In this way, when the retractable load receiving table lifting device 2 as a whole slides to the rear working position, the pressing roller 8 moves along the slide rail 12 while rolling on the lower surface of the slide rail 12. As a result, the pressing roller 8 moves so as to slightly press the distal end portion 51a of the distal end side member 51. When the load receiving platform 5 reaches the working position, the pressing roller 8 is disposed behind the slide rail 12 and the spring 82 By swinging upward by the biasing force, the tip end member 51 is separated upward from the upper end portion 51a.

  Then, in the working position, with the load receiving platform 5 with the distal end side member 51 folded in the state, the lift cylinder 62 is retracted and lowered to the ground, so that the state shown by the one-dot chain line in FIG. Thereafter, the distal end side member 51 is rotated rearward so that the distal end side member 51 is deployed so as to be on the same horizontal plane as the proximal end side member 52 (see FIG. 1). As a result, the load receiving platform 5 can move up and down between the ground and the floor surface of the loading platform 1 by the expansion and contraction operation of the lift cylinder 62, and the lifting and lowering operation allows the load receiving platform 5 to move the cargo between the ground and the loading platform 1. Unloading work can be performed.

  Furthermore, when the loading / unloading operation of the load is completed and the retractable load receiving device lifting / lowering apparatus 2 is stored, the retractable load receiving device lifting / lowering apparatus 2 is arranged from the working position to the retracted position by an operation reverse to the above-described operation. That is, at the working position, the distal end side member 51 is rotated upward with respect to the proximal end side member 52 so that the distal end portion 51a of the distal end side member 51 is supported by the support roller 7, and the lift cylinder 62 is extended in this state. The tip end side member 51 and the base end side member 52 are moved up to a position where they are substantially horizontal (see FIG. 4).

  Thereafter, the slide member 3 is slid along the slide rail 12 to the lower side of the loading platform 2 and placed at the storage position as shown in FIG.

  At this time, when the load receiving platform 5 moves below the loading platform 2 from the working position, the pressing roller 8 moves along the lower surface of the slide rail 12 so that the pressing roller 8 resists the biasing force of the spring 82. Then, it moves downward and lightly pushes the distal end portion 51a of the distal end side member 51 downward. In this state, the load receiving platform 5 is guided to the storage position.

  When the load receiving platform 5 is disposed at the retracted position, the pressing roller 8 swings further downward against the urging force of the spring 82 by the dog 9, whereby the pressing roller 8 is moved to the distal end portion 51 a of the distal end side member 51. Is pressed downward with a strong force, and the front end portion 51a of the front end side member 51 is firmly clamped by the support roller 7. For this reason, as described above, the load receiving platform 5 side is stably arranged at the storage position.

  In this manner, in the retracted position, the pressing roller 8 is swung downward by the dog 9 and the front end portion 51a of the front end side member 51 is firmly sandwiched between the support roller 7 and an excessive impact occurs during traveling. In such a case, it is possible to reliably prevent backlash of the load receiving platform 5 even when used for a long time.

  Further, even when the load receiving platform 5 is slid along the slide rail 12, the pressing roller 8 abuts on the tip 51a of the tip-side member 51 and lightly holds the tip 51a downward. As a result, the tip-end side member 51 can be prevented from jumping up during sliding, and the load receiving platform 5 can be smoothly slid in a stable state.

  The above-described embodiment is merely a preferred embodiment of the present invention, and the present invention is not limited to this, and various design changes can be made within the scope thereof.

  For example, the pressure roller 8 is swung downward using the lower surface of the slide rail 12. However, a guide is provided separately from the slide rail 12, and the pressure roller 8 is swung downward by this guide. You may make it make it. In this case, a dog 9 may be provided on the guide.

  In addition, the load receiving platform 5 is not limited to being folded in half, and the load receiving platform storage device of the present invention can be applied to those having three or more folded loads.

It is a side view which shows the structure of the load receiving stand storage apparatus in the retractable load receiving stand raising / lowering apparatus of this invention arrange | positioned in the working position. It is a side view which shows the state arrange | positioned in the storage position in the load receiving stand storage apparatus in the retractable load receiving stand raising / lowering apparatus of this invention. It is a side view which shows the operation | movement at the time of a slide in the load receiving stand storage apparatus in the retractable load receiving stand raising / lowering apparatus of this invention. It is a side view which shows the operation | movement at the time of storage in the load receiving stand storage apparatus in the retractable load receiving stand raising / lowering apparatus of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Loading platform 12 Slide rail 2 Retractable loading platform raising / lowering device 3 Slide member 4 Link mechanism 43 Lift cylinder (elevating means)
7 Supporting roller 71 Supporting member 8 Pressing roller 81 Swing arm 9 Dog

Claims (2)

The loading platform is provided on the loading platform through a link mechanism so as to be movable up and down by the lifting means, and the loading platform side including the link mechanism and the lifting mechanism is placed along the slide rail through the slide member and the storage position below the loading platform and the work behind the loading platform. In a retractable load receiving device lifting apparatus configured to be slidable back and forth between positions, and being stored in a storage position in a state where the load receiving table is folded into at least two,
The load receiving table is provided with a support roller for supporting the load receiving table to be folded and a pressing roller for holding the load receiving table supported by the support roller with the support roller. A load receiving table storage device in a load receiving table lifting device. The pressing roller is provided on the load receiving side so as to be swingable up and down via a swing arm. During the sliding operation of the load receiving table, the pressing roller is pressed lightly from above to contact the folded bottom of the slide rail. However, it is configured to roll along the slide rail and to be sandwiched between the support roller and the load receiving platform which is swung further downward by the dog provided on the lower surface of the slide rail in the retracted position. The stowage receiving device in the retractable receiving device lifting device.

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