JP3110634U - Slide drive device in retractable load carrier lifting device - Google Patents

Abstract

Disclosed is a slide drive device in a retractable load receiving device lifting / lowering device capable of preventing a hydraulic hose from being damaged or cut due to movement on the moving side.
A load receiving platform side including a link mechanism and the like is configured to be slidable back and forth between a storage position and a working position. On the moving side, a slide cylinder main body 8a has its telescopic rod 81 attached to the load platform 1. A pair of wound members 82 are provided on the front end of the telescopic rod 81 so as to wind the first and second linear members 91 and 92. The first linear member 91 has one end. 91a is fixed to the fixed side, which is the front side of the wound member 82, and the other end 91c is moved after the intermediate portion 91b is guided to one of the wound members 82 and wound forward. The second linear member 92 is fastened to the fixed side where one end 92a is behind the wound member 82, and the middle part 92b is guided to the other wound member 82. After being folded back and wound, the other end 92c is fixed to the moving side. .
[Selection] Figure 4

Description

  The present invention provides a retractable load receiving device lifting / lowering device configured such that a load receiving platform side including a link mechanism and a driving means is slidable back and forth between a storage position below the loading platform and a work position behind the loading platform. The present invention relates to a slide driving device for sliding a load receiving side with respect to a fixed side.

  Conventionally, a load receiving platform is provided on a fixed loading platform via a link mechanism so as to be movable up and down by a driving means, and the loading platform side serving as a moving side including the link mechanism and the driving means is arranged along the slide rail through an attachment member. 2. Description of the Related Art There is provided a retractable load receiving table lifting / lowering device configured to be slidable back and forth between a storage position below the loading platform and a work position behind the loading platform.

Then, in order to slide the moving side along the slide rail with respect to the fixed side, the slide cylinder is provided on the fixed side with the telescopic rod facing the back of the cargo bed, and through the pulley provided at the tip of the telescopic rod. A wire is stretched between the fixed side and the moving side, and the sliding side of the slide cylinder is extended and contracted to slide the moving side along the fixed side slide rail. In this case, the moving side moves about twice as much as the amount of expansion and contraction of the slide cylinder by the action of the wire (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 11-78661

  However, when the slide cylinder is provided on the fixed side as in the conventional case, a supply device such as a hydraulic pump that supplies pressure oil to the slide cylinder is also provided on the fixed side in the same manner as the slide cylinder in terms of ease of mounting. Therefore, a hydraulic hose is connected to the slide cylinder from the supply device to supply and discharge the pressure oil.

  For this reason, when the moving side moves, there is a possibility that the hydraulic hose interferes with the moving side to cause damage or cutting of the hydraulic hose, and there is a problem that the mounting is restricted in order to prevent this.

  Although it is theoretically possible to provide the supply device on the moving side, in this case as well, it is necessary to arrange the hydraulic hose to follow the movement on the moving side. In addition to being complicated, there is a possibility that the hydraulic hose may interfere with the moving side and cause damage or cutting of the hydraulic hose as described above, and there is a problem that the mounting is restricted in order to prevent this.

  In order to achieve the above object, the slide drive device in the retractable load receiving device lifting apparatus of the invention according to claim 1 is provided such that the load receiving table can be moved up and down by the drive means via the link mechanism on the fixed load receiving plate. A retractable type in which the load receiving side, which is the moving side including the link mechanism and the driving means, is slidable back and forth between the storage position below the load bed and the work position behind the load bed along the slide rail through the mounting member. In the load receiving platform lifting apparatus, a slide cylinder main body is connected to the moving side with its telescopic rods facing the front of the load platform, and two first linear members and second linear members at the distal ends of the telescopic rods. The first linear member is fastened to the fixed side, which is the front side of the wound member, and the middle part is one of the wound members. Leaded by member After being folded and wound, the other end is fastened to the moving side, and the second linear member is fastened to the fixed side, one end being behind the wound member, and the middle part is the other covered. After being guided by the winding member and folded back and wound, the other end is fixed to the moving side.

  The slide drive device in the retractable load receiving device lifting apparatus of the invention according to claim 2 is provided such that the load receiving table is provided on the fixed load receiving plate via the link mechanism so as to be movable up and down by the driving means, and the link mechanism and the driving means are provided. In the retractable load receiving device lifting and lowering device configured such that the load receiving table side which is the moving side is slidable back and forth between the storage position below the load bed and the work position behind the load bed along the slide rail through the mounting member On the side, the tip of the telescopic rod is connected in a state where the telescopic rod of the slide cylinder faces the front of the loading platform, and further, the rear winding is possible to wind the first linear member around the cylinder main body of the slide cylinder. And a front wound member capable of winding the second linear member is provided at the front of the cylinder body. One end of the first linear member is more than the rear wound member. The second linear member is fixed to the moving side, which is the front side of the base, the middle part is guided to the rear winding member and folded forward and wound, and the other end is fixed to the fixed side. The one end is fixed to the moving side, which is the rear side of the loading platform rather than the front wound member, and the other end is fixed after the middle part is guided to the front wound member and folded back and wound. It is fixed to the side.

  According to the present invention, since a supply device such as a hydraulic pump for supplying pressure oil to the slide cylinder can be provided on the moving side in the same manner as the slide cylinder, the slide cylinder and the supply device are directly attached or close to this state. Thus, it is possible to prevent the hydraulic hose from being damaged or cut off due to the movement on the moving side as in the case where a slide cylinder is provided on the fixed side as in the prior art.

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

  FIG. 1 shows a schematic configuration of a retractable cargo receiving table lifting device.

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

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

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

  Specifically, the slide rail 12 is made of, for example, I-shaped steel, and is arranged with a web in the middle thereof being vertical, and the mounting member 3 is slidably provided on the slide rail 12 via a slide mechanism. 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 mounting 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 (drive means) 62 similarly provided on the attachment member 3 is connected to a distal end portion of the drive arm 61. Has been.

  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 mounting 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 mounting 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 supported on the lower portions thereof. The part is pivotally supported by the pivot 41b.

  Further, the tip of the front end 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. Has been made.

  Next, the operation of the retractable load receiving device lifting apparatus configured as described above will be described.

  As a basic operation of the retractable load receiving device lifting / lowering device 2, the retractable load receiving device lifting / lowering device 2 slides the attachment member 3 through the slide mechanism in a state where the load receiving stand 5 is folded by a slide driving device described later. A storage position A (refer to FIG. 2) for sliding and storing the front end portion of the rail 12 and a load receiving base 5 in which the mounting member 3 is similarly slid and folded to the rear end portion of the slide rail 12 are folded. The end member 52 is unfolded so as to be in a horizontal state, and the unfolding / folding position B (see FIG. 3) for folding the unfolded load receiving platform 5 and the mounting member 3 in a state in which the load receiving platform 5 is unfolded. Similarly, it is possible to place the load receiving platform 5 at a lifting operation position C (see FIG. 1) where the load receiving platform 5 is moved up and down between the ground and the floor surface of the loading platform 1 by being slid in the middle of the slide rail 12.

  First, when the loading / unloading operation of the load is performed by the retractable load receiving device lifting / lowering device 2 disposed at the storage position A as shown in FIG. 2, the attachment member 3 is moved from the front end of the slide rail 12 to the rear in this state. By sliding to the end, the retractable load receiving device lifting device 2 is placed at the unfolding / folding position B shown in FIG.

  When the retractable load receiving table elevating device 2 is arranged at the unfolding / folding position B in this way, the distal end side member 51 of the folded load receiving stand 5 is rotated rearward to thereby move the proximal end side member 52 and the distal end side member. Expand so that 51 is horizontal. Since the loading platform 5 is deployed with the entire loading platform 5 pulled out behind the loading platform 1 and the vehicle frame 11, the loading platform 5 does not interfere with the loading platform 1 and the vehicle frame 11.

  In this state, when the retractable load receiving device elevating device 2 is slid from the unfolded / folded position B to the elevating work position C side and the mounting member 3 reaches the elevating work position C, the retractable load receiving device is moved up and down by positioning means (not shown). The apparatus 2 is positioned at the raising / lowering operation position C.

  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. Perform unloading work.

  Next, when the loading / unloading operation of the load is completed and the retractable load receiving device lifting / lowering device 2 is stored, the retractable load receiving device lifting / lowering device 2 is temporarily arranged from the lifting / lowering operation position C to the unfolding / folding position B, At this position, the front end side member 51 of the load receiving platform 5 is folded. The loading platform 5 is folded in a state where the entire loading platform 5 is pulled out behind the loading platform 1 and the vehicle frame 11 in the same manner as the above-described deployment of the loading platform 5, so that the loading platform 5 is loaded with the loading platform 1 and the vehicle frame 11. There will be no interference.

  Then, with the load receiving platform 5 folded in this manner, the retractable load receiving platform lifting device 2 is slid from the unfolded / folded position B to the storage position A side and disposed at the retracted position.

  By the way, the retractable load receiving device elevating device 2 configured as described above is provided with the slide drive device 7 for sliding the moving side of the load receiving stand 5 and the like with respect to the slide rail 12 serving as the fixed side as described above. It has been.

  FIG. 4 shows the configuration of the slide drive device 7. In FIG. 4, the other members described above are omitted for convenience in order to show the configuration of the slide drive device 7 as a center.

  The slide drive device 7 includes a slide cylinder 8, two first linear members 91, and a second linear member 92.

  The slide cylinder 8 is provided on the mounting member 3 whose cylinder body 8a is on the moving side with the telescopic rod 81 facing the front of the loading platform 1. A pair of left and right wound members 82 are rotatably supported at the distal end of the telescopic rod 81 so that the first linear member 91 and the second linear member 92 can be wound.

  The first linear member 91 is fixed to, for example, the vehicle frame (fixed side) 11 whose one end 91 a is on the front side of the wound member 82, and the middle portion 91 b is guided to one of the wound members 82 and forward. After being folded back and wound, the other end 91 c is fastened to the tip of the extending member (moving side) 31 that extends forward from the mounting member 3.

  The second linear member 92 is fixed to an appropriate position of, for example, the guide rail (fixed side) 12 whose one end 92 a is on the rear side of the wound member 82, and the middle portion 92 b is guided to the other wound member 82. After being turned back and wound, the other end 92c is fixed to the base end (moving side) of the extending member 31, for example.

  For example, wires are used as the first and second linear members 91 and 92, and in this case, a pulley is used as the member 82 to be wound. Further, the first and second linear members 91 and 92 may be chains in addition to the above wires. In this case, a sprocket is used as the member 82 to be wound.

  Next, the operation of the slide drive device 7 will be described.

  First, when the slide cylinder 8 is retracted from the state shown in FIG. 4, the wound member 82 moves backward so as to retract the first linear member 91. As a result, the other end 91c of the first linear member 91 fixed to the extending member 31 on the movable side moves rearward together with the extending member 31, so that the entire moving side including the attachment member 3 is moved. Slide backwards. As a result, the entire moving side from the lifting / lowering operation position shown in FIG. 4 to the load receiving platform 5 side can be arranged at the above-described development / folding position. That is, when the slide cylinder 8 is retracted and the moving side is moved rearward, the first linear member 91 is mainly responsible for this, and the second linear member 92 follows this.

  Further, when the slide cylinder 8 is extended from the state shown in FIG. 4, the wound member 82 moves forward so as to push out the second linear member 92. As a result, the other end 92c of the second linear member 92 fixed to the extending member 31 on the movable side moves forward together with the extending member 31, so that the entire moving side including the mounting member 3 is moved. Slide forward. As a result, the entire moving side from the lifting / lowering operation position shown in FIG. 4 to the load receiving platform 5 can be arranged at the storage position described above. That is, when the slide cylinder 8 is extended to move the moving side forward, the second linear member 92 mainly takes charge of this, and the first linear member 91 follows this.

  Thus, the first linear member 91 winds the substantially half of the rear side around one of the wound members 82, and the second linear member 92 winds the substantially half of the front side around the other wound member 82, respectively. Since it is turned and turned, when the moving side is slid, the movable side can be moved about twice as much as the extension amount of the slide cylinder 8 by these actions. Thereby, size reduction of the slide cylinder 8 can be achieved and it can arrange | position using space effectively.

  By configuring the slide drive device 7 in this manner and providing the slide cylinder 8 on the moving side, a supply device such as a hydraulic pump that supplies pressure oil to the slide cylinder 8 can be similarly provided on the moving side. For this reason, the slide cylinder 8 and the supply device can be directly attached or close to each other, so that the hydraulic pressure associated with the movement on the moving side as in the case where the slide cylinder is provided on the fixed side as in the prior art. Damage or cutting of the hose can be prevented.

  FIG. 5 shows another configuration of the slide drive device 7. In FIG. 5, other members are omitted for the sake of convenience in the same manner as FIG. 4 in order to show the configuration of the slide drive device 7 as the center.

  The slide drive device 7 includes a slide cylinder 8, two first linear members 93, and a second linear member 94.

  The slide cylinder 8 is disposed with its telescopic rod 81 facing the front of the loading platform 1, and the distal end of the telescopic rod 81 is connected to the front end side (fixed side) of the slide rail 12 via the bracket 13, for example. .

  A rear wound member 83 capable of winding the first linear member 93 is provided at the rear portion of the cylinder body 8a of the slide cylinder 8, and the second linear member 94 can be wound around the front portion of the cylinder body 8a. A front winding member 84 is provided.

  The first linear member 93 is fixed to, for example, the attachment member (moving side) 3 whose one end 93 a is on the front side of the rear winding member 83, and the middle portion 93 b is guided to the rear winding member 83 and forward. Then, the other end 93c is fixed to the lower end of the bracket 13 (fixed side).

  The second linear member 94 has one end 94 a fixed to the attachment member (moving side) 3 on the rear side of the front wound member 84, and a midway part 93 b guided to the front wound member 84 and rearward. After being folded back and wound, the other end 94c is fixed to the tip of an extending member (fixed side) 14 extending rearward from the bracket 13 (fixed side), for example.

  That is, the cylinder body 8a is supported by the two first and second linear members 93 and 94 stretched as described above, independently of the moving side.

  As these first and second linear members 93 and 94, for example, wires are used in the same manner as the first and second linear members 91 and 92. In this case, pulleys are used as the front and rear wound members 83 and 84, respectively. Is used. Further, the third and fourth linear members 91 and 92 may be chains in addition to the wires. In this case, sprockets are used as the front and rear wound members 83 and 84.

  Next, the operation of the slide drive device 7 will be described.

  First, when the slide cylinder 8 is extended from the state shown in FIG. 5, the rear winding member 83 moves rearward so as to push the first linear member 93 rearward. As a result, the other end 93a of the first linear member 93 fixed to the mounting member 3 on the movable side moves rearward, and the entire moving side including the mounting member 3 is slid rearward. As a result, the entire moving side on the load receiving platform 5 side from the lifting work position shown in FIG. 5 can be arranged at the above-described unfolding / folding position. That is, when the slide cylinder 8 is extended to move the moving side rearward, the first linear member 93 mainly bears this, and the second linear member 94 follows this.

  When the slide cylinder 8 is retracted from the state shown in FIG. 5, the front wound member 84 moves forward so as to push the second linear member 94 forward. As a result, the other end 94a of the second linear member 94 fixed to the mounting member 3 on the movable side moves forward, and the entire moving side including the mounting member 3 is slid forward. As a result, the entire moving side from the lifting / lowering operation position shown in FIG. 5 to the load receiving platform 5 can be arranged at the storage position described above. That is, when the slide cylinder 8 is retracted and the moving side is moved forward, the second linear member 94 mainly takes charge of this, and the first linear member 93 follows this.

  In this way, the first linear member 93 winds the rear half of the rear wound member 83 and the second linear member 94 turns the front half of the front wound member 84 and the front half. Since it is folded, when the moving side is slid, it is possible to move the movable side by a distance approximately twice the amount of extension of the slide cylinder 8 by these actions. Thereby, size reduction of the slide cylinder 8 can be achieved and it can arrange | position using space effectively.

  By configuring the slide drive device 7 and providing the slide cylinder 8 in this way, the supply device such as a hydraulic pump that supplies pressure oil to the slide cylinder 8 is also moved to the moving side in the same manner as the slide drive device 7 described above. Can be provided. For this reason, the slide cylinder 8 and the supply device can be directly attached or close to each other, so that the hydraulic pressure associated with the movement on the moving side as in the case where the slide cylinder is provided on the fixed side as in the prior art. Damage or cutting of the hose can be prevented.

It is a side view which shows the structure of the retractable load receiving table raising / lowering apparatus arrange | positioned in the working position. It is a side view which shows the structure of the retractable goods receiving stand raising / lowering apparatus arrange | positioned in the storing position. It is a side view which shows the structure of the retractable load receiving table raising / lowering apparatus arrange | positioned in the raising / lowering operation position. It is the side view which omitted other members for convenience, in order to show the composition of a slide drive device. It is the side view which omitted other members for convenience, in order to show other composition of a slide drive device.

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 7 Slide drive device 8 Slide cylinder 81 Telescopic rod 82 Wound member 83 Rear wound member 84 Front wound member 91 First linear shape Member 92 second linear member 93 first linear member 94 second linear member

Claims (2)

A load receiving platform is provided on the fixed loading platform via a link mechanism so that the loading platform can be moved up and down by driving means, and the loading platform side on the moving side including the link mechanism and the driving means is below the loading platform along the slide rail through the mounting member In the retractable loading platform lifting device configured to be slidable back and forth between the storage position and the working position behind the loading platform,
On the moving side, a slide cylinder main body is continuously provided with its telescopic rod facing the front of the loading platform, and two first linear members and a second linear member can be wound around the distal end of the telescopic rod. A pair of left and right wound members are provided,
One end of the first linear member is fixed to the fixed side, which is the front side of the wound member, and the middle part is guided to one of the wound members and folded forward and wound. The end is fixed to the moving side,
One end of the second linear member is fixed to the fixed side, which is the rear side of the wound member, and the middle part is led to the other wound member and folded back and wound, A slide driving device in a retractable cargo receiving platform lifting device, characterized in that an end is fixed to a moving side. A load receiving platform is provided on the fixed loading platform via a link mechanism so that the loading platform can be moved up and down by driving means, and the loading platform side on the moving side including the link mechanism and the driving means is below the loading platform along the slide rail through the mounting member In the retractable loading platform lifting device configured to be slidable back and forth between the storage position and the working position behind the loading platform,
The front end of the telescopic rod is connected to the fixed side with the telescopic rod of the slide cylinder facing the front of the loading platform, and the rear cover that can wind the first linear member around the rear cylinder body of the slide cylinder. A winding member is provided, and a front wound member capable of winding the second linear member at the front of the cylinder body is provided,
The first linear member has one end fixed to the moving side which is the front side of the loading platform with respect to the rear winding member, and the middle portion is guided to the rear winding member and folded forward and wound. The other end is fixed to the fixed side,
After the second linear member is fastened at one end to the moving side which is the rear side of the cargo bed with respect to the front wound member, the middle part is guided to the front wound member and folded back and wound. The slide drive device in the retractable load receiving platform lifting device, wherein the other end is fixed to the fixed side.

Images