JP4291332B2 - Load receiving device storage device in retractable load receiving device lifting device - Google Patents

Description

  The present invention relates to a load receiving table storage device in a retractable load receiving device lifting device configured such that the load receiving side can slide back and forth between a storage position below the load bed and a work position behind the load bed along a slide rail through a slide member. Is.

  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 is along a pair of left and right slide rails provided on the load platform side through left and right slide members. 2. Description of the Related Art 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 work position behind the loading platform.

In this conventional retractable load receiving device lifting device, when the load receiving device side is arranged at 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. There are provided leaf springs that are urged against the pad, and pads that forcefully hold the load receiving side downward (see, for example, Patent Documents 1 and 2).
JP 2003-25901 A Japanese Patent Application Laid-Open No. 2005-233892

  However, in the case where the load receiving table is pressed downward by the leaf spring or the pad as in the conventional case, when the height of both the load receiving plate side and the leaf spring or the pad is shifted and approaches, the two collide. In some cases, the impact caused by the collision causes damage to both. On the other hand, when the gap is generated due to the deviation, the pressing force is weakened, and there is a problem that the backlash on the load receiving side cannot be sufficiently prevented.

  The present invention has been made in view of the above problems, and the object of the present invention is to absorb the deviation of this height even when a deviation occurs in the height of the load receiving side, and to loosen the load receiving side. It is another object of the present invention to provide a load receiving base storage device in a retractable load receiving base lifting device that can be easily applied by adjustment to models of different sizes.

In order to achieve the above object, a load receiving base storage device in a retractable load receiving base lifting apparatus according to a first aspect of the present invention is provided such that a load receiving base is provided to be lifted and lowered by a lifting means via a link mechanism. In the retractable load receiving and lifting device configured to slide back and forth between the storage position below the load carrier and the work position behind the load carrier along the slide rail through the slide member, the load receiving platform side including the mechanism and the lifting means, The load receiving platform is slidable by an expansion / contraction operation of a pair of expansion / contraction cylinders in which the rod ends are connected to the vehicle body side and the slide member side with the expansion / contraction rods arranged opposite to each other, and the slide member side When the load receiving side is placed in the retracted position by the retracting operation of these expansion / contraction cylinders, either directly or indirectly to the base end of the main body of one expansion / contraction cylinder Pivoted downwards by abutting to, is characterized in that the holding means for holding the receiving platform is provided by pressing the receiving platform.

According to a second aspect of the present invention, the main body base end of the telescopic cylinder is brought into contact with a part of the holding means via the adjusting bolt, and the holding means is held by the adjusting bolt. The operation timing is configured to be adjustable.

According to a third aspect of the present invention, the main body base end of the telescopic cylinder is brought into contact with a part of the holding means via an adjustment bolt and an adjustment rod, and the adjustment is performed. The operation timing of the holding means can be adjusted by a bolt or an adjustment rod or both.

According to a fourth aspect of the present invention, there is provided the load receiving table storage device in which the portion of the holding means that presses the load receiving table is configured by a rubber member.

  According to the present invention, it is possible to suitably hold the load receiving table while absorbing the height shift of the load receiving table due to long-term use and the temporary shift of the height of the load receiving table. It is possible to reliably prevent backlash of the load receiving table against excessive shocks such as vibrations, and to prevent damage due to this backlash and to drive in a safe state. It can be done easily.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG.1 and FIG.2 has shown the structure of the load receiving stand storage apparatus in the retractable load receiving stand raising / lowering apparatus of this invention.

  In FIGS. 1 and 2, reference numeral 1 denotes a loading platform mounted on a vehicle body 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 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 (not shown).

  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 I-shaped steel, and is arranged with the web 12c 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 12a and 12b of the slide rail 12 sandwiched from above and below, and a roller that rolls the outer surface of the web 12c of the slide rail 12 in the sliding direction. Yes.

  The link mechanism includes a lower link and an upper link. The base ends of the lower link and the upper link are pivotally supported on the slide member 3 side, and are lifted by a lift cylinder as lifting means connected to the slide member 3 side and a middle portion of the upper link. The link is configured to be rotatable up and down.

  The slide rail 12, the slide member 3, the link mechanism, and the lift cylinder described above are provided in a pair on the left and right sides of the vehicle frame 11 so that the left and right slide members 3 slide on the slide rail 12 in synchronization. It is linked by a linking member.

  The load receiving platform 5 includes, for example, three members, that is, a base end side member 51, an intermediate member 52, and a front end side member 53. The base end side member 51 and the intermediate member 52, and the intermediate member 52 and the front end side member are also provided. 53 is configured to be foldable into three as a whole by hinges. In this case, the distal end side member 53 is folded so that the distal end portion is sandwiched between the proximal end side member 51 and the intermediate member 52.

  The distal ends of the left and right upper links are pivotally supported at the upper left and right sides of the proximal end side member 51, and the distal ends of the left and right lower links are pivotally supported at the lower portion thereof.

  Further, the tip of the tip side member 53 is formed so as to tilt when the load receiving platform 5 reaches the ground and to be grounded to the ground without a step.

  The retractable load receiving device lifting / lowering device 2 configured as described above folds the load receiving stand 5 by the expansion / contraction operation of a pair of telescopic cylinders 7a and 7b, which will be described later, connected to the load receiving base 1 side and the load receiving stand 5 side. FIG. 2 shows a storage position where the left and right slide members 3 as shown in FIG. 1 are slid to the front end portion of the slide rail 12 and stored, and the slide member 3 is slid to the rear end portion of the slide rail 12. The load receiving platform 5 folded at the work position can be developed, and the load receiving platform 5 can be moved up and down between the ground and the floor surface of the loading platform 1 in this expanded state.

  By the way, the retractable load receiving device lifting apparatus configured as described above is provided with a load receiving device storing device 6 which is a main part of the present invention, and will be described below with reference to FIGS. 1 to 5.

  The load receiving table storage device 6 includes a set of two telescopic cylinders 7a and 7b that slide the slide member 3 back and forth along the slide rail 12, and a stopper 8 as a holding means for holding the load receiving table 5 at the storage position. I have.

  Specifically, as shown in FIGS. 3 and 4, the telescopic cylinders 7a and 7b are provided with a body portion so that the telescopic rods are opposite to each other, and the rod end 71 of one telescopic cylinder 7a is The rod end 71 of the other telescopic cylinder 7 b is coupled to the slide member 3 via the stay 31 while being coupled to the front of the slide rail 12 on the loading platform 1 side.

  The stay 31 is extended from the slide member 3 so as to protrude rearward, and the rod end 71 of the other telescopic cylinder 7b is connected to the rear end portion of the stay 31.

  Therefore, by moving these slide cylinders 3 along the slide rails 12 by expanding and contracting these telescopic cylinders 7a and 7b, the load receiving platform 5 can be arranged at the storage position and the work position. In this case, when the other telescopic cylinder 7b is first expanded and then one of the telescopic cylinders 7a is expanded and then contracted, the first telescopic cylinder 7a is first contracted and then the other telescopic cylinder 7b is contracted. I try to let them. The order of expansion and contraction of the telescopic cylinders 7a and 7b may be reversed or simultaneous.

  The stopper 8 is attached to the upper end of the stopper main body 81 and a stopper main body 81 which is supported at the rear end of the stay 31 by a support pin 82 so as to be vertically rotatable as shown in FIG. A pair of left and right rubber members 83 (see FIGS. 3 and 4) is provided.

  The stopper main body 81 is provided with an adjusting bolt 85 at a position facing the base end of the main body of the telescopic cylinder 7a. When the load receiving platform 5 side is disposed at the retracted position, the adjusting bolt 85 is provided with the telescopic cylinder 7a. When the base end of the main body is brought into contact with the front, the entire stopper 8 is rotated about the support pin 82 toward the lower rear side as indicated by a two-dot chain line in FIG.

  Further, the stopper 8 is normally biased in the direction of turning upward on the front side by a spring 86 connected to the stopper main body 81 and the stay 31 to normally maintain the state shown by the solid line in FIG. As described above, the base end of the main body of the telescopic cylinder 7a contacts the adjustment bolt 85, so that the entire stopper 8 rotates downward about the support pin 82 against the urging force of the spring 86. It is like that.

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

  First, in a state where the retractable load receiving device elevating device 2 is disposed at the storage position stored below the load carrier 1 as shown in FIG. 1, both the telescopic cylinders 7a and 7b are contracted. In this state, the base end of the main body of one of the telescopic cylinders 7a is in contact with the adjusting bolt 85, and the entire stopper 8 is rotated downward about the support pin 82 against the urging force of the spring 86. The front end portion of the load receiving platform 5 in which the rubber member 83 of the stopper 8 is folded is forcibly suppressed downward from above.

  Thus, by forcibly holding down the load receiving platform 5 with the stopper 8 in the storage position, the load receiving platform 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 7a and 7b are respectively extended. The extension of the telescopic cylinders 7a and 7b causes the left and right slide members 3 to move toward the rear end side of the cargo bed 2 along the left and right slide rails 12 via the slide mechanism, so that the entire retractable load carrier lifting device 2 is moved. Is slid to the rear end side of the loading platform 2 and placed at the work position (see FIG. 2).

  At this time, the telescopic cylinders 7a and 7b are configured such that the first telescopic cylinder 7a extends after the other telescopic cylinder 7b first expands. As a result, at the initial stage when the load receiving platform 5 moves from the retracted position to the rear working position, the base end of the main body of one of the telescopic cylinders 7a is separated from the adjustment bolt 85, and the stopper 8 causes the biasing force of the spring 86 to be separated. To separate the load receiving stand 5 from the load receiving stand 5.

  Then, when the retractable load receiving device elevating device 2 is arranged in the working position in this way, the intermediate member 52 is rotated together with the distal end side member 53 with respect to the proximal end side member 51 of the folded load receiving stand 5, The intermediate member 52 is deployed so as to be on the same horizontal plane as the proximal end member 51. Subsequently, the distal end side member 53 is rotated rearward so that the distal end side member 53 is deployed on the same horizontal plane as the intermediate member 52 and the proximal end side member 51. As a result, the loading platform 5 can move up and down between the ground and the floor of the loading platform 1 by the expansion and contraction operation of the lift cylinder, and the loading and unloading of the cargo between the ground and the loading platform 1 through the loading platform 5 by this lifting operation. Work can be done.

  Next, when the loading and unloading work is completed and the retractable load receiving device lifting / lowering device 2 is stored, the retractable load receiving device lifting / lowering device 2 is arranged from the working position to the retracted position by the reverse operation to the operation described above. . That is, in the working position, after placing the load receiving base 5 at a predetermined height for storing, the load receiving base 5 is folded in three, and the telescopic cylinders 7a and 7b are retracted in this state, thereby allowing the slide rail 12 to pass through the slide member 3. 1 and is slid forward and placed in the retracted position as shown in FIG.

  At this time, in the telescopic cylinders 7a and 7b, after the first telescopic cylinder 7a is first contracted, the other telescopic cylinder 7b is subsequently contracted. As a result, immediately before the load receiving platform 5 moves below the loading platform 2 from the working position and is disposed at the retracted position, the base end of the main body of one of the telescopic cylinders 7a comes into contact with the adjustment bolt 85 to support the stopper 8 as a whole. The front end of the load receiving base 5 folded by the rubber member 83 of the stopper 8 is forcibly suppressed downward from above by rotating downward about the 82.

  In this way, the stopper 8 is rotated downward immediately before the load receiving platform 5 is placed in the retracted position to hold the load receiving platform 5, so that the height of the load receiving platform 5 is slightly shifted in combination with the material of the rubber member 83 itself. Even so, the rubber member 83 of the stopper 8 can be brought into contact with the load receiving table 5 to suitably hold the load receiving table 5. As a result, it is possible to absorb the deviation of the height of the receiving platform 5 due to long-term use and the temporary deviation of the height of the receiving platform 5, and to ease the installation accuracy and facilitate the installation. Can do.

  As described above, when the order of expansion and contraction of the telescopic cylinders 7a and 7b is opposite to this, or at the same time, the timing at which the stopper 8 is separated from the load receiving base 5 or the timing at which the load receiving base 5 is suppressed changes. However, there is no particular problem.

  Further, by adjusting the screwing amount of the adjusting bolt 85 and changing the length, the operation timing of the stopper 8 due to the contact of the base end of the main body portion of one of the telescopic cylinders 7a can be adjusted. Even if the dimension between the base end of the main body of the telescopic cylinder 7a and the front end of the load receiving platform 5 is not constant depending on the model having different sizes, it can be covered.

  6 and 7 show another embodiment of the load receiving table storage device in the retractable load receiving device lifting apparatus of the present invention.

  In this load receiving base storage device, a rod (adjustment rod) 9 is provided on the stay 31 between the adjustment bolt 85 and the base end of the main body of one of the telescopic cylinders 7a.

  Specifically, a pipe 91 is horizontally provided on the stay 31 via an L-shaped attachment member 92, and the rod 9 is slidably provided in the pipe 91. Moreover, the rod 9 is provided in the said pipe 91 via the bush which is not shown in figure so that it may not fall out of the pipe 91 carelessly. In addition to the bush, a stopper or the like may be provided so that the rod 9 does not fall out of the pipe 91. Other configurations are the same as those of the above-described cargo storage device, and the description thereof is omitted.

  As a result, when the load receiving platform 5 is disposed at the retracted position, the base end of the main body of one of the telescopic cylinders 7a abuts against the adjusting bolt 85 via the rod 9 and resists the biasing force of the spring 86 so that the stopper 8 as a whole. Thus, the front end portion of the load receiving platform 5 in which the rubber member 83 of the stopper 8 is folded is forcibly suppressed downward from above.

  Further, at the initial stage when the load receiving platform 5 moves from the retracted position to the rear working position, the base end of the main body of one of the telescopic cylinders 7 a is separated from one end of the rod 9, whereby the rod 9 is biased by the biasing force of the spring 86. The stopper 8 is rotated upward while being moved forward in the pipe 91 so as to be separated from the load receiving platform 5.

  By configuring the load receiving unit storage device in this way, the same effect as the above described load receiving table storage device can be obtained, and the length of the rod 9 can be changed to change the main body base of one of the telescopic cylinders 7a. Even if the dimension between the end and the front end portion of the load receiving platform 5 is not constant and has a width depending on the models having different sizes, it can be covered, and versatility can be improved.

  In other words, the above-described adjustment bolt 85 alone is effective when the dimension between the base end of the one expansion cylinder 7a and the front end of the load receiving base 5 is relatively small in the retracted state. The thing provided with the bolt 85 and the rod 9 is effective when the width | variety of the said dimension is large in a retracted state.

  FIG. 8 shows still another embodiment of the consignment storage device.

  The load receiving table storage device 6 is provided with a rubber member 83 as a stopper 8 in a fixed manner. Specifically, for example, a stay 87 extends rearward from the side of the vehicle body frame 11, which is the front end side of the slide rail 12, so as not to interfere with the moving side of the slide member 3 and the like. A rubber member 83 is fixed to the rear end) so as to protrude rearward through the attachment member 83a. When the load receiving platform 5 moves to the retracted position, the front end portion of the load receiving platform 5 is elasticized by the rubber member 83. The load receiving base 5 is held by biting in while deforming the rubber member.

  FIG. 9 shows still another embodiment of the consignment storage device.

  The load receiving base storage device 6 is provided with a rubber member 83 shown in FIG. Specifically, for example, a stay 87 extends rearward from the side of the vehicle body frame 11, which is the front end side of the slide rail 12, so as not to interfere with the moving side of the slide member 3 and the like. A rubber member 83 is provided at the rear end) so as to be swingable about a horizontal shaft 83b via an attachment member 83a. When the load receiving platform 5 moves to the storage position, the front end of the load receiving platform 5 is connected to the rubber member 83. The rubber member is bitten while being deformed by its elasticity. As a result, the rubber member 83 is rotated downward while being pushed by the front end of the load receiving platform 5, and this rotation causes the rubber member 83 to hold and hold the load receiving platform 5 from the front or above. ing. A spring 88 is provided between the tip of the stay 87 and the attachment member 83a to urge the rubber member 83 to rotate rearward.

  Even with each of the above-described relatively simple receiving platform storage devices, the receiving platform 5 can be suitably held in a stable state while absorbing the deviation in the height direction of the receiving platform 5.

  Note that 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, not only the base end of the main body of the telescopic cylinder is brought into contact with the holding means, but a contact member may be provided at an appropriate position on the vehicle body side and the contact member may be brought into contact with the holding means.

  In addition, the load receiving platform 5 is not limited to a three-fold type, and may be a two-fold type or a three-fold type or more, and may be a type that is not folded.

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 storage position. 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 top view which shows the load receiving stand storage apparatus of the state which the expansion-contraction cylinder retracted. It is a top view which shows the load receiving stand storage apparatus of the state which the expansion-contraction cylinder extended. It is an enlarged side view which shows the structure of a stopper (holding means). It is a top view which shows other embodiment of a cargo receiving stand storage apparatus. It is a side view which shows other embodiment of a goods receiving stand storage apparatus. It is a side view which shows other embodiment of a goods receiving stand storage apparatus. It is a side view which shows other embodiment of a goods receiving stand storage apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Loading platform 2 Retractable loading platform lifting device 3 Slide member 5 Loading platform 6 Loading platform storage devices 7a, 7b Telescopic cylinder 8 Stopper (holding means)
83 Rubber member 85 Adjustment bolt

Claims (4)

The loading platform is provided on the loading platform through a link mechanism so that the loading platform can be raised and lowered, and the loading platform side including the link mechanism and the lifting mechanism is moved along the slide rail through the slide member and the storage position below the loading platform and the work behind the loading platform. In the retractable load receiving device lifting and lowering device configured to be slidable back and forth between positions, the load receiving table is provided with the telescopic rods opposite to each other, and each rod end is connected to the vehicle body side and the slide member side. The pair of telescopic cylinders are slidable by an expansion / contraction operation, and the main body portion of one of the expansion cylinders is disposed on the slide member side when the load receiving side is disposed at the retracted position by the contraction operation of the expansion / contraction cylinders. A holding hand that rotates downward by directly or indirectly contacting the base end and holds the load receiving table by pressing the load receiving table. Receiving platform storage device in receiving platform lifting device, characterized in that is provided. The body portion proximal end of the telescopic cylinder is in contact with the part of the holding means via the adjustment bolt, according to claim 1 Symbol mounting operation timing of the holding means by the adjusting bolt is characterized in that it is configured to be adjusted The stowage receiving device in the retractable receiving device lifting device. The base end of the main body of the telescopic cylinder is in contact with a part of the holding means via an adjustment bolt and an adjustment rod, and the operation timing of the holding means can be adjusted by the adjustment bolt and / or the adjustment rod. receiving platform storage device in a retractable receiving platform lifting device according to claim 1 Symbol mounting, characterized in that. 4. The load receiving table storage device in the retractable load receiving device lifting apparatus according to claim 1 , wherein a portion of the holding means that presses the load receiving table is formed of a rubber member.

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