JP5546393B2 - Loading platform lifting device - Google Patents

Description

  The present invention relates to a load receiving table elevating device that is provided in a vehicle and used for loading and unloading loads.

  Conventionally, a rear surface of a large vehicle such as a truck is provided with a reflector of a predetermined size (in the present invention, a reflector) in order to prevent an accidental entry into the vehicle. In a vehicle equipped with an underfloor retractable load receiving device elevating device at the lower part of the rear end, the reflecting plate is a folded load receiving device (in the present invention, the load receiving device elevating device). It is attached to the rear end surface of the platform) via a mounting stay that can be raised and lowered. The mounting stay is urged in a standing direction by a torsion bar, so that when the platform is folded, the torsion bar erects the mounting stay so that the reflector is directed toward the rear of the vehicle, and when the platform is deployed, the load receiving platform is The mounting stay is laid down against the urging force of the torsion bar, the interference between the deployed platform and the reflector is suppressed, and the platform is made thinner.

Japanese Patent No. 4322862

  However, since the mounting stay is raised by the torsion bar in the above-described load receiving platform lifting device, if the force to rise due to aging of the torsion bar is weakened, the mounting stay remains lying down even if the platform is folded. Thus, there is a problem that the reflecting plate faces the lower side of the truck, and the following vehicle cannot know the existence of the truck.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a load receiving table lifting / lowering device capable of raising a reflecting plate in conjunction with a folding operation of a platform.

  In order to achieve the above object, a load receiving platform lifting apparatus according to the present invention includes a platform provided on a vehicle so as to be lifted and lowered via a lifting mechanism, and a reflector support mechanism provided on the platform and supporting a reflector. The platform is configured such that the platform can be folded by a plurality of cargo receptacles, and the reflector support mechanism is a reflection that is rotatably supported by one of the neighboring cargo receptacles. It is characterized by comprising a plate stay, and a link having both ends rotatably connected to the reflector plate stay and the other load receiving base.

  According to the load receiving platform lifting apparatus having such a configuration, the link stays up so that the link stands up in conjunction with the folding of the platform, so that the reflector stay stays up reliably in the folded state of the platform. It is possible to prevent the subsequent vehicle from being able to visually recognize the reflector.

  According to the load receiving platform lifting apparatus having such a configuration, it is possible to prevent the subsequent vehicle from being able to visually recognize the reflector.

It is a side view of the load receiving table raising / lowering device by one Embodiment of this invention. It is a side view which shows the use condition which slides a load receiving stand from the state of FIG. 1, and expands and raises / lowers a load receiving stand after reaching a predetermined slide rear end position (extension position). It is a top view of a slide mechanism which shows the state where a slide cylinder contracted most. FIG. 4 is a side view of FIG. 3, (a) is a schematic side view showing a state in which the slide cylinder is most contracted, and (b) is a schematic side view showing a state in which the slide cylinder is most extended. It is the side view which abbreviate | omitted the raising / lowering device and the receiving stand from FIG. 2, and expanded the slide rail vicinity. (A) is the figure which expanded the A section of FIG. 5, (b) is the top view. It is the enlarged view which looked at the vertical cross section of the last bracket in FIG. 2 from the back side. It is a perspective view which shows the 1st slide member etc. which are attached to a support plate and its front side (front side of the vehicle V), etc. in an exploded state. It is the expanded sectional view which provided the 1st slide member in the slide rail. It is a perspective view which shows the 2nd slide member etc. which are attached to the support plate 21 and its back side (back side of the vehicle V), etc. in an exploded state. It is the expanded sectional view which provided the 2nd slide member in the slide rail. It is a top view of a receiving stand. (A) is the sectional view on the AA line of FIG. 12, (b) is the sectional view on the BB line of FIG. It is sectional drawing which shows expansion | deployment and folding operation | movement of a receiving stand, (a) is a folding state, (b) is a state between a folding state and a front part receiving stand standing state, (c) is a front part. It is the figure which each showed the standing state of the receiving stand. It is sectional drawing which shows the expansion | deployment / folding operation | movement of a load receiving stand, (d) is the state between a standing state and an unfolding state, (e) is an unfolding state, (f) swung the tip of the load receiving stand downward. It is the figure which showed each state. It is the principal part enlarged view of the cargo receiving stand raising / lowering apparatus which shows the other Example of this invention, (a) is a folded state, (b) is the figure which each showed the unfolded state.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a side view of a load receiving table lifting apparatus according to an embodiment of the present invention. This state represents a state in which the load receiving platform lifting device A is stored at a position (storage position) below the rear portion of the vehicle V, that is, a travelable state. On the other hand, FIG. 2 slides the entire load receiving table lifting device A from the state of FIG. 1 to the rear of the vehicle V, reaches a predetermined sliding rear end position (extension position), and then expands and lowers the platform P. It is a side view which shows a use condition.

  A cargo box B is mounted on a chassis frame V1 of the vehicle V, and a subframe V2 for reinforcing the cargo box B is disposed on the lower surface of the cargo box B, and the subframe V2 is the chassis. It is arranged so as to overlap the frame V1. A retractable load receiving table elevating device A is attached below the rear end of the chassis frame V1.

  The load receiving table lifting device A includes a slide mechanism S disposed on the chassis frame V1 and a platform P connected to the slide mechanism S via a lifting mechanism L.

  The load receiving platform lifting / lowering device A can load / unload a load on the cargo box B by raising / lowering the platform P behind the cargo box B (right side in FIG. 1).

  Hereinafter, the slide mechanism S will be described with reference to FIGS.

  In FIG. 1, a pair of left and right fixed support portions 1 provided in the left-right direction in the vehicle width direction of the load receiving platform lifting / lowering device A includes a pair of left and right slide rails 11 extending horizontally in the longitudinal direction of the vehicle V and a pair of left and right slide rails A plurality of (three in this example) mounting brackets 12 for fixing 11 to the chassis frame V1 and a connecting member 13 including a square pipe 13a that connects the front end portions of the pair of left and right slide rails 11. . The slide rail 11 and each mounting bracket 12 are fastened by two sets of bolts and nuts 12a. A support plate 21 is supported on the slide rail 11 so as to be slidable in the longitudinal direction of the vehicle V.

  FIG. 7 is a view of a vertical section of the rearmost mounting bracket 12 in FIG. 1 as viewed from the rear side, and the slide rail 11 is an aluminum die-cast member having a cross-sectional shape as shown in the drawing. A hollow guide portion 11a extending in the horizontal direction is formed below the inside of the slide rail 11, and a slide member 22 connected to the support plate 21 is maintained with a slight gap between the guide rail 11a and the inner wall surface. It is slidably mounted in the guide portion 11a in the front-rear direction of the vehicle V. And the slit 11b which lets the support plate 21 pass is formed in the longitudinal direction in the center of the bottom part of the guide part 11a. A lower inclined surface 11c having a downward slope is formed at a lower portion in the guide portion 11a in a direction away from the slit 11b to the left and right.

  On the other hand, the slide member 22 includes a first slide member 220 on the front side and a second slide member 221 on the rear side (see FIG. 5). Hereinafter, the detailed structures of the first slide member 220 and the second slide member 221 will be described with reference to FIGS. FIG. 8 is a perspective view showing the support plate 21 and the first slide member 220 and the like attached to the front side (the front side of the vehicle V) in an exploded state. FIG. 9 shows the first slide member 220 provided on the slide rail 11. FIG. FIG. 10 is a perspective view showing the support plate 21 and the second slide member 221 and the like attached to the rear side (the rear side of the vehicle V) in an exploded state, and FIG. 11 provides the second slide member 221 on the slide rail 11. FIG.

  The first slide member 220 is provided on the left and right sides of the support plate 21 and comes into contact with the upper surface 11d in the guide portion 11a by a load of the platform P or the like. That is, a round hole 21a is formed in the front portion above the support plate 21, and a cylindrical iron pin 222 is inserted therein. In the radial direction of the pin 222, a pair of left and right through screw holes 222a are formed. On the other hand, the pair of left and right first slide members 220 is formed of a resin mold and has a rectangular parallelepiped block shape. The first slide member 220 is formed with a first through hole 220a having an inner diameter matching the outer diameter of the pin 222 and a second through hole 220b orthogonal to the first through hole 220a from below. By fitting the pair of first slide members 220 to the pins 222, inserting bolts 223a into the second through holes 220b and screwing them into the through screw holes 222a of the pins 222, the first slide members 220 and the pins 222 are inserted. And are fixed to the support plate 21. The bolt 223a is inserted so tightly as to leave a minute gap with respect to the second through hole 220b, and the movement of the pin in the axial direction and the rotation around the axis are thereby restricted. . Further, the upper surface of the first slide member 220 has a shape along the upper surface 11 d in the guide portion 11 a of the slide rail 11.

  The second slide member 221 is provided on the left and right sides of the support plate 21 and is composed of a main body part 224 and a sliding part 225, respectively, so as to come into contact with the lower inclined surface 11c of the guide part 11a by a load of the platform P or the like. It has become. That is, a round hole 21b is formed in the rear portion above the support plate 21, and a cylindrical iron pin 226 is inserted therein. The main body 224 is a rectangular parallelepiped block made of iron-based metal, and has a required rigidity so as not to be deformed even when the weight of the platform P and other members is loaded on the support plate 21. Yes. It should be noted that any metal material other than the iron-based material having the required rigidity can be used. The main body 224 includes a first through hole 224a having an inner diameter that matches the outer diameter of the pin, a second through hole 224b that is orthogonal to the first through hole from above, and a pair of bottomed screw holes that open on the lower surface. 224c is formed. The pair of left and right sliding portions 225 is a plate-like member formed of a resin mold, and the lower surface 225a is inclined so that the thickness increases outward with respect to the upper surface attached horizontally. The sliding portion 225 is formed with a pair of counterbore through holes 225b. The pair of sliding portions 225 is fixed to the main body portion 224 by passing the bolts 223b through the counterbore through holes 225b and screwing them into the bottomed screw holes 224c. The head of the bolt 223b is housed in the counterbore through hole 225b and retracted from the lower surface 225a of the sliding portion 225. Further, by fitting the pair of left and right body portions 224 to which the sliding portions 225 are respectively attached to the pins 226, inserting bolts 223 c into the second through holes 224 b and screwing them into the through screw holes 226 a of the pins 226. The second slide member 221 and the pin 226 are prevented from coming off from each other, and both are fixed to the support plate 21. It should be noted that the bolt 223c is inserted so tightly that the head thereof leaves a minute gap with respect to the second through hole 224b, thereby restricting movement of the pin 226 in the axial direction and rotation around the axis. Yes. The lower surface 225 a and the side surface 225 c of the sliding part have a shape along the inner surface of the lower part of the guide part 11 a of the slide rail 11. In particular, the lower surface 225a is inclined downward toward each other so as to coincide with the lower inclined surface 11c of the guide portion 11a.

  The pair of left and right support plates 21 penetrates a cross member 23 formed of a square pipe 23a extending horizontally in the vehicle width direction (note that the side pipes 23a are stacked in three stages for reinforcement at both end portions. Only one is installed in the direction), and they are welded together. A support bracket 24 is integrally welded to the cross member 23 outside the support plate 21 in the vehicle width direction. A pair of left and right support brackets 24 are also provided. The lower portions of the pair of left and right support plates 21 are connected by a channel member 25 (see FIGS. 3 and 4).

  The slide member 22, the connecting member 13, and the support plate 21 constitute a movable side support portion 2 that can slide in the front-rear direction of the vehicle V with respect to the fixed side support portion 1.

  Next, the slide drive device 3 (slide cylinder 30) for sliding the load receiving table lifting device A between the retracted position and the extended position will be described. FIG. 3 is a plan view of the slide mechanism showing a state where the slide cylinder 30 is contracted most. 4 is a side view of FIG. 3, FIG. 4 (a) is a schematic side view showing a state in which the slide cylinder 30 is most contracted, and FIG. 4 (b) is a view in which the slide cylinder 30 is most extended. It is a schematic side view which shows a state.

  In FIG. 3, the slide cylinder 30 includes a pair of left and right double-acting cylinders 301 disposed between the left and right slide rails 11 in the vehicle width direction. The cylinder main bodies 301 a of the left and right cylinders 301 are overlapped with their front and rear ends arranged in opposite directions, and are integrally connected by a pair of front and rear joints 302.

  In the cylinder 301 on the right side of the vehicle, a boss portion 301c as a connecting portion formed integrally with the tip end portion of the piston rod 301b is attached to the attachment plate 14 by a pin 14a. The mounting plate 14 is fixed to a substantially middle portion of the connecting member 13 in the vehicle width direction. The cylinder 301 on the left side of the vehicle has a boss portion 301c of a piston rod 301b attached to a mounting base 26 extending in the vehicle front-rear direction by a pin 26a. The mounting base 26 has a rear end portion fixed to a substantially intermediate portion of the channel member 25 in the vehicle width direction, and a front end portion fixed to a substantially intermediate portion of the cross member 23 in the vehicle width direction. Yes.

  With the above configuration, the support plate 21 can be slid relative to the slide rail 11 to the retracted position shown in FIG. Further, by extending the pair of cylinders 301 together, the support plate 21 can be slid with respect to the slide rail 11 to the extended position shown in FIG.

  As shown in FIG. 1, the upper part of the auxiliary link 41 is attached to the support bracket 24 via a pin 40a so as to be rotatable within a certain range. An upper arm 42 is rotatably attached to a central portion of the auxiliary link 41 via a pin 40b. A base end of a lift cylinder 44, which is a lifting drive device, is below the upper arm 42 and below the auxiliary link 41. Is rotatably attached by a pin 40c. The tip of the lift cylinder 44 is connected to a predetermined position of the upper arm 42 via a pin 40d, and applies torque to the upper arm 42 by an expansion / contraction operation.

  The lower arm 43 is rotatably attached to the support bracket 24 via a pin 40e.

  Platforms P are horizontally attached to the tips of the upper arm 42 and the lower arm 43 by pins 40f and 40g, and the upper arm 42 and the lower arm 43 have a quadrilateral shape connecting their fulcrums and action points. Constructs parallel links.

  The auxiliary link 41, the upper arm 42, the lift cylinder 44, and the lower arm 43 are provided in a pair of left and right, and constitute an arm type lifting mechanism L.

  Further, a stopper bolt 42 a is attached to the upper surface side of the upper arm 42 so as to protrude upward. The stopper bolt 42a contacts the support bracket 24, thereby preventing the upper arm 42 from rotating counterclockwise beyond the allowable rotation range.

  The tip side (platform P) is moved up and down by the expansion and contraction operation of the lift cylinder 44. That is, at the rear of the chassis frame V1, the platform P corresponds to the floor of the cargo box B on the chassis frame V1 (that is, the same height as the floor surface of the cargo box B), and the platform P is grounded to the ground. It is possible to move up and down between the ground contact position.

  In addition, the auxiliary cylinder 41 is further rotated by further contracting the lift cylinder 44 while the base of the platform P is grounded, and the upper arm 42 is moved to the rear side of the vehicle, whereby the tip of the platform P is grounded to the ground. It can be made into the state made into. In this case, the upper surface of the platform P (the load receiving surface on which the load is placed) is gently inclined downward.

  The platform P includes a base-side load receiving base (hereinafter referred to as a base load receiving base 51) that is horizontally attached to the distal ends of the upper arm 42 and the lower arm 43, and a front-side load receiving that is foldable and unfoldable. Two cradles adjacent to the base (hereinafter referred to as the front part cradle 53) are provided. At the time of storage, the front receiving platform 53 is folded on the base receiving platform 51. In use, the front part receiving platform 53 is deployed, and a continuous receiving surface from the base receiving base 51 to the front receiving platform 53 is formed.

  The configuration of the platform P will be further described.

  As described above, the platform P has the front load receiving platform 53 connected to the base load receiving platform 51 via the hinge member 55.

  The base load receiving platform 51 and the hinge member 55 are connected by a shaft 55a so as to be rotatable, and the hinge member 55 and the front load receiving platform 53 are connected by a shaft 55b so as to be rotatable. As a result, the front load receiving base 53 can be rotated around the shaft centers of both the shafts 55 a and 55 b with respect to the base load receiving base 51, and the front load receiving base 53 is folded with respect to the base load receiving base 51. be able to.

  Referring to FIG. 1, a fold detection switch LS <b> 1 is attached to a side surface of the base load receiving platform 51. The fold detection switch LS1 is connected to a control device (not shown) that controls the operation of the load receiving table lifting device A, and is turned on when the dog corresponding to the fold detection switch LS1 approaches. It is configured. The dog for operating the fold detection switch LS1 is provided in the front part receiving platform 53, and among the side guards 8 that prevent the load placed on the receiving surface from falling to the side of the platform P, the front receiving base 53 is provided. Is folded and stacked on the upper arm 42, the portion close to the fold detection switch LS1 is also used, and the fold detection switch LS1 is configured to fold the front load receiving stand 53 to the state shown in FIG. And the control device recognizes that the folding of the platform P has been completed.

  Next, the structure of the overhang position adjusting device 61 that regulates the slide backward position (vehicle rear side) in the slide operation by the slide mechanism S will be described. FIG. 5 is an enlarged side view of the vicinity of the slide rail 11 by omitting the lifting mechanism L and the platform P from FIG. FIG. 6A is an enlarged view of the portion A in FIG. 5, and FIG. 6B is a plan view thereof. 5 and 6, a rectangular parallelepiped adjusting member 610 is attached to a predetermined position behind the slide rail 11 by a pair of bolts 611a and nuts 611b penetrating therethrough. The heads of the bolts 611a and 611b of the bolts 611a and nuts 611b are inserted into grooves 11e that are formed through the side surface of the slide rail 11 in the front-rear direction. In addition, the nut 611b can be loosened and moved back and forth.

  Further, in FIG. 6, the front side surface of the adjustment member 610 is provided with a stopper bolt 612 and a bolt 613 that serves as a detection dog of the proximity sensor LS <b> 2 (hatched for convenience of identification with the stopper bolt 612). However, it is attached to the front side so that the protrusion length can be adjusted. On the other hand, a stopper member 614 is attached to the support plate 21 with bolts and nuts. The stopper member 614 is integrally formed with a contact portion 614a with a stopper bolt.

  In the overhang position adjusting device 61 described above, the movable side support portion 2 slides backward and the abutment portion 614a of the stopper member 614 attached to the support plate 21 is brought into contact with the stopper bolt 612 to stop the slide. Become. Therefore, the slide rear end position can be variably restricted by adjusting the position of the adjustment member 610 back and forth.

  Further, when the load receiving platform lifting / lowering device A is slid rearward from the platform P stored state of FIG. 1 and the contact portion 614a contacts the stopper bolt 612, the proximity sensor LS2 detects the bolt 613. Based on this detection signal, the extension operation of the slide cylinder 30 of the slide mechanism S is stopped, and the contraction operation of the lift cylinder 44 as the next operation is performed. That is, the proximity sensor LS2 detects the timing when the operation of the lift cylinder 44 starts from the slide operation.

  Further, a roller mounting plate 71 is attached to each of the pair of left and right support plates 21 so as to protrude rearward, and a guide roller 72 is rotatably attached to the rear end thereof. The tip of the front part receiving platform 53 can be placed on the guide roller 72. The guide roller 72 has a function of rotating the front load receiving base 53 in the standing direction when the load receiving base lifting device A is retracted from the state of FIG. 1 and the upper arm 42 and the lower arm 43 are rotated downward. On the contrary, after use, the front part receiving platform 53 is made to lean against the upper arm 42 and the lower arm 43 so that the front receiving stage 53 is automatically folded.

  As shown in FIG. 3, a switch box 73 containing an operation switch or the like for operating the cargo receiver lifting device A is attached to the left side of the cross member 23 in the traveling direction of the vehicle V.

  A case 74 containing a power unit containing a hydraulic pump, a valve, a control device, and the like is attached to the other side of the cross member 23 (on the right side in the traveling direction of the vehicle V).

  In the load receiving platform lifting / lowering apparatus A having the above configuration, the operation until the platform P is in the deployed state from the storage position will be described.

  When the slide cylinder 30 is extended from the state of FIG. 1, the folded platform P moves to the rear of the vehicle. When the lift cylinder 44 is shortened from this state, the parallel link rotates downward, and the base load receiving platform 51 moves downward. Thus, when the parallel link rotates downward, the front load receiving base 53 is placed on the guide roller 72. That is, the surface (load receiving surface) of the front load receiving stand 53 is in contact with the guide roller 72 from above. Further, since the front load receiving base 53 is rotatable with respect to the base load receiving base 51 by the hinge member 55, the front load receiving base 51 which is in a horizontal posture in the front-rear direction is moved by the downward movement of the base load receiving base 51. The table 53 gradually assumes an inclined posture. As a result, the front load receiving base 53 is supported from the front side of the vehicle by the guide roller 72 while being in a folded state, and assumes an inclined posture.

  Then, the operator rotates the front part receiving platform 53 to the rear of the vehicle by the hinge part 55, and grounds the front part receiving platform 53 to the ground. Thereby, the platform P will be in an unfolded state.

  The operation until the platform P in the unfolded state is brought into the retracted state is opposite to this, and the worker rotates the front load receiving base 53 forward and leans against the guide roller 72. Then, the lift cylinder 44 is extended to rotate the parallel link upward. At this time, the front load receiving base 53 is automatically rotated with respect to the base load receiving base 51 while being supported by the guide roller 72, and the front load receiving base 53 in the inclined posture gradually becomes a horizontal posture. When it changes and becomes a substantially horizontal posture, the folding detection switch LS1 is turned ON. Then, the slide cylinder 30 is shortened, and the platform P is moved forward of the vehicle until it is in the retracted state.

  Next, the reflector support mechanism 9 of the present invention will be described with reference to FIGS. FIG. 12 is a plan view of the load receiving table. FIG. 13A is a cross-sectional view taken along the line AA in FIG. 12 and shows a cross section of the reflector support mechanism 9 at the center. FIG. 12B is a cross-sectional view taken along the line BB in FIG. 12 and shows a cross-section of the side reflector support mechanism 9.

  The reflector support mechanism 9 is composed of a total of three members, a pair of left and right at the center and side.

Hereinafter, the reflector support mechanism 9 in the center will be described.
The reflector support mechanism 9 in the center is disposed between a pair of reinforcing members 53 a disposed on the back surface of the front load receiving base 53.

  An L-shaped angle member 91 is fixed to the lower end of the base load receiving base 51 with a bolt, and a reflector stay 93 is rotatably supported on the angle member 91 via a first hinge 92. The reflector stay 93 is made of a plate material, and a reflector Ra is attached to the rear surface of the vehicle. The size of the reflector stay 93 is such that the reflector Ra can be disposed.

One end of a link 95a is rotatably attached to the upper portion of the reflector stay 93 via a second hinge 94, and the other end of the link 95a is rotatable to the front load receiving base 53 via a third hinge 96. It is attached. The link 95a is provided with a bent portion in order to avoid the torsion bar 53c for assisting the standing load receiving stand 53 to stand. The 3rd hinge 96 is provided in the back surface of the front part receiving stand 53, and is fixed to the dovetail groove 53b for connecting the front receiving stage 53 and the said reinforcement member 53a with a volt | bolt nut.
In the folded state of the platform P, the first hinge 92 is lower than the hinge member shaft 55a and rearward of the vehicle, the second hinge 94 is rearward of the vehicle than the shaft 55b, and the third hinge 96 is closer to the vehicle than the hinge member. The position is arranged at a position away from the rear end of the front load receiving base 53 by a distance substantially the same as the half of the height of the reflector stay 93 in the front. A pair of left and right first to third hinges and a link 95a are provided at both ends of the reflector stay 93.

  The reflecting plate support mechanism 9 on the side has the same basic structure as the reflecting plate support mechanism 9 on the center, and the difference is that the width of the reflecting plate stay 93 is different from the width on which the small reflecting plate Rb can be attached. A dimension and a dimension that is outside the reinforcing member 53a of the front load receiving base 53 in the vehicle width direction and does not protrude from both ends of the load receiving base, and first to third hinges and a link (link 95b) And a point where the link 95b is not provided with a bent portion (see FIGS. 12 and 13B).

The operation of the reflector support mechanism 9 when unfolding the platform P from the folded state will be described with reference to FIGS. 14 and 15 with reference to the reflector support mechanism 9 at the center. The side reflector supporting mechanism 9 operates in the same manner as the central reflector supporting mechanism 9, and the description thereof is omitted.
FIG. 14A is a view showing a state in which the front part receiving pedestal 53 is folded, FIG. 14B is a view in which the front part receiving pedestal 53 is standing, and FIG. FIG. 15D is a diagram in the middle of deployment, and FIG. 15E is a diagram of the deployed state. FIG. 15 (f) is a diagram showing a state where the tip of the front load receiving base 53 is rotated downward in order to use the load receiving base for bridging between the load box B and the platform provided in the facility. In addition, the front-end | tip part of the link mechanism and the front part receiving stand 53 is abbreviate | omitted and shown for description.

  When the front part receiving platform 53 of the folded platform P is started to be deployed rearward of the vehicle (FIG. 14B), the third hinge 96 moves upward with the rotation about the shaft 55a of the front receiving base 53. Move to the rear of the vehicle. At this time, since the second hinge 94 is located on the vehicle rear side with respect to the straight line connecting the third hinge 96 and the first hinge 92, the reflector stay 93 starts to fall down on the vehicle rear side.

  When the front load receiving stand 53 stands up, it is next rotated around the shaft 55b to the unfolded state. Also at this time, since the second hinge 94 is located on the vehicle rear side with respect to the straight line connecting the third hinge 96 and the first hinge 92, the reflector stay 93 continues to fall on the vehicle rear side. However, since the upper end of the reflecting plate stay 93 is connected to the front part receiving platform 53 by the link 95 a, the reflector stay 93 falls while being supported by the front receiving base 53.

  Between the standing state and the unfolded state, the link 95a is approximately half the height of the reflector stay 93, and its mounting position is the height dimension of the reflector stay 93 from the rear end of the front load receiver 53. Therefore, it starts to fold along the back surface of the reflector plate stay 93 (the surface on which the reflector plate Ra is not attached) (see FIG. 15D).

Thereafter, when the front load receiving base 53 has finished rotating to the unfolded state (FIG. 15E), the first hinge 92, the third hinge 96, and the second hinge 94 are isosceles due to the above dimensions. The reflecting plate stays 93 arranged so as to form a triangle and folded are arranged along the lower surface of the developed front part receiving platform 53.
At this time, since the reflecting plate stay 93 is supported by the front part receiving platform 53 by the link 95a, the reflecting plate stay 93 is prevented from rotating around the first hinge 92. Thereby, it is possible to prevent the reflecting plate stay 93 from rotating due to an impact when the load is placed on the receiving surface, and to prevent the reflecting plate Ra from contacting the ground.
Further, as shown in FIG. 15 (e), on the platform P in the unfolded state, the third hinge 96 is placed at a position close to a straight line (indicated by a one-dot chain line in the figure) connecting the center point of the shaft 55b and the second hinge 94. Since it arrange | positions, when the front part receiving stand 53 rotates around the axis | shaft 55b, the moving amount | distance in the direction in which the 3rd hinge 96 approaches the 2nd hinge 94 can be made small. Since the amount of movement of the second hinge 94 connected to the third hinge by the link 95a is also small, the amount of rotation of the reflector stay 93 is gentler than the amount of rotation of the front load receiving base 53. As a result, the reflector stay 93 is not greatly shaken by the end of the unfolding operation of the leading part receiving platform 53 or the shaking of the leading part receiving platform 93 due to an impact when a load is placed, and the reflecting plate stay 93 (reflecting plate Ra). , Rb) can be prevented from coming into contact with the ground.

  Since the second hinge 94 is located on the vehicle rear side with respect to the straight line connecting the third hinge 96 and the first hinge 92, the axis 55a and the axis 55b are reversed when the platform P is deployed. Even when the case is rotated around both the shaft 55a and the shaft 55b, the reflecting plate stay 93 always falls on the rear side of the vehicle.

  Next, the operation of the reflector support mechanism 9 when the platform P is folded from the unfolded state will be described.

  When the leading part receiving platform 53 of the platform P in the unfolded state shown in FIG. 15 (e) starts to be folded toward the front side of the vehicle, the third hinge 96 starts moving toward the upper side of the vehicle. At this time, the link 95a connected to the front part receiving platform 53 by the third hinge 96 moves upward. At the same time, the relative posture of the link 95a with respect to the reflector stay 93 changes in the opening direction (FIG. 15 (d)). Then, since the reflecting plate stay 93 is connected to the end portion of the link 95a via the second hinge 94, the reflecting plate stay 93 starts to stand up.

  As shown in FIG. 14 (c), from the time when the front part receiving platform 53 stands up to the folded state, it rotates around the shaft 55 a of the hinge member 55. At this time, the third hinge 96 moves downward in the vehicle, but also moves forward of the vehicle, so the link 95a also moves forward of the vehicle. Since the reflecting plate stay 93 is connected to the link 95a via the second hinge, the upper end of the reflecting plate stay 93 also moves to the front side of the vehicle. Since the lower end of the reflector plate stay 93 is fixed to the base load receiving platform 51 by the first hinge, the reflector plate 93 erects its upper end around the first hinge (see FIG. 14B). When the folding of the platform P is completed, the reflector stay 93 is held in an upright position along the rear surface of the platform P (FIG. 14A).

  Regardless of whether the platform P is in the folded or unfolded state or the platform P is being unfolded or folded, the upper end of the reflector stay 93 is always supported by the front load receiving base 53 via the link 95a. Therefore, the reflector stay 93 takes a posture in accordance with the postures of the base load receiving platform 51 and the front load receiving platform 53. Accordingly, the reflector stay 93 can be rotated upright in conjunction with the folding operation of the platform P (rotation of the front load receiving base 53), and the reflector stay 93 is placed in an upright position in the folded state. can do. Therefore, in the retracted state, the reflecting plate Ra can be prevented from facing in a direction other than the rear, and the function as the reflecting plate Ra can be achieved. Further, even if an external force is applied to the platform P or the like, the reflector stay 93 does not swing due to the external force. Therefore, in the retracted state, the reflecting plate Ra can be prevented from facing in a direction other than the rear, and the function as the reflecting plate Ra can be performed, and the reflecting plate Ra is in contact with the ground or the like and is damaged. Can be suppressed.

  FIG. 15 (f) is a diagram showing a state in which the tip of the front load receiving table 53 is rotated downward in order to use the load receiving table for bridging between the load box B and the platform provided in the facility. . As described above, even when the tip of the front part receiving platform 53 is rotated downward, the reflector stay 93 is arranged along the lower surface of the front part receiving platform 53. Further, the reflector stay 93 supported by the base load receiving platform 51 so as to be able to move up and down is connected to the back surface of the front load receiving platform 53 by a link 95a (95b). This prevents the reflector stay 93 from shaking. Even in this state, since the third hinge 96 is located at a position close to a straight line (indicated by a one-dot chain line in the figure) connecting the center point of the shaft 55b and the second hinge 94, The reflector stay 93 is not greatly shaken with respect to the amount of shaking of the front load receiving table 93 due to the impact.

The present invention is not limited to the above embodiment.
In the above embodiment, the case where the reflecting plate support mechanism 9 is provided on the two-folded platform P has been described, but the reflecting plate support mechanism 9 may be provided on the three-folded platform P. At this time, the first hinge 92 (angle member 91) is fixed to the load receiving table on the base side (lifting mechanism side) of the two load receiving tables adjacent to the reflector supporting mechanism 9 described in the above embodiment, and the base The third hinge 96 may be fixed to the back surface of the load receiving table that is rotatably provided on the side load receiving table. For example, in a load receiving base consisting of three pieces, a base receiving stand, an intermediate receiving stand (provided to be deployable with respect to the base receiving stand), and a foremost receiving stand (provided to be deployable with respect to the intermediate receiving stand), If it is between the base part receiving platform and the intermediate part receiving platform, the first hinge 92 is used for the base receiving platform, the third hinge 96 is used for the intermediate receiving platform, and if it is between the intermediate receiving platform and the earliest part receiving platform. The first hinge 92 and the third hinge 96 may be fixed to the intermediate load receiving base and the frontmost load receiving stand, respectively. The reflector stay 93 and the link 95 are configured to be rotatable using hinges that are generally distributed, but may be configured to be rotatable by other structures.

Moreover, in the said Example, although the reflecting plate stay 93 was supported rotatably at the base part receiving stand 51, the said reflecting plate stay 93 and the front part receiving stand 53 were connected by the link 95a (link 95b), FIG. As shown in FIG. 4, the reflector plate stay 93 ′ may be rotatably supported on the front load receiving base 53, and the reflector plate stay 93 ′ and the base load receiving base 51 may be connected by a link 95 ′. In this case, since the lower part of the reflector stay 93 ′ is connected to the base load receiving base 51 even if the vehicle jumps up during traveling, it is possible to prevent the reflector stay 93 ′ from being raised and jumped up. The reflectors Ra and Rb can be surely directed toward the rear of the vehicle when folded. FIG. 16 is an enlarged view of a main part of the cargo receiving table lifting device, where (a) shows a folded state and (b) shows a developed state.
The elevating mechanism L is a parallel link with two arms, but other elevating mechanisms (for example, a vertical elevating type) may be used.

A Loading platform lifting device P Platform 51 Base loading platform (loading platform)
53 Front cargo cradle
9 Reflector support mechanism 92 First hinge 93 Reflector stay 94 Second hinge 95a Link 95b Link 96 Third hinge Ra Reflector (central part)
Rb reflector (side)

Claims (1)

A platform provided on the vehicle so as to be able to be lifted and lowered via a lifting mechanism;
In the platform receiving and lifting device provided with the reflector and provided with a reflector support mechanism for supporting the reflector,
The platform is configured to be foldable by a plurality of receiving platforms,
The reflector support mechanism is
A reflector stay that is rotatably supported on one of the adjacent load receiving tables;
A load receiving table elevating device comprising: a link having both ends rotatably connected to the reflecting plate stay and the other load receiving table.

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