JP5869962B2 - Loading platform and loading platform lifting device - Google Patents

Description

  The present invention relates to an improvement of a load receiving platform and a load receiving platform lifting / lowering device that moves the load receiving platform up and down.

  A load receiving platform used for loading and unloading loads is connected to an elevating mechanism via hinges provided on both sides of the base end, and the load receiving platform is cantilevered in a substantially horizontal protruding position to load and unload loads. The present applicant has already proposed a novel cargo cradle and a cargo cradle raising / lowering device that are erected substantially vertically and held in the retracted position (see Patent Document 1 below).

Japanese Patent Application No. 2011-281349

  By the way, the proposed load receiving table is cantilevered and supported by the lifting mechanism in a substantially horizontal protruding position to load and unload the load on the load receiving table, and after the loading and unloading work is completed. When the cargo handling vehicle is running, the cargo handling platform stands by standing in a substantially vertical storage position, and the operating rod of the locking mechanism provided on the cargo handling platform is passed through the lock hole provided on the cargo handling platform and locked to the lifting column. Is held in the storage position.

  However, when a heavy load is applied to the load receiving table during loading and unloading of heavy loads, stress concentrates around the lock holes provided in the load receiving table, causing the load receiving table to be deformed or damaged. There is a problem of fear.

  The present invention has been made in view of such circumstances, and is a novel one that can relieve the above problem by reinforcing the periphery of the load receiving table, particularly its lock hole, using an existing hinge device provided in the load receiving table. It is another object of the present invention to provide a load receiving table and a load receiving table lifting / lowering device that moves the load receiving table up and down.

In order to achieve the above object, the invention according to claim 1 includes a load receiving base body having a load receiving surface on an upper surface, and hinges fixed to opposite left and right corner portions on the base end side of the load receiving base body. , About a hinge pin fitted in a hinge hole provided in the hinge device, and is rotatable between a substantially horizontal protruding position and a substantially vertical storage position,
The load receiving body is a load receiving base provided with a lock mechanism having an operation rod for locking the load receiving body to the storage position through a lock hole provided in the left and right side plates of the load receiving body. ,
The hinge device has a hinge frame that covers the lock hole, and a through hole concentric with the lock hole is formed in the hinge frame, and the operating rod is passed through the lock hole and the through hole. It is characterized by having made it.

  In order to achieve the above object, according to a second aspect of the present invention, in the first aspect of the present invention, the through hole formed in the hinge frame is formed to a size that supports the operating rod of the lock mechanism. It is characterized by being.

  In order to achieve the above object, a third aspect of the present invention is the load receiving base lifting device for lifting the load receiving base according to any one of the first and second aspects of the invention described in the second aspect. Thus, the vehicle is characterized by comprising a load receiving support portion that is provided on the vehicle and supports the load receiving platform so as to be able to move up and down, an elevating mechanism that elevates and lowers the load receiving table, and a drive device that drives the elevating mechanism.

  According to the first and second aspects of the present invention, the existing hinge tool fixed to the opposite left and right corners on the base end side of the load receiving body is a hinge frame that covers the lock hole provided in the load receiving body. Since it has, the said hinge tool can reinforce a load receiving stand main body, can compensate the strength fall of the load receiving stand by the said lock hole, and can suppress the deformation | transformation and damage of a load receiving stand. Further, by reinforcing the load receiving table, it is possible to provide the load receiving table at a low price without causing an increase in weight or an increase in the number of parts.

  According to the second aspect of the present invention, since the through hole formed in the hinge frame of the hinge tool is formed to have a size that supports the operating rod of the lock mechanism, the operating rod is supported by the hinge frame. Therefore, it is not necessary to separately provide a support member for supporting the operating rod, and the number of parts can be reduced.

  According to the third aspect of the present invention, since the load receiving platform can be easily manufactured by simplifying the structure and reducing the weight thereof, the load receiving table lifting mechanism for lifting and lowering the load receiving platform and the drive for driving the load receiving platform are provided. The apparatus can be easily manufactured and can be provided at low cost.

1 is a side view of a cargo handling vehicle equipped with a cargo receiving platform and a cargo receiving platform lifting apparatus according to the present invention (first embodiment). 1 is a perspective view of the load receiving platform and the load receiving platform lifting device as viewed in the direction of the arrow 2 in FIG. 1 (first embodiment). Sectional drawing which follows the 3-3 line of FIG. 2 (1st Embodiment). 4 is a perspective view of the phantom line encircled portion shown in FIG. 2 (first embodiment). Enlarged perspective view of the cargo cradle body (first embodiment) Exploded perspective view of the receiving platform (first embodiment) 1 is an enlarged back view of the cradle as viewed in the direction of arrow 7 in FIG. 1 (first embodiment). Sectional drawing which follows the 8-8 line of FIG. 7 (1st Embodiment). Sectional drawing which follows the 9-9 line of FIG. 7 (1st Embodiment). (A) is an enlarged view of the phantom line encircled portion in the direction of arrow 10 in FIG. 7, and (B) is a sectional view taken along line BB in (A) (first embodiment). (A) is a figure corresponding to FIG. 10 (A), (B) is sectional drawing which follows the BB line of (A) (2nd Embodiment). Side view of a cargo handling vehicle equipped with the present invention cargo cradle and cargo cradle lifting device (third embodiment) FIG. 13 is a perspective view taken along the arrow 13 in FIG. 12, (A) is a perspective view when the cargo cradle is stored, and (B) is a perspective view when the cargo cradle is deployed (third embodiment). Exploded perspective view of the locking mechanism (third embodiment) FIG. 13 is an enlarged sectional view taken along line 15-15 (third embodiment).

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

  This embodiment is a case where the cargo receiving platform and the cargo receiving platform lifting device of the present invention are implemented in a cargo handling vehicle.

  First, a first embodiment of the present invention will be described with reference to FIGS.

  1 to 4, a cargo box V that is open to the rear is mounted on a body frame F of the cargo handling vehicle. A vertical lift type load receiving platform lifting mechanism L is provided on the rear end surface of the cargo box V. Then, a load receiving table (tailgate) T, which is held at a substantially horizontal protruding position between the ground and the floor surface of the cargo box V by the mechanism L, is moved up and down and placed on the load receiving table T. The cargo can be loaded and unloaded between the ground and the packing box V.

  A pair of right and left lifting columns 2 and 2 extending in a substantially vertical direction are fixed to the left and right side edges of the rear end of the packing box V. Each lifting column 2 is formed of a hollow rectangular tube, and a top plate 2a is fixed to the upper end of the opening. Further, an intermediate plate 2b is integrally provided in the center in the lifting column 2 in the vertical direction. A vertical slit 4 for raising and lowering a slider 14 described later is opened on the rear wall of the lifting columns 2 and 2. A pair of guide rollers 5 are rotatably supported at the lower end of each lifting column 2 to guide the lifting operation of the inner column 3 to be described later. Top fixed sheaves 36 and 37 for guiding the wires 32 and 33 to be rotated are rotatably supported, and the stoppers 10 and 10 are in contact with the lower ends of the lifting columns 2 and 2 and the lower ends of the inner columns 3 and 3, respectively. Is fixed.

  A pair of left and right inner columns 3, 3 are respectively inserted into the pair of lifting columns 2, 2 so as to be movable up and down. Each inner column 3 is constituted by a hollow rectangular tube, and another vertical slit 7 is opened on the rear wall so as to coincide with the vertical slit 4 of the lifting column 2. As shown in FIG. 3, a pair of guide rollers 8, 8 are rotatably supported at the upper end of each inner column 3 via a bracket 9, and these guide rollers 8, 8 are connected to the inner columns 3, 3. During the raising / lowering operation, the inner walls of the raising / lowering columns 2, 2 roll to guide the raising / lowering of the inner columns 3, 3.

  As shown in FIG. 3, an elastic stopper 12 is provided at the lower end of each inner column 3 via a bracket 11, and this stopper 12 abuts against the stopper 10 at the lower end of the lifting column 2 to raise the inner column 3 to the highest position. To regulate.

  Sliders 14 are inserted into the pair of inner columns 3, 3 so as to be movable up and down, and the rear edges of the sliders 14, 14 are formed on the inner columns 3, 3 and the lifting columns 2, 2. The vertical slits 4, 4; 7, 7 pass through the rear slits and extend rearward thereof, and are guided by the vertical slits 4, 4; 7, 7 to the lifting columns 2, 2 and the inner columns 3, 3. It can move up and down. Upper and lower guide rollers 15 and 16 are rotatably supported on the upper and lower portions of the sliders 14 and 14, and the guide rollers 15 and 16 are lifted and lowered with respect to the inner columns 3 and 3. When rolling, the inner surfaces of the inner columns 3 and 3 are rolled. A stopper rubber 17 is provided on the upper edge of each slider 14, and the stopper rubber 17 engages with the base plate 3a to regulate the ascending position of the slider 14. Brackets 18 and 18 are respectively fixed to lower ends of the outer surfaces of the pair of sliders 14 and 14, and a load receiving table T is placed on the brackets 18 and 18 through hinges 80 and 80 described later in a substantially horizontal protruding position. The shafts 19 and 19 are supported so that they can rotate between substantially vertical storage positions. Further, the stay 21 fixed to the lower end of each slider 14 is engaged with the rear ends of hinge tools 80 and 80 fixed to the base end of the load receiving body 1 constituting the main part of the load receiving table T. Stopper bolts 22 and 22 for locking in the overhang position are attached so that the vertical position can be adjusted.

  A cross member 24 that extends in the horizontal direction is fixed to the intermediate portion in the vertical direction of the pair of lifting columns 2, 2 at a position substantially coincident with the floor surface of the packing box V.

  As shown in FIG. 4, the cross member 24 is formed of a hollow rectangular tube, and a cover body 24B is formed on the opening surface of a cross member main body 24A having a U-shaped cross section by a plurality of bolts and nuts 23. It is configured to be fixed integrally. A hydraulic cylinder CY as a drive device is provided inside the cross member 24. The hydraulic cylinder CY is disposed along the longitudinal direction in the cross member 24, and the base end of the cylinder barrel 26 is connected to a rib plate 25 welded to one end (left end) of the cross member 24. It is attached with pins 28 and bolts 29. The rib plate 25 extends in the vertical direction at the center in the width direction of one end (the left end in FIG. 4) in the cross member 24, and the upper and lower edges thereof are welded to the upper and lower inner surfaces of the cross member 24. Further, the tip of the cylinder rod 27 of the hydraulic cylinder CY extends partway through the cross member 24, and left and right movable sheaves 31l and 31r that can move in the vehicle width direction via the bracket 30 are rotatable in parallel. The bracket 30 is slidably supported on a guide rail 38 fixed in the cross member 24 along the longitudinal direction.

  As shown in FIG. 2, a pair of left and right side fixed sheaves 34 l and 34 r are rotatably attached in parallel to the left end of the cross member 24, and a right side fixed sheave 35 rotates at the right end of the cross member 24. Further, left and right top fixing sheaves 36 and 37 are rotatably attached to the upper parts of the left and right lifting columns 2 and 2, respectively.

  As shown in FIGS. 2 to 4, two left and right wires 32 and 33 are connected to the hydraulic cylinder CY. That is, one end of the left wire 32 is connected to the middle portion 32a of the cross member 24 and extends along the cross member 24. The left movable sheave 31l, the left side fixed sheave 34l, and the left fixed top The sheave 36 is wound around sequentially, and the other end is bound to the left slider 14. Similarly, one end of the right wire 33 is attached to an intermediate portion 33a of the cross member 24 and extends along the cross member 24. The right movable sheave 31r, the right side fixed sheaves 34r and 35, and the right The fixed top sheave 37 is wound around sequentially, and the other end is bound to the right slider 14.

  Therefore, when the hydraulic cylinder CY is extended and contracted, the pair of left and right sliders 14 and 14 are moved up and down synchronously via the two systems of wires 32 and 33, and the load receiving table T connected thereto is moved up and down. Can do.

  Next, the structure of the load receiving stand (tailgate) T according to the present invention supported by the pair of sliders 14 and 14 will be described with reference to FIGS.

  In the following description, “front and rear” and “left and right” are used for a cargo handling vehicle.

  The main body 1 constituting the main body of the receiving base T is formed of a steel plate and integrally formed with a front plate 40 and a back plate 50, and is formed in a rectangular shape. The front side portion 1f is supported so as to be movable up and down by lifting columns 2 and 2 as load receiving support portions of the cargo handling vehicle, and is fixed to the opposite left and right corner portions 1c and 1c of the front side portion 1f, respectively. , 80 (detailed later) are pivotally supported by brackets 18, 18 fixed to sliders 14, 14 so that they can rotate between a substantially horizontal protruding position and a substantially vertical storage position. The

  The surface of the front plate 40 of the load receiving body 1 is formed on a load receiving surface 1a having a striped rough surface, and the back surface is formed on a substantially smooth flat surface.

  As shown in FIGS. 5, 6, and 8, the front side portion 1 f (the attachment side to the sliders 14, 14) of the front plate 40 has a front first extending portion 41, and the rear side portion has a rear portion. The first extending portions 42 on the side are formed integrally. The first extension 41 on the front side is bent at a substantially right angle downward with respect to the substantially flat load receiving surface 1a, and the second extension 42 on the rear side is rearward with respect to the load receiving surface 1a. It is formed on an inclined surface that is inclined downward, and is used as an inclined surface for loading luggage.

The back plate 50 is formed in the same size as the front plate 40. The back plate 50 is provided with two left and right vertical stiffeners Sl ₁ and Sl ₂ and three upper and lower horizontal stiffeners Sw ₁ , Sw ₂ and Sw ₃ (see FIG. 1). A pair of support parts 54 and 54 are press-molded. Specifically, as shown in FIGS. 6, 7, and 8, the trapezoidal support portions 54 and 54 that form a pair in the front half portion and the rear half portion of the intermediate region of the back plate 50 from the back surface toward the front surface. Is swelled integrally. The pair of support portions 54, 54 extend in the left-right direction substantially parallel to each other with a space in the front-rear direction of the back plate 50, and the upper surfaces of these support portions 54, 54 are formed flat, The side surfaces are formed as inclined surfaces having an upward slope from the lower end toward the upper end, and the corner portions of the side surfaces of the pair of support portions 54 and 54 are formed as smooth curved surfaces 54b. . As shown most clearly in FIG. 7, the plurality of stiffener groups are integrally formed in the load receiving table main body 1 so as to surround the support portions 54, 54 by press molding of the pair of support portions 54, 54. Can be molded. That is, on the left and right sides of the back plate 50, two left and right vertical stiffeners Sl ₁ and Sl ₂ extending in the front-rear direction are provided between the pair of support portions 54 and 54, the front sides of the support portions 54 and 54, and On the rear side, three upper and lower horizontal stiffeners Sw ₁ , Sw ₂ , Sw ₃ extending substantially parallel to the left-right direction are formed, respectively.

  As shown in FIGS. 5, 6, and 8, the front side portion and the rear side portion of the back plate 50 respectively correspond to the first extension portion 41 on the front side and the first extension portion 42 on the rear side of the front plate 40. Thus, the front side second extending portion 51 and the rear side second extending portion 52 are integrally formed. The front-side second extending portion 51 is bent downward at substantially a right angle, and the rear-side second extending portion 52 is formed on an inclined surface that is inclined downward toward the rear. In addition, left and right side plates 57 and 58 having an L-shaped cross section are formed on both left and right sides of the back plate 50 so as to stand inward.

  As shown in FIG. 6, a plurality of strip rubber cushions 60 serving as cushion bodies are spaced on the upper surfaces of the pair of support portions 54, 54 in the longitudinal direction of the support portions 54, 54. Each of the cushion rubbers 60 is sandwiched between the front plate 40 and the back plate 50 in a compressed state.

  The front plate 40 is superposed on the back plate 50, and the four sides thereof are fastened together by a plurality of bolts 70 and caulking nuts 71. That is, a plurality of bolts 70 through a plurality of bolt holes formed in the first extending portion 41 on the front side of the front plate 40 and the second extending portion 51 on the front side of the back plate 50 that are in contact with each other. The caulking nut 71 is integrally connected (see FIG. 8). Similarly, the first extending portion 42 on the rear side of the front plate 40 and the second extending portion 52 on the rear side of the back plate 50 are in contact with each other through a plurality of bolt holes formed in them. The bolt 70 and the caulking nut 71 are integrally connected (see FIG. 8). Further, the left and right side plates 57 and 58 and the left and right side portions of the front plate 40 are integrally connected by a plurality of bolts 70 and caulking nuts 71 through a plurality of bolt holes formed in them. A gap formed between the left and right side portions of the front plate 40 and the back plate 50 is closed by the left and right side plates 57 and 58. Accordingly, the front plate 40 is integrally overlapped on the back plate 50, and the plurality of cushion rubbers 60 on the pair of support portions 54, 54 are sandwiched between the back plate 50 and the front plate 40 in a compressed state. And can absorb vibrations acting on them.

  As shown in FIGS. 5, 6, and 7, hinges 80 are provided at the base end side of the load receiving table body 1 in which the front plate 40 and the back plate 50 are integrally coupled, that is, at the left and right corner portions 1 c and 1 c of the front side portion 1 f. , 80 are connected together.

  Each hinge tool 80 is configured by reinforcing a hinge frame 81 that is formed in an L shape by a side surface portion 81s and a front surface portion 81f that surround each corner portion 1c of the cargo receiving body 1 with a triangular reinforcing plate 82. The plurality of bolts 70 and nuts 84 and 85 are integrally connected to the left and right corner portions 1c and 1c on the base end side of the load receiving body 1 from the outside. Each hinge bracket 80 is extended rearward so as to reach the majority of the load receiving body 1 in the front-rear direction so as to reinforce both outer side surfaces of the load receiving body 1, and the front end thereof has a lock mechanism 100 described later. The left and right operation rods 106 and 107 are extended rearward.

  A plurality of nuts 84 and 85 are fixed to the inner surfaces of the left and right end portions of the front-side second extension portion 51 and the inner surfaces of the front portions of the left and right side plates 57 and 58, respectively. The bolts 70 are respectively fastened to the nuts 84 and 85 through bolt holes drilled in the side surface portions 81s and the front surface portion 81f of the hinge frames 81 and 81, so that the left and right corner portions 1c and 1c on the front side of the load receiving base body 1 are fastened. The left and right hinges 80, 80 that make a pair are fixed.

  The front surface portion 81f of the hinge frame 81 of each hinge device 80 is fastened with bolts 70 and nuts 84 to the left and right end portions of the front first extending portion 41 and the front second extending portion 51. Is done.

  As shown in FIGS. 6 and 7, the reinforcing portions 82 and 82 of the left and right hinges 80 and 80 extend in directions facing each other and support the back plate 50 of the load receiving body 1, and the support span l is By shortening, the bending of the load receiving body 1 when the load is supported can be reduced.

  The load receiving table main body 1 is pivotally supported on the brackets 18 and 18 of the sliders 14 and 14 via left and right hinges 80 and 80 so as to be rotatable.

  As shown in FIGS. 5 to 7, the hinge holes 87 and 87 provided in the side surface portions 81 s and 81 s of the hinge frames 81 and 81 of the left and right hinge tools 80 and 80 are provided in the brackets 18 and 18 of the sliders 14 and 14, respectively. The fixed hinge pins 88, 88 are fitted so as to be freely rotatable, and the load receiving body 1 can be pivoted up and down around the hinge pins 88, 88. On one side (FIG. 6, right side) of the hollow square tube portion formed on the hinge pin 88, one end (FIG. 6, right end) of the torsion bar 89 extending in the left-right direction of the load receiving base body 1 is provided with a hinge hole 87. The one end of the torsion bar 89 is fixed to one bracket 18. Further, the square shaft portion 89 s at the other end (the left end in FIG. 6) of the torsion bar 89 is fitted into the hollow square tube portion of the support shaft 90 fixed to the front side of the load receiving body 1. Therefore, if the load receiving body 1 is rotated about the pivots 19 and 19 from the extended position to the retracted position, the torsion bar 89 is twisted and the torsional force is increased. As a result, the deployment of the load receiving body 1 from the retracted position to the extended position can be assisted by the return of the torsional force of the torsion bar 89, and the operation of unfolding the load receiving body 1 is light and easy. .

  As shown in FIGS. 3, 5, and 6, end portions of the side surfaces 81 s and 81 s of the hinge frames 81 and 81 of the hinge tools 80 and 80 away from the reinforcing portions 82 and 82 (the load receiving table T is in the extended position). The front end portion at a certain time is extended, and the extended portion abuts against the stopper bolt 22 to hold the load receiving body 1 in a horizontal position.

  As shown in FIGS. 6 and 7, buffer pads 61 are respectively fixed to the back surfaces of the four corners of the back plate 50 of the load receiving body 1, and these buffer pads 61 are lowered from the load receiving body 1. When you do this, you will sit on the ground in a buffer.

The load receiving body 1 is provided with a lock mechanism 100 for locking the load receiving body 1 in the storage position when it stands in the storage position. As shown in FIG. 8, the central lateral stiffener Sw ₃ is formed with a shorter height (dimension in the front-rear direction) than the upper and lower lateral stiffeners Sw ₁ and Sw ₂ . The locking mechanism 100 is provided in the central lateral stiffener Sw ₃ between the pair of support portions 54, 54. A gate lock plate 101 is fixed to the left end of the central lateral stiffener Sw ₃ , and an operation lever 102 is pivotally supported on the gate lock plate 101. On the inner side of the back plate 50, left and right operation rods 106 and 107 are connected to elongated holes 105 and 105 of a pair of links 104 and 104 pivotally supported on both sides of a rotating plate 103 that rotates together with the operation lever 102. The left and right actuating rods 106 and 107 are extended in the left and right direction of the load receiving body 1.

  As clearly shown in FIG. 10, lock holes 57h and 58h are formed in the left and right side plates 57 and 58 of the load receiving body 1 and the side portions 81s of the hinge frames 81 and 81 of the left and right hinges 80 and 80, respectively. 81s are provided with through holes 81h, 81h concentric with the lock holes 57h, 58h, and these through holes 81h, 81h are slidable at the end portions of the left and right operating rods 106, 107. It is formed to the dimension to support. The distal ends of the right and left operation rods 106 and 107 of the lock mechanism 100 are slidably inserted and supported in the through holes 81h and 81h, and the left and right operation rods 106 and 107 slide to the lock position (solid line position in FIG. 10). When moved, their tip portions can be removably fitted into locking holes 108h, 108h formed in the lock portions 108, 108 provided on the lifting columns 2, 2.

  Thus, the regions of the left and right side plates 57, 58 of the load receiving body 1 where the lock holes 57h, 58h are drilled are tightly covered by the side portions 81s, 81s of the hinge frames 81, 81 of the hinge tools 80, 80. The load receiving body 1 is compensated for the strength reduction caused by the locking holes 57h and 58h formed in the left and right side plates 57 and 58.

  As shown in FIGS. 7 to 10, after the load receiving platform T is stood and stored between the lifting columns 1 and 2, if the operation lever 102 is rotated to the lock position (solid line position in FIG. 7), the left and right operation rods 106, 107 slides outward through the rotating plate 103 and the links 104, 104, and the tip portions thereof are fitted into the locking holes 108h, 108h of the lock portions 108, 108, respectively. Can be locked in the storage position. Further, when the operation lever 102 is rotated to the unlock position (the arrow direction in FIG. 7), the lock is released.

  Note that the lock mechanism 100 is a conventionally known one and will not be described in detail.

  As described above, even if the left and right side plates 57 and 58 of the load receiving table T are provided with the lock holes 57h and 58h for locking the load receiving table T in the storage position, the lock holes 57h and 58h are included. Since the left and right side plates 57 and 58 of the load receiving table T are covered with the side surfaces 81s and 81s of the hinge frames 81 and 81 of the hinge tools 80 and 80 and are reinforced as a two-layer structure, an excessive load is applied to the load receiving table T. Even if is applied, stress is not concentrated in the lock holes 57h and 58h, and deformation and breakage of the load receiving tray T can be suppressed.

  Next, a second embodiment of the present invention will be described with reference to FIG.

  In the second embodiment, the same reference numerals are given to the same components as those in the first embodiment.

  The second embodiment is different from the first embodiment in the support structure of the lock mechanism 100 provided in the cargo receiver body 1, and the side surface portion 81 s of the hinge frame 81 of the hinge tool 80 is operated by the lock mechanism 100. A through hole 281h concentric with the lock holes 57h and 58h, through which the rods 106 and 107 are inserted with play, is formed, and an inner surface of the side surface portion 81s surrounds the through hole 281h and a rod support member. 260 is fixed by a plurality of bolts and nuts 261. The rod support member 260 has a sleeve 260s, and the tip of the operating rod 106 (107) of the lock mechanism 100 is slidably supported by the sleeve 260s.

  Thus, also in the second embodiment, the periphery of the lock holes 57h, 58h of the left and right side plates 57, 58 of the load receiving table T is covered by the hinge frames 81, 81 of the hinge tools 80, 80, and the side plates 57, 58 can be reinforced.

  Next, a third embodiment of the present invention will be described with reference to FIGS.

  In the third embodiment, the same reference numerals are given to the same components as those in the first embodiment.

  This third embodiment differs from the first and second embodiments in the structure of the lock mechanism for locking the load receiving table T in the storage position. In this third embodiment, the left and right side plates 57 of the load receiving table T are different. , 58 are provided to lock the load receiving platform T separately to the left and right lifting columns 2, 2, respectively.

  Hereinafter, the structure of one (left side) lock mechanism 300 will be described.

  A bent operating rod 307 of an L-shaped operation handle 302 is supported on the left side plate 57 of the load receiving body 1 so as to be rotatable and movable in the left-right direction. The operation rod 307 of the operation handle 302 receives the load through the U-shaped handle locking member 303 fixed to the outer surface of the side plate 57, the through hole 81 h of the hinge frame 81, and the lock hole 57 h of the side plate 57 of the load receiving body 1. A compression coil spring 306 is interposed via a sleeve 304 between a double nut 305 and a side plate 57 that extend inwardly of the base body 1 and are screwed to the front end thereof. The compression coil spring 306 urges the operation handle 302 to move inward of the load receiving body 1, and the operation handle 302 is normally held at a position close to the hinge frame 81.

  After the load receiving platform T is turned upright from the extended position (FIG. 13B) to the retracted position (FIG. 13A), the operation handle 302 is pulled out against the urging force of the compression coil spring 306. When the operation handle 302 held on the outer surface of the U-shaped handle locking member 303 is engaged with the hook portion of the lock bracket 308 fixed to the lifting column 2, the cargo handling table T is , Fixed in the storage position.

  Therefore, also in the third embodiment, the periphery of the lock holes 57h and 58h of the left and right side plates 57 and 58 of the load receiving table T is covered by the hinge frames 81 and 81 of the hinge tools 80 and 80, and the side plate 57 of the load receiving table T is covered. , 58 can be reinforced.

  Although the first to third embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various embodiments are possible within the scope of the present invention.

  For example, in the above-described embodiment, the load receiving table according to the present invention is configured by connecting a front plate and a back plate superimposed on the front plate, and this load receiving table is configured by welding a plurality of steel plates. (For example, registered utility model No. 3169953). In the above embodiment, the hinge device is composed of a hinge frame formed from the side surface portion and the front surface portion and the triangular reinforcing portion, but at least the side surface portion that covers the lock hole of the load receiving body is provided. The front part and the reinforcing part may be omitted.

  Furthermore, in the above-described embodiment, the case has been described in which the load receiving platform is implemented in a vertical lifting type load receiving platform lifting / lowering device that can be vertically lifted along a lifting column provided in a cargo handling vehicle. The present invention may be implemented in a load receiving table lifting device provided with the device or a floor receiving type lifting device that can store the load receiving table under the floor of the cargo handling vehicle. Furthermore, the present invention can be applied to a load receiving platform of a transfer device other than a cargo handling vehicle.

1 Load receiving body 1a Load receiving surface 1c Corner 2 Load receiving support (lifting column)
57 Left side plate 57h Lock hole 58 Right side plate 58h Lock hole 80 Hinge tool 81 Hinge frame 81h Through hole 87 Hinge hole 88 Hinge pin 100 Locking mechanism 106 Acting rod 107 Acting rod 281h Through hole 300 Locking mechanism 307 Actuating rod CY Driving device L Lifting mechanism

Claims (3)

A load receiving body (1) having a load receiving surface (1a) on the upper surface, and hinges (80, 80) fixed to opposite left and right corner portions (1c, 1c) on the base end side of the load receiving body (1). ) Around the hinge pins (88, 88) fitted in the hinge holes (87, 87) provided in the hinge tool (80, 80), and a substantially vertical retracted position, It is possible to rotate between
The load receiving body (1) passes through the lock holes (57h, 58h) provided in the left and right side plates (57, 58) of the load receiving body (1), and the load receiving body (1) is placed in the storage position. A receiving platform provided with a lock mechanism (100; 300) having an operating rod (106, 107; 307, 307) for locking to
The hinge device (80, 80) has a hinge frame (81, 81) that covers the lock hole (57h, 58h), and the hinge frame (81, 81) includes the lock hole (57h, 58h). Concentric through holes (81h, 81h; 281h, 281h) are formed, and the operating rods (106, 107; 307) are connected to the lock holes (57h, 58h) and through holes (81h, 81h; 281h, 281h). A cradle, characterized in that it is pierced through.   The through holes (81h, 81h) drilled in the hinge frame (81, 81) are dimensioned to support the operating rods (106, 107) of the lock mechanism (100). The load receiving stand according to claim 1.   A load receiving table lifting / lowering device for moving up and down the load receiving table according to any one of claims 1 and 2, wherein the load receiving table supporting portion (2) is provided in a vehicle and supports the load receiving table so that the load receiving table can be moved up and down. A load receiving / lifting device comprising: a lifting / lowering mechanism (L) that lifts / lowers the load receiving platform and a driving device (CY) that drives the lifting / lowering mechanism (L).

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