JP4139370B2 - Vehicle loading platform - Google Patents

Description

  The present invention relates to an improvement of a loading platform for placing and lifting a load when loading and unloading a load on a truck or the like, and more particularly to a foldable loading platform.

  In general, in the underfloor retractable loading platform, a first panel on the front end side is connected to a second panel adjacent thereto so as to be foldable and unfoldable via a hinge. The first panel of such a foldable loading platform is secured to the second panel by a locking device so as not to move in the folded state. When loading / unloading the cargo, the loading platform is placed between the floor surface height position of the loading platform and the ground in a state where the first panel is unfolded by the locking device and the first panel is unrolled. On the other hand, during storage, the loading platform is configured to be stored below the floor of the loading platform in a state where the first panel is folded and secured to the second panel by the locking device (for example, , See Patent Document 1).

In Patent Document 1, a sliding plate having a hook and a handle made of a strip-shaped flexible material is slidably moved to the side edge of the first panel and is always retracted inward by a spring. At the same time, a U-shaped receiving member with which the hook is engaged is provided at the side edge of the second panel to constitute a locking device. When the first panel is folded, the hook is automatically engaged with the receiving member by the biasing force of the spring by passing the hook while the tapered surface of the lower surface of the hook is in contact with the receiving member. The second panel is secured. On the other hand, when the first panel is deployed, if the handle is lifted upward, the sliding plate slides outward against the urging force of the spring, so that the hook is detached from the receiving member, and the first panel The securing to the second panel is released and the first panel can be deployed.
JP 2003-226188 A (page 3, FIG. 2, 5, 9-12)

  However, in the above-mentioned patent document 1, the handle for releasing the lashing of the first panel with respect to the second panel protrudes greatly outward from the side edge of the first panel. When carrying out loading / unloading work in a state, there is a risk that an operator may get caught in the foot, which is very dangerous.

  The present invention has been made in view of the above points, and an object of the present invention is to ensure the safety of the worker so that the locking device does not interfere with the worker.

  In order to achieve the above object, the present invention is characterized in that an operator does not interfere with the lock device during work.

  Specifically, according to the present invention, the first panel on the front end side is connected to the adjacent second panel via a hinge so as to be foldable and unfoldable, and the first panel is folded with respect to the second panel. When the cargo is loaded and unloaded, when the first panel is unrolled by the locking device and the first panel is unfolded, the floor height position of the loading platform and the ground The vehicle loading platform is configured to be stored below the floor of the cargo bed in a state where the first panel is folded and secured to the second panel by the locking device while being stored. The following solution was taken.

That is, according to the first aspect of the present invention, the lock device includes a first engagement tool provided on the first panel and a first engagement tool provided on the second panel so that the first engagement tool can be engaged and disengaged. The first engaging tool is formed in a substantially U-shape projecting from the first panel so as to be elongated in the front-rear direction of the loading platform in plan view. On the other hand, the second engagement tool has a hook portion that engages with the catch at the upper end, an engagement step portion in the middle, and the middle is pivotally supported in the vertical direction. And a hook that is pivotally disposed on the hook, and an engaging convex part that engages with the engaging step part of the hook in the middle, and on the side end surface of the second panel on the opposite side of the engaging convex part. It has a lever part projecting so as to face, and the upper end is pivotally supported and is arranged to be rotatable in the vertical direction And create the lever, and a coil spring for connecting the operation lever lower end and the hook bottom, the first engaging member and second engaging member are both the side end edge of the first panel and the second panel It is provided so as not to protrude outward from the side edge, and when the first panel is folded, the hook presses the hook to rotate it, so that the hook portion of the hook engages with the catch. The engaging projection of the operating lever engages with the engaging step of the hook, and the first panel is secured to the second panel. On the other hand, when the first panel is deployed, the lever of the operating lever The hook is rotated by the spring force of the coil spring at the same time that the engaging projection is removed from the engaging step portion by lifting the part upward and rotating the operating lever against the spring force of the coil spring. Let the above Ji was removed from the hook portion of the hook, characterized in that it is configured to release the lashing to the second panel of the first panel.

  According to a second aspect of the present invention, in the first aspect of the present invention, the first engagement tool protrudes from the upper surface of the first panel, and the second engagement tool is housed inside the second panel so that the upper surface of the second panel. The first engagement tool is configured to engage with the second engagement tool inside the second panel in a state in which the first panel is folded without projecting from the first panel.

  According to the first aspect of the present invention, both the first engagement tool and the second engagement tool constituting the locking device do not protrude outward from the side edge portions of the first panel and the second panel. When carrying out the loading and unloading work with the first panel deployed, the first engaging tool and the second engaging tool do not interfere with the operator, and the operator is not likely to catch his / her feet. You can work safely.

  According to the second aspect of the invention, since the second engagement tool is housed in the second panel, for example, when the load is unloaded from the middle of the loading platform (second panel) to the side, It is possible to avoid a situation in which the second engagement tool gets in the way, and the unloading work can be performed smoothly.

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

  FIG. 8 shows a van A as a vehicle. A chassis frame (not shown) extending in the vehicle longitudinal direction on both sides in the vehicle width direction of the van A is provided with two doors b1 having double doors at the rear end. A box-shaped cargo bed B is mounted, and a cargo handling device C is provided below the floor surface of the cargo bed B. This loading / unloading apparatus C includes a loading platform 1 according to an embodiment of the present invention, and two sets of parallel link mechanisms 2 that cantileverly support both ends of the loading platform 1 at the base end in the vehicle width direction, By synchronously operating these two sets of parallel link mechanisms 2, when loading / unloading a load onto / from van vehicle A, the loading platform 1 is placed on the loading platform 1 in the state where the loading platform 1 is loaded. B is raised and lowered in a horizontal posture with respect to the floor height position of B.

  As shown in FIGS. 1 to 3, the loading platform 1 is a three-fold type under floor storage type, and includes a first panel (top panel) 3 on the front end side and a second panel (middle panel) adjacent thereto. 4 and a third panel (bottom panel) 5 on the base end side. The first panel 3 is connected to the second panel 4 via two left and right hinges 6 so as to be foldable and unfoldable. 4 is connected to the third panel 5 via two left and right hinges 7 so as to be foldable and unfoldable. Two reinforcing frames 8a, 8b, and 8c are provided on the lower surfaces of the first panel 3, the second panel 4, and the third panel 5 at the same intervals as the two sets of parallel link mechanisms 2, and these reinforcing frames 8a. , 8b, and 8c are in contact with each other in a state where the three first panels 3, the second panel 4, and the third panel 5 are deployed in a row, and form one reinforcing frame (see FIG. 2). The three first panels 3, the second panel 4, and the third panel 5 are folded together so as to be folded together (see FIG. 3). In FIG. 8, 9 is a pair of guide rollers, and these guide rollers 9 guide the loading platform 1 when the loading platform 1 is drawn below the floor surface of the loading platform B or pulled out from below the floor surface.

  The first panel 3 of the loading platform 1 is secured to the second panel 4 by a lock device 10 in a folded state. Then, when loading / unloading the load, the loading platform 1 releases the binding of the first panel 3 to the second panel 4 by the locking device 10 and unfolds the first panel 3 so that the floor surface height of the loading platform B is expanded. While being moved up and down between the vertical position and the ground, when storing, the first panel 3 is folded and stored below the floor surface of the loading platform B with the second panel 4 secured by the locking device 10. It is configured as follows.

  The lock device 10 includes a first engagement tool 11 provided on the first panel 3 and a second engagement provided on the second panel 4 so that the first engagement tool 11 is detachably engaged. The first engaging tool 11 and the second engaging tool 12 are both provided on the side edge of the first panel 3 and the second panel 4 (left side when viewed from the rear of the vehicle body). It is provided so as not to protrude outward from the edge. This is the greatest feature of the present invention.

  As shown in detail in FIG. 4, the first engaging tool 11 is composed of a triangular base plate 13 and a substantially U-shaped catch 14 integrally projecting on the base plate 13. Ellipse bolt insertion holes 13a are formed through the three corner portions 13 respectively. Then, in a state where the catch 14 is elongated in the front-rear direction of the loading platform 1 in plan view, the bolts 15 are inserted into the respective bolt insertion holes 13a of the base plate 13, and the first engagement tool 11 is moved to the first. The panel 3 is fixed in the middle of the side edge portion.

  On the other hand, the second engagement tool 12 includes a pair of L-shaped support plates 16 erected in parallel, as shown in enlarged detail in FIGS. 5 to 7, and the pair of L-shaped support plates. 16 includes a base portion 17 and a vertical wall portion 18 extending vertically from the base portion 17. Each of the base portions 17 has two elliptical bolt insertion holes 17 a formed therethrough. An insertion recess 18a into which the catch 14 of the first engagement tool 11 is inserted is formed in the upper end of the vertical wall portion 18 by notching. Between the vertical wall portions 18 of the pair of support plates 16, a hook 19 is pivotally supported by a support shaft 20 in the middle so as to be rotatable in the vertical direction. Next to the hook 19, an operation lever 21 is pivotally supported by an upper end supported by a support shaft 22, and the lower end of the hook 19 and the lower end of the operation lever 21 are connected by a coil spring 23. Yes. A notch 24 cut out in a substantially U shape is formed on the upper end side of the hook 19, and the upper side of the notch 24 has a hook portion 25 that engages with the catch 14 of the first engagement tool 11. (See FIGS. 7C and 7D). An engagement step portion 26 is formed in the middle of the hook 19. On the other hand, an engagement convex portion 27 that engages with the engagement step portion 26 of the hook 19 is formed in the middle of the operation lever 21 (see FIG. 7C), and on the opposite side is a lever. The part 28 protrudes integrally. Then, in a state where the second engagement tool 12 is housed in the vicinity of the first panel 3 from the middle of the side edge of the second panel 4 so as not to protrude from the upper surface of the second panel 4, Bolts (not shown) are inserted into the respective bolt insertion holes 17a to fix the second engagement tool 12 to the second panel 4, and the lever portion 28 faces the side end surface of the second panel 4 (FIG. 1). To 3). Accordingly, the first engagement tool 11 is engaged with the second engagement tool 12 inside the second panel 4 in a state where the first panel 3 is folded.

  In order to fold the loading platform 1 configured in this way from the unfolded state, the operator holds the first panel 3 by hand and turns it upward in the counterclockwise direction in FIG. It is moved to approach the upper surface of the second panel 4. Thereby, the catch 14 of the 1st engagement tool 11 approaches the 2nd engagement tool 12 (refer Fig.7 (a)). In this state, the hook 19 of the second engagement tool 12 is pulled by the spring force of the coil spring 23 so that the opening of the notch 24 is directed obliquely upward. Next, the catch 14 of the first engagement tool 11 is inserted into the insertion recess 18a of the support plate 16 of the second engagement tool 12 and comes into contact with the lower side of the notch 24 of the hook 19, and the lower side of the notch 24 is lowered downward. Press (see FIG. 7B). As a result, the hook 19 rotates clockwise around the support shaft 20 in FIG. 7 so that the catch 14 enters the notch 24 and the hook 25 is engaged with the catch 14. At the same time, the operating lever 21 is rotated clockwise around the support shaft 22 by the spring force of the coil spring 23 so that the engaging convex portion 27 is engaged with the engaging step portion 26, and the first panel 3 is in the second state. The panel 4 is secured (see FIG. 7C). The folded first panel 3 and second panel 4 are further rotated upward toward the front of the vehicle body with hinge 7 as a fulcrum, and folded on the upper surface of third panel 5 (see FIG. 3). Store under the floor of the loading platform B in a folded state.

  On the other hand, in order to unfold the loading platform 1 folded in a three-folded state, the first panel 3 and the second panel 4 are pivoted clockwise in FIG. It is made to expand | deploy and it is made to protrude horizontally from the 3rd panel 5 to a vehicle body back. From this state, the operator lifts the lever portion 28 of the operation lever 21 of the second engagement tool 12 upward by hand, and moves the operation lever 21 around the support shaft 22 against the spring force of the coil spring 23 in FIG. When rotated counterclockwise, the engaging convex part 27 is disengaged from the engaging step part 26 (see FIG. 7D). Then, the hook 19 is rotated counterclockwise in FIG. 7 around the support shaft 20 by the spring force of the coil spring 23, and the catch 14 of the first engagement tool 11 is pushed upward at the lower side of the notch 24 to hook the hook 19. The first panel 3 is released from the portion 25, and the securing of the second panel 4 to the second panel 4 is released (see FIG. 7E). Thereafter, the first panel 3 may be unfolded by turning upward toward the rear of the vehicle body with the hinge 6 as a fulcrum.

  As described above, in this embodiment, the locking device 10 is configured by the first engagement tool 11 provided on the first panel 3 and the second engagement tool 12 provided on the second panel 4, and Since both the first engagement tool 11 and the second engagement tool 12 are provided on the side edge portions of the first panel 3 and the second panel 4 so as not to protrude outward from the side edge portions, When carrying out the loading and unloading work with the panel 3 in the unfolded state, the first engaging tool 11 and the second engaging tool 12 do not interfere with the operator, and there is no possibility that the operator will catch their feet. Work safely.

  In this embodiment, since the second engagement tool 12 is housed in the second panel 4 so as not to protrude from the upper surface of the second panel 4, for example, a load is placed in the middle of the loading platform 1 (second When unloading from the panel 4) to the side, the unloading operation can be performed smoothly without hooking the load on the second engagement tool 12.

  In this embodiment, the cargo handling apparatus A is applied to the rear end portion of the vehicle, but may be applied to the left end portion or the right end portion.

  The present invention is useful as a foldable loading platform that loads and unloads a load when loading and unloading the load on a vehicle.

It is a top view of the state which unfolded the loading platform. It is a side view of the state which unfolded the loading platform. It is a side view of the state which folded the loading platform in 3 sheets. The 1st engagement tool is shown, (a) is a top view and (b) is a front view. The 2nd engaging tool is shown, (a) is a front view, (b) is a side view, (c) is a bottom view. It is a perspective view of the 2nd engagement tool. It is operation | movement explanatory drawing of a locking device, (a) is a state just before a 1st engaging tool engages with a 2nd engaging tool, (b) is a 1st engaging tool engaging with a 2nd engaging tool. (C) is a state where the first engagement tool has finished engaging with the second engagement tool, and (d) is a state where the lever portion of the operation lever is lifted to release the engagement between the hook and the operation lever. (E) shows a state where the first engagement tool is detached from the second engagement tool. It is a back perspective view in which a loading platform is in use in a truck provided with a loading platform for vehicles.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Loading platform 3 1st panel 4 2nd panel 6 Hinge 10 Locking device 11 1st engaging tool 12 2nd engaging tool B Loading platform

Claims (2)

The first panel (3) on the front end side is connected to the adjacent second panel (4) via a hinge (6) so as to be foldable and unfoldable, and the first panel (3) is folded in the second state. The panel (4) is secured by the locking device (10) , and when loading or unloading the luggage, the locking device (10) releases the securing of the first panel (3) to the second panel (4) . While the first panel (3) is unfolded, it is moved up and down between the floor height position of the loading platform (B) and the ground, while the first panel (3) is folded to store the second panel (4) during storage. A vehicle loading platform configured to be stored below the floor of the loading platform (B) in a state of being secured by the locking device (10) ,
Said locking device (10), the first and engaging member (11) provided in the first panel (3), provided on said second panel (4) the first engaging member (11) is engaged A second engagement tool (12) that is removably engaged;
The first engagement tool (11) is a substantially U-shaped catch (projected and arranged on the first panel (3)) so as to extend in the front-rear direction of the loading platform (1) in plan view. 14)
On the other hand, the second engagement tool (12) has a hook portion (25) engaged with the catch (14) at the upper end, an engagement step portion (26) in the middle, and a middle portion. A hook (19) that is pivotally supported and arranged to be rotatable in the vertical direction;
It has an engagement convex part (27) engaged with the engagement step part (26) of the hook (19) in the middle, and the second panel (4) on the opposite side of the engagement convex part (27). An operating lever (21) having a lever portion (28) projecting so as to face the side end surface of the first end, and having an upper end pivotally supported so as to be rotatable in the vertical direction;
A coil spring (23) for connecting the lower end of the hook (19) and the lower end of the operating lever (21);
Both the first engagement tool (11) and the second engagement tool (12) protrude outward from the side edge of the first panel (3) and the second panel (4). Not to be provided ,
When the first panel (3) is folded, the catch (14) presses and rotates the hook (19), so that the hook portion (25) of the hook (19) is engaged with the catch (14). At the same time, the engaging projection (27) of the operating lever (21) is engaged with the engaging step (26) of the hook (19), so that the first panel (3) is in contact with the second panel (4). Tied up and
On the other hand, when unfolding the first panel (3), the lever portion (28) of the operating lever (21) is lifted upward so that the operating lever (21) resists the spring force of the coil spring (23). By rotating, the engagement protrusion (27) is removed from the engagement step (26), and at the same time, the hook (19) is rotated by the spring force of the coil spring (23), and the catch (14). The vehicle loading platform is configured to release the hook from the hook portion (25) of the hook (19) and release the binding of the first panel (3) to the second panel (4) . The vehicle loading platform according to claim 1,
The first engagement tool protrudes from the upper surface of the first panel,
The second engagement tool is housed inside the second panel and does not protrude from the upper surface of the second panel.
The vehicle loading platform, wherein the first engaging member is configured to engage with the second engaging member inside the second panel in a state where the first panel is folded.

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