JP3319897B2 - Tailgate lift device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tailgate lift device installed at a rear end portion of a cargo handling vehicle and capable of lifting and lowering luggage, and more particularly to a structure for preventing vibration after the tailgate is stored. About.

[0002]

2. Description of the Related Art In a tailgate lift device installed at the rear end of a cargo bed of a vehicle, a pair of guide rails is fixed to each of a pair of columns installed at the rear end of the vehicle. A pair of sliders having guide rollers capable of rolling can be moved up and down along the guide rail, and the tailgate is rotated between the pair of sliders via a pivot shaft between a load receiving state and a stored state. It is movably supported.

[0003] In this tailgate lift device, the tailgate is placed in a cargo receiving state, and a load is placed on the tailgate, a slider is lifted, and the load is lifted. When the tailgate is in the housed state, the tip of the tailgate lift is locked to a column or a guide rail by a locking mechanism (a locking hook and a locking claw).

[0004]

However, in the above-described conventional tailgate lift device, there is a gap between the guide roller of the slider and the guide rail when the tailgate is stored, for smoothly operating the guide roller. Therefore, the slider may vibrate with respect to the guide rail during traveling of the vehicle, so that the guide roller may collide with the guide rail and generate noise.

The present invention has been made in consideration of the above circumstances, and has as its object to provide a tailgate lift device that can reliably prevent noise from being generated when the tailgate is housed.

[0006]

According to a first aspect of the present invention, there is provided a pair of columns arranged on both sides in the vehicle width direction at a rear end portion of a cargo bed, and installed on each of these columns. A pair of guard rails extending in the longitudinal direction and having a rectangular cross-sectional shape, and a pair of sliders provided with guide rollers capable of rolling in the guide rails and capable of moving up and down along the guide rails; A tail gate rotatably supported by the pair of sliders via a pivot shaft, the tail gate being rotatable about the pivot shaft between a load receiving state and a storage state. In a tailgate device for placing a load on the tailgate and raising and lowering the tailgate in a load receiving state, an arm disposed in the guide rail and fixed to the pivot shaft of the tailgate, A contact member provided at the tip of the arm and provided integrally with the tail gate and rotatably.When the tail gate is stored, the contact member abuts on the inner surface of the guide rail, The guide roller of the slider can be pressed against another portion of the inner surface of the guide rail.

According to a second aspect of the present invention, the contact member according to the first aspect is a roller bush having an elastic material interposed between metallic rings having different diameters.

[0008]

According to the tailgate lift device of the first aspect, the following effects are obtained. In the retracted state of the tailgate, the contact member provided at the base end of the tailgate via the pivot shaft and the arm abuts on the inner surface of the guide rail, and the guide roller of the slider is moved to the other portion of the inner surface of the guide rail. Press Therefore, when the tailgate is stored, the slider is supported by the guide rail at a plurality of points by the guide roller and the contact member, and is integrated with the guide rail. As a result, in the stored state, the guide roller does not vibrate and collide with the guide rail, and the generation of noise can be reliably prevented.

According to the second aspect of the present invention, the following effects are obtained. Since the contact member is constituted by a roller bush in which a metal ring is disposed on the inner surface and the outer surface of the elastic material, when the roller bush abuts on the guide rail, the guide roller is moved by the reaction force of the elastic material. The slider can be strongly pressed against the inner surface of the guide rail, and the slider can be firmly integrated with the guide rail.

Since the metal ring is arranged on the outer periphery of the elastic member, the roller bush is not scraped by the guide roller when the roller bush comes into contact with the guide rail, and the life of the roller bush can be extended. it can.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a vehicle to which an embodiment of a tailgate lift device according to the present invention is applied. FIG.
FIG. 2A is a side sectional view of the tailgate lift device of FIG.
FIG. 2B is a sectional view taken along the line IIB-IIB in FIG. FIG. 3 is a sectional view taken along line III-III in FIG. FIG. 4 is a view taken in the direction of the arrow IV in FIG. FIG. 5 is a side cross-sectional view of the tailgate lift device of FIG. 1 in which the tailgate is in a housed state. FIG. 6 is a sectional view taken along the line VI-VI of FIG. FIG. 7 (A) is similar to FIG. 2 (A) and FIG.
FIG. 7B is a front view showing the roller bush of FIG.
It is sectional drawing which follows the VIIB-VIIB line of FIG. 7 (A). FIG. 8 is a perspective view showing the slider and the roller bush of FIG.

As shown in FIG. 1, a tailgate lift device 10 is installed at the rear end of a loading platform 2 of a truck 1 as a cargo handling vehicle. This tailgate lift device 10
The tailgate 11 is raised and lowered in a vertical direction along the pair of columns 12, thereby facilitating a loading / unloading operation of loading and unloading luggage (not shown) on the loading platform 2.

The above tailgate lift device 10 is shown in FIG.
As shown in FIG. 2 and FIG. 2, the above-described tail gate 11 and support column 12, the main mounting bracket 13, the sub mounting bracket 14, the guide rail 15, the slider 16, the cylinder device 17, the wire 18 as a rope, and the rope guide. Is configured.

The main mounting bracket 13 is mounted on the truck 1
Are arranged in the width direction of the vehicle along the loading platform 2, and a pair of columns 12 are fixed to both ends thereof in an upright state. The sub-mounting bracket 14 has a substantially triangular shape in a side view, and is integrally fixed to the main mounting bracket 13 in an upright state along the side tilts 3 provided on both sides of the bed 2 of the truck 1. This sub-mounting bracket 14
Further, the support 12 is fixed to the support 12 so as to maintain the support 12 in an upright state.

The pair of columns 12 extend from the upper side to the lower side of the carrier 2 and have a substantially rectangular cross section. The support plate 20 is hung over the lower end of the support 12 to reinforce the standing state of the support 12. The guide rail 15 is fixed to each of the columns 12 over the entire length in the longitudinal direction. Each of the guide rails 15 is configured to have a substantially rectangular cross section, and a guide slit 21 is formed inside (on the vehicle center side) over the entire length in the longitudinal direction.

The sliders 16 are provided on the respective guide rails 15. The pair of sliders 16 pivotally support the tailgate 11 via a pivot shaft 30 so that the tailgate 11 can be opened and closed. The tailgate 11 can be held in parallel with the carrier 2 of the truck 1 in the open state in the cargo receiving state, and can be erected at right angles to the carrier 2 in the closed state in the stored state as shown in FIG. It is said.

When the tailgate 11 is stored, the locking claw 22 fixed to the tip of the tailgate 11 is supported by the support 1.
2 is engaged with the locking hook 23 at the upper end of the tailgate 1.
The tailgate 11 serves as a rear door of the carrier 2 while the storage state of the storage gate 1 is maintained.

A pair of roller shafts 24 are fixed to the slider 16 at the upper and lower portions in FIG. 2, and an upper guide roller 25 and a lower guide roller 26 are rotatably supported by the respective roller shafts 24. The roller shaft 24 is inserted through the guide slit 21 of the guide rail 15, and the guide rollers 25 and 26
5, and is provided so as to be able to roll on the inner surface of the guide rail 15 in the vehicle front-rear direction. The slider 16 can be moved up and down along the guide rail 15 by these guide rollers 25 and 26.

The cylinder device 17 includes a pair of columns 12.
Each is housed in and is bolted. A pulley fixing bracket 28 is fixed to the tip of the piston rod 27 of each of the cylinder devices 17. The tip of the pulley fixing bracket 28 has a bifurcated shape, and the pulley 19 is rotatably supported by the tip of the pulley fixing bracket 28.

The tip of the wire 18 has a slider 16
, Is wound around the pulley 19 from above, and the base end is supported by the bottom of the column 12.

With the tailgate 11 in a load receiving state, the cylinder devices 17 in the pair of columns 12 are operated, and the piston rods 27 are advanced and retracted in synchronization, whereby the pulley 19 at the tip of the piston rod 27 is moved. Ascends and descends, and the slider 16 is moved via the wire 18 to the guide rail 1.
5, the tail gate 11 rises or falls between the solid line and the two-dot chain line in FIG. Therefore, by placing the luggage on the tailgate 11, the work efficiency of loading and unloading luggage at the rear end of the bed 2 of the truck 1 is improved.

Now, as shown in FIGS. 2, 5 and 8,
The pivot shaft 30 is fixed to the base end of the tailgate 11 and is inserted through the lower end of the slider 16 to enable the tailgate 11 to rotate with respect to the slider 16. The pivot shaft 30 reaches the inside of the guide rail 15 through the guide slit 21 of the guide rail 15, and an arm 31 is fixed to a distal end portion by a mounting bolt 32. Further, a roller bush 33 as a contact member is rotatably supported at the tip of the arm 31. The arm 31 and the roller bush 33 are disposed inside the guide rail 15.

As shown in FIG. 4, the arm 31 has a predetermined angle θ with respect to the tail gate 11 (θ ≒ 90 in this embodiment).
°). At the base end of the arm 31, a fixing pin 38 is disposed adjacent to the mounting bolt 32. The fixing pin 38 penetrates from the arm 31 to the pivot shaft 30, and the arm 31 is attached to the pivot shaft 30 by the mounting bolt 3.
It is a detent that is fixed so that it does not rotate twice. The arm 31 is connected to the tail gate 11 by the fixing pin 38.
And is provided so as to be able to rotate integrally.

Therefore, in the state where the tail gate 11 is received, the roller bush 33 does not come into contact with the inner surface of the guide rail 15 as shown in FIGS.
In the stored state, as shown in FIGS. 5 and 6, the inner surface 15A of the guide rail 15 can be contacted. By contact of the roller bush 33 with the inner surface 15A, the lower guide roller 26 can be pressed against the other inner surface 15B of the guide rail 15, and the upper guide roller 25 can be pressed against the inner surface 15A of the guide rail 15. Is done.

As shown in FIG. 7, the roller bush 33 has a structure in which a synthetic rubber 36 as an elastic material is interposed between an outer ring 34 and an inner ring 35 having different diameters made of metal, for example, iron. Is done. The inner ring 35 of the roller bush 33 is loosely fitted on the support shaft 37 implanted at the tip of the arm 31, and the outer ring 34 can be brought into contact with the inner surface 15 </ b> A of the guide rail 15.

According to the above embodiment, when the tailgate 11 is stored (FIG. 5), the roller bush 33 provided at the base end of the tailgate 11 via the pivot shaft 30 and the arm 31 has the guide rail. 15 contacts one inner surface 15A. As a result, the slider 16 is rotated such that the lower end side (the roller bush 33 side) approaches the other inner surface 15B side of the guide rail 15 and the upper end side approaches the one inner surface 15A side of the guide rail 15, respectively. The lower guide roller 26 is pressed against the other inner surface 15B of the guide rail 15, and the upper guide roller 25 is pressed against one inner surface 15A of the guide rail 15. Thus, the slider 1
6 is a roller bush 33 with respect to the guide rail 15;
It is supported at three points by an upper guide roller 25 and a lower guide roller 26 and is integrated with the guide rail 15.
Therefore, with the tail gate 11 stored, the guide roller 2
5 and 26 do not vibrate and collide with the guide rails, and the generation of noise can be reliably prevented.

The roller bush 33 is made of synthetic rubber 3
6, inner ring 35 and outer ring 34 on the inner and outer surfaces
Is arranged, the roller bush 33
The lower guide roller 26 is moved to the other inner surface 15B of the guide rail 15 and the upper guide roller 25 is moved to the inner surface 15A of the guide rail 15 by the reaction force of the synthetic rubber 36 at the time of contact with the inner surface 15A of the guide rail 15. Can be strongly pressed. As a result, the slider 16 can be firmly integrated with the guide rail 15.

Further, since the outer ring 34 made of metal is arranged on the outer periphery of the synthetic rubber 36, even when the roller bush 33 comes into contact with the inner surface 15A of the guide rail 15, the inner surface 15A As a result, the roller bush 33 is not scraped, and therefore, the life of the roller bush 33 can be extended.

In the above embodiment, the roller bush 33 is used.
Are outer ring 34, inner ring 35 and synthetic rubber 3
Although the structure described in No. 6 has been described, it may be entirely formed of synthetic rubber or metal. In the above embodiment,
Although the case where the mounting angle θ of the arm 31 to the tailgate 11 is about 90 degrees has been described, it may be set slightly larger or smaller than 90 degrees (for example, 100 degrees).

[0030]

As described above, according to the tailgate lift device of the present invention, it is possible to reliably prevent noise from being generated when the tailgate is stored.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a vehicle to which an embodiment of a tailgate lift device according to the present invention is applied.

2 (A) is a side cross-sectional view of the tailgate lift device of FIG. 1 with a tailgate in a receiving state, and FIG. 2 (B) is a sectional view taken along line IIB-IIB of FIG. 2 (A). It is sectional drawing which follows.

FIG. 3 is a sectional view taken along the line III-III in FIG. 2 (A).

FIG. 4 is a view on arrow IV in FIG. 3;

FIG. 5 is a side cross-sectional view of the tailgate lift device of FIG. 1 in which a tailgate is in a housed state.

FIG. 6 is a sectional view taken along the line VI-VI in FIG. 5;

7 (A) is a front view showing the roller bush of FIGS. 2 (A) and 5, and FIG. 7 (B) is FIG. 7 (A).
FIG. 7 is a sectional view taken along line VIIB-VIIB of FIG.

FIG. 8 is a perspective view showing the slider and the roller bush of FIG. 4;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 track 2 carrier 10 tailgate lift device 11 tailgate 12 support 15 guide rail 15A one inner surface of guide rail 15B other inner surface of guide rail 16 slider 25 upper guide roller 26 lower guide roller 30 pivot shaft 31 arm 33 roller bush 34 Outer ring 35 Inner ring 36 Synthetic rubber

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-53254 (JP, A) JP-A-60-148729 (JP, A) Real opening Sho-63-59047 (JP, U) (58) Field (Int.Cl. ⁷ , DB name) B60P 1/46

Claims (2)

(57) [Claims] 1. A pair of struts arranged on both sides in the vehicle width direction at the rear end of a cargo bed, and a pair of struts installed on each of the struts, extending in the longitudinal direction of the struts, and having a rectangular cross-sectional shape. A guard rail, a pair of sliders provided with guide rollers capable of rolling in these guide rails and provided so as to be able to move up and down along the guide rail, and a base end portion of the pair of sliders being pivotally connected to the pair of sliders. A tailgate rotatably provided around the pivot shaft between a load receiving state and a storage state, and a load is placed on the tailgate in the load receiving state of the tailgate. In a tailgate device for lifting and lowering a lever tailgate, an arm disposed in the guide rail and fixed to the pivot shaft of the tailgate; And a contact member provided integrally with the guide rail. The contact member abuts on an inner surface of the guide rail when the tail gate is housed, so that the guide roller of the slider is brought into contact with the guide rail. A tailgate lift device capable of being pressed against another portion of the inner surface of the tailgate. 2. The tailgate lift device according to claim 1, wherein the contact member is a roller bush having an elastic material interposed between metal rings having different diameters.