JPH0966767A - Coupling device of tail gate constituting panel in car rear body equipped with tail gate lifter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure a loading surface being excellent in good appearance with no hindrance to material handling operations by facilitating the manufacture of a tail gate in a car rear body equipped with a tail gate lifter, and reducing the extent of manufacturing cost. SOLUTION: A tail gate is composed of plural pieces of aluminum extruded shape panels 7. Each of fitting parts 7a and 7b is installed in the opposed side edges of these tail gate constituting panels 7 being adjacent with in front and in the rear, getting these elements fitted in each other. Two horizontal walls 13 and 25 being superposed on each other up and down at the upper side are installed in both these fitting parts 7a and 7b, and two connecting pin inserting hole forming grooves 17 and 28 extending in the longitudinal direction are opposedly installed in both these horizontal walls 13 and 25. A connecting pin 33 is fitted tight in a connecting pin inserting hole 31 formed by two grooves 17 and 28. Subsequently both lower end edges 16a and 27 of the opposed side edges of both the panels 7 are welded together.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for connecting tailgate constituting panels in a vehicle carrier such as a truck equipped with a tailgate lifter (a rear side wall elevator).

In this specification, the term "aluminum" includes aluminum alloy as well as pure aluminum.

[0003]

2. Description of the Related Art A tailgate lifter is a device for loading and unloading heavy objects by horizontally raising and lowering the tailgate of a loading platform such as a truck. Conventionally, the tailgate used for this is a plurality of aluminum extrusions. It is formed by welding and connecting the upper and lower edges of the opposite side edge of the shaped panel.

[0004]

However, since a jig and a method for restraining the tailgate-constituting panel in the assembled state during welding become complicated, a high level of skill is required and a lot of man-hours are required. Therefore, there is a problem that the manufacturing cost is high.

Further, since the weld bead rises on the upper surface of the tailgate, that is, at the joint between the panels on the loading surface, luggage is caught by these weld beads during cargo handling work, and There was an inconvenience that the aesthetics were spoiled.

The present invention has been made in view of the above-mentioned problems, and it is easy to manufacture, the manufacturing cost can be kept low, and a loading surface having an excellent appearance without hindering the cargo handling work can be obtained. An object of the present invention is to provide a connecting device for a tailgate-constituting panel in a vehicle bed having a tailgate lifter that is provided.

[0007]

In order to achieve the above-mentioned object, a device for connecting a tailgate constituting panel in a vehicle bed having a tailgate lifter according to the present invention has a tailgate for a vehicle bed having a tailgate lifter. Is composed of a plurality of aluminum extruded profile panels, the fitting portions provided on the opposite side edges of the front and rear adjacent tailgate constituting panels are fitted to each other, and both fitting portions are Has upper and lower horizontal walls, which are vertically overlapped with each other, and these horizontal walls are provided with connecting pin fitting hole forming grooves extending in the lengthwise direction so as to face each other, and are formed by these grooves. The connecting pin is tightly fitted into the formed connecting pin fitting hole, and the lower end edges of the opposite side edge portions of both panels are welded to each other.

According to the above invention, the fitting portions respectively provided on the opposite side edge portions of the front and rear adjacent tailgate constituting panels are fitted to each other, and both fitting portions are superposed on each other on the upper side thereof. There are horizontal walls to be fitted together, and these horizontal walls are provided with connecting pin fitting hole forming grooves extending in the lengthwise direction so as to face each other, and the connecting pin fitting holes formed by these grooves are formed. Since the connecting pins are tightly fitted in and the lower edges of the opposite side edges of both panels are welded to each other, the upper sides of the fitting portions of both panels are connected by the connecting pins, and The lower edges of the side edges can be welded together, thus facilitating the restraint of the panel for welding work. Further, the welding cost is halved as compared with the conventional device, so that the manufacturing cost is significantly reduced. Further, unlike the conventional device, since the welding bead does not rise on the upper surface of the tailgate, that is, the joint between the panels on the loading surface, the cargo handling work can be easily performed, and the tailgate excellent in aesthetic appearance can be obtained.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings.

In this specification, "front and rear" are based on FIG. 2, "front" means the left of FIG. 2, and "rear" means the same right.

FIG. 1 shows a tailgate lifter (3) provided at a rear portion of a truck carrier (1). The tailgate lifter (3) includes a pair of left and right leg members (5) and a leg member.
A slide member (6) that can be moved up and down along (5) and a tailgate that is attached to the slide member (6) so that it can be raised and lowered.
(4) and are provided.

The tailgate (4) is composed of a plurality of aluminum hollow extruded profile panels (7). Each panel
On the upper surface of (7), there are uneven parts for non-slip that extend in the length direction.
(8) and (9) are formed alternately, which effectively prevents slipping of luggage during loading and unloading work and slipping of work legs (see FIG. 2). A partition wall (10) for partitioning the panel (7) into front and rear is provided in the hollow portion of each panel (7) (see FIG. 2).

FIG. 3 is an enlarged view showing a connecting portion between the opposite side edges of the front and rear adjacent tailgate constituting panels (7), and the rear edge and the rear panel of the front panel (7).
The front edge of (7) has a fitting part (7a) that is fitted together.
(7b) are provided respectively.

The fitting portion (7a) provided on the rear edge of the front panel (7) extends to the rear edge of the upper wall (11) and extends downward from the rear edge of the front panel (7) to substantially the same height as the panel (7). A hanging wall (12) reaching the central part, an upper horizontal wall (13) extending rearward from the upper end of the hanging wall (12),
An intermediate convex portion (15) having a substantially U-shaped cross section, which is provided between the lower end of the hanging wall (12) and the lower wall (14) and projects rearward;
4) Consists of a lower horizontal wall (16) extending rearward from the rear edge. The protruding lengths of the upper horizontal wall (13) and the intermediate convex portion (15) are the same, but the protruding length of the lower horizontal wall (16) is the same as the upper horizontal wall (13) and the intermediate convex portion (15). It is about twice as long as the protruding length. The rear edge of the upper wall (11) and the front end (16a) of the lower horizontal wall (16) are both inclined rearward and downward. At the center of the width of the lower surface (13a) of the upper horizontal wall (13), a connecting pin insertion hole forming groove (17) having a semicircular cross section is formed over the entire length of the front panel (7). .

On the other hand, the fitting portion (7b) provided at the front edge of the rear panel (7) has an upper first horizontal wall (22) extending forward from the front edge of the upper wall (21). ), And the upper wall (21) and lower wall (23)
A vertical front side wall (24) provided between the front edges of the front side wall and an upper second horizontal wall (2) extending forward from the upper end of the front side wall (24).
5), a lower horizontal wall (26) extending forward from the front edge of the lower wall (23), and a step formed rearward from the front edge of the lower wall (23) by a predetermined length. (27) and its lower surface is the lower horizontal wall
It is composed of a lower wall portion (23a) on the front side of a step (27) flush with the lower surface of (26). Upper first and second
The protruding length of the horizontal walls (22) and (25) depends on the front panel (7).
The length of the lower horizontal wall (23a) and the length of the lower wall (23a) in front of the step (27) are the same as the protruding lengths of the upper horizontal wall (13) and the intermediate convex portion (15) at the rear edge of the lower horizontal wall (26). The sum of and is equal to the protruding length of the lower horizontal wall (16) at the trailing edge of the front panel (7). A tip portion of the upper first horizontal wall (22) is formed as an inclined surface that is inclined forward and upward. The upper surface of the upper second horizontal wall (25) (25
A connecting pin insertion hole forming groove (28) having a semicircular cross section is formed in the center of the width in (a) over the entire length. The step (27) of the lower wall (23) is formed by an inclined wall rising upward.

Therefore, the rear edge of the front panel (7) and
By combining with the front edge of the rear panel (7),
Fitting portions (7a) and (7b) formed in the same portion are fitted to each other. That is, in the recess (29) formed by the upper first and second horizontal walls (22) and (25) and the front side wall (24) of the rear panel (7),
The upper horizontal wall (13) of the front panel (7) was fitted and formed by the upper second horizontal wall (25), the front side wall (24) and the lower horizontal wall (26) of the rear panel (7). The intermediate convex portion (15) of the front panel (7) is fitted into the concave portion (30), and the lower horizontal wall (26) of the rear panel (7) and the lower wall portion (23a) on the front side of the step (27). The lower horizontal wall (16) of the front panel (7) is superposed on the lower side of the. In this state, the groove (17) in the lower surface (13a) of the upper horizontal wall of the front panel (7) and the groove (28) in the upper surface (25a) of the upper second horizontal wall of the rear panel (7) make a cross section. A circular connecting pin fitting hole (31) is formed. Also, the front panel
(7) lower horizontal wall (16) tip (16a) and rear panel
A groove (32) for arranging a weld bead having an inverted V-shaped cross section is formed between the lower wall (23) and the step (27) of the lower wall (23).

The connecting pin (33) made of a relatively short stainless steel parallel pin or taper pin is tightly fitted into the left and right ends of the connecting pin fitting hole (31), whereby the front and rear side panels are joined together. The upper parts of the opposite side edges in (7) are connected to each other. At this time, the upper horizontal wall (13) of the front panel (7) and the upper second horizontal wall (25) of the rear panel (7) each try to deform vertically, but the upper horizontal wall (13) of the front panel (7) is deformed. Above the horizontal wall (13) is the upper first horizontal wall (22) of the rear panel (7).
Since the intermediate convex portion (15) of the front panel (7) exists below the upper second horizontal wall (25) of (7), these upper first horizontal wall (2)
The deformation is prevented by 2) and the intermediate convex portion (15), and the connection by the connecting pin (33) is favorably performed. In addition, the upper first
Regarding the horizontal wall (22) and the intermediate convex portion (15), the upper horizontal wall (13) of the front panel (7) and the upper second horizontal wall (25) of the rear panel (7) should not be deformed when the pins are fitted. It can be appropriately changed as long as it can be prevented. For example, the upper first horizontal wall (22) may be longer than that shown in FIG. Good. Similarly, the intermediate convex portion (15) may be entirely constituted by one wall. Although the connecting pin (33) and the connecting pin fitting hole (31) shown in the drawing have a circular cross section, these shapes are not limited to those shown in the drawing, and may be, for example, a rectangular cross section. In addition to the above-mentioned connecting pin (33), a parallel pin that is loosely fitted into the connecting pin fitting hole (31) may be fitted in an intermediate portion of the length of the connecting pin fitting hole (31). Bonding strength increases. In addition,
Applying the connection with the connecting pin (33) to the connection between the lower parts of the opposite side edges of the front and rear panels (7) also
Although theoretically possible, such a configuration is considered to be impractical because rattling easily occurs due to dimensional accuracy and the bonding strength may be insufficient.

Next, the front end (16a) of the lower horizontal wall (16) of the front panel (7) and the step (27) of the lower wall (23) of the rear panel (7) are joined, for example, by arc welding or the like. To join. At this time, since the upper parts of the opposite side edges of the front and rear panels (7) are already connected by the connecting pins (33) as described above, the panels (7) are restrained to perform the welding work. It's very easy to keep. From the viewpoint of joint strength, it is most preferable to perform welding over the entire length of the panel (7), but considering the combination with the connecting pin (33) and the usage conditions, etc., only partial welding is possible. Even if it does, the required strength can be obtained. Weld beads (33) are located on the front panel (7) at the tip (16a) of the lower horizontal wall (16) and at the rear panel.
Since most of the weld bead placement groove (32) formed between the lower wall (23) and the step (27) of the lower wall (23) is accommodated, it is located below the lower surface of the panel (7). Is only slightly protruding. Also, in the lower part of the opposite side edge of the front and rear both-side panels (7), the lower side of the lower wall part (23a) on the front side of the lower horizontal wall (26) and the step (27) of the rear panel (7). Since the lower horizontal wall (16) of the front panel (7) is overlapped with each other and a large amount of overlap margin is provided, the bending strength of the same part is strengthened by this.

The fitting portion at the rear edge of the front panel (7)
(7a) and the fitting portion (7b) at the front edge of the rear panel (7) may of course be the opposite of the above. Further, the shape of the opposite side edge portion of the panel (7) is not necessarily limited to that shown in the figure, and in short, the upper side thereof can be connected by the connecting pin and the lower end edges thereof can be welded. If it is one, the present invention can be applied.

[0020]

According to the connecting device for the tailgate-constituting panels in the vehicle bed having the tailgate lifter of the present invention, the fitting portions provided on the opposite side edge portions of the panels adjacent to each other in the front and rear direction are fitted to each other. Since the lower ends of the opposite side edges of both panels can be welded together after connecting the upper sides of the panels with the connecting pin, the panels can be easily restrained for the welding work. Further, the welding cost is halved as compared with the conventional device, so that the manufacturing cost is significantly reduced.
Further, unlike the conventional device, since the welding bead does not rise on the upper surface of the tailgate, that is, the joint between the panels on the loading surface, the cargo handling work can be easily performed, and the tailgate excellent in aesthetic appearance can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic partial perspective view of a truck bed including a tailgate lifter.

FIG. 2 is a partial perspective sectional view of the tailgate showing the embodiment of the present invention.

FIG. 3 is an enlarged sectional view of a main part of FIG.

[Explanation of symbols]

 (1) Truck carrier (3) Tailgate lifter (4) Tailgate (7) Tailgate configuration panel (7a) Mating part (7b) Mating part (13) Upper horizontal wall at rear edge of front panel (25) Upper second horizontal wall at the front edge of the rear panel (17) Groove for forming connecting pin fitting hole (28) Groove for forming connecting pin fitting hole (31) Connecting pin fitting hole (33) Connecting Pin (16a) Tip of lower horizontal wall at rear edge of front panel (27) Step on bottom wall of rear panel

Claims (1)

[Claims] 1. The tailgate (4) of a vehicle bed (1) having a tailgate lifter (3) is composed of a plurality of aluminum extruded profile panels (7), and the tailgates are adjacent to each other in the front and rear. The fitting parts (7a) and (7b) provided on the opposite side edges of the component panel (7) are fitted to each other, and the fitting parts (7a) and (7b) are vertically stacked on top of each other. There are horizontal walls (13) and (25) that are aligned with each other, and these horizontal walls (13) and (25) are provided with connecting pin fitting hole forming grooves (17) and (28) that extend in the lengthwise direction. The connecting pin fitting hole (31) formed by these grooves (17) (28)
The connecting pin (33) is tightly fitted to the both panels (7) (7).
A connecting device for a tailgate-constituting panel in a vehicle bed having a tailgate lifter, in which lower end edges (16a) (27) of opposite side edge portions of are welded to each other.