JP2537306Y2 - Structure of hinge for table folding of tail 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 tail lift device (FIG. 6 or 9) which is a cargo handling device for a van type vehicle or the like. More specifically, a hinge for folding a table in a tailgate lifter device provided with a lifting device of a parallel link type or a vertical lifting drive type and a foldable table. It is about structure.

[0002]

2. Description of the Related Art Conventionally, a folding hinge structure of this type of teller-tifter device is disclosed in Japanese Unexamined Utility Model Publication No. 1-15444.
No. 1 discloses this. As shown in FIG. 7, the hinge a for connecting the adjacent tables A and B in a foldable manner hinges the adjacent tables A and B in the closest state. Yes, but tables A and B for uniaxial hinge
Present as protrusions on top. For this reason, the cargo handling work, particularly the movement of the pallet with casters, is dangerous. As another example, Japanese Utility Model Publication No. Hei 4-9220 is disclosed. As shown in FIG. 8, there is a structure in which tables A and B are connected by a double hinge b to avoid the above-mentioned disadvantage.
This structure has a disadvantage that the opposing ends of the adjacent tables A and B are largely separated from each other as shown by reference numeral c in FIG.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned disadvantages of the prior art. That is, when the adjacent tables A and B are in a substantially horizontal state,
It is an object of the present invention to bring the opposing edges into contact with each other and prevent projections from being formed on the table surface.

[0004]

Means for Solving the Problems In a hinge structure for connecting a table A and a table B in a foldable manner in a tailgate lifter device comprising a lifting device and a foldable table. The hinges for folding the tables A and B are a plurality of hinge brackets 1, a plurality of hinge links 2, two hinge pins 3 inserted into the hinge links 2, and a hinge bracket 1. The vertical rib 5a on the table A and the vertical rib 5b on the table B are in close contact with each other at the hinge mounting portion, and the vertical rib on the table A is 5a and tape
A hinge bracket 1 is provided at the top of the vertical rib 5b on the bull B side.
And a hinge mounting recess 7 having the same depth as the thickness t of the hinge portion 1b and having a concave groove 6 into which the main body portion 1a of the hinge bracket 1 is fitted, and the hinge bracket 1 is provided with the hinge mounting recess. 7, a main body 1a to be fitted into the concave groove 6;
A hinge portion 1b having a thickness t greater than that of the main body portion 1a and having a semicircular cross section at an end surface is provided, a hinge pin insertion hole 1c is formed in the hinge portion 1b, and a lock pin 4 is provided in the main body portion 1a. Of the hinge link 2
Is composed of a main body 2a having the same thickness t as the hinge portion 1b of the hinge bracket 1 and a hinge portion 2b having a semicircular cross section at both ends, and a hole 2c for inserting the hinge pin 3 into the left and right hinge portions 2b. And the table A
Side vertical rib 5a is provided with a vertically protruding flange 5'a,
A horizontal recess 5 "a is formed between the upper and lower protruding flanges 5'a, whereas a step 5 'with which the protruding flange 5'a engages is provided above and below the vertical rib 5b on the table B side. b, and between the upper and lower step portions 5'b is a convex portion 5 "b which just fits into the concave portion 5" a.

[0005]

FIG. 1 shows a double hinge structure of the present invention. The folding hinge of the table A and the table B includes a hinge bracket 1, a hinge link 2, two hinge pins 3, and a lock pin 4 for fixing the hinge bracket 1. The hinge bracket 1 and the hinge link 2 are made of an extruded aluminum product, and are cut into appropriate lengths before use. Therefore, the manufacture of hinge parts is extremely easy. FIG. 3 shows the structure of the opposite ends of the table A and the table B. The vertical ribs 5a and 5b constituting the opposite end faces of the table A and the table B are configured so as to be fitted into and recessed. That is, the end face of the table A has a vertically protruding flange 5'a.
And a horizontal recess 5 "a between the upper and lower flanges 5'a.
It has become. On the other hand, the table B side is a step 5'b with which the protruding flange 5'a is engaged. Between the steps 5'b, there is a projection 5 "b which just fits into the recess 5" a. Has become. With this configuration, of the loads acting on the joint of the tables, the tensile force X is a plane passing through the center of the hinge pins 3 and 3 in FIG. 3, and the compressive force Y is also the protruding flange 5'a.
The shearing force Z is also received at the upper and lower contact portions between the protruding flange 5'a and the step portion 5'b at the lateral contact surface of the step portion 5'b and the step portion 5'b.

In FIG. 4, a hinge bracket 1 has a main body 1a having a rectangular cross section inserted into a concave groove 6 provided on an end face of the table, a thickness t larger than the main body 1a, and a semicircular cross section at the end face. The hinge 1b is provided with a hinge pin insertion hole 1c. 1d is lock pin 4
Insertion hole. The table A corresponds to the insertion hole 1d.
The table B also has a lock pin insertion hole 1e (FIG. 1).

The hinge link 2 includes a main body 2a having the same thickness t as the hinge portion 1b of the hinge bracket 1 and a hinge portion 2b having a semicircular cross section at both ends. A hinge pin is provided at the center of the hinge portion 2b. A hole 2c for inserting the hole 3 is formed. At the top of the vertical rib 5a of the table A, a hinge mounting recess 7 having the same depth as the thickness t of the hinge portion 1b of the hinge bracket 1 is provided. A concave groove 6 into which the main body portion 1a of the hinge bracket 1 is fitted is connected to the hinge mounting concave portion 7 at the side. Similarly, the top of the vertical rib 5b of the table B is provided with a hinge mounting recess 7 having the same depth as the thickness t of the hinge portion 1b of the hinge bracket 1 and a concave groove 6 connected thereto. Hinge bracket 1 to assemble this
Is inserted into the concave grooves 6 of the table A and the table B, and the lock pin 4 is inserted into the hole 1e from the upper surface of the table to be integrated.

In FIG. 3, a vertical rib 5 on the end face of the table A is shown.
The vertical ribs 5b on the end face of the table B correspond to the concave portions 5 "a of the
When the projections 5 ″ b of the above are fitted and brought into close contact with each other, the top surfaces of the tables A and B are flush with each other. In this case, as shown in FIG. 5, the vertical ribs 5a and 5b of the table A and the table B may be simply brought into planar contact.

Returning to FIG. 1, table A and table A
Hinge bracket 1, hinge link 2, hinge bracket 1, hinge link 2, and hinge bracket 1 are alternately laterally arranged in the two bent portions of bull B, and can be folded by passing two hinge pins 3 through. Is combined with
The hinge link 2 is on the hinge mounting recess 7 and is only supported by the hinge pin 3.

[0010]

According to the invention of claim 1, since the hinge mounting recesses 7 of the hinge mounting portions of the tables A and B are filled with the hinge bracket 1 and the hinge link 2, the tables A and B are provided. The surface of the pallet with casters can be safely moved on the table.
In addition, since the hinge bracket 1 and the hinge link 2 can be manufactured by using an extruded die, it is possible to reduce the number of manufacturing steps which are wider than the conventional iron-made one. Further, the vertical ribs 5a and 5b at the edge portions of the table A and the table B facing each other have a concave and convex fitting structure.
Since it can support the compressive load and the shear load among the loads acting on the table, it can be provided as a table for heavy loads.

[Brief description of the drawings]

FIG. 1 is a perspective view of a folding hinge according to the present invention.

FIG. 2 shows the same folded state.

FIG. 3 is a longitudinal sectional view of a folding hinge.

FIG. 4 is an exploded view of a folding hinge.

FIG. 5 shows an embodiment in which the ends of the tables A and B do not engage with each other.

FIG. 6 is a view showing a type of tailgate lifter driven by a link mechanism having a folding table.

FIG. 7 shows a known folding table.

FIG. 8 shows a second example of the known folding table.

FIG. 9 shows a known vertical lifting link type folding table.

[Explanation of symbols]

A, B table 1 Hinge bracket 1a, 2a Body 1b, 2b Hinge 1c, 2c Hinge pin insertion hole 1d Lock pin insertion hole 1e Lock pin insertion hole 2 Hinge link 3 Hinge pin 4 Lock pin 5a, 5b Vertical rib 5 ' a Projecting flange 5'b Step 5 ″ a (for vertical ribs) Recess 5 ″ b (for vertical ribs)
Convex part 6 Concave groove 7 Hinge mounting concave part

Claims (1)

(57) [Scope of request for utility model registration] 1. A table in a tailgate lifter device comprising a lifting device and a foldable table.
In the hinge structure for connecting the (A) and the table (B) in a foldable manner, the hinges for folding the table (A) and the table (B) are provided with a plurality of hinge brackets (1). ), A plurality of hinge links (2), a hinge bracket (1), two hinge pins (3) inserted through the hinge link (2), and a hinge bracket.
It consists of a lock pin (4) for fixing (1) to the table. In the hinge mounting part, a vertical rib (5a) on the table (A) side
The vertical rib (5b) on the table (B) side and the vertical rib (5b) on the table (A) side and the top of the vertical rib (5b) on the table (B) side are hinged. Hinge part of bracket (1) (1
a hinge mounting recess (7) having the same depth as the thickness t of b) and having a groove (6) into which the main body (1a) of the hinge bracket (1) is fitted; (1) a main body (1a) fitted into the concave groove (6) of the hinge mounting concave part (7), and a hinge part having a thickness t larger than the main body (1a) and a semicircular cross section at an end surface. (1b), a hinge pin insertion hole (1c) is drilled in the hinge part (1b), and a lock pin (4) insertion hole (1) is formed in the main body part (1a).
d), the hinge link (2) has a body portion (2a) having the same thickness as the thickness t of the hinge portion (1b) of the hinge bracket (1), and both ends have a semicircular cross section. A hole (2c) for inserting a hinge pin (3) is formed in the left and right hinge portions (2b), and the vertical rib (5a) on the table (A) side is up and down. The upper and lower protruding flanges (5'a) are provided with a horizontal recess (5 "a). On the other hand, a vertical rib (5b) on the table (B) side is provided. ) Above and below have a step (5'b) with which the protruding flange (5'a) engages, and between the upper and lower steps (5'b), a convex just fitting into the recess (5 "a). The structure of the hinge for folding the table of the tail lifter device, characterized in that the hinge is a part (5 ″ b).