JP2547570Y2 - Clamping device - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to an upper frame as one clamped member for mounting an upper mold and a lower clamp as another clamped member for mounting a lower mold in order to form, for example, an automobile seat cushion. The present invention relates to a device for clamping a frame.

[0002]

2. Description of the Related Art Cold molding or molding with different hardness and hot molding are generally used for molding a seat cushion of an automobile. However, foam molding such as polyurethane foam is injected into a mold. In such a case, cold molding and molding with different hardness have come to be widely used because of good cushioning property.

However, in cold forming and molding with different hardness,
Since a large gas vent hole is not provided unlike hot molding to improve cushioning properties, the internal pressure of the die becomes high. Therefore, the clamp device that clamps the upper and lower molds during molding cannot withstand the internal pressure with a commercially available one,
In addition, there is a problem in durability due to heating at the time of molding, and it is presently difficult to take measures.

[0004]

The problem to be solved by the present invention is to provide a clamping device with a strong clamping force capable of sufficiently withstanding a large internal pressure and durability, as in the case of molding an automobile seat cushion. It is in.

[0005]

According to the present invention, a clamping device includes a hook fixed to a locking pin fixed to one clamped member and a fulcrum pin fixed to a bracket fixed to the other clamped member. The attached operating rod, the connecting pin with the hook pivotally attached to the operating rod, and the hook that is fitted into the guide hole provided in the bracket and moves in conjunction with the rotation of the operating rod are locked to the locking pin. It consists of a guide roller that connects the hook and the bracket to be released.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The drawings show a clamp device A for clamping an upper frame for mounting an upper die and a lower frame for mounting a lower die, which are used for molding the seat cushion for an automobile. Of course, the clamp device of the present invention can also be used to clamp different clamped members.

Reference numeral 1 denotes an upper frame, which is one of the clamped members, to which an upper mold (not shown) is mounted. Reference numeral 2 denotes a lower frame, which is the other clamped member, for mounting a lower mold (not shown). Reference numeral 3 denotes a movable base, which is fixed to the front surface of the upper frame 1 so that the vertical position can be adjusted. Lock pins 5 are fixed to both legs of the U-shaped bracket 4 fixed on the movable base 3. .

Reference numeral 6 denotes a fixing base fixed to the front surface of the lower frame 2, and a bracket 7 is provided upright on the upper surface thereof. Reference numeral 8 denotes a guide plate, which is fixed to the upper end of the bracket 7 so as to adjust the left and right positions, and has a guide hole 9 formed therethrough. The guide hole 9 is formed by a guide portion 9a that is inclined slightly downward to the right and a lock portion 9b that is bent downward.

Reference numeral 10 denotes a plate-like operating rod, whose upper end is pivotally connected to the fulcrum 7 by a fulcrum pin 11, and whose lower end is fixed to the connecting rod 2a of the lower frame 2.

Reference numeral 12 denotes a hook, the upper end of which is formed in a beak shape so as to be able to be locked and released from the locking pin 5, and the lower end is pivotally connected to the operating rod 10 by a connecting pin 13. Reference numeral 14 denotes a guide roller, one end of which is rotatably fitted in the guide hole 9, and a shaft of the guide roller 14 is pivotally attached to an upper end of the hook 12. 15 is the operating rod 10
A steel ball pushed toward the operating rod 10 by a compression spring fits into a V-shaped hole formed in the operating rod 10 in the cylinder fixed to the bracket 7, 10 is stopped at the clamp and unclamping positions.

As shown in FIG. 4, four such clamping devices A are arranged at equal intervals in the embodiment on the front surfaces of upper and lower frames 1 and 2 whose rear portions are connected to each other by a hinge (not shown). . 1a is a roller for opening and closing the upper frame 1, and 2b is a roller for clamping.

[0012]

In the clamped state of the upper and lower frames 1 and 2 shown in FIGS. 1, 2 and 4, the hook 12 is locked by the locking pin 5, and the guide roller 14 is locked by the lock portion 9b of the guide hole 9.
And the hook 12 is locked.

When the clamp is released, when the clamp roller 2b is rotated upward, the operating rod 10 is rotated upward with the fulcrum pin 11 as a fulcrum. Therefore, the operating rod 10
The hook 12 connected to the fulcrum pin 13 with the fulcrum pin 1
It rotates upward with 1 as a fulcrum. As a result, the guide roller 14 is disengaged from the lock portion 9b of the guide hole 9 and rises the guide portion 9a, so that the hook 12 is released from the locking pin, and the upper and lower frames 1 and 2 are unclamped.

When clamping, the clamping roller 2
When b is rotated downward, the connecting rod 2a and the operating plate 10 also rotate downward with the fulcrum pin 11 as a fulcrum. For this reason, the hook 12 also pivots downward about the connection pin 13 as a fulcrum,
The upper end of the hook is guided by the guide roller 14 that rolls on the guide portion 9a, and moves to the locking pin 5 side. Finally, the upper end of the hook 12 is locked by the locking pin 5, and the guide roller 14 is fitted into the lock portion 9b to be in a clamped state.

In the embodiment, since the upper and lower frames 1 and 2 are provided with the four clamp devices A connected to each other by the connecting rods, all the clamp devices A are simultaneously clamped and unclamped.

[0016]

[Effect of the Invention] Clamping and unclamping can be performed with a strong force by an easy operation of rotating the operating rod without a troublesome operation such as rotating a screw. Also, since the configuration is simple, there is no failure and the durability is high.

If formed as in the embodiment, a plurality of clamping devices can be operated at a time, and it is possible to cope with dies having different sizes.

[Brief description of the drawings]

FIG. 1 is a side view of a clamped state.

FIG. 2 is a front view of a clamped state.

FIG. 3 is a side view of a main part in an unclamped state.

FIG. 4 is a schematic front view showing the entire upper frame and lower frame.

[Description of sign]

 A Clamping device 1 Upper frame 2 Lower frame 5 Locking pin 7 Bracket 9 Guide hole 10 Operating rod 11 Support pin 12 Hook 13 Connecting pin 14 Guide roller

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location B29L 31:58

Claims (1)

(57) [Scope of request for utility model registration] 1. A hook for locking to a locking pin fixed to one clamped member, an operating rod pivotally connected to a bracket fixed to the other clamped member by a fulcrum pin, and an operating rod A connecting pin pivotally mounted on the guide plate and a guide which is fitted into a guide hole provided in the guide plate and locks and releases the hook which moves in conjunction with the rotation of the operating rod with the locking pin, and connects the hook and the bracket. Clamping device consisting of rollers.