JP4808669B2 - Hanging cam device - Google Patents

Description

  The present invention relates to a cam device for processing a panel of an automobile or the like, for example, and relates to a suspension cam device in which a cam slider provided with a processing tool is suspended and supported by a cam holder (cam base) fixed to a moving mold. Is.

  Conventionally, in the suspension cam device 20, as shown in FIGS. 4 to 5, the structure in which the cam slider 23 is slidably supported by the cam holder 22 fixed to the movable mold 21a is the structure of the cam holder 22. A side plate 24 and an upper plate 25 that sandwich the jaw portion 23a of the cam slider 23 are provided on both side walls 22a, and the cam slider 23 is slidably suspended so as to be movable in the moving direction a of the tool. is doing.

  The cam slider 23 is suspended and moved via the cam holder 22 by the vertical movement of the movable mold 21a, and reciprocates along the inclined surface 26a of the cam driver 26 fixed to the fixed mold 21b. It is. A tool is attached to the front wall surface 23 a of the cam slider 23.

  The cam slider 23 is returned by the urging force of the return spring 27 attached to the cam holder 22 in order to move from the bottom dead center position shown in FIG. Then, the fall prevention means 28 of the cam slider 23 prevents the worker or the like from being damaged by immediately falling when the suspension structure by the side plate 24 and the upper plate 25 is removed. For example, with a safety pin 29 and a bolt 30 having a predetermined length having a flange portion 29a, a screw portion of the bolt 30 is screwed and fixed to the upper surface of the cam slider 23, and a long hole 22b of the cam holder 22 is secured. The flange 29a protrudes from the upper surface through the upper surface.

  As shown in FIG. 6A, a gap b is provided between the lower surface of the flange 29a and the upper surface of the cam holder 22, and if the cam slider 23 is dropped, the bolt 30 and the safety The pin 29 causes the flange 29a to come into contact with the upper surface of the cam holder 22 and catch it, thereby preventing further dropping.

  Further, as shown in FIG. 6B, a hanger retainer 31 is implanted and fixed on the lower surface of the side wall 22a of the cam holder 22. A gap c is provided between the lower surface of the upper plate 25 with the flange portion 31a of the hanger retainer 31, and when the upper plate 25 comes off and falls, the upper plate 25 is hooked with the flange 31a. In addition, the cam slider 23 is prevented from falling through the side plate 24.

In addition, as shown in Patent Document 1, a rod that passes through a through hole provided in the upper part of the cam slider between both side walls of the cam holder, and each end is fixed to the front wall portion and the rear wall portion, respectively. What is used as a fall prevention mechanism by providing is known.
JP 2000-158063 A

  However, in the conventional fall prevention device, the number of parts is large and the cost is high, and the mounting method is difficult to perform by inserting the rod into the hole or screwing the bolt from below. is there. The suspension cam device according to the present invention has been proposed in order to solve such a problem.

  The gist for achieving the object by solving the above-mentioned problems of the suspension cam device according to the present invention is that a cam slider provided with a processing tool is suspended by a suspension means of a cam holder fixed to a movable mold, and In the suspension cam device that is supported movably in the processing direction and moves in the processing direction with the lower slider surface coming into contact with a cam driver fixed to the fixed mold, the cam holder includes the suspension means. In addition, the cam holder is loosely fitted in a through hole provided along the machining direction at the upper part of the cam slider, and has a gap in the front and rear along the machining direction at the upper part of the cam slider. A rod-like fall prevention means fixed to one side wall of the both side walls and cantilevered is provided.

  In addition, the other side wall of the both side walls of the cam holder includes a recess into which the tip of the rod-like fall prevention means is inserted and loosely fitted.

  According to the suspension cam device of the present invention, it is only necessary to fix the rod-like fall prevention means to one side of the front side wall or the rear side wall in the machining direction of the cam holder by a method such as screwing, and it does not take time and effort. The rod-like fall prevention means is cantilevered in a substantially horizontal state between the front side wall and the rear side wall of the cam holder, so as compared to the conventional method of bolting from the bottom up and fixing. Work is easy and easy.

  A suspension cam device 1 according to the present invention will be described. Note that portions corresponding to the conventional example are denoted by the same reference numerals as in the conventional example. As shown in FIG. 1, a cam slider 3 having a tool for machining the tool attachment surface 3a at the tip is suspended by a suspension means of the cam holder 2, for example, a side plate 24 and an upper plate 25, which is fixed to a movable mold 21a. The suspension cam device 1 is lowered and supported so as to be movable in the machining direction a, and the lower slider surface 3b contacts the cam driver 4 fixed to the fixed mold 21b and moves in the machining direction a. .

  In addition to the suspension means (the side plate 24 and the upper plate 25), the cam holder 2 is loosely fitted in a through hole 3d provided along the processing direction a in the upper portion 3c of the cam slider 3. At the same time, the upper part 3c of the cam slider 3 is cantilevered and fixed to one of the side walls 2a and 2b of the cam holder 2 with a gap in the front and rear along the processing direction a. A fall prevention rod 5 means is provided.

  On the other side wall of the side walls 2a and 2b of the cam holder 2, for example, as shown in FIG. 2, a recess 2c is provided in which the tip 5a of the rod-like fall prevention rod 5 is inserted and loosely fitted. ing. The drop prevention rod 5 has a recess 2d formed on the rear side wall 2b side, and a female screw is tapped into the recess 2d and is screwed.

  The fall prevention rod 5 passes through a through hole 3d provided through the upper portion 3c of the cam slider 3 in a loosely fitted state with a gap. Further, the gap d between the front end surface of the tip portion 5 a of the fall prevention rod 5 and the bottom surface of the recess 2 c is narrowed to be shorter than the length of the screw portion of the rod 5. By doing so, even if the threaded portion of the fall-preventing rod 5 in the screwed and fixed state is loosened, it does not come into contact with the bottom surface of the concave portion 2c. The rear side wall 2b is fixed by bolts 6 and 7 in a state of being laid across the rear end surfaces of the side walls 2e in the direction orthogonal to the machining direction a of the cam holder 2.

  As another embodiment, as shown in FIG. 3, the fall prevention rod 5 cantilever is supported by reversing the relationship between the recesses of the side walls 2a and 2b and the female screw, and by forming a recess 2c on the front side wall 2a. And the internal thread is tapped, and the thread portion of the rod 5 is screwed to the bottom. The rear side wall 2b is provided with a recess 2d, and the tip 5a of the rod 5 is inserted in a loosely fitted state.

  By preventing the cam slider 3 from falling by the cantilevered fall prevention rod 5, the cam holder 2 can be easily fixed to the front side wall 2 a or the rear side wall 2 b. Further, when the jaw portion of the cam slider 3 is inserted and attached to the side plate 24 and the upper plate 25 which are the suspension means of the cam holder 2, the fall prevention rod 5 is first attached to the front side wall 2a. When the cam slider 3 is attached, it becomes a guide for inserting the cam slider 3, and after the cam slider 3 is attached, the fall prevention rod 5 is fixed to the rear side wall 2b and inserted into the through hole 3d. It serves as a guide for attaching the rear side wall 2b.

It is the perspective view (A) of the suspension cam apparatus 1 which concerns on this invention, and the side view (B) which shows a part in use state in cross section. It is a partially expanded side view of the suspension cam apparatus 1 of the same invention. It is a partially expanded side view which concerns on the other Example. It is a side view of the use condition of the cam apparatus 20 which concerns on a prior art example. It is the half sectional view which looked at some devices 20 from the front. It is explanatory drawing (A) and (B) which show the structure of the fall prevention means (29, 30).

Explanation of symbols

1 suspension cam device,
2 Cam holder,
2a front side wall, 2b rear side wall,
2c recess, 2d recess,
2e side wall,
3 Cam slider,
3a Tool mounting surface, 3b Lower slider surface,
3c upper part, 3d through hole,
4 Cam Drover,
5 Fall prevention rod,
5a tip,
6, 7 volts,
20 Conventional cam device,
21a moving mold, 21b fixed mold,
22 Cam holder,
23 Cam slider,
24 side plates,
25 Upper plate,
26 Cam driver,
27 Return spring,
28 Fall prevention means,
29 safety pin, 29a buttocks,
30 volts,
31 Hanger retainer, 31a Buttocks.

Claims (2)

A cam slider equipped with a machining tool is suspended by a suspension means of a cam holder fixed to a movable mold and supported so as to be movable in the machining direction, and is also positioned below a cam driver fixed to the fixed mold. In the suspension cam device where the slider surface abuts and moves in the processing direction,
In addition to the suspension means, the cam holder is loosely fitted in a through hole provided along the machining direction at the upper part of the cam slider, and at the front and rear along the machining direction at the upper part of the cam slider. There is provided a rod-like drop prevention means that is fixed to one side wall of the both side walls of the cam holder that has a gap and is cantilevered,
A suspension cam device characterized by. The other side wall of the side wall of the cam holder is provided with a recess into which the tip of the rod-like fall prevention means is inserted and loosely fitted;
The suspension cam device according to claim 1.

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