JPH022496Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" The present invention relates to a press mold clamping device that is installed on the slide of a C-frame press and is used to fix a mold (upper mold) to the slide. .

``Prior Art'' Conventionally, a device for fixing a mold to a slide of a C-frame press has a large diameter and a lower part facing forward and backward from the center of the slide 1 to the front half, as shown in Fig. 3a and b. has a side hole opened on the bottom of the slide,
A movable member 2 that fits into this horizontal hole is tightened with two stud bolts 3 and nuts 4 set upright at the bottom of the hole, and is placed in a vertical hole 5 that is provided vertically centering on the abutting surface of the movable member 2 and slide 1. A shaft placed upright on the top of a mold (not shown) was inserted and clamped.

``Problems to be solved by the invention'' In the mold clamping device described above, the horizontal hole into which the moving member is inserted has a large diameter, so even if the thickness of the slide is made thick, there is a limit due to the relationship with other structures. In addition to lowering the strength, the movable member required a large amount of man-hours to fabricate using a large material, and because the fixed side was a slide, it was almost impossible to change the shaft diameter of the upper die. An object of the present invention is to eliminate these drawbacks, provide a mold clamping device that is small, does not reduce the strength of the slide, and allows for easy modification of the shaft diameter of the upper mold.

"Means and effects for solving the problem" The structure of the present invention is to counterbore a vertical hole with the required depth in the center of the lower surface of the slide of the press, fit into the rear half of this vertical hole, and insert it into the upper surface of the upper mold. Attach a fixed clamp material that has a semicircular hole that fits the vertically installed shaft, and has a semicircular hole that fits the front half of the vertical hole and faces the semicircular hole of the fixed clamp material, and abutting surface with the fixed clamp material. A movable clamp material with only a slight tightening margin removed is provided, a guide pin is set upright on the abutting surface of the fixed clamp material, a hole is provided in the movable clamp material to fit the guide pin, and the movable clamp material is connected to the movable clamp material from the front of the slide. A pull bolt that screws into the screw hole of the moving clamp material and also serves as a guide is installed in the center toward the
Push bolts were provided on both sides of the slide to press the movable clamp member toward the fixed clamp member. Therefore, after separating the movable clamp material from the fixed clamp material using the tension bolt, insert the shaft of the upper mold into the hole formed by the semicircular holes of both clamp materials, loosen the tension bolt, and press the movable clamp material. There is a feature that allows the mold to be clamped to the slide.

Embodiment FIGS. 1 and 2 show the structure of a mold clamping device according to the present invention installed on a slide 6 of a press. A vertical hole 7 having a required depth is provided in the center of the lower surface of the slide 6. In the figure, the left side is the front of the slide 6, and the rear half of the vertical hole 7 is the vertical hole 7.
A fixed clamp member 8 having a height equal to the depth is fixed to the slide 6 with three bolts 9. A movable clamp member 11 is provided that fits in the front half of the vertical hole 7, has a height equal to the depth, and has an abutting surface 10 with the fixed clamp member 8 removed by a tightening margin. Abutment surface 1 of fixed and movable clamp members 8 and 11
0 is provided with semicircular holes 12 and 13 concentrically with the vertical hole 7, respectively, to form a hole into which a shaft provided upright on the upper surface of the upper mold (not shown) is inserted.

Two guide pins 14, 14 are provided on both sides of the semicircular hole 12 of the stationary clamp member 8, and project a required length at right angles to the abutment surface 10, and these guide pins 14 are slid onto the movable clamp member 11. It has a hole that allows it to fit freely. Therefore, the movable clamp member 11 is movable within the vertical hole 7 in the longitudinal direction of the slide 6 by the amount of the tightening allowance. The slide 6 is attached to the movable clamp member 11.
A screw hole 15 facing the front and back direction of the slide 6 is provided.
Pull bolt 16 inserted into the hole in the front and back direction from the front of the
is screwed into the screw hole 15. A large diameter portion 16A is provided at the base of the pull bolt 16, and a stepped portion 17 is provided in the hole of the slide 6. Therefore, after the pull bolt 16 is screwed into the screw hole 15 and the large diameter portion 16A engages with the stepped portion 17, the movable clamp member 11 can be drawn to the front side of the vertical hole 7.

On the front surface of the slide 6, two push bolts 18, 18 are provided on both sides of the pull bolt 16, which face the movable clamp member 11 in the front-rear direction of the slide 6.
The push bolt 18 slides the threaded portion 18A at the base 6.
The shaft portion 18B at the tip is brought into contact with the notch portion 1A of the movable clamp member 11. Therefore, when the push bolt 18 is screwed in, the movable clamp member 11 is pushed toward the fixed clamp member 8, and the semicircular holes 12, 13
The shaft of the upper mold inserted between can be clamped.

"Effects of the Invention" As is clear from the above description, according to the present invention, since a fixed and movable clamp member is provided in the vertical hole on the lower surface of the slide, the vertical hole can be made smaller and a decrease in the strength of the slide can be prevented. The fixed and movable clamp members are easy to replace, and therefore the shaft diameter of the upper mold can be changed. Additionally, the fixed and movable clamp members are small and easy to manufacture, and require less material. The practical effects and benefits are great.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional right side view of the slide according to the embodiment, Fig. 2 is a partially sectional bottom view thereof, Fig. 3 shows a conventional example, a is a front view, and b is a cross section taken along line A-A of a. It is a diagram. 1 is a slide, 2 is a moving member, 3 is a stud bolt, 4 is a nut, 5 is a vertical hole, 6 is a slide, 7
is a vertical hole, 8 is a fixed clamp material, 9 is a bolt, 10
11 is a movable clamp member, 12 is a semicircular hole, 13 is a semicircular hole, 14 is a guide pin, 15 is a screw hole, 16 is a pull bolt, 17 is a step, and 18 is a push bolt.

Claims (1)

[Scope of utility model registration request] A mold clamping device installed on a slide of a C-frame press includes a vertical hole provided at the center of the lower surface of the slide and having a required depth, a fixed clamping material fitted and fixed to the rear half of the vertical hole, and a vertical hole fixed to the rear half of the vertical hole. A movable clamp member that fits the front half and is slightly movable in the front and back direction guided by a plurality of guide pins erected on the abutting surfaces of the fixed clamp member, and the movable clamp member and the fixed clamp member. A semicircular hole is provided on each abutting surface of the upper mold to form a hole for holding the shaft of the upper mold upper surface, and a pusher is provided from the entire surface of the slide toward the movable clamp member to press the movable clamp member against the fixed clamp member. A press mold clamping device characterized by comprising a bolt.