JPH0222089Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is a method for drilling or not drilling holes when continuously feeding workpieces are placed on a press machine one after another and pressed. The present invention relates to a punch retainer device for presses used for.

[Prior Art] As shown in FIG. 7, a press punch used for punching a hole in a metal plate has a shape in which a step-like base portion 9a is provided at the upper end of a columnar portion 9b.

For example, a windshield wiper may be optionally attached to the back window of an automobile. In other words, a hole for attaching a rear windshield wiper may or may not be drilled in vehicle body parts that are being produced on the same production line. In such a case, the upper die punch attached to the ram of the press may protrude by the stroke, or
It is necessary to make it retract.

In such a case, as shown in FIG.
Move forward to make the special punch 9 protrude, or move the 7th
As shown in the figure, move the cam plate 3 backward and punch the special punch 9.
is retracted by the amount of cam lift.

[Problems to be solved by the invention] Conventional special punch 9 shown in FIGS. 6 and 7
In order to facilitate protrusion and retraction by the cam plate 3, a part of the head of the special punch 9 is provided with an upwardly inclined surface 9.
It had an a. For this reason, standardized commercially available punches cannot be used, which inevitably increases costs.

This invention attempts to make a standardized commercially available punch capable of being extended or retracted by the amount of cam lift using a cam plate.

[Means for solving problems] This will be explained with reference to FIGS. 1 to 3.

In the press punch retainer device according to this invention, when the cam plate 3 moves forward, the punch 8 protrudes from the lower surface of the retainer block 1 by the amount of cam lift, and when the cam plate 3 retreats, the punch 8 moves into the retainer block 1. In a press punch retainer device configured to be retracted by the amount of cam lift, an operating rod 4 is rotatably inserted and supported by an arm piece 3b fixed to the rear end of the cam plate 3 and hanging down, and a handle 4a is fixed to the rear end of the operating rod 4. At the same time, a retaining member 4b is fixed to the front part of the operating rod 4,
Further, a threaded portion 4c is provided at the front end of the operating rod 4, and a threaded hole 1f into which the threaded portion 4c of the operating rod 4 is screwed is provided in the retainer block 1.

[Example] 1 is a retainer block, 1a is a deep lateral groove provided on the upper surface of the retainer block 1, and 1b is a deep lateral groove 1
A through hole for a punch is provided at the bottom of the groove 1a, and a hole 1c is a bottomed hole for a spring provided at the bottom of the deep horizontal groove 1a, into which a compression spring 10 is fitted. 1d is a bottomed screw hole provided at the bottom of the deep groove.

2 is a punch set block which is fitted into the deep lateral groove 1a, and 2a is a stepped hole provided in the punch set block 2, into which the base 8a of the punch 8 is press-fitted. 2b is a stepped portion of the stepped hole 2a; 2c is an upward slope provided at the rear end of the punch set block 2;
Reference numeral d denotes stepped bolt holes provided on the left and right sides of the punch set block 2, and the tip of the bolt 11 inserted into the stepped bolt hole 2d is configured to be planted in the bottomed screw hole 1d of the retainer block 1. .

1e is a shallow vertical groove provided on the upper surface of the retainer block 1, 3 is a cam plate slidably fitted into the shallow vertical groove 1e, and a downward slope 3a is provided at the front end of this cam plate.

Reference numeral 12 denotes a backing plate placed over the retainer block 1, which is fixed to the retainer block 1 with bolts 15 and covers the cam plate 3. 3b
is an arm piece that hangs down from the rear end of the cam plate 3 and attaches the bolt 3
It is fixed by c.

[Function] As shown in FIG. 2, when the cam plate 3 is retreated,
The punch 8 is raised together with the punch set block 2 by the compression spring 10, and the backing plate 12
come into contact with. In this state, the workpiece 13 is not punched.

When the handle 4a is pressed, the downwardly inclined surface 3a of the cam plate 3 comes into contact with the inclined surface 2c of the punch setting block 2, pushing down the punch setting block 2, and the punch 8 protrudes. When the tip of the threaded rod portion 4c comes into contact with the retainer block 1, turn the handle 4a so that the retaining member 4b touches the retainer block 1.
Screw the screw rod 4c into the screw hole 1f until it hits the rear wall of the screw. In this state, the workpiece 13 is punched.

[Effect of the invention] In the conventional press punch retainer device, since there is no threaded rod portion 4c and threaded hole 1f in the present invention, the cam plate 3 retreats due to the vibration generated by the impact during pressing, making it difficult to punch holes. Although there was a drawback that drilling was not performed when necessary, in the present invention, the cam plate 3 is not pulled out by the threaded rod portion 4c, so that accurate drilling can be performed.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the press punch retainer device according to the present invention, in which FIG. 1 is a vertical side view in a punching state, FIG. 2 is a vertical side view in a non-drilling state, and FIG. FIG. 3 is a partially exploded front view. 4 and 5 are side views of the press to which the punch retainer device is attached. FIG. 4 is a side view showing the punching state, and FIG. 5 is a side view showing the non-drilling state.
FIGS. 6 and 7 show an example of a conventional press punch retainer device, with FIG. 6 being a vertical side view in a punching state, and FIG. 7 being a vertical side view in a non-drilling state. 1... Retainer block, 1a... Deep lateral groove,
1b...Through hole for punch, 1c...Bottomed hole for spring,
1d...bottomed screw hole, 1e...shallow vertical groove, 1f...
Screw hole, 2...Punch set block, 2a...Stepped hole, 2b...Step, 2c...Slope, 2d...Stepped bolt hole, 3...Cam plate, 3a...Downward slope, 3b... ...Arm piece, 3c...Bolt, 4...Operation rod, 4a...Handle, 4b...Removal prevention member, 4
c...Threaded rod part, 8...Punch, 8a...Base, 8
b...Cylindrical part, 9...Punch, 9a...Upward inclined surface, 9b...Columnar part, 9c...Upward inclined surface,
10... Compression spring, 11... Bolt, 12... Bucking plate, 13... Workpiece.

Claims (1)

[Claim for Utility Model Registration] When the cam plate 3 moves forward, the punch 8 protrudes from the lower part of the retainer block 1 by the amount of cam lift,
In a press punch retainer device configured such that when the cam plate 3 retreats, the punch 8 is retracted into the retainer block 1 by the amount of cam lift, the operating rod 4 is rotated by the arm piece 3b fixed to the rear end of the cam plate 3 and hanging down. A handle 4a is fixed to the rear end of the operating rod 4, and a retaining member 4b is fixed to the front part of the operating rod 4.
A punch retainer device for a press characterized in that a threaded portion 4c is provided at the front end of the operating rod 4, and a screw hole 1f into which the threaded portion 4c of the operating rod 4 is screwed is provided in the retainer block 1.