JPS6217133Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a punch with a tensioner for press molds, and in particular, a punch with a tensioner that allows the tensioner pin to be retracted into the punch body or brought out to a predetermined position outside the blade at any time simply by pushing the tensioner pin. Regarding.

One of the most common troubles during press punching is when the slag does not fall down from the die and sticks to the punch, and as the upper die rises, it falls into the die and causes damage to the die. many. Conventionally, a hole is drilled in the punch body, a hard pin is inserted, and a spring is attached so that it protrudes from the punch's cutting edge to prevent the scraps from rising. However, when resharpening, the hard pin sticking out from the cutting edge Some kind of countermeasures are needed to prevent this from happening. Figures 1 to 3 show a conventional method for this purpose. Figure 1 shows a conventional method for this purpose, in which air (arrow) is passed through a hole 2 drilled in the punch body 1 instead of using a punching pin, and the scraps of the punched scrap 3 are lifted up. is prevented. Figure 2 shows a method of disassembling the mold and removing the kicker pin.The method involves removing the set screw 4 on the upper side of the punch body 1, taking out the spring 5 and the kicker pin 6 inside the punch body, and then polishing them. It is. FIG. 3 shows a method in which the kicker pin 6 is temporarily retracted into the punch body. After pushing the kicker pin 6, which has an upward shoulder, into the punch body sufficiently, the pin (not shown) is inserted through the small hole 7. This pin supports the shoulder of the puncher pin and prevents it from protruding from the cutting edge of the punch body during polishing. However, each of these methods has its advantages and disadvantages, and the current situation is that all of them generally still require time and effort.

This invention takes the above points into account, and allows you to retract the kicker pin into the punch body at any time by simply pushing the kicker pin in a one-touch manner without requiring much effort.
To provide a punch with a kicker for a press mold that can be delivered to a predetermined position outside the cutting edge. The punch with a tightener according to the present invention is characterized by comprising a tightener pin, a first clutch, a second clutch, a clutch body, a spring receiver, a spring, and a set screw.One embodiment of the present invention will be described in detail below with reference to the drawings. do.

In FIG. 4, which shows a punch with a kicker according to the present invention, the punch body 1, set screw 4, spring 5, and pusher pin 6 are the same as those of the conventional punch shown in FIGS. 2 and 3. The punch with a tightener of the present invention further includes a first clutch 8 whose one end abuts against the tightener pin 6, a second clutch 9 whose one end abuts against the first clutch 8, a clutch main body 10 containing the first and second clutches therein, and A spring receiver 11 is provided, one end of which contacts the second clutch 9 and the other end of which contacts the spring 5. FIG. 5 shows the structure of the first clutch 8, second clutch 9, and clutch body 10, and the structure and operation of each will be explained below.

The first clutch 8 has a hollow cylindrical shape, and its lower end abuts the kicker pin 6, and its upper end contacts the second clutch 9.
A first protrusion 12 as shown in FIG.
It is configured to move vertically along the guide groove 15 between the inner protrusions 13 without rotating. In the case of the embodiment, the number of first protrusions 12 is six, and they are guided along six guide grooves 15. Also, each first
The top portion 12a of the protrusion 12 is inclined so that its height decreases in the counterclockwise direction. The second clutch 9 has two large and small hollow cylindrical parts on the upper and lower sides, the lower cylindrical part of which fits into the cylindrical part of the first clutch 8, and the upper cylindrical part has a spring receiver 11. They fit and abut. At the lower end of the upper cylindrical part of the second clutch 9, which should come into contact with the first protrusion 12 at the upper end of the first clutch 8, there is a large cylindrical part with a knife-edge inclined tip as shown in FIGS. 5 and 6. A second protrusion 14 is provided, and is configured to abut against the first protrusion 12 within the guide groove 15 of the clutch body 10. In the case of the embodiment, the number of second protrusions 14 is equal to the number of the first protrusions 14.
These are three halves of the protrusions 12, and contact every other three protrusions of the six first protrusions 12, and are rotated counterclockwise by the inclined surfaces of the protrusions 12 and 14 in contact with the protrusions 12 and 14. It is constructed to receive strong force.
Here, the first and second clutches 8 and 9 are usually both restrained by the guide groove 15 of the clutch body 10 and move up and down without rotating. 1
3 are provided at irregular intervals, as shown in FIG. 7, and every other guide groove 15a into which the second protrusion 14 of the guide grooves 15 is fitted has large intervals that allow it to move up and down freely. , but other adjacent guide grooves 15
The interval b is set small so that only the first protrusion 12 can move up and down, and the second protrusion 14 is configured not to enter the adjacent guide groove 15b. As a result, the guide groove 1 between the inner protrusions 13
5 serves as a guide groove 15a for moving the first and second clutches, and at the same time, the second clutch side tip convex portion 13' constituting the adjacent guide groove 15b is connected to the second protrusion 14.
The second clutch 9 is configured to come into contact with the second clutch 9 and limit downward movement of the second clutch 9.

That is, every other three guide grooves 15a in which the second protrusions 14 move among the guide grooves 15 are configured to be larger than the other three guide grooves 15b, and only within these large guide grooves 15a. The large second protrusion 14 moves up and down, and the other three adjacent guide grooves 15
In b, it is configured so that it cannot move downward because it is blocked by the tip convex portion 13'. Incidentally, it is preferable that the tip convex portion 13' is provided so as to be inclined downward in a counterclockwise direction as shown in FIG.

When the components configured in this way are installed in a predetermined position as shown in FIG.
Due to this action, the first and second clutches 8, 9 are pushed downward, and the kicker pin 6 protrudes downward from the cutting edge as shown in the figure. At this time, the second clutch 9
As shown in FIGS. 6 and 7C, the second protrusion 14 is located within a large guide groove 15a and is movable up and down. Next, during polishing, the hard pin 6 is pushed inward using a suitable pin (not shown). At this time, the first and second clutches 8 and 9 move upward in the guide groove against the spring force of the spring 5, but the second protrusion 14 pushed by the first protrusion 12
Since the tip of the clutch 9 is inclined counterclockwise, it receives a strong rotational force, and the second clutch 9 rotates strongly when it exits the guide groove 15a of the inner protrusion 13 in the clutch body 10, and the second protrusion 14 It stops at the locking position shown in FIG. 7A, where the tip of the inner protrusion abuts the tip convex portion 13' of the adjacent guide groove 15b. Therefore, when the force pushing the kicker pin 6 is released, the downward movement of the second clutch 9 is prevented by the tip convex portion 13', and as a result, the pusher pin 6 is retained within the punch body 1. When the polishing is finished and you want to take out the scratcher pin 6 again, push the scratcher pin 6 inward again against the spring elasticity of the spring 5, and the first protrusion 12 will be reversed from the state shown in FIG. 7A in the same manner as described above. While applying a strong rotational force in the clockwise direction, push up the inclined surface at the tip of the second protrusion 14, and when the tip exits the guide groove 15b, strongly rotate the second clutch 9 in the counterclockwise direction, as shown in FIG. 7B. After this state, the tip of the second protrusion 14 comes to the position of the vertically movable guide groove 15a of the adjacent inner protrusion 13 (as shown in FIG. 7C).
When the pushing force is released, the second clutch 9 moves downward along the guide groove together with the first clutch 8, and as a result, the kicker pin 6 projects outward from the cutting edge of the punch body. By repeating this operation, the puncher pin 6 can be moved in and out of the punch body at any time.

As described above, according to the present invention, the puncher pin can be easily moved in and out of the punch body at any time by simply pushing the puncher pin in a one-touch manner.

[Brief explanation of the drawing]

Figures 1 to 3 are explanatory diagrams for explaining the conventional techniques, Figure 4 is a partially longitudinally sectional front view of an embodiment of the punch with a punch according to the present invention, and Figure 5 is the main part thereof. 1st clutch, 2nd clutch,
FIG. 6 is an exploded perspective view showing the structure of the clutch body, FIG. 6 is a partial vertical cross-sectional view of its main parts, and FIG.
B and C are plan views showing the configuration of the main parts according to the operating state. 1... Punch body, 2... Hole, 3... Punching scrap, 4... Set screw, 5... Spring, 6...
Kitsuka pin, 7... Small hole, 8... First clutch, 9... Second clutch, 10... Clutch body, 11... Spring receiver, 12... First protrusion,
13... Inner protrusion, 13'... Inner protrusion tip convex portion, 14... Second protrusion.

Claims (1)

[Scope of utility model claims] a locking pin; a lower end abutting the locking pin and an upper end contacting the second clutch; and a second clutch at the upper end that can be moved up and down to push the second clutch up onto the guide groove; a first clutch having one protrusion, a lower end abutting the first clutch, an upper end abutting a spring receiver, and a lower end abutting the first clutch having a guide groove in every other guide groove; The second protrusion is provided with a second protrusion that moves up and down along with the first protrusion to a position where it is removed from the upper end, contacts every other protrusion of the first protrusion with an inclined tip, and receives a rotational force in the direction of the adjacent guide groove. a second clutch, and a first clutch located on the inner surface of the first and second clutches.
A guide groove for guiding the protrusion and the second protrusion is formed, and the groove end of the guide groove adjacent to the guide groove in which the second protrusion moves forms a tip convex portion that prevents downward movement of the second protrusion. The punch includes a clutch body having a protrusion, the spring receiver, a spring that contacts the spring receiver and applies spring elasticity to the first and second clutches that contact the locking pin therebetween, and a set screw that fixes the spring. A punch with a puncher for press molds, which is equipped in the main body.