JPS632191Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention is a multi-stage homer in which a die catcher automatically extracts a plurality of die bodies installed in a line horizontally on a die block, and a new one is inserted into the die block. This invention relates to an automatic attachment/detachment die that can be pushed in and set in a fixed position.

(Conventional technology and problems) Multi-stage homers, which are used to form metal products such as bolts, nuts, and other parts, use punches and dies to form metal products by forcefully hitting them. The dies on the side that is struck are particularly subject to severe wear and damage and require replacement each time, but the dies that are arranged in parallel inside the die block are extracted and inserted one by one. Dice replacement is extremely troublesome and requires a great deal of effort and time, leading to a decrease in work efficiency. For this reason, an automatic die changing device using a robot machine has become necessary, but since the die set in the die block has almost no protruding part from the front of the die block, it is difficult to hold and catch the die. Since the movements of robot machines are generally simple movements such as up-and-down and back-and-forth movement, it has been difficult to replace the dies by inserting and removing them to accommodate such movements.

(Technical issue) Therefore, in this invention, a die catcher lever is placed on the lower front surface of the die body, and when the die body is pulled out from the insertion hole, it engages and locks with spring pressure, and returns to the fixed position. By making the lock open when pushed in, a series of die exchanges can be performed easily and reliably in response to the vertical and longitudinal movements of the die catcher lever, from extracting the die body to releasing the catch and inserting it into the die lock insertion hole. The technical challenge is to be able to perform tasks automatically without requiring any input.

(Means for solving the problem) In order to solve the above technical problem, the present invention
The die is fitted into the die insertion hole 2 of the die block 1 so as to be removable from its front end and is fixed by a setting stop pin 4, and a die which rotates around a pivot 8 is attached to the lower front end of the die body 3. An L-shaped engaging claw 7 for a catcher is pivotally installed, and the engaging claw 7 has a hook portion 7a that engages from the outside with a die catcher lever 5 that is applied from above to the front end surface of the die.
and a rear piece 7b that protrudes rearward so as to fit into the lower cavity 11b of the die main body 3 and protrude and retract, and whose lower surface is an inclined cam surface 7c, and the rear piece 7b and the die main body 3 A spring 6 is provided between the lower part and the engaging claw 7 to bias it in the opening direction.

(Example) Preferred examples will be described below with reference to the drawings.
The die block 1 has several die fitting holes 2, . It is prevented from coming off with a stop pin 4.

The die body 3 has a cylindrical shape, and a key-shaped positioning body 9 is fixed to the lower part of the outer peripheral surface with a screw 10, and the key-shaped positioning body 9 is fitted into the key groove-shaped recess 2c of the die insertion hole 2. The tip of the positioning body 9 is formed into a forked shape from the middle and protrudes from the front end of the die, and serves as a mounting part 11 of the engaging claw 7. The engaging claw 7 has an L-shape, has a pivot 8 passing through its arm portion, and is pivotally mounted on the mounting portion 11. The engaging pawl 7 is provided with a hook portion 7a formed inward at its upper end so that the hook portion 7a is engaged with the lower end engaging recess 5a of the die catcher lever 5. The rear piece 7b of the engaging claw 7 fits into the lower cavity 11b of the die body 3, and the rear piece 7b and the die body 3
A spring 6 is compressed and interposed between the two.

(Function) Move the die catcher lever 5 to the die lock 1.
The insert is lowered from above and the lower end of the insert is inserted between the insert and the engaging claw 7 so that the insert 5b fits into the end surface of the die body 3. In this state, move the die catcher lever 5 forward (2nd to 4th
When the die body 3 is moved in the direction of arrow A in the figure, the die body 3 follows the die catcher lever 5 engaged with the engagement claw 7 and is pulled out forward when the stop pin 4 is removed and the die is free. To go. Engagement claw 7
When the rear piece 7b comes out from the bottom 2b of the die lock 1, the hook 7a and the engagement recess 5a of the die catcher lever 5 are elastically engaged. Therefore, in this state, even if the die body 3 completely comes out of the insertion hole 2 of the die block and is no longer supported by the die block, the die body 3 is held by the die catcher lever 5 and the engagement claw 7, so there is no need to worry. Do not fall. When the die body 3 that has come out is lowered onto the floor, the inclined cam surface 7c on the lower surface of the rear piece 7b of the engagement claw 7 comes into contact with the floor and is pushed up, so the engagement claw 7 compresses the spring 6. Since the die catcher lever 5 is rotated counterclockwise (in the direction of arrow B), it is disengaged from the die catcher lever 5.

When the die main body 3 is placed on the floor, the engaging pawl 7 is always open, so the die catcher lever 5 is inserted into this open part by lowering it from above, and the front part is pulled out. If you hook it up and lift it up a little, it will lock with the engaging claw 7, so if you lift it upwards, carry it to the front of the die block, and push it into the insertion hole 2, the new die body can be automatically installed into the die block by the robot machine. .

In the figure, 12 is a die guide support stand protruding from the front end surface of the die block, 13 is a punch, 14 is a moving ram, and 15 is a machine frame body.

(Effects) This invention consists of the above-mentioned structure, in which an L-shaped engagement claw for the die catcher lever is attached to the die body, and when it is pulled out from the die lock by the bias of a spring and becomes free, it is locked and pushed into the fixed position. Alternatively, the lock will be released when it touches the floor, and the die catcher lever can be easily and securely removed by lowering the die catcher lever from above, inserting it, and pushing it forward, or vice versa. It is possible to automatically extract and push in the die, allowing die replacement work to be done quickly and efficiently.The structure is simple and the operation is accurate.
There is no need to worry about breakdowns and it can be carried out at low cost.

[Brief explanation of the drawing]

Figure 1 is a plan view of a multi-stage homer implementing this invention, Figure 2 is a front view of the die block seen from the front of the die body, Figure 3 is a sectional view taken along line A-A in Figure 2, and Figure 4 is FIG. 5 is a plan view of the positioning body, and FIG. 6 is a partial front view of the die catcher lever. 1...Die block, 2...Die insertion hole, 3
... Dice body, 4 ... Stop pin for setting, 5 ...
Die catcher lever, 6... Spring, 7... Engaging pawl, 8... Pivot, 2a... Fitting opening, 2b... Bottom, 7a... Hook portion, 7b... Rear piece, 7c... Inclined cam surface.

Claims (1)

[Scope of utility model registration request] The die is fitted into the die insertion hole 2 of the tie block 1 so that it can be inserted and removed from the front end, and is fixed with a setting pin 4, and a die that rotates around a pivot 8 is attached to the lower front end of the die body 3. An L-shaped engaging claw 7 for a catcher is pivotally installed, and the engaging claw 7 has a hook portion 7 that engages from the outside with a die catcher lever 5 that is applied from above to the front end surface of the die.
a, and a rear piece 7b that protrudes rearward so as to fit into the lower cavity 11b of the die main body 3 and protrude and retract, and whose lower surface is an inclined cam surface 7c, and the rear piece 7b and the die main body 3 A die for automatic attachment and detachment, characterized in that a spring 6 is provided between the lower part of the die and the engagement claw 7 to bias the engagement claw 7 in the opening direction.