JP2599513Y2 - Mold fixing structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die fixing structure for locking an upper die of a press working die in a predetermined position.

[0002]

2. Description of the Related Art Conventionally, for example, when a roof of an automobile is subjected to press working, when a roof panel that needs to form a sunroof and a roof panel that does not need to form a sunroof flow along a line, a sunroof is required. 2. Description of the Related Art There has been known a mold in which the height of an upper die of a press working die for forming is made variable, and is lifted up and retracted except when it is necessary to form a sunroof. And in this type of mold, an elevating cylinder unit for adjusting the upper die up and down position, a backup cylinder unit for locking the upper die for the lowered position, and a locking cylinder for locking the upper die for the raised position. When a total of three cylinder units are provided and a sunroof needs to be formed, operate the elevating cylinder unit to set the upper die to the lowered position, and then operate the backup cylinder unit to lower the upper die. Preparing for processing by locking at that position. Then, when the work is conveyed onto the lower mold and positioned, the upper mold is pressed down for processing. Also,
If it is not necessary to form the sunroof, operate the backup cylinder unit to release the lock on the upper die, set the upper die to the raised position by the elevating cylinder unit, and then operate the lock cylinder unit to lower the upper die. Lock mechanically in that position. When the upper die is at the raised position, the processing tool does not reach the roof panel even if the upper die is pressed down.

[0003]

However, when operating three cylinder units as in the prior art, it is difficult to operate without understanding the mechanism, and furthermore, it does not operate if the procedure is wrong, and before starting the operation. There was a problem that operation could not be performed without confirming the state.

[0004]

In order to solve the above problems, the present invention provides a biasing means for biasing a holder for holding a press working tool upward, and a biasing means provided on an upper portion of the holder and horizontally by a cylinder unit. A movable body which is movable forward and backward, and between the movable body and the holder, four peripheral edges of the holder for locking the holder after pressing down the predetermined stroke.
Provided with a first cam mechanism at an elevated middle portion of the holder in order to lock the holder at least 2
A second cam mechanism was provided at the location . When the moving body is displaced to one side, the second cam mechanism is disengaged and the first cam mechanism is engaged to press the moving body , and when the moving body is moved to the other side, The first cam mechanism is disengaged and the second cam mechanism is engaged, and the press is not processed.
It was to be so that to.

[0005]

When performing the press working, the cylinder unit is operated to move the movable body to one side, and the first cam mechanism pushes down the ascending holder downward and locks it as it is. Then, in this state, the holder is pressed down for processing. When the machining is not performed, if the first cam mechanism is removed by moving the moving body to the other side by the operation of the cylinder unit, the holder is raised by the urging member, and then mechanically moved by the second cam mechanism. Lock. In this state, even if the holder is pressed down, it does not reach the work and cannot be machined.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a mold fixing structure of the present invention. 1 is a plan view of the mold fixing structure, FIG. 2 is a cross-sectional view taken along line AA of FIG. 1, and FIG. 3 is BB of FIG.
FIG. 4 is a sectional view taken along the line, FIG. 4 is a sectional view taken along the line CC of FIG.

[0007] The mold fixing structure of the present invention is applied to an upper die of a press working die for forming a sunroof on a roof panel of an automobile. As shown in FIG. It is arranged on a lower mold 2 fixed below the road.

The upper mold 1 includes a first cylinder unit 4 as an urging member attached to the bottom plate 3,
A holder 5 connected to the rod of the first cylinder unit 4 and a cutter 6 as a processing tool attached below the holder 5, and the entire upper die 1 including the bottom plate 3 descends by a predetermined stroke. Then, a hole is formed in the roof panel W positioned and mounted on the lower mold 2.

The first cylinder unit 4 is constantly pressed upward, and the holder 5 connected to the first cylinder unit 4 is constantly urged upward.

A moving body 7 in the shape of a cross-shaped frame is provided above the holder 5, and a second cylinder unit 9 is connected to one end of the moving body 7 via a connecting member 8. Have been.

The moving body 7 is horizontally slidably supported by two guide members 11 shown in FIGS. 1 and 2, and these guide members 11 and the second cylinder unit 9 Support plate 3 integrated with bottom plate 3
a.

As shown in FIG. 3, a first cam mechanism 12 and a second cam mechanism 13 are provided between the upper surface of the holder 5 and the lower surface of the movable body 7.

[0013] The first cam mechanism 12 is adapted to move the moving body 7.
The second cam mechanism 13 is for mechanically locking the ascending holder 5 by pushing down the ascending holder 5 when the ascending is advanced.

For this reason, as shown in FIG. 6 which is a perspective view of the cam mechanism, the first cam mechanism 12
Each of the cam blocks 14 attached to the three locations is adapted to be detachable from a protrusion 15 projecting upward from the periphery of the holder 5, and the lower surface of each cam block 14 has a height direction on the forward side. A tapered portion having a smaller thickness and a flat portion connected after the tapered portion are formed.

Therefore, when the moving body 7 moves forward, the tapered portion of the cam block 14 comes into contact with the projection 15, but the force of pressing the holder 5 downward by the cam action of the tapered portion is reduced by the first cylinder unit. 4 is larger than the upward biasing force. Therefore, the holder 5 is gradually pushed down as the moving body 7 advances, and is finally locked at a lower position by the flat portion on the lower surface of the cam block 14 as shown in FIG. Further, when the moving body 7 retreats, as shown in FIG. 4, the engagement between the cam block 14 and the projection 15 is released.

Next, as shown in FIG. 6, in the second cam mechanism 13, U-shaped cams 16 fixed to two positions of the moving body 7 in a suspended manner project upward from the intermediate portion of the holder 5. Hook 1
7 and can be freely disengaged from each other.
A tapered portion and a flat portion connected to the tapered portion are formed on the engaging surfaces of the hook portion 17 and the hook portion 17 respectively.

The second cam mechanism 13 is connected to the second cam mechanism 13 shown in FIG.
When the moving body 7 moves forward, the U-shaped cam 16
When the movable body 7 is retracted, the flat portion of the U-shaped cam 16 and the flat portion of the hook portion 17 are finally engaged with each other when the moving body 7 is retracted, as shown in FIG. The holder 5 at the raised position is mechanically locked.

The timing for engaging and disengaging the first cam mechanism 12 and the second cam mechanism 13 is such that when the moving body 7 moves forward, the second cam mechanism 13 is first disengaged, 1
The first cam mechanism 12 is disengaged first, and then the second cam mechanism 13 is engaged when the moving body 7 retreats.

The operation of the mold fixing structure having the above configuration will be described.

When it is necessary to form a sunroof on the roof panel W, the holder 5 is lowered and set at the processing position. That is, by moving the second cylinder unit 9 that is being retracted forward, the cam block 1 of the first cam mechanism 12 is moved.
4 contacts the protrusion 15 of the holder 5 and pushes the holder 5 downward.

Then, in the state shown in FIG.
To lock.

In this state, the roof panel W is transported,
When set on the lower mold 2, processing is performed between the lower mold 2 and the upper mold 1.

Next, when there is no need to process the sunroof, the second cylinder unit 9 is retracted. Then
First, the first cam mechanism 12 comes off, and the holder 5 is raised by the urging force of the first cylinder unit 4. Then, the second cam mechanism 13 engages and mechanically locks the position of the holder 5.

That is, the cutter 6 does not reach the roof panel W even if the upper die 1 is pressed down, so that it is not machined.

In such an operation procedure, when the holder 5 is locked at the upper side or at the lower side, only the second operation of the cylinder unit 9 is performed, so that the operation is extremely simple.

[0026]

[Effects of the Invention] As described above, the mold fixing structure of the present invention is used.
Then , just operate one cylinder unit,
The holder for holding the press tool is at two predetermined positions
Stably and firmly at press processing position or non-press processing position
Hold the press tool in the pressed state or press
Since it can be set to the non-machining state , compared to the conventional operation of three cylinder units in order,
The structure and operation are simplified, and the size of the device can be reduced .

[Brief description of the drawings]

FIG. 1 is a plan view of a mold fixing structure.

FIG. 2 is a sectional view taken along line AA of FIG. 1;

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is a diagram showing the operation.

FIG. 5 is a sectional view taken along line CC of FIG. 1;

FIG. 6 is a perspective view showing a cam mechanism.

[Explanation of symbols]

 Reference Signs List 1 Upper die 4 First cylinder unit as urging member 5 Holder 6 Cutter 7 Moving body 9 Second cylinder unit 12 First cam mechanism 13 Second cam mechanism W Roof panel

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B21D 37/14 B21D 24/00 B21D 28/24

Claims (1)

(57) [Scope of request for utility model registration] An urging means for urging a holder for holding a press working tool upward, and a moving body provided on an upper portion of the holder and movable horizontally by a cylinder unit, the moving body and the holder are provided. In the meantime, the peripheral edge 4 of the holder is
A first cam mechanism is provided at a location, and at least an intermediate portion of the holder is used to lock the raised holder.
A second cam mechanism is provided at two places, and when the moving body is moved to one side, the second cam mechanism is disengaged, the first cam mechanism is engaged, and the press working state is established . body and by engaging the second cam mechanism by solving the engagement of the first cam mechanism when moving to the other side mold is characterized in that the be so that the press unprocessed state fixed Construction.