JPH0929359A - Device for fixing metallic die - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent lowering of work efficiency in switching a position of a clamp device and that of a clamp moving and driving device by driving a positioning pin member provided in the main body block attachably to and detachably from the pin hole by an actuator. SOLUTION: In a die fixing device 10, a positioning mechanism 50 is provided which is for positioning a second block 33 in a position for selectively communicating the engaging groove 34 of the second block 33 to each of the plural engaging grooves 8, 36a; therefore, a clamp device 12 and a clamp moving/ driving device 20 are positioned highly precisely at the position corresponding to the desired engaging grooves 8, 36a. In addition, the positioning mechanism 50 is constituted of plural pin holes 51 corresponding to each of the plural engaging grooves 8, 36a, positioning pin member 52 provided in the second block 33, and air cylinder 53 provided in the second block 33; therefore, the positioning mechanism 50 may be constituted into a simple mechanical structure, preventing lowering of positioning precision even if a hard vibration is propagated to the clamp moving/driving device 20 during the operation of a press 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention enables a clamp device for fixing a die of a press machine or the like to a die fixing plate by a clamp movement driving device along an engaging groove of the die fixing plate. More specifically, the present invention relates to a mold fixing device, in particular, in addition to a movement driving means for moving a clamp device and a clamp movement driving device over a plurality of engagement grooves on a side end side of a mold fixing plate, a clamp movement driving device having a selected engagement. The present invention relates to one provided with a positioning mechanism for positioning at a position corresponding to a groove.

[0002]

2. Description of the Related Art Conventionally, a clamp device for fixing a mold of a press machine or the like to a mold fixing plate can be moved by a clamp moving drive device along an engaging groove (T groove) of the mold fixing plate. The mold fixing device is widely used. The legs of the clamp device are slidably engaged with the engagement grooves of the mold fixing plate. The clamp movement drive device includes a main body block having an engaging groove portion communicating with the engaging groove and fixed to a mold fixing plate, a vertical case extending downward or upward from the main body block, and extending from inside the case. A chain member that passes through the engaging groove portion and the engaging groove and is connected to the leg portion of the clamp device,
It is provided with a chain drive unit for driving the chain member forward and backward to move the clamp device.

The chain drive unit is of a type in which a sprocket having a U-shaped chain member is driven up and down by a fluid pressure cylinder to drive the chain member while rotating the sprocket, or a chain member There is a type in which a combined sprocket is driven to rotate by an electric motor to drive a chain member. In the chain member, a large number of link pieces having a U-shaped cross section are connected by connecting pins, small diameter idler wheels are attached to both ends of each connecting pin, and hydraulic hoses and electric signal cables can be installed inside the large number of link pieces. The clamp device can be pushed and moved or pulled and moved.

By the way, in the case of this mold fixing device, when the size of the mold is changed by exchanging the mold, it is necessary to move the clamp device to another engaging groove. The mounting position must be changed.
Therefore, in Japanese Patent Laid-Open No. 2-112832, a clamp device and a clamp movement drive device are configured to be movable along a side end surface of a mold fixing plate, and a mold fixing device that can automatically switch the position of the clamp device. Is proposed. This mold fixing device includes a guide mechanism that guides and supports a clamp movement drive device horizontally on a side end surface of a slide of a press machine, and a clamp mechanism and a clamp movement drive device in a guide direction by the guide mechanism. There is provided a moving drive means for moving and driving.

The guide mechanism includes two guide rails horizontally fixed to the lower and upper portions of the side end surface of the slide, and a guide rail fixed to the case of the clamp movement driving device and slidably engaged with the two guide rails. The engaging groove portion of the main body block of the clamp movement drive device is guided so as to move over the side end openings of the plurality of engaging grooves. The movement driving means is composed of a rack member horizontally fixed to the side end surface of the slide, a pinion on the side of the clamp movement driving device, a stepping motor for driving the pinion in the forward / reverse direction, and the like, via a rack / pinion mechanism. It is configured to move and drive.

[0006]

In the mold fixing device described in the above publication, stepping is performed when the clamp device and the clamp movement drive device are switched to positions corresponding to the engaging groove suitable for the size of the mold. Although the positioning is performed by the positioning function of the motor, the fixing mechanism for releasably fixing the clamp movement driving device is not provided at the positioned position. However, during operation of the press machine, violent vibration propagates to the clamp device and the clamp movement drive device. Therefore, even if the clamp movement drive device moves a little due to the vibration, the stepping motor may be out of step. Due to step-out, an error is likely to occur in the positioning accuracy of the stepping motor, and if the error becomes large,
At the next position switching, it becomes impossible to position at the position corresponding to the desired engagement groove, and it is necessary to move the clamp device and clamp movement drive device to the origin setting position of the end to set the origin of the stepping motor. As a result, the work efficiency of switching the positions of the clamp device and the clamp movement drive device may be significantly reduced.

On the other hand, although the clamp device and the clamp movement drive device have a considerable weight and the sliding resistance of the guide mechanism is not small, they are moved and driven by the stepping motor through the rack and pinion mechanism. The manufacturing cost of the means becomes very expensive. In particular, when a large stepping motor that can generate a strong braking force is applied, the manufacturing cost becomes more disadvantageous. An object of the present invention is to enable highly accurate positioning of a clamp device and a clamp movement driving device at a position corresponding to a desired engagement groove, and to strongly fix the clamp movement driving device at the positioned position. , Simplifying the configuration of the clamp device and the movement drive means for moving the clamp movement drive device.

[0008]

A mold fixing device according to claim 1 is a clamp device for fixing a mold to a mold fixing plate,
An engaging position where the leg of the clamp device is engaged with the engaging groove of the mold fixing plate and is movable back and forth along the engaging groove, and a non-engaging position where the leg is removed outside the side end of the engaging groove. A mold fixing device including a clamp movement driving device that moves the clamp device across the main body block having an engagement groove portion that is provided in the clamp movement driving device and can communicate with a side end opening of the engagement groove. And a guide mechanism that supports the clamp movement drive device through the main body block and guides the main body block movably along the side end openings of the plurality of engaging grooves, and the clamp movement through the main body block. A movement drive means for moving and driving the drive device in the guide direction by the guide mechanism, and a positioning mechanism for positioning the main body block at a position where the engagement groove portion of the main body block is selectively communicated with each of the plurality of engagement grooves. Then, a plurality of pin holes formed in the die fixing plate or a member fixed thereto and corresponding to a plurality of engaging grooves, respectively, a positioning pin member provided in the main body block and engageable with the pin holes, and the main body block And a positioning mechanism including an actuator for driving the positioning pin member to engage and disengage from the pin hole.

According to a second aspect of the present invention, there is provided a mold fixing device according to the first aspect of the present invention, further comprising a fixing mechanism for releasably fixing the main body block positioned by the positioning mechanism to the mold fixing plate. The mold fixing device according to claim 3 is
In the invention of claim 1 or 2, the movement driving means is a rodless air cylinder. According to a fourth aspect of the present invention, in the third aspect of the present invention, in the third aspect of the present invention, the fixing mechanism is a plurality of hydraulic cylinders provided on a mold fixing plate or a member fixed to the mold fixing plate to press and fix the main body block with a piston rod member. Therefore, a plurality of hydraulic cylinders corresponding to the plurality of engaging grooves are provided.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, a mold fixing plate 3 for fixing a fixed mold 6 (lower mold) is fixed to the upper surface of a base 2 of the press machine 1, and a movable mold 7 is fixed to the lower surface of the slide 4. A die fixing plate 5 for fixing the (upper die) is fixed. Similar to the mold fixing plate 5, the mold fixing plate 3 is formed with a plurality of engaging grooves (T grooves) having a T-shaped cross-section for engaging the legs of the clamp device in the left-right direction.
The fixed die 6 is fixed to the die fixing plate 3 by four sets of clamping devices which are mounted in the engagement grooves suitable for the size.

As shown in FIG. 2, a total of 18 engaging grooves 8 (T grooves) are formed in the front and rear of the mold fixing plate 5 in parallel with each other in the left-right direction at equal intervals. There is. The leg portion 14 of the clamp device 12 is formed to have a T-shaped cross section that slidably engages with the engagement groove 8. A pair of mold fixing devices 10 are arranged on the left and right sides of the front part of the mold fixing plate 5, and a pair of mold fixing devices 10 are arranged on the left and right sides of the rear part of the mold fixing plate 5.
One of movable molds 7 of various sizes is detachably attached to the mold fixing plate 5 by a total of four mold fixing devices 10.

Next, the mold fixing device 10 will be described. Since the four mold fixing devices 10 have the same structure, the mold fixing device 10 provided on the right side surface of the front portion of the slide 4 will be described as an example. As shown in FIGS. 1 to 5, the mold fixing device 10 includes a clamp device 12 for fixing the movable mold 7 to the mold fixing plate 5, and a leg of the clamp device 12 in the engaging groove 8 of the mold fixing plate 5. A clamp movement driving device 20 that engages the portion 14 and drives it back and forth along the engagement groove 8, and a guide mechanism 35 that supports the clamp movement driving device 20 via the second block 33 and guides it in the horizontal front-rear direction. The clamp device 12 and the clamp movement drive device 20 are connected to the guide mechanism 3
A movement drive mechanism 40 for moving and driving in the guide direction by 5,
A positioning mechanism 50 for positioning the clamp device 12 and the clamp movement drive device 20 at a position corresponding to the selected engagement groove 8, and a fixing mechanism 55 for fixing the clamp movement drive mechanism 40 to the mold fixing plate 5 so as to be able to be released. Have and.

First, the clamp device 12 will be described. As shown in FIG. 7, the clamp device 12 includes a clamp body 13 and a hydraulic cylinder 16 provided at a lower portion thereof, and the upper portion of the clamp body 13 has an engagement groove 8, an engagement groove 36 a, and an engagement groove 36 a. The leg portion 14 that can be engaged with the groove portion 34 and the guide groove 31a is provided. The hydraulic cylinder 16 includes a cylinder body 17, a piston 18, a compression spring 19 for returning, and a rod 15 fixed to the piston 18 and integrally formed in a lower portion of the clamp body 13.
5, the working chamber 17b, and the lid member 17a, the clamp body 13 is inserted into the U-shaped notch of the fixed portion 7a of the movable mold 7, and the working chamber 17b from the hydraulic port 14 via the oil passage 15a. When the hydraulic pressure is supplied to the cylinder body 17, the cylinder body 17 moves upward and the fixed portion 7a of the movable mold 7 is fixed to the mold fixing plate 5.

Next, the clamp movement driving device 20 will be described. The clamp movement drive device 20 engages the leg portion 14 of the clamp device 12 with the engagement groove 8 and moves the leg portion 14 forward and backward along the engagement groove 8, and the leg portion 14 engages with the engagement grooves 8 and 36.
The clamp device 12 is moved and driven to the non-engagement position removed to the outside of the side end of a. As shown in FIG.
The clamp movement drive device 20 includes a first block 31 and a second block 33 (these correspond to a main body block), and a case 2 of a vertical length that is erected on the first block 31.
1, an air cylinder 21 erected on the first block 31 in the case 21, a pair of sprockets 24, a chain member 25, and other configurations described later.

The first block 31 and the second block 33 are integrally connected by a plurality of bolts, and the second block 33
Is supported by being slidably engaged with a guide member 36 fixed to the right end of the mold fixing plate 5 as described later. Second
The block 33 is formed with a T-groove-like engagement groove portion 34 which communicates with the engagement grooves 8 and 36a, and the first block 31 communicates with the engagement groove portion 34 and is curved to change the direction upward by 90 degrees. A T-groove-shaped guide groove 31a is formed. In the case 21 rising from the first block 31, a pair of sprockets 24 is provided at the tip of the rod 23 of the inverted air cylinder 22 provided upright on the first block 31. The air cylinder 22 is for driving the clamp device 12 forward and backward through the sprocket 24 and the chain member 25.

The chain member 25 has a structure in which a plurality of link pieces 26 having a U-shaped cross section are connected by a plurality of connecting pins 27, and a small diameter idler ring 28 is provided at both ends of each connecting pin 27.
Only the free wheel 28 side can be bent, and the pushing force can be transmitted and the pulling force can be transmitted through the contact between the end faces of the link piece 26. Also, as shown in FIG. 6, a hydraulic hose 32 and an electric signal cable for supplying hydraulic pressure to the hydraulic cylinder 16 of the clamp device 12 are guided between the spacer 27a and the link piece 26 over the entire length of the chain member 25. A guide path 29 to be installed is formed. The hydraulic hose 3
The base end of 2 is connected to the oil passage of the first block 31, and the oil passage in the first block 31 is supplied with hydraulic pressure from a hydraulic pump 72 described later. Further, the clamp device 12 has a clampable state detector 87 for detecting a clampable state.
(See FIG. 9) is also provided, and its electric signal cable is also installed in the installation path 29 and connected to the terminal box 21b.

The base end of the chain member 25 is fixed to the cylinder body of the air cylinder 22, and rises linearly upward from the base end and engages with the pair of sprockets 24. Get off in a straight line, the first
It is introduced into the engagement groove 8 of the mold fixing plate 5 via the guide groove 31a of the block 31, the engagement groove portion 34 of the second block 33, and the T-shaped engagement groove 36a of the guide member 36, The tip portion of the chain member 25 is the leg portion 14 of the clamp device 12.
It is stuck to.

The pair of sprockets 24 are engaged with the idle wheels 28 on both sides of the chain member 25, and the air cylinder 2
When the rod 23 of No. 2 is extended, the sprocket 24 moves upward while rotating, so that the clamp device 12 is driven outward (to the right), and when the rod 23 is retracted, the sprocket 24 is moved. Since the clamp device 12 moves downward while rotating, the clamp device 12 is moved and driven in the opposite direction (to the left). The base end side straight portion 25a of the chain member 25 partially protrudes from the opening 21a of the case 21 so that the idle wheel 28 is guided by the case 21.
The straight portion 25c is guided by a pair of guide plates 30 fixed to the case 21. A detection sensor 88 for detecting the initial position of the clamp device 12 is provided below the clamp movement drive device 20.

Next, the guide mechanism 35 will be described. The guide mechanism 35 supports the clamp movement driving device 20 via the first block 31 and the second block 33, and allows both blocks 31 and 33 to move freely along the right end openings of the plurality of engagement grooves 36a. It is a guide. FIG.
As shown in FIG. 5, the guide mechanism 35 includes the second block 33 of the clamp movement driving device 20 and the guide member 36 fixed to the right end portion of the mold fixing plate 5 and is the mold fixing plate 5. The guide member 36 has substantially the same length as the front portion.

At the lower part of the guide member 36, the mold fixing plate 5
9 engaging grooves 36a communicating with the 9 engaging grooves 8
(T groove) is formed, a guide portion 37 having a T-shaped cross section is formed at the right end portion of the guide member 36, and an engaging portion with which the guide portion 37 is slidably engaged with the second block 33. Three
3a are formed. Therefore, in the state where the clamp device 12 is switched to the non-engagement position, the guide device 35 causes the clamp device 12 and the clamp movement drive device 20 to move.
Are guided movably in the front-rear direction over the nine engagement grooves 8.

The movement drive mechanism 40 will be described. The movement drive mechanism 40 is for moving the clamp device 12 and the clamp movement drive device 20 in the guide direction by the guide mechanism 35 via the first block 31 and the second block 33. As shown in FIGS. 1 to 5, the movement drive mechanism 40 mainly includes a rodless air cylinder 41 having substantially the same length as the guide member 36. The rodless air cylinder 41 is supported by a pair of support members 42 fixed to both ends of the guide member 36, and the movement driving unit 44 fixed to a piston portion (not shown) of the rodless air cylinder 41 is A plurality of bolts 45 fix the connecting member 43 fixed to the upper portion of the second block 33.

When pressurized air is supplied to the rodless air cylinder 41 to drive the movement driving unit 44 forward, the clamp device 12 and the clamp movement driving device 20 are moved forward, and the movement driving unit 44 is moved. Is driven rearward, the clamp device 12 and the clamp movement drive device 20 are moved rearwardly. Here, the clamp movement drive device 2
In order to detect the 0 position, the guide member 36 is provided with nine proximity switches 86 corresponding to the nine engagement grooves 8, respectively, and the second block 33 is provided with a detection operation that can be detected by the proximity switches 86. The plate 87 is fixed.

Next, the positioning mechanism 50 will be described. The positioning mechanism 50 includes nine engaging grooves 8, 36a.
The second block 33, that is, the clamp movement driving device 20 is positioned at a position where the engaging groove portion 34 of the second block 33 is selectively communicated with each of the above. As shown in FIGS. 1 and 5, the positioning mechanism 50 includes nine engagement grooves 8
And nine lateral pin holes 51 formed in the guide member 36 in association with the first block 31 and the second block 3
3 has a positioning pin member 52 which is releasably engaged with the pin hole 51, and an air cylinder 53 which is provided on the first block 31 and drives the positioning pin member 52 to be engaged and disengaged. The pin member 52 is a piston rod of the air cylinder 53.

Here, as shown in FIG. 3, the air cylinder 2 is provided at the rear of the case 21 of the clamp movement driving device 20.
2 and electromagnetic direction switching valves 62 and 64 connected to the air cylinder 53, respectively.
A terminal box 21b for various signal cables is provided.

Next, the fixing mechanism 55 will be described. The fixing mechanism 55 is for fixing the second block 33 positioned by the positioning mechanism 50 to the mold fixing plate 5 so that the second block 33 can be unfixed. As shown in FIGS. 3 and 4, the fixing mechanism 55 includes ten small hydraulic cylinders 56 provided on the guide member 36 and a piston rod member 57 integrated with the piston of each hydraulic cylinder 56. 36, and a piston rod member 57 that can project to the outside of the right end surface of 36. A total of ten hydraulic cylinders 56 are provided on each side of each of the engagement grooves 8 and 36a. Guide member 3
6, a common oil passage 58 for supplying hydraulic pressure to these hydraulic cylinders 56 is formed over the entire length.

After the second block 33 is positioned by the positioning mechanism 50, when hydraulic pressure is supplied from the hydraulic pump 62 to the oil passage 58, the piston rod member 5 of all the hydraulic cylinders 56.
7 is driven to project, and a pair of hydraulic cylinders 56 on both sides of the engagement grooves 8 and 36a with which the legs 14 of the clamp device 12 are engaged.
The second block 33 is pressed and fixed to the guide member 36 by the piston rod member 57, and the clamp movement drive device 20 is strongly fixed.

Next, an air / hydraulic circuit for the four mold fixing devices 10 will be described. As for the air system, as shown in FIG. 8, the air from the pressurized air supply source 60 is regulated by the regulator 65 and then supplied to the electromagnetic directional switching valve 62 through the air passage 61, and the electromagnetic directional switching valve 62 causes the air cylinder 22 to move. Are supplied to and discharged from the two working chambers. Air passage 61
The air is also supplied to the electromagnetic direction switching valve 64, and is supplied and discharged from the magnetic direction switching valve 64 to the two working chambers of the air cylinder 53 of the positioning mechanism 50. Further, the air in the air passage 61 is supplied to the electromagnetic direction switching valve 67 via the air passage 66, and is supplied to and discharged from the two operation chambers of the rodless air cylinder 41 from the electromagnetic direction switching valve 67.

An electromagnetic directional valve 68 for switching the moving speed is connected to the exhaust port of the electromagnetic directional switching valve 67, and the discharge speed of the air discharged from one working chamber of the rodless air cylinder 41 is high or low. Can be switched to. That is, when the electromagnetic directional valve 68 is at the position shown in the figure, the discharge is performed without passing through the aperture 68a, so that the speed is high, and when the electromagnetic directional valve 68 is switched from the position shown in the figure, the velocity is discharged because it is discharged through the aperture 68a. While moving the clamp device 12 and the clamp movement drive device 20 at high speed, the clamp device 12 and the clamp movement drive device 20 approach the intended engagement grooves 8 and 36a, and the proximity switch 86 detects and switches to low speed. Supply, and the positioning pin 52 is engaged with the pin hole 51 for positioning,
At the same time, the driving of the rodless air cylinder 41 is stopped.

Regarding the hydraulic system, the air from the air supply source 60 is regulated by the regulator 71, and the air-driven hydraulic pump 72 is used.
To the oil passage 76 having a pilot air type directional control valve 77 (this is
It is supplied to the hydraulic cylinder 16 of the clamp device 12 via a hydraulic hose 32). The pilot air of the pilot air type directional control valve 77 is supplied from the electromagnetic directional control valve 73 which receives the air after pressure adjustment. Furthermore, the hydraulic pump 7
The hydraulic pressure generated in 2 is the pilot air type directional control valve 81.
The pilot air of the pilot air type directional control valve 81 is supplied to the hydraulic cylinder 56 of the fixing mechanism 55 via the oil passage 80 having the above, and is supplied from the electromagnetic directional control valve 75 which receives the air after the pressure adjustment. The electromagnetic directional control valves 62, 64,
67, 68, 73, 75 are controlled by the control unit 85.

Next, the control system of the four sets of mold fixing devices 10 will be described. As shown in FIG. 9, the operation panel 90 and 3
Various signals from the six proximity switches 86, the four clamp device initial position detectors 88, and the four clampable state detectors 87 are supplied to the control unit 85, and the control unit 85 causes the electromagnetic directional control valve. 62, 64, 67, 6
8, 73, 75 are controlled. This control unit 85
Includes a microcomputer, and a predetermined control program for controlling the four mold fixing devices 10 is stored in advance.

Next, the operation of the mold fixing device 10 will be described. When the movable die 7 is fixed to the die fixing plate 5 on the slide 4 side, the clamp device 12 is in the non-engagement position, and the slide 4 is first moved upward and movable with the fixed die 6 combined vertically. After the mold 7 is loaded onto the mold fixing plate 3, the slide 4 is lowered to bring the mold fixing plate 5 into contact with the upper surface of the movable mold 7. Next, when the operation panel 90 is operated to input a signal designating the engagement grooves 8 for setting the four sets of the clamp devices 12, the control unit 85 causes the proximity switch 86 to be operated in each mold fixing device 10 to operate. Determined,
When the moving direction of the clamp device 12 is determined, the operation of each mold fixing device 10 is started.

First, the rodless air cylinder 41 is driven, and the clamp movement driving device 20 is moved and driven toward the selected proximity switch 86 to be actuated.
When the detection operating plate 7 provided on the second block 33 is detected by the intended proximity switch 86, the rodless air cylinder 41 is switched to the low speed, and the positioning pin member 52 is moved by the air cylinder 53 of the positioning mechanism 50. Is driven to project. Here, the detection operating plate 7 is the second block 33.
The engagement groove portion 34 is detected by the proximity switch 86 slightly before the position where the engagement groove portion 34 communicates with the intended engagement groove 8 or 36a, and the tip of the positioning pin member 52 presses the surface of the guide member 36 while clamping. The device 12 and the clamp movement drive device 20 move at low speed.

After that, the clamp movement driving device 20 slightly moves, and the positioning pin member 52 is inserted into the pin hole 51 at a position where the engagement groove portion 34 of the second block 33 communicates with the intended engagement groove 8 or 36a. Engage, the clamp movement drive device 20 is positioned, and the air in the rodless air cylinder 41 is blocked. Next, the oil passage 58 of the guide member 36
When hydraulic pressure is supplied to the hydraulic cylinder 5 of the fixing mechanism 55.
6 is driven, the piston rod member 57 projects from the hydraulic cylinder 56, and the second block 33 moves the guide member 36.
The clamp moving drive device 20 is pressed by the mold fixing plate 5
Fixed to.

After that, the clamp movement driving device 20 causes the clamp device 12 to move the leg portion 14 of the clamp device 12 into the engagement grooves 8 and 3.
6a is moved out of the non-engagement position outside the side end to the engagement position where the leg portion 14 is engaged with the engagement groove 8 of the mold fixing plate 5, and the movable die 7 is moved at the engagement position. Up to the fixed part 7a,
That is, when the clampable state detector 87 is driven forward until it is turned on, the air in the air cylinder 22 is blocked. Then, hydraulic pressure is supplied from the hydraulic pump 62 to the hydraulic cylinder 16 of the clamp device 12, and the movable die 7 is fixed to the die fixing plate 5.

As described above, in the mold fixing device 10, the second block 33 is provided in each of the plurality of engaging grooves 8 and 36a.
Since the positioning mechanism 50 for positioning the second block 33 is provided at a position where the engaging groove portion 34 of the above is selectively communicated, the clamp device 12 and the clamp movement drive device 20 correspond to the desired engaging grooves 8 and 36a. Positioning can be performed with high accuracy. Moreover, this positioning mechanism 50
Is composed of a plurality of pin holes 51 corresponding to the plurality of engaging grooves 8 and 36a, a positioning pin member 52 provided in the second block 33, and an air cylinder 53 provided in the second block 33. Therefore, the positioning mechanism 50 can be configured to have a simple mechanical structure, and the positioning accuracy does not decrease even if intense vibration is propagated to the clamp moving drive device 20 during the operation of the press machine 1.
The work efficiency of position switching does not decrease.

Further, since the second block 33, that is, the clamp movement driving device 20 is provided with the fixing mechanism 55 for fixing the clamp movement driving device 20 to the mold fixing plate 5 so as to be able to be released, the clamp movement driving device 20 is strongly positioned at the positioned position. Can be fixed to. Therefore, even if a strong vibration is propagated to the clamp movement drive device 20 during the operation of the press machine 1, the clamp movement drive device 20 does not move due to the vibration. Moreover, since the fixing mechanism 55 is mainly configured by the hydraulic cylinder 56 provided in the guide member 36, the fixing mechanism 55 can be configured with a simple structure, and the clamp movement drive device 20 can be increased in size. Also, the hydraulic supply system is simplified.

Moreover, since the movement driving mechanism 40 is constituted by the rodless air cylinder 41, it can be downsized and the manufacturing cost thereof can be reduced. Next, a modified form in which the above embodiment is partially modified will be described. 1] The clamp device 12 is merely an example,
Various other clamp devices can be applied. 2) The clamp movement driving device 20 may be configured to drive the chain member 25 via a sprocket driven by an electric motor. 3) The moving drive mechanism 40 may be configured mainly by a normal hydraulic cylinder or an air cylinder, or may be configured by a rack and pinion mechanism and an electric motor.

4] Hydraulic cylinder 56 of the fixing mechanism 55
Can be provided in the second block 33. In that case, since it is sufficient to provide only one hydraulic cylinder 56 for each mold fixing device 10, the manufacturing cost of the fixing mechanism 55 can be reduced. 5] A mold fixing device similar to the above for fixing the fixed mold 6 may be provided on the base 2 and the mold fixing plate 3 sides.

[0039]

According to the die fixing device of the first aspect, when the clamp device and the clamp movement driving device are switched to the positions corresponding to the intended engagement grooves suitable for the size of the die, the clamp movement driving device is used. Is driven to switch the clamp device to a non-engagement position in which the legs of the clamp device are out of the side ends of the engagement grooves of the mold fixing plate. Next, when the positioning pin member of the positioning mechanism is driven by the actuator to be removed from the pin hole, the clamp device and the clamp movement driving device are supported and guided by the guide mechanism, and the main body block of the clamp movement driving device has a plurality of engaging grooves. It becomes free to move along the side end opening.

Next, the movement driving means drives the clamp movement driving device to move in the guiding direction by the guide mechanism via the main body block, and moves to the position where the engaging groove portion of the main body block communicates with the desired engaging groove. To drive. The positioning mechanism positions the main body block at a position where the engagement groove portion communicates with the intended engagement groove. At this time, the actuator positions the main body block by engaging the positioning pin member with the pin hole corresponding to the desired engagement groove. In this case, for example,
The positioning pin member is driven to project slightly before the engagement groove portion of the main body block communicates with the intended engagement groove, and the positioning pin member is moved at the position where the engagement groove portion of the main body block communicates with the intended engagement groove. It suffices to engage the desired pin hole.

As described above, since the positioning mechanism for positioning the main body block is provided at the position where the engagement groove portion of the main body block is selectively communicated with each of the plurality of engagement grooves, the clamp device and the clamp movement drive device are provided. It is possible to position with high accuracy at a position corresponding to a desired engagement groove. Moreover, this positioning mechanism includes a plurality of pin holes formed in the mold fixing plate or a member fixed to the mold fixing plate, a positioning pin member provided in the main body block, and an actuator provided in the main body block. Therefore, it is advantageous in terms of durability and manufacturing cost, and the positioning accuracy does not decrease even if intense vibrations propagate during the operation of the press machine. The efficiency does not decrease.

In the mold fixing device according to the second aspect of the present invention, the same action and effect as those of the first aspect are obtained, but a fixing mechanism for fixing the main body block positioned by the positioning mechanism to the mold fixing plate so as to be able to be released from the fixing is provided. Since it is provided, the positioned main body block can be strongly fixed. As a result, even if a strong vibration is propagated to the clamp device and the clamp movement drive device during the operation of the press machine, it is possible to reliably prevent the clamp movement drive device from moving due to the vibration.

In the mold fixing device of the third aspect, the same action and effect as those of the first or second aspect are exhibited, but the movement driving means is a rodless air cylinder, so that the movement driving means is miniaturized. Therefore, the movement driving means can be manufactured at low cost.

In the mold fixing device according to the fourth aspect, the same action and effect as the third aspect are achieved, but the fixing mechanism is provided on the mold fixing plate or a member fixed thereto, and the main body block is formed by the piston rod member. Since a plurality of hydraulic cylinders for pressing and fixing the plurality of hydraulic cylinders corresponding to the plurality of engaging grooves are provided, it is possible to prevent the clamp movement drive device from increasing in size by the fixing mechanism. Is advantageous in the structure of the oil passage.

[Brief description of drawings]

FIG. 1 is a side view of a main part of a press machine including a mold fixing device according to an embodiment of the present invention.

FIG. 2 is a bottom view of a mold fixing plate and the like on a slide side of the press machine of FIG.

FIG. 3 is a side view of a main part of the mold fixing device.

FIG. 4 is a front view of a mold fixing device.

FIG. 5 is a sectional view taken along line VV of FIG. 3;

6 is an enlarged cross-sectional view taken along line VI-VI of FIG.

FIG. 7 is an enlarged cross-sectional view of essential parts of the clamp movement drive device and the clamp device.

FIG. 8 is an air / hydraulic circuit diagram of four mold fixing devices.

FIG. 9 is a block diagram of a control system of four mold fixing devices.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Press machine 5 Mold fixing plate 7 Movable type 8, 36a Engagement groove 10 Mold fixing device 12 Clamping device 14 Leg part 20 Clamp movement drive device 31 First block 33 Second block 34 Engagement groove part 35 Guide mechanism 36 Guide Member 40 Movement drive mechanism 41 Rodless air cylinder 50 Positioning mechanism 51 Pin hole 52 Positioning pin member 53 Air cylinder 55 Fixing mechanism 56 Hydraulic cylinder 57 Piston rod member

Claims (4)

[Claims] 1. A clamp device for fixing a mold to a mold fixing plate, and a member capable of moving forward and backward along the engaging groove by engaging a leg portion of the clamp device with an engaging groove of the mold fixing plate. A mold fixing device provided with a clamp moving drive device for moving and driving the clamp device between a mating position and a non-engaging position where the leg portion is removed to the outside of the side end of the engaging groove, wherein the clamp moving drive device is provided. And a main body block having an engaging groove portion that is capable of communicating with the side end openings of the engaging groove, and supporting the clamp movement drive device through the main body block, and opening the main body block to the side end openings of the plurality of engaging grooves. A guide mechanism for movably guiding along a portion, a movement drive means for driving the clamp movement drive device in the guide direction by the guide mechanism via the body block, and a body block in each of the plurality of engagement grooves. Select engagement groove Is a positioning mechanism for positioning the main body block at a position where the main body block is made to communicate with each other, and a plurality of pin holes corresponding to a plurality of engaging grooves formed in the mold fixing plate or a member fixed thereto are provided in the main body block. A mold fixing device comprising: a positioning pin member that can be engaged with the pin hole; and a positioning mechanism that includes an actuator that is provided in the main body block and that drives the positioning pin member to engage with and disengage from the pin hole. 2. The mold fixing device according to claim 1, further comprising a fixing mechanism for releasably fixing the main body block positioned by the positioning mechanism to the mold fixing plate. 3. The moving drive means comprises a rodless air cylinder.
The mold fixing device described in. 4. The plurality of hydraulic cylinders, wherein the fixing mechanism is provided on a die fixing plate or a member fixed thereto and presses and fixes the main body block by a piston rod member, and each of the plurality of hydraulic cylinders corresponds to a plurality of engaging grooves. The mold fixing device according to claim 3, further comprising a plurality of hydraulic cylinders.