JPS6312695B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic mold attaching/detaching device for a folding machine, such as a folding machine, which attaches and detaches a mold.

Conventionally, when bending a plate material to form a box-shaped product, it is necessary to adjust and replace an upper die (mold) to fit the long sides of the box-shaped product. This upper mold has many different dimensions, weight changes, and there are problems such as misalignment when installing the upper mold, and adjustment of the gap between the upper mold and the fixed part, so replacing the upper mold is automated. It was extremely difficult to do so. Therefore, since the upper die was replaced manually, the replacement work took a long time and required sufficient care and effort.

This invention effectively solves the problems in the prior art, and aims to be an automatic method for use in bending machines that facilitates the replacement, insertion, and fixing of molds and ensures alignment. The present invention provides a mold attachment/detachment device.

Hereinafter, preferred embodiments of the present invention will be described based on the accompanying drawings.

FIG. 1 shows a schematic explanatory diagram of an automatic mold attachment/detachment device in a bending machine. An upper die 9 is fixed to the lower surface of an upper die holder 7 attached to a ram 3 which is movably provided above the lower die 5 of the bending machine 1. The frame body (X-axis carriage) 13 of the automatic mold attachment/detachment device 11 is movable in the direction of the arrow P or Q by an X-axis control servo motor (not shown). To attach the upper die 9 to the upper die holder 7, the upper die 9 housed in the upper die stock 15 is held by the X-axis carriage 13 and moved in the direction R by the Z-axis carriage (not shown). Furthermore, the Y-axis carriage 13 (not shown) is moved in the left and right directions perpendicular to the plane of the paper to position the folding machine 1 at the upper mold insertion position, and then the X-axis carriage 13 is moved in the direction of the arrow P to fold the folding machine 1. After inserting the upper mold 9 into the upper mold holder 7 of the machine 1 and mounting the upper mold 9, the X-axis carriage 13 is moved in the direction of the arrow Q and returned to its original position. Upper mold 9
To remove the mold from the upper die holder 7, move the X-axis carriage 13 in the direction of the arrow P to hold the upper die 9, and then move it in the direction of the arrow Q to remove it.
Furthermore, the Z-axis carriage 13 moves upward in the direction of the arrow S, and then the X-axis carriage 13 moves in the direction of the arrow P.
, and move the upper mold stock 1 using the Y-axis carriage.
After positioning 5 to the upper mold insertion position, insert the upper mold 9
is attached to the upper die stock 15.

Next, FIG. 2 shows a schematic structural diagram of the X-axis carriage. At the lower part of 7, there is provided an upper mold locking part 19 that projects in a U-shape. The upper mold 9 located at the lower part of the upper mold holder 7 has a protrusion 21 that engages with the upper mold locking part 19, and the central part of the upper mold 9 has an attachment/detachment hole that penetrates in the directions of arrows P and Q. 23, a guide hole 25 is provided. The L-shaped lever 27 is provided on the upper mold holder 7, one end engages with the flange 29 of the upper mold 9 to fix the upper mold 9 to the upper mold holder 7, and the other end is connected to the shaft 32 via a shaft 31. It is connected to a cylinder 33 that is pivotally supported by the upper mold holder 7. Due to this extension of the cylinder 33, the L-shaped lever 27 rotates about the rotation shaft 35 and releases the engagement with the flange 29. In addition, the L-shaped lever 27 and the cylinder 33
are provided on both sides of the upper mold holder 7,
When operating pressure is not supplied, the upper mold 9 is always engaged with the flange 29 as shown in the figure, and the upper mold 9 is fixed together with the upper mold locking part 19 and the protrusion 21. The upper mold holder 7 is rotated by a rotation shaft 17, but is similarly fixed by an L-shaped lever (not shown) of the ram 3 shown in FIG. There is an X on the front of the upper mold 9.
A shaft carriage 13 is provided so as to be movable in the direction of the arrow P or Q. This X-axis carriage 13 has a U-shaped cross section, and a rectangular support 37 is fixed to the inside thereof, and this support 37 is moved in the directions of the arrows P and Q.
A cylindrical body 39 is slidably held in the hole passing through the cylindrical body 39 . An elongated hole (not shown) is formed near the tip of the cylindrical body 39 and extends vertically, and the cylindrical body 39 is rotatably supported in the elongated hole by a shaft 41 provided at the tip. Upper die locking upper claw 4
3. A lower claw 45 for locking the upper die is provided, and the ammunition 47
is always biased in the closing direction. Further, the other end of the cylindrical body 39 has a threaded portion 51 into which a nut 49 is screwed, and the extension plate 53 is fixed by the nut 49, so that the cylindrical body 39 and the extension plate 53 are integrally constituted. This extension plate 53 is prevented from rotating by a pin 55 fixed to the support body 37. Note that a cylinder 57 is fixed to the extension plate 53, and a piston 59 is fixed to the extension plate 53.
is an operating rod 61 that is slidable inside the cylindrical body 39;
and is pivotally supported by a pin 63. Further, a dog 65 is screwed to the other end of the piston 59, and a stopper 67 is screwed and fixed with a nut or the like. A detector 69 that engages with the dog 65 to detect the forward end of the operating rod 61 and a detector 71 that detects the backward end are provided at the end of the extension plate 53. Furthermore, an X-axis carriage 1 is provided at the top of the cylinder 57.
A dog 7 that can be freely engaged and detached from a detector 73 fixed to 3.
5 is fixed.

A collar 77 is provided on the outer periphery of the cylindrical body 39,
A bullet 79 is provided between the support 37 and the collar 77. When the cylindrical body 39 is not inserted into the upper mold 9, the collar 77 is moved by the bullet 79 into the cylindrical body 3.
Pressure is applied to the stepped portion 81 of 9 to maintain the cylindrical body 39 in the direction of the arrow P at all times. Furthermore, a dog 85 is provided on the upper part of the collar 77 and is detachable from a detector 83 provided at the end of the support body 37. Note that a stopper bar 87 is attached below the support body 37 with a bolt or the like.
It is fixed to a support body 37 and provided with a cylindrical body 39 protruding in parallel.

In order to replace the upper die 9 in the above configuration, the ram 3 is lowered and the lower die 5 is replaced without inserting the plate material.
After aligning and pressing the upper die 9 with the upper die 9 and confirming the parallel state of the upper die 9 and the upper die holder 7, the upper die holder 7 is fixed to the ram 3, and the ram 3 is raised and stopped at the exchange position. Until this state, the upper mold 9 is always held in the upper mold holder 7 by the L-shaped lever 27 formed by the cylinder 33 and the upper mold locking part 19. The X-axis carriage 13 is moved in the direction of the arrow P by a moving means (not shown), and the cylindrical body 39 and the rotation rod 87 are inserted into the upper mold 9. At this time, the piston 59 of the cylinder 57 is in the position shown in the figure.
The action rod 61 is in a retracted state. When the collar 77 comes into contact with the front surface of the upper mold 9 and the X-axis carriage 13 moves further, the dog 85 of the collar 77 comes into contact with the detector 83 provided on the support 37, and the movement to the X-axis carriage 13 is stopped. Send a signal and stop moving. After this movement is stopped, the movement of the piston 59 of the cylinder 57 causes the action rod 61 to move in the direction of the arrow P via the pin 63, and the upper mold locking upper claw 43 provided inside the cylindrical body 39 and the upper The lower mold locking pawl 45 is pushed open against the bullet 47. The L-shaped lever 27 is activated by the operation of a cylinder 33 attached to the upper mold holder 7 via a shaft 32.
Rotate clockwise to open the flange 29,
This allows the upper die 9 to be removed. At this time, the upper mold 9 is pushed open together with the collar 77 by the pressing force of the bullet 79, and the upper mold locking claws 43, 45 are pushed open.
The upper die 9 is held in place by engagement with the groove 82 of the upper mold 9. This clamped upper die 9 is moved to the X-axis carriage 1
3 in the arrow direction Q, it moves in the arrow direction Q together with the cylindrical body 39. Note that the X-axis carriage 13 moves to the upper mold stock 15 shown in FIG. 1, and the upper mold 9 is inserted into the upper mold stock 15. After insertion, when the piston 59 of the cylinder 57 is retracted, the action rod 61 is retracted, and the upper mold locking upper pawl 43 and the upper mold locking lower pawl 45 are closed. Therefore, the cylindrical body 39 and the rotation rod 87 are removed from the upper die 9 together with the X-axis carriage 13, and the X-axis carriage 13 holds another upper die 9 to be replaced from the upper die stock 15.

Similarly to the above, X holding the upper mold 9 to be replaced
The shaft carriage 13 moves so as to insert the protrusion 21 of the upper mold 9 into the upper mold locking part 19 of the upper mold holder 7, and further the X-axis carriage 13 moves in the direction of the arrow P.
When the collar 77 moves to the position, the dog 75 of the collar 77 comes into contact with the detector 83, stopping the movement of the X-axis carriage 13, and the cylinder 33 is activated to open the L-shaped lever 27.
As a result, the upper mold 9 is fixed to the upper mold holder 7.
Thereafter, the operating rod 61 is retracted to release the upper die 9 from the locked state, and the X-axis carriage 13 moves in the direction of the arrow Q.

Note that since the weight of the upper mold 9 to be replaced changes each time, the positions of the cylindrical body 39 and the rotation rod 87 may be misaligned with the insertion hole of the upper mold 9, and the cylindrical body 3
9 and the rotation rod 87 may not be able to be inserted into the upper mold 9. At this time, the cylindrical body 39 moves in the direction of the arrow Q, and the dog 75 on the cylinder 57
comes into contact with the detector 73, and the X-axis carriage 13
is configured to stop moving.

Next, FIG. 3 is a schematic structural diagram of the X-axis carriage with an alignment mechanism, and FIG. 4 is a sectional view taken along the line A-A in FIG. A support 93 is provided within the opening. This support body 93 is moved back and forth and up and down by bearing plates 97 and 99 that engage through a plurality of bearings 95 (four in this embodiment) in each of the arrow directions P and Q in which the X-axis carriage 91 moves. freely supported. Further, the support body 93 is provided with a cylindrical body 101 that penetrates in the moving directions P and Q of the X-axis carriage 91. This cylindrical body 101 passes through the support body 93 in the vertical direction as shown in FIG.
It is held between support rods 103 and 105 that come into contact with 01. The support rod 103 has the upper end of the ammunition 10 provided between it and an adjustment screw 107 that is screwed into the support body 93.
9 constantly presses the cylindrical body 101 downward. A spherical seat 111 is provided upwardly on the top of the adjustment screw 107, and a concave spherical pin 113 that smoothly engages with the spherical seat 111 is provided. This pin 113 is inserted through a cushion part 117 provided at the lower part of the press plate 115, and the press plate 115 is slidably supported by a cylindrical screw 119 that is screwed into the X-axis carriage 91, and It is constantly pressed downward by a bullet 123 loaded between it and an adjustment screw 121 screwed into the upper part. Note that similar support mechanisms 169 are also provided on both left and right sides of the support body 93 shown in FIG. A loaded ammunition 127 is inserted between the support rod 105 and an adjustment screw 125 screwed into the support body 93.
As a result, it is constantly pressed upward and supports the cylindrical body 101. In addition, the adjustment screw 125 has an adjustment screw 1.
Similar to 07, a spherical seat 129 and a pin 131 are provided, a piston 133 that holds the pin 131 is provided below the pin 131, and a cushion portion 135 is provided between the piston 133 and the pin 131. . Note that this piston 133 is connected to a cylinder 137 fixed to the lower part of the X-axis carriage 91.
The inside can be slid freely. A locking piece 139 screwed onto the lower end of the cylinder 137 restricts the upward position of the piston 133. When the cylindrical body 101 moves upward, the bullet 109 contracts and the bullet 127 expands, and when the cylinder 101 moves further upward, the cylinder 1
37 pistons 133 move upward, the press plate 115 compresses the bullet 123, and the support body 93 moves upward. When the cylindrical body 101 moves downward, the pressure in the pressure chamber 141 of the cylinder 137 increases, so the pressure is released by a pressure regulating valve (not shown), the piston 133 is moved downward, and the support body 93 is moved downward. Move to. The cylindrical body 101 is slidably supported in the direction Q of the arrow by a bearing 145 provided inside a support portion 143 that extends the support body 93 in the direction Q of the arrow. This bearing 145 is formed into a spherical shape, allows centering to run out when the cylindrical body 101 moves, and is constantly pressed in the direction of the arrow P by the bullets 147 and 149. Note that the cylindrical body 10
1, an extension plate 53 is screwed and fixed with a nut or the like, and is guided in the arrow directions P and Q by a guide plate 153 provided on the upper part of the support part 143. When replacing the upper mold 9, if an impact is applied to the tip of the cylindrical body 101 and the cylindrical body 101 moves more than the necessary limit in the direction of the arrow Q, the detector 155 provided on the extension plate 53 will act as a guide plate. Away from 153, X
The movement of the shaft carriage 91 is stopped. moreover,
A cylinder 57 is provided at the lower end of the extension plate 53,
The piston 59 is integrally connected to an operating rod 61 and a pin 63 that pass through the inside of the cylindrical body 101. A dog 65 that engages with a detector 71 provided on the extension plate 53 is screwed into the end of the piston 59 .

At the tip of the cylindrical body 101 is a protruding rod 1 with a small outer diameter.
67 are integrally provided, and the upper claw 43 and the lower claw 4
5 is normally biased in the closing direction by an elastic force 47, and as the operating rod 61 protrudes, the upper die locking upper pawl and the lower claws 43, 45 open in the vertical direction against the elastic force 47. Further, on the outer periphery of the cylindrical body 101, a tapered collar 157 is attached by the bullet 79.
It is always urged in the direction of the arrow P. The support body 93 has
When the X-axis carriage 91 is inserted into the upper mold 9,
A semi-elliptical rotation stopper rod 159 that prevents rotation is fixed. Note that the upper mold 9 is provided with a fixing pin 163 that is always urged upward by a bullet 161, and this fixing pin 163 has a connecting rod 165 that engages with the tip of the protruding rod 167. Projecting rod 1
An elongated hole is provided into which the tip end portion 67 can be inserted and removed.

With the above configuration, the X-axis carriage 91 moves and the protruding rod 16 moves toward the upper die 9 at the upper die stock position.
7 is inserted and engages with the connecting rod 165 of the fixed pin 163 to connect the fixed pin 163 to the bullet 161.
Press down against this to release the fixation of the upper mold 9. Next, by operating the cylinder 57, the operating rod 61 is projected to open the upper mold locking upper pawl and the lower pawl 43, 45. At this time, the rotation rod 159 is inserted into the upper mold 9 so that the upper mold 9 does not rotate. Further, when the X-axis carriage 91 is moved in the direction of the arrow Q, the upper die locking upper pawl and the lower pawls 43 and 45 engage with the groove portion 82 of the upper die 9, and the upper die 9 is integrated with the cylindrical body 101. Move to. At this time, the tapered collar 157
presses the upper die 9 in the direction of the arrow P by the bullet 79,
Together with the upper mold locking upper pawl and the lower pawls 43 and 45, the upper mold 9 is held between the upper mold 9 and its taper to prevent the upper mold 9 from tilting forward or backward.

The X-axis carriage 91, which pulls out and holds the upper mold 9 from the upper mold stock 15, moves to the upper mold position of the bending machine 1 and stops. Next, by retraction of the piston 59 of the cylinder 57, the action rod 61 is retracted in the direction of the arrow Q, and the upper die locking upper pawl and lower pawl 43, 45 are closed by the bullet 47, and at the same time, the fixing pin 163 is It is pressed upward by the bullet 161 to fix the upper mold 9 to the upper mold holder 7.

The weight of the upper mold 9 to be replaced changes each time. Therefore, the upper mold 9 inserted into the upper mold holder 7 or the upper mold stock 15 may not be aligned with the upper mold holder 7 or the upper mold stock 15. At this time, the support body 93 and the support part 143 move vertically and horizontally to align the cylindrical body 101 with the upper die holder 7 or the upper die stock 15, and enable insertion. However, the cylindrical body 101
When a load is applied to the X-axis carriage 91, the detector 155 is activated to stop the movement of the X-axis carriage 91.

As described above, according to the present invention, the tip of the cylindrical body is inserted into the inside of the upper mold which is detachably provided to the upper mold holder or the upper mold stock, and the upper mold locking claw is inserted by further extending the action rod. is opened, the cylindrical body is locked to the upper mold, the upper mold is removed from the upper mold holder or the upper mold stock, and the upper mold locking pawl is closed by contracting the working rod, releasing the lock between the cylindrical body and the upper mold,
By providing automatic attachment/detachment means for attaching the upper mold to the upper mold holder or the upper mold stock, even if the upper mold dimensions differ and the upper mold weight changes,
Inserting, fixing, and replacing the upper mold is easy and reliable.

A support body is provided at the tip of the X-axis carriage so as to be swingable in vertical and horizontal directions, and a cylindrical body having one end supported by the support body and the other end protruding from the support body is inserted into the upper mold. During insertion, alignment with the upper mold holder or upper mold stock is facilitated by the movement of the support.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a schematic explanatory diagram of an automatic mold attachment/detachment device in a bending machine;
FIG. 2 is a schematic structural diagram of the X-axis carriage, FIG. 3 is a schematic structural diagram of the X-axis carriage with an alignment mechanism, and FIG. 4 is a sectional view taken along the line AA in FIG. 3. (Explanation of main symbols shown in the drawings) 7...Upper mold holder, 9...Mold, 11...Mold attaching/detaching device, 93...Support body, 101...Cylindrical body,
61...Action rod.

Claims (1)

[Claims] 1. A mold 9 that is detachable from the upper mold holder 7 and has an engaging part is provided, and a mold attachment/detachment device 11 that engages and disengages from the engaging part of the mold 9 is provided on the X-axis, Y-axis, and Z-axis. A movable carriage is provided on the shaft, and the mold attachment/detachment device 11 is supported by a support 93 provided on the carriage that can freely swing vertically and horizontally, and by the support 93 so as to be slidable in the longitudinal direction. A cylindrical body 101,
A working rod 61 is provided inside the cylindrical body 101 so as to be freely retractable, and a working rod 61 is provided at the tip of the cylindrical body 101 to expand and contract as the working rod 61 moves forward and backward.
An automatic mold attachment/detachment device for a bending machine, comprising an engaging portion and a detachable locking member.