JP2002036326A - Method for controlling safety door of vertical injection machine and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for controlling a safety door by which the overall size of a machine can be reduced and the total cost of a safety device can be saved as well as a device for controlling the safety door. SOLUTION: A safety door control means 18 which enables a mechanical or a hydraulic safety device showing its start/stop action by opening or closing one 2 of the movable doors to be always activated even when the other movable door 3 is opened, is provided on a safety door. A stopper device 10 is structured of a block 4 which is fixed to one 2 of the movable doors and has a thick section part 4a formed on the top and a stopper 8 which rocks by the opening/ closing of the other movable door 3. In addition, a thick section part 8a to be engaged with the lower area of the thick section part 4a of the block 4 is provided at the tip part of the stopper 8. Thus unless the mechanical or the hydraulic safety device is activated by opening one 2 of the movable doors, the other movable door 3 cannot be opened. Further, the door 2 cannot be closed unless the other door 3 is closed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling a two-piece left / right openable safety door used in a mold clamping operation section of a mold clamping device of a vertical injection machine, and a control device therefor.

[0002]

2. Description of the Related Art FIG. 8 is a schematic structural view of a vertical injection machine, showing a state in which a single safety door is attached to a mold clamping operation section of a mold clamping device. As shown in FIG.
1, a mold clamping device 22 is disposed below the mold clamping device 22.
Is provided with an outer frame 23 of a safety door in front of the vehicle. A single movable door 24 is openably and closably mounted on the outer frame 23 at a position corresponding to the mold clamping section.
A fixed door 25 is attached to the left side of the movable door 24 in the drawing. It is relatively simple to attach a safety device to the mold clamping device 22 that is interlocked with the movable door 24, for example, operates when the movable door 24 is opened.

Further, in a vertical injection machine used for molding such as hoop molding, it is necessary to arrange devices related to the left and right sides of a mold clamping device. Very poor operability when performing. Inevitably, a two-piece left / right openable safety door as shown in FIG. 9 is inevitably required.

In this case, an outer frame 26 of a safety door is provided in front of the mold clamping device 22, and the outer frame 26
Movable door 27 on the right and movable door 2 on the left
8 are provided. In addition, on the left side of the mold clamping device 22,
A hoop supply reel 30 for the hoop material 29 and a tension device 31 are provided, and a feeder device 32 and a hoop take-up reel 33 are provided on the right side. When the right movable door 27 is opened, the safety devices (electric safety device and mechanical or hydraulic safety device) provided in the mold clamping device 22 are operated in conjunction with the movement. However, the left movable door 28 is typically provided with only an electrical safety device.

[0005]

In the case of the above-mentioned two-door left / right openable safety door, the work in the mold board performed by opening the right movable door and putting the body in the mold board is different from the electric work. High security because it is protected by a system of mechanical or hydraulic double safety devices.

[0006] However, when a part of the body reaches the mold clamping device from the left movable door, there is a possibility that the left movable door is opened to perform work in the mold board. In this case, since only the electric safety device is provided on the left movable door, it is extremely dangerous for safety if a trouble occurs in the electric safety device.

As a countermeasure, it is conceivable to attach an electric safety device and a mechanical or hydraulic safety device to each of the left and right movable doors and protect them with a double safety device. In this case, however, the entire machine becomes large. In addition, there is a problem that the price of the entire safety device is increased.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and is intended to solve the above-mentioned problem. An object of the present invention is to provide a safety door control method and a safety door control method that can reduce the price of the entire safety device.

[0009]

According to the present invention, there is provided a method for controlling a two-piece left / right opening / closing type safety door used in a mold clamping unit of a vertical injection machine according to the present invention. Alternatively, the hydraulic safety device is always operated even when the other movable door is opened.

Further, a control device for a two-piece left / right openable safety door used in a mold clamping operation part of a vertical injection machine according to the present invention is a mechanical or hydraulic type which starts and stops by opening and closing one movable door. The safety door is provided with safety door control means for keeping the safety device operating at all times even when the other movable door is opened.

As a result, the other movable door cannot be opened unless one of the movable doors is opened to operate the mechanical or hydraulic safety device. One door cannot be closed without closing the other door.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described based on embodiments with reference to the drawings.

FIG. 1 is a block diagram of a safety door control device of a vertical injection machine according to a first embodiment of the present invention.
(A) is a front view (an enlarged view of a part B in FIG. 2).
(C) is a right side view of (b). FIG. 2 shows a state where both the left and right movable doors are closed.

FIG. 2 is a general external view of a two-piece left / right openable safety door to which a control device according to the present invention is attached.

As shown in FIG. 1, a right movable door 2 is provided on an outer frame 1 of a safety door provided in front of a mold clamping device.
And a movable door 3 on the left side are provided to be openable and closable. In this embodiment, the right movable door 2 is on the side close to the mold clamping device.
The movable door 3 on the (rear side) and left side is located on the side (front side) away from the mold clamping device, and intersects at its edge.

As shown in FIG. 1, the upper outer frame 1
A frame 1a of a reverse groove type is fixed to a lower surface of the frame 1a in the longitudinal direction.

A block 4 is fixed to an upper left portion on the operation side of the right movable door 2 with bolts 5. A thick portion 4a is provided at an upper portion of the block 4 toward the operation side. The width of the block 4 in the door movement direction is a width corresponding to a minimum stroke necessary for opening the right movable door 2 and operating the mechanical or hydraulic safety device.

A bracket 6 is fixed with bolts 7 on the lower surface of the reverse groove type frame 1a fixed to the outer frame 1, near the intersection of the left and right movable doors 2, 3. A plate-like stopper 8 is provided on the operation side of the bracket 6.
Is provided so as to be rotatable around the pin 9. The stopper 6 is thin on the bracket 6 side, and has a thick portion 8a at the tip end toward the non-operation side. The stopper device 10 including the bracket 6, the stopper 8 and the pin 9 and the block 4 constitute a safety door control unit 18.

The stopper 8 is turned rightward by its own weight because the stopper 8 is long on the right side in the figure. However, as shown in FIG. Since the contact portion 8b is provided to be in contact with the lower surface of 1a, it does not rotate beyond a predetermined angle.

Next, the operation of the safety door control device will be described.

When the left movable door 3 is to be opened from the state where both the left and right movable doors 3 and 2 shown in FIG. 1 are closed, as shown in FIG. The movable door 3 on the left side cannot be opened any more because the thick portion 8a of the stopper 8 hits the thick portion 4a of the block 4.

From this state, the right movable door 2 is opened, and the block 4 is moved to the left as shown in FIG. Since the width of the block 4 is set to the minimum stroke necessary for operating the mechanical or hydraulic safety device, the block 4 needs to be moved by that amount (a predetermined amount). In this state, since the restriction on the movement of the stopper 8 by the block 4 is eliminated, the left movable door 3 can be opened. Also, since the right movable door 2 has moved by a predetermined amount, the mechanical or hydraulic safety device operates,
Safety during work in the mold board is ensured.

As described above, even if the right movable door 2 is opened and the mechanical or hydraulic safety device is operated to open the left movable door 3, the right movable door 2 can be closed in this state. Then, the function of the mechanical or hydraulic safety device is lost while the left movable door 3 is kept open. Therefore, when the left movable door 3 is opened, the right movable door 2 is opened.
Must not be closed beyond the minimum stroke for the mechanical or hydraulic safety device to operate.

In the present embodiment, when the left movable door 3 is opened, the stopper 8 is maintained in a raised state, so that the block 4 is moved to the right as shown in FIGS. 5 (a) and 5 (b). Even if it does, the right end of the thick portion 4a of the block 4 and the thick portion 8a of the stopper 8 hit and the movable door 2 on the right side cannot be closed any more. However, FIG.
As shown in (c), when the left movable door 3 is closed, the stopper 8 rotates rightward by its own weight and the contact state with the block 4 is eliminated, so that the right door 2 can be closed in this state.

Next, a second embodiment will be described.

FIG. 6 is a block diagram of a safety door control device of a vertical injection machine according to a second embodiment of the present invention, and FIG.
FIG. FIG. 6 shows a state where both the left and right movable doors are closed.

As shown in FIGS. 6 and 7, a block 11 is fixed with bolts 12 on the upper left side on the operation side of the right movable door 2. The width of the block 11 in the door movement direction is a width corresponding to a minimum stroke necessary for opening the right movable door 2 and operating the mechanical or hydraulic safety device.

A stopper device 13 is provided near the intersection of the left and right movable doors 2 and 3 in the upper outer frame. The stopper device 13 includes a guide 14 fixed to the outer frame, and a stopper 15 slidably inserted into the guide 14. Note that the guide 14 itself may be substituted by the outer frame.

The upper end of the stopper 15 has a flange 16
The flange 16 contacts the upper surface of the guide 14 and limits the amount of downward movement. A groove 17 is provided below the stopper 15 in a direction perpendicular to the direction in which the stopper 15 moves.
1 is allowed to enter and leave. The movement may be facilitated by using a roller such as a bearing at the lower end of the stopper 15. The stopper device 13 and the block 11 constitute safety door control means 19.

The positional relationship between the left movable door 3 and the stopper 15 is such that when the left movable door 3 is opened, the stopper 15
Has to be moved upward by the stroke ST1. The upper stopper side of the left movable door 3 is tapered.

Block 11 fixed to right door 2
The positional relationship between the stopper 17 and the groove 17 of the stopper 15
Are not moved upward, the block 11 can freely move in and out of the groove portion 17. However, when the stopper 15 moves by the stroke ST1, the block 11 can be wrapped by that much and the block 11 is prevented from moving.

Next, the operation of the safety door control device will be described.

When the left movable door 3 is to be opened from the state where both the left and right movable doors shown in FIG. 6 are closed, the left movable door 3 raises the stopper 15 and the stopper 15
Since the groove 17 of FIG. 3 hits the block 11, the movable door 3 on the left side cannot be opened any further.

From this state, the right movable door 2 is opened, and the block 11 is moved to the left. The width of block 11 is
Since the minimum stroke required for the mechanical or hydraulic safety device to operate is set, the block 11 needs to be moved by that amount (a predetermined amount).

When the block 11 moves by a predetermined distance and comes out of the groove 17, the stopper 15 can be moved upward by the left movable door 3, and the left movable door 3 can be opened. Further, since the right movable door 2 is moved by a predetermined amount, the mechanical or hydraulic safety device is operated, and the safety in the work inside the mold board is secured.

As described above, even when the right movable door 2 is opened and the mechanical or hydraulic safety device is operated to open the left movable door 3, the right movable door 2 can be closed in this state. Then, the function of the mechanical or hydraulic safety device is lost while the left movable door 3 is kept open. Therefore, when the left movable door 3 is opened, the right movable door 2 is opened.
Must not be closed beyond the minimum stroke for the mechanical or hydraulic safety device to operate.

In this embodiment, when the movable door 3 on the left side is opened, the stopper 15 is maintained in a raised state. In this state, even if the block 11 is moved to the right, the groove 17 of the stopper 15 is Since the block 11 and the stopper 15 have moved by the stroke ST1, the movable door 2 on the right cannot be closed any further. However, when the left movable door 3 is closed, the stopper 15 moves downward by its own weight until the flange 16 hits the guide 14.
In this state, the block 11 and the groove 17 match, so the right movable door 2 can be closed.

The relationship between the right and left movable doors in the above embodiment may be reversed. In that case, all functions need to be reversed.

[0039]

Since the present invention is constructed as described above, the mechanical or hydraulic safety device linked to one movable door is always activated when the other movable door is opened. Therefore, it is not necessary to newly provide a safety device for the other movable door, and the safety of work in the mold board can be improved. Further, the size of the entire machine and the price of the entire safety device can be reduced.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a control device for a safety door of a vertical injection machine according to a first embodiment of the present invention.

FIG. 2 is an overall external view of a two-piece left / right openable safety door attached to the safety door control device according to the present invention.

FIG. 3 is a diagram showing a contact portion of a stopper.

FIG. 4 is a diagram showing an opening operation of a left movable door.

FIG. 5 is a view showing a closing operation of a right movable door.

FIG. 6 is a configuration diagram of a safety door control device of a vertical injection machine according to a second embodiment of the present invention.

FIG. 7 is a view as viewed in the direction of arrow C in FIG. 6;

FIG. 8 is a schematic configuration diagram of a vertical injection machine, showing a state in which a single safety door is attached to a mold clamping operation section of the mold clamping device.

FIG. 9 is a schematic configuration diagram of a vertical injection machine, showing a state in which two safety doors are attached to a mold clamping operation unit of the mold clamping device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outer frame 1a Frame 2 Movable door (right side) 3 Movable door (left side) 4, 11 Block 4a, 8a Thick part 5, 7, 12 Bolt 6, Bracket 8, 15, Stopper 8b Contact part 9 Pin 10, 13, Stopper device 14 Guide 16 Flange 17 Groove 18, 19 Safety door control means

Claims (5)

[Claims] 1. A method for controlling a two-piece left / right openable safety door used in a mold clamping operation part of a vertical injection machine, wherein a mechanical or hydraulic safety door which operates in conjunction with one movable door (2). A method for controlling a safety door of a vertical injection machine, characterized in that the apparatus is always operated even when the other movable door (3) is opened. 2. A control device for a two-piece left / right openable safety door used in a mold clamping operation part of a vertical injection machine, wherein a mechanical or hydraulic type is started and stopped by opening and closing one movable door (2). A safety door control device for a vertical injection machine characterized in that safety door control means (18, 19) for keeping the safety device operating even when the other movable door (3) is opened are provided on the safety door. . 3. The safety door control means (18) comprises: a block (4) fixed to one movable door (2) and having a thick portion (4a) provided on an upper part; )
And a stopper device (10) having a stopper (8) that is rotated by opening and closing of the block (4). The control device for a safety door of a vertical injection machine according to claim 2, wherein a thick portion (8a) is provided. 4. The safety door control means (19) comprises a block (11) fixed to one movable door (2).
And a stopper device (13) having a stopper (15) that moves up and down by opening and closing the other movable door (3). The stopper (15) has a direction perpendicular to the moving direction of the stopper (15). 3. The safety door control device for a vertical injection machine according to claim 2, wherein a groove (17) through which the block (11) can enter and exit is provided. 5. The width of the block (4, 11) in the door moving direction is a width corresponding to a minimum stroke required for opening one movable door (2) and operating a mechanical or hydraulic safety device. The control device for a safety door of a vertical injection machine according to claim 3 or 4, wherein