JPS643538Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of description to which the invention pertains] The invention relates to a feed roll release mechanism. Specifically, in a feeder that feeds coil material to a press machine, a single actuator is used to control the release mechanism for threading and pressing. The present invention relates to a feed roll release mechanism capable of releasing the feed roll.

[Technical background of the invention]

At the feeder that supplies coiled material from the uncoiler to the press machine, the desired amount of coiled material is fed while being clamped by a feed roll during the press lift cycle during the operating cycle of the press machine, and the position of the coiled material is adjusted using the pilot pin of the press. In this case, it is necessary to raise the feed roll during the press lowering cycle to free the coil material.

Further, in this type of feeder, when initially installing the coil material, it is necessary to raise the feed roll to facilitate threading of the coil material.

By the way, in order to facilitate the threading of the coil material, it is desirable that the amount of rise of the feed roll at the time of initial installation is sufficiently large.On the other hand, in order to cope with high-speed operation in the pressing process, the amount of rise of the feed roll during the machine lowering cycle should be It is desirable that it be the minimum necessary.

In order to meet these conflicting demands, conventional feeders have a structure that includes an actuator for threading in addition to an actuator for releasing the feed roll during pressing, which makes the structure complex and The drawback was that the effort required for maintenance and inspection was doubled.

[Purpose of invention]

The present invention was made in view of the current situation, and the purpose is to provide a feed roll release mechanism that allows a single actuator to release the feed roll during threading and pressing. .

[Summary of the idea]

In summary, the feed roll release mechanism of the present invention includes: a first pressure chamber that generates a force using fluid pressure to move at least one of the rolls constituting the feed roll in the clamping direction; a double-acting cylinder having a second pressure chamber that generates a force capable of moving the one roll in the release direction against the force of moving the one roll in the clamping direction by means of fluid pressure; is associated with the double-acting cylinder so as to move in the clamping direction and the releasing direction in conjunction with the operation of the double-acting cylinder, and when the press machine is operating, by applying fluid pressure to the first pressure chamber, the first pressure chamber is moved. The one roll is clamped by intermittently applying fluid pressure to the second pressure chamber at a timing synchronized with the release timing of the press machine while applying a force to the roll to move in the clamping direction. The fluid pressure is released intermittently against the force, and during threading, the fluid pressure is released from the first pressure chamber to release the clamping force on the one roll, and the fluid pressure is applied to the second pressure chamber. By applying only a release force to the one roll, the release force is applied to the one roll. That is, the feed roll release mechanism of the present invention releases the second pressure chamber at a timing synchronized with the release timing of the press machine in a state where fluid pressure is applied to the first pressure chamber and clamping force is generated during operation of the press machine. By intermittently applying fluid pressure to the roll, the roll is released against the clamping force, so the amount of release at this time is relatively small, while at the time of threading, the fluid pressure is released from the first pressure chamber. Since fluid pressure is applied to the second pressure chamber when the clamping force is released, only the release force is applied to the roll, so the amount of release at this time is relatively large, so a single actuator is used. This allows the feed roll to be released during threading and pressing.

[Example of idea]

An embodiment of the present invention will be described in detail below with reference to the drawings.

Fig. 1 is a mechanical diagram in which a feed roll release mechanism, which is an embodiment of the present invention, is applied to a coil material feeding device as an example of a material feeding device. Coil material, 3
4 indicates a pinch roll, 4 indicates a loop controller, 5 indicates a leveler, 6 indicates an S-shaped lever, and 7 indicates a feeder.

First, the pinch roll 3 includes a motor 31, reduction pulleys 32a, b, power transmission belts 33a, b, a driving roll 34, a driven roll 35, and an air cylinder 3.
It is equipped with 6. During threading, the air cylinder 36 is retracted to pull up the driven roll 35, and after inserting the coil material 2 into the gap between the driving roll 34 and the driven roll 35, the air cylinder 36 is extended to move the coil material 2 between the driving roll 34 and the driven roll 35. Pressure is applied between the rolls 35. After that, when the motor 31 is rotated, the rotational force is transferred to the power transmission belt 33.
a・Deceleration pulley 32a・Power transmission belt 33b・
The power is transmitted to the driving roll 34 via the reduction pulley 32b, and the driving roll 34 rotates counterclockwise in the drawing. Accordingly, the driven roll 35 rotates clockwise in the drawing, and the coil material 2 is fed to the loop controller 4 through the gap between the driving roll 34 and the driven roll 35.

Note that the loop controller 4 serves as a buffer between the feeder 7 and the pinch roll 3. That is, the pinch roll 3 always feeds the coil material 2 to the loop controller 4 at a constant speed, while the feeder 7 feeds the coil material 2 at time intervals corresponding to the machine cycle of the press machine. Therefore, the loop controller 4 allows the coil material 2 to pass within the width of the longest feeding line 41 and the shortest feeding line 42 to prevent the coil material 2 from bending or applying more tension than necessary to the coil material 2. To prevent.

The coil material 2 that has passed through the loop controller 4 in this manner is fed to the leveler 5, and the leveler 5 smoothes the coil material 2 by removing the curling tendency of the coil material 2.

That is, the leveler 5 includes a motor 51 and a reduction pulley 52.
a, b, power transmission belts 53a, b, a driving roll 54, and a driven roll 55.
2b to the driving roll 54, the driving roll 54 rotates clockwise in the drawing and feeds the coil material 2 in the direction of the S-shaped lever 6. In the process, the coil material 2 is smoothed by passing through gaps between driven rolls 55 arranged in a staggered manner up and down.

Further, the S-shaped lever 6 also performs loop control. Specifically, the S-shaped lever 6 is rotatably supported by a shaft 61, and the coil material 2 is fed from the upper side of the roll 62 to the lower side of the roll 63 to be fed to the feeder 7. When the feeder 7 stops feeding the coil material 2 in accordance with the machine cycle of the press machine, the S-shaped lever is rotated clockwise by an air cylinder (not shown) to feed the coil material 2. In addition to extending the path, when the feeder 7 is feeding the coil material 2 in accordance with the machine cycle of the press machine, the S-shaped lever is rotated counterclockwise by an air cylinder (not shown) to feed the coil material 2 in accordance with the machine cycle of the press machine. The feed route for material 2 is shortened.

The feeder 7 feeds the coil material 2 thus fed to the press machine at time intervals synchronized with the machine cycle of the press machine.

Specifically, the feeder 7 includes a motor 71, reduction pulleys 72a, b, power transmission belts 73a, b, a driving roll 74, a driven roll 75, an auxiliary roll 76, and an air cylinder 700.
The rotational force of No. 1 is generated by the power transmission belt 73a, the reduction pulley 72a, the power transmission belt 73b, and the reduction pulley 72.
b to the driving roll 74, and the driving roll 74 rotates clockwise in the drawing. In response, the driven roll 75 rotates counterclockwise, and the coil material 2 passes through the gap between the driving roll 74 and the driven roll 75 and is fed to the press machine.

By the way, as described above, in the material feeding device of the seed press machine, it is necessary to feed a desired amount of coil material 2 during the press ascending cycle and to free the coil material 2 during the press descending cycle.

Therefore, in this embodiment, the driving roll 74 is rotated intermittently, and the driven roll 75 is raised and lowered,
By lowering the driven roll 75, the coil material 2 is compressed between the driven roll 75 and the driving roll 74, and the coil material 2 is fed by the rotational force of the motor 71 at this time. In this embodiment, the driven roll 75 is raised and lowered by an air cylinder 700.

FIG. 2 is an explanatory cross-sectional view showing an enlarged view of the feeder 7 with this air cylinder 700 as the center, and
FIG. 3 is an explanatory cross-sectional view of FIG. 2 viewed from the direction of arrow A. In these drawings, the same elements as in FIG. 1 are designated by the same reference numerals as in FIG. 1.

First, the driving roll 74, whose both ends are rotatably supported by a support 702, has its upper surface peeked through the hole 12 made in the feeding table 11. on the other hand,
The driven roll 75 is rotatably supported at both ends by a floating body 701, and the floating body 701 is supported by the supporting column 70.
Spring 703, 703 between 2,702
is supported by the transport table 11 and the upper limit stopper 7.
It floats between 04 and 704. And this floating body 7
Since the movement of 01 on the horizontal plane is regulated by the supports 702, 702, the driven roll 75 moves up and down on the same vertical plane as the driving roll 74 between the conveyance table 11 and the upper limit stoppers 704, 704. At this time, the elastic force of the springs 703, 703 is sufficient to raise the floating body 701 and the driven roll 75 to the position of the upper limit stopper 704 when no downward pressing force is applied to the floating body 701. shall be.

In this embodiment, the air cylinder 700 applies a downward pressure to the floating body 701.

This air cylinder 700 is a double-acting cylinder that moves up and down due to the differential pressure between a head chamber 705 and a rod chamber 706. A pair of auxiliary rolls 76 are placed on the left and right sides of an elevating body 708 fixed to the tip of a rod 707.
is rotatably attached to the shaft, and the auxiliary roll 76 is in contact with the driven roll 75. And rod chamber 70
The floating body 701 is raised and lowered by inhaling and exhausting air 6, and the range in which the floating body 701 is raised and lowered is adjusted by adjusting the air pressure in the head chamber 705. In order to perform such intake/exhaust control, in this embodiment, a parallel air circuit is provided between the head chamber 705 and the rod chamber 706.

FIG. 4 is a circuit diagram showing this air circuit.

In the figure, 81 is an air line, 82 is a valve, 83
is an air filter, 84a and b are regulators,
Reference numerals 85, 86, and 87 indicate electromagnetic valves, and reference numeral 88 indicates a throttle valve. The electromagnetic valve 85 switches between intake and exhaust of the head chamber 705 of the air cylinder 700, and the electromagnetic valves 86 and 87 switch between intake and exhaust of the head chamber 705 of the air cylinder 700. Switch between intake and exhaust.

Next, referring to the above matters, the release operation during threading and the release operation during pressing will be explained separately.

First, when the valve 82 is opened, air is supplied from the compressor 81 to the regulators 84a and 84b via the valve 82 and the air filter 83.
The pressure is reduced by regulators 84a and 84b and applied to solenoid valves 85 and 86, respectively.

If a subsequent press machine (not shown) is currently performing a press operation, a means for detecting the machine cycle of the press machine (specifically, it may be composed of an encoder, a limit switch, etc.) detects the machine cycle of the press machine. A signal synchronized with is sent to the coil material feeding device of this embodiment, and the coil material feeding device of this embodiment operates the solenoid valve 8 in synchronization with this signal.
6, 87 are opened and closed. Also, during operation of the press machine, the solenoid valve 85 is demagnetized, so that the head chamber 7
Air is supplied to 05 through a regulator 84a, a solenoid valve 85, and a throttle valve 88.

First, when the press machine is in the press ascending cycle, the driven roll 75 and the driving roll 74 move the coil material 2 to feed the coil material 2 to the press machine.
must be compressed. Therefore, when it is detected that the press machine has entered the press raising cycle, a control device (not shown) simultaneously demagnetizes the solenoid valves 86 and 87 (ie, puts them into the state shown in FIG. 4). Therefore, the intake port 709 of the rod chamber 706
is closed and exhaust port 710 is opened, so that the pressure in rod chamber 706 decreases.

On the other hand, the regulator 84 is located in the head chamber 705.
a. Air is supplied via the solenoid valve 85 and the throttle valve 88, and the pressure in the head chamber 705 becomes higher than the pressure in the rod chamber 706, so the rod 707 is moved to the cylinder 7.
00, and in response, the auxiliary roll 76 pushes down the driven roll 75 against the spring 703. Therefore, the coil material 2 is pinched between the driven roll 75 and the driving roll 74 and fed to the press machine.

On the other hand, it is necessary to release the driven roll 75 for the above-mentioned reason immediately before the press machine performs press processing. Therefore, when it is detected that the press machine has entered a cycle immediately before press working, a control device (not shown) simultaneously energizes the solenoid valves 86 and 87. Therefore, the intake port 709 of the rod chamber 706
is open, the exhaust port 710 is closed, and the rod chamber 70 is closed.
The pressure at 6 increases. In this embodiment, the set pressure in the rod chamber 706 is set slightly higher than the set pressure in the head chamber 705, and the rod 707 is drawn into the cylinder 700. Therefore, the auxiliary roll 7
6 also rises, the driven roll 75 is pushed up by the elastic force of the spring 703.

By the way, when the pressure in the rod chamber 706 rises and the piston 711 rises, the head chamber 70
5 will be pressurized. And head room 7
05 and the rod chamber 706 are balanced, the piston 711 stops and the driven roll 75 no longer rises, so the release amount of the driven roll 75 is regulated at that point.

Therefore, the pressures in the rod chamber 706 and head chamber 705 are set so as to obtain a release amount necessary and sufficient to raise the driven roll 75 and reduce the clamping force applied to the coil material 2 to zero. If you leave it there,
Since the release amount of the driven roll 75 is the minimum necessary, it can sufficiently follow even if the press machine operates at high speed.

By the way, the driven roll 7 obtained as above
The release amount 5 is the minimum necessary to raise the driven roll 75 and reduce the clamping force applied to the coil material 2 to 0, so the coil material 2 is placed on the feeder 7 before starting the pressing operation. The release amount for threading is insufficient.

Therefore, in this embodiment, when releasing the driven roll 75 for threading, the electromagnetic coil 85 is energized so that a larger release amount can be obtained.

First, when an operator gives an instruction from the console prior to threading, a control circuit (not shown) energizes all the solenoid valves 85, 86, and 87.

When the electromagnetic valves 86 and 87 are energized, the pressure in the rod chamber 706 increases in the same manner as described above, and the piston begins to rise. At this time, the solenoid valve 85 is also energized, so the air in the head chamber 705 is diverted to the throttle valve 88.
It is opened via a solenoid valve 85. Therefore, since the piston 711 is drawn into the cylinder 700 to its top dead center, the auxiliary roll 76 also rises to its top dead center.

Therefore, the floating body 701 is pushed up by the spring 703 until it hits the upper limit stopper 704, and the driven roll 75 is also pushed up to that position, so that a release amount sufficient for threading the coil material 2 can be obtained.

Incidentally, FIG. 5 shows another embodiment of the present invention, and the embodiment of FIG. 5 has the following features except that the solenoid valves 86 and 87 in the embodiment of FIG. The rest is the same as the example shown in FIG.

The effect when the solenoid valve 89 is demagnetized is the same as the effect when the solenoid valves 86 and 87 are simultaneously demagnetized in FIG. , 87 are simultaneously excited.

Although the above example uses an air cylinder as the actuator, the present invention can also be applied to a case where a hydraulic cylinder is used.

Moreover, although the example in which the driven roll is arranged above the driving roll is shown above, the driven roll may be arranged below the driving roll.

Further, the same effect can be obtained even if the rod 707 and the floating body 701 are directly fixed and arranged, and it goes without saying that the spring 703 is not necessary in this case.

[Effect of idea]

As explained above, according to the present invention, the feed roll is released within the minimum necessary range during pressing, so it can sufficiently follow high-speed operation, and the feed roll can be sufficiently released when the coil material is initially installed. It becomes easier to attach the coil material. However, in the present invention, the above contradictory requirements can be achieved with a single actuator, the mounting space is reduced, and subsequent maintenance management is also facilitated.

[Brief explanation of the drawing]

Fig. 1 is a mechanical diagram of the coil material feeding device, Figs. 2 and 3 are cross-sectional explanatory views of the feeder, and Figs. 4 and 5 are circuit diagrams each showing an example of the air circuit of the present invention. 7...Feeder , 74...Motive roll, 75...
...Followed roll, 700 ...Air cylinder, 70
5... Head room, 706... Rod room, 85,8
6,87... Solenoid valve.

Claims (1)

[Claims for Utility Model Registration] (a) A feeding device that feeds the material to a press machine by the rotation of the opposing rolls while pinching the material between rolls arranged oppositely, (b ) a first pressure chamber that generates a force using fluid pressure to move at least the one roll in the clamping direction; and a first pressure chamber that resists the force generated by the first pressure chamber to move the one roll in the clamping direction. a double-acting cylinder having a second pressure chamber that generates a force capable of moving the one roll in the release direction using fluid pressure, and moving at least the one roll in the clamping direction in conjunction with the operation of the double-acting cylinder. (c) an independent fluid pressure circuit is connected to each of the first pressure chamber and the second pressure chamber, and when the press machine is in operation, the press machine A fluid pressure circuit connected to the first pressure chamber includes an electromagnetically actuated first switching means that constantly applies fluid pressure to the first pressure chamber and releases fluid pressure from the first pressure chamber during threading. an electromagnetically actuated second pressure chamber which applies fluid pressure to the second pressure chamber at a timing synchronized with the release timing of the press machine when the press machine is in operation, and which constantly applies fluid pressure to the second pressure chamber during threading. 2. A feed roll release mechanism, characterized in that said switching means is provided in a fluid pressure circuit connected to said second pressure chamber.