JP2568398Y2 - Uncoiler - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to an uncoiler used for a press operation using a coil material. The uncoiler uses a motor for feeding and rewinding, and has functions of feeding, rewinding, preventing runaway, and loosening of the coil material. The present invention relates to control of torque acting on an uncoiler shaft of an uncoiler having the uncoiler.

[0002]

2. Description of the Related Art A coil material installed in an uncoiler in a press operation is pulled out by, for example, a leveler, and further supplied to a press by, for example, a roller feeder to be pressed. The coil is unwound or unwound by an uncoiler when the coil is replaced, but the coil material is either stopped or pulled out during the pressing operation. In the press operation, the speed of the coil material withdrawn from the uncoiler greatly changes, including the stoppage, due to the operation or stoppage of the press or the change in the speed of the press. In order to cope with such a change in the speed of the coil, there is an apparatus using a clutch, for example, disclosed in Japanese Utility Model Application Laid-Open No. 61-178740 of the present applicant. This device uses the clutch by applying fluid pressure according to the spring and the drive motor during feeding and rewinding.In order to prevent runaway when pulled out, the clutch is connected to the spring and coil material. Both of the fluid pressures are applied and used as a brake. To prevent loosening, the clutch is used as a brake by a spring.

[0003]

In the above-mentioned conventional apparatus, a brake torque is generated by applying a pressing force of pressurized air to a spring force, and a back tension is applied to the coil material. Since a large back tension cannot be applied to a thin and narrow coil material, the spring must be weak. Conversely, in the case of a coil material requiring a large back tension, when the pressing force of the pressure air is insufficient, it is necessary to replace the spring, or when the pressurized air is no longer supplied, for example, when the operation of the press machine is stopped, a brake is applied. The torque is only the pressing force of the spring, and there is a problem that if the coil material has a large thickness and width, the coil material cannot counteract the loosening force of the coil material itself.

[0004]

Means for achieving the functions of brake and back tension by means of the above-mentioned spring are separated, and the pressure air is adjusted by a regulator valve according to the plate thickness to prevent coil unwinding. The disc brake has a fixed torque according to the maximum specifications and no adjustment is required.

[0005]

[Function] When the coil material is pulled out by another device, for example, a leveler during the operation of the press machine, that is, in a normal operation, the pneumatic pressure is changed by the regulator valve according to the thickness, width, material, etc. of the coil material. Adjust the back tension. When unwinding and rewinding independently, the valve is switched by pressing the operation button, the air pressure automatically becomes high, and power is transmitted as a clutch. The above a.
Normal operation, b. Feeding of coil material; c. In the case of rewinding the coil material, the brake by the spring is released by the action of the pressure fluid, and when the supply of the pressure fluid is stopped, such as when the operation of the press machine is stopped, the coil material is held by the spring brake. Prevent the uncoiler shaft from rotating and prevent the coil material from coming loose.

[0006]

1 to 4, an embodiment of the present invention will be described. In FIG. 1, an uncoiler shaft (8) is rotatably provided on the body of the uncoiler, and a drum (9) is provided at the right end. A coil (43) is set on the drum (9), and the coil (43) is provided. A coil (43) is set on the drum (9), and the coil (43) is guided to another device such as a leveler or a leveler feeder (not shown). A coil line is formed by these uncoilers, levelers, and the like. Motor (1) with worm reducer (2)
The output shaft of the output shaft of the worm reducer (2)
(4) is provided with a clutch (5).

In FIG. 2, the worm speed reducer (2)
A disk (13) is fixed to the output shaft (4), and a body (15) is rotatably provided.
The disk (13) is lined (14). A cylinder (16) is fixed to the body (15), and a piston (17) is slidably incorporated in the cylinder (16), and the piston (17) is a pin (18).
It is stopped by. The rotary joint (19) is connected to the cylinder (16), and the cylinder (1) is connected to the rotary joint (19).
6) Guide compressed air to. The piston (17) serves to press the disc (13) through the lining (14) by the action of compressed air.

In FIG. 3, a distant piece (2
By supplying air to the two right and left cylinders (20) that sandwich the 1), the piston (23) is pushed up, compressing the spring (28), and
Pad (24) is released from (10). The air is exhausted, and the spring (28) expands, so that the pad (24) attached to the piston (23) holds the brake plate (10).

A motor equipped with a worm speed reducer (2)
A chain (6) connecting a sprocket (3) and a sprocket (7) mounted on an uncoiler shaft (8) by actuating a clutch (5) mounted on an output shaft (4) using (1) as a power source. ), The power for feeding and rewinding the coil (43) is transmitted to the uncoiler shaft (8). At this time, the solenoid valve
(35) (38) (40) is demagnetized, and the power of the motor (1) is used as a clutch at the air pressure set to a high pressure by the regulator valve (36).
(8). On the other hand, coil at the leveler (43)
When is pulled, the motor (1) is stopped,
Due to the self-locking of the worm, the clutch (5) acts as a back tension brake. At this time, the solenoid valves (35), (38) and (40) are energized, and the coil (43) rotates as a back tension brake with air pressure adjusted according to the inertia force of the plate material handled by the regulator valve (33). Prevent coasting. To change the air pressure from high pressure to low pressure, excite the solenoid valve (38), exhaust the high pressure on the clutch (5) side, and then turn off the solenoid valve.
(35) Excitation of (40) shuts off the high voltage side and supplies low pressure. When the operation of the press machine is stopped or the air supply is stopped due to a trouble, and when the air pressure drops, the pressure switch (42) detects the pressure drop, stops the line and stops the disc brake (1).
1) to hold the uncoiler shaft (8) by the force of the spring (28) to prevent the coil (43) from unraveling.

In the above description, a chain is used as the power transmission means. However, any known belt-shaped member such as a timing belt can be used. Air is used as the working fluid, but other materials such as oil are used. A known working fluid may be used.

[0011]

[Effect of the Invention] The air pressure is adjusted only by adjusting the pressure of the back tension brake, and the air pressure is automatically switched in accordance with the operation other than that, so that various kinds of coil materials can be handled, and the burden on the operator can be reduced. .

[Brief description of the drawings]

FIG. 1 is a structural view of a main part of the uncoiler of the present invention,

FIG. 2 is a detailed view of a clutch,

FIG. 3 is a detailed view of a disc brake,

Fig. 4 Air system diagram,

[Explanation of symbols]

1 is a motor, 2 is a worm reducer, 3 is a sprocket,
4 is an output shaft, 5 is a clutch, 6 is a chain, 7 is a sprocket, 8 is an uncoiler shaft, 9 is a drum, 10 is a brake plate, 11 is a brake, 12 is an end plate,
13 is a disk, 14 is a lining, 15 is a body, 1
6 is a cylinder, 17 is a piston, 18 is a pin, 19 is a rotary joint, 20 is a cylinder, 21 is a distant piece, 22 is an upper plate, 23 is a piston, 24 is a pad, 25 is a screw, 26 is a push plate, 27 is a push plate. Is the guide bush,
28 is a spring, 29 is an air source, 30 is a manual valve, 31 is an auto drain filter, 32 is a lubricator, 33 is a regulator valve, 34 is a pressure gauge,
5 is a solenoid valve, 36 is a regulator valve, 37 is a pressure gauge, 38 is a solenoid valve, 39 is a muffler, 40 is a solenoid valve, 41
Is a pressure gauge, 42 is a pressure switch, and 43 is a coil.

Claims (1)

(57) [Scope of request for utility model registration] An uncoiler for feeding a coil material to a press machine while applying a necessary back tension to the uncoiler shaft (8) connected to a drum on which the coil material is set is provided with a brake (11). A clutch (5) is provided in a power transmission mechanism between the motor (1) for rotating the shaft (8) and the uncoiler shaft (8), and the brake (11) is provided with a relatively strong spring (28). ), The brake is turned on, and the brake is turned off by air pressure. The clutch (5) has a structure in which the clutch is turned on by air pressure. The air circuit of the system is connected, and both the circuits are selectively switched, and a valve for exhausting the pressure on the high-pressure circuit side to the low-pressure circuit is provided. Only, the brake (11) is characterized in that during operation, which is connected to an air circuit for the normally-off state by the air pressure uncoiler.