JPH0428646Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a coil material holding device provided in an uncoiler for unwinding coil material supplied to a press machine.

[Conventional technology]

The coil material is set on the coil material mounting drum of the uncoiler, and is fed out to the blanking press machine side by rotation of this drum. The uncoiler is equipped with an arm-shaped coil material holding device that can freely swing up and down. When the coil material is set on the coil material mounting drum and the coil band is cut, the coil holding roll at the tip of this device presses the coil material holding device. By pressing the coil material by contacting the outer circumferential surface of the material,
The coil material is prevented from unraveling, and the coil material pressing roll rotates together with the drum when the coil material is fed out, so that the coil material can be fed out reliably.

Conventionally, the coil material mounting drum and the coil material holding roll were each driven by separate motors, and the control circuits of these motors controlled the number of rotations of the rolls so that coil materials with different coil diameters were set on the drum. The coil diameter was changed to correspond to the coil diameter at that time, or to correspond to the coil diameter that decreased as the coil material was fed out.

[The problem that the idea aims to solve]

According to the above-mentioned conventional technology, a motor must be prepared for each coil material mounting drum and coil material presser roll, which results in problems such as an increase in the number of parts, a complicated structure, and an increase in manufacturing costs.

The purpose of the present invention is to provide a coil material pressing device for an uncoiler that allows the coil material mounting drum and the coil material pressing roll to be driven by the same motor, thereby simplifying the structure and reducing manufacturing costs. It's there.

[Means to solve the problem]

Therefore, the coil material pressing device for an uncoiler according to the present invention is provided with a coil material pressing roll that comes into contact with the outer peripheral surface of the coil material set on the coil material mounting drum of the uncoiler, and the coil material pressing roll is attached together with the coil material mounting drum. In the coil material holding device of an uncoiler that rotates to feed out the coil material, the motor is connected to the coil material mounting drum and the coil material holding roll via a driving force transmission path extending from one motor, and the coil material holding drum is rotated to feed out the coil material. This is characterized in that a torque limiter is provided in the driving force transmission path extending to the presser roll.

[Effect]

The driving force of the one motor is transmitted to both the coil material mounting drum and the coil material pressing roll via the driving force transmission path, and these drums and rolls are driven by the same motor to unwind the coil material from the uncoiler. I do.

In addition, when coil materials with different coil diameters are set on the coil material mounting drum, or when the coil diameter of the coil material decreases as the coil material is fed out, the torque limiter adjusts the coil material relative to the rotational speed of the coil material mounting drum. The rotational speed of the presser roll is adjusted, and if the torque limiter is of a type that transmits driving force by means of frictional force, for example, this adjustment is performed by slipping the frictional member.

〔Example〕

As shown in FIGS. 2 and 3, the uncoiler 1 according to this embodiment is of a double-head type having two coil material mounting drums 2 extending in opposite directions. A coil material pressing device 3 is provided. As shown in FIG. 2, when one drum 2 is at the coil material payout position A and the coil material 4 is being fed out, the next coil material 4 is set on the other drum 2 at the opposite position B. When the coil material 4 at position A runs out,
A new coil material 4 is supplied to position A by turning the turning shaft 5 by 180 degrees.

As shown in Fig. 1, the coil material 4 at position A is unwound from the uncoiler 1, passed through the loop controller 6, the guide table 7, and the leveler feeder 8, and sent to a blanking press machine, where the coil material 4 is punched out. The blank is fed into a transfer press machine and pressed. Further, in the uncoiler 1 according to the present embodiment, the coil material mounting drum 2 rotates until the tip of the coil material 4 reaches the pinch roll 9 of the loop controller 6, and after that, the coil material 4 is rotated by the rotation of the pinch roll 9. The rollout is starting to take place.

The coil material holding device 3 has a substantially L-shaped arm 10, and a shaft 11 is fixed to the base of the arm 10. This shaft 11 is rotatably supported by the frame 12 of the uncoiler 1. is rotated by the lever 13 shown in FIG. 3 and the cylinder 14 shown in FIG. It comes into contact with the outer peripheral surface of the material 4.

As shown in Fig. 3, a motor 17 is attached to the pedestal 16 between the two coil material mounting drums 2, a worm type reducer 18 is connected to the motor 17, and the two output shafts of the reducer 18 are connected to each other. A clutch 24 is connected to one of the clutches 19 and 20 via a sprocket 21, a chain 22, and a sprocket 23.

FIG. 4 shows the specific structure of this clutch 24. A friction member 24B, which rotates together with the sprocket 23 by a pin 24A, is rotated in the axial direction by the pressure of the air supplied from the rotary joint 24C to the chamber 24D and by the spring 24E. the friction member 24
When B comes into frictional contact with the connecting member 25A coupled to the output shaft 25, the clutch 24 is turned on. Also, by adjusting the air pressure, the friction member 24B and the connecting member 25
These members 24B, by reducing the contact force with A,
If a friction slip is created between 25A,
Since the rotation transmitted from the output shaft 25 side is not transmitted beyond the clutch 24 by the worm type reducer 18, the clutch 24 acts as a brake that brakes the rotation of the output shaft 25 side.

As shown in FIG. 3, a sprocket 26 is fixed to the output shaft 25 of the clutch 24.
6 is connected to a sprocket 28 provided on the coil material mounting drum 2 via a chain 27 shown in FIG.

The path from the worm type reducer 18 to the sprocket 28 constitutes a driving force transmission path 29 for connecting the motor 17 and the coil material mounting drum 2 to rotate the drum 2.

As shown in FIG. 3, a sprocket 30 is fixed to the other 20 of the two output shafts 19 and 20 of the worm type reducer 18, and this sprocket 30 has a sixth sprocket.
An intermediate shaft 35 is connected via a chain 32 to which tension is applied by a tension sprocket 31 shown in the figure, a sprocket 33, and a torque limiter 34. The torque limiter 34 has friction members 37 and 38 movably provided on a main body 36 fixed to an intermediate shaft 35, and these friction members 37 and 38 press the sprocket 33 with the spring force of a spring 39 and press the main body. By being pressed toward the flange portion 36A side of the sprocket 36, the driving force of the sprocket 33 is generated by the friction force between the sprocket 33 and the friction members 37, 38, and the friction force between the friction member 38 and the flange portion 36A. When a rotational resistance force of a predetermined value or more is transmitted to the shaft 35 and acts on the intermediate shaft 35 side, a rotational resistance force is applied between the sprocket 33 and the friction members 37 and 38, or between the friction member 38 and the flange portion 36A. Slips are starting to occur.

The intermediate shaft 35 is rotatably provided on the frame 12, and a gear 40 is fixed to the end opposite to the end of the intermediate shaft 35 where the torque limiter 34 is provided. It meshes with freely arranged gears 41. This gear 41 includes a connecting cylinder 42 on the outer periphery of the shaft 11, and a timing pulley 4.
3, timing belt 44, timing pulley 4
5. Intermediate shaft 4 via cam type one-way clutch 46
7 are connected. The cam type one-way clutch 46 is
Rotation of an outer ring 46A fixed to the timing pulley 45 in a predetermined direction is transmitted via a cam to an inner ring 46B fixed to the intermediate shaft 47.
Rotation of 6A in the opposite direction is not transmitted.

An intermediate shaft 47 is rotatably attached to the arm 10, and a sprocket 48 and a tension sprocket 4 inside the arm 10 are attached to the intermediate shaft 47.
A roll shaft 52 is connected via a chain 50 and a sprocket 51 to which tension is applied at 9, and the coil material pressing roll 15 is provided on this roll shaft 52. In this embodiment, a pair of left and right rolls 15 are provided. There is.

From the above worm type reducer 18 to the roll shaft 52
A driving force transmission path 53 that connects the motor 17 and the coil material pressing roll 15 by a path that extends to
is configured, and the motor 1 is transmitted through this path 53.
The roll 15 is rotated by the driving force of the roller 7.

Next, we will discuss the effect.

In order to unwind the coil material 4 from the uncoiler 1 and feed the tip of the coil material 4 to the pinch roll 9 of the loop controller 6, the clutch 24 is
is turned on to drive the motor 17. Motor 1
The driving force of the motor 17 is transmitted to the coil material mounting drum 2 through the driving force transmission path 29, so that the drum 2 rotates, and the driving force of the motor 17 is transmitted to the coil material holding drum 2 through the driving force transmission path 53. Since it is transmitted to the roll 15, the roll 15 also rotates. As a result, the coil material 4 starts to be fed out, and the tip of the coil material 4 moves toward the loop controller 6 side.

In this way, in this embodiment, the coil material mounting drum 2
The coil material holding roll 15 is driven by the same motor 17, and there is no need to prepare a motor for each drum 2 and roll 15, so the structure can be simply constructed with a small number of parts, and the manufacturing cost can be reduced.

In the above, when the coil materials 4 having different coil diameters are set on the drum 2, the rotation speed of the roll 15 is set to the peripheral speed of the outermost circumference of the coil material 4 with respect to the constant rotation speed of the drum 2. However, in this embodiment, if the no-load rotational speed of the roll 15 set in the driving force transmission path 53 is set to a large rotational speed corresponding to the predicted maximum circumferential speed, When the coil material 4 is fed out, the sprocket 33 and the torque limiter 3
between the friction members 37 and 38 of No. 4, or the friction member 38
Due to the slip between the coil material 4 and the flange portion 36A, the rotational speed of the roll 15 is automatically adjusted to correspond to the circumferential speed due to the load from the coil material 4.

Such automatic adjustment of the rotation speed of the roll 15 is performed by
This process is also performed when the tip of the coil material 4 is fed out to the pinch roll 9 of the loop controller 6 and the coil diameter of the coil material 4 is reduced.

If it becomes necessary to rewind the coil material 4 to redo the work during the above-described unwinding operation of the coil material 4, the motor 17 is reversely rotated to move the coil material mounting drum 2 in the opposite direction. Rotate. At this time, the driving force of the motor 17 is applied to the coil material pressing roll 1 by the one-way clutch 46.
In other words, the roll 15 rotates idly with the reverse rotation of the coil material 4, and the problem of the unraveling of the coil material 4 that occurs when the roll 15 is forcibly rotated to unwind the coil material 4 can be solved. This can be prevented.

After the tip of the coil material 4 reaches the pinch roll 9, the drive of the motor 17 is stopped, and the coil material 4 is fed out by rotation of the pinch roll 9.
At this time, the air pressure supplied to the clutch 24 is adjusted so that the friction member 24B and the connecting member 25
The contact force with A is reduced, which causes the clutch 2 to
4 is used as a brake, and the worm type reducer 18 prevents the rotational force from the coil material mounting drum 2, which rotates naturally as the coil material 4 is fed out, from being transmitted to the motor 17, while applying friction to the rotation of the drum 2. A braking force is applied by the friction slip between the member 24B and the connecting member 25A, thereby giving back tension to the coil material 4, and preventing the coil material 4 from being bent between the uncoiler 1 and the pinch roll 9. .

In the uncoiler 1 according to the present embodiment described above, the motor 17 rotates the coil material mounting drum 2 and the coil material pressing roll 15 only until the tip of the coil material 4 reaches the pinch roll 9. The invention can also be applied to an uncoiler in which these drums and rolls are driven by a motor until all of the coil material is unwound. No mechanism is required. Further, although the uncoiler 1 of the above embodiment is a double-head type having two coil material mounting drums 2 and two coil material holding devices 3, the present invention can of course be applied to a single-head type uncoiler.

Furthermore, in the embodiment described above, the driving force transmission paths 29 and 53 connecting the motor 17, the coil material mounting drum 2, and the coil material presser roll 15 were composed of sprockets, chains, gears, etc.
This configuration is arbitrary and may be any configuration that can transmit the driving force of the motor to the drum and roll, if necessary. Further, the structure of the torque limiter is not limited to the friction type of the above embodiment, but may be of a fluid type, for example.

[Effect of idea]

According to the present invention, since both the coil material mounting drum and the coil material pressing roll can be driven by one motor, the structure can be simplified and manufacturing costs can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a front view of the uncoiler according to the embodiment, Fig. 2 is a side view thereof, Fig. 3 is a plan view thereof, Fig. 4 is a sectional view of the clutch provided in the drive transmission path, and Fig. 5 6 is a front view of a main part of the uncoiler showing a part of the driving force transmission path, and FIG. 6 is a sectional view of the coil material pressing device showing another part of the driving force transmission path. 1... Uncoiler, 2... Coil material mounting drum, 3... Coil material holding device, 4... Coil material,
6... Loop controller, 8... Leveler feeder, 10... Arm, 15... Coil material pressing roll, 17... Motor, 18... Worm type reducer, 24... Clutch, 29, 53... Driving force transmission Path, 34...Torque limiter, 46...One-way clutch.

Claims (1)

[Scope of utility model registration request] An uncoiler coil material pressing device that includes a coil material pressing roll that comes into contact with the outer peripheral surface of the coil material set on the coil material mounting drum of the uncoiler, and this coil material pressing roll rotates together with the coil material mounting drum to feed out the coil material. The motor is connected to the coil material mounting drum and the coil material pressing roll via a driving force transmission path extending from one motor, and a torque limiter is provided in the driving force transmission path extending to the coil material pressing roll. An uncoiler coil material holding device characterized by: