JPS6141732Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for winding a strip such as a wire or tape in a spiral manner with a constant tension around a moving tube or rod-shaped body with or without rotation.

Conventionally, this type of winding device rotates a cylindrical body in the circumferential direction on the outside of a moving tube body, etc. approximately coaxially with this body, and a drum with a strip wound and housed in this cylindrical body is connected to the cylindrical body. is attached to rotate independently via a bearing, a disk is fixed to the cylinder in front of it, and the strip is guided by an appropriate number of rolls held by the disk to advance inside the cylinder. It was designed to wind the strips of the tube body, etc.

In this conventional strip winding device, a torque motor was used to control the rotation of the drum to maintain a constant tension when the strip was wound onto a pipe body, etc. The tension when unwinding (feeding out) is simulated as the tension when actually winding around a tube body, etc., and the state of winding and storage of the strip in the drum does not necessarily have variations. In addition, since the drum has a winding width, changes in the unwinding position of the strip will result in a difference in length between when the strip is unrolled and when it is wound around the pipe body, etc., so that the tension must always be kept the same. I couldn't let it go.

If the tension on the tube is weakened, the winding pitch will be disturbed, and if it is strengthened, the winding pitch may become unstable, or the tube may become stuck after the strip is wound. If the tubular body is to be pulled out after processing, the drawing operation will be hindered.

From this point of view, the idea was to make the length of the strip actually wound equal to the length sent out from the drum, so that the strip was wound with a constant tension on the tube body, etc. This is the purpose.

In order to solve this technical problem, in this invention,
A dancer roll, which holds an appropriate number of guide rolls via bearings, is attached to a rotating cylindrical body in front of the disc of a conventional strip winding device, and the dancer roll and disc are pulled together with a constant tension traction device. The dancer rolls are connected to each other so that the dancer rolls swing on the cylindrical body due to the difference between the tension of the strip guided from the guide roll of the disc to the guide roll of the dancer roll and the tension of the traction tool. The technical means is to install a device that detects the swing angle, convert the swing angle into an electrical signal, and input the signal output to the rotation control circuit that rotates the drum to change the strip delivery speed. It is something.

According to this means, when there is a difference between the length of the strip sent out by the drum and the length of the strip wound around the pipe body, the dancer roll swings to guide the strip around the circle. The distance between the guide roll of the plate and the first guide roll of the dancer roll changes, and the rotation of the drum changes in accordance with the swinging of the dancer roll to adjust the length of the strip to be delivered, thereby increasing the traction. The tension of the tool and the tension of the strip are always the same.

Therefore, the tension of the strip wound around the tube body etc. is always constant, regardless of unevenness in the strip winding of the drum or changes in the delivery position.

Moreover, this tension is the same as the tension of the traction tool, which has a constant tension, and the tension for winding around the tube body etc. can be determined by the tension of the traction tool, making it easy for the operator to set the tension. can be done.

Next, an embodiment of the present invention described above will be described based on the drawings.

The drawing shows a device for winding a strip C to form a coil on a mandrel 1 before the tube attachment process in the manufacture of a so-called internal wire hose in which a tube is attached to the outside of the coil. , the strip C is made of piano wire coated with hard vinyl chloride.

The mandrel 1 does not rotate, but is held by guide rollers 2 and 3 located at the front and rear from the top, bottom, right and left, and is configured to move continuously in the direction of the arrow.

The cylindrical body 5 is located between the guide rollers 2 and 3, is cantilever-supported by the supports 4 and 4, and rotates around the central axis of the mandrel 1 on the outside of the mandrel 1.
It is rotated by a motor 6.

The drum 7 wrapped with the strip C is attached via a bearing 8 on the outside of the cylindrical body 5, and is driven by a motor 9.
This motor 9 rotates the drum 7 slightly faster than the cylindrical body 5 by means of a constant tension unwinding device 10, and the strip C is unwound by utilizing this difference in rotational speed. .

A disc 13 is fixed to the cylindrical body 5 in front of the drum 7, and an appropriate number of arms 16 are provided on the outer periphery of the disc 15 to protrude outward from the drum. It is inserted so that it can slide in the axial direction.

The dancer roll 21 is attached to the cylindrical body 5 through a bearing 22 in front of the disc 15, and the dancer roll 21 also holds an appropriate number of guide rolls 23, and the rolled-out strip C is attached to the disc 15 through a bearing 22. It passes from the guide roll group 17 of the dancer roll to the guide roll group 23 of the dancer roll, and further passes through the guide roll 24 held close to the mandrel 1 on the front surface of the cylindrical body 5 to reach the mandrel 1 (see the dashed line in FIG. 2). reference).

The dancer roll 21 and the disc 15 are connected by a constant tension traction device 25 so that a constant tension is applied to their relative circumferential motion. This traction device uses a gas spring, a spring balancer, or the like whose tension does not change even if the traction length changes.

When the tension of the strip C and the tension of the traction device are the same, the dancer roll 21 rotates at the same speed and in the same direction as the rotation of the disc 15, but when the tensions are different, the dancer roll 21 seeks the equilibrium point of the tension. In order to swing, a synchronized transmitter 26 is attached to the disc 15 and a belt 27 is stretched between it and the dancer roll 21. The swing angle of the dancer roll 21 is constantly detected and the voltage signal is used to rotate the drum 7. The rotation of the drum 7 is controlled by transmitting the tension to the control circuit of the motor 9, that is, the constant tension extrusion device 10.

In this embodiment, the mandrel is moved forward without rotating, but the mandrel is rotated and moved forward by rotating the front and rear guide roller groups.
It goes without saying that the strip can also be wound on the mandrel by adjusting the rotation of the cylinder and the drum.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a right side view with a part of the strip winding device cut away, and FIG.
The figure is its front view. 5... Cylindrical body, 7... Drum, 15... Disc,
21...Dancer roll, 25...Constant tension traction device, 26...Synchronized transmitter.

Claims (1)

[Scope of utility model registration request] A drum wrapped with a strip is attached to the outside of the rotating cylindrical body so that it rotates independently from the cylindrical body via a bearing and is removable. A disc holding a guide roll is fixed to the cylinder, and the rotation of the cylinder and the rotation of the drum are adjusted to send out the strip, and the guide roll guides the strip to thread the strip onto a pipe, etc. that advances inside the cylinder. In a device for winding a disc into a shape, a dancer roll equipped with an appropriate number of guide rolls is attached to the cylindrical body through bearings in front of the disc, and the strip passes through the guide rolls of the dancer roll, and the disc and The dancer roll is connected via a constant tension traction device, and a device for detecting the swing angle of the dancer roll is attached to the disk, and the signal output of the detected angle is input to the rotation control circuit of the motor that rotates the drum. A strip winding device characterized in that the strip winding device is configured to change the feeding speed of the strip.