JPS6274857A - Tape takeup motion - Google Patents

Abstract

PURPOSE:To make improvements in a product in quality, by attaching a magnetic pole tight to a turning shaft, and installing a conductive tubular material, which is rotated in the same direction by action of electromagnetic force with rotation of the said magnetic pole, in a paper tube holder. CONSTITUTION:A paper tube 5 is fitted on an outer circumferential surface of a paper tube holder 4, then air is fed to a hollow part of a turning shaft 1 and a sliding piece 10 is pressed to the radial outside from a hole 8a, making it into slide motion, whereby the paper tube 5 is tightly attached to the paper tube holder 4. Next, when the turning shaft 1 is rotated, an eddy current is produced in a conductive tubular member 8 whereby electromagnetic force acts between this tubular member and the magnetic flux made by a magnetic pole 2 so that the conductive tubular member 8 rotates in the same direction as the turning shaft 1. This turning force comes to serve as torque for winding a tape 11. This torque T is controllable at will by controlling a revolving speed of the turning shaft 1. Therefore, there is produced no dust addending upon friction and also there is no generation of frictional heat, so that such a possibility that dust sticks to the tape 11 and/or an adverse effect due to heat is in no case exerted on the tape 11, thus there is no deterioration in the quality of a product.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention involves winding a raw material (hereinafter collectively referred to as tape) such as a tape, a band-shaped film, a band-shaped sheet 1, etc. onto a paper tube (cylindrical core). This invention relates to a tape winding device.

(Prior art) When forming a plurality of narrow tapes from a wide raw material through a slitting process and winding them around a paper tube, each paper tube is subjected to a rotational force of more than a predetermined value. It is necessary to prevent the winding force of the tape from becoming too strong or causing the tape to break.

Therefore, as a conventional technique, a paper tube holder is rotatably mounted on the rotating shaft, and a II friction connection is provided between the paper tube holder that holds the paper tube and the rotating shaft, and the paper tube holder is connected to the rotating shaft. Structures that cause slippage are already known.

(Problems to be Solved by the Invention) However, in the above-mentioned conventional configuration, there was a problem in that a considerable amount of heat was generated due to friction in the friction coupling part, which had an adverse effect on the product, and dust was generated due to the friction. occurs,
There was also the problem that this dust landed on the tape being wound.

(Means for IC to solve the problem) The present invention provides a paper tube holder capable of holding a paper tube in a fixed state, which is rotatably and concentrically supported on the outer periphery of a rotating shaft, and a magnetic pole is attached to the rotating shaft. The tape winding device is characterized in that the paper tube holder includes an electrically conductive cylindrical member that is fixed and rotates in the same direction as the magnetic pole rotates due to the action of one force.

(Example) In FIGS. 1 and 2 showing an example of the present invention, reference numeral 1 denotes a hollow cylindrical rotating shaft, which is connected to a continuously variable speed motor (not shown). A plurality of (for example, six) 18412 are fixed to the rotating shaft 1 at predetermined intervals in the length direction with bolts 3 concentrically with the rotating shaft 1. This magnetic pole 2
is formed by a permanent magnet and has a plurality of (for example, four) N poles 2a and S poles 2b protruding in the radial direction,
The poles 2a and S poles 2b are arranged alternately. Further, as shown in FIG. 2, the rotating shaft 1 is provided with a communication hole 1a for supplying air from the shaft center side to the paper tube holder 4 side.

Reference numeral 4 denotes a paper tube holder capable of holding the paper tube 5 in a fixed state, and is made of resin or iron, and is rotatably supported on the outer periphery of the rotating shaft 1 via a bearing 6 and concentrically with the axis of the rotating shaft 1. has been done. A recess 7 for accommodating the 111M2 is formed at a predetermined location on the axis side of the paper tube holder 4, and the inner circumferential surface 7a of this four part 7 is formed by the action of electromagnetic force as the magnetic pole 2 rotates. Conductive cylindrical member 8 rotating in the direction
is fixed. Also, a through hole 9 communicating with the paper tube 5 is formed at a predetermined position in the radial direction of the inner circumferential surface 7a of the four parts 7, and a hole 9 on the center side in the radial direction for fixing the paper tube 5 is formed in the through hole 9. A projection 10a is formed on the surface of the sliding piece 10 that comes into contact with the paper tube 5 when the sliding piece 10 is housed. The conductive cylindrical member 8 is formed using a steel machine or the like having low electrical resistance, and a hole 8a is provided in a portion of the conductive cylindrical member 8 that faces the through hole 9. When fixing the paper tube 5 to the paper tube holder 4, the rotating shaft 1
Air from the axial center side passes through the communicating hole 1a and the hole 8a and suppresses the sliding piece 10 radially outward.

11 is a tape wound around the paper tube 5.

Next, the operation will be explained. First, without supplying air to the center of the rotating shaft 1 on the axis side, the paper tube 5 is fitted onto the outer peripheral surface of the paper tube holder 4 with the sliding piece 10 retracted toward the axis, and then the rotation Air is supplied to the hollow part of the shaft 1. This air flows into the recess 7 through the communication hole 1a, presses the sliding piece 10 radially outward through the hole 8a, and causes the sliding piece 10 to slide.
are engaged with the inner circumferential surface 5a of the paper tube to fix the paper tube 5 to the paper tube holder 4.

Next, the motor is started to rotate the rotating shaft 1.

As the rotating shaft 1 rotates, an eddy current is generated in the conductive cylindrical member 8, and this thin current and the magnetic I! ! A lit force acts between the magnetic fluxes caused by the magnetic fluxes 2 and 2, causing the conductive cylindrical member 8 to rotate in the same direction as the rotating shaft 1. This rotating force becomes the torque for winding the tape 11, and this torque T is T=K (N
1-N2). Here, K is a constant determined by the strength of the magnetic pole 2, and N1 is the rotation speed of the rotating shaft 1 (r
pm>, N2 is the rotational speed (ROM) of the conductive cylindrical member 8
). The rotational speed N1 of the rotating shaft 1 is variable by a continuously variable speed motor, and the retainer 1 is used to control this N1.
The winding torque of 1 can be freely controlled.

FIG. 3 shows the changes in the state of the tape 11 when it is wound up, and shows the tension 1 required to wind up the tape 11.
is regulated by resistance such as a powder brake (not shown) and shows a constant value. On the other hand, as the winding of the tape 11 progresses, the winding radius expands from γ1 to γ2. The torque acting on the paper tube 5 gradually increases. Therefore, in order to wind the tape 11 at a constant speed, it is necessary to wind the tape 11 with a larger torque as the winding progresses. In this embodiment, the formula T =
As is clear from K(Nl - N2), by increasing the rotational speed N1 of the rotating shaft 1, the torque acting on the paper tube boulder 4 side can be gradually and easily increased.

When winding of the tape 11 is finished, the rotation of the motor is stopped and the rotation of the rotating shaft 1 is stopped. Next, the air supply is stopped, the sliding piece 10 is moved out of the paper tube 5 to release the paper tube from the paper tube holder 4, and then the tape 11 is wound from the paper tube holder 4. I'll remove the paper tube 5 that I took.

In the above embodiment, a permanent magnet is used as the magnet 1th2, but in other embodiments, an electromagnet may be used as the magnetic pole 2. In such a configuration, the amount of current flowing through the electromagnet is controlled to The torque acting on the flexible cylindrical member 8 can be easily controlled.

In another embodiment, the paper tube boulder 4 and the conductive cylindrical member 8
The paper tube 5 and the paper tube holder 4 may be fixed to each other by using other fixing means instead of being limited to the structure in which air presses the sliding piece 10. Good too.

(Effects) In the tape winding device according to the present invention, the paper tube holder 4 capable of holding the paper tube 5 in a fixed state is rotatably supported on the outer periphery of the rotating shaft 1 and concentrically with the rotating shaft 1, and axis 1
While the magnetic pole 2 is fixed to the paper tube holder 4, the paper tube holder 4 is equipped with a conductive oriented member 8 that rotates in the same direction due to the action of electromagnetic force as the magnetic pole 2 rotates. Unlike the case where rotational force is transmitted from the rotation @1 side to the paper tube holder 4 side, there is no generation of dust associated with *S, and no generation of large frictional heat. Therefore, dust does not adhere to the tape 11 to be wound, and the tape 11 is not adversely affected by heat, and problems that degrade the quality of the product do not occur.

In addition, in the tape winding device of the embodiment shown in FIGS. 1 and 2, the large jaggedness of the torque generated on the paper tube holder 4 side can be freely adjusted by controlling the rotation speed of the rotating shaft 1 by the continuously variable speed motor. Even if the winding of the tape 11 progresses and a large torque is required for winding, it can be easily coped with, and the tape 11 can be easily wound at a constant tension and at a constant speed. becomes.

In other embodiments in which an electromagnet is used as the magnetic pole 2, the rotation I
By controlling the amount of current to the electromagnet, the magnitude of the torque generated on the paper tube holder 4 side can be easily controlled without changing the rotation speed of the III 11.

[Brief explanation of drawings]

FIG. 1 is a partially omitted vertical sectional side view of an embodiment of the present invention;
FIG. 2 is a partially omitted longitudinal sectional side view, and FIG. 3 is a longitudinal sectional front view of the main part showing the state of winding the tape. DESCRIPTION OF SYMBOLS 1...Rotating shaft, 2...Magnetic pole, 4...Paper tube holder, 5...Paper tube, 8...Conductive cylindrical member patent applicant Pneumatic Industries Co., Ltd. Agent Patent attorney Omori Tadako', "l-te. -: Figure 1 70 σatuag

Claims (1)

[Claims] A paper tube holder capable of holding the paper tube in a fixed state is rotatably and concentrically supported on the outer periphery of the rotating shaft, and a magnetic pole is fixed to the rotating shaft, while the paper tube holder is capable of supporting the rotation of the magnetic pole. 1. A tape winding device comprising a conductive cylindrical member that rotates in the same direction due to the action of an electromagnetic force.