JPH0628527Y2 - Winding core for strip with rewinding mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a winding core for a belt-like material with a rewinding mechanism, which is provided when winding of a belt-like material continuously drawn out from the winding core is stopped. The present invention relates to a winding core for a belt-shaped article, which is provided with a mechanism for automatically rewinding the over-feeding belt-shaped article on the winding core due to excessive rotation due to the rotational inertia moment inherent in the core.

(Prior art) When a strip of paper, cloth, resin film, etc., wound around the surface of the core body is continuously pulled out while rotating the core, excessive rotation of the core due to the moment of inertia of rotation. In order to suppress the excessive supply mainly due to the sagging phenomenon of the belt-like material, a braking mechanism that acts considerably strongly is installed in the core body. Further, when it is necessary to constantly apply tension to the strip-shaped material drawn out from the winding core, a device for constantly applying tension to the drawn-out strip-shaped material using a roller group or the like is provided separately from the core body. ing.

(Problems to be solved by the invention) In order to suppress excessive rotation of the winding core, when the braking mechanism attached to the winding core body is too strong, the smoothing operation of pulling out the strip from the winding core There is a problem with, and the work of pulling out from the winding core of the belt-shaped material that overcomes the strong braking force,
This results in an excessive tension on the strip. Further, in order to reduce this adverse effect, if the braking force of the braking mechanism for the winding core is weakened, the work of pulling out the strip is smoothly performed, while the supply of the strip is stopped and the winding core is completely stopped. Due to the time difference, the strip loses its tension and sags, resulting in the problem that the smooth feeding operation of the strip is obstructed.

The present invention has been made in view of the above problems of the conventional technique, and the purpose thereof is to pull out due to excessive supply due to the moment of inertia of rotation of the winding core even after the supply of the band-shaped material is stopped. Another object of the present invention is to provide a winding core for a band-shaped material which can be rewound on the winding-shaped material by winding the band-shaped material on the winding-shaped material and which can impart appropriate tension to the band-shaped material.

(Means for Solving the Problem) In order to achieve this object, the present invention has the following configuration.

That is, in the winding core for a belt-like material with a rewinding mechanism according to the present invention, the shaft is rotatably equipped with the winding core body and the braking rotating body to which the braking force is constantly applied. And
Between the core body and the braking rotator, there is an engaging mechanism that secures a play in the direction of rotation so that the core body and the braking rotator rotate with the braking rotator. Further, a tension spring is stretched between the winding core body and the braking rotor.
In this engagement mechanism, an arcuate elongated hole is bored in a rotating body integrally attached to the core body, and an engaging pin planted in the braking rotating body is inserted into the elongated hole, so that In order to additionally connect the rotating body, it is stretched between a coupling pin embedded in the rotating body and an engaging pin of the braking rotating body.

The engaging mechanism and the rewinding mechanism including the tension spring are housed in the recess formed in the side portion of the core body.

(Operation) By pulling out a belt-shaped material such as paper or cloth wound around the peripheral surface of the core body, the core body rotates on the shaft. The rotation of the winding core body is linked to the rotation of the winding core body through an engagement mechanism, and always causes the braking rotating body on which the braking force is applied to rotate together. A tension spring is stretched between the winding core body and the braking rotor, and the rotation of the winding core body causes the tension spring between the rotating braking bodies to expand. It is maintained while spinning. When the supply of the band-shaped material is stopped, the core body is also stopped, but the braking rotor, on which the brake is constantly operating, is stopped prior to the complete stop of the core body. The core body still has excessive rotation due to the action of the moment of inertia that causes it to rotate even after the band-shaped material is stopped, whereby a part of the band-shaped material is pulled out. By the complete stop of the braking rotor, the tension spring that was in the stretched state between the core bodies was reduced this time, and the core body was returned in the opposite direction and rotated.
The strip-shaped material is rewound onto the core, and the core body is stopped in a state where appropriate tension is applied to the strip-shaped material.

(Example) Hereinafter, a specific example of the winding core for a belt-like material with a rewinding mechanism according to the present invention will be described with reference to the drawings.

FIG. 1 is a central longitudinal sectional view of a winding core for a band-shaped material according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line AA of FIG.

In the figure, (1) is a columnar core body, with roller bearings (4) and (4) on shafts (3) supported at both ends by bearings (2) and (2) in a non-rotating state. It is rotatably mounted. A concave portion (5) extending in the axial direction of the winding core is formed at one end of the winding core body (1), and a series of rewinding mechanism of the main winding core is housed in the concave portion (5). .

The disk-shaped rotating body (7), which is arranged at the innermost part of the recessed portion (5) of the winding core body and has the shaft (3) inserted through the center, is the rotating body.
Insert the tips of multiple connecting pins (8) (8) planted on the (7) surface into the pin holes (9) (9) formed in the inner wall of the recess (5) of the core body. By urging, the rotating body (7) is additionally connected to the core body (1) and is rotatably installed together with the core body (1). On the outside of the rotating body (7) integrally attached to the winding core body (1), a disc-shaped braking rotating body (11) in charge of braking, in which the shaft (3) is inserted in the center part, is arranged. The plurality of engaging pins (12) (12) implanted on the surface of the rotating body (11) are formed in the rotating body (7) with the center of the rotating body (7) on the core side being concentric. Insert a plurality of arcuate slots (10) (10) into the connecting pin (8)
(8), the engaging pin (12) (12) and the arcuate elongated hole (10) (10) by the engagement mechanism, the braking rotor (11) and the core body (1) have a margin in the rotational direction. I secure play. Further rotating body
(7) between the intermediate body of the connecting pin (8) (8) planted on the surface and the tip of the engaging pin (12) (12) planted on the braking rotor (11) Tension springs (13, 13) are stretched between them. The friction plate (15) is in contact with the outer surface of the braking rotor (11), and the friction plate (1)
A compression spring (17) located between the pair of spring bearings (16a) and (16b) abuts against the back surface of the outer spring bearing (16a) and is screwed to the shaft (3) on the outer side of (5). The attached nuts (18) are sequentially arranged. The force of the tension spring (13) is the friction plate.
It is set smaller than the braking force of (15). (R) is a strip of paper, cloth, or the like wound around the circumference of the core body (1).

The amount of compression of the compression spring (17) is adjusted by the screwing operation of the nut (18), whereby the braking rotor (11) of the friction plate (15) is adjusted.
The crimping force to the is controlled and the connecting pin (12) of the braking rotor (11)
The rotation restraining force on the rotating body (7), and further on the shaft (3) of the core body (1) via the (12) is adjusted. As a result, the tension spring (13) is compressed and biases the core body (1) in the direction opposite to the withdrawal direction of the strip, and the core body (1) in which the strip (R) is rolled around the peripheral surface is stopped. This is the state (see FIG. 2).

When the strip (R) is pulled out in the direction of the arrow (see Fig. 3), the core body (1) rotates, and the rotating body (7) also starts to rotate in the clockwise direction as shown in Fig. 3 and the tension spring ( 13) grows. At this start,
One braking rotor (11) is stopped. After this rotating body
As the rotation of (7) continues, the distance between the pair of connecting pins (8) on which the tension spring (13) is stretched and the engaging pin (12) gradually expands through the arc-shaped elongated hole (10), and the tension is increased. The spring (13) is always extended to the maximum, and the engaging pin (12) engages with the end of the arcuate elongated hole (10) formed in the rotating body (7), and the braking rotating body (11) on the braking side. ) Also starts rotating with the rotating body (7). In this state, the braking rotor (11) is braked by the friction plate (15) in pressure contact, and the braking rotor (11) continues to rotate while the braking force is constantly applied to the braking rotor (11). . While the belt (R) is continuously pulled out from the core body (1), the tension spring (13) is maximized by overcoming the braking force of the friction plate (15) acting on the braking rotor (11). Under the stretched condition, the core body and both rotating bodies (7) and (11) continue to rotate (see FIG. 4).

When the work of pulling out the strip (R) is stopped, the braking rotor
Since the braking force is constantly applied to (11), it stops immediately, but the core body (1) slightly overruns due to inertia of the rotating system and then stops. In this state, the rotating body (7) is reversely rotated by the contraction movement of the stretched tension spring (13), and
Apply tension to (R) in the reverse winding direction and stop at a balanced position (see Fig. 5).

(Effect of the Invention) This invention is a pair of a winding core body and a winding core, and a tension spring is stretched between the braking rotation bodies that are also mounted on the shaft, so that the braking rotation body can be quickly stopped. In the same manner as above, the contraction force of the tension spring in the stretched state is used as the reverse rotation force of the winding core body, so that the belt-shaped material excessively pulled out from the winding core body due to the rotational moment of inertia is instantly wound. The slack phenomenon that has been returned and remains on the belt without a special tension mechanism is completely eliminated, maintenance of the belt can be maintained, and the rewound belt portion can be rewound.
Appropriate tension is maintained so that the work after polishing can be made smooth, and when the strip is pulled out, appropriate tension is applied to the strip, making it easy to perform various operations on the strip. Become. By adopting the mechanism according to claim 2, it is possible to easily realize the accompanying rotation of the core body and the braking rotor.
By using each pin used for the locking connection between the braking rotor and the winding core body as a mounting member for the extraction spring, the mechanism can be simplified. Even in the case of the winding core body having the shape, the space of the entire device can be reduced.

[Brief description of drawings]

FIG. 1 is a central longitudinal cross-sectional view of a winding core for a band-shaped material according to the present invention, FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1, and FIG. 3 is a corresponding view of FIG. FIG. 4 is a diagram showing a state immediately before the withdrawal of the strip, FIG. 4 is a diagram showing a strip withdrawal operation of the strip, and FIG. 5 is a diagram showing a state immediately after stopping the strip withdrawal supply work. (1) …… Core body (3) …… Shaft (5) …… Recess (7) …… Rotating body (8) (8) …… Connecting pin (9) (9) …… Pin hole (10 ) (10) …… Arc hole (11) …… Brake rotor (12) (12) …… Engage pin (13) (13) …… Tension spring (15) …… Friction plate (17)… … Compression spring (R) …… Strip

Claims (3)

[Scope of utility model registration request] 1. A winding core body of a belt-like material and a braking rotary body on which a braking force is constantly applied are rotatably mounted on the same shaft, and the braking rotary body and the winding core body have a margin in a rotation direction. A revolving mechanism-equipped core for a band, which is configured to be rotatable together with an engagement mechanism capable of ensuring play and in which a tension spring is stretched between the core body and the braking rotor. 2. The engaging mechanism is configured such that an engaging pin implanted in a braking rotor is inserted into an arcuate elongated hole formed in a rotor attached to the core body, and the engaging mechanism rotates on the core body. The winding core for a belt-like material with a rewinding mechanism according to claim 1, wherein a tension spring is stretched between the connecting pin and the engaging pin which are planted in the rotating body to additionally connect the body. 3. A belt-like article with a rewinding mechanism according to claim 1, wherein a series of rewinding mechanisms including an engaging mechanism and a tension spring are accommodated in a recess formed in a side end of the winding core body. Winding core.