JPH0624373Y2 - Elastic tubing and elastic band - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] This invention aligns the rubber bands and feeds them one by one to an automatic rubber banding machine of the type in which the rubber bands are picked up one by one and passed over the object to be bound. The present invention relates to improvement of rubber tubing and a rubber band used in a rubber band supply device.

[Prior Art] FIG. 4 is a schematic view showing a conventional rubber band feeder shown in Japanese Patent Publication No. 54-3438. The rubber tubing (T) used in the apparatus shown in FIG. 4 is a known rubber tubing for a rubber band, which does not have a special structure. Therefore, the rubber tubing (t) obtained by cutting the rubber tubing (T) into circles is used. ) Is also a known rubber band having no special structure. In FIG. 4, after driving a motor (not shown) to rotate the rotating body (1), the intermittent feeding roller (not shown) feeds the rubber tubing (T) by a predetermined stroke to fix the fixed blade ( 13)
Move the tip of the rubber tubing (T) protruding from the movable blade (12)
When cut with, the rubber band (t) separated from the rubber tubing (T) falls into the rotating body (1), hits the inner peripheral surface of the rotating body (1) in the middle of the fall, and at that time, the horizontal direction The pedestal (15) that is in a stopped state by being given a rotational force while falling along the inner peripheral surface while falling inside the cylinder, changes its shape during cutting, for example, from an 8-shaped shape to an annular shape. Take a ring on top. Also, even if the rubber band (t) does not rotate during the fall and falls along the inner peripheral surface as it is on the pedestal (15) and leans against the inner peripheral surface, the rubber band (t) is (15) After being dropped, it is rotated and eventually rides on the platform in the positioning frame (15a) in an annular shape. In this way the cradle (15)
When one rubber band (t) rides on the top, the lifting platform (17) descends and disengages from the notch (16), and then the cradle (15) moves laterally to supply the rubber band (t). Is completed. By repeating this, the cradle (1
5) It is aligned and fed on the top, and is fed to the automatic rubber band hanging machine (not shown) by the cradle (15).

However, in such a rubber band supply device, since the rubber band is seated on the supply pedestal (15) by utilizing the natural fall from the rotating body (1), the rubber band (t)
Has a large elasticity, and there is a gap (2 to 3 times the rubber band thickness) between the surface of the pedestal (15) and the lower tube mouth of the rotating body (1),
There is a difference between the outer diameter of the rubber band and the diameter of the lower cylinder of the rotating body (1) (the lower diameter of the cylinder is approximately 1.25 times the outer diameter of the band), which causes the rubber band (t) to ride on the positioning frame (15a). However, there is a problem in that it may not be seated on the cradle (15) in a 100% perfect state, such as being biased to the lift (17), resulting in a loss in supply.

Therefore, in order to solve such a problem, a rubber band supply device shown in FIG. 5 has been proposed. In the device shown in FIG. 5, a part of the lift table (17) is an electromagnet that can be switched on and off.
(17a), the electromagnet (17a) is turned on in the rising stop state shown in FIG. The rubber band (a) shown in FIG. 5 has a ring-shaped part having a magnetic part (b) sensitive to a magnet. Since other configurations are the same as those of the conventional device shown in FIG. In FIG. 5, the rubber band (a) put in the rotating body (1) is shown in the lifting table (1
The magnetic part (b) is attracted to the electromagnet (17a) of 7), and it is forcibly and easily seated in a fixed position with its cut surface (cross section) facing down. Also, even if the rubber band (a) does not rotate during the fall and falls along the inner peripheral surface as it is on the pedestal (15) and leans against the inner peripheral surface, this rubber band
(a) is dropped on the pedestal (15) and then turned, after all, as before, the electromagnet (17a) of the lift (17) is attached to the magnetic part of the rubber band (a)
(b) is adsorbed and seats in a fixed position on the pedestal (15) in an annular shape. In this way a rubber band on the cradle (15)
When one (a) is placed, the electromagnet (17a) of the lift table (17) is turned off, and then descends to come off the cradle (15). After this, the cradle (15) moves laterally, and the supply of the rubber band (a) is completed. By repeating this, the rubber bands (a) are fed in an annular state one after another onto the cradle (15).

[Problems to be Solved by the Invention] In the conventional rubber band supply device shown in FIG. 5, the magnetic part (b) of the falling rubber band (a) is connected to the electromagnet (1) of the lifting table (17).
It is possible to supply a complete rubber band by adsorbing it on 7a), but the magnetic part (b) must be provided on the rubber band (a). Conventionally, an adhesive surface portion was provided on a part of the rubber band (a), and the magnetic portion (b) was provided by sprinkling iron powder on the adhesive surface portion, so continuous rubber band supply from the rubber tubing was obtained. Of course not
There is a problem that not only is it very time-consuming to provide an adhesive surface portion for each rubber band and sprinkle iron powder on it, but also the rubber bands (a) stick to each other, resulting in poor workability.

The present invention has been made to solve the above problems, and rubber tubing that can be used in a rubber band supply device of a type in which a rubber band is attracted by an electromagnet,
And to obtain a rubber band obtained by continuously cutting from rubber tubing without sticking to each other.

[Means for Solving the Problems] In order to achieve the above object, in the rubber tubing according to the present invention, 100 to 250 parts by weight of a magnetic material sensitive to a magnet such as iron or nickel powder is used with respect to 100 parts by weight of rubber. A tape-shaped rubber sheet having a thickness of 0.1 to 1.0 mm and a width of 5 to 20 mm, which has been compounded, is stuck or incorporated along the longitudinal direction of the tubing for a rubber band.

Further, the rubber band according to the present invention is obtained by cutting the above rubber tubing into slices.

[Operation] In the rubber tubing configured as described above, since the tape-shaped rubber sheet laminated or contained in the rubber tubing along the longitudinal direction thereof is a magnetic body, a rubber band supply device of a type in which a rubber band is attracted by an electromagnet is used. If this is used, the magnetic material present in a part of the rubber band that has been sliced into pieces will be attracted to the electromagnet and will be reliably seated on the pedestal.

Further, since the rubber band obtained by cutting the rubber tubing into a ring has a tape-shaped rubber sheet of a magnetic material in a part thereof, it can be used in a rubber band supply device of a type in which the rubber band is attracted by an electromagnet. Together, it is continuously obtained from rubber tubing by slicing and does not stick to each other.

[Embodiment] An embodiment of the present invention will be described with reference to FIGS.

FIGS. 1 (a), (b) and (c) are perspective views showing three embodiments of the rubber tubing of the present invention, wherein a rubber tubing (A) made of a latex or solid rubber compound is added to the latex or solid rubber. Tubing tape-shaped rubber sheet (B) with a thickness of 0.1-1.0 mm and a width of 5-20 mm in which 100-250 parts by weight of a magnetic substance such as iron powder or nickel powder is mixed with 100 parts by weight. The rubber tubing (a) or (b) bonded along the longitudinal direction of (A), or the rubber tubing (c) embedded therein.

That is, the rubber tubing (A) shown in FIGS. 1 (a) and 1 (b).
Is a tape with a magnetic substance that is sensitive to the magnet along the longitudinal direction of the tubing (A) at a desired location on the front (a) or back (b) of the rubber tubing (A) made of latex or solid rubber compound. Vulcanize after laminating rubber sheet (B), or tubing (A), sheet (B)
Each of them is vulcanized separately and then pasted, or either tubing (A) or sheet (B) is vulcanized in advance and then tubing (A) or sheet (B) is unvulcanized. It is obtained by vulcanization.

In addition, the rubber tubing (A) of FIG. 1 (c) was obtained by immersing a cylindrical mold in a latex compound and then drying it to obtain latex unvulcanized tubing, and then the tape-shaped rubber sheet (B) described above. ) Is pasted on a mold, further immersed again in the latex compound, and then dried and vulcanized.

Further, FIG. 2 (a) shows the rubber tubing of FIG. 1 (a).
FIG. 2 is a perspective view of a rubber band (a) of the present invention obtained by cutting (A) into a circle, and FIG. 2 (B) is a rubber band obtained by cutting the rubber tubing (A) of FIG. FIG. 2 is a perspective view of the band (a), and FIG. 2 (c) is a perspective view of the invented rubber band (a) obtained by cutting the rubber tubing (A) of FIG. Therefore, the rubber band (a) of FIG. 2 (a) has a magnetic portion (b) made of a rubber sheet (B) on the outer peripheral surface, and the rubber band (a) of FIG. 2 (b) has a magnetic portion (b). b) is provided on the inner peripheral surface, and the rubber band (a) of FIG. 2 (c) has a magnetic portion (b) within its thickness.

Here, the rubber tubing (A) and the rubber band (a) of the present invention are prepared by mixing these powders with rubber once without directly mixing or applying iron powder or nickel powder sensitive to the magnet. Since it is used as a sheet, it is possible to prevent the performance as a rubber band, for example, a decrease in tension or a decrease in elongation, and a rubber tubing (A) and a rubber band (a) which are soft to the touch in appearance. Can be obtained. On the other hand, regarding the stress on the magnet, the amount of the magnetic substance mixed in the tape-shaped sheets (B) and (b) is 100 parts by weight or less of rubber, and the thickness of the sheet is 0.1 mm or more and the width is 5 mm. In the above cases, it was confirmed by experiments that the cross-section was sufficiently attracted to the magnet. In addition, when the mixing ratio of the magnetic material is 250 parts by weight or more with respect to 100 parts by weight of rubber, the strength of the tape-shaped sheets (B) and (b) is weakened and the tape-shaped sheets (B) and (b) are mixed. It is not suitable for rubber bands because it makes the hardness of the rubber extremely high. Also tape sheet
As for the thicknesses of (B) and (b), magnetic sheets such as iron powder and nickel powder are exposed on the surface of the sheet when the sheet thickness is 0.1 mm or less, which is not desirable and the cross-sectional area of contact with the magnet is small. Therefore, it is not preferable because the adsorption force becomes weak. Furthermore, when the thickness of the tape-shaped sheets (B) and (b) is 1.0 mm or more, there is a problem that the step difference at the time of laminating becomes too large and the appearance is spoiled. Also, tape-shaped sheets (B) and (b) having a width of more than 20 mm are not preferable because the elongation of the rubber band is affected.

An example of using the rubber tubing (A) of the present invention in a rubber band feeding device is as shown in FIG. 3, in which the rubber tubing (A) is cut into a ring with a fixed blade (13) and a movable blade (12). Except that the band (a) is put into the rotating body (1), the structure and operation are the same as those of the device shown in FIG.

In the device of FIG. 3, the rubber band thrown into the rotating body (1)
Although (a) is obtained from the rubber tubing (A), it may be arranged such that the rubber band (a) shown in FIG. 2 which has been sliced in advance is directly thrown into the rotating body (1). The tubing (A) may be formed into a continuous rubber band (a large number of rubber bands are continuous on a part of the annular side surface of the rubber band), and then the tubing (A) may be cut into individual pieces and thrown into the rotating body (1).

Further, the rubber tubing (A) and the rubber band (a) of the present invention have been described with reference to the rubber band supply device shown in FIG. Needless to say, any method can be used.

[Advantages of the Invention] As described above, according to the present invention, a rubber tubing that can be used in a rubber band supply device of a type in which a rubber band is attracted by an electromagnet is obtained, and the rubber tubing is continuously attached to the rubber tubing without being stuck to each other. The effect is that the rubber band obtained in the above can be obtained.

[Brief description of drawings]

1 (A) to (C) are perspective views of rubber tubing showing three embodiments of the present invention, and FIGS. 2 (A) to (C) are obtained from FIGS. 1 (A) to (C). Rubber band perspective view, 3rd
FIG. 1 is a schematic view showing a rubber band supply device using the rubber tubing of FIG. 1 (a), and FIGS. 4 and 5 are schematic views showing conventional rubber band supply devices. In the figure, (A) shows a rubber tubing, (B) shows a tape-like sheet, (a) shows a rubber band, and (b) shows a magnetic portion. The same reference numerals in the drawings indicate the same or corresponding parts.

Claims (2)

[Scope of utility model registration request] 1. A tape-like rubber having a thickness of 0.1 to 1.0 mm and a width of 5 to 20 mm, in which 100 to 250 parts by weight of a magnetic material such as iron or nickel powder is mixed with 100 parts by weight of rubber. A rubber tubing, characterized in that the sheets are laminated or included along the longitudinal direction of the rubber band tubing. 2. A rubber band obtained by cutting the rubber tubing according to claim 1 into slices.