JPH07315690A - Winding body of thermoplastic resin cord and method for manufacturing the same - Google Patents

Abstract

PURPOSE:To manufacture a winding body made of a thermoplastic resin without a core body and without releasing it from the winding start end by connecting an end of the cord without the core body subjected to the winding start to either of thermoplastic resin cords wound into the coiled form. CONSTITUTION:The left side core 2 and right side core 3 previously joined on the joining surfaces 21, 31 are mounted on a winding machine. On the other hand, cord-like thermoplastic resin is extruded from an extruder to be taken up on a core 1. Then, after the resin passing through a guide 42 is wound by one round around the central part of the core 1, the winding start portion and one round winding portion overlapping each other are welded 41 to each other. Thereafter, the thermoplastic resin cord 4 is uniformly wound around the core 1 by the guide 42 to stop the cord at the winding completion by a tape 51. A winding body 5 of the thermoplastic resin cord 4 is manufactured by drawing out the right and left side cores 3, 2 respectively to the right and left sides. Thus, the wound body of the thermoplastic resin cord 4 without the core body and without releasing it from the winding start end can be transported.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wound body of a cord made of a thermoplastic resin for bundling and a method of manufacturing the same. In particular, the present invention relates to a wound body of a thermoplastic resin string which is easy to use as a string for automatic packing attached to a packing machine, and as a string for hand-tying and binding, and a manufacturing method thereof.

[0002]

2. Description of the Related Art A thermoplastic resin string is formed by melting a polyolefin-based thermoplastic resin such as polypropylene, extruding it into a string shape, stretching it at a drawing speed faster than the extrusion speed, and then winding it around a core such as a paper tube. It is manufactured. Since this thermoplastic resin string has various features such as strength and easy packing, it is extremely convenient, so it can be used by attaching it to a packing machine such as a semi-automatic packing machine, an automatic packing machine, a hand tool, a metal fitting seal, It is often used as a string for hand-tying and bundling with stoppers.

Many windings of a thermoplastic resin string used by being attached to a packing machine such as a semi-automatic packing machine or an automatic packing machine are used in a coil shape in which a thermoplastic resin string is coiled many times on a paper tube having a thickness of 4 to 7 mm. It is a rolled one.

Further, as shown in FIG. 4, most of the windings of the thermoplastic resin cord for hand-tight binding are the windings 100 of the thermoplastic resin cord without the core. The end 201 of the thermoplastic resin string 200 at the beginning of winding is pulled out and used as a string for hand-tight binding for packing with a hand tool, a metal fitting seal, and a stopper. As shown in FIG. 5, the coreless thermoplastic resin cord winding body 100 includes a thermoplastic resin cord 200 that starts to be wound between the joint surface of the left core 301 and the joint surface of the right core 302. Edge 201
, The thermoplastic resin string 200 is wound into a coil many times, and then the left core is placed on the left side.
Further, the right core is pulled out to the right to manufacture. In addition, 400 is a guide, and the thermoplastic resin cord 20
0 is moved in the width direction of the core 300 and wound uniformly.

Further, as another method for producing the wound body of the thermoplastic resin string without the core, as described in Japanese Patent Publication No. 3-72548, after winding the thermoplastic resin string around the core, A method is known in which the core is removed after annealing at 60 ° C to 120 ° C.

[0006]

However, the winding body of the thermoplastic resin string for automatic packing, in which the thermoplastic resin string is wound around the paper tube in a coil shape many times, after using the thermoplastic resin string, I was throwing away the paper core, but the disposal of this paper core is a problem. Reusing the paper tube can be considered as a method of solving this problem, but it has been found that the paper tube once used is severely deformed and damaged and cannot be reused. Also, instead of this paper tube, a synthetic resin core body that is resistant to deformation and damage is also conceivable, but the synthetic resin core body is not only expensive, but also the recovery cost is high, so that There is a strong demand for a wound body of a string made of a thermoplastic resin.

In the wound body of the thermoplastic resin string for hand-tightening and binding shown in FIG. 4, the thermoplastic resin string is pulled out from the center portion of the winding start and is used. When a winding body is attached to a drum for use in a semi-automatic packing machine or automatic packing machine, the winding start end is unraveled and it is difficult to set it on the packing machine drum, and it is difficult to use as a string for the packing machine.

Further, the wound body of the thermoplastic resin string produced by the method described in Japanese Patent Publication No. 3-72548 is simply
Since the string is attached to the string by annealing and the winding start part is not fixed, it is more difficult to untie than the conventional string for hand-tying and binding, and it is also difficult to set it on the drum. In addition, there is a problem that the string is easy to be unwound from the winding start portion and is difficult to carry during transportation from the factory where it is manufactured to the user.

Therefore, an object of the present invention is to provide a winding body of a thermoplastic resin string without a core body in which the string cannot be unwound from the beginning of winding and a manufacturing method thereof.

[0010]

The present invention has been made to achieve the above object, and the invention of claim 1 is as follows.
In a winding body of a thermoplastic resin string in which a thermoplastic resin string is wound a number of times in a coil, the end of the winding start is connected to one of the thermoplastic resin strings wound in a coil shape without a core body. It has been done.

According to the second aspect of the present invention, the thermoplastic resin cord is wound around the core formed by joining the end faces of the left core and the right core one to several times, and the end of the winding start is heated by this winding. After connecting to a string made of a thermoplastic resin, a string made of a thermoplastic resin is wound in a coil shape many times, and then the left core is pulled out to the left and the right core is pulled out to the right.

According to the third aspect of the present invention, one layer of thermoplastic resin string is wound around the core formed by joining the end surfaces of the left core and the right core, and a tape is attached to the upper surface of this layer to form one layer. After connecting, the thermoplastic resin string is wound into a coil many times, and then the left core is pulled out to the left side and the right core is pulled out to the right side.

In the invention of claim 2, the winding start end of the thermoplastic resin string is connected to the wound thermoplastic resin string, but there are various connecting methods. For example, they may be connected with a stapler, may be adhered with a tape for connection, or may be heat-sealed. In particular, the method of fusion bonding is preferable because the connection can be performed quickly.

The end faces of the left core and the right core used in claims 2 and 3 are joined together to form a core. After the thermoplastic resin string is wound around the core,
In order to easily pull out the left side core and the right side core to the right side, the outer peripheral surfaces of the left side core and the right side core may be inclined surfaces that are inclined so that the diameter decreases toward the joint surface.

[0015]

In the wound body of the thermoplastic resin cord according to the first aspect of the present invention, the winding start end is connected to one of the thermoplastic resin cords wound in a coil shape. Can't be solved. Therefore, the winding body of the thermoplastic resin string can be attached to the semi-automatic packing machine or the automatic packing machine for use, and the winding start cannot be unraveled during transportation. Further, it can be used as a hand-tightening bundling string for pulling out the end portion of the winding start, removing the connecting portion, and packing with a hand tool, a metal fitting seal, and a stopper.

In the method for manufacturing a wound body of a thermoplastic resin string according to claim 2, the thermoplastic resin string is wound around the core once or several times, and the winding start end portion is wound on the wound thermoplastic resin string. In the method for manufacturing a wound body of a thermoplastic resin string according to claim 3, one layer of the thermoplastic resin string is wound on the core, and the tape is attached to the upper surface of this one layer to form the tape. Since it is connected by, even if the core made of thermoplastic resin is wound many times and then the core is removed, the end of the winding start cannot be unraveled. Also, after winding the thermoplastic resin string around the core, the left core is pulled out to the left side, and the right core is pulled out to the right side. In particular, if the diameter of the inclined surface is reduced toward the joint surface, it becomes easier to slip out.

[0017]

EXAMPLES Next, examples of the present invention will be described. 1 and 2 show an embodiment of the present invention. FIG. 1 is an explanatory view showing a state where a thermoplastic resin string is started to be wound around a core, and FIG. 2 is a thermoplastic resin manufactured by the method shown in FIG. It is explanatory drawing which shows the winding body of a resin string. FIG. 3 shows another embodiment of the present invention and is an explanatory view showing a state in which a thermoplastic resin cord is started to be wound around the core.

In FIG. 1, reference numeral 1 is a core, and this core 1 is obtained by joining a joining surface 21 of a left core 2 and a joining surface 31 of a right core 3 to each other.
The outer peripheral surface 22 of the right core 3 and the outer peripheral surface 32 of the right core 3 are joint surfaces 2
The inclined surface is inclined so that the diameter decreases toward 1 and 31. Reference numeral 4 is a thermoplastic resin string made of polyolefin such as polypropylene, and 41 is a fused portion of the thermoplastic resin string. 42 is a guide, and this guide 42 reciprocates in the width direction of the core 1.
Can be wound substantially uniformly in the width direction of the core 1. 5
Is a roll of the thermoplastic resin string 4.

Next, a method of manufacturing the winding body of the thermoplastic resin string will be described. In advance, left core 2 and right core 3
Is attached to the winder by joining the joining surfaces 21 and 31. On the other hand, a thermoplastic resin made of polyolefin is melted by an extruder (not shown) and extruded in a string shape. The extruded cord is drawn faster than the extrusion speed and stretched, and the stretched thermoplastic resin cord is wound around the core 1. At this time, after passing through the guide 42 and making one turn in the substantially central part of the core 1, a trowel is applied to the overlapped portion between the start of winding and the one-turned portion for fusion bonding 41, and then the same method as in the conventional method is used. Guide the thermoplastic resin cord 4 to the core 1 with the guide 42.
The tape is evenly wound around the tape, and the end of winding is stopped with tape 51.
After winding, pull out the right core 3 to the right and the left core 2 to the left.

Then, the winding body 5 of the thermoplastic resin cord 4 as shown in FIG. 2 can be manufactured. This thermoplastic resin string 4
Since the winding start of the winding body 5 is connected by the fused portion 41, it cannot be unwound. Therefore, the winding body 5 of the thermoplastic resin string 4 can be attached to the drum of a semi-automatic packing machine or an automatic packing machine, the tape 51 can be removed, and the tape can be rewound from the winding end portion for use. It is also possible to pull out the winding start from the central portion and cut the fusion-bonded portion 41 to use it as a string for hand-tight binding.

Next, the embodiment shown in FIG. 3 will be described. When the embodiment shown in FIG. 3 is compared with the embodiment shown in FIG. 2, the winding start and the method of connecting the thermoplastic resin string 4a are different. That is, the thermoplastic resin string 4 that has passed through the guide 42a.
About 1 layer of a is wound around the core 1a, then the tape 6 is attached to the upper surface of this 1 layer to connect 1 layer, and then the thermoplastic resin string 4a is attached to the core 1a by the guide 42a in the same manner as in the prior art. Wind evenly in the width direction, and tape the end of winding.

Since the winding start of the wound body of the thermoplastic resin string 4a is connected by the tape 6, it cannot be unwound. Therefore, the wound body of the thermoplastic resin string 4a can be attached to the drum of the automatic packing machine or the semi-automatic packing machine for use.
Alternatively, the winding start can be pulled out from the central portion, the tape 6 can be peeled off, and it can be used as a string for hand-tight binding.

[0023]

As described above in detail, in the winding body of the thermoplastic resin cord of the present invention, the end of the winding start is connected to any one of the thermoplastic resin cords wound in a coil shape. , This winding start is unsolvable. Therefore, the wound body of the thermoplastic resin string can be used in an automatic packing machine or a semi-automatic packing machine, and can also be used as a string for hand-tight binding.

Further, since the winding body of the thermoplastic resin cord of the present invention has no core body such as a paper tube, it is not necessary to dispose or recycle the core body, and the disposal problem can be solved. In the present invention,
As in claim 2, the thermoplastic resin string is wound around the core once or several times, and the end of the winding start is connected to the wound thermoplastic resin string body, or as in claim 3, the core is wound. It is convenient to wind one layer of a string made of thermoplastic resin on and to connect the one layer with a tape because the ends of the winding start can be easily connected.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention and is an explanatory view showing a state in which a thermoplastic resin cord is started to be wound around a core.

FIG. 2 is an explanatory view showing a winding body of a string made of a thermoplastic resin manufactured by the method shown in FIG.

FIG. 3 shows another embodiment of the present invention and is an explanatory view showing a state in which a thermoplastic resin cord is started to be wound around the core.

FIG. 4 is an explanatory view showing a conventional winding body of a string for binding by hand.

FIG. 5 is an explanatory view showing a conventional method for manufacturing a string for hand-tight binding.

[Explanation of symbols]

 1, 1a Core 2 Left core 21, 31 Bonding surface 3 Right core 4, 4a Thermoplastic resin string 5 Thermoplastic resin string roll 6 Tape

Claims (3)

[Claims] 1. A winding body of a thermoplastic resin string in which a thermoplastic resin string is wound in a coil shape a large number of times, and a thermoplastic resin string in which there is no core and a winding start end is wound in a coil shape. A wound body of a string made of a thermoplastic resin, characterized in that the wound body is made of a thermoplastic resin. 2. A thermoplastic resin cord is wound one or several times around a core obtained by joining the end faces of the left core and the right core, and the end of the winding start is connected to the wound thermoplastic resin cord. After that, wrap a string made of thermoplastic resin in a coil many times,
After that, the left core is pulled out to the left side, and the right core is pulled out to the right side. 3. A layer made of a thermoplastic resin is wound around a core formed by joining the end faces of the left core and the right core together, and a tape is attached to the upper surface of the one layer to connect the one layer, and then the thermoplastic A method for manufacturing a wound body of a thermoplastic resin string, comprising winding a resin string in a coil shape a number of times, and then withdrawing a left core to the left and a right core to the right.