JPS5815417Y2 - string ball for binding - Google Patents

Description

[Detailed explanation of the invention] This invention uses untwisted strings made of plastic film.
The purpose of this project is to improve a tying string ball that is spirally wound in the axial direction and formed into a cylindrical shape. The purpose is to prevent the phenomenon of popping out.

Conventionally, hemp string or plastic twisted string has been used as a binding string.Since hemp string has fluff and plastic twisted string is untwisted, when unwinding these strings, it is necessary to remove them all at once from the inner circumference of the string ball. Although a large amount of string does not come out or kinks occur, these methods have the disadvantage of increasing costs due to rising raw material prices, the need for a twisting process with low production efficiency, etc.

Therefore, in recent years, trial production and research has been conducted on the use of non-twisted plastic strings, which can be mass-produced at low cost without a twisting process, for use in string balls for binding.

Non-twisted strings have a smooth surface and the strings tend to slip on each other, which causes kinks and a large amount of protrusion when the strings are unwound from the inner periphery of the string ball.

In particular, in the case of stiff, non-twisted cords, the elasticity is strong and kinks and popping phenomena occur frequently, leading to tying errors and rendering the cord unusable.

Therefore, if you shape the untwisted string into a wavy shape, for example,
A somewhat uneven interlocking contact state between the strings can be obtained, which can provide insufficient unwinding resistance to the string, so kinks and popping out can be reduced compared to straight untwisted strings that are not corrugated. However, it is still not enough.

In addition, a method has been proposed in which an adhesive is attached to both end surfaces of the string ball, and the adhesive imparts unwinding resistance to the string to prevent kinking and popping out. Resistance is applied only at both ends of the string ball, and the middle part is completely free to unravel, so kinks and pop-outs still occur.

This idea was made in view of the above-mentioned points, and the two ends of the string ball are not only in the middle, but also in the middle, that is, from one end of the string ball to the other end, the strings are in contact with each other through adhesive and uneven meshing. The aim is to provide a tying cord ball that can fulfill the analogy of kinking and popping out of non-twisted cords by imparting appropriate unraveling resistance. In a tying string ball formed into a cylinder by spirally reciprocating the non-twisted string in the axial direction, uneven parts are arranged along the entire length of the non-twisted string, and a releasable adhesive is applied to each protruding part. At the point of attachment.

Hereinafter, embodiments of this invention will be described based on the drawings.

In the drawings, reference numeral 1 denotes a string ball for binding, which is formed by reciprocating a non-twisted string 2 made of plastic in the axial direction in a spiral manner into a cylinder having a predetermined thickness.

This string ball 1 does not have a core material, and the strings 2 are used by being drawn out sequentially from the inner circumference.

The above-mentioned non-twisted string 2 is made by rolling, embossing, etc. the entire length of a stretched thermoplastic plastic string to create a recess 3.
and protrusions 4 are arranged alternately.

As shown in Fig. 3 (■), the uneven structure may be formed by forming recesses 3 and protrusions 4 alternately in the longitudinal direction of the assembly by means such as passing between a pair of gears, or by forming them into a wavy shape. As shown in Figure ■, the protrusions 4 are formed in a scattered manner by passing between a pair of embossing rolls, or as shown in Figures III and IV, the protrusions 4 are
It may be formed in a direction oblique to the longitudinal direction of the assembly.

Then, a releasable adhesive 5 is attached to each of the convex portions 4.

The adhesive 5 is preferably one that does not strongly adhere the strings 2 to each other, but one that can be easily separated by a very small tensile force of the string 2, such as polyvinyl alcohol, which is often used in households. The wax may be attached to the convex portions 4 using glue made by the above method, or paraffin wax may be heated and melted to adhere to and impregnate the convex portions 4.

In addition, polypropylene or polyethylene resin compatible with the string material may be heated and melted to adhere.

When the non-twisted string 2 configured in this manner is formed into a cylindrical string ball 1 by spirally reciprocating in the axial direction as described above, the strings 2 are in contact with each other in which the concave portion 3 and the convex portion 4 are engaged with each other. Thus, it is possible to obtain a string ball 1 which is laminated so as to be laminated and is temporarily attached at intervals over the entire length of the string by means of the adhesive 5 attached to each convex portion 4.

The outer circumferential surface of the string ball 1 is closely covered with a transparent cover 6 made of a heat-shrinkable film tube, and is provided with cover extensions 7 that are extended and tightly attached to both end surfaces of the string ball 1. A string drawer opening 8 is provided which communicates approximately concentrically with the circular inner circumferential surface of 1.

Next, with reference to FIGS. 5 to 7, the manner in which the string ball 1 is fed out will be explained.

Generally, in agricultural binding machines such as binders, the string ball 1 is laid down as shown in the figure, and the non-twisted string 2 is fed out from the inner circumference of the ball through the guide 9 shown in the figure. At the same time, the string 2 is released from the interlocking contact state between the concave portion 3 and the convex portion 4, and at the same time, the temporary attachment with the adhesive 5 is pulled out while separating the bonded portion. Since this is done sequentially and intermittently between the end 1a and the other end 1b of the string ball 1, the string 2 is drawn out in an orderly manner while drawing a large wave as shown in FIG.

For example, if a non-twisted string is made with only unevenness, only an extremely small unwinding resistance will be obtained due to the release of the interlocking part of the uneven part, or if adhesive is applied only to the end face of the string ball. For example, if the adhesive at the end on the side of the string pull-out port and the end on the opposite side separates, the strings can be unraveled completely freely between this end and the draw-out port, so these strings are Make loop A as shown in Figure 6,
As shown in Fig. 1, a kink B occurs, and there are also disadvantages such as a large amount of loop A or kink B being thrown out at once toward the drawer opening of the casing 1, clogging the guide 9, or causing bundling errors. However, in this invention, as mentioned above, due to the interlocking contact between the strings 2 due to the unevenness 3 and 4 and the cooperative action with the temporary bonding part made of the adhesive 5, the string 2 is stretched at small intervals over the entire length of the string 2, and the string tension is Since sufficient unwinding resistance can be applied within a range that does not cause any problems, the loop A1 kink B1 can be unrolled in an orderly manner without causing any problems, and clogging of the guide 9 and bundling errors can be prevented.

In addition, not only when the thickness of the cylinder becomes large at the beginning of the string 2 being fed out, but also when the thickness decreases and there is little string 2 left, the cylinder does not lose its shape and is fed out smoothly and orderly from beginning to end. I'm going.

In addition, if the uneven parts 3 and 4 are arranged in a row on the non-twisted string 2 as described above, the string will have a small radius and will be easy to bend and tie, and the adhesive 5 will be applied only to the protruding parts 4. Needless to say, the strings 2 can be easily separated one after another without increasing the tensile resistance of the strings 2.

Moreover, the adhesive 5 is applied not only to the convex part 4 of the edge 2 but also to the concave part 3.
The adhesive may be applied to the entire length of the string, but in this case, it is necessary to use a thin adhesive so as not to increase the tensile resistance of the string.

As described above, according to this invention, kinking and popping out can be prevented by simply arranging concave and convex portions along the entire length of the non-twisted string of the cylindrical string ball and attaching a releasable adhesive to each convex portion. This has the advantage of being able to provide an inexpensive tying ball, which is completely prevented from losing its shape, and in which the non-twisted string is drawn out in an orderly manner from start to finish.

[Brief explanation of drawings]

Figure 1 is an external perspective view of the tying string ball, Figure 2 is a vertical cross-sectional view,
Figures 3-3 are perspective views showing a part of the non-twisted string constituting the string ball, Figure 4 is an end view of the string ball, and Figure 5 shows a preferred state of the string ball being fed out. , Figures 6 and 7
The figure shows a defective feeding condition. 1... String ball, 2... Non-twisted string, 3...
- Concave portion, 4... Convex portion, 5... Adhesive.

Claims (1)

[Scope of utility model registration request] In a tying string ball formed into a cylinder by spirally reciprocating a plastic non-twisted string in the axial direction, uneven parts are arranged along the entire length of the non-twisted string, and releasable adhesive is attached to each protruding part. A ball of string for binding characterized by having an agent attached to it.