JPH0221488Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial field of application> The present invention is a string ball used in binders, knotters, etc. of agricultural machinery, or other binding machines, and is used for hollowing out strings from the center hole. Regarding string balls.

<Prior Art> As is well known, string balls used in binders, knotters, etc. of agricultural machinery or other binding machines are
As shown in FIG. 1, a string 1 is cross-wound into a cylindrical shape, its outer circumferential surface is covered with a heat-shrinkable film 2, and the film 2 is heat-shrinked and wrapped. It is used by drawing out the .

As shown in FIG. 2, when the hollow cord ball 3 is used up to its outermost layer or its vicinity, there is nothing to support that layer, so due to the weight of the cord 1 itself, and due to the bundling. The string layer collapses due to vibrations of the machine and fluctuations in the tensile force of the string 1 being fed out, causing the string 1 to become tangled as shown in Figure 3, resulting in the disadvantage that the string 1 cannot be used until the end. .

As a prior art for solving the above drawbacks, the one described in Japanese Utility Model Publication No. 46-11727 is well known. In this prior art, a string ball whose outermost layer is entirely or partially coated with an adhesive is coated with a heat-shrinkable film.

On the other hand, since the string 1 of the string ball 3 is often made of plastic string, it has a smooth surface without fluff, has high resilience, and does not have any curls. When the string 1 is sequentially drawn out from the inner periphery of the ball, just by applying a slight pulling force to the string 1, the string 1 will actively fly out from the inner periphery of the ball. For example, when this is used in an automatic binding machine, even if the feeding is stopped immediately after feeding to a fixed length, 2 to 3 turns of the spiral ring of string 1, which has been fed out due to inertia and vibration, will separate at the inner circumference of the ball. In some cases, the particles remained and became tangled during the next feeding, making it impossible to tie them together.

As a conventional technique to solve this problem, Jikosho
The one described in Japanese Patent No. 54-30554 is known.

In this prior art, a ball of string is formed into a cylinder by spirally reciprocating a string made of plastic film in the axial direction, and a feed-out regulating plate with a feed-out hole provided in the center is glued to both end surfaces of the cylinder. It was fixed through the layers.

<Problems to be solved by the invention> According to the method described in Utility Model Publication No. 46-11727, the adhesive is applied to the entire or partial outermost layer of the string ball; In this case, a large amount of adhesive is required, resulting in high costs, and there is also a problem in that in the binding machine, the adhesive adhering to the strings becomes "dust" and adheres to the machine, contaminating the machine. Furthermore, depending on the way the adhesive was applied, adjacent strings could be tightly adhered, and several turns could come out at once. In addition, when applying the adhesive partially, as described above, there is a risk that the area where the adhesive is applied will pop out all at once.

Moreover, in the case of twill-wound string balls, as shown in Fig. 2, a space 4 is formed in the same winding layer where the string does not cross the circumference. Adhesive may not be applied to the layer. In such a case, there is a drawback that collapse of the layer near the outermost layer cannot be effectively prevented.

This conventional technique alone cannot prevent the end faces of the string balls from collapsing.

In addition, the product described in the above-mentioned Japanese Utility Model Publication No. 54-30554 has poor manufacturing efficiency because it attaches a feed-out regulating plate to the end face of the string ball via an adhesive layer and then wraps it in a heat shrink film. Moreover, this technique alone could not prevent the outermost layer from collapsing.

<Means for solving the problem> The purpose of the present invention is to provide a string ball for hollowing out which can simultaneously prevent the outermost layer of the string ball from collapsing and prevent the end face of the string ball from collapsing. shall be.

Therefore, the feature is that the string is spirally wound around in the axial direction to form a cylindrical shape, and in the same winding layer, a plurality of spaces where the string does not cross the circumference are formed at predetermined intervals in the circumferential direction. In the string ball for hollowing, which is formed by forming individual string beads and wrapping the end faces and outer peripheral surfaces of the string balls with a heat-shrinkable film, the string ball end face portions on the inner surface of the package in which the string balls are wrapped, and An adhesive is applied to a band-shaped portion of the outer peripheral surface of the string ball on the same inner surface, which has a width larger than the circumferential pitch of the space in the outermost layer of the string ball, and extends over the entire length in the longitudinal direction of the string ball, This adhesive is bonded to the next layer of string from the space in the outermost layer of the string ball.

<Example> Hereinafter, an example of the present invention will be described in detail based on the drawings.

First, the case where the string ball is twilled will be explained.

What is shown in Fig. 4 is an explanatory diagram of twilling.
When the string 1 is reciprocated in the axial direction in a spiral manner with a fairly large lead and wound into a cylindrical shape, it is twill-wound.

Figure 5 is an external view when making 4 reciprocations, and the 6th
The figure shows one layer completely rolled up. As is clear from FIG. 6, in twill winding, there are spaces 4 where the string 1 does not cross the circumference in the same layer.
are formed at predetermined intervals in the circumferential direction and the generatrix direction. FIG. 7 shows the multilayer winding, with the next layer exposed from the space 4.

For example, to form a cylindrical string ball with an outer diameter of the final layer of about 15 cm and a generatrix length of about 25 cm, the wire diameter is about 2.
When a string of mm length is used and the lead is reciprocated in about 21/4 turns from one end to the other end, the spaces 4 are formed at four locations in the circumferential direction and at four locations in the generatrix direction in the same winding layer.

Next, to explain the case of letting out the string 1 from the string ball 3, the string ball 3 shown in FIG. 7 is used by letting out the string 1 from its center until it reaches the next outermost layer. When reaching , the lower string is unwound from the part shown by the virtual circle in FIG. 7, and the outermost layer space 4 is opened one after another. When the layer next to the outermost layer is completely rewound, the space 4 of the outermost layer is completely opened, as shown in FIG. 6, and only the outermost layer remains. As shown in FIG. 5, the outermost layer is also rewound one after another.

In the present invention, when the string 1 is unwound, in particular, when the outermost layer and the next layer are unwound, in order to prevent the layers from collapsing, and during the string unwinding, the end face of the string ball 3 collapses. In order to prevent the string 1 from becoming entangled in the inner hole of the string ball, an adhesive 5 is applied to a predetermined position on the inner surface of the package 2, as shown in FIG.

That is, the end surface portion 6 of the string ball on the inner surface of the package 2 that covers the end surface and the outer circumferential surface of the string ball 3 and the outer circumferential surface portion of the string ball on the same inner surface have a predetermined width L in the circumferential direction, and the string ball An adhesive is applied to a band-shaped portion 7 extending over the entire length of the ball in the longitudinal direction.

This circumferential predetermined width L is slightly larger than the center-to-center pitch l of the space 4, as shown in FIGS. 6, 7, and 9.

Next, a method of applying the adhesive and a method of packaging with a heat shrink film will be explained with reference to FIGS. 10 to 13.

8 is a feed table, and the string ball 3 wound into a cylindrical shape is sequentially fed onto the table 8 by a conveying means (not shown).

Reference numerals 9 and 9 designate rolls of heat-shrinkable film that form the package, and are provided in pairs above and below with the feed table 8 in between. The film 2 fed out from the pair of upper and lower roll bodies 9 passes through the opening 10 of the feed table 8, crosses the feed table 8 vertically, and is fused and integrated near the feed table 8. There is.

Reference numerals 11 and 12 denote adhesive applicators, which are provided as a pair, upper and lower, with the feed table 8 interposed therebetween. The coating devices 11 and 12 include coating rolls 13 and 14.
The film 2 is passed through the rolls 13 and 14.
Apply adhesive 5 to the back side of.

Reference numeral 15 denotes a film cutting device, which has a pair of upper and lower cutting blades 16, 16 connected to the feed table 8.

As shown in FIG. 11, the string ball 3 on the feed table 8 is pressed against the film 2 which is vertically traversing, and the film 2 is pulled out.

The coating rolls 13 and 14 rotate in conjunction with this feeding of the film 2, and the adhesive 5 is coated on the back surface of the film 2. The adhesive 5 is applied to the back surface of the film 2 above the feed table 8 in the state shown in FIG.

That is, the width W of the film 2 is the total length S of the string ball 3.
An adhesive 5 is continuously applied to both end portions R of the film 2 along the longitudinal direction.

An adhesive 5 is applied with a width L so as to connect these end portions R, R. Pitch P of this width L part
is approximately half of the outer circumference length of the string ball 3. The two end portions R, R correspond to the end surface portion 6, and the portion having the width L corresponds to the band portion 7.

The application roll 13 for applying the adhesive 5 to the back surface of the film 2 as described above has a shape as shown in FIG.

On the back side of the film 2 below the feed table 8, adhesive 5 is applied only to both ends R, R of the film 2, as shown in FIG.

As described above, the adhesive is applied to the back side of the film 2, the string ball 3 is pressed from the back side of the film 2 to form a loop, and then the pair of upper and lower cutting blades 16, 16 are cut as shown in FIG. abutting,
The outer peripheral surface of the string ball 3 is covered with a film 2. The cutting blades 16, 16 holding the film 2 therebetween are heated to fuse the film 2 and cut the film 2 as shown in FIG.

Thus, the outer peripheral surface of the string ball 3 is covered with a heat-shrinkable film 2 whose back surface is coated with an adhesive. When this film is heated, it thermally shrinks and becomes a package 2 that covers the outer peripheral surface of the string ball 3 and its end surface.

As shown in FIG. 17, in the package 2, since the adhesive 5 of the end surface portion 6 and the band-shaped portion 7 adheres the string 1 with a predetermined adhesive force, collapse of the outer peripheral layer and the end surface portion is prevented. can.

Moreover, the width L of the adhesive 5 of the band-shaped portion 7 on the outer peripheral surface is:
Since the pitch of the space 4 in the outermost layer of the twill is larger than the pitch 1 of the space 4 in the outermost layer of the twill, the adhesive layer will always close the space 4 even if this band 7 comes to any position on the outer circumference of the string ball 3. , the string 1 of the layer next to the outermost layer can also be securely bonded and held.

As mentioned above, when the package 2 is in the unfolded state,
Since the adhesive is applied to the back surface, the work is easier than applying the adhesive to the inner surface of the bag-shaped or cylindrical package.

Moreover, since adhesive is applied to the end surface of the string ball 3 at the same time so as to hold it, the outer surface and end surface can be treated at the same time.

It should be noted that the present invention is not limited to the above-mentioned embodiments, the coating device below the feed table may be omitted, and the method of packaging with heat shrink film,
And the method of applying the adhesive is not limited to the above. That is, as shown in FIG. 18, for example, the film 2 is shaped into a tunnel by aligning the length of the string ball 3 along the length of the film 2, and the edges are heat-sealed with a center seal 17 for packaging. It's okay. The point is that when the film is flat, adhesive is applied to the back surface of the film in a predetermined shape, and then the film is coated on a cylindrical string ball.

Furthermore, the string balls are not limited to those that are twilled. Further, it is preferable that the position of the band-shaped portion 7 coincides with the printed portion of the film 2.

<Effects of the Invention> According to the present invention, the coating is applied to the outer circumferential surface of the string ball on the inner surface of the package formed by wrapping the string ball, and to the strip-shaped portion extending over the entire length of the string ball in the longitudinal direction, and the space in the outermost layer of the string ball is coated. Because of the adhesive layer that adheres to the next layer of string, there is no need to apply adhesive to the entire outer circumferential surface of the string ball and use a large amount of adhesive. The outermost layer of the string and the next layer of string can be adhesively held and the string ball can be effectively prevented from collapsing, and the width of the adhesive layer of the band-like part is larger than the circumferential pitch of the space in the outermost layer of the string ball. Since the adhesive layer is large, even if the adhesive is applied to any position in the circumferential direction on the inner surface of the package, the adhesive layer will always close the space, and therefore the string of the next layer after the outermost layer will be securely attached. In addition, there is no need to position the adhesive layer of the strip-shaped portion. In addition, an adhesive is applied to the end surface of the string ball on the inner surface of the package in order to prevent the string from collapsing in the outer layer of the string ball and at the same time to hold the end surface of the string ball. Processing can be done simultaneously and manufacturing efficiency is high.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing a string ball for twill binding, Figure 2 is a perspective view of the string ball in Figure 1 used up to the final layer, and Figure 3 is an explanation showing the state in which the string ball has collapsed. figure,
Figure 4 is an explanatory diagram of twilling, Figure 5 is a front view when a part of one layer of twilled string ball is wound, Figure 6 is a front view when it is completely rolled in one layer, and Figure 7 is a multi-layered figure. A front view when rolled up, FIG. 8 is a perspective view of an embodiment of the present invention, FIG. 9 is an explanatory view, FIGS. 10 to 13 are process diagrams of heat shrink film packaging and adhesive application, and FIG. 14 is Figure 15 is a perspective view of the coating roll, Figure 16 is a diagram of the film coated with adhesive, Figure 17 is a cross-sectional view of a ball of string wrapped in heat shrink film, FIG. 18 is a process diagram showing another example. 1... String, 2... Packaging body (heat shrink film),
3... String ball, 5... Adhesive, 6... End face part, 7...
...band.

Claims (1)

[Claims for Utility Model Registration] A string is spirally reciprocated in the axial direction to form a cylindrical shape,
A string ball is formed in the same winding layer and has a plurality of spaces at predetermined intervals in the circumferential direction in which the string does not cross the circumference, and the end face and outer peripheral surface of this string ball are wrapped with a heat shrink film. In the string ball for hollowing out, from the circumferential pitch of the space in the outermost layer of the string ball, which is the end surface portion of the string ball on the inner surface of the package in which the string ball is packaged, and the outer peripheral surface of the string ball on the same inner surface. Adhesive is applied to a band-shaped part that has a large width and extends over the entire length in the longitudinal direction of the string ball, and this adhesive is also bonded to the next layer of string from the space in the outermost layer of the string ball. Features a string ball for hollowing out.