JPH02280751A - Connection of thin plate-shaped rubber thread and connecting equipment - Google Patents

Abstract

PURPOSE:To fix the edge part of a ribbon-shaped rubber thread by rubber paste in simple and speedy manners by observing the behavior of the rubber paste applied at the edge part of the ribbon shaped rubber thread and properly fixing each rubber thread of the ribbon- shaped rubber thread. CONSTITUTION:A cellophane tape 9 is attached onto one surface at the edge part of a ribbon- shaped rubber thread 8 which is formed by temporarily attaching five rubber threads 7, and the other surface is ground so that the top edge 10 has a thin inclination, and an inclined surface 11 is formed, and the inclined surface 11 is inserted and fixed, setting the cellophane tape 9 on the underside, into a fixed groove 2 so as to be positioned at the edge part of a lower press-contact plate 4, passing through the fixed groove 2. Then, an another cellophane tape 9 is attached onto one surface of the edge part of an another ribbon-shaped rubber thread 8', and after an inclined surface 11 is formed by grinding the other surface, the cellophane tape 9 is set onto the underside, and at the position corresponding to the cellophane tape 9 on the lower press-contact plate 4, the inclined surface 11 is inserted into the vicinity of the inlet of the fixed groove 2 of an upper press-contact plate 3 and fixed. Then, the edge part inclined surfaces 11 of the rubber threads 8 and 8' are applied with rubber paste, and the upper press-contact plate 3 is superposed onto the lower press-contact plate 4 and pressed a little, and the rubber threads 8 and 8' are separated from a connecting jig 1. Further, the cellophane tapes 9 on the both surfaces are exfoliated from the rubber threads 8 and 8' and each rubber thread 7 is separated, thus the edge connection of the rubber thread 8 and 8' is completed.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a thin plate-shaped rubber thread that is widely used for fixing to the opening of disposable diapers etc. to impart elasticity to the opening. The present invention relates to a connection method and a connection device used for connection.

(Prior Art) Conventionally, thin plate-like rubber thread (hereinafter simply referred to as rubber thread) is a thin sheet (approximately 0.2 mm thick, although it varies depending on the purpose of use) of what is commonly known as raw rubber, which is made by appropriately vulcanizing natural rubber raw materials. ~Q, 5m
m), pass it through a cutter and cut it to the required width (approximately 0.3-3. (The cut surfaces are attached at an 11 degree angle that can be easily separated by temporarily bonding the sheet back to its original width.) After that, it is separated again into ribbon-like rubber threads of the required width with the number of rubber threads suitable for the toilet purpose. is supplied to consumers.

Consumers impart elasticity to objects by separating each rubber thread from a ribbon-like rubber thread, holding it at a required gap while pulling it, and fixing it to the object with adhesive or the like.

The length of this ribbon-like rubber thread is approximately 4,000 m, so there are manufacturing machines that operate at high speed (for example, in the case of disposable diapers, there are machines that produce 450 particles per minute.If the length of the opening is approximately 1 m, At a speed of approximately 450 m/min), several pieces are used in a day, and the ends must be connected during work.

The methods for connecting these ends are: ① Put both ends of the ribbon-shaped rubber thread together and firmly connect them with rubber glue, and then cut and separate each rubber thread with a suitable blade at the connected part, or ② Ribbon-shaped rubber thread. Separate the end of the ribbon-shaped rubber thread into each rubber thread, then firmly connect the rubber threads at both ends with rubber glue, or Separate the end of the ribbon-shaped rubber thread into each rubber thread, then connect each rubber thread at both ends. It's about tying the .

(Problem to be Solved by the Invention) In the above connection method, in the case of (3), considerable skill is required to cut and separate each rubber thread at the connected part with an appropriate blade, and in case the rubber thread is damaged, If you attach the It is quite a troublesome operation to firmly connect the cylindrical ends so that they are the same length, and as in the case of ■, there is a disadvantage that it takes a considerable amount of time. Since it was cut at that point during the work, it had to be tied into a small knot, but this connection operation also had the disadvantage of taking a considerable amount of time.

Narrow rubber threads are often used in the manufacture of disposable diapers, and the width is often less than 5 mm.
With this narrow width, the connection methods (1) and (2) described above take a very long time, so the connection method (2) is exclusively relied on.

However, even with the connection method (■), it usually takes about 15 minutes for one operation, and as a result, the disposable diaper costs about 870 yen.
Since production will be reduced by 0, it is strongly desired to shorten this connection operation.

(Means for Solving the Problems) The present invention was made by focusing on such a conventional gap point, and by observing the behavior of rubber glue applied to the end of a ribbon-shaped rubber thread. It was discovered that by fixing each rubber thread of the ribbon-like rubber thread appropriately, it is possible to easily and quickly securely connect the ends of the ribbon-like rubber thread with rubber glue, thereby solving the above problem. It aims to solve the problem.

In the present invention, adhesive tape of a required length is pasted on one side of the ends of two ribbon-like rubber threads to which a plurality of cut thin plate-like rubber threads are temporarily bonded, and a thin tip is attached to the other side. After forming an inclined surface by grinding it to have an appropriate inclination, the two inclined surfaces coated with an appropriate rubber paste are joined and pressed together, and then the adhesive tapes on the front and back sides are peeled off, and each of the above-mentioned rubber threads at the connection part is removed. This is a method for connecting thin plate-like rubber threads, which is characterized by separating them.

In addition, the present invention provides an upper and lower pressure diaphragm having fixing grooves in the center into which a ribbon-like rubber thread can be tightly fitted. It is a connecting device that is rotatably held by a mechanism.

(Function) The end portions of both ribbon-like rubber threads can be connected more reliably and in less than half the working time compared to conventional connection methods.

Furthermore, the method of connecting the ends of each of the ribbon-like rubber threads is extremely simple and easy, and can be carried out even by an unskilled general worker.

Furthermore, since the connecting device has a simple structure, it is easy to manufacture and can be provided to customers at low cost.

(Example) The present invention will be described in detail below based on an example shown in FIGS. 1 to 3. 1 has a fixing groove 2 with a rectangular cross-section, which has the same width as the ribbon-like rubber thread to be fixedly connected to the center and has a depth that is either the same as the thickness of the ribbon-like rubber thread or slightly deeper.
This is a connecting device in which lower pressure diaphragms 3 and 4 are rotatably held by a hinge mechanism 6 so that the upper and lower fixing grooves 2 are in accurate contact and the upper and lower contact surfaces 5.5 are in close contact.

As shown in Fig. 2, the thickness is 015 mm and the width is 1 mm.
A cellophane tape 9 of a required length that can be bonded on both sides is pasted on one side of the end of the bond-like rubber thread 8 to which the real rubber thread 7 (7...7.) is temporarily glued and connected firmly. (Figure 2-A
, B, A), and then grind the other side to which cellophane tape 9 is not attached using appropriate sandpaper or the like so that the tip 10 is thin and has an appropriate inclination to form an inclined surface 11 (Fig. 2-A). ,H
After that, put the sellotape 9 on the bottom side and fix the fixing groove 2.
It is inserted into the fixing groove 2 and fixed so that it is located at the end of the lower pressure diaphragm 4 (lower part of the drawing in FIG. 1) through the lower pressure diaphragm 4 (FIG. 2-A, B). (Illustrated by the two-dot chain line in Fig. 1-C) Next, another ribbon-like rubber thread 8 to be connected to the ribbon-like rubber thread 8 is placed on one side of the end portion in the same manner as the ribbon-like rubber thread 8. Attach sellotape 9 of the same length and grind the other side to form the inclined surface 1.
1, the cellophane tape 9 is placed on the lower side, and is inserted into the vicinity of the entrance of the fixing groove 2 of the upper press plate 5 at a position corresponding to the cellophane tape 9 of the lower pressure plate 4 (FIG. 3) and fixed. (1st
(Illustrated with two-dot chain lines in Figure C) Next, apply rubber glue, for example, a Sharpie pound Nc
Apply L221 (trade name of Sharp Chemical Industry Co., Ltd.), leave it for the required time (2 to 5 minutes) to volatilize most of the solvent, then align the upper pressure bonding plate 3 with the lower pressure vibration plate 4 and press it slightly. , the upper pressing plate 3 is separated from the lower pressing plate 4, and both ribbon-shaped rubber threads 8, 8 whose ends are firmly connected are separated from the connecting jig 1.

Furthermore, the cellophane tape 9 on both sides is peeled off from both ribbon-like rubber threads 8°8, and each of the firmly connected rubber threads 71...7S is separated by slightly peeling off the connected parts.
Complete the end connection of the ribbon-like rubber thread 8.8'.

In this case, each rubber thread 71 of both ribbon-like rubber threads 8, 8...
The connection of the ends of 75 is more reliable and can be done in less than half the time compared to conventional connection methods.

The ends of both ribbon-like rubber threads 8.8 can be reliably and quickly connected by attaching Sellotape 9 to one side of both rubber threads 8.8.
In addition to increasing the adhesive strength at the cut surface of 71I and fixing the movement, even if there is a gap between the rubber threads 71...7B, this will prevent air flow. This is to prevent the rubber glue from penetrating into the cut surfaces when applying the rubber glue, thereby preventing adhesion on the cut surfaces of the rubber threads 71...75. In addition, since the end portions of both ribbon-like rubber threads 8, 8 are ground to form an inclined surface 11 after the cellophane tape 9 is attached, gaps may occur in the cut surfaces of each rubber thread 71...75. Even if it is blocked, it has brought good results.

Also, each rubber thread 71 of both ribbon-like rubber threads 8, 8'...
...The method of connecting the ends of the 7s is extremely simple and easy, and can be performed even by an unskilled general worker.

In addition, although the connecting device used is useful, it has a simple structure and can be easily manufactured.

In the above embodiment, five rubber threads 71...75
Although the explanation has been made regarding the fixed connection of the ribbon-like rubber threads 8, 8' to which the rubber threads 7 are temporarily bonded, it goes without saying that the present invention can also be applied to ribbon-like rubber threads having four or less or six or more rubber threads.

Also, double-sided adhesive cellophane tape 9 was pasted on one side of the ends of the ribbon-like rubber threads 8, 8', which fixed each of the temporarily glued rubber threads 71...7B so that they would not move. At the same time, the purpose is to cover the gaps in the cut surfaces of each rubber thread 7B...7S, and if this purpose can be achieved, an appropriate adhesive tape other than Sellotape 9 may be used. Further, depending on the case, a double-sided adhesive tape may be used only on one side.

Also, the ends of both ribbon-shaped rubber threads 8 and 8' were cut with sandpaper to form an inclined surface 11, but this does not increase the thickness so much when the two ribbon-shaped rubber threads 8 and 8 are overlapped. The purpose is to roughen the inclined surface 11 and increase the adhesive strength on the inclined surface 11, and if this purpose can be achieved, the shape of the end portion is not limited to the shape shown in the figure. Furthermore, an appropriate material other than sandpaper may be used.

In addition, fixing grooves 2 that match the width and thickness of the ribbon-like rubber threads 8 and 8 connected to the upper and lower pressure diaphragms 5 and 4 of the connecting device 1 are respectively provided, but instead of providing these fixing grooves 2, A fixing jig provided with the fixing groove 2 may be fitted into a portion where the width and depth of the groove 2 are increased. In this case, one connecting device 1 can connect ribbon-like rubber threads of various widths and thicknesses.

In addition, in order to firmly connect both ribbon-like rubber threads 8, 8', the respective ends of both ribbon-like rubber threads 8, 8' are connected as shown in FIG.
Although it is fixed to the fixing groove 2 at the position shown by the two-dot chain line, if you mark the upper and lower pressure diaphragms 3 and 4 appropriately, for example, by You may also position the section.

(Effect of the invention) Since the present invention has the above configuration, it has the following effects.

(1) Since the ends can be connected quickly, work efficiency can be improved.

(2) Even unskilled workers can easily connect the ends, which helps improve work efficiency.

(3) Although connecting devices are useful, they can be provided to consumers at low prices, contributing to increased sales.

(4) Productivity can be increased by improving work efficiency and workability, contributing to increased corporate profits.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 shows a connecting device, (A) is a plan view, (B) is a side view, f→ is an open plan view, and FIGS. 2 and 5. 2 is a partially cutaway drawing for explaining the tangent method, the bottom of FIG. 2 is a side view, (6) is a front view, and FIG. 5 is another side view. 1... Connecting device 2... Fixing groove 3... Upper pressure diaphragm 4... Lower pressure diaphragm 5, 5... Contact surface 6... Hinge mechanism 7 (71, 7!...・7s)...Thin rubber thread 8.
8'... Ribbon-like rubber thread 9... Sellotape 10... Tip 11... Inclined surface

Claims (1)

[Claims] 1) A plurality of cut thin plate-like rubber threads are temporarily connected to each other.
Adhere a required length of adhesive tape to one side of the end of each ribbon-shaped rubber thread, and grind the tip to form a sloped surface on the other side so that the tip is thin and has an appropriate slope. A method for connecting thin plate-shaped rubber threads, which comprises: joining and press-welding both inclined surfaces coated with glue, and then peeling off the adhesive tapes on the front and back sides to separate the rubber threads at the connection portions. 2) Insert and fix one ribbon-shaped rubber thread into the fixing groove of the lower pressure-welding plate with the adhesive tape facing down, and insert and fix the other ribbon-shaped rubber thread into the fixing groove of the upper pressure-welding plate with the adhesive tape facing down. ,
2. A method for connecting thin plate-shaped rubber threads according to claim 1, characterized in that both inclined surfaces are joined and pressed together using a connecting device. 3) The method for connecting thin plate-like rubber threads according to claim 1 or 2, characterized in that double-sided adhesive cellophane tape is used to fix the ends of the ribbon-like rubber threads. 4) Rotate the upper and lower press-contact plates with a fixing groove in the center into which a ribbon-shaped rubber thread can be tightly fitted, using a hinge mechanism so that the upper and lower fixing grooves are in precise contact and the upper and lower contact surfaces are in close contact. A movably held connecting device. 5) The connecting device according to claim 2, further comprising upper and lower press-contact plates into which fixing jigs with fixing grooves are fitted.