JPH058334Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an improvement in a hook head made by bonding a caulking member to a head body made of thermosetting synthetic resin.

(Prior art) A hook head made of thermosetting synthetic resin generally combines a head body and a crimping member, but unlike the case of thermoplastic synthetic resin, the crimping member is insert-molded into the head body. Since this is not possible, the head body and the caulking member are fixed by adhesive or enclosing fixing means, and most of them have an adhesive structure with high connection reliability.

The hook head connected in this way connects the caulking leg of the caulking member to the attachment member such as fabric,
It is used to form a button body by passing it through one of the male hooks and crimping it.

As shown in FIG. 4, a conventional example of a hook head employing the above-mentioned adhesive means includes a seat plate 5 of a caulking member 2 in a depressed state in the center of a head body 1 made of thermosetting synthetic resin. After applying adhesive 4 to the counterbore-shaped hole 3 opened for bonding, the seat plate 5 of the caulking member 2, which has a caulking leg 6 protruding from the center of the disk-shaped or umbrella-shaped seat plate 5, is pressed. Hook heads of integrally adhesive construction are known.

(Problem to be solved by the invention) However, since the seat plate 5 of the caulking member 2 is horizontal or has an umbrella shape with the peripheral edge downward, it is difficult to press it against the bottom surface of the spot facing hole 3 coated with the adhesive 4. Then, when the seat plate 5 is horizontal, the adhesive 4 does not form a pool between the adhesive surfaces, and the adhesive 4 covers the surrounding area and the caulking leg 6.
As the adhesive 4 is forced out into the hollow part, the mutual adhesive strength becomes weak. In addition, in the case of an umbrella-shaped seat plate 5, the adhesive 4 is mainly forced out towards the center, which causes the adhesive 4 to be pushed out into the hollow part of the caulking leg 6. As the material enters and rises to form a partially solid state (see Figure 4), it not only frequently produces defective products, but also makes crimping work difficult, and moreover, reliable crimping cannot be expected. It was hot.

The present invention focuses on the above-mentioned problems, and not only strengthens the adhesive bond between the head body and the caulking member, but also prevents the adhesive from entering and rising into the hollow part of the caulking leg.
To provide a hook head that allows easy and reliable crimping work on male and female hooks, etc.

(Means for Solving the Problems) The present invention provides a counterbore-like hole for adhering the seat plate of the caulking member in a recessed state in the center of the head body made of thermosetting synthetic resin, and At the hook head, a seat plate of a caulking member with a protruding caulking leg protruding from the center is glued into the hole using an adhesive, and a counterbored hole is formed in the back surface of the boundary where the caulking leg and the seat plate are continuous. The above object is achieved by providing a bulging bent portion in contact with the bottom surface of the seat plate, and an annular raised portion continuous to the bulging bent portion on the seat plate.

(Example) Next, an example of the hook head of the present invention will be described below based on the drawings.

Figure 1 is an exploded sectional view of the hook head of the present invention, Figure 2
The figure is a cross-sectional view of the assembled state, and FIG. 3 is a cross-sectional view of the case when the female hook is caulked. A counterbored hole 3 opened to bond the seat plate 5 of No. 2 in a recessed state.
The structure in which the seat plate 5 of the caulking member 2 with the caulking leg 6 protruding from the center of the seat plate 5 is bonded using adhesive 4 is the same as that of the conventional hook head.

The hook head of the present invention is characterized by the seat plate 5 of the caulking member 2, and there is a counterbored hole 3 on the back side of the boundary where the metal cylindrical caulking leg 6 and the seat plate 5 are continuous. A bulging bent portion 7 in contact with the bottom surface is formed in an annular shape, and an annular raised portion 8 is formed on the seat plate 5 in succession to the bulging bent portion 7. .

The caulking member 2 configured in this way is arranged by injecting and spreading an appropriate amount of epoxy resin adhesive 4 into the counterbore-shaped hole 5 of the head body 1, and then inserting it into the counterbore-shaped hole 5. At this time, the bulging bent portion 7 of the caulking member 2 is adhered in a state in which it is pressed against the bottom of the counterbore hole 3.

In this case, the bonding between the two is mainly performed using adhesive within the annular raised portion 8, the space around the seat plate 5, and the annular space formed by the inner wall surface of the counterbore hole 5 and the outer peripheral surface of the annular raised portion 8. As shown in FIG.
is passed through an attachment member 9 such as cloth and either a female or male hook (female hook 10 in the figure) and the caulking leg 6 is caulked to form a button body.

(Effects of the invention) As described above, the seat plate of the caulking member is inserted into the center of the head body made of thermosetting synthetic resin in the counterbored hole that is made for adhering the seat plate in a recessed state. In a hook head in which a seat plate of a caulking member with protruding legs is bonded using an adhesive, the caulking member is attached to the back surface of the boundary where the caulking leg and the seat plate are continuous, with a bulge in contact with the bottom of the counterbored hole. Since the seat plate has an annular protuberance formed on the seat plate, the caulking member is inserted into the counterbore-shaped hole coated with adhesive. When the seat plate is inserted and pressed, the bulging bent portion comes into pressure contact with the bottom of the counterbore hole and acts to prevent the adhesive around it from entering the hollow portion of the caulking leg. hand,
Unlike conventional methods, a part of the crimping leg becomes solid and a defective product is not formed, which hinders crimping, and the head body and the crimping member are bonded and fixed without any hindrance to crimping. .

In addition, the annular raised part not only reinforces the seat plate, but also
A pool of adhesive is formed within the annular protuberance to increase the bonding area with the bottom of the spot-bore hole, and the adhesive pushed out from around the seat board fills the gap around the seat board and the inner wall surface of the spot-bore hole. Since the head body and the caulking member are solidified between the annular protrusion and the annular protuberance, the adhesive fixation between the head body and the caulking member becomes reliable and strong, and there is no inconvenience caused by inadvertent separation of the two.

Therefore, according to the present invention, the adhesive connection between the head body and the crimping member is strengthened, and the adhesive is prevented from entering and rising into the hollow part of the crimping leg, thereby simplifying the crimping work for male and female hooks, etc. Moreover, it is possible to provide a hook head that can be made reliable.

[Brief explanation of the drawing]

Figure 1 is an exploded sectional view of the hook head of the present invention, Figure 2
The figure is a cross-sectional view of the assembled state, FIG. 3 is a cross-sectional view of the hook secured to the female hook by caulking, and FIG. 4 is a cross-sectional view of a conventional hook head. DESCRIPTION OF SYMBOLS 1... Head main body, 2... Caulking member, 3... Spot facing hole, 4... Adhesive, 5... Seat plate, 6... Caulking leg, 7... Bulging bent portion, 8... ...annular ridge,
9...Mounting member, 10...Female hook.

Claims (1)

[Scope of utility model registration request] A hook head in which a base plate of a crimping member having a crimping leg protruding from its center is bonded with an adhesive into a countersunk hole opened in the center of a head body made of thermosetting synthetic resin for bonding the base plate of the crimping member in a recessed state, the hook head being characterized in that the crimping member has a bulging bent portion formed on the back side of the boundary where the crimping leg and the base plate are connected, the bulging bent portion being in contact with the bottom surface of the countersunk hole, and the base plate has an annular protrusion formed continuous with the bulging bent portion.