JPS61124713A - Connecting fastener - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application of the Invention) The present invention provides a method for manufacturing a large number of fasteners each having a protruding sharp portion at the tip of the shaft and a head at the base end so that the fasteners are parallel to each other. The present invention relates to connecting fasteners that are arranged and connected to each other.

(Background Art and its Problems) In a connecting fastener in which a large number of fasteners, such as nails or staples, are arranged and connected so that their shaft portions are parallel to each other on a plane, plastic adhesive is generally used as a means of connection. It is used in many ways. These connecting fasteners are loaded into a nail gun or the like in a connected state, and the leading one is separated from the connected body and driven out by a power driving driver.

In addition to the ability to cut, the ability to cut the adhesive layer of the plastic connecting body is required. Generally, this adhesive layer is hard and has a large bonding force, so it requires a device with a considerable ability to cut it, which has the disadvantage of increasing the size of the nailing machine.

In addition, depending on the type of adhesive, the surface of the cured adhesive layer has self-adhesive properties, which may cause connecting fasteners to stick together during the manufacturing process or inside the packaging container, making it difficult to remove the adhesive from the container or device. have.

(Object of the Invention) The present invention has been proposed in view of the above-mentioned conventional situation, and provides a connection that not only provides a highly reliable connection state but also allows easy separation of a driving fastener and a fastener connection group during fastener driving. The purpose is to provide fasteners. Furthermore, it is an object of the present invention to provide an adhesive layer that connects a large number of fasteners with high adhesiveness, but does not inadvertently bond to other connecting fasteners, etc., and achieves a stable adhesive state. be.

(Summary of the Invention) ゛ The present invention provides a structure in which a large number of fasteners are arranged and connected in parallel with each other and the axial height positions of adjacent fasteners are sequentially displaced in a stepwise manner, and in which are adhesively connected by a first layer made of a thermoplastic resin, and the outer surface of the first layer is covered with a second layer made of a non-self-adhesive resin. In particular, adhesive bonding between individual fasteners constituting diagonal connecting fasteners is achieved mainly by the first layer of the adhesive layer, and other connecting fasteners, etc. The outer surface of the first layer is covered with a non-self-adhesive second layer to prevent inadvertent adhesion with the first layer.

(Example) An embodiment of the present invention will be described with reference to the drawings.

Fig. 1 is an external perspective view showing an example of the connecting fastener of the present invention, Fig. 2 is a partially enlarged cross-sectional view of Fig. 1, and Fig. 3 is a partially enlarged cross-sectional view of Fig. 2 showing another example. 4 is a partially enlarged cross-sectional view of FIG. 2 showing still another example.

First, as is clear from FIG. 1, the connecting fastener 1 is
A large number of fasteners 2 are arranged parallel to each other, and the fasteners 2 are arranged so that the height positions of adjacent fasteners 2 in the axial direction are sequentially shifted in a stepwise manner. In the illustrated case, each fastener 2 has a sharp part 21 protruding from the tip of the shaft 20, and a head 22 bulging from the base end so as to protrude in the left-right direction of the shaft 20. has been done.

The adjacent fasteners 2 are brought into contact with each other at one side of the head 22 and the shaft 20, and each fastener is placed in a state in which the height position is shifted one after another. arranged diagonally.

Furthermore, as is clear from FIG. 2, each fastener 2 of the connecting fastener 1 is coated with an adhesive layer 23 from the outer periphery of the group of fasteners arranged as described above, whereby the entire fasteners 2 are connected in series. ing. Note that the adhesive layer 23
a first layer 24 applied to the outer surface of each fastener 2;
The first layer 24 is made of a thermoplastic resin, such as 2) IJ rubber-based resin, etc. The second layer 25 is made of a non-self-adhesive material, such as a nitrocellulose resin.

Here, the cross-sectional shape of each fastener 2 is further detailed. A base material such as a wire rod having a circular cross section is cut and press-worked so that both left and right sides 26 and 27 are chamfered, and both front and rear sides 28 and 29 are chamfered. The circular bulge shape of the base material is left as it is, and four adjacent fasteners are brought into contact with each other at 28.degree. Therefore, on both sides between each fastener 2.2 of the connecting fastener 1, a long groove 30 having a V-shaped cross section and surrounded by the circular bulges of each shaft portion 20.20 on both sides extends in the axial direction. The adhesive layer 23 also has these long grooves 30.
A V-shaped long groove 30A is formed following the figure.

The first layer 24 of the adhesive layer 23 made of thermoplastic resin is plasticized by heating and has excellent self-adhesiveness and extensibility, and reliably adhesively connects each fastener 2. However, if this first layer 24 directly faces the outer surface and touches other connecting fasteners, magazine inner walls, etc., it has the above-mentioned self-adhesion and extensibility, so there is a risk that it will inadvertently adhere to these. . However, in the configuration of the adhesive layer 23 of the present invention,
Since the outer surface of the first layer 24 is covered with a second layer 25 made of a non-self-adhesive material, such as a nitrocellulose resin, the occurrence of the above-mentioned inadvertent adhesion can be prevented. In addition, when this second layer 25 is formed as a strong layer such as a nitrocellulose resin as in the above-mentioned embodiment, a large force is required to separate the driven fastener from the other connected fastener groups when driving the fastener. If the shaft portion of the fastener has a small diameter, there is a risk that the fastener will be deformed, which may hinder accurate driving.

Therefore, if the adhesive layer 23 is formed as in the other embodiment shown in FIG. 3 or 4, the above problem can be easily avoided.

That is, in the embodiment shown in FIG.
If a weak part such as a crack 31 is formed in part A, it can be easily separated from the part.

Further, in the embodiment shown in FIG. 4, the first layer 2 of the adhesive layer 23
4 is formed in the same manner as in each of the embodiments shown in FIGS. The portion of the layer 24 corresponding to the V-shaped long groove 30A is left as is;
It is coated only on the outer surface portion 24A of the first layer 24 located between the letter-shaped long grooves 30A, 30A, that is, the bulging portions of the first layer 24 corresponding to both left and right side surfaces 26 and 27 of each of the fasteners 2. It was designed so that it could be formed. If formed in this way, since the adhesive layer 23 is formed only by the first layer 24 between each fastener 2, this portion becomes fragile.

In addition, since the second layer 25 sufficiently covers the outwardly bulging portion of the first layer 24, that is, the portion that is likely to come into contact with other connecting fasteners, etc., inadvertent adhesion may occur. can be sufficiently avoided.

(Effects of the Invention) In the present invention, the adhesive layer applied to connect and fix each of the above-mentioned fasteners covers the first layer formed of thermoplastic resin and the outer surface of this first layer. Since it has a two-layer structure with a second layer made of a non-self-adhesive material that is applied like this, the first layer made of thermoplastic resin is not exposed on the surface of the connecting fastener body, and therefore the packaging This eliminates the possibility that the connected fastener bodies in the container and in the fastener storage magazine of a nailer or the like will stick together and impair the removal of the connected fastener from the container. Further, since the fragile layer is provided between each fastener axis of the connecting fastener, each fastener can be easily separated when driving the fastener with a nailer (not shown).

[Brief explanation of drawings]

Fig. 1 is an external perspective view of the connecting fastener, Fig. 2 is a partially enlarged cross-sectional view of Fig. 1, Fig. 3 is a partially enlarged cross-sectional view of Fig. 2 showing another example, and Fig. 4 is a partially enlarged cross-sectional view of Fig. 2. FIG. 3 is a partially enlarged cross-sectional view of FIG. 2 showing still another example.

Claims (1)

[Claims] 1) In an arrangement in which a large number of fasteners are arranged and connected in parallel to each other and the axial height positions of adjacent fasteners are sequentially displaced in a stepwise manner, the distance between each of the adjacent fasteners is A connecting fastener characterized in that the first layer is adhesively connected to the first layer made of a thermoplastic resin, and the outer surface of the first layer is covered with a second layer made of a non-self-adhesive resin. 2) In a case where a large number of fasteners are arranged and connected in parallel and adjacent to each other, a first layer made of thermoplastic resin is connected between each of the adjacent fasteners, and a layer is formed from the outer surface of the first layer. A connected fastener characterized in that the fasteners are adhesively connected by an adhesive layer coated with a second layer made of a nitrocellulose resin, and a fragile layer is disposed between each of the fasteners in the adhesive layer.