JPS5820339A - Manufacture of stapler needle - Google Patents

Abstract

PURPOSE:To bind soft, bulky material without breaking the surface by disposing stapler needles in series to form a block and applying heat treatment on the legs and thereby softening the structure between the tips of the legs and the back. CONSTITUTION:A stapler needle 1 is formed by bending a rigid metallic sheet of small width and providing leg parts 2, 3 and back 4. The stapler needles are disposed in series in the same direction and laminated. At the same time, they are bonded with a bonding agent to form a block A. Then, the block A is inserted into a heating device 8 consisting of a insulator 6 and a coil 7. The DELTAH parts of the stapler needles are heated by energizing the coil 7 and then air cooled. The structure of DELTAH part which is between the tips of the legs 2, 3 and the back is made softer than other parts.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method of physically bonding two or more layers of soft bulky material such as fiberboard, plasterra, or foam board to the back side of a surface material without penetrating the surface material. The present invention relates to a method for manufacturing staples useful for.

For example, Shio rock wool with a thickness of 10 cm and a density of 430.
Alternatively, a method of integrally forming two or more layers of asbestos and glass fiber-containing resin foam of appropriate thickness and density includes:
There are only three methods: using adhesive, ◎physical bonding, or heat fusion. but.

Method (2) not only requires a huge amount of laminate because of its bulk, but also has the disadvantage that it does not provide much strength.

In addition, there are two methods for the ◎ method: stapling and sewing, but the former has the disadvantage that the legs break through the surface material because the strength against bending is the same. On the other hand,
In the latter case, it is possible to take out the bulky material and combine the two layers, but it is not possible to laminate another layer on top of the one layer filled with the surface material and to integrate it without breaking through (penetrating) the surface material. cannot be combined. Furthermore, this method is not possible except for specific plastic forms, and even if it were actually integrated, it had the disadvantage of lacking bonding strength.

The present invention proposes a stapler in which weak points are formed in the bending strength of the legs of the stapler using a special method. In other words, when a stapler collides with the back side of a thin metal plate (surface material) such as a colored galvanized iron plate, the stapler will not penetrate the surface material even if the wedge-shaped tips of the legs are perpendicular to the thin metal plate. This is a method of manufacturing staples in which a weak point is formed by thermal treatment at a position separated by the bending allowance from the tip toward the back so that the stapler can be bent in either the up, down, left, or right direction.

Below, the manufacturing method of the stapler according to the present invention will be explained in detail with reference to the drawings.
1 is formed by bending a narrow and rigid non-metal plate with a stapler to form an n-shaped cross section, and forming two legs 2.3 and a back 4.
and a weak point 5 are provided. Also, the tip of the 10 legs,
Especially the width! At either end in the direction or thickness t- direction, when the legs 2 and 3 collide with a thin metal plate to be described later, the collision force is immediately reduced by the busy slope and penetrates the thin metal plate. A wedge-shaped KIE is formed so that it escapes in any direction, such as front and back or left and right, without moving. Further, the weak point portion 5 is formed in the metal structure that is the weakest against bending in the leg portion 2.3. In other words, it is a portion that does not bend even if it passes through a fiberboard body or the like, but is bent when it collides with a hard member such as a metal plate. As a specific example, as shown in FIG.
Heat treatment is applied to the weak point part 5 consisting of the base material (3) to make the core part a softer metal structure than the other parts of the leg part 2.3. 5 is to form it so that it has enough strength to bend. To further explain, the material of the stapler is hard steel or mild steel, and k, which forms the weak point 5, is softened by annealing within the range △H. The temperature is as high as 850C, and after heating, it is gradually cooled by air cooling. Note that the heating method is performed using high frequency waves, microwaves, or laser beams in order to heat only a small area. Preferably, areas other than the %H range are masked with an insulating paint or a heat reflective material. In addition, the total height H of the stapler 1 is the thickness of the laminated fiber boards, etc., plus the above bending allowance, the width l is 0.5 to 5 cm, and the thickness t is 0.2 to 2 s + m. The length W of the back part 3 is about 7 to 50 degrees.

Next, a method for manufacturing a stapler according to the present invention will be explained. First, start with a stapler L of 10 as shown in Figure 1.
As shown in Figure 2, a block A made up of 0 wires is insulator t = 0.7 dew,! ;If 2 simple, α=1
5, β=2wa, r=25m, carp 7 is a device capable of high frequency heating. Then, energize the '-I file 7 and apply approximately 85
Heat at 0C for 30 seconds, then heat block A with heating device 8.
It was taken out and air cooled for about 10 hours. At this time, the room temperature is approximately 2
It was 5C. So, block A of this stapler
P=150~2 as shown in Figure 3 (→) with a stapler.
When pouring at 00u, the weak point 5 bends as shown in Figure 3, joining the fiberboard bodies B and B, and the surface material C1, for example, a colored galvanized iron plate (0.27m5+), functions as a stand. Of course, no phenomenon of penetrating the colored galvanized iron plate was observed at all.In addition, the dimensions of the stapler L are W=101EII and H=22I in Fig. 1 (a).
III% J = 0.7 proverbs, h = 5 proverbs, t = 0
．． 5 ws, i-mei-△II = 2 wx, two 10 tg thick rock wool plates (density 430 kit) are laminated and bonded, surface material C and rock Wool board B is glued with adhesive 9. As a result, the bonding force between the fiber laminations formed in this way is as follows: 1&9 when using adhesive
Moreover, there was no cohesive failure or interfacial failure that occurs when adhesives are used, and the bond was secure. Note that the bent portion may be deformed and connected as shown in FIGS. 4(a) to (e) depending on the shape of the tip of the stapler and the position of the weak point, and as described above, the stapler forming method according to the present invention There are features that allow it. Additionally, since there are no notches in the middle of the leg, there is no stress concentration, and the breaking strength at the bent part is much stronger than mechanically cut staples. There are 9 Sarak,
It has the feature that the strength of the weak point can be changed arbitrarily depending on the heating temperature and time.

Figure 1 (→, () is an explanatory diagram showing a stapler manufactured by the manufacturing method according to the present invention, Figure 2 is an explanatory diagram showing a part of the manufacturing process of the stapler according to the present invention, 3k), (11 is a stapler manufactured by the manufacturing method according to the present invention.

106. stapler, 500 weak point section.

Figure 1 (- Figure 2 Figure 3 (&) Figure 4 (=)' (b) (a) (d)
(e)

Claims (1)

[Claims] (1) In a metal stapler that is bent into an n-shaped cross section and has two legs and one back, and has an acute angle at the tip of the leg, the staples are arranged in the same direction k and in series. A stapler block is formed by laminating them together and fixing them with adhesive, and then heat-treating only a small linear region of the block halfway from the tip of the leg to the back. A method for producing a stapler characterized by softening the partial tissue.