JPH07251805A - Manufacture of shaft-shaped fastener connection body - Google Patents

Abstract

PURPOSE:To prevent buckling and rupture of a tape in a shaft-shaped fastener connection body wherein a shaft-shaped fastener of a screw or the like for use in an automatic screw fastening machine is bonded to the tape through adhesives. CONSTITUTION:A hot-melt type adhesive 12 is applied to a tape 11 and shanks of screws 13, 13,... are bonded to the tape at regular intervals. The adhesive 12 is pressed and cut, on the opposite sides of each of the screw, by means of a hot plate processing device 15 into blocks, so that the block of adhesive 12 is provided for each of the screws. During the time when the screws are driven by an automatic screw fastening machine, each of the blocks of adhesive 12 is separated independently together with each of the screws 13, 13, so that excessively large stresses are not generated in the tape 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a shaft-shaped fastener connecting body in which shaft-shaped fasteners such as screws and nails used in automatic screw-fastening machines and nail-driving machines are connected by a tape, The present invention relates to a method for manufacturing a shaft-shaped fastener connected body in which a shaft-shaped fastener and a tape are bonded together with an adhesive.

[0002]

2. Description of the Related Art Conventionally, a shaft fastener coupling body in which shaft fasteners such as screws and nails are connected is housed in a magazine of an automatic screw tightening machine or an automatic nailing machine to continuously perform screw tightening work and nailing work. It is known to be able to do so. As shown in FIG. 5, in this type of axial fastener coupling body 1, after hot-melt adhesive 3 is applied to one surface of tape 2 of paper or plastic film, screws 4, 4 ... Or nails are heated. The tape 2 is pressed against the adhesive layer in a posture perpendicular to the longitudinal direction of the tape 2, and the screws 4, 4, ... Are arranged at regular intervals.

During screwing work or nailing work, the shaft-shaped fastener connecting body 1 is sequentially withdrawn from the magazine, and the shaft-shaped fastener hit by a driver such as a screw tightener moves in the axial direction to reach the object. Be driven in. At this time, the hot melt type adhesive in the portion where the hit shaft-shaped fastener is adhered is torn from the peripheral hot melt-type adhesive, peeled from the tape together with the shaft-shaped fastener, and is driven into the object. Further, the tape is ejected from a tape ejection port such as a nailing machine.

[0004]

A conventional axial fastener coupling body using a hot-melt type adhesive has an axial shape because the hot-melt type adhesive has a certain degree of flexibility and stretchability. When the fastener is driven, the adhesive layer is less likely to break, and the tape may buckle or the edge may be torn, resulting in defective feeding of the tape. Further, the fracture position of the adhesive that is peeled off along with the screw to be driven is unstable, and the screw in the next row may also be peeled off from the tape at the same time and the work may be interrupted. Further, when the amount of the adhesive that is driven into the object together with the screw or the like is too large, the adhesive is exposed at the peripheral portion of the head of the driven shaft-shaped fastener, which spoils the appearance.

Therefore, the peeling of the shaft-shaped fastener from the tape is facilitated to prevent the occurrence of defective feeding to eliminate the fear of lowering the work efficiency, and the amount of the adhesive to be peeled off together with the shaft-shaped fastener is kept constant. A technical problem to be solved in order to improve the finished quality arises, and an object of the present invention is to solve the above problem.

[0006]

SUMMARY OF THE INVENTION The present invention is proposed to solve the above-mentioned problems, and a hot-melt adhesive is applied to one surface of a long tape to form a shaft-shaped fastener such as a screw or a nail. Is adhered to the hot melt adhesive in a posture that is orthogonal or inclined to the longitudinal direction of the tape, and axial fasteners are arranged continuously at regular intervals in the longitudinal direction of the tape, and the adhered axial fasteners A hot plate is formed by pressing a hot plate against the hot melt adhesive between the hot melt adhesive and cutting the hot melt adhesive layer in the longitudinal direction of the tape with the hot plate to form a fastener assembly connected to a nailer. A method for manufacturing a fastener assembly is provided.

[0007]

[Function] A hot-melt type adhesive layer is provided between the shaft portions of the respective axial fasteners while the axial fasteners such as heated screws are adhered to the tape having one side coated with the hot-melt type adhesive at regular intervals. When pressed in parallel with the shaft portion of the fastener, the hot-melt adhesive is locally melted by the heat of the hot plate and pushed off. The hot plate pressed against the tape comes into contact with the surface of the tape and stops, so that the tape is not damaged. After the hot plate is separated from the tape and the hot melt adhesive radiates heat and cures, the hot melt adhesive is divided into blocks for each axial fastener by the groove formed by the hot plate. The body is created.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for manufacturing a shaft-shaped fastener assembly used in an automatic screw tightening machine will be described below with reference to FIG.
4 to 4 will be described in detail. First, as shown in FIG. 1, a hot-melt adhesive 12 is applied to one surface of a tape 11 such as a paper having high tear strength such as kraft paper or a polyethylene film by an applicator to solidify,
The screws 13 and 1 in a posture orthogonal to the longitudinal direction of the tape 11
The shaft portions of 3, ... Are adhered to the hot melt type adhesive 12, and the screws 13, 13 ,.

The coating thickness of the hot melt adhesive 12 is
The thickness of the screw 13 to be adhered is made substantially equal to the depth of the screw groove, and the screws 13, 13, ... Are heated and pressed against the surface of the hot-melt adhesive 12, so that the screws 13, 13,
The hot-melt type adhesive 12 melted by the heat of ... flows into the screw grooves of the screws 13, 13 ,. The heat of the screws 13, 13, ... Is radiated, and the hot-melt adhesive 12 is cured, so that the screws 13, 13 ,.
Then, the same axial fastener coupling body 14 as that shown in FIG. 5 is prepared as a conventional example.

Then, hot plate processing is performed on the axial fastener connecting body 14. As shown in FIG. 2, the hot plate 17 is heated by electricity while sequentially moving the axial fastener coupling body 14 along the upper surface of the base 16 of the hot plate processing device 15.
Is moved up and down to locally melt and push the hot melt adhesive 12. The heat plate 17 is wider than the width of the tape 11,
The hot melt adhesive 12 is divided over the entire width of the tape 11 and pressed against the surface of the tape 11 to stop descending. It is preferable to provide a coating layer of Teflon or the like on the surface of the heating plate 17 to prevent the hot melt adhesive 12 from adhering.

Ascending and descending of the heating plate 17 is sequentially controlled by means such as numerical control and tape feed amount detection sensor, and as shown in FIG. 3, grooves S, S, ... Are formed on the left and right sides of the screws 13, 13 ,. Then, the hot melt adhesive 12 is divided. The shaft-shaped fastener coupling body 14 thus produced is the hot-melt adhesive 1 for holding the screws 13, 13, ....
Since 2, 12, ... Are separated into blocks,
During the screwing operation, for example, the screw 13 at the left end in FIG.
a is hit by a driver and the hot-melt type adhesive 12a at the portion where the screw 13a is adhered is the tape 1
When peeled from 1, the hot melt adhesives 12, 12, ... Of the other blocks can be easily peeled without simultaneously pulling.

FIG. 4 shows another embodiment of the tape 1
The hot-melt adhesive 12 coated on one side of No. 1 was first applied to the hot plate processing device 15 to divide the hot-melt adhesive layer 12 at equal intervals in the longitudinal direction, to form horizontal stripes, and then heated. The screws 13, 13, ... Are bonded together. Grooves S that divide the hot melt adhesive 12
By setting the interval of S, ... to be smaller than the outer diameter of the screw 13, the screws 13, 13 ,.

When a cutter is used as a means for cutting the hot-melt type adhesive layer, it is not easy to stably control the driving depth, and when the driving depth is insufficient, the hot-melt type adhesive is cut. The adhesive is not divided and has no effect. On the other hand, if the driving depth is too large, the tape is damaged and the strength against bending stress and the like is remarkably reduced, causing problems such as deformation of the tape. On the other hand, the processing using the hot plate of the present invention has an advantage that the processing is easy and the quality is extremely stable because only the hot melt adhesive is melted and the tape is not damaged at all.

Further, instead of the above-mentioned screw 13, the tape 1
It is possible to easily provide a fastener connecting body for a nail driving machine by adhering a nail to 1. And, of course, the present invention extends to those modifications.

[0015]

As described in detail in the above one embodiment, the present invention divides the hot melt adhesive applied to the tape by the hot plate to bond each axial fastener to the hot melt adhesive. The agent is divided into blocks. Therefore, only the hot-melt type adhesive block of the block is peeled off from the tape together with the fastener driven during the fastener driving operation, so that other axial fasteners may be peeled off at the same time or excessive buckling stress may be applied to the tape. There is no problem, and it is possible to prevent the occurrence of defective fastener feeding due to deformation of the tape or dropping of the next row of fasteners.
Improves stability and reliability.

Further, the flexibility of the axial fastener coupling body is improved, cracking of the hot-melt type adhesive layer in a low temperature atmosphere can be prevented, and the axial fastener does not fall off accidentally. In addition, since the amount of adhesive that is peeled off together with the axial fastener that is driven in is controlled to be constant, it is possible to prevent the adhesive from being exposed at the peripheral edge of the head of the fastener that is driven in, and improve the finished quality. Exert the effect of.

[Brief description of drawings]

FIG. 1 is an explanatory view of a process of adhering a shaft-shaped fastener to a tape according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a process of dividing the hot melt type adhesive layer.

FIG. 3 is a front view of the produced axial fastener coupling body.

4A and 4B show another embodiment, FIG. 4A is a plan view of a shaft-shaped fastener coupling body, and FIG.

5A and 5B show a conventional example, FIG. 5A is a plan view of a shaft-shaped fastener coupling body, and FIG.

[Explanation of symbols]

 11 Tape 12 Hot Melt Type Adhesive 13 Screw 14 Axial Fastener Connection 15 Hot Plate Processing Device 16 Base 17 Hot Plate S Groove

Claims (1)

[Claims] 1. A hot-melt adhesive is applied to one surface of a long tape, and a shaft-shaped fastener such as a screw or nail is bonded to the hot-melt adhesive in a posture orthogonal or inclined to the longitudinal direction of the tape. Then, while arranging the axial fasteners continuously at a constant interval in the longitudinal direction of the tape, the hot plate is pressed against the hot-melt type adhesive between the adhered axial fasteners, and the hot plate is hot melted. 1. A method for manufacturing a shaft-shaped fastener connected body, comprising cutting a die adhesive layer in the longitudinal direction of a tape to form a shaft-shaped fastener connected body used in a nailing machine or the like.