JPH11325025A - Bayonet point bolt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily bore a hole on a roof material with small force by providing a slant section having a tapered diameter between a screw section and a bayonet point section, and providing a rod-like section having the same diameter as the uppermost section of the slant section. SOLUTION: A slant section 4 located at the upper section of a screw section 2 and gradually tapered in diameter toward the tip of a screw section 2 is formed between the screw section 2 and a bayonet point section 3, a rod-like section 5 is provided above the slant section 4, and the rod-like section 5 is made equal in diameter to the uppermost section of the slant section 4. A shank 6 is formed between a head section 1 and the screw section 2, and this bayonet point bolt can be fixed on a tight frame. When a roof material is to be hit and bored with a hole, the hole can be bored easily with small force. The roof material is kept in contact with a protruded section, and the hole can be prevented from being enlarged more than necessary.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sword bolt that can be suitably used for fixing a roofing material on a tight frame.

[0002]

2. Description of the Related Art A sword bolt used for attaching to the top of a tight frame and fixing a roof material, etc., generally comprises a head, a screw portion and a sword tip. To fix the roofing material to the tight frame using the sword bolt, smash the roofing material laid above the swording bolt with a hammer from above the swording point of the swording bolt using a punching tool. Later it must be tightened with nuts.

[0003] Since most of these operations are performed manually, and most of the time, the operations are performed at high altitudes. Therefore, in terms of safety and efficiency, the operations can be performed safely and easily, and the roof material is firmly fixed. Sword bolts that can be used have been developed.

For example, Japanese Patent Application Laid-Open No. Hei 8-170407 proposes a tight frame bolt in which a bar-like portion having a diameter smaller than the inner diameter of a nut screwed into the screw portion protrudes from the tip of the screw portion. . The rod-shaped portion is provided for easily and accurately screwing the nut onto the bolt when fixing the roof portion with the nut.

In Japanese Patent Application Laid-Open No. 10-73112,
There has been proposed a three-step sword-point bolt provided with a downwardly projecting portion above a screw portion, an inclined portion whose diameter gradually decreases as going upward, and an upwardly projecting portion. This is a shape for reducing the resistance and reducing the tapping force when the roof portion is banged and pierced using a hole punch and fixed.

[0006]

However, there have been various problems with the shapes of the pointed bolts proposed so far as represented above. In other words, it is meaningful to form a certain spacer portion such as a rod portion between the sword portion and the screw portion in consideration of workability such as fastening with a nut, but since the rod portion is formed, A protruding portion will be formed between the screw portion and the sword tip portion. If there is a protruding part in this part, when the roof material is hit and a hole is drilled, the roof part will hit the protruding part, and the formed hole will be deformed, cracks and breaks around the formed hole In some cases, or the hole became unnecessarily large. Since such cracks and breaks cause rain leakage and corrosion, it is desirable that the hole formed in the roofing material be as small as possible and be small, and that it be in close contact with the bolt.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a sword-point bolt having a hole formed in a roofing material that is as small as possible in a circular shape, and that is small and can be closely attached to the bolt.

[0008]

The above object is achieved by the present invention described below. That is, the present invention provides a sword bolt having a head, a screw portion, and a sword portion, which has a diameter gradually tapering from the outer diameter of the screw portion between the screw portion and the sword portion, and above the screw portion. A sword tip bolt characterized in that an inclined portion and a rod-shaped portion having the same diameter as the uppermost diameter of the inclined portion are provided between the inclined portion and the sword portion.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The sword-point bolt of the present invention has an inclined portion between the screw portion and the sword portion that has a diameter gradually tapering from the outer diameter of the screw portion. There is no. Therefore, when a hole is made in the roof material by hitting the roof material, the hole can be easily made with a small force. Moreover, there is no possibility that the roof material comes into contact with the protruding portion and the hole becomes unnecessarily large. In addition, unnecessary cracks and breaks do not occur in the holes formed in the roofing material, and substantially circular holes can be formed. Therefore, since the hole opened in the roofing material is in close contact with the bolt, it does not cause rain leakage or corrosion.
Also, since the size of the burrs in the holes is minimized, the burrs in the holes do not overhang and hinder the nut tightening.

[0010] In addition, the sword tip bolt of the present invention has, in addition to the inclined portion, a rod-shaped portion between the inclined portion and the tip portion having the same diameter as the uppermost diameter of the inclined portion. Even if the nut is temporarily placed in order to fit the nut from the point of the sword bolt, the nut does not easily roll down.
In addition, since the inclined portion continues to the lower portion of the upper portion of the rod, the nut can be fitted to the uppermost portion of the screw portion only by temporarily placing the nut, thereby improving workability.

It is preferable that the sword point bolt of the present invention is provided with a shank for fixing to the tight frame. The shank is usually provided between the head of the pointed bolt and the threaded portion. In this shank, after a penetrating bolt is penetrated through a tight frame, the shank portion is sandwiched by an appropriate fastener, and the tip bolt is fixed on the tight frame by plastic deformation of the shank portion itself.

Further, it is preferable to provide a turning stopper projecting toward the threaded portion on the head of the sword bolt according to the present invention. When the tip stop bolt is fixed on the tight frame, the rotation stopper bites into the tight frame, and has an effect of preventing rotation of the tip bolt when the nut is tightened by an anchor effect. One or two or more detents can be provided.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described more specifically below with reference to embodiments shown in the drawings. FIG. 1 is a view of a pointed bolt according to the present invention as viewed from the side. 1 is a head of a sword bolt, 2 is a screw portion, and 3 is a sword portion. 4 is an inclined part. The inclined portion is located above the screw portion, and gradually decreases in diameter toward the tip. 5 is a bar-shaped part. The rod portion is located above the inclined portion, and has a diameter the same as the uppermost portion of the inclined portion. The sword tip 3 is located further above the rod-shaped portion. 6 is a shank. The shank is a member that is located between the head and the screw portion and that enables the sword bolt to be fixed on the tight frame as described later. Reference numeral 7 denotes a rotation stopper.

FIG. 2 is a view for explaining one mode of use of the sword bolt according to the present invention. The sword point bolt of the present invention penetrates the tight frame 8 and then plastically deforms the shank with a fastener to fix the sword point bolt to the tight frame 8. 9 is a plastically deformed portion of the shank. With this deformed portion, the sword point bolt is firmly fixed on the tight frame. In addition, since the rotation stopper 7 bites into the tight frame 8 due to the plastic deformation, there is no possibility that the sword bolt is rotated at the time of the subsequent nut tightening and the tightening is not successful. 10 is a roofing material. After fixing the sword bolt on the tight frame, the roofing material is hit on the sword bolt using the punching tool 11 from above the sword bolt.

FIG. 3 is a view showing a state after the roof material has been hit on a sword bolt. 12 is a burr of a roofing material. Since the sword tip bolt of the present invention is provided with the inclined portion 4, there is no portion that comes into unnecessary contact with the roof material when hitting the roof material, and as a result, burrs are kept to a minimum necessary size, and The resulting burrs are in close contact with the sword bolt. This is very advantageous for the subsequent bolting. Also, it does not cause rain leakage or corrosion.

FIG. 4 shows a state of use of the sword bolt according to the present invention.
It is a figure explaining an example. A is the point bolt of the present invention. Appropriate tightening nuts 13 are arranged on the pointed bolts A fixed in the state shown in FIG. 4, and the roof 13 is completed by tightening the nuts 13 with appropriate fasteners. The tightening nut and the tightening tool used here are the same as those described in the above-mentioned conventional example, and are not particularly limited.

[0017]

The effect of the present invention is that the hole formed in the roofing material is as close to a circle as possible, and is small and has a shape such that the burr around the formed hole can be brought into close contact with the periphery of the bolt. In providing bolts.

[Brief description of the drawings]

FIG. 1 is a view of a pointed bolt of the present invention as viewed from a side.

FIG. 2 is a diagram in which a sword bolt according to the present invention is fixed on a tight frame.

FIG. 3 is a view in which a sword bolt according to the present invention is fixed on a tight frame and a roof material is hit.

FIG. 4 is an example of a state of use of a sword bolt according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Head part of sword tip bolt 2 ... Screw part 3 ... Sword tip part 4 ... Slope part 5 ... Bar-shaped part 6 ... Shank 7 ... Rotating stopper 8 ... Tight frame 9 ... Shank deformation part 10 ... Roofing material 11 ... Punching tool 12 ... Burr of roofing material 13 ... Nut A ... Sword point bolt

Claims (3)

[Claims] 1. A sword bolt having a head, a screw portion, and a sword portion, wherein the slant has a diameter gradually tapering from the outer diameter of the screw portion between the screw portion and the sword portion and above the screw portion. And a bar-shaped part having the same diameter as the uppermost diameter of said inclined part between said inclined part and said point. 2. The sword bolt according to claim 1, further comprising a shank provided between the head and the screw portion. 3. The sword bolt according to claim 1, further comprising a detent part provided on the head.