JPH09141382A - Rivet with drill - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rivet with drill capable of piercing and caulking in a series of rotating actions. SOLUTION: The rivet 1 with drill consists of an annular rivet 2, bolt 3 with hexagonal head and drill 4. A head part 2a of the rivet 2 has an oblong detent shape and a female screw 2d is formed on the inner peripheral face at a lower end part of a hole 2c. The bolt 3 with hexagonal head is screwed to a female screw 2d and a drill having same diameter with the rivet 2 is screwed into a tip part of the bolt 3 with hexagonal head. The bolt 3 with hexagonal head is rotated by a pneumatic screwing machine, etc., the drill 4 pierces rivet hole to a member to be fastened and the rivet 2 is inserted into the rivet hole, the head part 2a of the rivet 2 is engaged to a detent tool further to rotation-drive the bolt 3 with hexagonal head, the female screw part 2d is moved upward, an exposed part of a barrel part 2b is compressed to be caulked.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rivet, and more particularly to a rivet with a drill capable of punching a rivet hole and tightening the rivet in one step.

[0002]

2. Description of the Related Art Conventionally, a rivet with a drill is known in which a power tool is used to perform drilling and fastening in one step. This rivet with a drill is composed of a hollow tubular rivet and a drill which is inserted into the hole of the rivet and is crimped or bonded. The total length of the drill is longer than that of the rivet, a drill bit formed to have an outer diameter approximately equal to the body of the rivet projects from the tip of the rivet, and a drill shaft projects from the head of the rivet.

When a drill shaft is grasped by a drill chuck of an air drill or an electric drill and the drill is rotationally driven, a rivet hole is drilled in a member to be fastened by a drill bit and a rivet is inserted into the rivet hole. Then, when the drill is driven in the direction of pulling out the drill shaft, the drill bit having a diameter larger than the inner diameter of the rivet radially expands and crimps the body of the rivet penetrating the member to be fastened.

[0004]

The conventional rivet with a drill is constructed so as to be fastened by two steps of a rotating operation in the drilling step and a pulling operation in the caulking step, so that it can be used for tools such as air drills. There is a drawback that the mechanism and operation become complicated.

Therefore, there are technical problems to be solved in order to simplify the operation of the tool in the drilling and fastening process to reduce the cost and to facilitate the operation and improve the work efficiency. The invention aims to solve the above problems.

[0006]

SUMMARY OF THE INVENTION The present invention is proposed to achieve the above-mentioned object, and a female screw is formed at the tip end portion of the hole of a hollow tubular rivet, and the head of the rivet is a square head or the like. A non-rotating head screw having a longer overall length than the rivet is screwed from the head side of the rivet, and the tip of the head bolt protruding from the rivet has an outer diameter substantially equal to that of the body of the rivet. A rivet with a drill to which a drill is fixed is provided.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a rivet 1 with a drill, in which a hexagonal headed bolt 3 is mounted on a hollow tubular rivet 2 formed of a malleable metal such as an aluminum alloy. The head 2a of the rivet 2 is formed in an oval detent shape, and a female screw 2d is formed on the inner peripheral surface of the lower end portion of a hole 2c that vertically penetrates the head 2a and the body 2b.

The overall length of the hexagon headed bolt 3 is longer than that of the rivet 2, and is inserted into the hole 2c from the head 2a side of the rivet 2 and screwed into the female screw 2d. The drill 4 mounted on the tip of the hexagon headed bolt 3 protruding from the tip of the rivet 2 has the same outer diameter as the rivet 2, and a female screw 4a is formed from the center of the upper end surface to the upper and lower intermediate portions to form a hexagonal hexagon. It is screwed into the protruding portion of the headed bolt 3. The means for connecting the hexagon headed bolt 3 and the drill 4 may be a means such as press fitting instead of screw connection and is not particularly limited.

FIG. 2 shows a nose portion of a pneumatic screw tightening machine 5 for riveting using the rivet 1 with a drill, 6 is a cylindrical nose, and 7 is a drive socket which is rotationally driven by high pressure air. The contact head 8 that moves up and down along the nose 6 is attached to the nose 6. At the tip of the contact head 8, a detent socket hole 8a is formed which is centered on the drive socket 7 and is similar in shape to the head 2a of the rivet 2. The contact head 8 has a nose 6 which is biased by a spring (not shown).
It is urged in a direction projecting from and is pressed in the direction of the nose 6 by pressing against the member to be fastened.

Next, the fastening method and operation of the rivet 1 with a drill using the pneumatic screwing machine 5 will be described. FIG.
As shown in (a), when the rivet with a drill 1 is set in the nose 6 of the pneumatic screw tightener 5 and the trigger operation is performed,
The drive socket 7 descends and fits into the head of the hexagon headed bolt 3 to rotate the entire rivet 1 with a drill, and the thrust of the drive socket 7 in the axial direction causes the drill 4 to move to the 2nd position.
A rivet hole is opened in the fastened member 9.

Subsequently, as shown in FIG. 3 (b), when the drill 4 penetrates the fastened member 9, it is pressed by the drive socket 7 and the rivet 2 having the same diameter as the drill 4 is inserted into the rivet hole and the rivet is inserted. The head portion 2a of the second head 2a is fitted into the detent socket hole 8a of the contact head 8 to prevent the rivet 2 from rotating, and the head portion 2a abuts the upper surface of the fastened member 9 to stop the entry.

Then, the hexagonal headed bolt 3 and the drill 4 are further rotationally driven by the drive socket 7 which is continuing to rotate, and the hexagonal headed bolt 3 and the drill 4 are axially attached to a portion 2d of the rivet 2 screwed onto the hexagonal headed bolt 3. The driving force acts, and the head portion of the hexagon headed bolt 3 and the ridge 2d portion compress the body portion 2b of the rivet 2 and the ridge 2d portion moves upward. As a result, the exposed portion of the body portion 2b bulges outward and is caulked, the two fastened members 9 are fastened, and the riveting is completed.

The present invention is not limited to the above-described embodiment, and various modifications such as the head shapes of the rivet 2 and the bolt 3 are possible, and the present invention is not limited to these modifications. It goes without saying.

[0014]

As described above in detail, in the rivet of the present invention, the drilling step and the rivet tightening step are performed by a series of rotary operations, so that the conventional drill integrated type requiring a combined operation of rotation and pulling. Unlike the rivet, the driving mechanism of the tool such as the air drill is simplified and the operation is facilitated, which can contribute to the improvement of work efficiency and the cost reduction.

Since both ends of the fastened rivet are clamped by the bolts, the fastening force and the shearing resistance are extremely high, and a high-performance rivet capable of withstanding a large load can be provided.

[Brief description of the drawings]

FIG. 1 shows an embodiment of a rivet with a drill of the present invention,
(A) is a plan view, (b) is a front sectional view.

FIG. 2 is a cross-sectional view of the nose portion showing the pneumatic screw tightener for the rivet with a drill shown in FIG.

FIG. 3 shows the operation of the rivet with a drill of FIG. 1, (a)
FIG. 7 is an explanatory diagram showing a punching step, (b) a rivet inserting step, and (c) a caulking step.

[Explanation of symbols]

 1 rivet with drill 2 rivet 2a head 2b body 2c hole 2d female screw 3 hexagon head bolt 4 drill 4a female screw 5 pneumatic screw tightener 6 nose 7 drive socket 8 contact head 8a non-rotating socket hole 9 fastened member

Claims (1)

[Claims] 1. A hollow tubular rivet (2) is formed with a female screw (2d) at the tip of a hole (2c), and the head (2a) of the rivet has a rotation-preventing shape such as a square head. A headed bolt (3) having a long overall length is screwed from the head side of the rivet, and a drill (4) having an outer diameter substantially equal to that of the body portion (2b) of the rivet is attached to the tip of the headed bolt protruding from the rivet. ) Fixed rivet with a drill.