JP3301290B2 - Riveting tools - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rivet setting tool, and more particularly to a rivet setting tool which can perform rivet hole drilling and riveting in one step.

[0002]

2. Description of the Related Art Conventionally, there is known a rivet with a drill in which drilling and fastening can be performed in one step using a power tool. This drill rivet is constituted by a hollow tubular rivet and a drill inserted into a hole of the rivet and crimped or bonded. The total length of the drill is longer than that of the rivet, and a drill bit having an outer diameter substantially equal to the body of the rivet projects from the tip of the rivet, and the drill shaft projects from the head of the rivet.

[0003] When a drill shaft is gripped by a drill chuck of an air drill or an electric drill and the drill is driven to rotate, a rivet hole is formed in a member to be fastened by a drill bit, and a rivet is inserted into the rivet hole. Subsequently, when the head of the rivet is pressed by the rivet holder and pulled in the direction in which the drill shaft is pulled out, a drill bit having a diameter larger than the inner diameter of the rivet radiates the body of the rivet penetrating the member to be fastened. Expand in the direction and swage.

[0004]

In a conventional rivet with a drill, a rivet is caulked by pulling a drill projecting from a hole in the rivet in a pulling-out direction, and the rivet is fitted in an expanded portion of the rivet. Finished,
There is a disadvantage that the cost is high because one drill is consumed for one rivet.

[0005] Therefore, there arises a technical problem to be solved in order to simultaneously perform the drilling and the rivet setting and to reduce the cost of the rivet setting operation. The present invention aims to solve the above-mentioned problem. And

[0006]

DISCLOSURE OF THE INVENTION The present invention proposes a rivet setting tool using a rivet in which the inner diameter of a center hole of a hollow tubular rivet is reduced at a distal end portion thereof. , Two of the rivets
A slit is formed on the distal end surface of the mandrel where the small diameter portion and the middle large diameter portion of the outer diameter corresponding to the inner diameter of the step and the base connected to the air drill, the electric screwdriver and the like are continuous.
A long hole inclined with respect to the axis of the mandrel is drilled in two flat plate cutter blades, the two cutter blades are symmetrically overlapped and inserted into a slot, and a pin is inserted into the long hole. And mounted in the slit, so that the tips of the two cutter blades protrude in the axial direction from the tips of the mandrel, and
A tapered inclined surface is formed at the upper part of the outer surface of the two cutter blades, and the elongated holes are skewed toward the outer periphery when the cutter blade is moved in the base direction of the shaft, and move in the tip direction of the shaft. The shape is inclined in the axial direction when the
An object of the present invention is to provide a rivet setting tool in which the entire width of one cutter blade is freely expandable and contractable in a range from the same dimension as the outer diameter of the rivet to a value smaller than the large diameter portion of the rivet.

Further, a large-diameter portion and a small-diameter portion having an outer diameter corresponding to the two-step inner diameter of the rivet, and a base portion connected to an air drill, an electric screwdriver, and the like are slit on a distal end surface of a continuous mandrel. The two flat cutter blades are drilled with oblong holes inclined with respect to the axis of the mandrel, and the two cutter blades are symmetrically overlapped and inserted into a slot, and A pin is inserted through the hole into the slot, and the tips of the two cutter blades are made to protrude in the axial direction from the tip of the mandrel, and tapered slopes are formed on the upper outer surfaces of the two cutter blades. Forming a surface, the slot is inclined in the outer peripheral direction when the cutter blade is moved in the base direction of the shaft, and is inclined in the axial direction when moved in the tip direction of the shaft, Adjust the total width of the two cutter blades Than the central hole large-diameter portion of the rivet from the same dimension as the outer diameter of which is provided a riveting tool that freely scaled within the range becomes smaller.

In the rivet setting tool according to the first and second aspects, the two cutter blades mounted on the front end portion of the mandrel can expand and contract, and when the front end portion of the cutter blade is pressed against the surface to be riveted, The two cutter blades are expanded by the guide action of the elongated hole and the pin, and conversely, contracted when the cutter blades are moved in the distal direction.

In the rivet setting tool according to the first aspect, the cutter blade is reduced, the hollow rivet is inserted into the mandrel from the tip direction, the cutter blade is pressed against the surface to be driven, and the rivet setting tool is rotationally driven by the power tool. Then, a rivet hole having the same diameter as the rivet is opened by the two extended cutter blades, and at the same time, the rivet is inserted into the rivet hole. Then, when the rivet setting tool is further driven in the pushing direction, the rivet is swaged by expanding the small inner diameter portion of the rivet by the intermediate large diameter portion of the rivet setting tool. If the rivet setting tool is pulled up after the caulking is completed, the upper inclined surface of the cutter blade comes into contact with the inner peripheral surface of the rivet, the cutter blade contracts, and the rivet setting tool is pulled out of the rivet.

[0010] In the rivet setting tool according to the second aspect, the hollow rivet is inserted from the base side of the mandrel connected to the power tool to the intermediate small diameter portion, and the cutter blade is pressed against the surface to be driven to rotate the rivet setting tool. When driven, a rivet hole having the same diameter as the rivet is opened by the two extended cutter blades. Insert the rivet inserted in the middle small diameter part into the rivet hole, hold down the rivet head by fixing means such as a rivet holder, and drive the rivet setting tool in the pulling direction. The rivet is swaged by expanding and deforming the small-diameter portion of the inner diameter of the rivet. Simultaneously with the caulking, the upper inclined surface of the cutter blade comes into contact with the inner peripheral surface of the rivet, and the cutter blade contracts, is stored in the large-diameter portion at the tip, and the rivet setting tool is pulled out from the rivet.

[0011]

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 setting tool 1 according to the first aspect, and 2 is a rivet. The rivet 2 is a hollow cylindrical shape having a center hole penetrating from the head 3 to the tip of the body 4, and the center hole has two stages of an upper large diameter portion 5 a and a small diameter portion 5 b near the tip of the body 4. The inner diameter has changed.

The rivet setting tool 1 includes mandrels 6 and 2
The mandrel 6 includes a base 8 held by a chuck of a power tool such as an air drill, and an intermediate large-diameter portion 9 corresponding to a two-step inner diameter of a center hole of a rivet. A small diameter portion 10 is formed.

A slot 11 is formed on the distal end surface of the small diameter portion 10, and two cutter blades 7 are mounted on the slot 11. The length of the intermediate large-diameter portion 9 is longer than the entire length of the large-diameter portion 5 a of the center hole of the rivet 2, and a flange 12 is provided between the base 8 and the intermediate large-diameter portion 9.

As shown in FIG. 2, the cutter blade 7 has a blade portion 13 formed on an inclined sword tip and an outer surface.
A long hole 14 penetrating from the front to the back is formed at the center of the. The elongated hole 14 is inclined upward toward the outer surface, the upper end surface 7a of the cutter blade 7 is an inclined surface parallel to the elongated hole 14, and the corner between the upper end surface 7a and the outer surface 7b is notched. In addition, an outer inclined surface 7c which is opposite to the upper end surface 7a is formed.

As shown in FIG. 1, the two cutter blades 7 are symmetrically overlapped and inserted into the slot 11, and the pin hole 15 formed in the small diameter portion 10 of the mandrel 6 and the length of the cutter blade 7 The cutter blade 7 is supported by inserting the pin 16 into the hole 14. The top surface 11 a of the slit 11 is a symmetrical V-shaped inclined surface corresponding to the upper end surface 7 a of the two cutter blades 7.
6 can be moved in parallel along the top surface 11a of the slit 11 and skew with respect to the axis of the mandrel 6.

Therefore, by moving the cutter blade 7 up and down, the two cutter blades 7 expand and contract, and when the tip of the cutter blade 7 is pressed against a rivet driving object, the two cutter blades 7 are pushed up and expanded. I do. Two cutter blades 7
The outer diameter of the rivet 2 is substantially equal to the outer diameter of the rivet 2 in the expanded state, and is formed to have a diameter smaller than the large diameter portion 5a of the center hole of the rivet 2 when reduced.

Next, a rivet setting method using the power tool and the rivet setting tool 1 will be described. First, the rivet 2 is inserted from the tip of the mandrel 6 in a state where the two cutter blades 7 are reduced and stored in the small diameter portion 10 of the mandrel 6, and the tip of the cutter blade 7 is pressed against the target P to be driven. As shown in FIG. 3A, the two cutter blades 7 expand. Then, by turning on the power tool and rotating the mandrel 6, the rivet 2 is
A rivet hole having substantially the same diameter as that of the driving target P is drilled.

Subsequently, the rivet 2 is inserted into the rivet hole by the axial driving force applied to the mandrel 6 via the power tool, and the head comes into contact with the surface of the driving target P to stop the advance. As shown in b), the large-diameter portion 9 of the propelled mandrel 6 is the small-diameter portion 5 at the leading end of the rivet 2.
The rivet 2 is swaged by deforming a in the expanding direction.

Subsequently, when the power tool is raised, FIG.
As shown in (c), the outer inclined surface 7c of the cutter blade 7 contacts the inner peripheral surface of the rivet 2 and the cutter blade 7 slides in the reducing direction, and the rivet setting tool 1 is pulled out from the rivet 2.

Next, a rivet setting tool according to a second aspect will be described with reference to FIG. Riveting tool 2 shown in FIG.
One mandrel 22 is formed with a large-diameter portion 23 and a small-diameter portion 24 corresponding to the inner diameter of the central hole 5 of the rivet 2 in two steps, and a small-diameter portion 24 into which a plurality of rivets 2 are inserted in a stacked manner. A base (not shown) held by the chuck of the power tool is formed at the upper end of the power tool. The outer diameter of the base is the same as that of the intermediate small diameter portion 24, and a rivet is inserted from the base side into the intermediate small diameter portion 24.

A slot 25 is formed on the distal end surface of the large diameter portion 23, and two cutter blades 26 are mounted on the slot 25 in a symmetrically overlapping manner. The shapes of the slot 25 and the elongated hole 27 provided in the cutter blade 26 and the shape of the pin 28 of the mandrel 22 are the same as those of the rivet setting tool 1 in FIG. 1 and the expansion and contraction operations are the same. Omitted.

The width of the cutter blade 26 and the dimension of the elongated hole 27 become substantially equal to the outer diameter of the rivet 2 in a state where the two cutter blades 26 are expanded.
2 is formed to be stored in the large-diameter portion 23.

Subsequently, the power tool and the rivet setting tool 21
Will be described. First, a plurality of rivets 2 are inserted from the base side of the mandrel 22 to the intermediate small diameter portion 24.
Through the rivet fastening tool 21 to the chuck of the power tool.
Attach.

Then, as shown in FIG. 5 (a), when the tip of the cutter blade 26 is pressed against the driving target P, the two cutter blades 26 expand, and the power tool is activated to rotate the mandrel 22. By doing so, a rivet hole having substantially the same diameter as that of the rivet 2 is drilled in the target to be driven by the cutter blade 26, and as shown in FIG.
At the same time, the rivet 2 is inserted into the rivet hole, the head comes into contact with the surface to be driven, and the movement is stopped.

Subsequently, when the head of the rivet 2 is pressed by fixing means (not shown) such as a rivet holder and the rivet setting tool 21 is pulled in the pulling-out direction, FIG.
As shown in (1), the large diameter portion 23 of the tip of the mandrel 22 deforms the small diameter portion 5a at the tip portion of the rivet 2 in the expanding direction, and the rivet 2 is caulked. At the same time, the outer inclined surface 26c of the cutter blade 26 comes into contact with the inner peripheral surface of the rivet 2, and the cutter blade 26 slides in the reducing direction, is stored in the large diameter portion 23 of the mandrel 22, and the rivet setting tool 21
Is pulled out from the rivet 2, the upper rivet 2 falls to the large diameter portion 23, and the next rivet 2 is prepared. In this way, the rivet setting operation is performed continuously.

A power tool having a rotary drive mechanism such as a pneumatic nailing machine or an electric screwdriver can be used. However, a rotary drive mechanism and an impact drive mechanism for driving the mandrel in a pushing or pulling direction in an impact manner can be used. By using a screw tightening machine or the like provided with a rivet, it is possible to efficiently and reliably perform riveting.

The present invention is not limited to the above-described embodiment. For example, various modifications are possible, such as providing two sets of slide guide mechanisms vertically in parallel with a long hole and a pin. Of course.

[0028]

As described in detail above, the rivet setting tool of the present invention can continuously perform piercing and swaging of a rivet hole, and can reduce a cutter blade for piercing a rivet hole and pull out from the rivet. The rivet setting tool can be used repeatedly, and unlike conventional rivets and drills that are integrally fitted, only rivets are consumed, reducing the cost of consumables, improving work efficiency and reducing costs. Effective for reduction.

[Brief description of the drawings]

FIG. 1 shows a rivet setting tool according to claim 1;
(A) is a front view, (b) is a side view.

FIG. 2 shows a cutter blade, wherein (a) is a left side view and (b)
Is a front view, and (c) is a right side view.

FIG. 3 shows a rivet setting tool according to claim 1,
(A) is an explanatory view showing a punching step, (b) is a caulking step, and (c) is a tool drawing step.

FIG. 4 shows a rivet setting tool according to claim 2;
(A) is a front view, (b) is a side view.

FIG. 5 shows a rivet setting tool according to claim 2,
(A) is a drilling step, (b) is a rivet insertion step, (c)
It is explanatory drawing which shows a caulking and a tool extraction process.

[Explanation of symbols]

 1,21 Riveting tool 2 Rivets 5a Center hole large diameter part 5b Center hole small diameter part 6,22 Mandrel 7,26 Cutter blade 7c, 26c Outside inclined surface 9,23 Large diameter part 10,24 Small diameter part 11,25 Slot 14,27 slot 16,28 pin

Continuation of the front page (56) References JP-A-47-6641 (JP, A) JP-A-54-147584 (JP, A) JP-A-51-155472 (JP, U) , A) (58) Field surveyed (Int. Cl. ⁷ , DB name) B21J 15/00 B21J 15/04 B21J 15/10

Claims (2)

(57) [Claims] 1. A rivet setting tool using a rivet (2) in which the inner diameter of a center hole of a hollow tubular rivet is reduced at a distal end portion, wherein the outer diameter of the rivet corresponds to a two-step inner diameter of the rivet. 10) and an intermediate large-diameter portion (9) and a base (8) connected to an air drill, an electric screwdriver, etc., form a slit (11) at the tip end surface of a continuous mandrel (6). Flat cutter blade (7)
A long hole (14) inclined with respect to the axis of the mandrel is drilled, and the two cutter blades are symmetrically overlapped and inserted into a slot, and a pin (16) is inserted into the long hole. The two cutter blades are mounted in the slit so that the tips of the two cutter blades protrude in the axial direction from the tip of the mandrel, and tapered inclined surfaces (7c) are formed on the upper outer surfaces of the two cutter blades.
The slot is inclined in the outer peripheral direction when the cutter blade is moved in the base direction of the shaft, and is inclined in the axial direction when moved in the tip direction of the shaft. A rivet setting tool, wherein the entire width of the two cutter blades is freely expandable and contractable within a range from the same dimension as the outer diameter of the rivet to less than the large diameter portion (5a) of the rivet. 2. A rivet setting tool using a rivet (2) in which the inner diameter of a central hole of a hollow tubular rivet is reduced at a distal end portion, wherein a large-diameter distal end portion having an outer diameter corresponding to two-step inner diameters of the rivet. (23) and intermediate small diameter part (2
4) and a base connected to an air drill, an electric screwdriver, or the like, a slit (25) is formed on the distal end surface of the continuous mandrel (22), and the mandrel shaft is attached to two flat cutter blades (26). Open a slot (27) inclined with respect to the center, insert the two cutter blades symmetrically in a superposed manner into a slit, and insert a pin (28) into the slot to slit. And the tip of the two cutter blades is made to protrude in the axial direction from the tip of the mandrel, and a tapered inclined surface (26c) is formed on the upper outer surface of the two cutter blades.
The oblong hole is inclined obliquely in the outer peripheral direction when the cutter blade is moved in the base direction of the shaft, and is obliquely inclined in the axial center direction when moved in the distal direction of the shaft. A rivet setting tool in which the entire width of the two cutter blades is freely expandable and contractable in a range from the same dimension as the outer diameter of the rivet to a value smaller than the large diameter portion (5a) of the rivet.