JP2001252741A - Tightening tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tightening toll which can eliminate the incomplete tightening as much as possible without degrading the efficiency of the rivet tightening work. SOLUTION: An external pressure is applied to a holding operation unit 13 having a trigger 12 to impart the external pressure, a barrel portion 14 is integrated with the holding operation unit 13, an inner cylindrical portion 15 located substantially parallel to the extending direction of the barrel portion 14 is provided in the barrel portion 14, a jaw 16 which retractably moves along the axial direction of the inner cylindrical portion 15 by the external pressure based on the operation of the trigger 12 is provided in the inner cylindrical portion 15 in a displaceable manner, and an inner holding portion 17 which can hold the inner cylindrical portion 15 in an angular-variable manner is provided across the barrel portion 14 and the inner cylindrical portion 15 so that the retreatable movement of the jaw 16 is substantially orthogonal to a fitted portion irrespective of the direction of the axis of the barrel portion 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fastening tool suitable for a blind rivet type fastening member used when fastening operation can be performed only from one side of a portion to be fastened.

[0002]

2. Description of the Related Art Conventionally, when a fastening operation can be performed only from one side of a fastened portion such as a wall, a so-called blind rivet system in which a leading end penetrating the fastened portion is expanded to perform a retaining process. A fastening member is used.

[0003] This blind type fastening member is used for joining a plurality of panels and the like, and also for fastening to a fastened portion which is easily pulled out even if a nail or a screw such as a gypsum board is driven in. It is also used as fixing means.

On the other hand, as a fastening tool for mounting such a blind rivet type fastening member on a portion to be fastened, for example, the one described in Japanese Patent Application Laid-Open No. 7-256382 as shown in FIG. 5 is known. ing.

[0005] The fastening tool 1 is provided on the gripping operation part 3 provided with a trigger 2 rotatably, and the gripping operation part 3 in cooperation with the gripping operation part 3 so as to have a substantially pistol shape as a whole. And a crocodile clip-shaped fastening member holding portion (hereinafter, referred to as a “jaw”) 5 provided substantially coaxially within the barrel portion 4.

A hose 6 for supplying a pressurized fluid (for example, air) is connected to the gripping operation unit 3. Further, a passage 7 for guiding the pressurized fluid toward the barrel portion 4 is formed in the gripping operation portion 3. Further, the gripping operation section 3 is provided with a valve 8 for supplying a pressurized fluid from the hose 6 to the passage 7 by operating the trigger 2. In addition to the above-described pressure fluid supply system, there is also a vacuum system in which fluid is sucked from the hose 6.

On the other hand, the fastening member 9 used in such a fastening tool 1 includes a main body 9a having a substantially T-shaped cross section and a penetrating body 9c penetrating a hole 9b formed in the main body 9a. .

The main body 9a has a head 9d and a leg 9e, and the tip of the leg 9e can be expanded and deformed (for example, cracked). One end 9f of the penetrating body 9c protrudes from the main body 9a so as to be held by the jaw 5, and the other end of the penetrating body 9c is provided with a substantially spherical expanding operation section 9g.

In such a configuration, the end 9f of the penetrating body 9c is clamped by the jaws 5 to thereby form the fastening member 9c.
Is held by the fastening tool 1, and from this state, the leg 9 e is inserted into the mounting hole 10 a of the mounted portion (for example, the double wall) 10.

Next, by operating the trigger 2 while pressing the fastening tool 1 toward the mounting portion 10, the jaw 5 is separated from the mounting portion 10 while holding one end 9 f by the supply of the pressure fluid from the hose 6. In the direction of

As shown in FIG. 6A, the displacement of the jaw 5 is caused by expanding the tip of the leg 9e and then deforming the penetrating member 9c at a predetermined cutting position by a pulling force of a predetermined value or more. Is cut and the fastening operation is completed.

[0012]

However, with such a fastening tool 1, there is no problem when the working environment such as the operator's eyes is in place, for example. For example, when the fastening work is performed, or when the fastening work is performed quickly to shorten the working time, the fastening work is performed in a state where the axis of the barrel 4 is not orthogonal to the mounted part 10. As a result, as shown in FIG. 6 (B), the fastening member 9 is mounted obliquely with respect to the mounted portion 10, and a gap H is generated between the mounted portion 10 and the head 9 d, and incomplete fastening is performed. There has been a risk of becoming.

Incidentally, in order to reduce the failure of the fastening work,
If the check operation is performed with care so that the axis of the barrel portion 4 is orthogonal to the mounted portion 10, the fastening operation operation must be slowed down by that much, and the work efficiency is reduced. is there.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a fastening tool capable of minimizing incomplete fastening without lowering the efficiency of fastening work. With the goal.

[0015]

According to one aspect of the present invention, there is provided a gripping operation unit provided with a trigger for supplying an external pressure and operating the supply of the external pressure. A barrel portion integral with the gripping operation portion, an inner cylinder portion provided on the barrel portion and always located substantially parallel to the extending direction of the barrel portion, and displaceably provided on the inner cylinder portion. A fastening member holding portion that advances and retreats along the axial direction of the inner cylinder portion by an external pressure based on the operation of the trigger, and the advancing and retreating of the fastening member holding portion that straddles the barrel portion and the inner cylinder portion. The gist of the present invention is to include an inner cylinder holding portion that variably holds the inner cylinder portion so as to be substantially orthogonal to the mounted portion regardless of the axial direction of the barrel portion.

According to the first aspect of the present invention, even if the barrel portion is inclined with respect to the attached portion, the inner cylinder portion is substantially perpendicular to the attached portion by the inner cylinder holding member. The incomplete fastening state is prevented without the members being fastened diagonally.

According to a second aspect of the present invention, the inner cylinder holding portion varies the angle of the inner cylinder portion by a load generated on the inner cylinder portion in response to an external pressure based on the operation of the trigger. And

According to the second aspect of the present invention, even if the pressing operation force of the fastening tool toward the mounting portion is weak, the pull-in force of the fastening member holding portion can be reduced from the mounting portion via the inner cylindrical portion. As a reaction force, the inner cylindrical portion is orthogonal to the mounted portion.

According to a third aspect of the present invention, the inner cylinder holding portion has a cylindrical intermediate member having a predetermined width, a first damper mechanism extending over an outer wall of the intermediate member and the barrel portion, and The gist is that it includes a second damper mechanism that straddles the inner wall of the intermediate body and the inner cylinder.

According to the third aspect of the invention, the displacement of the inner cylindrical portion can be permitted with a simple configuration.

According to a fourth aspect of the present invention, one of the damper mechanism portions allows displacement of the inner cylinder portion along a substantially axial direction of the inner cylinder portion, and the other of the damper mechanism portions has the other The gist of the present invention is to allow the displacement of the inner cylinder portion while intersecting substantially in the axial direction of the inner cylinder portion.

According to the configuration of the fourth aspect, the displacement of the inner cylindrical portion can be allowed in the three-dimensional direction, and the fastening can be further prevented from being incomplete.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a fastening tool according to the present invention will be described with reference to the drawings. Note that the fastened portions and fastened members (blind rivets) used in this embodiment are the same as those described in the related art, and therefore, FIG.
The same reference numerals as those used in FIG. 6 denote the same parts, and a detailed description thereof will be omitted.

In FIG. 1, a fastening tool 11 includes a gripping operation section 13 having a trigger 12 rotatably provided, and a gripping operation section 13 which cooperates with the gripping operation section 13 so as to have a substantially pistol shape. 13, a substantially cylindrical barrel 1 provided integrally with
4 and an inner cylindrical portion 15 provided substantially coaxially within the barrel portion 14.
And an alligator clip-shaped fastening member holding portion (hereinafter, referred to as a “jaw”) jaw 16 movably provided in the inner cylindrical portion 15, and an axis angle of the inner cylindrical portion 15 variably held. And an inner cylinder holding portion 17.

A hose 18 for supplying a pressurized fluid (for example, air) is connected to the gripping operation section 13. Further, a passage 13 a for guiding the pressurized fluid toward the barrel 14 is formed in the gripping operation part 13. Further, the gripping operation unit 13 is provided with a valve 13b for supplying a pressurized fluid from the hose 18 to the passage 13a by operating the trigger 12. The valve 13b is normally closed by pressurizing means such as a spring 13c. In addition to the above-described pressure fluid supply system, there is also a vacuum system in which fluid is sucked from the hose 18.

The barrel section 14 has a cylindrical shape open at the tip so as to surround the inner cylinder section 15, and the tip of the inner cylinder section 15 projects from the tip.

The inner cylinder portion 15 is always located on the same axis as the barrel portion 14, and the jaw 16 extends along the axial direction.
Are communicated with the passage 13a so as to move forward and backward. still,
The communication between the passage 13a and the inner cylinder 15 is made by a flammable hose or the like (not shown) because the inner cylinder 15 is displaceable.

As shown in FIGS. 2A and 2B, the inner cylinder holding portion 17 has a cylindrical intermediate member 19 having a predetermined width, an outer wall surface of the intermediate member 19, and an inner wall surface of the barrel portion 14. And a pair of second damper mechanism portions 21 that straddle the inner wall surface of the intermediate body 19 and the outer wall surface of the inner cylindrical portion 15.

The first damper mechanism 20 is provided to face up and down (FIG. 2 (A)) in the figure, and as shown in FIG. Pin 1
The holder 22 includes a holder 22 facing the protruding end 9a and a pair of springs 23 provided in the holder 22.

The holder 22 is fixed to the inner wall surface of the barrel section 14, and has a guide slot 22a formed along the axis of the barrel section 14. The above-described pin 19a is displaced by being guided by the guide elongated hole 22a, and is always kept in balance by the bias of the spring 23.

The second damper mechanism 21 is provided to face left and right in the figure (FIG. 2 (A)), and as shown in FIG. Mating pin 1
The holder 24 includes a holder 24 facing the protruding end of 5a, and springs 25 and 26 provided in the holder 24.

The holder 24 is fixed to the inner wall surface of the intermediate body 19, and is formed with a guide elongated hole 24a extending in the vertical direction in the drawing and intersecting with the axial direction of the barrel portion 14. The above-described pin 15a is displaced by being guided by the guide elongated hole 24a, and is always kept balanced by the bias of the spring 25. Further, the balance in the direction orthogonal to the guide elongated hole 24a is maintained by the bias of the spring 26.

Accordingly, the intermediate body 19 is displaced by the first damper mechanism 20 in the axial direction of the barrel section 14 and rotated about the engagement pin 15a as the guide slot 24a.
2 extending in the direction of the axis of the barrel 14 by the second damper mechanism 21 (FIG. 2).
(A) (up, down, left, and right directions) is allowed in the extending range of the guide elongated hole 24a and in the gap range between the inner cylindrical portion 15 and the holder 24.

In the above configuration, in order to fasten the fastened portion 10 (for example, a double wall) using the fastening member 9, one end 9 f of the penetrating body 9 c of the fastening member 9 is held by the jaw 16. The fastening member 9 holds the fastening tool 11, and from this state, the leg 9 e is attached to the mounting hole 10 of the mounted portion 10.
a.

Next, by operating the trigger 12 while pressing the fastening tool 11 toward the mounting portion 10, the jaw 16 is separated from the mounting portion 10 while the one end 9 f is clamped by the supply of the pressurized fluid from the hose 18. In the direction of

As shown in FIG. 6A, the displacement of the jaw 16 is caused by expanding and deforming the tip of the leg 9e, and then, at a cutting position set in advance by a pulling force of a predetermined value or more, at the cutting position. Is cut off and the fastening operation ends.

At this time, as shown in FIG. 3A, when the fastening tool 11 is inclined (the axis of the barrel 14 is
When the trigger 12 is not orthogonal, an external load is generated in the fastening member 9 in the direction indicated by the arrow a due to the initial displacement of the jaw 12 in the pulling direction in accordance with the operation of the trigger 12.

This external load becomes a rotational force in the radial direction of the inner cylinder portion 15, and while the rotational force is being absorbed by the second damper mechanism 21, the axis of the inner cylinder portion 15 is moved to the mounting portion 1.
The inner cylinder 15 is displaced so as to be orthogonal to 0.

When the inclination of the fastening tool 11 is large, the first and second damper mechanisms 20, 21 absorb the external pressure indicated by the arrow a, as shown in FIG. The inner cylinder 15 is displaced integrally with the intermediate body 19 so that the axis of the inner cylinder 15 is orthogonal to the mounted part 10.

By the way, in the above embodiment, the barrel 1
Although the barrel 4 has a cylindrical shape, the barrel portion 14 may be a simple rod-shaped body, and a cylindrical body (having substantially the same width as the intermediate body 15) corresponding to the barrel portion 14 shown in the figure may be provided on the rod-shaped body. Also,
As shown in FIGS. 4A and 4B, a plurality of shafts 30 in the form of a ball joint that straddle the inner wall surface of the barrel section 14 and the outer wall surface of the cylindrical body 15 (in FIG. 4
4 may be provided at equal division points equal to or greater than the equal division point.
As shown in (C), the configuration may be such that the inclination of the barrel section 14 is absorbed.

At this time, the inner cylinder holding portion is not limited to the above-described embodiment, for example, the shaft 30 is made of rubber having relatively hard elasticity or a structure taking into account design changes such as a spring. Absent.

[0042]

As described above, in the fastening tool according to the present invention, a gripping operation unit provided with a trigger for supplying an external pressure and operating the supply of the external pressure, An integral barrel portion, and an inner cylinder portion provided on the barrel portion and always located substantially parallel to the extending direction of the barrel portion,
A fastening member holding portion that is displaceably provided in the inner cylinder portion and moves forward and backward along the axial direction of the inner cylinder portion by an external pressure based on the operation of the trigger, and straddles the barrel portion and the inner cylinder portion. And an inner cylinder holding portion that variably holds the inner cylinder portion so that the forward / backward movement of the fastening member holding portion is substantially perpendicular to the attached portion regardless of the axial direction of the barrel portion. Thereby, incomplete fastening can be reduced as much as possible without lowering the fastening work efficiency.

According to the second aspect of the present invention, the angle of the inner cylinder portion can be changed by the weight generated in the inner cylinder portion by the external pressure based on the operation of the trigger. By doing so, even if the pressing operation force of the fastening tool toward the mounted portion is weak, the pulling force of the fastening member holding portion becomes a reaction force from the mounted portion via the inner cylindrical portion, and the inner cylindrical portion is covered. It can be perpendicular to the mounting part.

According to the third aspect of the present invention, the inner cylinder holding portion includes a cylindrical intermediate member having a predetermined width, a first damper mechanism extending over an outer wall of the intermediate member, and the barrel portion. By providing the second damper mechanism that straddles the inner wall of the intermediate body and the inner cylinder, displacement of the inner cylinder can be allowed with a simple configuration.

According to the fourth aspect of the invention, one of the damper mechanism portions allows displacement of the inner cylinder portion along a substantially axial direction of the inner cylinder portion, and the other of the respective damper mechanism portions. Is capable of allowing the displacement of the inner cylinder portion in a three-dimensional direction by allowing the displacement of the inner cylinder portion in a direction substantially intersecting with the axial direction of the inner cylinder portion. It can be.

[Brief description of the drawings]

FIG. 1 is a side view of a fastening tool according to the present invention, in which main parts are cut away.

FIG. 2A is a front view of a main part of a fastening tool,
(B) is a cutaway view of a main part, (C) is an enlarged sectional view of a first damper mechanism, and (D) is an enlarged sectional view of a second damper mechanism.

FIG. 3A is an explanatory view of a state where the fastening member is inclined, and FIG. 3B is an explanatory view of a state where the fastening member is normally corrected.

FIG. 4 shows a modification of the fastening tool according to the present invention,
(A) is a front view of the main part of the fastening tool, (B) is a cutaway view of the main part, and (C) is a cutaway view of the main part in a state where the inclination of the inner cylinder is corrected.

FIG. 5 is a side view showing a conventional fastening tool, with a main part thereof cut away.

6A is an explanatory view of a normal fastening state of the fastening member, and FIG. 6B is an explanatory view of an incomplete fastening state of the fastening member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 ... Fastening tool 12 ... Trigger 13 ... Grasping operation part 14 ... Barrel part 15 ... Inner cylinder part 16 ... Jaw (fastening member holding part) 17 ... Inner cylinder holding part

Claims (4)

[Claims] 1. A gripping operation unit provided with a trigger for supplying an external pressure and operating the supply of the external pressure, a barrel unit integrated with the gripping operation unit, and provided on the barrel unit and constantly provided. Is an inner cylinder portion that is positioned substantially parallel to the direction in which the barrel portion extends, and is displaceably provided on the inner cylinder portion and advances and retreats along the axial direction of the inner cylinder portion by external pressure based on operation of the trigger. The moving fastening member holding portion, the straddling portion and the inner cylinder portion, and the forward and backward movement of the fastening member holding portion is substantially orthogonal to the mounting portion regardless of the axial direction of the barrel portion. A fastening tool, comprising: an inner cylinder holding portion that holds the inner cylinder portion at a variable angle. 2. The internal cylinder holder according to claim 1, wherein an angle of the internal cylinder is changed by a load generated in the internal cylinder in response to an external pressure based on operation of the trigger.
A fastening tool according to item 1. 3. The inner cylinder holding portion includes a cylindrical intermediate member having a predetermined width, a first damper mechanism that straddles an outer wall of the intermediate member and the barrel portion, and an inner wall of the intermediate member and the inner member. The fastening tool according to claim 1, further comprising a second damper mechanism that straddles the cylinder. 4. One of the damper mechanism portions allows displacement of the inner cylinder portion along a substantially axial direction of the inner cylinder portion, and the other of the damper mechanism portions has a substantially axial direction of the inner cylinder portion. The fastening tool according to claim 3, wherein the inner cylinder portion is allowed to intersect with the displacement of the inner cylinder portion.