JP2000190047A - Contracted member disassemble tool, attachment structure and contracted member disassembling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a contracted member disassembling tool of a simple constitution which can detouch a contracted member being contracted with a base from the base, without causing a burden to an operator. SOLUTION: This tool is equipped with a cutting blade 102 for cutting a shell part 11b and a flange part 11c of a blind rivet 10 along a shell part axial direction and, a cutting force providing means 400 for providing a cutting force to the cutting blade 102 for cutting a contracted part of the blind rivet 10. The cutting force providing means 400 comprises, a cutting force energizing means 410 which can accumulate a cutting force and provide a cutting force with the cutting blade 102 by releasing the cutting force being accumulated, a cutting force accumulation means 420 for accumulating a cutting force at the cutting force energizing means 410, and, a cutting force releasing means 430 for releasing the cutting force being accumulated at the cutting force energizing means 410 by the accumulation means 420 under a status where the force is reached a value at which the shell part 11b and the flange part 11c of the blind rivet 10 can be cut.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disassembly tool for a fastening member, an attachment structure thereof, and a disassembly method of the fastening member. More specifically, the disassembly portion of the fastening member fastened to a base material by mechanical fastening is disassembled. The present invention relates to a disassembling tool of a fastening member for removing the fastening member from the base material, an attachment structure thereof, and a disassembling method of the fastening member.

[0002]

2. Description of the Related Art Joining techniques for joining base materials such as steel plates and plastics or other members to the base material include welding, bonding, and mechanical fastening.

[0003] The above-mentioned welding has a disadvantage that it requires large-scale and expensive equipment and a space for ensuring safety.

[0004] The above-mentioned bonding is advantageous in that it is relatively inexpensive and can be performed in a small space, but the posture of the base material must be fixed until the adhesive is solidified and bonding is completed. Therefore, there is a problem that it takes time to join.

[0005] In addition, in such welding and bonding, when a base material is bonded and defective bonding occurs, the connection is re-used, or when the base material is recycled, the bonded portion is disassembled without damaging the base material. It becomes impossible to do.

On the other hand, the mechanical fastening includes screw fastening,
There are pin fastening, rivet fastening, and the like, which are widely used in various fields.

As is well known, the screw is fastened by using a wrench or screwdriver with a bolt 3 and a nut 4 as shown in FIG. 13A, or a tapping screw 5 as shown in FIG. 13B. To the fastening holes 1 of the base materials 1 and 2.
This is a fastening method in which the base materials 1 and 2 are mechanically joined by screwing the base materials 1 and 2a.

As shown in FIG. 14A, a pin 6 as a fastening member is inserted into the fastening holes 1a and 2a of the base materials 1 and 2 by using a swaging machine or a swaging tool. This is a fastening method of mechanically joining the base materials 1 and 2 by attaching them. Here, as shown in FIG. 14B, when the shaft 7 is caulked to the base material 1, the pin is also fastened, and the shaft 7 is regarded as a fastening member.

The above rivet is fastened to a solid rivet 8 as shown in FIG. 15A, a tubular rivet 9 as shown in FIG. 15B, and FIG. A fastening member such as a blind rivet 10 as shown in FIG.
As shown in (d), (e), and (f), this is a fastening method in which the base materials 1 and 2 are mechanically joined by being fastened to the fastening holes 1a and 2a of the base materials 1 and 2.

The blind rivet 10 shown in FIG.
As shown in FIG. 16C, the rivet body 11 includes a mandrel (fastening shaft) 12 inserted into a shaft hole 11a of the rivet body 11. For example, FIG.
In the procedure shown in (a), (b), (c) and (d),
The base materials 1 and 2 are fastened to the fastening holes 1a and 2a.

That is, the blind rivet 10
First, as shown in FIG. 16A, the body 11b of the rivet body 11 is inserted into the fastening holes 1a, 2a of the base materials 1, 2.

Next, as shown in FIG. 16B, a riveting tool 13 is set on the mandrel 12 of the blind rivet 10.

When the trigger of the riveting tool 13 is pulled with the nose piece 13a of the riveting tool 13 in close contact with the flange portion 11c of the rivet body 11, as shown in FIG. The mandrel 12 of the blind rivet 10 is grasped by the jaw 13b of 13 and pulled up.

Thus, the body 1 of the rivet body 11
1b projecting from the base material 2 is the mandrel 12
Is plastically deformed like a drawing process by the mandrel head 12a, and is caulked to the base material 2.

In this state, when the mandrel 12 is further pulled up by the jaw 13b, as shown in FIG.
As shown in (d), the broken portion 12b of the mandrel 12
In FIG. 15C, the mandrel 12 is broken, and the fastening of the base materials 1 and 2 by the blind rivet 10 is completed.

The blind rivet 10 is shown in FIG.
As is clear from (a), (b), (c) and (d), fastening work to the base materials 1 and 2 without supporting the body 11b side (the back side of the base materials 1 and 2). So, for example, the base material 1,
2 is suitable for fastening at places where the hands are not accessible on the back side.

As another fastening method, as shown in FIG. 17, a fastening portion 1b formed in advance integrally with one base material 1 is caulked to a fastening hole 2a of the other base material 2, A fastening method called burring caulking for mechanically joining the base materials 1 and 2 is known. Here, the fastening portion 1b of the base material 1 fastened by this burring caulking
Are also regarded as the above-mentioned fastening members.

In such mechanical fastening, the fastening member can be removed from the base material by disassembling the fastening portion of the fastening member fastened to the base material. In comparison, in a little space,
There is an advantage that refastening of the fastening member to the base material and recycling of the base material can be performed easily at low cost.

However, the fastening members used for mechanical fastening such as pin fastening, rivet fastening, and burring swaging described above are fastened to the base material by plastically deforming the body. When a fastening failure occurs when fastening the fastening member to the base material and re-fastening is performed, or when the base material is recycled, when the fastening member is removed from the base material, the fastening portion of the fastening member is removed. It has to be destroyed, and it takes time and effort to disassemble it and damages the base material during disassembly.

That is, as a general method of disassembling this kind of fastening member, for example, as shown in FIG. 18, a fastening portion (the above-described blind rivet 10) of the fastening member (here, the blind rivet 10) is drilled by a drill 14. Flange 11c)
After removing the fastening portion of the fastening member from the body portion 11b, the body portion 11b is beaten from the cut portion side to extract the fastening member from the base materials 1 and 2. In the conventional disassembly method, the preparation and selection of the drill 14,
In addition, it takes time to set up a cutting operation or the like.

In this conventional disassembly method, as shown in FIG. 19, when cutting the fastening portion (flange portion 11c),
The tip of the drill 14 may reach the base material 1, and the fastening hole 1a of the base material 1 may be cut.

When the fastening hole 1a of the base material 1 has been cut in this way, the base material 1 cannot be recycled or a fastening member (blind rivet 10) is refastened to the base material 1. However, there was a problem that a sufficient fastening force could not be secured.

Further, in the method of disassembling the fastening member using such a drill, when the fastening portion of the fastening member is cut, the rotation of the drill 14 causes the fastening member to rotate and cause scratches on the base material. In some cases, it was impossible to cut the fastening part.

In the case where the base material damaged by the rotation of the fastening member constitutes the exterior surface of the product, the commercial value of the product is significantly reduced, and the product itself is defective. Is highly likely to occur.

When the fastening member is rotated by the rotation of the drill 14 at the time of cutting the fastening portion of the fastening member as described above, usually, as shown in FIG. A method is adopted in which the part 11c and the body part 11b are gripped by a gripping tool 15 such as pliers or pliers to prevent the fastening member from rotating around. However, it is difficult and dangerous to perform this work alone. , Needs multiple workers.

In particular, when the flange portion 11c of the fastening member is formed in a dish shape and it is not possible to grip the flange portion 11c with the gripping tool 15 (see FIG. 22).
Or, when the fastening member is fastened to a place where the hand cannot enter the body 11b side, the body 1 of the fastening part
Since it is difficult to hold the 1b with the gripping tool 15 and prevent the fastening member from rotating, it is extremely difficult to cut the fastening member using a drill as described above.

In the case of screw fastening as shown in FIGS. 13 (a) and 13 (b), bolts 3, nuts 4 and tapping screws 5 as fastening members can be relatively easily formed from the base materials 1, 2. In many cases, the screw portion of the bolt 3, the nut 4, or the tapping screw 5 is rusted and fixed, or the screw thread is damaged, and the bolt 3, the nut 4, or the tapping screw 5 is removed. If the base materials 1 and 2 run idle, or if the engagement portion with a fastening tool (spanner or screwdriver) is damaged, it is extremely difficult to remove the bolts 3, nuts 4 and tapping screws 5. Accompany.

The present inventor has, for example, shown in FIG. 20, the inside diameter d of the fastening holes 1a, 2a of the base materials 1, 2.
_1, d ₂ has a small diameter of the cutting edge 103 than, and, along the boundary region between the body portion 11b and the flange portion 11c of the blind rivet 10 as a substantially parallel the fastening member on the inner peripheral surface of the fastening hole 1a A cutting blade 102 having a substantially cylindrical blade tip 104, and a cutting blade support (body cover) 200 for supporting the cutting blade 102 to be able to advance and retreat along the center axis direction of the fastening hole 1a of the base material 1. The cutting blade 102 is attached to the flange portion 11c along the central axis direction of the fastening hole 1a of the base material 1.
And a cutting force for cutting the fastening portion of the blind rivet 10 along the boundary region between the body portion 11b and the flange portion 11c of the blind rivet 10 by applying a cutting force to the cutting blade 102. Force applying means 300
Has been developed.

The cutting force applying means 3 of the disassembly tool 100A
00 can accumulate the cutting force applied to the cutting blade, and release the accumulated cutting force, so that the cutting blade 102 moves toward the fastening portion of the blind rivet 10.
An extensible coil spring 303 as a cutting force urging means for energizing the cutting force;
The stopper 304 as a cutting force accumulating means for locking the cutting blade 102 at a position where the cutting blade 102 contracts and accumulates a cutting force on the cutting blade 102 in the cutting direction, and the stopper 3
And a release button 305 as a cutting force releasing means for releasing the engagement of the cutting blade 102 with the cutting blade 04.

Using the disassembly tool 100A, the base materials 1, 2
To disassemble the blind rivet 10 fastened to
First, the cutting edge 102 of the cutting blade 102 is made to face a boundary region between the body 11b and the flange 11c of the blind rivet 10, and in this state, the cutting blade support 200 of the disassembling tool 100A is moved to the blind rivet. Press on the 10 side.

Thus, the cutting blade 102 contracts the coil spring 303 against the extension force of the coil spring 303 while the cutting blade support 200
Is pushed into.

Here, the boundary area between the body and the flange of the fastening member is, for example, the rivet body 1 of the blind rivet 10 as the fastening member shown in FIG.
1 is a boundary between the body 11b and the flange 11c,
In the figure, it refers to a cylindrical area substantially parallel to the outer peripheral surface of the trunk 11b indicated by a broken line A.

Then, the position of the cutting blade 102 pushed into the cutting blade support 200 is reduced by the contraction of the coil spring 303 so that the cutting force on the cutting blade 102 in the cutting direction (the tensile force of the coil spring 303). When the position reaches the position where the cutting blade 102 is sufficiently accumulated, the stopper 304 disposed on the outer peripheral portion of the cutting blade 102 so as to be able to advance and retreat is engaged with the locking hole 200 formed in the inner peripheral portion of the cutting blade support 200.
The cutting blade 102 is pushed by the elastic force of the spring 306 to engage with the cutting blade b, and the cutting blade 102 is locked to the cutting blade support 200 in a state where the cutting force is accumulated.

In this state, the release button 305 provided on the outer peripheral portion of the cutting blade support 200 so as to be able to advance and retreat is operated.
When pushed into the cutting blade support 200 against the elasticity of the spring 307, the release pin 305 of the release button 305 is released.
As a result, the stopper 304 engaged with the locking hole 200b causes the cutting blade 1 to resist the elasticity of the spring 306.
02, the cutting blade 102 is released from the engagement with the cutting blade support 200.

When the locking of the cutting blade 102 with respect to the cutting blade support 200 is released, the extension of the coil spring 303 causes the cutting blade 1 to move.
02, a cutting force in the cutting direction is urged.

As a result, the cutting edge portion 104 of the cutting blade 102 of the disassembling tool 100A bites along the boundary area A between the body portion 11b and the flange portion 11c of the blind rivet 10, and the fastening portion of the blind rivet 10 is formed. The flange 11c is separated from the body 11b by cutting.

In this disassembly tool 100A, FIG.
As shown in the figure, the cutting edge portion 104 of the cutting blade 102 moves linearly substantially in parallel with the central axes of the fastening holes 1a and 2a of the base materials 1 and 2, and the fastening portion of the blind rivet 10 (boundary area A). ) Is cut, so that the blind rivet 10 spins when the blind rivet 10 is disassembled or the base materials 1 and 2 are damaged due to the idling or the like when disassembling the blind rivet 10 as in the conventional disassembly method using a drill. And the blind rivet 10 can be easily and quickly removed from the base materials 1 and 2.

When disassembling the blind rivet 10 fastened to the base materials 1 and 2 using the disassembly tool 100A, as shown in FIG. 18, the flange rivet 10 of the blind rivet 10 and the body There is no need to hold the 11b with the holding tool 15 such as pliers or pliers and fix it.

Therefore, according to the disassembly tool 100A,
For example, as shown in FIG.
The shape of the flange portion 11c of 0 is formed in a dish shape, and the flange surface of the flange portion 11c cuts into the base material 1 or the crimped portion of the body portion 11b of the blind rivet 10 cuts into the base material 2. Even if it is difficult to grip the flange portion 11c or the trunk portion 11b of the blind rivet 10 with the gripping tool 15 such as pliers or pliers, the fastening portion of the blind rivet 10 is cut by the cutting blade 102. Thus, the flange portion 11c can be separated from the body portion 11b.

[0040]

However, in the disassembly tool 100A, when the blind rivet 10 fastened to the base materials 1 and 2 is disassembled, as described above, it resists the extension force of the coil spring 303. Then, the operator needs to push the cutting blade 102 into the cutting blade support 200 while contracting the coil spring 303.

The extension force of the coil spring 303 is
Since the cutting blade 102 is set to have a cutting force large enough to cut the fastening portion of the fastening member, the elongation of the coil spring 303 is extremely high.

Therefore, in the disassembling tool 100A, when the cutting blade 102 is pushed into the cutting blade support 200 while contracting the coil spring 303 against the extension force of the coil spring 303, There is a problem that places a heavy burden on the operator.

In the disassembly tool 100A,
Cutting blade 102 pushed into cutting blade support 200
Is contracted by the coil spring 303,
The cutting blade 102 needs to be locked to the cutting blade support 200 in a state where the cutting blade 102 reaches a position where the cutting force on the cutting blade 102 in the cutting direction is sufficiently accumulated.

For this reason, in the disassembling tool 100A, as described above, the stopper 304 provided on the outer peripheral portion of the cutting blade 102 so as to be able to advance and retreat is formed on the inner peripheral portion of the cutting blade support 200. A mechanism is required to push and engage the engaged locking hole 200b by the elastic force of the spring 306, and the structure becomes complicated.

The present invention has been made in view of the above problems, and an object of the present invention is to enable a fastening member fastened to a base material to be removed from the base material without burdening an operator. An object of the present invention is to provide a disassembly tool for a fastening member having a simple configuration, an attachment structure thereof, and a disassembly method for the fastening member.

[0046]

In order to achieve the above object, according to the present invention, there is provided a body which is inserted into a fastening hole of a base material and the body which is pressed against a peripheral edge of the fastening hole. A disassembly tool for removing a fastening member fastened to the base material from the base material by means of a substantially integral flange portion, wherein the body member has a body portion and a flange portion. A cutting blade for cutting the trunk and the flange along the direction, and a cutting force applying means for applying a cutting force for cutting the trunk and the flange of the fastening member to the cutting blade. The cutting force applying means can accumulate the cutting force applied to the cutting blade and urge the cutting blade toward the fastening member by releasing the accumulated cutting force. Cutting force urging means, and causing the cutting force urging means to accumulate the cutting force applied to the cutting blade. In a state where the cutting force accumulated in the cutting force accumulating means by the cutting force accumulating means and the cutting force urging means by the cutting force accumulating means reaches a value at which the body and the flange of the fastening member can be cut, the cutting force is applied. And a cutting force releasing means for releasing the cutting force accumulated in the biasing means.

In this disassembly tool, the cutting force applied to the cutting blade is stored in the cutting force accumulating means by the cutting force urging means (for example, the disassembly tool 100 shown in FIG. 20).
A coil spring 303). Therefore,
In this disassembly tool, it is not necessary to accumulate the cutting force applied to the cutting blade by the force of the operator, so that the burden on the operator when cutting the fastening portion of the fastening member is reduced.

In this disassembly tool, the cutting force accumulated in the cutting force urging means by the cutting force accumulating means reaches a value at which the body and the flange of the fastening member can be cut. The cutting force accumulated in the cutting force urging means is released by the cutting force releasing means. Therefore, in this disassembly tool, unlike the disassembly tool 100A, it is not necessary to lock the cutting blade in a state where the cutting force is accumulated in the cutting force urging means, so that the structure is simplified. Becomes possible.

According to a second aspect of the present invention, in the disassembling tool for the fastening member of the first aspect, the cutting force urging means has a property that a cutting force applied to the cutting blade by being compressed is accumulated. The cutting force accumulating means includes a compression member for compressing the cutting force urging means, and a compression member moving means for moving the compression member in a direction in which the cutting force urging means is compressed; The force releasing means loses the cutting force accumulated in the cutting force urging means during the process in which the compression member is moved by the compression member moving means and the cutting force is accumulated in the cutting force urging means. It is characterized by comprising a rupture portion formed in the compression member to be ruptured.

In this disassembly tool, the cutting force applied to the cutting blade is reduced by moving the compression member of the cutting force accumulating means by the compression member moving means and compressing the cutting force urging means. It is stored in the cutting force urging means. Therefore, in this disassembly tool, it is not necessary to accumulate the cutting force applied to the cutting blade by the force of the operator, so that the burden on the operator when cutting the fastening portion of the fastening member can be reduced.

In the process in which the compressing member is moved by the compressing member moving means and the cutting force is accumulated in the cutting force urging means, the breaking portion formed in the compressing member is subjected to the cutting force. The cutting force accumulated in the cutting force urging means is released by being broken by losing the cutting force accumulated in the urging means. Therefore, in this disassembly tool,
As in the disassembly tool 100A, a mechanism for locking the cutting blade in a state where the cutting force is accumulated in the cutting force urging means becomes unnecessary, so that the structure can be further simplified.

According to a third aspect of the present invention, in the disassembling tool for the fastening member according to the second aspect, the cutting force urging means is constituted by an elastic member.

In this disassembly tool, the compression member of the cutting force accumulating means is moved by the compression member moving means and the elastic member is compressed, whereby the cutting force applied to the cutting blade is applied to the elastic member. Is accumulated in Then, in the process of accumulating the cutting force in the elastic member, the breaking portion formed in the compression member is broken by losing the cutting force accumulated in the elastic member, thereby accumulating in the elastic member. The released cutting force is released.

Here, as the elastic member, any elastic member can be used as long as it can apply a predetermined cutting force to the cutting blade by releasing the elasticity accumulated by compression. For example, a coil spring, a leaf spring, rubber, or an air spring can be used.

The invention of claim 4 is the invention of claim 2 or 3
In the disassembly tool of the fastening member, the compression member of the cutting force accumulating means for compressing the cutting force urging means is configured to be detachable from the compression member moving means for moving the compression member, and It is characterized by being formed integrally with the cutting blade.

In this disassembly tool, since the compression member and the cutting blade are integrally formed, the cutting blade is attached to and detached from the compression member moving means together with the compression member. Thereby, the structure for supporting the cutting blade becomes unnecessary or simple, and the structure of the disassembling tool can be simplified.

According to a fifth aspect of the present invention, in the disassembling tool for the fastening member of the first, second, third or fourth aspect, the cutting blade has a cutting edge having a diameter smaller than an inner diameter of a fastening hole of the base material. ,
Further, the fastening member has a substantially cylindrical blade edge portion along the body portion axial direction of the body portion and the flange portion.

In this disassembly tool, when the fastening portion of the fastening member is cut by the cutting blade, the cutting edge of the cutting blade is located inside the fastening hole of the base material. Damage to the material is prevented.

The invention according to claim 6 is based on claims 1, 2, 3,
In the disassembling tool for the fastening member of the fourth or fifth aspect, when the fastening member of the fastening member is cut by fitting into a shaft hole formed in the fastening member substantially coaxial with the body of the fastening member. A cutting blade positioning member for positioning a cutting position of the cutting blade is provided.

In this disassembly tool, the cutting blade positioning member is fitted into the shaft hole of the flange portion, whereby the cutting position of the cutting blade is determined when cutting the fastening portion of the fastening member. Therefore, the cutting position of the cutting blade does not shift, and the trunk and the flange can be separated at an accurate position.

According to a seventh aspect of the present invention, in the disassembly tool for the fastening member according to the sixth aspect, the cutting blade positioning member is formed integrally with the compression member.

In this disassembly tool, since the cutting blade positioning member is formed integrally with the compression member, it is not necessary to dispose the cutting blade positioning member as an independent component on the cutting blade, and the shape of the cutting blade is reduced. Is simplified, and the number of parts can be reduced.

The invention according to claim 8 is based on claims 1, 2, 3,
The disassembly tool of 4, 5, 6, or 7 includes a contact member that comes into contact with the base material when the fastening portion of the fastening member is cut by the cutting blade. Is what you do.

In this disassembly tool, in a state where the contact member is in contact with the base material, the cutting blade is used to fasten the fastening member along the boundary region between the trunk portion and the flange portion of the fastening member. The part is cut off. Thereby, the separation distance between the base material and the cutting edge of the cutting blade when cutting the fastening portion of the fastening member is kept constant, so that the cutting stroke of the cutting blade when cutting the fastening portion of the fastening member is constant. Thus, the trunk portion and the flange portion of the fastening member can be reliably separated.

According to a ninth aspect of the present invention, in the disassembling tool for the fastening member according to the eighth aspect, the contact member supports the cutting blade so as to be able to advance and retreat along the center axis direction of the fastening hole of the base material. It is provided on the blade support.

In this disassembling tool, when the fastening portion of the fastening member is cut, the contact member provided on the cutting blade support comes into contact with the base material, so that the cutting blade support and the base material can be cut. , That is, the positional relationship between the base material and the cutting blade is always kept constant. Accordingly, the position of the cutting blade support is shifted due to the reaction force of the cutting force applied to the cutting blade, depending on how the operator holds the cutting blade support at the time of cutting, and the movement of the cutting blade is performed. The stroke is prevented from being changed, and the center of the cutting blade is prevented from being shifted from the center of the flange portion, and the moving direction of the cutting blade is prevented from being inclined with respect to the axial direction of the fastening hole of the base material. You. Therefore, in this disassembly tool, the fastening member fastened to the base material can be smoothly and reliably removed from the base material without damaging the base material.

The invention according to claim 10 is the invention according to claim 8 or
In the disassembly tool for a fastening member, the contact portion of the contact member that contacts the base material has a magnetic force that is attracted to the base material.

In this disassembly tool, when the fastening portion of the fastening member is cut, the contact portion of the contact member is attracted to the base material by magnetic force and contacts the base material. Thereby, the adhesion between the contact portion of the contact member and the base material is increased, and the positional accuracy between the cutting blade and the base material during the cutting is improved. Also, without the operator holding the disassembly tool at the time of the cutting,
Since the contact portion of the contact member can be brought into close contact with the base material, the burden on the operator at the time of cutting is reduced.

According to the eleventh aspect of the present invention, the body of the fastening member is inserted into the fastening hole of the base material, and the flange substantially integral with the body is pressed against the peripheral edge of the fastening hole. By using a fastening tool for fastening the fastening member to the base material by pulling up the fastening shaft inserted into the shaft hole of the body by the fastening shaft gripper and breaking the fastening shaft at a predetermined break portion, A disassembling tool for a fastening member for removing a fastening member fastened to the base material from the base material, wherein the body and the flange are formed along a body axis direction of the body and the flange of the fastening member. The cutting blade that cuts the, has the property that the cutting force that cuts the body and flange portion of the fastening member by being compressed, and the accumulated cutting force is released, Cutting force urging means for urging the cutting blade to the cutting force toward the fastening member; A shaft having a shaft portion detachably attached to a fastening shaft grip portion of a binding tool, and the shaft portion being pulled up by the fastening shaft grip portion in a state where the shaft portion is mounted on the fastening shaft grip portion. A compression member for compressing the cutting force urging means, and a shaft portion of the compression member being pulled up by a fastening shaft gripper of the fastening tool and compressing the cutting force urging means, whereby the cutting force urging means is compressed. The cutting force accumulated in the cutting member is broken by losing the cutting force accumulated in the cutting force urging means in a state where the cutting force reaches a value at which the body and the flange of the fastening member can be cut. A breaking portion formed in the compression member for releasing the cutting force accumulated in the cutting force urging means;
It is characterized by having.

In this disassembly tool, for example, FIG.
As shown in the figure, the trunk 11b of the blind rivet 10
A fastening tool such as a riveting tool 13 of a blind rivet 10 that pulls up a mandrel (fastening shaft) 12 inserted through the shaft hole 11a and breaks the mandrel 12 at a predetermined breaking portion 12b (see FIG. 15C). By using, the fastening member fastened to the base material is removed.

That is, in this disassembly tool, first, the shaft of the compression member is mounted on the fastening shaft grip of the fastening tool. Then, the shaft is pulled up by the fastening shaft gripper of the fastening tool, whereby the cutting force urging means is compressed, and the cutting force is accumulated in the cutting force urging means. When the cutting force accumulated in the cutting force urging means reaches a value at which the body and the flange of the fastening member can be cut, the breaking portion formed in the compression member reduces the cutting force. It is broken by the cutting force accumulated in the urging means. Thereby, the cutting force accumulated in the cutting force urging means is released. When the cutting force accumulated in the cutting force urging means is released, the cutting force is urged by the cutting blade toward the fastening member by the cutting force urging means. Thus, the body and the flange are cut by the cutting blade along the body axis of the body and the flange of the fastening member.

Therefore, in this disassembly tool, by compressing the cutting force urging means by the fastening tool, the cutting force urging the cutting blade can be accumulated in the cutting force urging means, and Since the cutting force is urged to the cutting blade by breaking the breaking portion of the compression member with a fastening tool, the burden on the operator when cutting the fastening portion of the fastening member is reduced, and the disassembly is performed. Like the tool 100A,
A mechanism for locking the cutting blade in a state where the cutting force is accumulated in the cutting force urging means becomes unnecessary, and the structure is simplified.

According to a twelfth aspect of the present invention, in the disassembling tool for the fastening member according to the eleventh aspect, the cutting blade has a substantially cylindrical cutting edge portion along the body axis direction of the body and the flange of the fastening member. And an end wall substantially orthogonal to the body axis direction in which a through hole through which the shaft portion of the compression member is inserted is formed,
The compression member, when the shaft of the compression member is inserted through the through hole formed in the end wall of the cutting blade, when pulled up by the fastening shaft grip portion of the fastening tool, the cutting blade, It is characterized by having an engaging portion for engaging and lifting the cutting blade.

In this disassembly tool, first, the shaft of the compression member is inserted into a through hole formed in the end wall of the cutting blade, and the shaft is attached to the fastening shaft grip of the fastening tool. You. Next, the shaft portion is pulled up by the fastening shaft grip portion of the fastening tool, so that the engaging portion of the compression member is engaged with the cutting blade, and the cutting blade is pulled up. Thereby, the cutting force urging means is compressed, and the cutting force is accumulated in the cutting force urging means. When the cutting force accumulated in the cutting force urging means reaches a value at which the body and the flange of the fastening member can be cut, the breaking portion formed in the compression member reduces the cutting force. It is broken by the cutting force accumulated in the urging means. Thereby, the cutting force accumulated in the cutting force urging means is released, and the cutting force is urged by the cutting blade toward the fastening member by the cutting force urging means. The body and the flange are cut by the cutting blade along the body axis of the part and the flange.

According to a thirteenth aspect of the present invention, in the disassembling tool for the fastening member according to the eleventh or twelfth aspect, the breaking portion of the compression member which is broken by losing the cutting force accumulated in the cutting force urging means is provided. The compression member is formed on a shaft portion of the compression member detachably attached to a fastening shaft grip portion of the fastening tool.

In this disassembly tool, when the cutting force accumulated in the cutting force urging means reaches a value at which the body and the flange of the fastening member can be cut, the shaft is pressed against the shaft of the compression member. When the formed breaking portion is broken by losing the cutting force accumulated in the cutting force urging means, the cutting force accumulated in the cutting force urging means is released.

According to a fourteenth aspect of the present invention, in the disassembly tool for a fastening member according to the thirteenth aspect, a plurality of the break portions are formed at a predetermined interval on the shaft portion, and the fastening tool grips the fastening shaft. It is characterized by being formed in such a strength that it is broken sequentially from the side closer to the part.

In this disassembly tool, a plurality of breaks formed in the shaft of the compression member are removed by mounting the shaft of the compression member on the fastening shaft gripper of the fastening tool and lifting the shaft. The fastening tool can be sequentially broken from the side closer to the holding portion of the fastening shaft. Thereby, the compression member can be used repeatedly by the number of the broken portions, and the compression member can be saved. In addition, the plurality of broken portions having different strengths formed on the shaft portion of the compression member are selectively gripped and broken by the fastening shaft grip portion of the fastening tool, thereby accumulating in the cutting force urging means. The magnitude of the cutting force to be performed can be changed. Thereby, the magnitude of the cutting force can be selected according to the strength of the body and the flange of the fastening member.

According to a fifteenth aspect of the present invention, in the disassembling tool for the fastening member according to the twelfth aspect, the breaking portion of the compression member that is broken by losing the cutting force accumulated in the cutting force urging means,
The compression member is formed between an engagement portion and a shaft portion, and is broken when the engagement portion separates from the shaft portion in response to the cutting force.

In this disassembly tool, the cutting blade of the compression member is cut in a state where the cutting force accumulated in the cutting force urging means reaches a value at which the body and the flange of the fastening member can be cut. And the engaging portion for lifting the cutting blade is separated from the shaft portion by losing the cutting force accumulated in the cutting force urging means. As a result, the breaking portion of the compression member is broken, and the cutting force accumulated in the cutting force urging means is released.

The sixteenth aspect of the present invention relates to the eleventh, twelfth,
In the disassembly tool for a fastening member according to 13, 14, or 15, the compression member has a fitting portion that fits into a shaft hole formed in the fastening member that is substantially coaxial with a body of the fastening member. It is characterized by having.

In this disassembly tool, when the fitting portion of the compression member is fitted into a shaft hole formed in the fastening member, the cutting blade is cut when the fastening portion of the fastening member is cut. Since the position is determined, the cutting position of the cutting blade does not shift, and the trunk portion and the flange portion can be separated at an accurate position.

The invention according to claim 17 is based on claims 11, 12,
In the disassembly tool for a fastening member of 13, 14, 15, or 16, the cutting blade is disposed on a cutting blade support that supports the cutting blade so as to be able to advance and retreat along a central axis direction of a fastening hole of the base material. Provided, and the cutting force accumulated in the cutting force urging means causes the cutting edge of the cutting blade to at least reach the boundary surface between the flange portion of the fastening member and the base material, It is characterized in that it has a restricting portion that is locked by a locking portion formed on the cutting blade support and restricts the movement of the cutting blade.

In this disassembly tool, the restricting portion that restricts the movement of the cutting blade when the cutting edge of the cutting blade has reached at least the boundary surface between the flange portion of the fastening member and the base material is provided. The cutting blade is stopped by the locking portion formed on the cutting blade support, and the movement of the cutting blade is stopped. Thereby, damage to the base material by the cutting blade is reliably avoided.

Here, the state in which the cutting edge of the cutting blade has almost reached the boundary surface between the flange portion of the fastening member and the base material means that the flange portion and the trunk portion of the fastening member are completely separated. Or a connected state while leaving a slight meat portion.

The invention according to claim 18 is the disassembly tool for a fastening member according to claim 17, wherein the cutting blade support has a through hole through which a shaft portion of the compression member is inserted, and the through hole has a through hole. When the shaft portion of the inserted compression member is pulled up by the fastening shaft grip portion of the fastening tool, a bearing for supporting the distal end portion of the fastening tool against the cutting force accumulated in the cutting force urging means. It has a part.

In this disassembly tool, when the shaft portion of the compression member inserted into the through hole of the cutting blade support is pulled up by the fastening shaft holding portion of the fastening tool, the cutting force urging means is used. The tip of the fastening tool is supported by the bearing against the accumulated cutting force. Thereby, the shaft portion of the compression member is pulled up by the fastening shaft grip portion of the fastening tool, so that the cutting force urging means is reliably compressed, and the cutting force is accumulated in the cutting force urging means without waste. Is done.

According to a nineteenth aspect of the present invention, in the disassembling tool for the fastening member according to the eighteenth aspect, the supporting portion of the cutting blade support includes:
It is characterized in that the tip of the fastening tool is formed in a shape to be fitted.

In this disassembly tool, the tip of the fastening tool is supported by fitting to the support of the cutting blade support. Thereby, the tip of the fastening tool and the support of the cutting blade support are fixed, so that when the shaft of the compression member is pulled up by the fastening shaft grip of the fastening tool, the tip of the fastening tool is pulled up. The positional relationship between the portion and the bearing portion does not shift, and the tip of the fastening tool does not tilt with respect to the bearing portion.

Therefore, in this disassembly tool, the shaft portion of the compression member is smoothly pulled up by the fastening shaft holding portion of the fastening tool without being inclined with respect to the through hole of the cutting blade support. Occurrence of an operation error during the disassembling operation of the disassembly tool is suppressed, and the operability of the disassembly tool is improved.

According to the twentieth aspect of the present invention,
Alternatively, in the disassembly tool for a fastening member, the cutting blade support has a contact portion that abuts on the base material when the fastening portion of the fastening member is cut by the cutting blade. It is characterized by the following.

In this disassembly tool, when the fastening portion of the fastening member is cut, the contact portion of the cutting blade support comes into contact with the base material, so that the position of the cutting blade support and the base material is reduced. The relationship, that is, the positional relationship between the base material and the cutting blade is always kept constant. Thus, depending on the manner in which the operator holds the fastening tool during the cutting, the position of the cutting blade support is shifted by the reaction force of the cutting force urged to the cutting blade, and the moving stroke of the cutting blade Or the center of the cutting blade is displaced from the center of the fastening portion of the fastening member, or the moving direction of the cutting blade is inclined with respect to the axial direction of the fastening hole of the base material. Is prevented.

According to the twenty-first aspect of the present invention, the body is inserted into a fastening hole formed in the base material and the head integrally formed with the body contacts the peripheral portion of the fastening hole. Blind rivet fastened to a material, and having a cylindrical shape in which a boundary region between the trunk and the head has a cylindrical shape substantially parallel to an outer peripheral surface of the trunk, the diameter of which is equal to or less than the diameter of the fastening hole, An attachment structure that is connected to a blind rivet fastening device for fastening to the base material and disassembles the blind rivet fastened to the base material, wherein one is opened along the axial direction of the body and the other is opened. A cylindrical main body cover provided with a bottom portion, and a cylindrical shape having one opened along the axial direction of the body portion and the other provided with a bottom portion,
A cutting blade whose outer diameter is equal to or less than the hole diameter of the fastening hole and whose inner diameter is equal to or less than the outer diameter of the body, between the inner surface of the bottom of the main body cover and the outer surface of the bottom of the cutting blade. An elastic member provided between the bottom portion of the cutting blade and the bottom portion of the main body cover, and a portion protruding from the bottom of the main body cover to the outside of the cylinder is gripped by the blind rivet fastening device, And a tension shaft provided with an engaging portion that engages with the inner surface of the cylinder at the bottom of the cutting blade.

In this attachment structure, the shaft portion of the tension shaft projecting from the bottom of the main body cover is gripped and pulled by the blind rivet fastening device.
The engaging portion of the pulling shaft engages with the bottom of the cutting blade to bring the cutting blade closer to the main body cover against the elastic reaction force of the elastic member. Thereby, elastic energy based on compression is accumulated in the elastic member sandwiched between the bottom of the cutting blade and the bottom of the main body cover,
By using this elastic energy as the cutting force of the cutting blade, the boundary region of the blind rivet is cut by the cutting blade. Here, the cutting force (elastic energy)
The use of a blind rivet fastening device can reduce the burden on the operator when accumulating, and the configuration can be simplified and the cost can be reduced by using an existing blind rivet fastening device.

According to a twenty-second aspect of the present invention, in the attachment structure of the twenty-first aspect, the shaft portion is provided with a broken portion on a cutting blade side of a portion gripped by the blind rivet setting device. It is assumed that.

In this attachment structure, when the cutting force accumulated in the elastic member becomes a predetermined value or more and the elastic reaction force received by the tension shaft exceeds a certain magnitude, the shaft portion of the tension shaft is broken at the break point. Break. Since this break point is located closer to the cutting blade than the part gripped by the blind rivet fastening device, the cutting force is released as the break point breaks, the cutting blade moves, and cuts the boundary area of the blind rivet I do. Therefore, in the disassembly tool using this attachment structure, a mechanism for locking the cutting blade in a state where the cutting force is accumulated as in the disassembly tool 100A is not required, so that the structure can be further simplified. it can.

According to a twenty-third aspect of the present invention, in the attachment structure of the twenty-second aspect, a plurality of the break locations are provided along an axial direction of the shaft portion, and each break location has a break limit as it goes toward the cutting blade. It is characterized by being larger.

In this attachment structure, a plurality of breaks can be sequentially broken from the side closer to the blind rivet setting device by pulling the tension shaft by the blind rivet setting device. Can be used repeatedly,
The cost required for the disassembling operation can be reduced.

According to a twenty-fourth aspect of the present invention, in the attachment structure of the twenty-first aspect, the main body cover is brought into contact with a head of the base material or the blind rivet to attach the main body cover to the base material or the blind rivet. A holding portion for positioning and holding the holding member is provided.

In this attachment structure, the boundary region of the blind rivet can be cut in a state where the holding portion contacts the base material or the head of the blind rivet and the main body cover is positioned. Is kept constant, the cutting is stable, and the trunk and head can be reliably separated.

According to a twenty-fifth aspect of the present invention, in the attachment structure of the twenty-fourth aspect, the holding portion is attached to the main body cover by screwing, and the main body cover and the holding portion extend along the axial direction of the trunk portion. The relative position is adjustable.

In this attachment structure, the position of the cutting blade with respect to the blind rivet can be adjusted by adjusting the relative position between the main body cover and the holding portion along the axial direction. The cutting stroke can be adjusted. For this reason,
There is no need to prepare a large number of tools with different cutting strokes for each dimension of the boundary area of the blind rivet to be cut.In addition, even if the cutting edge of the cutting blade is shaved and the size of the cutting blade changes, cutting is performed. The stroke can be kept constant.

The invention according to a twenty-sixth aspect is characterized in that, in the attachment structure according to the twenty-fourth aspect, a portion of the holding portion that contacts the base material or the head of the blind rivet has a magnetic force.

In this attachment structure, the holding portion is attracted by magnetic force to the head of the base material or the blind rivet and abuts on the base material or the blind rivet. The positional deviation of the cutting blade at the time is less likely to occur, and the positional accuracy and hence the cutting accuracy are improved. Further, since the attachment structure or the blind rivet fastening device to which the attachment structure is connected can be brought into close contact with the base material without strongly holding the operator, the burden on the operator at the time of cutting is reduced.

According to a twenty-seventh aspect of the present invention, in the attachment structure of the twenty-first aspect, a locking portion is provided on the main body cover so as to be located on an outer periphery of the cutting blade, and the locking portion is provided on the cutting blade. A restricting portion for locking is provided, and when the locking portion is locked to the restricting portion, a movement stroke of the cutting blade which is urged by the elastic member and moves in a direction away from the main body cover is restricted. In addition, the cutting blade is prevented from falling off from the main body cover.

In this attachment structure, the movement stroke of the cutting blade, which is urged by the elastic member and moves in the direction away from the main body cover, is restricted by the locking portion being locked to the restricting portion. Is prevented from falling off from the main body cover, the damage of the base material by the cutting blade can be reliably avoided, and an accident that may occur due to the falling of the cutting blade can be prevented.

According to a twenty-eighth aspect of the present invention, in the attachment structure of the twenty-first aspect, the blind rivet has a shaft hole in the center of the head, and the tension shaft has a shaft diameter smaller than the hole diameter of the shaft hole. And a positioning portion that protrudes from the tip of the cutting blade in the cutting direction and that fits into the shaft hole is formed.

In this attachment structure, the cutting position of the cutting blade can be positioned by fitting the positioning portion into the shaft hole of the head, so that the body and head of the blind rivet can be accurately positioned. Can be cut and separated.

According to a twenty-ninth aspect of the present invention, in the attachment structure of the twenty-first aspect, the outer peripheral surface of the cutting edge of the cutting blade has an inclined surface that is gradually inclined toward the tip in the cutting direction. Things.

In this attachment structure, since the outer peripheral surface of the cutting edge of the cutting blade is gradually inclined toward the tip in the cutting direction, the cutting surface on the head side of the blind rivet has a mortar shape. It becomes difficult for the head after cutting to bite into the cutting blade. With this, when the cutting blade moves in the direction opposite to the cutting direction after cutting and returns to the original position,
The influence of the frictional force due to the biting of the head can be suppressed, and the head can be easily and smoothly extracted from the cutting blade.

The invention according to claim 30 is characterized in that the body is inserted into the fastening hole formed in the base material and the head integrated with the body contacts the peripheral portion of the fastening hole. A fastening member fastened to a material, and wherein a boundary region between the body and the head has a cylindrical shape substantially parallel to an outer peripheral surface of the body and has a diameter equal to or less than a hole diameter of the fastening hole, A method of disassembling a fastening member to be removed from a base material by a disassembly tool, wherein a cutting blade having substantially the same diameter as the boundary region is separated from the fastening member by grasping a tension shaft substantially integrally formed with the cutting blade. By pulling in the direction, the cutting blade accumulates a cutting force for cutting the fastening member, and releases the accumulated cutting force by breaking the tension shaft during the pulling movement to release the cutting blade. Moving towards the fastening member By cutting the boundary region by the cutting blade, it is characterized in that detaching the fastening member from the base material.

In this disassembling method, the cutting blade accumulates a cutting force for cutting the fastening member by grasping the pulling shaft having a substantially integral structure with the cutting blade and pulling the pulling shaft away from the fastening member. By using an existing tool such as a blind rivet fastening device for the pulling operation, the burden on the operator can be reduced.

Further, since the cutting shaft is broken during the pulling movement to release the cutting force, there is no need to lock the cutting blade in a state where the cutting force is accumulated as in the disassembly tool 100A. The structure of the tool can be simplified.

[0114]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a disassembly tool to which the present invention is applied will be described below.

The disassembly tool according to the present embodiment can be any type of fastening member that is used for mechanical fastening such as pin fastening, rivet fastening, and burring swaging described above. Although it is possible to disassemble, the blind rivet 10 as shown in FIG.

FIG. 1 shows a disassembly tool 10 according to this embodiment.
0B shows a schematic configuration.

As shown in FIG. 1, the disassembly tool 100B is arranged along the body axis direction of the body 11b and the flange (head) 11c of the blind rivet 10.
Cutting blade 102 for cutting 1b and flange portion 11c;
The body 11b and the flange 1 of the blind rivet 10
And a cutting force applying unit 400 for applying a cutting force to the cutting blade 102 to cut the cutting blade 1c.

As the cutting blade 102, the same one as the cutting blade 102 of the disassembly tool 100A can be used, and the outer peripheral surface of the cutting edge portion 104 has an inclined surface 104a gradually inclined toward the tip in the cutting direction. Has become. As a result, the cut surface of the blind rivet 10 on the flange portion 11c side becomes a mortar shape, and the cut flange portion 11c becomes difficult to bite into the cutting blade 102.
When 02 moves in the direction opposite to the cutting direction and returns to the original position, the influence of the frictional force due to the biting of the flange portion 11c can be suppressed, and the flange portion 11c is easily and smoothly extracted from the cutting blade 102. be able to.

On the other hand, the cutting force applying means 400 of the disassembling tool 100B can accumulate the cutting force applied to the cutting blade 102, and release the accumulated cutting force so that the cutting force is applied to the blind rivet 10. The cutting blade 1
02, a cutting force urging means 410 for urging the cutting force, a cutting force accumulating means 420 for accumulating the cutting force applied to the cutting blade 102 in the cutting force urging means 410, and a cutting force accumulating means. The cutting force accumulated in the cutting force urging means 410 by the 420 is applied to the body 11 of the blind rivet 10.
The cutting force releasing means 430 releases the cutting force accumulated in the cutting force urging means 410 when the cutting force reaches a value at which the cutting force b can be cut.

The cutting force urging means 410 is made of a member having a property of accumulating a cutting force applied to the cutting blade 102 by being compressed. As the cutting force urging means 410, for example, an elastic member such as a coil spring, a leaf spring, rubber, or an air spring can be used. The disassembly tool 100B of the present embodiment shows an example in which a coil spring (elastic member) is used as the cutting force urging means 410 (hereinafter, this coil spring is also denoted by reference numeral 410).

The cutting force accumulating means 420 includes a compression member (tensile shaft) 421 for compressing the coil spring as the cutting force urging means 410 and the coil spring 4.
And compression member moving means 422 for moving the compression member 421 in the direction of compressing the compression member 10.

The compression member 421 of the disassembly tool 100B of this embodiment includes a rod-shaped shaft 421a and the shaft 421.
a, and a flange-shaped engaging portion 421b integrally formed with the main body a.

As shown in FIG. 1, the shaft 421a of the compression member 421 is connected to the end wall (bottom) 10 of the cutting blade 102.
5 and the disassembly tool 100
A, a cutting blade support 20 supporting the cutting blade 102
0 is inserted through a through-hole 201a formed in the end wall (bottom) 201. Also, this shaft portion 421a is
The cutting blade support 200 has a length such that its upper end protrudes from the end wall 201 of the cutting blade support 200 in a state of being inserted through the cutting blade support 05a and 201a.

On the other hand, the engaging portion 421b of the compression member 421
Is formed to have a size that engages with the lower surface of the end wall 105 of the cutting blade 102 with the shaft portion 421a inserted into the through holes 105a and 201a.

The compression member moving means 422 of the disassembling tool 100B holds the upper end of the shaft 421a inserted through the through holes 105a and 201a and protruding from the end wall 201 of the cutting blade support 200. The shaft 4
The upper end of 21a is configured to be pulled up in FIG.

Further, the cutting force releasing means 430 of the disassembling tool 100B applies the force to the coil spring 410 while the compression member 421 is pulled up by the compression member moving means 422 and the coil spring 410 is compressed. The compression member 421 is configured to be broken (broken portion) formed to be broken by losing the accumulated cutting force (hereinafter, this broken portion is denoted by reference numeral 430).

The blind rivet 10 fastened to the base materials 1 and 2 using the disassembling apparatus 100B constructed as described above.
To disassemble, first, as shown in FIG. 1, the shaft portion 421a of the compression member 421 is connected to the end wall 10 of the cutting blade 102.
5 and the disassembly tool 100
A, a cutting blade support 20 for supporting the cutting blade 102
0 through the through hole 201a formed in the end wall 201. Then, the shaft portion 4 inserted through the through holes 105a and 201a and protruding from the end wall 201 of the cutting blade support 200.
The upper end of 21a is gripped by the compression member moving means 422.

Then, as shown in FIG. 2A, the cutting edge 103 of the cutting blade 102 of the disassembling tool 100B is made to face the boundary area A between the body 11b of the blind rivet 10 and the flange 11c. At this time, the cutting blade support 2
00 is set in a state where the cutting edge 103 of the cutting blade 102 faces the boundary region A between the body 11b and the flange 11c of the blind rivet 10.

Next, by the compression member moving means 422,
The shaft 421a of the compression member 421 protruding from the cutting blade support 200 is pulled up. Thereby, the engaging portion 421b of the compression member 421 is moved to the end wall 105 of the cutting blade 102.
Engages the lower surface of. Then, in this state, the shaft 421
2B, the cutting blade 102 is pulled up, and the coil spring 410 is compressed, as shown in FIG. 2B.
The cutting force is accumulated.

When the cutting force accumulated in the coil spring 410 reaches a value at which the body portion 11b and the flange portion 11c of the blind rivet 10 can be cut, the breaking portion 430 formed on the compression member 421 is turned off. 2C, the coil spring 410 is broken by the cutting force accumulated in the coil spring 410. Thereby, the cutting force accumulated in the coil spring 410 is released.

When the cutting force accumulated in the coil spring 410 is released, the cutting blade 10 is moved toward the blind rivet 10 by the coil spring 410.
2, the cutting force is applied. Thereby, the cutting blade 102
Cuts along the body axis direction of the body part 11b and the flange part 11c of the blind rivet 10, and the body part 11b and the flange part 11c are cut by the cutting blade 102 as shown in FIG. Is done.

As described above, in the disassembling tool 100B, the cutting force applied to the cutting blade 102 is increased by the cutting force urging means 410 by the cutting force accumulating means 420.
As a coil spring. Therefore, in the disassembling tool 100B, it is not necessary to accumulate the cutting force applied to the cutting blade 102 by the operator's force,
The burden on the operator when cutting the fastening portion of the blind rivet 10 is reduced.

In the process in which the compression member 421 is moved by the compression member moving means 422 and the cutting force is accumulated in the coil spring 410, the compression member 421 is moved.
Is formed in the coil spring 410
By losing due to the cutting force accumulated in the
The cutting force accumulated in the coil spring 410 is released. Therefore, in the disassembly tool 100B, a mechanism for locking the cutting blade 102 is not required unlike the disassembly tool 100A in a state where the cutting force is accumulated in the coil spring 410, so that the structure is further simplified. can do.

Here, as the cutting blade 102, for example, as shown in FIG. 3 and FIG.
a, it has a small diameter of the cutting edge 103 than the inner diameter d _1, d ₂ of 2a, and the cylinders of the cylinder portion 11b and the flange portion 11c of the blind rivet 10 is substantially parallel to the fastening holes 1a, the inner peripheral surface of 2a A tool having a substantially cylindrical cutting edge 104 along the axial direction (the direction in which the boundary area A extends) may be used.

The outer diameter d of the cutting edge 104 of the cutting blade 102
_3, it is preferably formed slightly larger than the outer diameter d ₄ of the body portion 11b of the blind rivet 10.

In the case where the cutting blade 102 is used, when the cutting portion of the blind rivet 10 is cut by the cutting blade 102, the cutting edge 104 of the cutting blade 102 , 2a, the cutting blades 102 prevent the base materials 1, 2 from being damaged.

The cutting force accumulating means 42 for compressing the coil spring as the cutting force urging means 410
As shown in FIG. 5, the zero compression member 421 is configured to be detachable from the compression member moving means 422 for moving the compression member 421, and is formed integrally with the cutting blade 102. There may be.

As described above, by integrally forming the compression member 421 and the cutting blade 102, the cutting blade 102 can move the compression member 421 with respect to the compression member moving means 422.
It is attached and detached together. This eliminates the need to directly support the cutting blade 102 on the cutting blade support 200, so that the structure of the cutting blade support 200 can be simplified.

As shown in FIG. 1, the compression member 421 is fitted into a shaft hole 11a through which a mandrel 12 formed in the body 11b of the blind rivet 10 is inserted. When cutting the fastening portion, a centering shaft 421d as a cutting blade positioning member (fitting portion, positioning portion) for positioning the cutting position of the cutting blade 102 with respect to the fastening portion is integrally formed.

This centering shaft 421d is
As shown in (a), when cutting the fastening portion of the blind rivet 10, the blind rivet 10 is fitted into the shaft hole 11 a of the flange portion 11 c of the blind rivet 10.

As described above, when the centering shaft 421d is fitted into the shaft hole 11a of the flange portion 11c, the cutting position of the cutting blade 102 is determined when cutting the fastening portion of the blind rivet 10. Therefore, the cutting position of the cutting blade 102 is prevented from being shifted, and the body 11b and the flange 11c can be separated at an accurate position.

Further, since the centering shaft 421d is integrally formed with the compression member 421, it is not necessary to dispose the centering shaft 421d as an independent part on the cutting blade 102, and the shape of the cutting blade 102 is simplified. Thus, the number of parts can be reduced.

FIG. 6 shows a disassembly tool 100C according to another embodiment of the present invention.

As shown in FIG. 16, this disassembly tool 100C uses a riveting tool 13 as a fastening tool (a blind rivet fastening device) for fastening the blind rivet 10 to the base materials 1 and 2, and 2 is a disassembly tool for removing the fastening members fastened to the base materials 1 and 2.

That is, the illustrated disassembly tool 100C is provided with the compression member moving means 422 of the disassembly tool 100B shown in FIG.
In other words, an attachment structure for disassembling the blind rivet 10 fastened to the base materials 1 and 2 is connected to the riveting tool 13.

In this disassembly tool 100C, the same members as those of the disassembly tool 100B have the same configurations and functions as those of the disassembly tool 100B. A detailed description of this common member will be omitted.

Using the disassembly tool 100C, the base materials 1, 2
To disassemble the blind rivet 10 fastened to
As in the case of the disassembly tool 100B, first, the shaft 421a of the compression member 421 is attached to the end wall 10 of the cutting blade 102.
5 and the cutting blade support 2
00 through the through hole 201a formed in the end wall 201.

Then, as shown in FIG. 6, the upper end of the shaft 421a of the compression member 421 inserted through the through holes 105a and 201a and protruding from the end wall 201 of the cutting blade support 200 is connected to the above riveting tool. 13 nose piece 13a. At this time, the shaft 421a of the compression member 421 is moved so that the tip of the nose piece 13a of the riveting tool 13 is in close contact with the upper surface of the end wall 201 of the cutting blade support 200.
Set to 3.

Next, as shown in FIG. 7A, the cutting edge 103 of the cutting blade 102 of the disassembling tool 100C is made to face the boundary region A between the body 11b of the blind rivet 10 and the flange 11c. Then, in this state, the trigger (not shown) of the riveting tool 13 is pulled. Thus, the shaft 421a of the compression member 421 protruding from the cutting blade support 200 is gripped and pulled up by the jaw 13b of the riveting tool 13 as a fastening shaft gripper for gripping the shaft 421a of the compression member 421. Can be Then, the engaging portion 421b of the compression member 421 is engaged with the lower surface of the end wall 105 of the cutting blade 102, and in this state, the shaft portion 421a is further pulled up, as shown in FIG. The cutting blade 102 is raised, and the coil spring 410 is compressed, so that the coil spring 41
The cutting force is accumulated at zero.

When the cutting force accumulated in the coil spring 410 reaches a value at which the body 11b and the flange 11c of the blind rivet 10 can be cut, the breaking portion 430 formed on the compression member 421 is turned off. As shown in FIG. 7C, the coil spring 410 is broken by the cutting force accumulated in the coil spring 410. Thereby, the cutting force accumulated in the coil spring 410 is released.

When the cutting force accumulated in the coil spring 410 is released, the cutting blade 10 is moved toward the blind rivet 10 by the coil spring 410.
2, the cutting force is applied. Thereby, the cutting blade 102
Cuts along the body axis direction of the body part 11b and the flange part 11c of the blind rivet 10, and the body part 11b and the flange part 11c are cut by the cutting blade 102 as shown in FIG. Is done.

In the disassembly tool 100C, the existing riveting tool 13 is used to compress the coil spring as the cutting force urging means 410, and to apply the cutting force to the coil spring 410 to urge the cutting blade 102. Can be stored, so that the configuration can be further simplified.

In the disassembly tool 100C,
As shown in FIG. 7 (b), the riveting tool 1
The tip of the nose piece 13a is the cutting blade support 2
00 in a state in which the compression member 421 is in close contact with the upper surface of the end wall 201 by the jaw 13b of the riveting tool 13.
The shaft portion 421a is grasped and pulled up, so that the cutting blade support 200 is
3

Therefore, in the disassembly tool 100C, the cutting edge 102 of the cutting blade 102 is faced to the boundary area A between the body 11b and the flange 11c of the blind rivet 10, and the disassembly tool 100B is used. Blade support 2
Since there is no need to fix 00, the operability can be improved.

Here, as for the compression member 421, as shown in FIG.
a at predetermined intervals (4 in the example shown)
It is also possible to use a riveting tool that is formed so as to be broken in order from the side close to the jaw 13b of the riveting tool 13.

When the compression member 421 is used, as shown in FIG. 8, the nose piece 13a of the riveting tool 13 and the end wall 201 of the cutting blade support 200 are used.
A predetermined number of nose collars 13c having a height substantially equal to the interval between the break portions 430 of the compression member 421 are disposed between the rivet tool 13 and the shaft 421a of the compression member 421. The position to be pulled up can be selected by the jaw 13b.

When the compression member 421 having such a configuration is used, the shaft portion 421a of the compression member 421 is mounted on the jaw 13b of the riveting tool 13 and pulled up. Can be sequentially broken from the side of the riveting tool 13 closer to the jaw 13b.

Accordingly, the compression member 421 can be used repeatedly by the number of the break portions 430, and the compression member 421 can be saved.

In the compression member 421, a plurality of broken portions 430 having different strengths (different breaking limits) formed on the shaft portion 421a are selectively gripped by the jaws 13b of the riveting tool 13. By breaking, the magnitude of the cutting force accumulated in the coil spring 410 can be changed. This allows
The magnitude of the cutting force can be selected according to the strength of the body 11b and the flange 11c of the blind rivet 10.

Further, as the compressing member 421, the breaking portion 430 is engaged with the cutting blade 102, and the engaging portion 421b of the compressing member 421 pulls up the cutting blade 102.
And the shank 421a of the compression member 421, and the compression member 421 is formed in a shape that is separated from the cutting blade 102 by breaking the break portion 430. Is also good.

As the compression member 421, FIG.
As shown in FIG. 8 to FIG. 8, when the mandrel 12 formed in the body 11b of the blind rivet 10 is fitted into the shaft hole 11a through which the blind rivet 10 is cut, Cutting blade 102 for the part
The centering shaft 421d for positioning the cutting position may be integrally formed.

Note that the cutting blade 10 of the disassembly tool 100C
As shown in FIG. 9, the cutting stroke at the time of cutting the fastening member 2 is such that the cutting edge 102 of the cutting blade 102 is at least connected to the flange 11 c of the blind rivet 10 by the cutting force applied to the cutting blade 102. The outer peripheral surface (here, the inclined surface 104a) of the cutting edge portion 104 of the cutting blade 102 reaches the vicinity of the boundary surface with the base material 1, and
It is desirable that the setting is made such that the movement of the cutting blade 102 is stopped in a state where it is located near the edge of the fastening hole 1a of the base material 1.

Therefore, in this disassembly tool 100C, as shown in FIG. 7D, a regulating portion 106 formed in a stepped shape on the outer peripheral surface of the cutting blade 102 is attached to the inner peripheral surface of the cutting blade support 200. The movement of the cutting blade 102 is stopped at a predetermined position shown in FIG. 9 by being locked by a locking portion 206 formed in a step shape on the surface.

As a result, as shown in FIG. 9, the cutting force causes the cutting edge 103 of the cutting blade 102 to reach at least the vicinity of the boundary between the flange portion 11c of the blind rivet 10 and the base material 1. And the cutting blade 1
02 is formed with a fastening hole 1 a of the base material 1.
The movement of the cutting blade 102 can be stopped in a state where the cutting blade 102 is located near the edge of the base material 1, and damage to the base material 1 by the cutting blade 102 can be reliably avoided.

Here, the cutting edge 103 of the cutting blade 102
However, the state in which the flange portion 11c of the blind rivet 10 and the boundary surface between the base material 1 are substantially reached means that the flange portion 11c and the body portion 11b of the blind rivet 10 are completely separated, or Any of the connected states except for a slight meat portion may be used.

On the other hand, as shown in FIG. 6, the end wall 201 of the cutting blade support 200 of the disassembling tool 100C has a through hole 201a through which the shaft 421a of the compression member 421 is inserted. The upper surface is the through hole 201a.
The shaft portion 421a inserted into the riveting tool 13
The support 2 supports the nose piece 13a of the riveting tool 13 against the cutting force accumulated in the coil spring 410 when pulled up by the jaw 13b.
07.

As described above, the shaft 4 of the compression member 421
By supporting the nose piece 13a of the riveting tool 13 by the support portion 207 when the 21a is lifted by the jaw 13b of the riveting tool 13, the coil spring 410 can be reliably compressed, and the cutting force is wasted on the coil spring 410. It can be accumulated without.

The support 207 of the cutting blade support 200
For example, as shown in FIG. 10, it is preferable that the nose piece 13a of the riveting tool 13 is formed in a shape to be fitted.

As described above, the nose piece 13a of the riveting tool 13 is fitted and supported by the support portion 207, whereby the shaft portion 42 of the compression member 421 is supported.
When 1a is pulled up by the jaw 13b of the riveting tool 13, the nose piece 13a of the riveting tool 13 does not fall off from the support portion 207, and the operability of the disassembling tool 100C is improved.

The support 2 of the cutting blade support 200
Reference numeral 07 denotes, for example, as shown in FIG. 11, formed in a pipe shape so as to be screwed to the outer peripheral surface of the cylindrical case 13d in which the jaw 13b of the riveting tool 13 is housed. You may.

As described above, by screwing the support 207 formed in a pipe shape to the outer peripheral surface 13d of the cylindrical case of the riveting tool 13, the cylindrical case 13d of the riveting tool 13 and the support 207 can be adjusted. Thus, the position of the shaft portion 421a of the compression member 421 to be pulled up by the jaw 13b of the riveting tool 13 can be selected without using the nose collar 13c as shown in FIG.

FIG. 12 shows a disassembly tool 100D according to still another embodiment of the present invention.

The disassembly tool 100D has its cutting blade 10
2 has a contact member (holding portion) 500 that comes into contact with the base materials 1 and 2 when cutting the fastening portion of the blind rivet 10.

In the disassembly tool 100D, FIG.
As shown in FIG. 7, when the fastening portion of the blind rivet 10 is cut, the contact member 500 provided on the cutting blade support 200 contacts the base material 1.

Thus, the positional relationship between the cutting blade support 200 and the base material 1, that is, the positional relationship between the base material 1 and the cutting blade 102 is always kept constant.

Thus, depending on the manner in which the operator holds the riveting tool 13 during the cutting, the position of the cutting blade support 200 is shifted due to the reaction force of the cutting force applied to the cutting blade 102, and The moving stroke of the cutting blade 102 changes, the center of the cutting blade 102 is displaced from the center of the flange portion 11c, or the cutting blade 102
Is not inclined with respect to the axial direction of the fastening holes 1a, 2a of the base materials 1, 2.

Accordingly, in the disassembly tool 100D, the blind rivet 10 fastened to the base materials 1 and 2
Can be smoothly and reliably removed from the base materials 1 and 2 without damaging the base materials 1 and 2.

In the disassembly tool 100D, it is desirable that the contact portion 501 of the contact member 500 that contacts the base material 1 has a magnetic force to be attracted to the base material 1.

In the disassembly tool 100D having such a structure, when the fastening portion of the blind rivet 10 is cut, the contact portion 501 of the contact member 500 is connected to the base material 1.
Can be contacted by magnetic force. Thereby, the adhesion between the contact portion 501 of the contact member 500 and the base material 1 is increased, and the positional accuracy between the cutting blade 102 and the base materials 1 and 2 during the cutting is improved. Further, since the contact portion 501 of the contact member 500 can be brought into close contact with the base material 1 without holding the disassembling tool 100D at the time of the cutting, the burden on the operator at the time of the cutting is reduced. It is reduced.

As a method of giving a magnetic force to the contact portion 501 of the contact member 500, the contact member 500 is constituted by a magnet (permanent magnet) or
The contact portion 501 may be magnetized by mixing a magnetic material into the contact portion 501.

Here, the contact portion 50 of the contact member 500
The magnetic force of 1 abuts on the cutting blade support 200 against the reaction force of the cutting force applied to the cutting blade 102 by the coil spring 410 when the fastening portion of the blind rivet 10 is cut. It is desirable that the contact portion 501 of the member 500 has a magnitude equal to or larger than the force for bringing the contact portion 501 into contact with the base material 1.

It is preferable that the abutment member 500 is configured to be detachable and replaceable from the cutting blade support 200.

That is, by configuring the contact member 500 to be attachable / detachable with respect to the cutting blade support 200, only the contact member 500 can be replaced.
The moving stroke of the cutting blade 102 can be changed according to the size of the fastening portion to be disassembled so as to match the size of the fastening portion. Therefore, the moving stroke of the cutting blade 102 for each size of the fastening portion It is not necessary to prepare a large number of dedicated disassembly tools different from each other.

Further, it is preferable that the contact member 500 is configured to be able to advance and retreat with respect to the cutting blade support 200 along the cutting direction of the cutting blade 102.

That is, by configuring the contact member 500 to be able to advance and retreat with respect to the cutting blade support 200 along the cutting direction of the cutting blade 102, for example,
Even when the size of the cutting edge portion 104 in the cutting direction changes due to polishing or the like of the cutting edge 103, the cutting blade support 200
By moving the contact portion 501 of the contact member 500 forward and backward along the cutting direction of the cutting blade 102, the position of the cutting edge 103 is adjusted so that the cutting edge 103 of the cutting blade 102 always faces a fixed position. Can be adjusted.

Further, by moving the contact portion 501 of the contact member 500 along the cutting direction of the cutting blade 102, the contact member 500 can be replaced without changing the contact member 500, depending on the size of the fastening portion to be disassembled. Thus, the moving stroke of the cutting blade 102 can be changed to match the size of the fastening portion.

Here, as described above, as a structure for moving the contact portion 501 of the contact member 500 along the cutting direction of the cutting blade 102, for example, as shown in FIG. What is necessary is just to comprise so that the said contact member 500 may be screwed to the body 200 with the screw 502.

[0188]

According to the first to tenth aspects of the present invention, it is not necessary to accumulate the cutting force applied to the cutting blade by an operator's force. The burden can be reduced. Further, in this disassembly tool, there is no need to lock the cutting blade in a state where the cutting force is accumulated in the cutting force urging means, so that there is an excellent effect that the structure can be simplified.

In particular, according to the invention of claim 4, the structure for supporting the cutting blade is unnecessary or simple.
There is an excellent effect that the structure of the disassembly tool can be simplified.

According to the fifth aspect of the present invention, when the fastening portion of the fastening member is cut by the cutting blade, the cutting edge of the cutting blade is located inside the fastening hole of the base material. There is an excellent effect that the base material is prevented from being damaged by the cutting blade.

According to the sixth aspect of the present invention, the cutting blade positioning member is fitted into the shaft hole of the flange portion, so that the cutting blade can be cut when cutting the fastening portion of the fastening member. Since the position is determined, there is an excellent effect that the cutting position of the cutting blade does not shift, and the trunk portion and the flange portion can be separated at an accurate position.

According to the seventh aspect of the present invention, since the cutting blade positioning member is formed integrally with the compression member, it is not necessary to dispose the cutting blade positioning member as an independent component on the cutting blade. Further, there is an excellent effect that the shape of the cutting blade is simplified and the number of parts can be reduced.

According to the eighth and ninth aspects of the present invention, the fastening portion of the fastening member is cut by the cutting blade in a state where the contact member is in contact with the base material, and the fastening member is cut. Since the separation distance between the base material and the cutting edge of the cutting blade at the time of cutting the fastening portion is kept constant, the cutting stroke of the cutting blade at the time of cutting the fastening portion of the fastening member becomes constant, There is an excellent effect that the body part and the flange part can be reliably separated.

According to the tenth aspect of the present invention, when the fastening part of the fastening member is cut, the contact part of the contact member is
Since the base material is attracted to the base material by magnetic force and is brought into contact with the base material, the adhesion between the contact portion of the contact member and the base material is enhanced, and the positional accuracy between the cutting blade and the base material during the cutting can be improved. Further, since the contact portion of the contact member can be brought into close contact with the base material without the operator holding the disassembling tool at the time of the cutting, the burden on the operator at the time of the cutting can be reduced. Has an effect.

According to the eleventh to twentieth aspects of the present invention, the cutting force urging means is compressed by the fastening tool, so that the cutting force urging the cutting blade can be accumulated in the cutting force urging means. Moreover, since the cutting tool urges the cutting force to the cutting blade by breaking the breaking portion of the compression member with the fastening tool, it is possible to reduce the burden on the operator when cutting the fastening portion of the fastening member, In addition, there is no need for a mechanism for locking the cutting blade in a state where the cutting force is accumulated in the cutting force urging means, and there is an excellent effect that the structure can be simplified.

In particular, according to the fourteenth aspect of the present invention, the plurality of shafts of the compression member are attached to the fastening shaft grips of the fastening tool and pulled up, so that a plurality of the shafts of the compression member are formed. Since the broken portion can be sequentially broken from the side closer to the fastening shaft grip portion of the fastening tool, the compression member can be used repeatedly by the number of the broken portions, and the compression member can be saved. In addition, the plurality of broken portions having different strengths formed on the shaft portion of the compression member are selectively gripped and broken by the fastening shaft grip portion of the fastening tool, thereby accumulating in the cutting force urging means. Since the magnitude of the cutting force to be performed can be changed, there is an excellent effect that the magnitude of the cutting force can be selected according to the strength of the trunk portion and the flange portion of the fastening member.

According to the sixteenth aspect of the present invention, when the fitting portion of the compression member is fitted into the shaft hole formed in the fastening member, when the fastening portion of the fastening member is cut,
Since the cutting position of the cutting blade is determined, the cutting position of the cutting blade does not shift, and there is an excellent effect that the trunk portion and the flange portion can be separated at an accurate position.

According to the seventeenth aspect of the present invention, the cutting blade is moved in a state where the cutting edge of the cutting blade substantially reaches at least a boundary surface between the flange portion of the fastening member and the base material. Since the regulating portion for regulating is locked by the locking portion formed on the cutting blade support and the movement of the cutting blade is stopped, it is possible to reliably avoid damage to the base material by the cutting blade. Has an effect.

According to the eighteenth aspect of the present invention, when the shaft portion of the compression member inserted into the through hole of the cutting blade support is pulled up by the fastening shaft holding portion of the fastening tool, the cutting is performed. Since the tip of the fastening tool is supported by the bearing against the cutting force accumulated in the force urging means, the shaft of the compression member is pulled up by the fastening shaft grip of the fastening tool. Accordingly, there is an excellent effect that the cutting force urging means is reliably compressed, and the cutting force can be accumulated in the cutting force urging means without waste.

According to the nineteenth aspect of the present invention, the shaft portion of the compression member is smoothly pulled up by the fastening shaft holding portion of the fastening tool without being inclined with respect to the through hole of the cutting blade support. Therefore, it is possible to suppress the occurrence of an operation error during the disassembling operation of the disassembly tool, and to provide an excellent effect that the operability of the disassembly tool can be improved.

According to the twentieth aspect, the reaction force of the cutting force urged by the cutting blade depends on the manner in which the operator holds the fastening tool when cutting the fastening portion of the fastening member. The position of the cutting blade support is shifted, the moving stroke of the cutting blade changes, and the center of the cutting blade is
Since it is prevented that the center of the fastening portion of the fastening member is displaced or the moving direction of the cutting blade is inclined with respect to the axial direction of the fastening hole of the base material, the fastening member fastened to the base material is removed. In addition, there is an excellent effect that the base material can be smoothly and securely removed from the base material without being damaged.

According to the twenty-first to twenty-ninth aspects of the present invention, the shaft portion of the tension shaft protruding from the bottom of the main body cover is gripped and pulled by the blind rivet fastening device.
The engaging portion of the pulling shaft engages with the bottom of the cutting blade to bring the cutting blade closer to the main body cover against the elastic reaction force of the elastic member. Thereby, elastic energy based on compression is accumulated in the elastic member sandwiched between the bottom of the cutting blade and the bottom of the main body cover,
By using this elastic energy as the cutting force of the cutting blade, the boundary region of the blind rivet is cut by the cutting blade. Here, the cutting force (elastic energy)
The use of a blind rivet fastening device can reduce the burden on the operator when accumulating the oil, and the use of an existing blind rivet fastening device can simplify the configuration and reduce the cost. There is.

In particular, according to the invention of claim 22, when the cutting force accumulated in the elastic member exceeds a predetermined value and the elastic reaction force received by the tension shaft exceeds a certain magnitude, the shaft portion of the tension shaft is Breaks at the break point. Since this break point is located closer to the cutting blade than the part gripped by the blind rivet fastening device, the cutting force is released as the break point breaks, the cutting blade moves, and cuts the boundary area of the blind rivet I do. Therefore, in the disassembly tool using this attachment structure, a mechanism for locking the cutting blade in a state where the cutting force is accumulated as in the disassembly tool 100A is not required, so that the structure can be further simplified. There is an excellent effect that it can be done.

According to the twenty-third aspect of the present invention, a plurality of broken portions can be sequentially broken from the side closer to the blind rivet setting device by pulling the tension shaft by the blind rivet setting device. There is an excellent effect that the number of the tension shafts can be repeatedly used by the number, and the cost required for the disassembling operation can be reduced.

According to the twenty-fourth aspect of the present invention, the boundary region of the blind rivet can be cut in a state where the holding portion is in contact with the base material or the head of the blind rivet and the main body cover is positioned. There is an excellent effect that the moving trajectory of the cutting blade with respect to the blind rivet is kept constant, cutting is stable, and the trunk and the head can be reliably separated.

According to the twenty-fifth aspect of the present invention, the position of the cutting blade with respect to the blind rivet can be adjusted by adjusting the relative position between the main body cover and the holding portion along the axial direction. The cutting stroke of the cutting blade with respect to the area can be adjusted. For this reason, it is not necessary to prepare a large number of tools having different cutting strokes for each dimension of the boundary area of the blind rivet to be cut, and for example, when the cutting edge of the cutting blade is shaved and the size of the cutting blade changes. However, there is an excellent effect that the cutting stroke can be kept constant.

According to the twenty-sixth aspect of the present invention, since the holding portion is attracted to the head of the base material or the blind rivet by magnetic force and abuts, the contact portion of the holding portion and the base material or the blind rivet are in close contact. Therefore, the positional deviation of the cutting blade during cutting is less likely to occur, and the positional accuracy and hence the cutting accuracy are improved. Further, since the attachment structure or the blind rivet fastening device to which the attachment structure is connected can be brought into close contact with the base material without strongly holding the worker, an excellent effect that the burden on the worker during cutting is reduced. is there.

According to the twenty-seventh aspect of the present invention, the movement stroke of the cutting blade, which is urged by the elastic member and moves in the direction away from the main body cover, is restricted by the locking part being locked to the restriction part. In addition, since the cutting blade is prevented from falling off from the main body cover, damage to the base material by the cutting blade can be reliably avoided, and an accident that may occur due to the falling of the cutting blade can be prevented. There is an excellent effect that it can be done.

[0209] According to the twenty-eighth aspect of the present invention, the cutting position of the cutting blade can be determined by fitting the positioning portion into the shaft hole of the head. Can be cut and separated at an accurate position.

According to the twenty-ninth aspect of the present invention, since the outer peripheral surface of the cutting edge of the cutting blade is inclined gradually toward the tip in the cutting direction, the cutting surface on the head side of the blind rivet is formed. It becomes mortar-shaped, and it is difficult for the head after cutting to bite into the cutting blade. Thereby, when the cutting blade moves in the direction opposite to the cutting direction and returns to the original position after cutting, it is possible to suppress the influence of the frictional force due to the biting of the head, and to easily and easily move the head from the cutting blade. There is an excellent effect that it can be extracted smoothly.

According to the thirtieth aspect of the present invention, the cutting blade can reduce the cutting force for cutting the fastening member by gripping the pulling shaft having a substantially integral structure with the cutting blade and pulling the pulling shaft away from the fastening member. Since the accumulation is performed, the burden on the operator can be reduced by using an existing tool such as a blind rivet fastening device for the pulling operation. Further, since the cutting force is released by breaking the pulling shaft during the pulling movement, there is no need to lock the cutting blade in a state where the cutting force is accumulated as in the disassembly tool 100A. Can be simplified.

[Brief description of the drawings]

FIG. 1 is a disassembly tool 1 for a fastening member according to an embodiment of the present invention.
FIG. 14 is a schematic cross-sectional view for explaining the configuration of 00B.

FIGS. 2 (a), (b), (c) and (d) are process diagrams showing a procedure for disassembling a blind rivet by the disassembly tool 100B.

FIG. 3 is a schematic perspective view for explaining another configuration of the cutting blade of the disassembly tool 100B.

FIG. 4 is an essential part cross-sectional view showing a state of a flange portion of a fastening member cut by a cutting blade having another configuration described above.

FIG. 5 is a schematic sectional view for explaining still another configuration of the cutting blade of the disassembly tool 100B.

FIG. 6 is another disassembly tool 100C according to the embodiment of the present invention.
FIG.

FIGS. 7A, 7B, 7C, and 7D are process diagrams showing a procedure for disassembling a blind rivet using the disassembly tool 100C.

FIG. 8 is a schematic sectional view showing another configuration of the compression member in the disassembly tool 100C.

FIG. 9 is an essential part cross-sectional view showing a state of a flange portion of a fastening member cut by a cutting blade of the disassembly tool 100C.

FIG. 10 is a schematic sectional view showing a configuration of a support portion of a cutting blade support in the disassembly tool 100C.

FIG. 11 is a schematic cross-sectional view showing another configuration of a support portion of the cutting blade support in the disassembly tool 100C.

FIG. 12 is another disassembly tool 100 according to the embodiment of the present invention.
Schematic sectional view showing D.

13 (a) and 13 (b) are cross-sectional views of main parts for describing screw fastening.

14A and 14B are cross-sectional views of a main part for describing pin fastening.

15 (a), (b), (c), (d), (e),
(F) is an important section sectional view for explaining rivet fastening.

16 (a), (b), (c) and (d) are process diagrams showing a procedure for fastening a blind rivet to a base material.

FIG. 17 is an essential part cross-sectional view for explaining a tubular rivet.

FIG. 18 is a schematic cross-sectional view for explaining a conventional method for disassembling a fastening member.

FIG. 19 is a schematic cross-sectional view for explaining a problem in a conventional disassembling method of a fastening member.

FIG. 20 is a schematic sectional view showing a configuration of a disassembly tool 100A in which the present invention is implemented.

FIG. 21 is a schematic cross-sectional view showing a state where a flange portion of a fastening member is cut by the disassembly tool 100A.

FIG. 22 is a schematic cross-sectional view showing a state where a dish-shaped flange portion of a fastening member is cut by the disassembly tool 100A.

[Explanation of symbols]

1, 2 Base material 1a, 2a Base material fastening hole 10 Blind rivet (fastening member) 11a Blind rivet shaft hole 11b Blind rivet body 11c Blind rivet flange (head) 11d Blind rivet crimping portion 12 Blind rivet mandrel 100A Disassembly tool 100B Disassembly tool 100C Disassembly tool 100D Disassembly tool 102 Cutting blade of disassembly tool 103 Cutting edge of cutting blade 104 Cutting edge of cutting blade 105 End wall of cutting blade 105a Through hole in end wall of cutting blade 106 Cutting Blade regulating portion 200 Cutting blade support 201 End wall of cutting blade support 201a Through hole in end wall of cutting blade support 206 Engagement portion of cutting blade support 207 Supporting portion of cutting blade support 400 Cutting force applying means 410 Coil spring (cutting force urging means) 420 Cutting force Stacking means 421 Compression member (tension shaft) 421a Shaft portion of compression member 421b Engagement portion of compression member 421c Break portion of compression member (break portion) 421d Centering shaft of compression member (cutting blade positioning member, positioning portion) 422 Compression member Moving means 430 Breaking part (cutting force releasing means) 500 Contact member (holding part) 500a Base material contact surface of contact member 500b Flange contact surface of contact member 501 Contact portion of contact member 502 Screw A boundary Area d ₁ , d ₂ Inner diameter of fastening hole of base material d ₃ Outer diameter of cutting edge of cutting blade d ₄ Outer diameter of body of blind rivet

Claims (30)

[Claims] 1. A fastening member fastened to a base material by a body portion inserted into a fastening hole of the base material and a flange portion substantially integral with the body portion pressed into contact with a peripheral portion of the fastening hole. A disassembly tool of a fastening member for removing the member from the base material, a cutting blade for cutting the body and the flange along the body axis of the body and the flange of the fastening member, A cutting force for cutting the body and the flange of the fastening member,
Cutting force applying means for applying to the cutting blade, the cutting force applying means being capable of accumulating a cutting force applied to the cutting blade, and releasing the accumulated cutting force, whereby the fastening is performed. Cutting force urging means for urging the cutting blade toward the member with the cutting force; cutting force accumulating means for accumulating the cutting force applied to the cutting blade in the cutting force urging means; In a state where the cutting force accumulated in the cutting force urging means by the accumulating means reaches a value at which the cutting portion and the flange portion of the fastening member can be cut, the cutting force accumulated in the cutting force urging means is reduced. A disassembling tool for a fastening member, comprising a cutting force releasing means for releasing. 2. The disassembly tool for a fastening member according to claim 1, wherein said cutting force urging means has a property of accumulating a cutting force applied to said cutting blade by being compressed, and said cutting force accumulating means. The means has a compression member for compressing the cutting force urging means, and a compression member moving means for moving the compression member in a direction in which the cutting force urging means is compressed. In the process in which the compression member is moved by the compression member moving means and the cutting force is accumulated in the cutting force urging means, the compression member is broken by losing the cutting force accumulated in the cutting force urging means. A disassembly tool for a fastening member, comprising a broken portion formed in the member. 3. The disassembly tool for a fastening member according to claim 2,
The disassembly tool for a fastening member, wherein the cutting force urging means is formed of an elastic member. 4. The compression member disassembling tool according to claim 2, wherein the compression member of said cutting force accumulating means for compressing said cutting force urging means is said compression member moving means for moving said compression member. A disassembling tool for a fastening member, wherein the disassembling tool is configured to be detachable with respect to the cutting blade and is formed integrally with the cutting blade. 5. The disassembly tool for a fastening member according to claim 1, wherein said cutting blade has a cutting edge having a diameter smaller than an inner diameter of a fastening hole of said base material, and said fastening tool. A disassembly tool for a fastening member, comprising: a substantially cylindrical blade edge portion along a body axis direction of a body portion and a flange portion of a member. 6. A disassembly tool for a fastening member according to claim 1, 2, 3, 4, or 5, wherein said disassembling tool is fitted into a shaft hole formed in said fastening member substantially coaxial with a body of said fastening member. A cutting blade positioning member for positioning a cutting position of the cutting blade when cutting the fastening portion of the fastening member. 7. A disassembly tool for a fastening member according to claim 6, wherein said cutting blade positioning member is formed integrally with said compression member. 8. The method of claim 1, 2, 3, 4, 5, 6, or
7. The disassembly tool for a fastening member according to claim 7, further comprising a contact member that comes into contact with the base material when the fastening portion of the fastening member is cut by the cutting blade. 9. The disassembly tool for a fastening member according to claim 8, wherein said abutting member is provided on a cutting blade support member which supports said cutting blade so as to be able to advance and retreat along a central axis direction of a fastening hole of said base material. A disassembly tool for a fastening member, wherein the disassembly tool is used. 10. The disassembly tool for a fastening member according to claim 8 or 9, wherein a contact portion of said contact member abutting on said base material has a magnetic force attracted to said base material. A disassembly tool for a fastening member, characterized in that: 11. A body of a fastening member is inserted into a fastening hole of a base material, and a flange substantially integral with the body is pressed into contact with a peripheral edge of the fastening hole. The fastening shaft inserted into the shaft hole is pulled up by the fastening shaft holding portion, and the fastening shaft is broken at a predetermined breaking portion, and the fastening member is fastened to the base material by using a fastening tool for fastening the fastening member to the base material. A disassembling tool for a fastening member for removing the fastening member from the base material, the cutting blade cutting the body and the flange along the body axis of the body and the flange of the fastening member. Having a property that a cutting force for cutting the trunk portion and the flange portion of the fastening member by being compressed is accumulated, and by releasing the accumulated cutting force, the cutting force is directed toward the fastening member. Cutting force urging means for urging the cutting force to the cutting blade, and a fastening shaft of the fastening tool A shaft portion detachably mounted on the holding portion, wherein the cutting portion is biased by the shaft portion being pulled up by the fastening shaft grip portion in a state where the shaft portion is mounted on the fastening shaft grip portion. A compression member for compressing the means, and a cutting stored in the cutting force urging means when the shank of the compression member is pulled up by the fastening shaft gripper of the fastening tool and the cutting force urging means is compressed. When the force reaches a value at which the body and the flange of the fastening member can be cut, the cutting force urging means is broken by losing the cutting force accumulated in the cutting force urging means. A breaking portion formed in the compression member for releasing the cutting force accumulated in the fastening member. 12. A disassembly tool for a fastening member according to claim 11, wherein said cutting blade has a substantially cylindrical cutting edge along a body axis direction of a body and a flange of said fastening member; An end wall substantially orthogonal to the body axis direction in which a through hole through which the shaft portion is inserted is formed, wherein the shaft portion of the compression member is an end wall of the cutting blade In a state where the cutting tool is pulled up by the fastening shaft holding portion of the fastening tool while being inserted through the through hole formed in the cutting tool, the engaging portion engages with the cutting blade and pulls up the cutting blade. Disassembly tool for fastening members. 13. A disassembly tool for a fastening member according to claim 11 or 12, wherein a breaking portion of said compression member which is broken by losing a cutting force accumulated in said cutting force urging means, A disassembly tool for a fastening member, wherein the disassembly tool is formed on a shaft portion of the compression member detachably attached to the fastening shaft grip portion. 14. A disassembly tool for a fastening member according to claim 13, wherein a plurality of said break portions are formed at a predetermined interval on said shaft portion, and said cut portion is formed from a side near a fastening shaft grip portion of said fastening tool. A disassembling tool for a fastening member, wherein the disassembling tool is formed so as to be broken sequentially. 15. The disassembly tool for a fastening member according to claim 12, wherein the breaking portion of the compression member that is broken by losing the cutting force accumulated in the cutting force urging means is engaged with the engaging portion of the compression member. A disassembly tool for a fastening member, formed between the shaft and the shaft, wherein the engagement member is broken by being separated from the shaft in response to the cutting force. 16. The disassembly tool for a fastening member according to claim 11, 12, 13, 14, or 15, wherein the compression member is formed on the fastening member substantially coaxial with a body of the fastening member. A disassembly tool for a fastening member, comprising a fitting portion that fits into a hole. 17. The method of claim 11, 12, 13, 14, 15,
Alternatively, in the disassembly tool for a fastening member, the cutting blade is disposed on a cutting blade support that supports the cutting blade so as to be able to advance and retreat along a center axis direction of the fastening hole of the base material; By the cutting force accumulated in the cutting force urging means, the cutting edge of the cutting blade is formed on the cutting blade support at least in a state where the cutting edge substantially reaches the boundary surface between the flange portion of the fastening member and the base material. Locked by the locking part
A disassembling tool for a fastening member, comprising a restricting portion for restricting the movement of the cutting blade. 18. The disassembly tool for a fastening member according to claim 17, wherein said cutting blade support has a through hole through which a shaft portion of said compression member is inserted, and said compression blade inserted through said through hole. When the shaft portion of the member is pulled up by the fastening shaft gripping portion of the fastening tool, it has a bearing portion for supporting the tip portion of the fastening tool against the cutting force accumulated in the cutting force biasing means. Disassembly tool for fastening members. 19. A disassembly tool for a fastening member according to claim 18, wherein said support portion of said cutting blade support is formed in a shape into which a tip portion of said fastening tool is fitted. Disassembly tool. 20. The disassembly tool for a fastening member according to claim 17, 18 or 19, wherein the cutting blade support is configured to cut the fastening portion of the fastening member by the cutting blade with respect to the base material. A disassembly tool for a fastening member, characterized in that the disassembly tool has a contact portion that makes contact. 21. A body portion is inserted into a fastening hole formed in the base material, and a head integrated with the body portion is fastened to the base material by contacting a peripheral portion of the fastening hole,
A blind rivet having a cylindrical shape in which a boundary region between the body and the head has a cylindrical shape substantially parallel to the outer peripheral surface of the body and having a diameter equal to or smaller than the diameter of the fastening hole is fastened to the base material. An attachment structure that is connected to a blind rivet fastening device for disassembling the blind rivet fastened to the base material, wherein one is opened along the axial direction of the body and the other is provided with a bottom. A cylindrical body cover, having a cylindrical shape with one opened along the axial direction of the body and a bottom provided on the other, the outer diameter of which is less than the hole diameter of the fastening hole and the inner diameter of the body A cutting blade having an outer diameter or less; an elastic member provided between an inner surface of the bottom of the main body cover and an outer surface of the bottom of the main body cover; and a bottom of the main body cover and the main body cover. Penetrate the bottom,
Further, a pulling portion is provided in which a portion protruding outside the cylinder from the bottom of the body cover is gripped by the blind rivet fastening device, and an engaging portion is provided for engaging with a surface inside the cylinder at the bottom of the cutting blade. An attachment structure having a shaft. 22. The attachment structure according to claim 21, wherein the shaft portion is provided with a broken portion on a cutting blade side of a portion gripped by the blind rivet fastening device. 23. The attachment structure according to claim 22, wherein a plurality of said break locations are provided along an axial direction of said shaft portion, and each of said break locations has a breaking limit increasing toward said cutting blade. Attachment structure characterized by: 24. The attachment structure according to claim 21, wherein the main body cover contacts the head of the base material or the blind rivet to position and hold the main body cover with respect to the base material or the blind rivet. Attachment structure characterized in that a holding portion is provided. 25. The attachment structure according to claim 24, wherein the holding portion is attached to the main body cover by screwing, and a relative position between the main body cover and the holding portion can be adjusted along an axial direction of the body portion. An attachment structure, characterized in that: 26. The attachment structure according to claim 24, wherein a portion of the holding portion that contacts the base material or the head of the blind rivet has a magnetic force. 27. The attachment structure according to claim 21, wherein a locking portion is provided on the main body cover so as to be located on an outer periphery of the cutting blade, and a restricting portion that locks the locking portion on the cutting blade. Is provided, and the moving portion of the cutting blade, which is urged by the elastic member and moves in the direction away from the main body cover, is restricted by the locking portion being locked to the restricting portion, and the cutting is performed. An attachment structure wherein the blade is prevented from falling off from the main body cover. 28. The attachment structure according to claim 21, wherein the blind rivet has a shaft hole at the center of the head, and the pulling shaft has a shaft diameter equal to or smaller than the hole diameter of the shaft hole, and the cutting is performed. An attachment structure, wherein a positioning portion protruding from a tip in a cutting direction of the blade and being fitted into the shaft hole is formed. 29. The attachment structure according to claim 21, wherein the outer peripheral surface of the cutting edge of the cutting blade has an inclined surface that is gradually inclined toward the front end in the cutting direction. 30. A body portion is inserted into a fastening hole formed in a base material, and a head integrally formed with the body portion is fastened to the base material by contacting a peripheral portion of the fastening hole,
A fastening member having a cylindrical shape in which a boundary region between the trunk portion and the head portion is substantially parallel to the outer peripheral surface of the trunk portion and having a diameter equal to or less than the diameter of the fastening hole is disassembled from the base material. A method of disassembling a fastening member to be detached by pulling a cutting blade having a diameter substantially the same as that of the boundary region in a direction away from the fastening member by gripping a tension shaft substantially integrally formed with the cutting blade. The cutting blade accumulates a cutting force for cutting the fastening member, and releases the accumulated cutting force by breaking the tension shaft during the tensioning movement, thereby moving the cutting blade toward the fastening member. By cutting the boundary area by the cutting blade,
A method for disassembling a fastening member, comprising removing the fastening member from the base material.