JP2000176593A - Tool and method for disassembling tightening member, and production system using the disassembling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disassembly tool of a tightening member which is capable of completely detaching from a base material the tightening member tightened to the base material. SOLUTION: A disassembly tool is provided with a cutting blade 500 to cut a body part 11b and a surface side flange part 11c along a boundary area in the axial direction of the body part between the body part 11b of a blind rivet 10 and the surface side flange part 11c as a tightening member, the blind rivet 10 disassembled from the surface side flange part 11c and stayed on base materials 1, 2 is pressed by a blade tip 503 of the cutting blade 500 by cutting the surface side flange part 11e by the cutting blade 500, and the body part 11b and a back side flange part 11d of the blind rivet 10 are extruded from the base materials 1, 2. The blind rivet 10 tightened by the base materials 1, 2 can be completely disassembled.

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, a disassembly method, and a production system using the disassembly method, and more particularly, to a fastening part of a fastening member fastened to a base material by mechanical fastening. The present invention relates to a disassembly tool for a fastening member that disassembles and removes the fastening member from the base material, a disassembly method, and a production system using the disassembly method.

[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. 10A, or a tapping screw 5 as shown in FIG. 10B. 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. 11A, 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. 11 (b), when the shaft 7 is crimped to the base material 1, the pin is fastened, and the shaft 7 is regarded as a fastening member.

The rivet setting is performed by using a riveting machine or a riveting tool to form a solid rivet 8 as shown in FIG. 12 (a), a tubular rivet 9 as shown in FIG. 12 (b), and FIG. 12 (c). 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 is shown in FIG.
As shown in (c), the rivet body 11 is composed of a mandrel (core shaft) 12 inserted into a shaft hole 11a of the rivet body 11, for example, as shown in FIG.
The base materials 1 and 2 are fastened to the fastening holes 1a and 2a in the procedures shown in (b), (c) and (d).

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

Then, as shown in FIG. 13C, when the nose piece 13a of the riveting tool 13 is brought into close contact with the flange portion (head) 11c of the rivet body 11, the trigger of the riveting tool 13 is pulled. The mandrel 12 of the blind rivet 10 is gripped and pulled up by the jaw 13b of the riveting tool 13.

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. 12C, 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. 14, a fastening portion 1b integrally formed on one base material 1 is crimped 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 type of fastening member, for example, as shown in FIG. 15, 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. 16, 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 when cutting the fastening portion of the fastening member, as shown in FIG. 15, the flange of the fastening member is usually used. A method is employed 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, but 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 impossible to grip the flange portion 11c with the gripping tool 15 (see FIG. 20).
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. 10 (a) and 10 (b), bolts 3, nuts 4 and tapping screws 5 as fastening members can be relatively easily formed from the base materials 1, 2. Although there are many cases where the bolts, nuts 4, and tapping screws 5 can be removed, for example, the threaded portions of the bolts 3, nuts 4, and tapping screws 5 are rusted and fixed, or the threads are damaged, and the bolts 3, nuts 4, and tapping screws 5 are not removed. If the base material 1 or 2 runs idle, or if the engaging portion for a fastening tool (spanner or driver) is damaged, the bolt 3,
Removal of the nut 4 and the tapping screw 5 involves great difficulty.

The inventor of the present invention, for example, as shown in FIG. 17 or FIG.
a, a body portion 11b and a flange portion 11c of the blind rivet 10 serving as the fastening member having a cutting edge 103 having a smaller diameter than the inner diameters d ₁ and d ₂ and being substantially parallel to the inner peripheral surface of the fastening hole 1a. Cutting blade 102 having a substantially cylindrical cutting edge 104 along a boundary region between the cutting blade 102 and a fastening hole 1a of the base material 1.
A cutting blade support 200 that supports the cutting blade 102 so as to be able to move forward and backward along the center axis direction of the cutting blade 102, and the cutting blade 1 is attached to the flange portion 11c along the center axis direction of the fastening hole 1a of the base material 1.
The cutting force is applied to the cutting blade 102 to cut 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 cutting into the blade edge portion 104 of the blind rivet 10. Cutting force applying means 3
00 and a disassembly tool 100A, 100B having a disassembly tool 00 were developed.

This disassembly tool 100A or 100B
Blind rivet 1 fastened to base materials 1 and 2 using
In order to disassemble 0, for example, as shown in FIG. 17, first, the cutting edge 103 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 as the fastening member. . Next, in this state, the cutting blade 10
The cutting force in the cutting direction is urged against the cutting member 2.

As a result, as shown in FIG. 19, the cutting edge 104 of the cutting blade 102 of the disassembly tool 100A, 100B.
However, the blind rivet 10 cuts along the boundary region between the body portion 11b and the flange portion 11c, the fastening portion of the blind rivet 10 is cut, and the flange portion 11c is separated from the body portion 11b.

The detailed configuration of the disassembly tools 100A and 100B will be described later.

[0032]

However, in the disassembled tools 100A and 100B, as described above, the blind rivet 10 is cut by cutting the fastening portion of the blind rivet 10 as the fastening member to be cut. Although the flange portion 11c can be separated from the body portion 11b, the base materials 1 and 2 cannot be separated from the body portion 11b of the fastening member.

That is, the body 11b of the fastening member is
Normally, since the fixing members 1A and 2A are pressed against the fastening holes 1a and 2a of the base materials 1 and 2, the disassembling tools 100A and 100A as described above are used.
00B and the body 11b and the flange 1 of the fastening member.
1c does not completely separate the body 11b of the fastening member from the base materials 1 and 2.

Therefore, in order to completely separate the base materials 1 and 2 and the fastening member, the disassembling tool 1 described above is used.
After separating the body 11b and the flange 11c of the fastening member by 00A and 100B, it is necessary to forcibly remove the body 11b from the base materials 1 and 2.

The present invention has been made in view of the above problems, and has as its object to disassemble a fastening member capable of completely removing a fastening member fastened to a base material from the base material; An object of the present invention is to provide a decomposition method and a production system using the decomposition method.

[0036]

In order to achieve the above-mentioned object, a first aspect of the present invention provides a body inserted into a fastening hole of a base material, and a front side peripheral edge and a back side peripheral edge of the fastening hole. A disassembly tool of a fastening member for removing a fastening member fastened to the base material from the base material by the front side flange portion and the rear side flange portion substantially integral with the body portion pressed against the base material,
Cutting the body and the front flange along a boundary region in the body axial direction between the body and the front flange, and cutting the front flange by cutting the front flange; A cutting blade that presses the fastening member remaining on the side and pushes out the base material.

In this disassembly tool, first, along the body axial direction boundary region between the body portion of the fastening member and the front flange portion, the cutting blade is used to cut the body portion and the front flange portion of the fastening member. Is cut off, and the front flange portion is separated from the body portion.

Here, the boundary region in the body axial direction between the body and the front flange of the fastening member is, for example, as shown in FIG.
Blind rivet 1 as the fastening member shown in (f)
0 rivet body 11 body 11b and flange 11
c, which is a cylindrical region substantially parallel to the outer peripheral surface of the body 11b indicated by a broken line A in FIG.

Next, the fastening member separated from the front flange portion by the cutting blade and remaining in the fastening hole of the base material is pushed out of the base material by the cutting blade.

As a result, the fastening member fastened to the base material is removed from the base material, and the fastening member is completely disassembled.

According to a second aspect of the present invention, in the disassembling tool for the fastening member according to the first aspect, the cutting blade has a structure in which the front flange portion is cut by the cutting blade and the fastening member remains on the base material side. The fastening member is formed in a shape in which the fastening member is pushed out of the base material in contact with the rear side flange portion.

In this disassembly tool, first, along the boundary region in the body axial direction between the body of the fastening member and the front flange, the body of the fastening member and the front flange are used by the cutting blade. Is cut off, and the front flange portion is separated from the body portion.

Next, the cutting blade is separated from the front flange portion by the cutting blade and abuts on the rear flange portion of the fastening member remaining in the fastening hole of the base material.

Then, the fastening member is pushed out of the base material by the cutting blade in contact with the rear flange of the fastening member.

As a result, the fastening member fastened to the base material is removed from the base material, and the fastening member is completely disassembled.

According to a third aspect of the present invention, in the disassembling tool for the fastening member according to the second aspect, the cutting blade has an inner diameter equal to or larger than an outer diameter of a body portion of the fastening member, and a fastening hole of the base material. Characterized in that it is formed in a cylindrical shape having an outer diameter less than or equal to the inner diameter.

In this disassembly tool, the cutting blade is
Since the fastening member is formed in a cylindrical shape having an inner diameter equal to or larger than the outer diameter of the trunk portion of the body and having an outer diameter equal to or smaller than the inner diameter of the fastening hole of the base material, the fastening member is extruded from the base material. At this time, the base material is not damaged by the cutting blade abutting on the rear side flange portion of the fastening member.

According to a fourth aspect of the present invention, in the disassembling tool for the fastening member according to the first aspect, the cutting blade has a structure in which the front side flange portion is cut by the cutting blade and remains on the base material side. The fastening member is formed in such a shape that the fastening member is pushed out of the base material in contact with the body.

In this disassembly tool, first, the cutting blade is used to cut the body of the fastening member and the front flange portion along the boundary region in the body axis direction between the body portion and the front flange portion of the fastening member. Is cut off, and the front flange portion is separated from the body portion.

Then, the cutting blade is separated from the front flange portion by the cutting blade, and the cutting blade contacts the body of the fastening member remaining in the fastening hole of the base material.

Then, the fastening member is pushed out of the base material by the cutting blade in contact with the body of the fastening member.

Thus, the fastening member fastened to the base material is removed from the base material, and the fastening member is completely disassembled.

In this disassembly tool, the cutting blade is
Since the fastening member is pushed out of the base material by abutting on the body of the fastening member, the moving stroke of the cutting blade at the time of the pushing is smaller than that of the disassembly tools of the second and third aspects.

According to a fifth aspect of the present invention, in the disassembling tool for the fastening member according to the fourth aspect, the cutting blade is a cylindrical member extending along a boundary region in the body axial direction between the body and the front flange of the fastening member. The cutting edge portion has a shape like a circle, and the outer peripheral surface of the cutting edge portion is formed in a shape that is gradually inclined.

In this disassembly tool, since the outer peripheral surface of the cutting edge of the cutting blade is formed into a shape that is gradually inclined, the cutting surface of the front flange portion of the fastening member is shaped like a mortar by the cutting blade. The front side flange portion is less likely to bite into the cutting edge of the cutting blade. Thereby, when pushing out the fastening member from the base material by the cutting blade, it is possible to suppress the influence of the frictional force due to the bite of the cutting edge of the cutting blade and the front side flange portion,
The fastening member can be easily and smoothly extruded from the base material.

According to a sixth aspect of the present invention, in the disassembling tool for the fastening member according to the fifth aspect, the cutting blade has an inner diameter equal to or less than an outer diameter of a body portion of the fastening member, and a fastening hole of the base material. Characterized in that it is formed in a cylindrical shape having an outer diameter less than or equal to the inner diameter.

In this disassembly tool, the cutting blade is
Since the fastening member is formed in a cylindrical shape having an inner diameter equal to or less than the outer diameter of the trunk portion of the body and having an outer diameter equal to or less than the inner diameter of the fastening hole of the base material, the fastening member is extruded from the base material. At this time, the base material is not damaged by the cutting edge of the cutting blade abutting on the rear side flange portion of the fastening member.

According to a seventh aspect of the present invention, there is provided a body which is inserted into a fastening hole of a base material, and a surface which is substantially integral with the body which is pressed into contact with a front side peripheral edge and a rear side peripheral edge of the fastening hole. A method of disassembling a fastening member for removing a fastening member fastened to the base material from the base material by the side flange portion and the back side flange portion, wherein the body portion and the front side flange portion have a body axial direction. Along the boundary area, the trunk and the front side flange are cut by a cutting blade, and after the front side flange is cut by the cutting blade, the fastening member remaining on the base material side, It is characterized in that it is pressed by the cutting blade and extruded from the base material.

In this disassembling method, first, along the boundary region in the body axis direction between the body portion and the front side flange portion of the fastening member, the body of the fastening member and the front side flange portion are cut by the cutting blade. Is cut off, and the front flange portion is separated from the body portion.

Then, the fastening member separated from the front side flange portion by the cutting blade and remaining in the fastening hole of the base material is pushed out of the base material by the cutting blade, and the fastening member is removed from the base material. Decomposed completely from wood.

According to an eighth aspect of the present invention, in the method for disassembling the fastening member according to the seventh aspect, the outer diameter of the fastening member is not less than the inner diameter of the fastening hole of the base material, the inner diameter being greater than the outer diameter of the body. The body and the front flange portion are cut by a cutting blade formed in a cylindrical shape having a diameter, and after the front flange portion is cut by the cutting blade, the body stays on the base material side. The cutting blade is brought into contact with the rear side flange portion of the fastening member, and the fastening member is extruded from the base material.

In this disassembling method, first, along the boundary region in the body axis direction between the body portion and the front flange portion of the fastening member, the body of the fastening member and the front flange portion are cut by the cutting blade. Is cut off, and the front flange portion is separated from the body portion.

Next, the cutting blade is separated from the front flange portion by the cutting blade and abuts on the rear flange portion of the fastening member remaining in the fastening hole of the base material.

Then, the fastening member is pushed out of the base material by the cutting blade abutting on the rear side flange portion of the fastening member, and the fastening member is completely disassembled from the base material.

According to a ninth aspect of the present invention, in the method for disassembling the fastening member according to the seventh aspect, the outer diameter of the fastening member is smaller than the inner diameter of the fastening hole of the base material. The body and the front flange portion are cut by a cutting blade formed in a cylindrical shape having a diameter, and after the front flange portion is cut by the cutting blade, the body stays on the base material side. The cutting blade is brought into contact with the body of the fastening member, and the fastening member is extruded from the base material.

In this disassembly tool, first, the cutting blade is used by the cutting blade along the boundary region in the body axial direction between the body and the front flange of the fastening member. Is cut off, and the front flange portion is separated from the body portion.

Next, the cutting blade is separated from the front flange portion by the cutting blade, and the cutting blade comes into contact with the body of the fastening member remaining in the fastening hole of the base material.

The fastening member is pushed out of the base material by the cutting blade in contact with the body of the fastening member, and the fastening member is completely disassembled from the base material.

In this disassembly method, the cutting blade is
Since the fastening member is pushed out of the base material by contacting the body of the fastening member, the moving stroke of the cutting blade at the time of the pushing can be made smaller than the disassembling method of the eighth aspect.

According to a tenth aspect of the present invention, the base material is inserted into the fastening hole of the base material and the head is pressed against the peripheral edge of the fastening hole and is substantially integral with the body portion. A disassembling tool for a fastening member for removing a fastened fastening member from the base material, wherein the body portion is a cylindrical region having a diameter equal to or less than a diameter of the fastening hole and substantially parallel to an outer peripheral surface of the body portion. Cutting means for cutting a boundary region between the cutting means and the head, and cutting force urging means for applying a cutting force of the cutting means by an urging force, wherein the cutting means urges the cutting force. The device is characterized in that it enters the fastening hole by the urging force of the means, and cuts out the boundary region and pushes out the body separated from the head through the fastening hole.

In this disassembly tool, the cutting means for cutting the boundary region between the body and the head of the fastening member fastened to the base material enters the fastening hole of the base material by the urging force of the cutting force urging means. Since the torso separated from the head after cutting the boundary region is pushed out from the fastening hole, the torso remains in the fastening hole and the fastening member can be easily and completely disassembled.

According to an eleventh aspect of the present invention, in the disassembling tool for a fastening member according to the tenth aspect, the fastening member is pressed against a peripheral edge opposite to the peripheral edge on which the head is pressed against the peripheral edge. A bottom portion for holding the base material together with the head and holding the base material in a fastened state is provided, and the cutting means has an inner diameter equal to or larger than the outer diameter of the body and an outer diameter equal to or smaller than the hole diameter of the fastening hole. The cutting blade pushes the torso part separated from the head by passing through the fastening hole and pressing the bottom part after cutting the boundary region. It is characterized by the following.

In this disassembly tool, when the fastening member has a bottom portion for holding the base material together with the head and holding the base material in a fastening state, the cutting blade serving as the cutting means passes through the fastening hole after cutting the boundary region. By pushing the bottom, the body separated from the head is pushed out of the fastening hole integrally with the bottom, so that the body remains in the fastening hole and the fastening member can be easily and completely disassembled.

At this time, since the cutting blade is cylindrical and has an inner diameter equal to or larger than the outer diameter of the body portion and an outer diameter equal to or smaller than the hole diameter of the fastening hole, the cutting blade is formed after the cutting of the boundary region is completed and until it contacts the bottom. A force that hinders the movement hardly acts, and damage to the vicinity of the fastening hole of the base material due to cutting can be effectively prevented.

According to a twelfth aspect of the present invention, in the disassembly tool for a fastening member according to the tenth aspect, the cutting means has a cylindrical shape having an inner diameter less than the outer diameter of the body and an outer diameter less than the hole diameter of the fastening hole. The cutting blade is configured to cut out the boundary region, and then cut into the body separated from the head and further move in the cutting direction, thereby extruding the body from the fastening hole. It is a feature.

In this disassembly tool, since the cutting blade forming the cutting means cuts into the body and moves in the cutting direction after cutting the boundary region, the body separated from the head is pushed out from the fastening hole. Can be easily and completely disassembled without remaining in the fastening hole.

At this time, since the cutting blade is cylindrical and has an inner diameter smaller than the outer diameter of the body, the cutting blade cuts into the body near the cutting completion point in the boundary area, and the moving stroke is shortened.
Since the cutting blade has an outer diameter equal to or less than the diameter of the fastening hole, damage to the base material near the fastening hole due to cutting can be effectively prevented.

The thirteenth aspect of the present invention relates to the tenth, eleventh,
Alternatively, in the disassembly tool of the twelfth fastening member, the tip of the cutting means in the cutting direction is a blade edge that is inclined so as to be gradually tapered.

In this disassembly tool, the cutting means has a cutting edge which is inclined so that the tip in the cutting direction becomes gradually tapered. For example, the cutting means comprises a cylindrical cutting blade, and the outer peripheral surface of the cutting edge is inclined. In this case, the influence of the frictional force due to the bite between the cutting edge and the head can be suppressed when the cutting blade pushes out, and the body can be easily and smoothly pushed out from the fastening hole.

According to a fourteenth aspect of the present invention, the base member is inserted into the fastening hole of the base material, and the head portion is pressed against the peripheral edge of the fastening hole and is substantially integral with the body portion. A method of disassembling a fastening member for removing a fastened fastening member from the base material, wherein the body portion is a cylindrical region having a diameter equal to or less than a diameter of the fastening hole and substantially parallel to an outer peripheral surface of the body portion. Cutting a boundary region between the head and the head by a cutting unit, and moving the cutting unit further in a cutting direction after cutting the boundary region, thereby extruding the trunk separated from the head through the fastening hole. It is characterized by the following.

In this disassembling method, the boundary region between the body and the head of the fastening member fastened to the base material is cut by the cutting means, and the cutting means is further moved in the cutting direction to be separated from the head. Since the body is pushed out of the fastening hole, the fastening member can be easily and completely disassembled without the body remaining in the fastening hole.

According to a fifteenth aspect of the present invention, in the method for disassembling the fastening member according to the fourteenth aspect, the fastening member is pressed against a peripheral edge opposite to the peripheral edge on which the head is pressed against the peripheral edge. A bottom portion for holding the base material together with the head and holding the base material in a fastened state is provided, and the cutting means has an inner diameter equal to or larger than the outer diameter of the body and an outer diameter equal to or smaller than the hole diameter of the fastening hole. A cylindrical cutting blade having the body portion separated from the head by passing the cutting blade through the fastening hole after cutting the boundary region and pressing the bottom portion with the cutting blade. It is characterized by being extruded from.

In this disassembling method, when the fastening member has a bottom portion for holding the base material together with the head and holding the base material in a fastening state, the cutting blade serving as cutting means is passed through the fastening hole after cutting the boundary region. By pressing the bottom with the cutting blade, the body separated from the head is pushed out of the fastening hole integrally with the bottom, so that the body remains in the fastening hole and the fastening member can be easily completely disassembled without remaining. it can.

At this time, since the cutting blade is cylindrical and has an inner diameter equal to or larger than the outer diameter of the body portion and an outer diameter equal to or smaller than the hole diameter of the fastening hole, the cutting blade is in a state from completion of cutting of the boundary region until contact with the bottom. A force that hinders the movement hardly acts, and damage to the vicinity of the fastening hole of the base material due to cutting can be effectively prevented.

According to a sixteenth aspect of the present invention, in the disassembling method of the fastening member according to the fourteenth aspect, the cutting means has a cylinder having an inner diameter less than the outer diameter of the body and an outer diameter less than the diameter of the fastening hole. By cutting the cutting blade into the body separated from the head after cutting the boundary region and moving the body further in the cutting direction, thereby extruding the body from the fastening hole. It is a feature.

In this disassembly method, the cutting blade serving as the cutting means is cut into the body and moved in the cutting direction after cutting the boundary region, whereby the body separated from the head is pushed out from the fastening hole. The fastening member can be easily and completely disassembled without the body remaining in the fastening hole.

At this time, since the cutting blade is cylindrical and has an inner diameter smaller than the outer diameter of the body, the cutting blade cuts into the body near the cutting completion point in the boundary area, and the moving stroke is shortened.
Since the cutting blade has an outer diameter equal to or less than the diameter of the fastening hole, damage to the base material near the fastening hole due to cutting can be effectively prevented.

According to a seventeenth aspect of the present invention, the base material is inserted into the fastening hole of the base material and the head is pressed against the peripheral edge of the fastening hole and is substantially integral with the body portion. A production system for removing the fastened fastening member and recovering the base material, wherein the fastening member fastened to the base material is cut by a cutting unit from a boundary region between the trunk and the head, After separating the torso and the head from each other,
The body separated from the head is pushed out of the fastening hole by the cutting means, whereby the fastening member is removed from the base material and the base material is collected.

The invention according to claim 18 is the production system according to claim 17, wherein the fastening condition of the fastening member with respect to the base material is inspected, and when the fastening condition is determined to be defective based on the inspection, the fastening member is determined. Is cut from a boundary region between the trunk and the head, and is removed from the base material.

In these production systems, the base material after the fastening members have been removed can be easily recovered in the same manner as in the above disassembly method.

[0091]

Embodiments of the present invention will be described below.

The disassembling tool of the fastening member according to the present embodiment is not limited to any type of fastening member used for mechanical fastening such as pin fastening, rivet fastening, and burring swaging described above. Although it is possible to disassemble even a member, here, for convenience of explanation, FIG.
The blind rivet 10 as shown in FIG.

First, the aforementioned disassembly tools 100A, 100B
Will be described.

[0094] These disassembly tools 100A and 100B
As shown in FIGS. 17 and 18, the cutting edge 10 having a smaller diameter than the inner diameters d ₁ and d ₂ of the fastening holes 1 a and 2 a of the base materials 1 and 2.
3 and a body 11b of a blind rivet 10 as the fastening member substantially parallel to the inner peripheral surface of the fastening hole 1a.
Cutting blade 102 having a substantially cylindrical cutting edge 104 along a boundary region A between the cutting blade 102 and the flange portion (head) 11c;
A cutting blade support 200 for supporting the base member 2 so as to be able to advance and retreat, and the flange portion 1 along the central axis direction of the fastening hole 1a of the base material 1.
1c into the cutting edge portion 104 of the cutting blade 102,
The body 11b and the flange 1 of the blind rivet 10
Along the boundary area A with the blind rivet 10
Cutting force applying means 300 for applying a cutting force for cutting the fastening portion of the cutting blade 102 to the cutting blade 102.

The cutting force applying means 300 of the disassembly tool 100A shown in FIG. 17 is constituted by, for example, a hydraulic cylinder or an air cylinder. Oil or oil is passed through a pressure path 200a provided in the cutting blade support 200. When the air enters and exits, the cutting blade 102 moves forward and backward along the direction of arrow a.

Here, the oil or air supply means which is the driving source of the cutting force applying means 300 is the driving source of the jaw 13b of the riveting tool 13 for fastening the blind rivet 10 to the base materials 1 and 2. The oil or air supply means can be used as it is.

Further, the cutting blade support 200 may be formed in a shape having a grip portion such as a pistol type so that the operator can easily operate the disassembling tool 100A with one hand. desirable.

Using the disassembly tool 100A, the base materials 1, 2
To disassemble the blind rivet 10 fastened to
First, as shown in FIG.
03 is a blind rivet 10 as the fastening member.
To the boundary region A between the body 11b and the flange 11c.

Next, in this state, for example, the cutting force is applied to the cutting blade 102 in the cutting direction by the cutting force applying means 300.

As a result, as shown in FIG. 19, the cutting edge portion 104 of the cutting blade 102 of the disassembly tool 100A bites along the boundary region A between the body portion 11b of the blind rivet 10 and the flange portion 11c. The fastening portion of the blind rivet 10 is cut, and the flange portion 11c is separated from the body portion 11b.

On the other hand, the disassembly tool 100B shown in FIG.
A cutting force applying unit 300 is provided so that a cutting force can be applied to the cutting blade 102 without using an external drive source such as an oil or air supply unit.

That is, the cutting force applying means 300 of the disassembling tool 100B includes an extensible coil spring 303 as a cutting force urging means for urging the cutting blade 102 with a cutting force in the cutting direction, A stopper 304 serving as cutting blade locking means for locking the cutting blade 102 at a position where the urging force of the coil spring 303 in the cutting direction with respect to the cutting blade 102 is accumulated (a position where the coil spring 303 contracts); The cutting blade 1 by the stopper 304
And a release button 305 as a cutting blade locking release means for releasing the locking of the blade 02.

Using the disassembly tool 100B, the base materials 1, 2
To disassemble the blind rivet 10 fastened to
First, as in the case of the disassembly tool 100A, the cutting edge 103 of the cutting blade 102 faces the boundary area A between the body 11b and the flange 11c of the blind rivet 10,
In this state, the cutting blade support 200 of the disassembly tool 100B
Is pressed against the blind rivet 10.

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.

Then, the position of the cutting blade 102 pushed into the cutting blade support 200 is caused by the contraction of the coil spring 303, and the urging force of the cutting blade 102 in the cutting direction, that is, the position of the coil spring 303 When the position where the stretching force is sufficiently accumulated is reached, the cutting blade 102
The stopper 304 is provided on the outer periphery of the stopper so as to be able to move forward and backward.
Is pushed out and engaged by a resilient force of a spring 306 into a locking hole 200b formed in an inner peripheral portion of the cutting blade support 200, and the cutting blade 102 is It is locked to the cutting blade support 200.

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

Thus, similarly to the case shown in FIG. 17, the cutting edge portion 104 of the cutting blade 102 of the disassembly tool 100B is provided.
But cuts along the boundary area A between the body 11b and the flange 11c of the blind rivet 10, the fastening portion of the blind rivet 10 is cut, and the flange 11c is separated from the body 11b.

In this disassembling tool 100B, a cutting force can be applied to the cutting blade 102 without using an external drive source such as an oil or air supply means. It is suitable for performing disassembly work.

In the above disassembly tools 100A and 100B, as shown in FIG.
03 cuts the fastening portion of the blind rivet 10 by moving linearly substantially in parallel with the central axes of the fastening holes 1a and 2a of the base materials 1 and 2, as in the disassembly method using the conventional drill. In addition, when the blind rivet 10 is disassembled, the blind rivet 10 does not run idle, and the base materials 1 and 2 are not damaged by the idle rotation and the like.
2, the blind rivet 10 can be easily and quickly removed.

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

Therefore, the disassembly tools 100A, 100B
According to this, for example, as shown in FIG. 20, the shape of the flange portion 11c of the blind rivet 10 is formed in a dish shape, and the flange surface of the flange portion 11c bites into the base material 1 or the blind rivet 10 torso 11b
Of the blind rivet 10 or the body 11
Even if it is difficult to grip b with a gripping tool 15 such as a plier or a punch, the fastening portion of the blind rivet 10 is cut by the cutting blade 102 to separate the flange portion 11c from the body portion 11b. be able to.

However, the disassembly tool 1 having the above-described structure is used.
In 00A and 100B, as described above, the flange 11c is separated from the body 11b of the blind rivet 10 by cutting the fastening portion of the blind rivet 10 as the fastening member to be cut. However, the base materials 1 and 2 cannot be separated from the body 11b of the fastening member.

That is, the body 11b of the fastening member is
Normally, since the fixing members 1A and 2A are pressed against the fastening holes 1a and 2a of the base materials 1 and 2, the disassembling tools 100A and 100A as described above are used.
00B and the body 11b and the flange 1 of the fastening member.
1c does not completely separate the body 11b of the fastening member from the base materials 1 and 2.

Therefore, in order to completely separate the base materials 1 and 2 and the fastening member, the disassembling tool 1 described above is used.
After separating the body 11b and the flange 11c of the fastening member by 00A and 100B, it is necessary to forcibly remove the body 11b from the base materials 1 and 2.

FIG. 1 shows a disassembly tool 10 according to this embodiment.
An example of 0C is shown.

The disassembly tool 100C is arranged along the body axial direction boundary area A between the body 11b of the blind rivet 10 as the fastening member and the front flange (head) 11c. It has a cutting blade 500 for cutting the front side flange portion 11c.

Further, this disassembly tool 100C cuts the front side flange portion 11c by the cutting blade 500, thereby separating the blind rivet 10 separated from the front side flange portion 11c and remaining on the base materials 1 and 2 side. To
Pressed by the cutting edge 503 of the cutting blade 500, the body 11b of the blind rivet 10 and the rear flange (bottom).
11d is extruded from the base materials 1 and 2.

Further, the disassembling tool 100C is provided with a cutting force applying means 30 for applying a cutting force to the cutting blade 500.
0 is provided, and the cutting blade 500 can be provided with a cutting force without using another tool such as a hammer.

The disassembling tool 100C having the cutting force applying means 300 can apply a cutting force to the cutting blade 500 without using an external driving source such as an oil or air supply means. This is suitable for performing disassembly work in a place where there is no source.

Since the cutting force applying means 300 of the disassembly tool 100C has the same configuration and function as the cutting force applying means 300 of the disassembly tool 100B, a detailed description thereof will be omitted. In the illustrated example, the coil spring 303 is used as the cutting force urging means of the cutting force applying means 300.
For example, it may be an elastic body such as rubber, or hydraulic or pneumatic.

In order to disassemble the blind rivet 10 fastened to the base materials 1 and 2 using the disassembling tool 100C, similarly to the disassembling tool 100B shown in FIG. By applying a cutting force to the cutting blade 500, the body 11 of the blind rivet 10
The cutting blade 500 is moved toward the fastening portion of the blind rivet 10 along a boundary region A between the b and the front side flange portion 11c in the body axial direction.

Thus, first, as shown in FIG. 2A, the blind rivet 1 is
The front side flange portion 11c is separated from the body portion 11b of the blind rivet 10.

Thus, the blind rivet 10
When the front side flange portion 11c is separated from the body portion 11b of the base material 1, as shown in FIG.
The cutting edge 503 of the cutting blade 500 abuts on the rear flange portion 11d of the blind rivet 10 remaining at a and 2a.

Then, the cutting edge 503 of the cutting blade 500 is attached to the rear flange 11d of the blind rivet 10.
When the cutting blade 500 is further moved in a state in which the cutting blade 500 is in contact, as shown in FIG.
The blind rivet 10 is extruded from the base materials 1 and 2.

As a result, the blind rivet 10 fastened to the base materials 1 and 2 is removed from the base materials 1 and 2,
The blind rivet 10 is completely disassembled.

Here, as shown in FIG. 3, the cutting blade 500 has an inner diameter d ₄ equal to or more than the outer diameter d ₃ of the body 11b of the blind rivet 10, and fastening holes 1a, it is preferably formed into a cylindrical shape having an inner diameter d _1, d ₂ the outer diameter d ₅ of the following 2a.

That is, the cutting blade 50 formed as described above is used.
0, the base material 1,
When the blind rivet 10 is pushed out of the base material 2, the base materials 1 and 2 are not damaged by the cutting blade 500.

In the disassembly tool 100C shown in FIG. 1, the rear flange 11d of the blind rivet 10 is provided.
By bringing the cutting edge 503 of the cutting blade 500 into contact therewith, as shown in FIG.
0 is pushed out from the base materials 1 and 2. As shown in FIG. 4, the disassembling tool is provided on the body 11b of the blind rivet 10 with the cutting edge 503 of the cutting blade 500.
May be configured to push the blind rivet 10 out of the base materials 1 and 2 by bringing the base rivet 10 into contact.

That is, in this disassembly tool, when a cutting force is applied to the cutting blade 500 by the cutting force applying means 300, first, as shown in FIG. And front side flange 11
c, along the boundary area A in the body axial direction with the cutting blade 5
00 is moved toward the fastening portion of the blind rivet 10.

Thus, as shown in FIG. 4 (b), the fastening portion on the front side of the blind rivet 10 is cut by the cutting blade 500, and the body 11b of the blind rivet 10 is cut from the front side flange portion 11c. Are separated.

Then, the trunk 1 of the blind rivet 10
When the front side flange portion 11c is separated from the base material 1b, the fastening holes 1a and 2a of the base materials 1 and 2 are formed as shown in FIG.
The cutting edge 503 of the cutting blade 500 comes into contact with the body 11b of the blind rivet 10 remaining at the edge.

When the cutting blade 500 is further moved in a state where the cutting edge 503 of the cutting blade 500 is in contact with the body 11b of the blind rivet 10, FIG.
The blind rivet 10 is pushed out of the base materials 1 and 2 by the cutting blade 500 as shown in FIG.

Thus, the blind rivet 10 fastened to the base materials 1 and 2 is removed from the base materials 1 and 2,
The blind rivet 10 is completely disassembled.

In this disassembly tool, since the cutting blade 500 is brought into contact with the body 11b of the blind rivet 10 and the blind rivet 10 is pushed out from the base materials 1 and 2, the cutting blade 500 at the time of pushing is used. 500
Can be made smaller than the disassembling tool 100C shown in FIG.

Here, the cutting blade 500 shown in FIG.
As shown in the figure, the body 11 of the blind rivet 10
b has a cylindrical cutting edge 504 along the boundary region A in the body axial direction between the front side flange 11c and the front side flange 11c, and the outer peripheral surface of the cutting edge 504 is formed in a shape that is gradually inclined. Is desirable.

That is, the cutting edge 50 of the cutting blade 500
By forming the outer peripheral surface of 4 into a gradually inclined shape,
As shown in FIG. 5, the cutting surface of the front side flange portion 11c of the blind rivet 10 is cut by the cutting edge portion 504 of the cutting blade 500 into a shape that is inclined in a mortar shape. The front side flange portion 11c does not easily bite into the portion 504.

Thus, when the blind rivet 10 is pushed out of the base materials 1 and 2 by the cutting blade 500,
The cutting edge portion 504 of the cutting blade 500 and the front-side flange portion 1
The influence of the frictional force due to the bite with the base material 1c can be suppressed, and the blind rivet 10 can be easily and smoothly pushed out from the base materials 1 and 2.

As shown in FIG. 6, the cutting blade 500 shown in FIG.
Has an outer diameter d ₃ below the inner diameter d ₄ of, and, the base materials 1 and 2
It is preferred that the fastening hole 1a, is formed in a cylindrical shape having an inner diameter d _1, d ₂ the outer diameter d ₅ of the following 2a.

That is, the cutting blade 50 formed as described above.
0, the base material 1,
When extruding the blind rivet 10 from 2, the cutting blade 500 does not damage the base materials 1 and 2, and the cutting blade 500 can be reliably brought into contact with the body 11b of the blind rivet 10. it can.

FIG. 7 is a flow chart of a production line for disassembling the blind rivet 10 in which an operation error has occurred, that is, the state of fastening of the fastening member to the base material is inspected, and the fastening state is determined to be defective based on this inspection. A flow chart of a production system in which a fastening member is sometimes cut from a boundary region between a trunk portion and a flange portion (head), removed from a base material, and recovered from the base material is shown. S. 1 (rivet fastening process) At least two base materials (workpieces) 1 and 2 are fastened by a blind rivet 10 using a commercially available riveting tool. S. 2 (fastening condition inspection process) In the rivet setting step 1, for example, whether a gap is generated between the set blind rivet 10 and the work (base materials 1, 2) (whether the work is loose), the blind rivet 10 is Inspect whether it is oblique to the surface of the fastening hole. This fastening condition inspection step may be performed simultaneously with the rivet fastening step (S.1). S. 3 (rivet disassembly process) fastening condition inspection process (S.
When the rivet fastening defect is found in 2), the blind rivet 10 is removed from the work using, for example, a disassembling apparatus 600 having a disassembly tool 100D described later. This rivet disassembling step (S.3) may be performed simultaneously with the fastening condition inspection step (S.2). When the fastening condition inspection step (S.2) is performed simultaneously with the rivet fastening step (S.1), the rivet disassembling step (S.3) may be performed simultaneously with the rivet fastening step (S.1). Good. S. 4 (Work inspection process) Rivet disassembly process (S.3)
If the disassembled work can be reused, the process again proceeds to the rivet fastening step (S.1), and the two works are fastened by rivets.

If the work disassembled in the rivet disassembling step (S.3) cannot be reused, the work is discarded.

That is, when the fastening holes 1a, 2a are bent, damaged, or deformed by the disassembling operation of the rivet disassembling step (S.3), or when the work itself is deformed, Dispose of the work. S. 5 (Unit assembling process) In the fastening condition inspection process (S.2), the work determined to be good
It is sent to the unit assembly process of the production line. The number of steps is, for example, n (n is an integer). S. 6 (Unit inspection step) The unit is sent to the unit inspection step. The number of steps is, for example, m (m is an integer)
It is. In this unit inspection process, the assembling goodness, performance inspection, and the like are performed. When the inspection is satisfied in all the unit inspection processes, the unit is shipped.

In this production line, each worker may carry out each process manually or automatically by a robot on an automation line.

The production line for the rivet disassembling operation for recycling after product recovery may be configured as described below.

When the product is collected from the user, the work (base materials 1 and 2) in the rivet fastening state is disassembled by the disassembly tool. When the disassembled work can be reused,
Reuse the work. When the disassembled work cannot be reused, the work is discarded. When a work made of metal and a work made of resin are mixed, the workability is improved if the work is sorted out and reused.

As the automatic rivet disassembling apparatus 600 used in this production line, for example, the one shown in FIG. 8 is used. In FIG. 8, reference numeral 601 indicates a double-armed robot device. This double-arm robot device 601 has a pair of arm mechanisms. Each arm mechanism includes a first arm 602, a second arm 603, a third arm 6
04. The first arm 602 includes a base 605 that is moved by a belt driving unit, and a guide rail 606 that engages with a guide 605a formed on the base 605 to guide the base 605. A second arm 603 is mounted and connected to the base 605, and the second arm 603 is
Are moved in the direction of the coordinate axis X1 among the predetermined three coordinate axes X1, Y1, Z1 which intersect each other.

Reference numeral 607 denotes a driven pulley of the belt driving unit, and reference numeral 608 denotes a driving pulley (not shown).
And a belt wound around the driven pulley 607 and having an end fixed to the base. The drive pulley is driven by a motor, and the belt 608 is run by the rotation of the drive pulley. At the same time, the base 605 is guided by the guide rail 606 to move the second arm 603 in the direction of the coordinate axis X1 with high accuracy.

Further, the second arm 603 is connected to the first arm 6
02, a frame 609 fixed on a base 605,
The guide rod 610 is inserted into a slit 609 a formed in the frame 609 and the movable base 611 to which the base end 604 a of the third arm 604 is fixed, and a screw (not shown) screwed to the movable base 611 is rotated. And a motor 612 for moving the moving base 611. The second arm 603 moves the third arm 604 together with the moving base 611 in the direction of the coordinate axis Z1 by the rotation of the motor 612.

The male screw of the moving base 611 into which the screw rotationally driven by the motor 612 is screwed is constituted by a ball screw containing a large number of balls for smooth movement of the moving base 611 and high accuracy. I have. Further, the guide rod 610 is provided to prevent the rotation of the moving base 611. The third arm 604 is fixed to the moving base 611 of the second arm 603,
03, a first arm member 613 having a base end 604a at one end, and a distal end 6 facing the base end 604a.
04b at one end, the other end of the second arm member 614 connected to the other end of the first arm member 613, and the second arm member 614 is connected to the first arm member 61.
3 and a joint 615 that rotates with respect to the third joint 3.
Then, the third arm 604 causes the joint 615 to move the distal end 604b in the direction of the coordinate axis Y1 among the predetermined three coordinate axes X1, Y1, and Z1. Note that, for example, a hand portion 616 that grips the disassembly tool 100D is provided at the distal end portion 604b of the third arm 604.

The double-armed robot apparatus 601 is automatically controlled by a computer, and when a failure in fastening the base materials 1 and 2 occurs in the production line, the fastening members are automatically disassembled in accordance with the flowchart shown in FIG.

The disassembly tool 100D is, as shown in FIG.
It is a pistol type provided with a handle 700, and has the same configuration as the disassembly tool 100C including the cutting blade 500 and the like at the tip. However, in FIG.
Since the zero cutting operation is performed automatically, the nose part 701 is not provided with the release button 305.

[0153]

According to the first to sixth aspects of the present invention, first,
The fastening portion of the fastening member is cut by a cutting blade along a boundary region in the body portion axial direction between the body portion and the front side flange portion of the fastening member, whereby the front side flange portion is separated from the body portion. Then, the fastening member separated from the front side flange portion by the cutting blade and remaining in the fastening hole of the base material is pushed out of the base material by the cutting blade, and is fastened to the base material. There is an excellent effect that the assembled fastening member can be completely disassembled and removed from the base material.

In particular, according to the second aspect of the present invention, the fastening member separated from the front flange portion by the cutting blade and remaining in the fastening hole of the base material is connected to the rear flange portion of the fastening member. There is an excellent effect that the fastening member, which is pushed out of the base material by the cutting blade in contact with the base material and is fastened to the base material, can be completely disassembled and removed from the base material.

According to the third aspect of the present invention, the cutting blade has an inner diameter equal to or larger than the outer diameter of the body of the fastening member and has an outer diameter equal to or smaller than the inner diameter of the fastening hole of the base material. Since the fastening member is formed into a cylindrical shape, when the fastening member is extruded from the base material, an excellent effect that the base material is not damaged by the cutting blade in contact with the rear flange portion of the fastening member is obtained. is there.

According to the fourth aspect of the present invention, the cutting blade pushes out the fastening member from the base material by abutting on the body of the fastening member. There is an excellent effect that the moving stroke can be reduced.

According to the fifth aspect of the present invention, since the outer peripheral surface of the cutting edge of the cutting blade is formed so as to be gradually inclined, the cut surface of the front flange portion of the fastening member is
It is cut into a shape that is inclined in a mortar by the cutting blade,
The front side flange portion is less likely to bite into the cutting edge of the cutting blade. Thereby, when the fastening member is pushed out of the base material by the cutting blade, the influence of the frictional force due to the bite between the cutting edge of the cutting blade and the front side flange portion can be suppressed. Has an excellent effect that can be easily and smoothly extruded.

According to the invention of claim 6, the cutting blade has an inner diameter less than or equal to the outer diameter of the body of the fastening member and an outer diameter less than or equal to the inner diameter of the fastening hole of the base material. When the fastening member is extruded from the base material, the base material is not damaged by the cutting edge of the cutting blade that is in contact with the body of the fastening member, and the body is formed. There is an excellent effect that the cutting blade can be reliably brought into contact with the portion.

According to the seventh aspect of the present invention, the cutting blade causes the body and the surface of the fastening member to extend along the boundary region in the body axis direction between the body and the front flange of the fastening member. After cutting the side flange portion and separating the front side flange portion from the body portion, the fastening member separated from the front side flange portion by the cutting blade and remaining in the fastening hole of the base material is removed. There is an excellent effect that the fastening member can be completely disassembled from the base material by being pushed out of the base material by the cutting blade.

According to the eighth aspect of the present invention, the cutting blade is used to cut the body and the surface of the fastening member along the boundary region in the body axis direction between the body and the front flange of the fastening member. After cutting the side flange portion and separating the front side flange portion from the body portion, the cutting blade is brought into contact with the rear side flange portion of the fastening member remaining in the fastening hole of the base material. There is an excellent effect that the fastening member can be pushed out of the base material by the cutting blade in contact with the back side flange portion of the fastening member, and the fastening member can be completely disassembled from the base material.

According to the ninth aspect of the present invention, the cutting blade is used to cut the body and the surface of the fastening member along the boundary region in the body axial direction between the body and the front flange of the fastening member. After cutting the side flange portion and separating the front side flange portion from the body portion, the cutting blade is brought into contact with the body portion of the fastening member remaining in the fastening hole of the base material. Since the fastening member is pushed out of the base material by the cutting blade abutting on the body portion, there is an excellent effect that the moving stroke of the cutting blade at the time of this pushing can be reduced.

According to the tenth to thirteenth aspects of the present invention, the cutting means for cutting the boundary region between the trunk and the head of the fastening member fastened to the base material is formed by the urging force of the cutting force urging means. And the torso separated from the head after the cutting of the boundary region is pushed out of the fastening hole, so that there is an excellent effect that the fastening member can be easily and completely disassembled without leaving the torso remaining in the fastening hole. .

In particular, according to the eleventh aspect of the present invention, when the fastening member has a bottom portion for holding the base material together with the head and holding the base material in a fastening state, the cutting blade serving as the cutting means is provided after the cutting of the boundary region. By pushing the bottom part through the fastening hole, the torso separated from the head is pushed out of the fastening hole integrally with the bottom part, so that the torso remains in the fastening hole and the fastening member can be easily and completely disassembled There is an excellent effect that can be.

At this time, since the cutting blade is cylindrical and has an inner diameter equal to or larger than the outer diameter of the body portion and an outer diameter equal to or smaller than the hole diameter of the fastening hole, it is necessary to cut the boundary region from completion to contact with the bottom. A force that hinders the movement hardly acts, and damage to the vicinity of the fastening hole of the base material due to cutting can be effectively prevented.

According to the twelfth aspect of the present invention, the cutting blade serving as the cutting means cuts into the body and moves in the cutting direction after cutting the boundary region, so that the body separated from the head is removed from the fastening hole. Since it is extruded, there is an excellent effect that the fastening member can be easily and completely disassembled without the body remaining in the fastening hole.

At this time, since the cutting blade is cylindrical and has an inner diameter equal to or less than the outer diameter of the body, the cutting blade cuts into the body near the cutting completion point in the boundary area, and the moving stroke is shortened.
Since the cutting blade has an outer diameter equal to or less than the diameter of the fastening hole, damage to the base material near the fastening hole due to cutting can be effectively prevented.

According to the thirteenth aspect of the present invention, the tip of the cutting means in the cutting direction is a tapered edge which is inclined so as to be gradually tapered, so that, for example, the cutting means comprises a cylindrical cutting blade. When the outer peripheral surface is inclined, the influence of the frictional force due to the bite between the cutting edge and the head can be suppressed during extrusion by the cutting blade, and the body can be easily and smoothly pushed out from the fastening hole. There is an excellent effect that can be.

According to the fourteenth to sixteenth aspects, the boundary region between the trunk and the head of the fastening member fastened to the base material is cut by the cutting means, and the cutting means is further moved in the cutting direction. Since the body separated from the head is pushed out from the fastening hole, there is an excellent effect that the fastening member can be easily and completely disassembled without the body remaining in the fastening hole.

In particular, according to the fifteenth aspect of the present invention, when the fastening member has a bottom portion for holding the base material together with the head and holding the base material in a fastened state, the cutting blade serving as cutting means is cut after cutting the boundary region. By passing through the fastening hole and pushing the bottom with this cutting blade, the torso separated from the head is pushed out of the fastening hole integrally with the bottom, so that the torso remains in the fastening hole and the fastening member can be easily completed completely. There is an excellent effect that it can be decomposed into.

At this time, since the cutting blade is cylindrical and has an inner diameter equal to or larger than the outer diameter of the body portion and an outer diameter equal to or smaller than the hole diameter of the fastening hole, it is necessary to cut the boundary region from completion to contact with the bottom portion. A force that hinders the movement hardly acts, and damage to the vicinity of the fastening hole of the base material due to cutting can be effectively prevented.

Further, according to the sixteenth aspect of the present invention, the cutting blade forming the cutting means is cut into the torso and moved in the cutting direction after cutting the boundary area, thereby fastening the torso separated from the head. Since it is extruded from the hole, there is an excellent effect that the fastening member can be easily and completely disassembled without the body remaining in the fastening hole.

At this time, since the cutting blade is cylindrical and has an inner diameter smaller than the outer diameter of the body, the cutting blade cuts into the body near the cutting completion point in the boundary area, and the moving stroke is shortened.
Since the cutting blade has an outer diameter equal to or less than the diameter of the fastening hole, damage to the base material near the fastening hole due to cutting can be effectively prevented.

According to the seventeenth and eighteenth aspects of the invention, there is an excellent effect that the base material after the fastening member has been removed can be easily recovered in the same manner as in the above disassembly method.

[Brief description of the drawings]

FIG. 1 is a disassembly tool 1 for a fastening member according to an embodiment of the present invention.
The schematic sectional drawing for demonstrating the structure of 00C.

FIGS. 2 (a), (b) and (c) show the disassembly tool 10;
The schematic sectional drawing which shows the process of disassembling the fastening part of a blind rivet using 0C.

FIG. 3 is a schematic sectional view showing dimensions of a cutting blade of the disassembly tool 100C.

FIGS. 4A, 4B, and 4C are schematic cross-sectional views showing a process of disassembling a fastening portion of the blind rivet using a cutting blade having another shape.

5 is an enlarged sectional view of an essential part for explaining a state in which the front side flange portion of the blind rivet is cut by the cutting blade shown in FIG. 4;

FIG. 6 is a schematic sectional view showing dimensions of the cutting blade shown in FIG. 4;

FIG. 7 is a flowchart for explaining a production system for collecting a base material by removing a fastening member from the base material.

FIG. 8 is a perspective view for explaining a schematic configuration of an automatic rivet disassembling apparatus 600.

FIG. 9 shows a disassembling tool 100 of the automatic rivet disassembling apparatus 600.
The perspective view which expands and shows D.

FIGS. 10A and 10B are main-portion cross-sectional views for explaining screw fastening;

FIGS. 11A and 11B are cross-sectional views of main parts for describing pin fastening.

FIGS. 12 (a), (b), (c), (d), (e),
(F) is an important section sectional view for explaining rivet fastening.

FIGS. 13 (a), (b), (c), and (d) are process diagrams showing a procedure for fastening a blind rivet to a base material.

FIG. 14 is an essential part cross-sectional view for explaining a tubular rivet.

FIG. 15 is a schematic cross-sectional view for explaining a conventional method of disassembling a fastening member.

FIG. 16 is a schematic cross-sectional view for explaining a problem in a conventional method for disassembling a fastening member.

FIG. 17 is a schematic sectional view showing a configuration of a disassembly tool 100A in which the present invention is implemented.

FIG. 18 is a schematic sectional view showing the configuration of another disassembly tool 100B in which the present invention is implemented.

FIG. 19 shows the disassembly tool 100A (or 100B).
FIG. 4 is a schematic cross-sectional view showing a state in which a flange portion of a fastening member is cut by the method.

FIG. 20 shows the disassembly tool 100A (or 100B).
The schematic sectional drawing which shows the state which cut the dish-shaped flange part of the fastening member by the.

[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 portion 11c Blind rivet surface side flange portion (head) 11d Back side of blind rivet Flange (bottom) 12 Mandrel of blind rivet 100A Disassembly tool 100B Disassembly tool 100C Disassembly tool 100D Disassembly tool 200 Cutting blade support 300 Cutting force applying means 303 Coil spring 500 Cutting blade 503 Cutting blade tip 504 Cutting blade tip A Boundary area d ₁ Inner diameter of fastening hole of base material 1 d ₂ Inner diameter of fastening hole of base material 2 d ₃ Outer diameter of body of blind rivet d ₄ Inner diameter of cutting blade d ₅ Outer diameter of cutting blade

Claims (18)

[Claims] 1. A body portion inserted into a fastening hole of a base material, and a front side flange portion and a back surface substantially integral with the body portion pressed into contact with a front side peripheral portion and a rear side peripheral portion of the fastening hole. A disassembly tool for a fastening member that removes a fastening member fastened to the base material from the base material by the side flange portion, along a boundary region of the body portion and the front side flange portion in the body portion axial direction. Having a cutting blade for cutting the body and the front side flange, and pressing the fastening member having the front side flange cut and remaining on the base material side and extruding the same from the base material. A disassembly tool for a fastening member. 2. The disassembly tool for a fastening member according to claim 1, wherein the cutting blade has a front-side flange portion cut by the cutting blade and a rear-side flange portion of the fastening member remaining on the base material side. A disassembly tool for a fastening member, wherein the disassembling tool is formed in a shape in which the fastening member is pushed out of the base material in abutment. 3. The disassembly tool for a fastening member according to claim 2, wherein the cutting blade has an inner diameter equal to or larger than an outer diameter of a body portion of the fastening member and an outer diameter equal to or smaller than an inner diameter of a fastening hole of the base material. A disassembly tool for a fastening member, which is formed in a cylindrical shape having a diameter. 4. The disassembly tool for a fastening member according to claim 1, wherein the cutting blade abuts on a body portion of the fastening member, the front side flange portion of which is cut by the cutting blade and stays on the base material side. Wherein the fastening member is formed in a shape extruding the fastening member from the base material. 5. The disassembly tool for a fastening member according to claim 4, wherein the cutting blade has a cylindrical cutting edge portion along a boundary region in a body axial direction between a body portion and a front side flange portion of the fastening member. A disassembling tool for a fastening member, wherein the cutting edge portion has an outer peripheral surface formed in a shape that is gradually inclined. 6. The disassembly tool for a fastening member according to claim 5, wherein said cutting blade has an inner diameter equal to or less than an outer diameter of a body portion of said fastening member and an outer diameter equal to or less than an inner diameter of a fastening hole of said base material. A disassembly tool for a fastening member, which is formed in a cylindrical shape having a diameter. 7. A body portion inserted into a fastening hole of a base material, and a front side flange portion and a back surface substantially integral with the body portion pressed into contact with a front side peripheral portion and a rear side peripheral portion of the fastening hole. A method for disassembling a fastening member, which removes a fastening member fastened to the base material from the base material by the side flange portion, wherein the body and the front side flange portion are arranged along a boundary region in the body axial direction. Cutting the body and the front flange with a cutting blade, and cutting the front flange with the cutting blade;
A method for disassembling a fastening member, wherein the fastening member retained on the base material side is pressed by the cutting blade and extruded from the base material. 8. A method of disassembling a fastening member according to claim 7, wherein said fastening member has an inner diameter equal to or greater than an outer diameter of a body portion thereof and an outer diameter equal to or less than an inner diameter of a fastening hole of said base material. After the body and the front flange are cut by the cutting blade formed in the above, after the front flange is cut by the cutting blade,
On the back side flange portion of the fastening member remaining on the base material side,
A method for disassembling a fastening member, comprising: abutting the cutting blade to push the fastening member from the base material. 9. A method of disassembling a fastening member according to claim 7, wherein said fastening member has an inner diameter smaller than an outer diameter of a body portion thereof and an outer diameter smaller than an inner diameter of a fastening hole of said base material. After the body portion and the front side flange portion are cut by the cutting blade formed in the above, after the front side flange portion is cut by the cutting blade,
A method for disassembling a fastening member, comprising: bringing the cutting blade into contact with a body portion of the fastening member remaining on the base material side, and extruding the fastening member from the base material. 10. A fastening member fastened to said base material by a body portion inserted into the fastening hole of the base material and a head portion pressed into contact with a peripheral portion of said fastening hole and substantially integral with said body portion. A disassembly tool of a fastening member for removing a member from the base material, wherein the torso and the head have a diameter equal to or less than a diameter of the fastening hole and are cylindrical regions substantially parallel to an outer peripheral surface of the torso. Cutting means for cutting the boundary area of the cutting means, and cutting force urging means for applying the cutting force of the cutting means by an urging force, the cutting means by the urging force of the cutting force urging means A disassembly tool for a fastening member, wherein the tool is inserted into the fastening hole, cuts the boundary region, and extrudes a body separated from the head from the fastening hole. 11. A disassembly tool for a fastening member according to claim 10, wherein said fastening member is pressed against a peripheral portion on the opposite side of the front and back sides of said peripheral portion on which said head is pressed and said mother portion together with said head. A bottom portion for holding the material and holding the base material in a fastened state, wherein the cutting means has a cylindrical shape having an inner diameter equal to or greater than the outer diameter of the body portion and an outer diameter equal to or less than the hole diameter of the fastening hole; The cutting blade pushes the torso separated from the head by pushing the bottom part after passing through the fastening hole after cutting the boundary area, thereby cutting out the torso part from the fastening hole. Disassembly tool for fastening members. 12. A disassembly tool for a fastening member according to claim 10, wherein said cutting means comprises a cylindrical cutting blade having an inner diameter equal to or less than an outer diameter of said body and an outer diameter equal to or less than a hole diameter of said fastening hole. A fastening member characterized in that the cutting blade pushes the torso out of the fastening hole by cutting into the torso separated from the head after further cutting the boundary region and further moving in the cutting direction. Disassembly tool. 13. The disassembly tool for a fastening member according to claim 10, 11 or 12, wherein a tip in a cutting direction of said cutting means is a blade tip portion which is inclined so as to be gradually tapered. Disassembly tool for parts. 14. A fastening member fastened to the base material by a body portion inserted into the fastening hole of the base material and a head portion pressed into contact with a peripheral portion of the fastening hole and substantially integral with the body portion. A method of disassembling a fastening member for removing a member from the base material, wherein the body and the head have a diameter equal to or less than a diameter of the fastening hole and are cylindrical regions substantially parallel to an outer peripheral surface of the body. Cutting the boundary area by cutting means, and further moving the cutting means in the cutting direction after cutting the boundary area, thereby extruding the body separated from the head from the fastening hole. How to disassemble members. 15. The fastening member disassembly method according to claim 14, wherein the fastening member is pressed against a peripheral portion on the opposite side of the front and back sides of the peripheral portion where the head is pressed against the mother member together with the head. A bottom portion for holding the material and holding the base material in a fastened state, wherein the cutting means has a cylindrical shape having an inner diameter equal to or greater than the outer diameter of the body portion and an outer diameter equal to or less than the hole diameter of the fastening hole; The cutting part is pushed through the fastening hole after cutting the boundary area, and the bottom part is pushed by the cutting blade, thereby pushing out the trunk part separated from the head from the fastening hole. Disassembly method of the fastening member. 16. The method for disassembling a fastening member according to claim 14, wherein said cutting means comprises a cylindrical cutting blade having an inner diameter equal to or less than an outer diameter of said body and an outer diameter equal to or less than a hole diameter of said fastening hole. A fastening member wherein the cutting blade is pushed out of the fastening hole by cutting the cutting blade into the body separated from the head after cutting the boundary region and moving the body further in the cutting direction. Decomposition method. 17. A fastening member fastened to the base material by a body portion inserted into the fastening hole of the base material and a head portion pressed against a peripheral portion of the fastening hole and substantially integrated with the body portion. A production system for removing a member and recovering the base material, wherein a cutting member fastened to the base material is cut by a cutting unit from a boundary region between the body and the head, and the body and the body are cut off. After the head and the head are separated from each other, the torso separated from the head is pushed out from the fastening hole by the cutting means, thereby removing the fastening member from the base material and collecting the base material. Characteristic production system. 18. The production system according to claim 17, wherein a state of fastening of the fastening member to the base material is inspected, and when the fastening state is determined to be defective based on the inspection, the fastening member is connected to the body. A production system, wherein the production system is cut from a boundary region with the head and removed from the base material.