JP2003247512A - Joining holding part - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the flexibility of the shape and the reliability when used in a joining holding part in which a function to make dismantling to be executed efficiently when products are disposed by utilizing a shape memory effect is added to the function to fasten a plurality of parts or members. <P>SOLUTION: The cylindrical joining holding part in which slits are provided over the whole length is constituted of a shape memory material to which a shape memory process is applied so that slit parts are bent on the inner periphery side so as to contract the outer diameter when the joining holding part is heated at a shape recovering temperature or more. A screw may be provided on the outer periphery in order to improve a fastening function to the joining holding part, and by using this, sorting and recovering for every quality of material or part can be executed efficiently and the recycling property of waste products is improved. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a member and a holding member used for fastening members, and particularly has a function of easily releasing the fastening of members when the product is discarded.
The present invention relates to a joint holding component that facilitates disassembly of products.

[0002]

2. Description of the Related Art Industrial products that are currently produced in large quantities,
For example, electric appliances are configured by combining many members and parts, and screws are often used for mutual connection of the members and parts in addition to welding and bonding. Also, the step of mechanically fastening parts with screws is mechanized like other methods, which contributes to improvement in productivity.

[0003] On the other hand, in recent years, from the viewpoints of environmental load caused by waste treatment and effective use of resources, recycling of parts and materials used in industrial products has been attracting attention. However, for recycling, it is indispensable to separate and collect members and parts by material, such as separating into metal and plastic. However, since the specifications of waste are not uniform, dismantling and recovery are automated. The current situation is that recycled materials are not fully utilized due to the difficulty and cost.

As one of the solutions, it is necessary to securely fasten and fix members and parts while the product is in use, and to develop screws and other fastening parts that can be easily disassembled and disassembled at the time of disposal. It is being advanced. Among them, a screw utilizing the shape recovery function of a shape memory alloy is disclosed in Japanese Patent Application Laid-Open No. 2002-5124, which is particularly noted for its practicality.

10A and 10B are views showing a coupling and holding component using the technique disclosed in the above publication, FIG. 10A being a side view and FIG. 10B being a front view. Further, FIG. 11 is a view showing a state in which the joint holding component of FIG. 10 has its diameter contracted due to the shape memory effect, and FIG. 11 (a) is a side view and FIG.
(B) is a front view.

As shown in FIG. 10, this joint holding component 1000 has a cylindrical shape having a slit 1001 provided over the entire length, and a nut of a screw portion 1002 is screwed into the non-screw portion 1003 so as to have a shape memory. A ring-shaped member made of a material, the diameter of which expands at a transformation temperature or higher, is fitted and used. When the product is disassembled, the slit 1001 is heated by heating to the transformation temperature or higher.
By contracting the circumference by an amount corresponding to the width, loosening is caused to facilitate separation of members and parts.

For this reason, the screw disclosed in the above publication has a contraction amount in the circumference or diameter due to its structural characteristics.
It is inevitably limited, which in turn limits the overall shape. Further, since it has a cylindrical shape with slits, when excessive load is applied, crush deformation of the slit, which cannot be seen in the cylindrical shape, may occur, and there is room for improvement in terms of reliability.

[0008]

SUMMARY OF THE INVENTION Therefore, the technical problem of the present invention is to use the shape memory effect and to improve the reliability and shape of the joint holding component having the function of facilitating the disassembly at the time of product disposal. It is to provide a method of improving the degree of freedom.

[0009]

The present invention has been made as a result of reexamination of the shape before and after the appearance of the shape memory effect of the joint holding component in order to solve the above problems.

That is, the present invention is a coupling and holding component having a function of fastening a plurality of members, which is made of a substantially cylindrical shape memory material and is provided with a slit over the entire length in the length direction. A joint holding component characterized in that, in a temperature range equal to or higher than a transformation temperature, a portion near the slit bends toward the inner peripheral side, and at the same time, the diameter contracts to lose the fastening function.

Further, according to the present invention, in the above-mentioned joint holding component, the width of the slit is 1/2 of the circumference of the joint holding component.
It is a joint holding member characterized by being 00 or less.

Also, the present invention is the above-described coupling and holding component, wherein a screw is provided on at least a part of the outer circumference.

Further, the present invention is the above-mentioned coupling and holding component, characterized in that it has display means of a fastening release function by heating.

[0014]

In the coupling and holding component according to the present invention, the shape change due to the shape memory effect is different from that of the conventional one, so that the diameter can be more greatly contracted when the product is disassembled. Therefore, the disassembling work can be performed more reliably and efficiently as compared with the case of using the conventional coupling and holding component having the same function.

Further, since the shape change form is different from the conventional one as described above, it is possible to reduce the slit width for contracting the diameter, which is 1 / l of the circumference of the joint holding component.
It can be 200 or less.

Further, since the joint holding component of the present invention can increase the degree of contraction of the diameter, it can be applied to a member such as a rivet, for example. Can also be used.

Further, the joint holding component of the present invention is improved in convenience by displaying the fact that the diameter is contracted by heating so that the joint can be released at a position, such as a part of the outer circumference, which is easily visible. It is possible to prevent accidents due to accidental overheating.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a view showing an example of a coupling and holding component according to the present invention. FIG. 1 (a) is a side view and FIG. 1 (b) is a view.
Is a front view. 2 is a diagram showing a shape recovery state of the coupling and holding component of FIG. 1, FIG. 2 (a) is a side view, and FIG.
(B) is a front view. Here, Ti-N is used as the material.
i-type shape memory alloy is used, shape recovery temperature is 90 ± 2 ℃
Is set to.

As shown in FIG. 1, this joint holding component 1
Reference numeral 00 denotes a rectangular wave-shaped slit 101 provided over the entire length, and a threaded portion 102 for cutting a male thread into which a nut is screwed on a part of the outer circumference and a non-threaded portion having a step for fitting a ring. It has 103. Further, a groove 104 for hanging a driver or the like is provided on one end surface.

Then, in the state where the shape recovery of the joint holding component is completed, as shown in FIG. 2 (a), the slit 201 is bent inward and the entire outer diameter is contracted. For this reason, when it becomes necessary to dismantle the product using this, the screw portion 202 and the nut (not shown)
On the contact surface between the contact surface with the inner circumference and the inner circumference of the ring (not shown) fitted to the non-screw part, a void corresponding to the reduced amount of the outer shape is formed, without any intervention, The connection of the plurality of parts or members is released.

FIG. 3 is a view showing a state in which two members are joined together by using the joint holding component of FIG. 1 and a nut and a ring, and FIG. 3 (a) is an overall view showing a part in section, Figure 3
FIG. 3B is a diagram showing a usage state of the ring, and FIG. 3C is a diagram showing a shape recovery state of the ring.

As shown in FIG. 3A, here, the joint holding component 300 is inserted into plate-like members 304 and 305 having holes for allowing the joint holding component 300 to pass therethrough.
The nut 303 and the ring 301 are fitted through the washer 302 to fasten the plate-shaped members 304 and 305.

As shown in FIGS. 3 (b) and 3 (c), the ring 301 is also made of a Ti-Ni type shape memory alloy, and in the shape-recovered state, the joint holding component is formed by enlarging the inner diameter. A looseness is generated between the outer periphery of 300 and the outer periphery of 300 so that it can be easily removed.

Incidentally, the nut 303 is also made of a shape memory material, and by providing the same structure as the ring 301, it is needless to say that the disassembly can be further facilitated, and the coupling holding part 3
It is also possible to have a structure in which a nut 303 can be screwed by cutting a male screw on the entire outer circumference of the No. 00 or both ends of the outer circumference.

4A and 4B are views showing an example in which the slit is a linear shape in the coupling and holding component of the present invention. FIG. 4A is a side view and FIG. 4B is a front view. FIG. 5 is a view showing the shape recovery state of the joint holding component shown in FIG. 4, and FIG.
Is a side view, and FIG. 5 (b) is a front view.

FIG. 6 shows a joint holding component of the present invention,
FIG. 6 is a diagram showing an example in which the slit has a substantially sinusoidal shape.
6A is a side view, and FIG. 6B is a front view. Similarly,
7A and 7B are diagrams showing a shape recovery state of the coupling and holding component shown in FIG. 6, FIG. 7A being a side view and FIG. 7B being a front view.

FIG. 8 is a diagram showing a case where the coupling holding component of the present invention is used as a rivet. FIG. 8 (a) is a side view,
FIG. 8B is a front view. 9 is a cross-sectional view showing a usage state of the joint holding component shown in FIG.

As shown in FIG. 8, this joint holding component 8
No. 00 has no screw or step on the outer circumference, and the slit 801 has a linear shape. When using this joint holding component, as shown in FIG. 9, a plate-like member 90 having holes is provided.
1, 902 are inserted into the coupling holding component 900, both ends are mechanically crushed, and the plate-shaped members 901, 902 are fastened.

Also in this case, the plate members 901 and 9
When separating 02, the joint holding component 900 is heated to bend the slit portion to the inner peripheral side and contract the outer diameter, so that the joint holding component 9 can be easily attached.
00 can be excluded.

[0030]

As described above, according to the present invention, there can be obtained a connecting and holding component which has a larger outer diameter contraction than the conventional one and can be efficiently disassembled. This facilitates the recovery of recyclable materials when disposing of industrial products such as home appliances. Moreover, since the coupling and holding component according to the present invention is less deformed by external force, it is possible to improve the reliability of the product to be used.

Here, as an embodiment, Ti
Although only the example using the -Ni-based shape memory alloy is shown, for example, an Fe-Mn-Si-based alloy can also be used, and if the members to be joined are plastic materials, the shape-memory effect is obtained. A polymeric material may be used.

[Brief description of drawings]

1A and 1B are views showing an example of a coupling and holding component according to the present invention, FIG. 1A is a side view, and FIG. 1B is a front view.

FIG. 2 is a view showing a shape-recovered state of the joint holding component of FIG.
2A is a side view and FIG. 2B is a front view.

FIG. 3 is a view showing a state in which two members are joined together by using the joint holding component of FIG. 1 and a nut and a ring, FIG.
Is an overall view showing a part in section, FIG. 3B is a view showing a usage state of the ring, and FIG. 3C is a view showing a shape recovery state of the ring.

FIG. 4 is a view showing an example in which a slit is a linear shape in the joint holding component of the present invention, FIG. 4 (a) is a side view, and FIG. 4 (b) is a front view.

5A and 5B are diagrams showing a shape recovery state of the joint holding component shown in FIG. 4, FIG. 5A is a side view, and FIG. 5B is a front view.

FIG. 6 is a view showing an example in which the slit is a substantially sinusoidal shape in the joint holding component of the present invention, FIG. 6 (a) is a side view,
FIG.6 (b) is a front view.

7A and 7B are diagrams showing a shape recovery state of the coupling and holding component shown in FIG. 6, FIG. 7A being a side view and FIG. 7B being a front view.

8A and 8B are views showing a case where the coupling and holding component of the present invention is used as a rivet, FIG. 8A is a side view, and FIG. 8B is a front view.

9 is a cross-sectional view showing a usage state of the coupling and holding component shown in FIG.

10A and 10B are views showing a coupling and holding component using a conventional technique, FIG. 10A is a side view, and FIG. 10B is a front view.

11A and 11B are diagrams showing a state in which the diameter of the coupling and holding component in FIG. 10 is contracted by a shape memory effect, FIG. 11A is a side view, and FIG. 11B is a front view.

[Explanation of symbols]

100,200,300,400,500,600,700,
800,900,1000,1100 Combined holding parts 101,201,401,501,601,701,801,
1001,1101 slits 102,202,402,502,602,702,100
2,1102 screw part 103,203,403,503,603,703,100
3,1103 Non-screw part 104,404,604,1004 Groove 301 Ring 302 Washer 303 Nut 304,305,901,902 Plate-shaped member

Claims (4)

[Claims] 1. A coupling and holding component having a function of fastening a plurality of members, which is made of a substantially cylindrical shape memory material, is provided with slits over its entire length in the longitudinal direction, and has a transformation temperature of the shape memory material or higher. In a temperature region, the vicinity of the slit is bent toward the inner peripheral side, and at the same time, the diameter is contracted, so that the fastening function is lost. 2. The joint holding component according to claim 1, wherein the width of the slit is 1/20 of the circumference of the joint holding component.
A bond holding member, which is 0 or less. 3. The coupling and holding component according to claim 1, wherein a screw is provided on at least a part of the outer circumference. 4. The coupling and holding component according to claim 1, further comprising display means for a function of releasing fastening by heating.