JPS608514A - connection structure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a connection structure for connecting a first member and a second member and fixing the connection.

Description of Prior Art There are various connection structures for connecting a first member and a second member. However, each of the conventionally employed connection structures has the following drawbacks.

For example, a connection structure using bolts has the disadvantage that if vibration is applied to the connection, the connection will loosen or be released. It may also be necessary to provide a threaded hole in, for example, the first or second member to receive the bolt.

However, depending on the material used, this thread cutting process may not be possible. Connections using bolts cannot be made to such materials.

Next, in the case of a connection structure using welding, brazing, etc., welding materials and special equipment are required to realize the connection. Therefore, the work becomes large-scale and the work efficiency is low. Furthermore, when connecting members by welding, brazing, etc., high heat is applied to the members. Therefore, materials that are adversely affected by high heat cannot be used. Furthermore, it is extremely difficult to connect and fix ceramics and metals using connection methods such as welding and brazing.

Purpose of the Invention The present invention was made in order to eliminate the above-mentioned drawbacks, and its main purpose is to enable connection to be made with a simple operation and to be able to be used in a wide range of applications without being limited to specific materials. The purpose is to provide a connection structure.

Structure of the Invention The present invention is a connection structure that connects a first member and a second member and fixes the connection. The first member includes
A protruding insertion protrusion is formed or attached having a length. The second member is formed with or attached to a receiving aperture adapted to receive the insertion projection. An engagement protrusion is formed on either the insertion protrusion or the receiving opening, and a protrusion receiving part that can be engaged with the engagement protrusion is formed on the other. When the insertion protrusion of the first member is inserted to a predetermined position within the reception opening of the second member, the engagement protrusion and the protrusion receiving part engage with each other. This engagement inhibits movement of the insertion projection within the receiving opening, thus securing the connection between the first and second members.

The present invention provides the above-mentioned connection structure, which has the following features.

First of all, the mutual dimensional relationship in the initial state between the engagement protrusion, the insertion protrusion and the receiving opening is suitably carried out so that the following condition is satisfied. The presence of the protrusion prevents the insertion movement of the insertion protrusion into position within the receiving opening.
If the mutual dimensional relationship in this initial state cannot be changed at all, it is impossible to insert the insertion protrusion to a predetermined position within the receiving opening. Alternatively, if the insertion protrusion is forcibly inserted, the initial dimensional relationship will certainly be disrupted upon insertion. However, if the broken dimensional relationship is left as it is, it is easy to move the insertion protrusion in the direction opposite to the insertion direction, and therefore the connection between the first member and the second member is fixed. Can not do it.

Accordingly, a second feature of the present invention is that at least one of the insertion protrusion and the receiving opening is made of a thermoelastic martensitic alloy exhibiting lateral elastic behavior.

A material exhibiting superelastic behavior deforms when an external stress is applied, as is well known in -1ffl, and returns to its original state when the external stress is removed. Since at least one of the insertion protrusion and the receiving opening is formed using a mature elastic martensitic alloy having such characteristics, the first
It becomes possible to connect the member and the second member and to fix the connection. That is, if the insertion protrusion is forcibly inserted and moved into the receiving opening, the mutual dimensional relationship in the initial state will be disrupted, thereby allowing the insertion protrusion to move to a predetermined position within the receiving opening. . On the other hand, when the insertion protrusion reaches a predetermined position and the engagement protrusion and the protrusion receiving part engage, the dimensional relationship between the engagement protrusion, the insertion protrusion, and the receiving opening returns to the initial state again.

Therefore, movement of the insertion protrusion in a direction opposite to the insertion direction is prohibited, thus fixing the connection between the first member and the second member.

In one embodiment according to the invention, the shape of the engagement protrusion is selected to satisfy the following conditions.

The first condition is that the insertion protrusion within the receiving opening can be moved relatively easily in the insertion direction. If the engaging protrusion has a shape that satisfies this condition, the force required to insert the insertion protrusion will be relatively small, making the connection work easier. The second condition is that when the engagement protrusion and the protrusion receiver are engaged, it is extremely difficult for the insertion protrusion to move in the direction opposite to the insertion direction. This is necessary to ensure a sufficient connection between the first and second members even if a large force is applied to the insertion protrusion trying to pull it out of the receiving opening. be done. Therefore, if the contact is such that such a large force is not applied to the insertion protrusion, this condition would be unnecessary.

The shape of the engaging protrusion that satisfies the first and second conditions is, for example, one in which the cross-sectional shape has at least one sawtooth shape.

In another embodiment according to the invention, the insertion protrusion has an overall cylindrical shape, and the engagement protrusion is formed over the entire circumference on the outer peripheral surface of the cylindrical insertion protrusion. Further, the cross-sectional shape of the engaging protrusion is serrated. Here, the diameter of the large diameter portion of the insertion projection defined by the tip of the engagement projection is D, the diameter of the small diameter portion of the insertion projection defined by the starting end of the engagement projection is d, and the diameter of the insertion projection defined by the tip of the engagement projection is d. The length in the axial direction of the insertion protrusion from the starting end to the tip. In this example, in order to better improve the workability associated with the connection and achieve more sufficient fixation of the connection, the j-modal relationship between D, d, and gloss is 0.005≦(D- d)/D≦0.1(D-d)
The shape of the engaging protrusion is selected so that Q≦0.03. In addition,(
If D-d)/D<0.005, the connection between the first member and the second member is insufficiently fixed or unstable. If (D-d)/D>0.1, it becomes difficult to insert the insertion protrusion into the receiving opening. Also, <D-
d), /2 > 0.03, the insertion of the insertion protrusion becomes difficult and the force required for insertion becomes considerably large.

The thermoelastic martensitic alloy used in this invention is
The composition must be such that it exhibits superelastic behavior.

An example of this is a composition in which Ni is 50 to 60% by weight and the balance is Ti. Also, other examples are 1. Part of N1 or T1 in the composition F is Fe 2 , Co 2 , or V within a range of '10Wffi96.

This is a composition in which at least one element selected from the group including Zr, C++, and All is substituted.

Furthermore, from a more practical standpoint, thermoelastic martensitic alloys have a transformation temperature of 150°C to +10°C.
Preferably, it is within the range of .

Effects of the Invention As described above, according to the present invention, the first member and the second member can be connected by simply inserting the insertion protrusion of the first member to a predetermined position within the receiving opening of the second member. Since the connection can be realized and the connection can be fixed,
The connection work becomes extremely simple. In addition, the configuration for realizing this connection structure does not require thread cutting, or apply high heat to the material during connection, such as welding, so it is not limited to a specific material, but can be used with any material. It is also possible to apply the connection structure according to the present invention. Furthermore, since the connection between the first member and the second member is fixed by utilizing the superelastic behavior of the heat-expanded type 8 martensitic alloy,
The connection does not loosen due to vibration, and the reliability of the connection is improved.

731N1 Referring to FIGS. 1 to 4, the insertion protrusion 2 was attached to the tip of the first member, the copper rod 1, by welding. This insertion protrusion 2), 1L, Ni 55.5 weight U%, T
Ni7i exhibits superelastic behavior with a composition of i44.5% by weight
It was made from an alloy (transformation temperature: -10°C) and had an overall cylindrical shape. Further, a retaining protrusion 3 having a sawtooth cross-sectional shape is formed on the outer peripheral surface of the insertion protrusion 2 over the entire circumference.

On the other hand, a receiving opening 5 was attached to the tip of the second member, the copper rod 4, by welding. This receiving opening 5
is made of the same NiTi alloy as the insertion protrusion 2, and a serrated protrusion receiving part 6 having a shape corresponding to the engagement protrusion 3 is formed on the inner surface of the mouth.

Then, as shown in FIG. 4, when the insertion protrusion 2 of the first member 1 is forcibly inserted to a predetermined position in the receiving opening 5 of the second member 4 at room temperature, the engagement protrusion 3 and protrusion receiving part 6
The first member 1 and the second member 4 were thus tightly connected and electrically connected.

Example 2 Referring to FIG. 5, an Nl'ri alloy (ffl
Two pipes 1 and 4 were prepared. Here, the pipe 1 is the first member, and the pipe 4 is the second member. At the tip of the first member 1, an insertion protrusion 2 was formed. On the other hand, at the tip of the second member 4, a receiving opening 5 having a shape corresponding to the insertion protrusion 2 was formed. When these two pipes 1 and 4 were butted against each other and firmly fitted together, they were tightly coupled and connected as shown in the figure. Also, water was run inside the pipe, but there was no leakage.

Example 3 Referring to FIG. 6, a Si8N4 plate 4 having a thickness of iQllm
A and a steel plate 4b having a thickness of 201 mm were prepared.

These two plates 4a and 4b constitute a second member.

Additionally, 55.5% by weight of Ni, T which exhibits superelastic behavior
i 44.5 wt% Ni Ti alloy (transformation temperature is -1
0°C) was prepared.

This bottle 1 constitutes the first member. The bottle 1 has an insertion protrusion 2, and on the outer peripheral surface of the insertion protrusion 2, an engagement protrusion 3 having a sawtooth cross-section is formed over the entire circumference. Here, the diameter of the large diameter portion of the insertion protrusion 2 defined by the tip of the engagement protrusion 3 is defined as D, and the engagement protrusion 3
If the diameter of the small diameter portion of the insertion protrusion defined by the starting end of is d, and the length in the axial direction of the insertion protrusion from the starting end to the tip of the engaging protrusion 3 is D-3,211.
1111°d-3mm and Q,-10mm.

Receiving openings 5a and 5b for receiving the insertion protrusion 2 were formed in the three plates 4a and 4b, respectively. The receiving opening 5a formed in the Si, N, plate 4a is a round hole with a diameter of 3 mm. Further, a sawtooth-shaped protrusion receiving part 6 having a shape corresponding to the engaging protrusion 3 of the insertion protrusion 2 was formed in the receiving opening 5b formed in the steel plate 4b.

The length in the axial direction from the end of the second engagement protrusion 3 of the bottle 1 to the head 1a of the bottle 1 was 1Q mm, and the diameter of that portion was 3+am.

The insertion protrusion 2 of the first member, the bottle 1, is inserted between two plates 4a.
When inserted into the receiving openings 5a and 5b formed in the steel plates 816N and 4b with a hammer, the plates 4a and 4b were tightly connected.

Note that the following relational expression was obtained from D, d, and the dimensions.

(D-d)/D←0.06 (D-d)/2 fl=tan α=0.2/20
=0.01 Example 4 Referring to FIG. 7, two SiC plates 4C with a thickness of 5n+m
Round holes 5C and 5d with a diameter of 5II1 m were drilled in each of holes 5C and 4d. These two plates 4C and 4d constitute a second member, and the round holes 5C and 5d constitute a receiving frontage. In addition, a bottle 1 with a head constituting the first member was prepared, and this bottle 1 was made of N155% by weight, 001% by weight,
The remainder is composed of Ti. The transformation temperature is -35°C. Further, the insertion protrusion 2 of the bottle 1 is formed with an engagement protrusion 3 having a sawtooth cross-section. Dimensionally, [
1=5.5ffill, d=5+nm, n=i
It was 0 mm.

Then, when the insertion protrusion 2 of the bottle 1 was inserted into the receiving opening 5 formed in the plates 4C and 4d using a mallet, the two plates 4C and 4d were tightly fixed.

Referring to Figure 8, insert the two insertion protrusions 2a and 2b.
A bottle-shaped first member 1 was prepared.

Serrated engagement protrusions 3 are formed on the insertion protrusions 2a and 2b. The first member 1 contains Nl 55°5% by weight,
Made from an alloy with a composition of balance T+.

In addition, two thick steel plates 4e and 4f with a thickness of 90m+n are prepared, and each plate has insertion protrusions 2a and 21, respectively.
) were formed into receiving openings 5e and 5t having shapes corresponding to the above. When the insertion protrusions 2a and 2b were inserted into the receiving openings 5e and 5r, respectively, the two thick steel plates 4e and 4f were tightly connected.

Example 6 A plurality of insertion protrusions 2 similar to Example 1 were prepared. Then, referring to FIG. 9, the shape of the engagement protrusion 3 formed on each insertion protrusion, that is, the dimensions of D9d and p2, was changed and the condition of the connection was investigated.

As a result, the following table was obtained. In the table, A=(D-d), /D is represented, and B=(D-d>/2 fL=tan a).

(Rejected margin) -j-1 10.02 0.01 It was easy to insert and the connection was perfect.

2 0.66 0,008 Same as above 3 0.04' 0. Oi2 Same as above 4 0.03 (1,01 Same as above 5 0.03, 0.1 The insertion was hard and the insertion work was difficult.

6 0.001 0.01 There were times when the fixation became unstable.

7 0.2 0. Oi It was difficult to insert.

3 0.2 0.1 I was unable to insert it at all.

From the results shown in the table, 0,'O05≦(D-d),'[)≦0, 1
It has been proven that the dimensional relationship of tan a -(D-d>,'2u≦0.03 is suitable.

[Brief explanation of the drawing]

1 to 4 are diagrams used to explain the first embodiment, and FIG. 1 shows the first member with the insertion protrusion attached to its tip. 1' perspective view, 2nd Fl is 1st in Fig. 1.
Figure 3 is a side sectional view of the second member with the receiving opening attached to the tip of the girder; Figure 4 is the side sectional view of the second member.
FIG. 6 is a side cross-sectional view showing a state when the insertion protrusion of the member is inserted to a predetermined position within the reception opening of the second member. FIG. 5 is a diagram used to explain Embodiment 2, and shows a pipe-shaped first member having an insertion protrusion formed at its tip, and a pipe-shaped first member having a receiving opening formed at its tip. FIG. 2 is a side sectional view showing a state of connection with a second member. 6th
The figure is a diagram used to explain Actual Flow Example 3, and is a side sectional view showing a connection state between a bottle-shaped first member and a plate-shaped second member. FIG. 7 is a diagram used to explain LJ practical rotation example 4, and is a side sectional view showing a connection state between a bottle-shaped first member and a plate-shaped second member. Fig. 8 is a diagram used to explain Example 5, and (a) shows a bottle-shaped first member having two insertion protrusions, and a second member that engages with each insertion protrusion.
A side sectional view showing a plate-shaped second member, (b)
) is a side sectional view showing the connection state between the first member and the second member shown in FIG. FIG. 9 is a diagram used to explain Infusion Example 6, and is a diagram for clarifying the shape of the engagement projection formed on the insertion projection. In the figure, 1μ is the first member, 2 is the insertion protrusion, 3 is the engagement protrusion, 4 is the second member, 5 is the receiving opening, and 6 is the protrusion receiver. (2 idiots)

Claims (1)

[Scope of Claims] (1) Insert one part of the insertion hole j of the first member into the receiving opening of the second member to a predetermined position i: the insertion protrusion or the receiving opening. The engagement protrusion formed on one of the first and second protrusions engages with the protrusion receiving part formed on the other, thereby inhibiting movement of the insertion protrusion within the receiving opening. A connection structure in which a connection between a member and the second member is fixed, wherein the mutual dimensional relationship in an initial state between the engagement protrusion, the insertion protrusion, and the receiving opening is as follows: is selected such that the presence of the insertion projection prevents insertion hooking into position of the insertion projection within the receiving opening, and at least one of the insertion projection or the receiving opening exhibits superelastic behavior. Therefore, if the insertion protrusion is forcibly inserted and moved into the receiving opening, the dimensional relationship will be disrupted, and as a result, the insertion protrusion will be forced into the receiving opening. When the insertion protrusion reaches the predetermined position and the engagement protrusion and the protrusion receiving part engage, the engagement protrusion and the insertion protrusion and a connection structure in which the dimensional relationship between the receiving opening returns to the initial state, thereby prohibiting movement of the insertion protrusion in a direction opposite to the insertion direction. (2) The shape of the engagement protrusion is such that it satisfies the following conditions: (1) the insertion protrusion can be relatively easily moved in the insertion direction within the receiving opening; The insertion projection according to claim 1, wherein the insertion projection is selected so that it is extremely difficult to move the insertion projection in a direction opposite to the insertion direction when the projection and the projection receiving portion are engaged. connection structure. (3) The engaging protrusion has a cross-sectional shape of at least 1
The contact 1 according to claim 2, which has two serrations! structure. (4) The insertion protrusion has a cylindrical shape as a whole, and the engagement protrusion is formed over the entire circumference on the outer peripheral surface of the insertion protrusion, and has a sawtooth cross-sectional shape; The diameter of the large diameter portion of the insertion protrusion defined by the tip of the insertion protrusion is D, the diameter of the small diameter portion of the insertion protrusion defined by the starting end of the engagement protrusion is d, and from the starting end of the engagement protrusion If the axial length of the insertion protrusion up to the tip is 琵, then 0.005≦(D-d)/D≦0.1(D-d)/2
3. The connection structure according to claim 1 or 2, wherein the shape of the engaging protrusion is selected so as to obtain the relationship Q≦0.03. (5) The thermoelastic martensitic alloy has N1 of 5
0 to 60% by weight, the balance being TI, or a part of N1 or T1 is Fe, Co, V, Zr within 10% by weight. The connection structure according to any one of claims 1 to 4, which has a composition substituted with at least one element selected from the group including C11 and AQ. (6) The connection structure according to any one of claims 1 to 5, wherein the thermoelastic martensitic alloy has a transformation temperature within a range of -50°C to +10°C.