JPH09112517A - Connecting member for brittle member and metallic member and connecting method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate working and connecting work by forming the connecting member consisting of a metallic shaft so as to have a large diameter part that is to be inserted into the connecting hole of a brittle member and a small diameter part that is projected from the connecting hole, and by forming slits for axially dividing the small diameter part and the large diameter part through the penetrating hole penetrating the large diameter part. SOLUTION: When a brittle member and a metallic member are combined, the large diameter part 2 of a connecting member 10 is pressedly reduced and inserted into the connecting hole of a brittle member 20. The inner part 22 of the connecting hole is formed so as to be slightly wider than the large diameter part 2, and when the large diameter part 2 is housed in this part 22, the pressing pressure is released so that it is returned to its original shape, and the step difference 4 (not shown) in the outer circumference of the connecting member 10 is engaged with the difference step 24 of the connecting hole for preventing the slipping off. Then, a pin 30 is inserted into the penetrating hole 5 (not shown) of the connecting member 10, and the large diameter part 2 is pressedly widened, so that the play of the connecting member 10 is eliminated, and the connecting member 10 and the connecting hole are strongly connected. By further screwing the end 31 of the pin into the bottom surface of the connecting hole, the connecting member 10 is pushed up, so that the difference step 4 is pushed against the difference step 24, and it is further strongly fixed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joining member for joining a concrete member, a ceramic member, a cermet member or a member made of a composite material thereof (hereinafter referred to as a brittle member) and a metal member. And a method of combining the same.

[0002]

2. Description of the Related Art Since brittle materials and metals are not chemically bonded, bonding with an adhesive or mechanical bonding means is required. The mechanical connection method includes (a) a method of fastening both with screws, (b) a method of pressing a metal shaft slightly thicker than the hole of the brittle member into the hole with a press or the like, and fixing it. (C) A method of using a metal shaft having a diameter slightly larger than the hole of the brittle member, heating or cooling the hole or the shaft of the brittle member, inserting the shaft into the hole by utilizing thermal expansion, and fixing the shaft, etc. Has been implemented conventionally.

However, in the case of bonding with an adhesive, the adhesive strength depends on its composition, and it takes time to dry and cure after bonding, and generally, heat resistance, corrosion resistance and chemical stability are poor. In addition, with the above-mentioned (a) screw fastening, it is difficult to thread the holes of the brittle member, and the screw thread is easily damaged when the metal member is screwed in, so the mechanical strength after fastening is also extremely high. Weak to. With the press-fitting, shrink-fitting, and shrink-fitting of (c) and (b) above, it is necessary to have processing accuracy that can handle the difference in thermal expansion, but it is difficult to process brittle members, and press-fitting devices such as presses are difficult. Since it is necessary, the work process becomes complicated,
The mechanical strength after joining is also weak.

[0004]

DISCLOSURE OF THE INVENTION The present invention relates to a joining member or a joining method which solves the above-mentioned conventional problems in joining a brittle member and a metallic member, and a joining member or a joining member which is easy to process and join and has a large joining strength. It is an object to provide a coupling means and a coupling method thereof.

[0005]

That is, according to the present invention, there is provided the following connecting member as set forth in claim 1. (1) A coupling member made of a metal shaft, the metal shaft having a large diameter portion to be inserted into a coupling hole of a brittle member and a small diameter portion protruding from the coupling hole, the large diameter portion and the small diameter portion being a shaft. Are formed on the outer circumference thereof, and a through hole penetrating the small diameter portion and the large diameter portion, and a slit for dividing the large diameter portion in the axial direction through the through hole are provided. The connecting member is characterized in that the tip of the small diameter portion forms a connecting portion with the metal member.

In the following aspects described in claims 2 to 7, the above-mentioned connecting member has a larger fixed strength and a stable connected state can be obtained. (2) The coupling member according to (1), which has a straight or tapered pin that is inserted into the through hole. (3) A pin is screwed into the through hole, the tip of the pin abuts against the bottom of the coupling hole of the brittle member, and the screwing of the pin presses the step on the outer periphery of the coupling member against the step of the coupling hole. The connecting member according to (2) above, which is fixed. (4) The connecting member according to any one of the above (1) to (3), in which a connecting head for connecting with a metal member is attached to the small diameter portion or the tip portion of the pin. (5) The connecting member according to any one of (1) to (3), wherein the small diameter portion or the tip of the pin is a part of a metal member. (6) The coupling member according to any one of (1) to (5) above, wherein the metal shaft has a triangular or square cross section. (7) The coupling member according to any one of (1) to (6) above,
A joining means comprising a stepped joining hole having a large diameter on the inner side of the brittle member into which the joining member is inserted.

Further, according to the present invention, there is provided the following joining method described in claims 8 and 9 using the joining member. (8) Using the connecting member according to any one of (1) to (6), the large diameter portion of the connecting member is inserted into the connecting hole of the brittle member in a constricted state, and then the connecting member is inserted. By inserting the pin into the through hole of the member and widening the large diameter portion, the step on the outer periphery of the coupling member is bitten into and fixed to the inner surface of the coupling hole, and the small diameter portion or pin of the coupling member protruding from the coupling hole is fixed. A method for bonding a brittle member and a metal member, which comprises bonding the metal member through the metal member. (9) After inserting the joining member into the stepped joining hole having a large depth of the brittle member, insert the pin into the through hole to push out the large diameter portion,
The joining method according to (8) above, wherein the step on the outer periphery of the joining member is engaged with and fixed to the step on the joining hole.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The connecting member and the connecting method of the present invention will be described in detail with reference to the illustrated embodiments. 1 and 2 are external views of a coupling member of the present invention, FIGS. 3 and 4
Shows the connecting hole of the brittle member, and FIGS. 5 to 7 are sectional views or external views showing the connected state. The following is an example of the present invention and does not limit the scope of the invention.

(I) Coupling Member As shown, the coupling member 10 of the present invention is formed by the metal shaft 1. The metal shaft 1 has a large diameter portion 2 and a small diameter portion 3 which are continuous in the axial direction.
A step 4 along the radial direction is formed on the outer circumference by the small diameter portion 3. Further, a through hole 5 is provided at the center of the metal shaft 1 so as to penetrate the large diameter portion 2 and the small diameter portion 3 in the axial direction, and a plurality of slits 6 for dividing the large diameter portion 2 in the axial direction through the through hole 5. Is provided.

The slit 6 uses the elasticity of the metal shaft 1 to compress the large diameter portion 2 and insert it into the hole 21 of the brittle member 20, and restore the large diameter portion 2 to the original shape inside the hole 21. Alternatively, it is for widening, and in the illustrated embodiment, it is provided radially so as to divide the large diameter portion 2 into four through the through hole 5 in the axial direction, and it is sufficient for this elastic deformation to sufficiently function. It has a wide slit width and extends from the large diameter portion 2 to the central portion of the small diameter portion 3.

The connecting member 10 preferably has a pin 30 inserted into the through hole 5. It is preferable that the pin 30 has a length that penetrates the metal shaft 1, has a thread groove at its tip, and is screwed into the through hole 5 of the large diameter portion 2. The pin 30 may be a straight pin or a tapered pin. A connecting head 40 for joining with a metal member is mounted on the upper end of the pin 30 or the small diameter portion 3. As shown in FIG. 7, an example of the connecting head 40 has a square hole 41 into which a wrench is inserted, and a cutout 42 for preventing rotation, which is not limited to this. Absent.

The connecting hole 21 of the brittle member 20 is preferably a stepped hole having a large diameter on the inner side, but may be a tapered hole having a narrow entrance and a wide inner side. The illustrated coupling hole 21 is a stepped hole, the inner portion 22 has a length for accommodating the large diameter portion 2 of the coupling member 10, and the inlet-side portion 23 of the coupling hole 21 is the coupling member 10. The diameter is the same as or slightly larger than that of the small-diameter portion 3, and thus a step 24 that engages with the step 4 of the coupling member 10 is formed. Further, when the joining member 10 is inserted into the joining hole 21, the tip of the small-diameter portion 3 is attached to the joining hole 21.
The length of the inlet side portion 23 of the coupling hole 21 is shorter than that of the small diameter portion 3 so as to project from the above.

In the illustrated embodiment, the coupling member 10 and the coupling hole 21 have a circular cross section, but they may have a triangular or square cross section, and those having such a cross sectional shape have a force around the axis. When it acts, the side surface thereof abuts the inner peripheral surface of the coupling hole, so that the rotation around the axis is prevented.

(II) Joining Method The joining member 10 is inserted into the joining hole 21 of the brittle member 20 by pressing the large diameter portion 2 to reduce the diameter. Since the inner portion 22 of the coupling hole 21 is formed to be slightly wider than the large diameter portion 2, the large diameter portion 2 of the coupling member 10 has this portion 22.
When it fits in, the pressing of the large diameter part 2 is released and it returns to the original shape,
Since the step 4 on the outer periphery of the coupling member engages with the step 24 of the coupling hole 21, the slip-off is prevented. Further, if an elastic material such as a spring material is used as the material of the coupling member 10, the original shape is surely restored. In the case of a tapered hole on the inlet side, the step 4 of the coupling member bites into the inclined inner peripheral surface, so that the same effect as the stepped hole can be obtained.

Subsequently, when the pin 30 is inserted into the through hole 5 of the connecting member 10 and the large diameter portion 2 at the tip of the connecting member is pushed wide, the rattling of the connecting member 10 is eliminated and the connecting member 10 and the connecting hole 21 are strengthened. Be combined. Further, in the case where a screw is provided at the tip of the pin 30 and is screwed into the large diameter portion 2 of the coupling member, screw in until the tip 31 of the pin 30 abuts on the bottom surface of the coupling hole 21, and further screw in. Thus, the inner peripheral surface of the large-diameter portion 2 of the coupling member 10 and the outer periphery of the pin 30 are meshed with each other by the thread groove, so that the coupling member gradually becomes the pin 30
Since the step 4 on the outer periphery of the coupling member is strongly pressed against the step 24 of the coupling hole 21, a force that strongly presses between the bottom of the coupling hole and the step acts, and the coupling member 10 is placed inside the coupling hole. It is fixed more firmly.

After fixing the joining member 10 to the brittle member 20, as shown in FIG. 7, a connecting head 40 is attached to the tip of the joining member small-diameter portion 3 or the tip of the pin 30, and the connecting head 40 is inserted through the head 40. A metal member (not shown) is joined. Also,
The small diameter portion 3 or the pin 30 of the coupling member 10 may be integrated with the metal member. Further, the pin 30 may be formed of a tip end portion that spreads the slit portion of the coupling member and a rear end portion that is separable from the tip end portion.

[0017]

The joining member of the present invention is easy to insert into a brittle member and has a large joining strength. Further, since it is not necessary to provide a thread groove or the like in the brittle member, it is easy to process the coupling hole, there is no problem such as damage to the screw thread, and mechanical strength is high and a highly reliable coupled state can be achieved. In addition, since it does not use an adhesive, it has excellent heat resistance, as well as corrosion resistance and chemical stability against acids, alkalis and organic solvents, no curing period is required, and bonding in a short time The workability is remarkably good because the work can be completed and no special tool or device is required.

[Brief description of the drawings]

FIG. 1 shows a coupling member according to the present invention, (a) is a front view thereof, and (b) is a plan view thereof.

FIG. 2 is an external perspective view of a coupling member according to the present invention,
(A) is the figure seen from the small diameter part side, (b) is the figure seen from the large diameter part side.

FIG. 3 shows a bonding hole of a brittle member according to the present invention, (a)
Is a sectional view thereof, and (b) is a plan view thereof.

FIG. 4 is an external view illustrating a state in which a coupling member is embedded in a coupling hole.

FIG. 5 shows a state in which a coupling member is embedded in a coupling hole,
(A) is a longitudinal sectional view and (b) is a plan view thereof.

FIG. 6 is an external perspective view showing a state in which a pin is attached to the coupling member.

FIG. 7 is an external perspective view showing a state in which a connecting head is attached to a connecting member.

[Explanation of symbols]

1-metal shaft, 2-large diameter part, 3-small diameter part, 4-step, 5-through hole, 6-slit, 10-coupling member, 20
-Fragile member, 21-Coupling hole 22-Deep side part, 23-Inlet side part, 24-Step, 30
-Pin, 31-Tip 40-Connecting head, 41-Square hole, 42-Notch.

Claims (9)

[Claims] 1. A coupling member comprising a metal shaft, the metal shaft having a large diameter portion to be inserted into a coupling hole of a brittle member and a small diameter portion protruding from the coupling hole, the large diameter portion and the small diameter portion. Are connected in the axial direction, whereby a step along the radial direction is formed on the outer periphery thereof, and a through hole penetrating the small diameter portion and the large diameter portion, and a slit dividing the large diameter portion in the axial direction through the through hole. And a tip end portion of the small diameter portion forms a joint portion with the metal member. 2. The connecting member according to claim 1, further comprising a straight or tapered pin inserted into the through hole. 3. A pin is screwed into the through hole, the tip of the pin abuts against the bottom of the coupling hole of the brittle member, and the step of the outer periphery of the coupling member is pressed against the step of the coupling hole by screwing the pin. The coupling member according to claim 2, which is fixed by being fixed. 4. The connecting head for connecting with a metal member is mounted on the small diameter portion or the tip portion of the pin.
The coupling member according to any one of 1 to 3. 5. The coupling member according to claim 1, wherein the small diameter portion or the tip of the pin is a part of a metal member. 6. The coupling member according to claim 1, wherein the metal shaft has a triangular or square cross section. 7. A coupling means comprising the coupling member according to claim 1 and a stepped coupling hole having a large diameter on the inner side of the brittle member into which the coupling member is inserted. 8. The connecting member according to claim 1, wherein the large diameter portion of the connecting member is inserted into the connecting hole of the brittle member in a constricted state, and then the connecting member is inserted. By inserting a pin into the through hole and pushing out the large diameter portion, the step on the outer periphery of the coupling member is bitten into and fixed to the inner surface of the coupling hole, and the metal member is attached to the small diameter portion of the coupling member protruding from the coupling hole. A method for joining a brittle member and a metal member, which comprises bonding. 9. The brittle member is inserted into the stepped joint hole having a large depth, and then the pin is inserted into the through hole to widen the large diameter portion so that the step on the outer periphery of the joint member is connected to the step of the joint hole. The joining method according to claim 8, wherein the joining and fixing are performed.