JPH04127408U - Insert adhesive bonding structure - Google Patents

Abstract

(57) [Summary] [Purpose] A member with weak adhesive strength and a member with strong adhesive strength are inserted into a hole and joined together with an adhesive to strengthen the joint strength. [Structure] An axial hole 13 is formed at one end of the second shaft 12 made of brass, a ring-shaped groove 14 is formed on the circumferential surface of the hole 13, and the first shaft 11 made of resin material is inserted into the hole 13. At the same time, it is bonded with an adhesive 15. The adhesive 15 in the groove 14 becomes a hardened protrusion 15a and strongly adheres to the first shaft 11, and the protrusion 15a and the groove 14 are strongly coupled in the axial direction.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea can be applied, for example, to connecting the shafts of electronic components, and is relatively difficult for adhesives to stick to. Insert the member and the member to which adhesive is relatively easy to adhere into one hole, and then The present invention relates to an insertion adhesive bonding structure in which mutually opposing circumferential surfaces of two pieces are bonded with an adhesive.

0002

[Conventional technology]

Conventionally, a first shaft of a resin material is inserted into a hole of a second shaft of a metal material, and an adhesive When bonding with Since the adhesive strength is weak, the adhesive strength between the first shaft and the second shaft is also weak. In such a case, to increase the adhesive strength, increase the depth of the second axis hole or The idea is to increase the diameter and increase the area of the opposing (joint) peripheral surfaces of the first and second shafts. However, it may not be possible to deepen the hole or increase the hole diameter in this way. Ru. In addition, the amount of adhesive is increased by increasing the distance between the outer peripheral surface of the first shaft and the inner peripheral surface of the hole of the second shaft. It is conceivable to increase the size, but the adhesive strength will not improve that much, and the mutual axes will be There is a risk that it may become misaligned.

0003

[Means to solve the problem]

According to this invention, the bonding strength is A groove is formed and an adhesive is filled into the groove.

0004

【Example】

An embodiment of this invention will be described with reference to the drawings. As shown in Figure 1A, the adhesive strength is In this example, the first shaft 11 as a strong member is made of PPS (polyphenylene sulfide). D) The first shaft 11 is made of resin, and the first shaft 11 extends from one end surface of the second shaft 12 shown in FIG. 1B. As an example, a case is assumed in which the core is inserted into a hole 13 formed along the core and bonded. No. The two shafts 12 are made of a member with weak adhesive strength, for example, brass. Also used as adhesive For example, a one-component room temperature curing cyano type instant adhesive is used.

[0005] In this device, the inner peripheral surface of the hole 13 of the second shaft 12, which has the weaker adhesive strength, is attached in the axial direction. In this example, a groove 14 extending along the circumferential direction at the intermediate portion is formed in a ring shape. No. Apply adhesive to the outer peripheral surface of the insertion part of the first shaft 11, and apply adhesive to the inner peripheral surface of the hole 13 of the second shaft 12. 1C, fit and insert the first shaft 11 into the hole 13, and apply adhesive 15. The opposing peripheral surfaces of the first shaft 11 and the second shaft 12 are bonded to each other. At this time, adhesive 15 is filled into the groove 14.

[0006] In other words, the adhesive 15 is firmly attached to the first shaft 11, and the adhesive in the groove 15 is hardens and becomes a ring-shaped protrusion 15a of adhesive on the circumferential surface of the first shaft 11, firmly adhering it. The state will be as follows. Therefore, although the adhesive strength between the second shaft 12 and the adhesive 15 is weak, the contact The ring-shaped protrusion 15a of the adhesive and the groove 14 of the second shaft 12 are engaged in the axial direction, and the first shaft 1 1 and the second shaft 12 are firmly coupled in the axial direction.

[0007] For example, a hole 13 with a depth of 4 mm and a diameter of 1.9 mm has a depth of 0.3 mm at a depth of 2 mm. When a 90° triangular groove 14 of mm was formed, the pull force was more than twice that of the case without the groove 14. Tensile strength was obtained. In the above, the first shaft 11 is a member with weak adhesive strength, and the second shaft 1 2 has a strong adhesive strength, a groove 14 is formed along the outer circumferential surface of the first shaft, which has a weak adhesive strength. It can be formed by In either case, the groove 14 is formed in the circumferential direction, but in a ring shape. It doesn't have to be. Furthermore, a plurality of grooves 14 may be formed in the axial direction.

[0008]

[Effect of the idea]

As mentioned above, according to this invention, the joint facing peripheral surface of the member with weaker adhesive strength A groove is formed along the circumferential direction, and the groove is filled with adhesive to form a hardened protrusion. Since this is firmly bonded to a member with strong adhesive strength, the groove and this protrusion allow the shaft to strongly coupled in the direction. A strong adhesive bond is thus obtained. For this reason, the adhesive surface There is no need to widen the area, that is, there is no need to deepen the pores or increase the pore diameter. Moreover, there is no need to use a large amount of adhesive, and the distance between the opposing circumferential surfaces of both members can be made small. and there is little misalignment of the axis.

[Brief explanation of drawings]

[Fig. 1] A is a side view showing the first axis as a member with strong adhesive strength, B is a sectional view showing the second axis as a member with weak adhesive strength, and C is a sectional view showing an embodiment of this invention. be.

Claims (1)

[Scope of utility model registration request] Claim 1: Inserting one member into a hole in the other member,
In an insertion adhesive bonding structure in which the inserted mutually facing peripheral surfaces are bonded with an adhesive, and the two members have different adhesive strengths to the adhesive, the opposing peripheral surfaces of the member with the weaker adhesive strength are bonded to the opposite peripheral surfaces of the inserted member. An insertion adhesive bonding structure characterized in that a groove is formed along a direction, and the groove is filled with the adhesive.