JP2013170672A - Fitting structure and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an adhesive from being cut out at an end surface of a fitting side of a cylindrical member when a fitting structure is manufactured where a bar-like member is internally fitted into the cylindrical member.SOLUTION: In a method of manufacturing a fitting structure 100 where a bar-like member 20 is internally fitted in a cylindrical member 10, the bar-like member 20 having an outer peripheral groove 21 continuously extending in the length direction in an outer peripheral surface is internally fitted into the cylindrical member 10 having a through hole 11 penetrating from the outer peripheral surface to the inside while being positioned so that the through hole 11 of the cylindrical member 10 communicates with the outer peripheral groove 21 of the bar-like member 20. Then, an adhesive 30 is injected from the through hole 11 of the cylindrical member 10, and the adhesive is filled into a region between the inner wall of the cylindrical member 10 and the outer peripheral groove 21 of the bar-like member 20.

Description

  The present invention relates to a fitting structure and a manufacturing method thereof.

  A fitting structure in which a rod-like member is fitted in a cylindrical member can be seen in many scenes.

  For example, Patent Document 1 discloses a temperature sensor having a fitting structure in which a nonmagnetic rod is fitted into a cylindrical permanent magnet.

Japanese Patent Laid-Open No. 5-66158

  By the way, as a general method for fitting and fixing a rod-shaped member to the cylindrical member, there is a method of applying an adhesive to the outer peripheral surface of the rod-shaped member and fitting it into the cylindrical member.

  However, in this method, since the adhesive applied to the outer peripheral surface of the rod-shaped member is scraped at the end surface on the fitting side of the cylindrical member, it is necessary to wipe it off.

  An object of the present invention is to prevent an adhesive from being scraped at an end surface on the fitting side of a cylindrical member when manufacturing a fitting structure in which a rod-shaped member is fitted into the cylindrical member. .

The present invention is a method for manufacturing a fitting structure in which a rod-like member is fitted in a cylindrical member,
A cylindrical member in which a through-hole penetrating from the outer peripheral surface to the inside is formed, a rod-shaped member in which an outer peripheral groove extending continuously in the length direction is formed on the outer peripheral surface, and the through-hole of the cylindrical member is the rod-shaped member After positioning and fitting so as to communicate with the outer peripheral groove of the cylindrical member, an adhesive is injected from the through-hole of the cylindrical member, and the region between the inner wall of the cylindrical member and the outer peripheral groove of the rod-shaped member is injected. The adhesive is filled.

The present invention is a fitting structure in which a rod-like member is fitted in a cylindrical member,
A through-hole penetrating from the outer peripheral surface to the inside is formed in the cylindrical member, and an outer peripheral groove extending continuously in the length direction is formed on the outer peripheral surface of the fitting portion of the rod-shaped member,
The rod-shaped member is bonded to the tubular member via an adhesive filled in a region between the inner wall of the tubular member and the outer peripheral groove of the rod-shaped member.

  According to the present invention, after the rod-shaped member is fitted into the tubular member, the adhesive is injected from the through hole of the tubular member, and the adhesive is applied to the region between the inner wall of the tubular member and the outer peripheral groove of the rod-shaped member. Therefore, the adhesive is not scraped at the end face on the fitting side of the cylindrical member.

(A)-(c) is a perspective view which shows the manufacturing method of the fitting structure which concerns on embodiment. (A)-(c) is a longitudinal cross-sectional view which shows the manufacturing method of the fitting structure which concerns on embodiment. It is a longitudinal cross-sectional view which shows the modification of the manufacturing method of the fitting structure which concerns on embodiment. (A) is a longitudinal cross-sectional view which shows the aspect in which the outer periphery groove | channel was provided in the dense pitch, (b) is a longitudinal cross-sectional view which shows the aspect in which the outer periphery groove | channel was provided in the coarse pitch. (A) is a longitudinal cross-sectional view which shows another modification of the manufacturing method of the fitting structure which concerns on embodiment, (b) and (c) are the cross-sectional views. (A) is a longitudinal cross-sectional view which shows the aspect which one location of the outer periphery groove | channel exposed to the through-hole for adhesive agent injection | pouring, (b) is the aspect which two locations of the outer periphery groove | channel were exposed to the through-hole for adhesive agent injection | pouring FIG. (A) is a top view of the fiberscope to which the manufacturing method of the fitting structure which concerns on embodiment is applied, (b) is a figure which shows the internal structure of the objective part. (A) is a top view of the fiber bundle to which the manufacturing method of the fitting structure which concerns on embodiment is applied, (b) is a figure which shows the internal structure of the connection part.

  Hereinafter, embodiments will be described in detail based on the drawings.

  1A to 1C and 2A to 2C show a method for manufacturing the fitting structure 100 according to the embodiment.

  In the manufacturing method of the fitting structure 100 according to the present embodiment, the outer peripheral groove 21 extending continuously in the length direction is formed on the outer peripheral surface in the cylindrical member 10 in which the through hole 11 penetrating from the outer peripheral surface to the inside is formed. The formed rod-shaped member 20 is fitted inside. At that time, alignment is performed so that the through hole 11 of the tubular member 10 communicates with the outer peripheral groove 21 of the rod-shaped member 20. Then, after fitting the rod-shaped member 20 into the tubular member 10, the adhesive 30 is injected from the through hole 11 of the tubular member 10, and the inner wall 12 of the tubular member 10 and the outer peripheral groove 21 of the rod-shaped member 20 are The adhesive 30 is filled in the area between.

  According to the manufacturing method of the fitting structure 100 according to the present embodiment, after the rod-like member 20 is fitted into the tubular member 10, the adhesive 30 is injected from the through hole 11 of the tubular member 10, and the tubular member 10. Since the adhesive 30 is filled in the region between the inner wall 12 and the outer peripheral groove 21 of the rod-shaped member 20, the adhesive 30 is not scraped at the end face on the fitting side of the tubular member 10, and is therefore unnecessary. It is not necessary to wipe off the adhesive 30. Moreover, even when the clearance between the cylindrical member 10 and the rod-shaped member 20 is very small, the adhesive 30 can be reliably interposed between them.

  The material for forming the cylindrical member 10 is not particularly limited. For example, super engineering plastics such as PEEK (polyether ether ketone), PPS (polyphenylene sulfide), and API (polyimide); PC (polycarbonate), Engineering plastics such as PBT (polybutylene terephthalate) and POM (polyacetal); General-purpose plastics such as ABS (acrylic tolyl butadiene styrene) and PP (polypropylene); Metals such as stainless steel, brass, aluminum, iron and copper .

  The cross-sectional shape of the outer shape of the cylindrical member 10 is not particularly limited, and examples thereof include polygons such as an ellipse and a rectangle in addition to a circle. The cross-sectional shape of the outer shell of the cylindrical member 10 is not particularly limited, and examples thereof include a circular shape and a polygonal shape such as an elliptical shape and a rectangular shape. The cross-sectional shape of the outer shape of the tubular member 10 and the cross-sectional shape of the hollow portion outline may be the same or different. The inner wall 12 of the cylindrical member 10 may be formed on a smooth surface or may be formed on a surface having irregularities. The tubular member 10 has, for example, a length of 10 to 300 mm, a maximum outer diameter of 1 to 100 mm, and a maximum inner diameter of 0.5 to 95 mm.

  The through-hole 11 for injecting the adhesive formed in the tubular member 10 only needs to have a shape and a hole diameter into which, for example, a dispenser needle 40 for injecting the adhesive 30 can be inserted. For example, the shape is circular and the hole diameter is 0.1 to 10 mm. There may be only one through hole 11 for injecting adhesive, or a plurality of through holes 11.

  The cylindrical member 10 is formed with another through hole 13 for confirming the arrival of the adhesive penetrating from the outer peripheral surface to the inside at a position spaced from the through hole 11 for injecting the adhesive. When the rod-shaped member 20 is fitted into the cylindrical member 10, it is preferable to align so that the through hole 13 for confirming the arrival of the adhesive of the cylindrical member 10 communicates with the outer peripheral groove 21 of the rod-shaped member 20. If it does in this way, by inject | pouring the adhesive 30 from the through-hole 11 for adhesive injection | pouring until the adhesive 30 is visually recognized from the through-hole 13 for adhesive arrival confirmation, it is rod-shaped between them. It can be confirmed that the outer peripheral groove 21 of the member 20 is reliably filled with the adhesive 30, thereby preventing an unnecessary large amount of the adhesive 30 from being injected. Moreover, the air in the outer peripheral groove 21 of the rod-like member 20 filled with the adhesive 30 can be discharged from the through hole 13 for confirming the arrival of the adhesive, thereby suppressing the adhesive 30 from entraining bubbles. Can do. The through hole 13 for confirming the arrival of the adhesive may be formed at a position that is straightly spaced from the through hole 11 for injecting the adhesive in the tubular member 10 along the length direction. The cylindrical member 10 may be formed at a position spaced from the through hole 11 for injecting the adhesive in the length direction and rotated in the circumferential direction.

  When the through hole 13 for confirming the arrival of the adhesive is formed in the tubular member 10, the through hole 11 for injecting the adhesive and the through hole 13 for confirming the arrival of the adhesive are provided one by one. The former may be positioned corresponding to one end of the outer peripheral groove 21, and the latter may be positioned corresponding to the other end. Further, as shown in FIG. 3, one through-hole 11 for injecting adhesive and two through-holes 13 for confirming the arrival of adhesive are provided, corresponding to the midpoint of the outer peripheral groove 21 of the rod-shaped member 20. The configuration may be such that the adhesive injection through-hole 11 is positioned and the adhesive arrival confirmation through-hole 13 is positioned corresponding to each of the one end and the other end. When the viscosity of the adhesive 30 is low, there is not much difference in filling workability of the adhesive 30 between the former configuration and the latter configuration, but when the viscosity of the adhesive 30 is high, in the latter configuration, Since the flow length of the adhesive 30 can be shortened, the filling workability of the adhesive 30 is superior to the former configuration. Three or more through holes 13 for confirming the arrival of the adhesive may be provided.

  The length of the through hole 13 for confirming the arrival of the adhesive from the through hole 11 for injecting the adhesive is, for example, 5 to 150 mm. The shape and the hole diameter of the through hole 13 for confirming the arrival of the adhesive are not particularly limited as long as the purpose of confirming the arrival of the adhesive 30 and discharging the air in the outer peripheral groove 21 of the rod-shaped member 20 is achieved. The through hole 11 for injecting the adhesive may be smaller.

  The material for forming the rod-shaped member 20 is not particularly limited. For example, super engineering plastics such as PEEK (polyether ether ketone), PPS (polyphenylene sulfide), API (polyimide); PC (polycarbonate), PBT Examples include engineering plastics such as (polybutylene terephthalate) and POM (polyacetal); general-purpose plastics such as ABS (acrylic tolyl butadiene styrene) and PP (polypropylene); metals such as stainless steel, brass, aluminum, iron, and copper.

  The cross-sectional shape of the outer shape of the rod-shaped member 20 substantially matches the cross-sectional shape of the outer shell of the cylindrical member 10, but has a clearance of, for example, 0 to 300 μm between the inner wall 12 of the cylindrical member 10. It is preferable that the dimensions are set as described above. The rod-shaped member 20 may be formed solid, or may be formed hollow like a cylinder. The length of the rod-shaped member 20 may be longer or shorter than the cylindrical member 10, and may be the same, for example, 5 to 500 mm.

  The shape of the outer peripheral groove 21 formed in the rod-shaped member 20 is not particularly limited, and examples thereof include a V-shaped groove shape, a U-shaped groove shape, a semicircular groove shape, and a U-shaped groove shape. In the case of a V-shaped groove shape, the V-shaped angle is preferably 60 to 90 °. The outer peripheral groove 21 preferably has a uniform groove width and groove depth, but a liquid reservoir may be formed in the middle. The groove width and groove depth of the outer peripheral groove 21 are not particularly limited, and for example, the groove width is 0.1 to 10 mm and the groove depth is 0.05 to 10 mm.

  The outer peripheral groove 21 is not particularly limited as long as it continuously extends in the length direction. For example, the outer groove 21 extends in a spiral shape on the outer peripheral surface of the rod-shaped member 20 continuously in the length direction. Examples thereof include a groove that extends straight along the direction and extends straight on the outer peripheral surface of the rod-shaped member 20. In the case of the former groove extending in a spiral shape, as shown in FIG. 4 (a), it may be a close pitch spiral in which the outer circumferential groove 21 is continuous in the longitudinal direction like a screw groove in the longitudinal section, Moreover, as shown in FIG.4 (b), the spiral of the rough pitch by which the outer periphery groove | channel 21 is arrange | positioned at intervals in the length direction in a longitudinal cross section may be sufficient. The outer peripheral groove 21 extending in a spiral shape on the outer peripheral surface of the rod-shaped member 20 may be arranged so that a plurality of the outer peripheral grooves 21 extend in parallel, for example, like a double helix. In the case of the latter groove extending straight, as shown in FIGS. 5A to 5C, the linear outer circumferential groove 21 extending along the length direction has a predetermined angular interval (for example, 90 °) in the circumferential direction. In this case, as shown in FIG. 5B, the through holes 11 for injecting the adhesive corresponding to the respective outer peripheral grooves 21 are formed in the tubular member 10, The outer peripheral groove 21 may be filled and filled with the adhesive 30. Also, as shown in FIG. 5C, the cross-sectional shape of the hollow portion of the cylindrical member 10 and the cross-sectional shape of the outer shape of the rod-shaped member 20 If the shape is circular, the adhesive 30 is sequentially injected and filled from the single adhesive injection through hole 11 into each outer peripheral groove 21 while rotating the rod member 20 with respect to the cylindrical member 10. Also good.

  The end of the outer peripheral groove 21 on the distal end side of the rod-shaped member 20 may reach the distal end of the rod-shaped member 20 or may not reach the distal end of the rod-shaped member 20. In the former case, the adhesive 30 may flow out of the end of the outer circumferential groove 21 and adhere to the tip surface of the rod-shaped member 20, but in the latter case, the adhesive 30 does not reach the tip of the rod-shaped member 20. The adhesive 30 does not adhere to the tip surface of the rod-shaped member 20. From the viewpoint of preventing the adhesive 30 from leaking to the outside of the tubular member 10, it is preferable that neither end of the outer peripheral groove 21 of the rod-shaped member 20 is exposed to the outside of the tubular member 10.

  The through hole 11 for injecting the adhesive in the tubular member 10 and the outer peripheral groove 21 of the rod-like member 20 are, for example, a groove in which the diameter of the through hole 11 for injecting the adhesive is the outer peripheral groove 21 as shown in FIG. The adhesive 30 is applied to only one portion of the outer peripheral groove 21 from the through hole 11 for injecting the adhesive, as in the case where only one portion of the outer peripheral groove 21 is exposed in the through hole 11 for injecting the adhesive and having a width less than the width. It is preferably configured to be injected. For example, as shown in FIG. 6B, when two or more locations of the outer peripheral groove 21 are exposed in the through hole 11 for injecting the adhesive, the portion into which the adhesive 30 flows into the outer peripheral groove 21 from both sides. May occur, and the adhesive 30 may involve air bubbles in that portion. However, if the adhesive 30 is configured so as to be injected only into one portion of the outer peripheral groove 21 from the through hole 11 for injecting the adhesive, a portion from which the adhesive 30 flows in from both sides does not occur. In this way, entrainment of bubbles in the adhesive 30 can be avoided.

  The means for injecting the adhesive 30 from the through hole 11 for injecting the adhesive is not particularly limited. For example, the dispenser needle 40 of the through hole 11 for injecting the adhesive is inserted to inject the adhesive 30. Means are mentioned.

  The adhesive 30 is not particularly limited, and examples thereof include thermosetting resin adhesives such as epoxy resins and phenol resins, and thermoplastic resin adhesives. Various functional fillers such as conductivity imparting may be mixed in the adhesive 30. The viscosity of the adhesive 30 is, for example, 1 to 150 Pa · s.

  After the injection and filling of the adhesive 30, the adhesive 30 may be cured as it is, and if the cross-sectional shape of the hollow part outline of the cylindrical member 10 and the cross-sectional shape of the external shape of the rod-shaped member 20 are circular, Alternatively, the rod-shaped member 20 may be rotated with respect to the tubular member 10 to adhere the adhesive 30 to the entire inner wall 12 of the tubular member 10 and then be cured.

  As described above, the rod-shaped member 20 is fitted into the cylindrical member 10, and the through-hole 11 penetrating from the outer peripheral surface to the inside is formed in the tubular member 10, and the rod-shaped member 20 is fitted. An outer peripheral groove 21 extending continuously in the length direction is formed on the outer peripheral surface of the portion, and an adhesive 30 filled in a region between the inner wall 12 of the tubular member 10 and the outer peripheral groove 21 of the rod-shaped member 20 is formed. Thus, the fitting structure 100 in which the rod-like member 20 is bonded to the tubular member 10 can be manufactured. In the fitting structure 100, the entire rod-shaped member 20 may be fitted into the tubular member 10, or a part of the rod-shaped member 20 is fitted and the remaining portion protrudes from the tubular member 10. May be.

  Specifically, the manufacturing method of the fitting structure 100 according to the above-described embodiment can be applied to, for example, a fiber scope 70 as shown in FIG.

  In the fiberscope 70 shown in FIG. 7, the eyepiece 71 and the objective 72 are connected by a first flexible tube 73, and the first flexible tube 73 is connected to the objective 72 from the eyepiece 71. An image guide optical fiber (for example, a 10,000-core multi-core fused core optical fiber for image transmission, not shown) is inserted so as to extend. A second flexible tube 74 extends from the eyepiece 71, and a light guide plug 75 is attached to the tip thereof. The first and second flexible tubes 73 and 74 are in contact with the light guide plug 75. Light guide optical fibers (for example, thousands of optical fiber bundles for transmitting illumination light, not shown) are inserted so as to extend to the objective 72 through the eye 71. In the objective 72, a cylindrical fiber holding fitting 78 (rod-like shape) holding the ends of the image guide optical fiber and the light guide optical fiber on a cylindrical outer fitting 77 (cylindrical member) having a lens 76 attached to the tip. Member) is fitted to the middle part. The exterior fitting 77 has a through hole 77a for injecting an adhesive penetrating from the outer peripheral surface to the inside and a through hole 77b for confirming the arrival of the adhesive, and has a length on the outer peripheral surface of the fiber holding metal 78. An outer peripheral groove 78a extending spirally continuously in the direction is formed, and after aligning and fitting so that the through holes 77a and 77b of the outer metal fitting 77 communicate with the outer peripheral groove 78a of the fiber holding metal fitting 78, Adhesive 79 is injected from the through-hole 77a of the outer metal fitting 77 until the adhesive 79 is visible from the through-hole 77b, and thereby, into the region between the inner wall 77c of the outer metal fitting 77 and the outer peripheral groove 78a of the fiber holding metal 78. By filling the adhesive 78, both are bonded.

  Moreover, the manufacturing method of the fitting structure 100 which concerns on this embodiment can also be applied to the fiber bundle 80 as shown in FIG.

  In the fiber bundle 80 shown in FIG. 8, the connection portions 81 at both ends are connected by a flexible tube 82, and an optical fiber extends from the one connection portion 81 to the other connection portion 81. A bundle (for example, several tens of optical fiber bundles for visible light spectroscopic analysis, not shown) is inserted. In each connection portion 81, a cylindrical bundle holding fitting 84 (bar-like member) that holds the end portion of the optical fiber bundle is fitted into the cylindrical outer fitting 83 (tubular member) to the end. The exterior fitting 83 is formed with a through hole 83a for injecting an adhesive penetrating from the outer peripheral surface to the inside and a through hole 83b for confirming the arrival of the adhesive, and has a length on the outer peripheral surface of the bundle holding metal fitting 84. An outer peripheral groove 84a extending continuously in the direction is formed, and the outer metal fitting 83 is fitted and aligned so that the through holes 83a and 83b of the outer metal fitting 83 communicate with the outer peripheral groove 84a of the bundle holding metal fitting 84. The adhesive 85 is injected from the through-hole 83a until the adhesive 85 is visible from the through-hole 83b, whereby the adhesive 85 is applied to the region between the inner wall 84c of the outer metal fitting 83 and the outer peripheral groove 84a of the fiber holding metal 84. It is comprised so that both may be adhere | attached by filling.

  The present invention is useful for a fitting structure and a manufacturing method thereof.

10 cylindrical members 11, 77a, 83a through holes 12, 77c, 84c for injecting adhesive inner walls 13, 77b, 83b through holes for confirming arrival of adhesive 20 rod-shaped members 21, 78a, 84a outer peripheral groove 30 adhesive 40 dispenser Needle 70 Fiber scope 71 Eyepiece portion 72 Objective portion 73 First flexible tube 74 Second flexible tube 75 Light guide plug 76 Lens 77, 83 Exterior fitting (tubular member)
78 Fiber Retaining Bracket (Bar-shaped member)
79,85 Adhesive 80 Fiber bundle 81 Connection portion 82 Flexible tube 84 Bundle holding bracket (bar-shaped member)
100 mating structure

Claims (4)

A method for manufacturing a fitting structure in which a rod-like member is fitted in a cylindrical member,
A cylindrical member in which a through-hole penetrating from the outer peripheral surface to the inside is formed, a rod-shaped member in which an outer peripheral groove extending continuously in the length direction is formed on the outer peripheral surface, and the through-hole of the cylindrical member is the rod-shaped member After positioning and fitting so as to communicate with the outer peripheral groove of the cylindrical member, an adhesive is injected from the through-hole of the cylindrical member, and the region between the inner wall of the cylindrical member and the outer peripheral groove of the rod-shaped member is injected. A method for manufacturing a fitting structure filled with an adhesive. In the manufacturing method of the fitting structure described in Claim 1,
In the cylindrical member, another through hole penetrating from the outer peripheral surface to the inside is formed at a position spaced in the length direction from the through hole,
When the rod-shaped member is fitted into the cylindrical member, the other through-hole of the tubular member is aligned so as to communicate with the outer peripheral groove of the rod-shaped member,
The manufacturing method of the fitting structure which performs injection | pouring of the adhesive agent from the through-hole of the said cylindrical member until an adhesive agent is visually recognized from another through-hole of this cylindrical member. In the manufacturing method of the fitting structure described in Claim 1 or 2,
A manufacturing method of a fitting structure in which, when the rod-shaped member is fitted in the cylindrical member, only one portion of the outer peripheral groove of the rod-shaped member is exposed in the through hole of the cylindrical member. A fitting structure in which a rod-like member is fitted in a cylindrical member,
A through-hole penetrating from the outer peripheral surface to the inside is formed in the cylindrical member, and an outer peripheral groove extending continuously in the length direction is formed on the outer peripheral surface of the fitting portion of the rod-shaped member,
A fitting structure in which the rod-shaped member is bonded to the tubular member via an adhesive filled in a region between the inner wall of the tubular member and the outer peripheral groove of the rod-shaped member.

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