JP2012247031A6 - Assembly coupler - Google Patents

Abstract

A fastener is easily detached from a graphite jig fixing pin.
The graphite jigs 2 and 3 are fixed by a connecting tool 150. The connector 150 includes a graphite jig fixing pin 100 and a non-circular E-shaped ring 10. An annular groove is formed along the peripheral surface of the shaft 101 of the graphite jig fixing pin 100. The shaft 101 of the graphite jig fixing pin 100 is inserted into the holes 2b and 3a, and the E-shaped ring 10 is engaged with the groove formed in the shaft 101 of the graphite jig fixing pin 100 in the recess 2a. The E-shaped ring 10 is detached from the graphite jig fixing pin 100 by applying a force to the tip of the graphite jig fixing pin 100.
[Selection] Figure 2

Description

  The present invention relates to an assembly connector used for positioning electronic components and assembling electronic components.

  When an electronic component is mounted on a circuit board, the electronic component is positioned and the electronic component is assembled using a jig. When using a plurality of jigs in a stacked manner, the jigs are fixed to each other using a connector or the like. As a fixing method using a connector or the like, a method is known in which a fixing pin is inserted into a through-hole of a jig and the tip of the fixing pin is fixed with a stopper. Stoppers that are inserted from a direction perpendicular to the shaft portion (longitudinal direction) of the fixing pin (hereinafter referred to as radial direction), for example, non-annular such as E-type retaining ring, K-shaped retaining ring, U-shaped retaining ring Or a non-annular stopper such as a C-shaped retaining ring or a round S-shaped retaining ring inserted from a horizontal direction (hereinafter referred to as a thrust direction) with respect to the shaft portion (longitudinal direction) of the fixing pin. Used. The non-annular stopper inserted in the radial direction with respect to the fixing pin is attached to and detached from the pin by sliding the fixing pin. The non-annular stopper that is inserted into the fixing pin from the thrust direction has a small hole, and a special tool such as a snap ring plier is inserted into the small hole, and the stopper is expanded and removed. . The push nut disclosed in Patent Document 1 can also be used as a stopper. By moving the push nut in the thrust direction and fitting it to the fixing pin without using a dedicated tool, it becomes possible to connect the connector more firmly than the non-annular stopper. However, the push nut fitted to the fixing pin is deformed from the original shape and cannot be reused. In addition, since the connection between the push nut and the fixing pin is strong, when releasing the connection, the push nut cannot be easily removed from the fixing pin. There is a possibility of destroying the push nut.

  In recent years, a jig having a concave portion formed on a predetermined surface is used as a graphite jig, and frequent attachment / detachment of a fixture is required for jig replacement. When a plurality of jigs are fixed using the jig, a stopper can be attached to the fixing pin in the recess, so that the tip of the fixing pin does not protrude from the upper surface of the jig. it can. At this time, when using a non-annular stopper that is inserted from the radial direction with respect to the fixing pin, such as an E-shaped retaining ring, a K-shaped retaining ring, or a U-shaped retaining ring, It is desirable that a sufficient space for sliding the stopper in the direction is secured. However, in order to secure the space, a large recess has to be formed in the jig with respect to the fixing pin, so the number of recesses that can be formed in the jig is reduced. As a result, when the jig is fixed, the degree of freedom for selecting the recess according to the combination of the jig is limited. Moreover, the operation | work which removes from a fixing pin by sliding a non-annular stop tool in a radical direction within the fine recessed part formed in the jig requires a big burden for an operator. Furthermore, as a method of removing the stopper from the pin without sliding it, the stopper can be deformed and fixed by applying force to the stopper using pliers or by pushing the tip of the fixing pin. A method of removing from a pin is known. However, according to this method, since the stopper is deformed from the original shape, the stopper once used cannot be used again. In addition, when the material of the stopper is stainless steel, even if the thickness of the stopper is about 0.25 (mm), the load until the stopper or the shaft is damaged or the stopper is removed (hereinafter referred to as allowable thrust load). Generally exceeds 100 (N). For this reason, it is difficult to deform the stopper by this method.

  In order to solve such a problem, Patent Document 2 discloses a stopper (a retaining ring) using a shape memory alloy. Since the shape memory alloy is deformed by heat, when the heat is applied to the retaining ring, the retaining ring thermally expands and its diameter increases. Thereby, the retaining ring can be easily removed from the connecting pin (fixing pin) in the axial direction.

  Patent Document 3 discloses a press-fitting device for attaching a stopper to a stud (fixing pin). According to this press-fitting device, the stopper is press-fitted in the axial direction of the pin while expanding the opening of the stopper, and attached to the stud (fixing pin).

Japanese Patent Laid-Open No. 06-37482 JP 2009-68585 A Japanese Utility Model Publication No. 54-44320

  However, the retaining ring disclosed in Patent Document 2 is limited to a shape memory alloy, and a heating operation is required when the retaining ring is removed from the connecting pin (fixing pin). Further, the attaching / detaching operation of the retaining ring is limited to a certain time during which the retaining ring is thermally expanded. Furthermore, although the press-fitting device disclosed in Patent Document 3 can be attached to the stud (fixing pin) by moving the stopper in the radical direction with respect to the stud (fixing pin), the press-fitting device is provided in the jig. In order to perform the operation in the recessed portion, it is necessary to have a space in the recessed portion enough to insert the elongated hollow outer cylinder of the dedicated tool. As a result, the concave portion becomes large, and the absolute amount of the concave portion that can be formed in the jig is reduced. Moreover, it is not suitable for the operation | work which removes from a stud (fixing pin) by moving the stopper once mounted to a thrust direction with respect to a stud (fixing pin).

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an assembly connector capable of easily attaching and detaching a stopper for retaining with respect to a graphite jig fixing pin in a recess formed on a predetermined surface of the graphite jig. It is to be.

  The assembly connector of the present invention includes a recess formed on a predetermined surface, a first jig having a first through hole in a part of the bottom surface of the recess, a second jig having a second through hole, An assembly coupling tool comprising a first jig and a coupling tool for fixing the second jig to each other, wherein the coupling tool includes a jig fixing pin inserted through the first through hole and the second through hole. And a stopper that engages with the jig fixing pin in the recess, and the jig fixing pin has an insertion shaft and a diameter of the second through hole at a proximal end of the insertion shaft. An annular groove is formed along the peripheral surface of the insertion shaft, and the stopper is engaged with the groove without completely surrounding the groove in the circumferential direction. It is an annular member, the stopper is made of a metal material, and the allowable thrust load of the stopper is 70 (N). It is above 500 (N) or less. Here, “allowable thrust load” means that when the stopper is engaged with the jig fixing pin, the stopper is damaged when force is applied to the stopper from the thrust direction (axial direction). , Indicates the force (load) that does not come off the jig fixing pin.

  According to the present invention, since the stopper is a non-annular member that is engaged without completely surrounding the groove of the jig fixing pin in the circumferential direction, the allowable thrust load of the stopper is, for example, 70 (N) or more and 500. (N) Even if it is the following, when pressing the jig fixing pin or stopper in order to remove the stopper in the thrust direction of the graphite jig fixing pin, without applying a large stress to the stopper, The diameter can be expanded. Therefore, the stopper can be easily attached to and detached from the jig fixing pin by moving the stopper in the thrust direction with respect to the jig fixing pin. Thereby, workability | operativity can be improved. Moreover, even if the diameter of the stopper is expanded, the stopper can be re-used after use because the stopper is not easily deformed greatly.

Moreover, the assembly coupling tool of this invention WHEREIN: It is preferable that the said jig | tool fixing pin and the said stopper satisfy | fill following (1) Formula.
Ly + Lz + Lt ≦ Lp <Lx + Ly + Lz + Lt (1)
here,
Lp: length from the proximal end of the insertion shaft to one end of the groove located on the distal end side of the insertion shaft in the longitudinal direction of the insertion shaft Lx: length in the depth direction of the recess Ly: the first penetration Length in the depth direction of the hole Lz: Length in the depth direction of the second through hole Lt: Thickness of the stopper Here, “depth of the recess” is the height direction (depth direction) of the recess Is the distance from the opening of the recess to the bottom of the recess.

  With the above configuration, the stopper can be easily detached from the jig fixing pin by moving the stopper in the thrust direction with respect to the jig fixing pin in the recess of the first jig.

  Moreover, the assembly coupling tool of this invention WHEREIN: It is preferable that the groove | channel along the surrounding surface of the said insertion axis is 0.05 mm or more and less than 0.3 mm. Here, the “groove depth” indicates a distance obtained by equally dividing the difference between the maximum outer diameter of the insertion shaft and the minimum outer diameter of the groove portion in the radial direction of the insertion shaft.

  When the depth of the groove is 0.05 mm or more, the stopper can be securely attached to the groove of the insertion shaft of the jig fixing pin. Further, when the depth of the groove is less than 0.3 mm, the stopper can be easily attached and detached from the jig fixing pin.

  Furthermore, in the assembly connector of the present invention, it is preferable that the inner diameter of the stopper is smaller than the diameter of the insertion shaft and belongs to a range of a value obtained by subtracting 0.1 mm from the diameter of the groove.

  With the above configuration, it is possible to avoid mounting the stopper in a state where the diameter is greatly expanded so as to project outward with respect to the groove of the insertion shaft of the jig fixing pin. Further, since there is not much gap between the inner peripheral surface of the stopper and the peripheral surface of the groove of the insertion shaft, the diameter of the stopper does not increase in one direction with respect to the radial direction of the insertion shaft of the jig fixing pin. Therefore, when pressing the graphite jig fixing pin and stopper, the inner diameter of the jig fixing pin can be expanded to the extent that the inner diameter of the jig fixing pin is equivalent to the outer diameter of the insertion shaft efficiently and uniformly. The stopper can be easily detached from the jig fixing pin.

  In addition, in the assembly connector of the present invention, it is preferable that the insertion shaft has a tapered shape that tapers toward the tip.

  Since the insertion shaft has a tapered shape that tapers toward the tip, the stopper closely contacts the inclined insertion shaft substantially equally. Therefore, stress can be uniformly applied to the entire stopper. Thereby, a stopper can be easily attached to a graphite jig fixing pin.

  According to the assembly connector of the present invention, even when there is no space for sliding the stopper in the recess formed in the graphite jig, the stopper can be easily removed from the graphite jig fixing pin in the recess. Can do.

It is an external view of the assembly coupling tool which concerns on this embodiment. It is an enlarged view of the groove | channel formed in the graphite jig | tool shown in FIG. 1, (a) is a top view, (b) is IIB-IIB sectional drawing in (a). It is the schematic of the pin for graphite jig fixing shown in FIG. 2, (a) is a perspective view, (b) is the schematic which shows the front-end | tip periphery of the pin for graphite jig fixing. FIG. 3 is a plan view of the stopper shown in FIG. 2. (A) is VV sectional drawing in Fig.2 (a). (B) is sectional drawing of the assembly coupling tool which concerns on a reference example. (A) And (b) is a perspective view of the pin for graphite jig fixation used in a modification. It is a top view of the fastener used in a modification.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

<First embodiment>
Here, 1st Embodiment of the coupling tool which concerns on this invention, and the pin for graphite jig fixing is described using FIGS. 1 and 2 show a state in which the graphite jig is fixed by a connector, and FIG. 2 is an enlarged view of the groove in FIG.

(Assembly connector 1)
As shown in FIG. 1, the assembly connector 1 includes a graphite jig (first jig) 2, a plurality of graphite jigs (second jigs) 3 attached to the lower surface of the graphite jig 2, and graphite. And a connector 150 for fixing the jigs 2 and 3. As shown in FIGS. 2A and 2B, the connector 150 includes a graphite jig fixing pin (jig fixing pin) 100 and an E-shaped ring (stopper) 10. As shown in FIGS. 1 and 2, the graphite jig 2 is a single plate-like jig having a plurality of recesses 2 a formed on the upper surface. The plurality of recesses 2a have substantially the same shape, and are arranged in a substantially lattice shape with a predetermined interval therebetween. Moreover, as shown to Fig.2 (a), the cross section seen from the upper part of the recessed part 2a is formed in the substantially circular shape. The graphite jig 3 is a flat jig smaller than the graphite jig 2. As shown in FIG. 2B, the graphite jig 3 is disposed below the recess 2 a of the graphite jig 2. Further, the graphite jig 3 is fixed to the lower surface of the graphite jig 2 by a connector 150.

  As shown in FIG. 2B, the graphite jig 2 includes a recess 2a and a depth direction of the recess 2a from the part of the bottom surface of the recess 2a to the lower surface of the graphite jig 2 (thickness direction of the graphite jig 2). ) (A first through hole) 2b is formed. The outer diameter of the hole 2b is smaller than the outer diameter (width) of the recess 2a, and a stepped through hole penetrating in the thickness direction is formed in the graphite jig 2 by the recess 2a and the hole 2b. Further, the graphite jig 3 is formed with a hole (second through hole) 3a penetrating in the thickness direction. The hole 3a is a hole having substantially the same outer diameter as the hole 2b. The graphite jig 3 is disposed below the graphite jig 2 so that the holes 2b and 3a communicate with each other.

  As shown in FIG. 2A, in the present embodiment, the recess 2 a is formed in a circular shape whose cross section when viewed from above is slightly larger than the outer periphery of the E-shaped ring 10. When the E-shaped ring 10 is disposed in the recess 2a, there is almost no gap between the inner surface of the recess 2a and the outer surface of the E-shaped ring 10 in the recess 2a. Therefore, the E-shaped ring 10 can hardly be moved in the sliding direction (the width direction of the recess 2a).

  The holes 2b and 3a are formed to have an outer diameter slightly larger than the outer diameter of the shaft 101 of the graphite jig fixing pin 100 described later. Further, the outer diameters of the holes 2 b and 3 a are smaller than the outer diameter of the head 102 of the graphite jig fixing pin 100 and smaller than the outer diameter of the E-shaped ring 10. In the present embodiment, the holes 2b and 3a have substantially the same outer diameter, but the outer diameters of the holes 2b and 3a may be different from each other.

  The graphite jigs 2 and 3 contain graphite and are not easily affected by changes in the environment (temperature, etc.). The shape of the graphite jigs 2 and 3 is not limited to the shape shown in FIG. 1 and may be formed in different shapes.

(Connector 150)
As described above, the coupler 150 has the graphite jig fixing pin 100 and the E-shaped ring 10. As shown in FIG. 2 (b), the E-shaped ring 10 is attached to the graphite jig fixing pin 100 in the recess 2 a formed in the graphite jig 2. Thereby, the graphite jigs 2 and 3 are fixed to each other from above and below by the connector 150.

(Graphite jig fixing pin 100)
As shown in FIG. 3A, the graphite jig fixing pin 100 includes a shaft (insertion shaft) 101 extending in the vertical direction, and a disk-shaped head portion 102 provided at the base end of the shaft 101. Have The head portion 102 is a disk having an outer diameter larger than the outer diameter of the shaft 101, and holds the graphite jigs 2 and 3 from the graphite jig 3 side (downward) (FIG. 2B). The shaft 101 and the head 102 are joined so that their centers coincide. Each center may be shifted according to the specification and the like, and it is not always necessary to match. The shaft 101 has a cylindrical first region 101a positioned on the proximal end side of the graphite jig fixing pin 100, and a tapered first region 101a positioned closer to the distal end side of the graphite jig fixing pin 100 than the first region 101a. 2 regions 101b.

  In the present embodiment, the first region 101a is a region having a length of about three quarters from the proximal end to the distal end in the longitudinal direction of the shaft 101, and the second region 101b is the remaining region, That is, it is a region having a length of about a quarter from the distal end to the proximal end in the longitudinal direction of the shaft 101. The second region 101b tapers toward the tip of the shaft 101, and the first region 101a and the second region 101b are continuously connected in outer diameter.

  An annular groove 110 is formed along the outer peripheral surface on the side surface of the first region 101a on the front end side (second region 101b side). As shown in FIGS. 3A and 3B, the groove 110 has a substantially U-shaped cross section in the longitudinal direction of the shaft 101. The width of the groove 110 (width in the longitudinal direction of the shaft 101 (distance B shown in FIG. 3B)) is slightly larger than the thickness of the E-shaped ring 10 (Lt shown in FIG. 5A). Further, the depth of the groove 110 (the depth in the radial direction of the shaft 101 (distance A shown in FIG. 3B)) is 0.05 mm or more and less than 0.3 mm. The outer diameter of the bottom 110c of the groove 110 is the same as the hole diameter of the E-shaped ring 10 or slightly larger than the hole diameter of the E-shaped ring 10. Here, the hole diameter is an inner diameter of a hole formed near the center of the E-shaped ring 10. Specifically, it is the diameter d of the largest circle in contact with the three protrusions (locking portions) 12 shown in FIG. When the E-shaped ring 10 is fitted in the groove 110 having such a shape, the E-shaped ring 10 is in a state where the hole diameter is not changed (the E-shaped ring 10 is not expanded or contracted in the circumferential direction). Or it engages with the groove | channel 110 in the state (The state where the E-shaped ring 10 expanded the diameter slightly in the circumferential direction) in which the hole diameter became slightly large.

  Next, the relationship between the E-shaped ring 10 and the graphite jigs 2 and 3 will be described with reference to FIG. FIG. 5A shows an assembly connector according to this embodiment, and FIG. 5B shows an assembly connector according to a reference example.

As shown in FIG. 5A, the shaft 101 of the graphite jig fixing pin 100 according to the present embodiment has the following expression in relation to the E-shaped ring 10 and the graphite jigs 2 and 3. .
Ly + Lz + Lt ≦ Lp <Lx + Ly + Lz + Lt
here,
Lp: length from the base end of the shaft 101 to the upper end of the groove 110 (one end of the groove 110 located on the front end side of the shaft 101 (the edge 110a on the upper surface)) in the longitudinal direction of the shaft 101 Lx: depth of the recess 2a Length in the direction Ly: Length in the longitudinal direction (depth direction) of the hole (first through hole) 2b Lz: Length in the longitudinal direction (depth direction) of the hole (second through hole) 3a Lt: E type This is the thickness of the ring 10.
When the graphite jig 3 is fixed to the graphite jig 2 by using the graphite jig fixing pin 100 having the length of the shaft 101, the E-shaped ring 10 is engaged with the groove 110 in the recess 2a. .

  Next, a reference example will be described with reference to FIG. A graphite jig fixing pin 600 shown in FIG. 5B has a shaft 601 and a head 602 provided at the base end of the shaft 601. The tip portion of the shaft 601 is formed in a tapered shape that tapers toward the tip, similarly to the shaft 101. Further, a groove 610 similar to that of the shaft 101 is formed in the shaft 601. As shown in FIG. 5B, when Lp ≧ Lx + Ly + Lz + Lt (when Lp = Lx + Ly + Lz + Lt + Lc), the E-shaped ring 10 is mounted on the graphite jig fixing pin 600 outside the recess 2a. 10 can be removed from the graphite jig fixing pin 600 by sliding. Although not shown, when Lp <Ly + Lz + Lt, part or all of the groove 110 is positioned below the recess 2a, and therefore the E-ring 10 cannot be completely engaged with the groove 110 in the recess 2a. . When the E-shaped ring 10 does not completely engage with the groove 110, there arises a problem that it is detached from the groove 110 due to an unintended impact.

  When the graphite jigs 2 and 3 are fixed by the connecting tool 150, the distance Lb from the bottom surface of the recess 2a to the bottom surface of the E-shaped ring 10 in the longitudinal direction of the graphite jig fixing pin 100 is less than about 0.3 mm. It is preferable that When the distance Lb is 0.3 mm or more, the play generated between the head 102 and the E-shaped ring 10 becomes large, and the graphite jig 2 and the graphite jig 3 are fixed when the graphite jig 2 and the graphite jig 3 are fixed by the connector 150. There is a possibility that the adhesion between the graphite jig 3 and the graphite jig 3 cannot be maintained.

  Furthermore, by setting the depth of the groove 110 (distance A shown in FIG. 3B) to 0.05 mm or more and less than 0.3 mm, the E-shaped ring 10 engaged with the groove 110 in the recess 2a is used. By pressing the tip of the graphite jig fixing pin 100 with a tool moved by human force (approximately 47N or more and 57N or less), the diameter of the E-shaped ring (stopper) is expanded in the circumferential direction and can be easily detached. can do. That is, by setting the depth of the groove 110, the E-shaped ring 10 can be easily removed from the groove 110 by applying a human force using a tool. When the depth of the groove 110 is 0.3 mm or more, the groove 110 is deep, so that the E-shaped ring 10 is firmly engaged with the groove 110, but the E-shaped ring is pressed by a tool moved by human power. Since the diameter of the (stopper) may not be increased in the circumferential direction to such an extent that it can be removed from the graphite jig fixing pin, when removing the E-ring 10 from the graphite jig fixing pin 100, a tool such as pliers is used. It is necessary to deform the E-ring 10 by using it. Therefore, the E-shaped ring 10 cannot be easily removed from the graphite jig fixing pin 100. Further, since the E-shaped ring 10 is deformed from its original shape, it cannot be reused. On the other hand, when the depth of the groove 110 is less than 0.05 mm, since the groove 110 is shallow, even if the E-shaped ring 10 is engaged with the groove 110, the E-shaped ring 10 is easily detached from the groove 110. Therefore, the graphite jigs 2 and 3 cannot be firmly fixed, and the E-shaped ring 10 may come off from the graphite jig fixing pin 100 during the assembly operation of the electronic component. The depth (distance A) of the groove 110 is more preferably 0.05 mm or more and less than 0.15 mm. When the depth of the groove 110 is less than 0.15 mm, the graphite jigs 2 and 3 can be securely fixed, and to the graphite jig fixing pin 100 of the E-shaped ring 10 with a smaller force. Can be attached and detached. Therefore, work efficiency can be improved when the E-shaped ring 10 is frequently attached to and detached from the graphite jig fixing pin 100.

  Here, the “depth of the groove 110” in the present embodiment is a distance A from the opening of the groove 110 to the bottom 110c in the radial direction of the shaft 101 (FIG. 3B). In this embodiment, the edge 110a shown in FIG. 3B has the maximum outer diameter of the shaft 101 (the same outer diameter as the outer diameter of the first region 101a and the maximum outer diameter of the second region 101b). Yes. Here, the edge 110 a is an edge of the groove 110 located on the tip side of the shaft 101 (an edge 110 a on the upper surface of the groove 110). Note that there is no region having an outer diameter larger than the outer diameter of the edge 110a in the region on the tip side of the groove 110 of the shaft 101. When a region having an outer diameter larger than the edge 110a exists on the tip side of the groove 110 of the shaft 101, the E-shaped ring 10 is broken or deformed in order to remove the E-shaped ring 10 from the graphite jig fixing pin 100. It is necessary to do. Further, the “bottommost portion 110 c” in the present embodiment is a position closest to the center of the shaft 101 in the bottom surface of the groove 110.

  The groove 110 in the present embodiment has a substantially U-shaped cross section in the depth direction (cross section in the longitudinal direction of the shaft 101), but the cross section of the groove 110 is limited to a U shape. Absent. For example, the groove 110 may be formed in a groove having a substantially U-shaped cross section with a rounded bottom, or a groove having a V-shaped cross section in which the width of the groove increases from the bottom to the depth direction of the groove. Good.

  Further, the position where the groove 110 is formed is not limited to the front end side of the first region 101a as shown in FIG. 3A, and can be appropriately changed according to the thickness of the graphite jigs 2 and 3 and the like. For example, the groove 110 may be formed closer to the base end side of the shaft 101 than shown in FIG. 3A, or the groove 110 may be formed closer to the tip side of the shaft 101 than shown in FIG. The opening (edge 110a) of the groove 110 and the second region 101b may be continuous.

  The graphite jig fixing pin 100 is made of iron, steel, stainless steel (SUS), or the like. The shaft 101 is not limited to the shape shown in FIGS. 2 and 3. For example, the outer diameter of the first region 101 a is about 1.6 mm to 5 mm and the length of the first region 101 a in the longitudinal direction is about 3. An axis that is 0-30.0 mm can be used. In addition, the ratio regarding the longitudinal direction of the 1st area | region 101a and the 2nd area | region 101b is not restricted to the ratio of 3: 1 shown to Fig.3 (a). For example, the length of the first region 101 a in the longitudinal direction may be shortened, or the second region 101 b may be further extended in the longitudinal direction of the shaft 101. Further, the taper shape of the second region 101b may be a taper shape having a gentler slope than the shape shown in FIG. 3A, or may have a sharper taper shape than the shape shown in FIG. The graphite jig fixing pin 100 is not limited to the above-described materials and shapes, and other materials or different shapes of graphite jig fixing pins may be used. The shape of the head 102, the length of the shaft 101, the diameter of the shaft 101, etc. are the shape of the graphite jigs 2 and 3, the length in the longitudinal direction of the holes 2b and 3a, and the depth (height) of the recess 2a. It can be changed appropriately according to the above.

(E-shaped ring 10)
As shown in FIG. 4, the non-annular E-shaped ring 10 is made of a stainless steel material, and has a substantially C-shaped support portion 11, and three protrusions (locking portions) 12 formed on the inner surface of the support portion 11. Have In the vicinity of the center of the E-shaped ring 10, a hole surrounded by three protrusions (locking portions) 12 is formed, and the shaft 101 is inserted into the hole. A gap 10a communicating with the hole exists between both ends of the support portion 11, and the E-shaped ring 10 expands or contracts in the circumferential direction of the hole by the gap 10a, and the diameter of the hole changes. The three protrusions (locking portions) 12 are formed at both ends and near the center of the support portion 11 by forming two recesses in the inner portion of the support portion 11.

In this embodiment, for example, an E-shaped ring (JIS B 2805 1.5 (E-shaped ring having hardness of HRC44-53 and made of spring stainless steel) having the following diameter can be used. The symbols (d, D, H) shown below are the symbols shown in FIG.
d: 1.5cm
D: 4.0cm
H: 1.3cm
E-shaped ring thickness: 0.4cm
Further, a pin having an axis having an outer diameter of 1.53 cm can be applied to the E-shaped ring 10.

  When the E-shaped ring 10 is attached to the graphite jig fixing pin 100, as shown in FIG. 2A, three protrusions (locking portions) hold the shaft 101 therebetween. At this time, the E-shaped ring 10 does not surround the entire circumferential surface of the groove 110 in the circumferential direction.

  Moreover, the hole diameter (inner diameter (d shown in FIG. 4)) of the E-shaped ring 10 shown in FIG. 4 is smaller than the diameter of the portion of the shaft 101 of the graphite jig fixing pin 100 where the groove 110 is not formed, and , And belongs to a range equal to or larger than a value obtained by subtracting 0.1 mm from the diameter of the portion of the shaft 101 where the groove 110 is formed. Further, the depth of the groove 110 (distance A shown in FIG. 3B) of the graphite jig fixing pin 100 to which the E-shaped ring 10 is attached is 0.05 mm or more and less than 0.3 mm. . Thereby, the clearance gap between the internal peripheral surface of the protrusion 12 of the E-shaped ring 10, and the part in which the groove | channel 110 of the axis | shaft 101 was formed does not arise too much. Therefore, the E-shaped ring 10 is not biased in one direction with respect to the radial direction of the shaft 101 of the graphite jig fixing pin 100. Therefore, when pressing the graphite jig fixing pin 100 or the E-shaped ring 10, the E-shaped ring 10 can be pressed so that an average stress is applied to the entire E-shaped ring 10. It is possible to prevent stress from concentrating on a part of the surface.

  The gap 10a is not limited to the size of the gap 10a shown in FIG. For example, both ends of the support portion 11 may be further extended in the circumferential direction, and the gap 10a may be a slight gap. Thus, it is preferable that the stopper (E-shaped ring 10) which comprises the connection tool 150 is a non-annular stopper. When an annular stopper is used as the stopper, the groove 110 is surrounded in the circumferential direction, but the outer diameter (hole diameter) of the stopper is not limited even if an external force is applied to the stopper when it is attached to the graphite jig fixing pin. Since it hardly changes, it is necessary to deform the stopper in the same manner as the push nut when the stopper is removed from the groove 110. On the other hand, in the E-shaped ring 10 of the present application, when a stress due to an external force is applied to the E-shaped ring 10, the gap 10a expands in the circumferential direction of the hole, and the diameter of the E-shaped ring 10 is easily expanded to the extent that the E-shaped ring 10 is not deformed. Therefore, the E-shaped ring 10 can be easily removed from the groove 110 without being deformed. The hole diameter of the E-shaped ring 10 is preferably substantially the same outer diameter as the shaft 101 or an outer diameter slightly smaller than the outer diameter of the shaft 101. The term “deformation” as used herein refers to a state in which the shape does not change temporarily when a force is applied, but does not return to the initial shape after the force is applied. This matter may be appropriately determined by the practitioner in consideration of the material used for the stopper.

  As shown in FIG. 2B, the E-shaped ring 10 fixes the graphite jigs 2 and 3 from the graphite jig 2 side (upper side). The E-shaped ring 10 may be made of, for example, stainless steel or steel, but the material of the stopper is not limited to these materials. In addition, a stopper that matches the size and shape of the graphite jig fixing pin 100 may be used for the stopper (E-shaped ring 10) constituting the connector 150. For example, a stopper having a hole diameter different in size according to the outer diameter of the shaft 101 and the outer diameter of the groove 110 or a stopper having a support portion having a shape different from the support portion 11 shown in FIG. 4 may be used. Further, the stopper is not limited to the E-shaped ring 10, and a non-annular stopper such as a C-shaped ring described later may be used.

  The E-shaped ring 10 of this embodiment is made of a stainless material and is not easily deformed. And the allowable thrust load of the E-shaped ring 10 is 70 (N) or more and 500 (N) or less. When the allowable thrust load is less than 70 (N), there is a possibility that the E-shaped ring 10 is deformed when an excessive pressure is applied when the E-shaped ring 10 is attached to and detached from the graphite jig fixing pin 100. There is. Further, when the allowable thrust load exceeds 500 (N), it is not appropriate to increase the diameter of the stopper even if a force of about 47 (N) to 57 (N) is applied using a tool. As described above, in this embodiment, the E-shaped ring 10 having a hole having an inner diameter generally used for a stopper and made of a stainless steel material is used. The allowable thrust load of the E-shaped ring 10 is more preferably 100 (N) or more and 300 (N) or less.

(Method of mounting the E-ring 10 to the graphite jig fixing pin 100)
The graphite jigs 2 and 3 are laminated so that the holes 2b and 3a communicate with each other, and the shaft 101 of the graphite jig fixing pin 100 is inserted into the communicating holes 2b and 3a from the graphite jig 3 side. Then, the E-shaped ring 10 is pressed in the thrust direction (longitudinal direction of the shaft 101) from the tip of the shaft 101 disposed on the graphite jig 2 side. Here, the pressing force may be a human force (about 47 (N) or more and 57 (N) or less). In addition, since the operation | work which presses the E-shaped ring 10 is a fine operation | work, it is preferable to use the tool which can press only the E-shaped ring 10. FIG. As a result, the E-shaped ring 10 moves in the thrust direction (longitudinal direction of the shaft 101) and fits into the groove 110 while its hole diameter (d shown in FIG. 4) is slightly increased. When the E-shaped ring 10 is attached to the graphite jig fixing pin 100, the E-shaped ring 10 is in close contact with the second region 101b that is inclined in accordance with the gap 10a, so that an equal force is applied to the E-shaped ring 10. . The E-shaped ring 10 attached to the graphite jig fixing pin 100 does not surround the entire circumferential surface of the groove 110 in the circumferential direction, and the hole diameter is slightly increased (in the circumferential direction of the groove 110 (outside 2) (slightly expanded state) or in a state in which the hole diameter hardly changes (a state in which the hole 110 hardly expands or contracts in the circumferential direction of the groove 110) (FIG. 2A). ), (B)).

(Method for removing E-ring 10 from graphite jig fixing pin 100)
From the state shown in FIGS. 2A and 2B, force is applied to the tip of the graphite jig fixing pin 100 in the thrust direction (longitudinal direction of the shaft 101). At this time, it is preferable to use a cylindrical tool that can press only the graphite jig fixing pin 100, and the pressing force of the cylindrical jig to the graphite jig fixing pin 100 causes the E-ring 10 to be graphite. The force of the person (about 47 (N) or more and 57 (N) or less) applied to the jig fixing pin 100 may be approximately the same. When force is applied to the E-shaped ring 10, the graphite jig fixing pin 100 moves to the proximal end side, and the side wall (upper side surface) of the groove 110 presses the E-shaped ring 10. As a result, the gap 10a of the E-shaped ring 10 expands in the circumferential direction (outside), and the hole diameter (d shown in FIG. 4) of the E-shaped ring 10 is substantially the same as the outer diameter or edge of the edge 110a of the groove 110. It becomes slightly larger than the outer diameter of 110a. Then, the E-shaped ring 10 is detached from the groove 110, and the E-shaped ring 10 moves to the tip side of the graphite jig fixing pin 100.

  As described above, the assembly connector 1 of the present embodiment has the following effects. Since the E-shaped ring 10 is a non-annular member that engages with the graphite jig fixing pin 100 without completely surrounding the groove 110 in the circumferential direction, the allowable thrust load of the stopper is 70 (N) or more and 500 ( N) Even when the graphite jig fixing pin 100 and the E-shaped ring 10 are pressed in order to remove the stopper in the thrust direction of the graphite jig fixing pin 100, the E-shaped ring 10 is not subjected to a great stress even when pressed. The diameter of the E-shaped ring 10 can be expanded. Further, even if the diameter of the E-shaped ring 10 is expanded, the E-shaped ring 10 is not easily deformed greatly, so that the used E-shaped ring 10 can be reused.

Further, as shown in FIG. 5 (a), the following formula is established in relation to the E-shaped ring 10 and the graphite jigs 2 and 3, and therefore the E-shaped ring is formed in the recess 2a of the graphite jig 2. The E-shaped ring 10 can be easily attached to and detached from the graphite jig fixing pin 100 by moving 10 in the thrust direction relative to the graphite jig fixing pin 100.
Ly + Lz + Lt ≦ Lp <Lx + Ly + Lz + Lt

  Furthermore, when the depth of the groove 110 of the graphite jig fixing pin 100 is 0.05 mm or more, the E-shaped ring 10 can be reliably mounted in the groove 110 of the shaft 101 of the graphite jig fixing pin 100. Moreover, when the depth of the groove 110 is less than 0.3 mm, the E-shaped ring 10 can be more easily attached to and detached from the graphite jig fixing pin 100.

  In addition, the inner diameter of the E-shaped ring 10 is smaller than the diameter of the shaft 101 of the graphite jig fixing pin 100 and is within a range of a value obtained by subtracting 0.1 mm from the diameter of the groove 110 of the graphite jig fixing pin 100. Therefore, it is possible to avoid mounting the E-shaped ring 10 in a state where the diameter is greatly expanded so as to project outward from the groove 110 of the shaft 101 of the graphite jig fixing pin 100. Further, since the gap between the inner peripheral surface of the E-shaped ring 10 and the peripheral surface of the groove 110 of the shaft 101 does not occur so much, the diameter of the E-shaped ring 10 is increased in the radial direction of the shaft 101 of the graphite jig fixing pin 100. Not biased in one direction. Therefore, when the graphite jig fixing pin 100 or the E-shaped ring 10 is pressed, the entire E-shaped ring 10 is efficiently stressed evenly, and the inner diameter of the graphite jig fixing pin 100 becomes equal to the outer shape of the shaft 101. Since the diameter can be expanded to the extent, the E-shaped ring 10 can be easily attached to and detached from the graphite jig fixing pin 100.

  In addition, since the shaft 101 of the graphite jig fixing pin 100 is tapered toward the tip, the E-shaped ring 10 is substantially in close contact with the inclined shaft 101. Therefore, stress can be applied evenly to the entire E-shaped ring 10. Thereby, the E-shaped ring 10 can be easily mounted by the graphite jig fixing pin 100.

  In the present embodiment, the side wall of the groove 110 extends in the radial direction of the shaft 101, but the shaft 101 of the side wall of the groove 110 has a larger opening than the bottom surface of the groove 110. The side wall located on the distal end side may be gently inclined toward the distal end of the shaft 101. Thereby, the E-shaped ring 10 can be removed from the groove 110 more easily.

  The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and various modifications can be made as long as they are described in the claims. For example, the shapes and materials of the graphite jig fixing pin 100, the E-shaped ring 10, and the graphite jigs 2 and 3 described in the above embodiment are examples, and different shapes are used for the fixing pins, stoppers, and jigs. Or different materials may be used.

  Next, a modification of the assembly connector according to this embodiment will be described. In the following modifications, the same components as those in the first embodiment of the present invention are denoted by the same reference numerals and description thereof is omitted. In addition, the same material as the graphite jig fixing pin 100 and the E-shaped ring 10 in the first embodiment can be used for the graphite jig fixing pin and the stopper in the following modified examples.

<Modification 1>
The assembly connector according to Modification 1 is different from the assembly connector according to the present embodiment in the shape of the graphite jig fixing pin. In addition, since the other structure of the assembly coupling tool which concerns on the modification 1 is the same as that of the assembly coupling tool of this embodiment, description is abbreviate | omitted. A graphite jig fixing pin 200 shown in FIG. 6A has a columnar second region 201b instead of the second region 101b in the first embodiment. The second region 201b is a cylinder having the same outer diameter as that of the first region 101a.

<Modification 2>
The assembly connector according to Modification 2 is different from the assembly connector according to the present embodiment in the shape of the graphite jig fixing pin. In addition, since the other structure of the assembly coupling tool which concerns on the modification 2 is the same as that of the assembly coupling tool of this embodiment, description is abbreviate | omitted. The graphite jig fixing pin 300 shown in FIG. 6B has a first region 301a instead of the first region 101a in the first embodiment. In the first region 301a, the groove 110 is formed at the tip of the first region 301a. By forming the groove 110 at this position, the groove 110 and the base end of the second region 101b are continuous.

  Effects similar to those of the present embodiment can also be obtained by the assembly connector according to the first and second modifications. Note that the second region 201b may be formed in a tapered shape.

  Moreover, although the 2nd area | region 101b concerning this embodiment and a modification is formed in the truncated cone shape, you may be formed in the cone shape.

<Modification 3>
The assembly connector according to Modification 3 is different from the assembly connector according to the present embodiment in the shape of the stopper (a C-shaped retaining ring is used instead of the E-shaped ring). In addition, since the other structure of the assembly coupling tool which concerns on the modification 3 is the same as that of the assembly coupling tool of this embodiment, description is abbreviate | omitted. As shown in FIG. 7, the C-shaped retaining ring 20 is a non-annular member similar to the E-shaped ring 10 in the first embodiment, and has a substantially C-shaped support portion 21 and both ends of the support portion 21. And a holding portion 22 provided. Moreover, the unevenness | corrugation is not formed in the inner surface of the support part 21. FIG. Further, the shaft of the graphite jig fixing pin is inserted through the hole surrounded by the support portion 21. A gap 20a communicating with the hole exists between both ends of the support portion 21 as in the E-shaped ring 10 in the first embodiment. The C-shaped retaining ring 20 expands or contracts in the circumferential direction of the hole due to the gap 20a, thereby changing the diameter of the hole. The holding part 22 has a convex shape that protrudes toward the center of the C-shaped retaining ring 20 (hole).

  When the C-shaped retaining ring 20 is engaged with a groove formed in the graphite jig fixing pin, the vicinity of the center of the support portion 21 and the two holding portions 22 sandwich the shaft 101 in the radial direction. At this time, the C-shaped retaining ring 20 does not surround the entire circumferential surface of the groove in the circumferential direction.

  The same effect as that of the first embodiment can also be obtained by a connector using the C-shaped retaining ring 20 according to this modification instead of the E-shaped ring 10. Further, the stoppers are not limited to the E-shaped ring 10 and the C-shaped retaining ring 20, and non-annular stoppers such as a round S-shaped retaining ring, a round R-shaped retaining ring, and a bevel-shaped retaining ring may be used.

  Further, in the graphite jig fixing pins 100, 200, and 300 in this embodiment and this modification, the proximal end region from the groove 110 is cylindrical, but the proximal end region from the groove 110 is tapered. It may be formed.

  Further, the connector 150 according to the present embodiment and this modification is used to fix the two graphite jigs 2 and 3, but is used to fix three or more graphite jigs. May be. For example, a different graphite jig may be disposed between the graphite jig 2 and the graphite jig 3, or a different graphite jig may be disposed below the graphite jig 3.

1 Assembly connector 2 Graphite jig (first jig)
2a Recess 2b Hole (first through hole)
3 Graphite jig (second jig)
3a hole (second through hole)
10 E-shaped ring (stopper)
20 C-type retaining ring (stopper)
10a, 20a Gap 100, 200, 300 Graphite jig fixing pin (Jig fixing pin)
110 groove | channel 101a, 301a 1st area | region 101b, 201b 2nd area | region 150

Claims (5)

A first jig having a recess formed in a predetermined surface and a first through hole in a part of the bottom surface of the recess;
A second jig having a second through hole;
In an assembly connector comprising a connector for fixing the first jig and the second jig to each other,
The connector has a jig fixing pin inserted into the first through hole and the second through hole, and a stopper engaged with the jig fixing pin in the recess,
The jig fixing pin has an insertion shaft and a head larger than the diameter of the second through hole at the base end of the insertion shaft,
An annular groove is formed along the peripheral surface of the insertion shaft,
The stopper is a non-annular member that engages the groove without completely surrounding the groove in the circumferential direction;
The assembly connecting tool, wherein the stopper is made of a metal material, and an allowable thrust load of the stopper is 70 (N) or more and 500 (N) or less. The assembly coupling tool according to claim 1, wherein the jig fixing pin and the stopper satisfy the following expression (1).
Ly + Lz + Lt ≦ Lp <Lx + Ly + Lz + Lt (1)
here,
Lp: length from the proximal end of the insertion shaft to one end of the groove located on the distal end side of the insertion shaft in the longitudinal direction of the insertion shaft Lx: length in the depth direction of the recess Ly: the first penetration Length in the depth direction of the hole Lz: Length in the depth direction of the second through hole Lt: Thickness of the stopper   The assembly connector according to claim 1 or 2, wherein the groove along the peripheral surface of the insertion shaft has a depth of 0.05 mm or more and less than 0.3 mm.   The inner diameter of the stopper is smaller than the diameter of the insertion shaft and belongs to a range of a value obtained by subtracting 0.1 mm from the diameter of the groove. The assembly connector according to item.   The assembly coupling tool according to any one of claims 1 to 4, wherein the insertion shaft has a tapered shape tapered toward the tip.

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