CN103563506B

CN103563506B - Assembly and connection instrument

Info

Publication number: CN103563506B
Application number: CN201280026608.0A
Authority: CN
Inventors: 指尾博
Original assignee: Toyo Tanso Co Ltd
Current assignee: Toyo Tanso Co Ltd
Priority date: 2011-05-30
Filing date: 2012-05-30
Publication date: 2016-12-28
Anticipated expiration: 2032-05-30
Also published as: JP5777205B2; JP2012247031A; WO2012165478A1; CN103563506A

Abstract

The invention discloses a kind of assembly and connection instrument, it is possible to easily carry out the stop part mounting or dismounting relative to graphite fixture fastening pin.By the fixing graphite fixture (2,3) of connector (150).Connector (150) has graphite fixture fastening pin (100) and acyclic E shape ring (10).The axle (101) of graphite fixture fastening pin (100) is formed with ring-type groove along its side face.The axle (101) of graphite fixture fastening pin (100) inserts in hole (2b, 3a), in recess (2a), E shape ring (10) is fastened in the groove of the axle (101) being formed at graphite fixture fastening pin (100).By applying a force upon the front end of graphite fixture fastening pin (100), E shape ring (10) departs from from graphite fixture fastening pin (100).

Description

Assembling and connecting tool

Technical Field

The present invention relates to an assembly and connection tool for positioning and assembling electronic components.

Background

When mounting an electronic component on a circuit board, positioning of the electronic component and assembly of the electronic component are performed by a jig. When a plurality of jigs are repeatedly used, the jigs are fixed to each other by a connecting tool or the like. As a method of fixing by a connecting tool or the like, a method of inserting a fixing pin into a through-hole of a jig and fixing a tip end of the fixing pin by a stopper is known. As the stopper, a stopper that is inserted from the vertical direction (hereinafter, referred to as a radial direction) with respect to the shaft portion (longitudinal direction) of the fixing pin, for example, an annular stopper such as an E-ring, a K-ring, or a U-ring, or a stopper that is inserted from the horizontal direction (hereinafter, referred to as a thrust direction) with respect to the shaft portion (longitudinal direction) of the fixing pin, for example, an annular stopper such as a C-ring or a circular S-ring, may be used. The non-annular stopper inserted from the radial direction with respect to the fixing pin is slid with respect to the fixing pin to be attached to and detached from the pin. The non-annular stopper inserted from the thrust direction with respect to the fixing pin has a small hole, and a special tool such as snap ring pliers is inserted into the small hole to be attached and detached in a state where the stopper is expanded. Further, the locknut shown in patent document 1 may be used as the stopper. The locknut can be moved in the thrust direction relative to the fixing pin to be fitted without using a special tool, and the connecting tool can be connected more firmly than the non-annular stopper. However, the locknut fitted to the fixing pin is deformed from its original shape, and cannot be reused. Further, since the locknut and the fixing pin are connected to each other relatively firmly, the locknut cannot be easily removed from the fixing pin when the connection is released, and if the locknut is forcibly removed, the fixing pin or the locknut may be damaged.

In recent years, graphite jigs having a recessed portion formed on a predetermined surface have been used, and it has been required to frequently attach and detach a fixing tool in order to replace the jig. When the plurality of jigs are fixed to each other by the jig, the stopper can be attached to the fixing pin in the recess, and therefore the tip of the fixing pin can be prevented from protruding from the upper surface of the jig. In this case, when using a non-annular stopper such as an E-ring, a K-ring, or a U-ring, which is inserted into the fixing pin from the radial direction, it is desirable to secure a sufficient space in the recess, which allows the stopper to slide in the radial direction with respect to the fixing pin. However, in order to secure the space, it is necessary to form a large recess in the jig relative to the fixing pin, and therefore 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 in selecting the concave portion corresponding to the jig combination is limited. Further, the work of removing the non-annular stopper from the fixing pin by sliding the non-annular stopper in the radial direction in the small recess formed in the jig imposes a large burden on the worker. Further, as a method of removing the stopper from the pin without sliding, there is known a method of removing the stopper from the pin by applying a force to the stopper using pliers or the like, or by pushing a tip portion of the fixing pin to deform the stopper. However, this method deforms the stopper from its original shape, and therefore the stopper once used cannot be reused. Further, when the material of the stopper is stainless steel, even if the thickness of the stopper is, for example, about 0.25(mm), a load (hereinafter, referred to as an allowable thrust load) that can break the stopper or the shaft portion or separate the stopper generally exceeds 100 (N). Therefore, it is difficult to deform the stopper by this method.

In order to solve the above problem, patent document 2 discloses a stopper (anti-slip ring) using a shape memory alloy. Since the shape memory alloy is deformed by heat, the diameter of the detachment prevention ring is increased by thermally expanding the detachment prevention ring by heating the detachment prevention ring. This makes it possible to easily remove the anti-slip ring from the connecting pin (fixing pin) in the axial direction.

Further, patent document 3 discloses a press-fitting device in which a stopper is attached to a stud (fixing pin). In the case of this press-fitting device, the stopper is press-fitted in the axial direction of the pin while expanding the opening of the stopper, and is attached to the stud (fixing pin).

Patent document 1, Japanese patent application laid-open No. H06-37482

Japanese patent laid-open No. 2009-68585 of patent document 2

Patent document 3 Japanese Kokoku publication Sho 54-44320

However, the material of the slip-off preventing ring disclosed in patent document 2 is limited to the shape memory alloy, and when the slip-off preventing ring is removed from the connecting pin (fixing pin), a heating operation is required. The operation of attaching and detaching the slip-off preventing ring is limited by the fixing time of the slip-off preventing ring to thermally expand. Further, the press-fitting device disclosed in patent document 3 can be attached to a stud (fixing pin) by moving a stopper in a radial direction with respect to the stud (fixing pin), but in order to perform this operation in a recess provided in a jig, a space in which an elongated hollow outer cylinder of a special tool can be inserted must be present in the recess. As a result, the recesses become larger, and the absolute number of recesses that can be formed in the jig decreases. Further, the stopper is not suitable for the operation of moving the temporarily attached stopper in the thrust direction with respect to the stud (fixing pin) to remove the stopper from the stud (fixing pin).

Disclosure of Invention

The invention aims to provide an assembling and connecting tool, which can easily assemble and disassemble a stop piece for preventing falling off relative to a fixing pin of a graphite clamp in a concave part formed on a specified surface of the graphite clamp.

The assembly connecting tool of the present invention comprises: a first jig having a recess formed in a predetermined surface and a first through hole formed in a part of a bottom surface of the recess; a second clamp having a second through hole; and a connector for fixing the first and second clamps to each other, the connector having a clamp fixing pin inserted through the first and second through holes; and a stopper that engages with the jig fixing pin in the recess, wherein the jig fixing pin has an insertion shaft and a head portion that is larger in diameter than the second through-hole at a base end of the insertion shaft, an annular groove is formed along a circumferential surface of the insertion shaft, the stopper is a non-annular member that engages with the groove in a state in which the stopper does not completely surround the groove in a circumferential direction, the stopper is made of a metal material, and an allowable thrust load of the stopper is 70(N) to 500 (N). Here, the "allowable thrust load" refers to a force (load) by which the stopper is not broken or separated from the jig fixing pin when the stopper is urged in the thrust direction (axial direction) when the stopper is engaged with the jig fixing pin.

According to the present invention, since the stopper is an acyclic member that engages with the groove of the jig fixing pin in a state where the stopper does not completely surround the groove in the circumferential direction, even if the allowable thrust load of the stopper is, for example, 70(N) or more and 500(N) or less, when the jig fixing pin or the stopper is pressed in order to attach or detach the stopper in the thrust direction of the graphite jig fixing pin, the diameter of the stopper can be increased without applying a large stress to the stopper. Therefore, by moving the stopper in the thrust direction with respect to the jig fixing pin, the stopper can be easily attached to and detached from the jig fixing pin. This can improve workability. Further, even if the diameter of the stopper is enlarged, the stopper is difficult to deform significantly, and the stopper after use can be reused.

In the assembly and connection tool of the present invention, it is preferable that the jig fixing pin and the stopper satisfy the following equation (1).

Ly+Lz+Lt≤Lp<Lx+Ly+Lz+Lt．．．(1)

Wherein, Lp: a length from a base end of the insertion shaft to one end of the groove located on a front end side of the insertion shaft in a length direction of the insertion shaft

Lx: a length of the recess in a depth direction

Ly: a length of the first through-hole in a depth direction

And Lz: a length of the second through-hole in a depth direction

And Lt: thickness of the stopper

The "depth of the recess" indicates a distance from an opening of the recess to the bottommost portion of the recess in the height direction (depth direction) of the recess.

According to the above configuration, 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 in the recess of the first jig.

In the assembly and connection tool of the present invention, it is preferable that the depth of the groove along the circumferential surface of the insertion shaft is 0.05mm or more and less than 0.3 mm. Here, the "depth of the groove" indicates a distance obtained by halving the difference between the maximum outer diameter of the insertion shaft and the minimum outer diameter of the groove portion in the diameter direction of the insertion shaft.

By setting the depth of the groove to 0.05mm or more, the stopper can be reliably attached to the groove of the insertion shaft of the jig fixing pin. Further, by making the depth of the groove smaller than 0.3mm, the stopper can be more easily attached to and detached from the jig fixing pin.

In the assembly and connection tool of the present invention, it is preferable that the stopper has an inner diameter smaller than the diameter of the insertion shaft and falls within a range of a value obtained by subtracting 0.1mm from the diameter of the groove.

According to the above configuration, it is possible to avoid the stopper from being mounted in a state where the diameter of the stopper is greatly enlarged by outwardly expanding the stopper with respect to the groove of the insertion shaft of the jig fixing pin. Since almost no gap is formed between the inner peripheral surface of the stopper and the peripheral surface of the groove of the insertion shaft, the diameter of the stopper is not expanded in one direction in the radial direction of the insertion shaft of the jig fixing pin. Accordingly, when the graphite jig fixing pin or the stopper is pressed, stress is efficiently and uniformly applied to the entire stopper, and the inner diameter of the jig fixing pin can be enlarged to the same extent as the outer shape of the insertion shaft, so that the stopper can be easily attached to and detached from the jig fixing pin.

In the assembly and connection tool according to the present invention, it is preferable that an inner diameter of the stopper when engaged with the groove of the jig fixing pin is larger by 0.05mm to 0.3mm than an inner diameter of the stopper when not engaged with the groove of the jig fixing pin.

With the above configuration, the stopper can be easily attached to and detached from the jig fixing pin while securing good adhesion between the jig fixing pin and the stopper.

In the assembly and connection tool of the present invention, it is preferable that the insertion shaft has a tapered shape that tapers toward the distal end.

Since the insertion shaft is tapered toward the distal end, the stopper is substantially similarly in close contact with the inclined insertion shaft. Therefore, stress can be uniformly applied to the entire stopper. This makes it possible to easily attach and detach the stopper to and from the jig fixing pin.

According to the assembly and connection tool 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 removed from the graphite jig fixing pin in the recess.

Drawings

Fig. 1 is an external view of an assembly and connection tool according to the present embodiment.

FIG. 2 is an enlarged view of a groove formed in the graphite jig shown in FIG. 1, wherein (a) is a plan view and (b) is a sectional view of IIB-IIB in (a).

Fig. 3 is a schematic view of the graphite jig fixing pin shown in fig. 2, wherein (a) is a perspective view, and (b) is a schematic view showing the periphery of the tip of the graphite jig fixing pin.

Fig. 4 is a top view of the stopper shown in fig. 2.

Fig. 5(a) is a V-V sectional view in fig. 2(a), and fig. 5(b) is a sectional view of an assembly and connection tool according to a reference example.

Fig. 6(a) and 6(b) are perspective views of a graphite jig fixing pin used in a modification.

Fig. 7 is a plan view of a stopper used in a modification.

Description of the symbols:

1: assembling and connecting tool

2: graphite jig (first clamp)

2a. recess

Hole (first through hole)

3: graphite jig (second clamp)

Hole (second through hole)

E-ring (stop)

C-shaped retainer ring (stop piece)

10a, 20a gap

100. 200 and 300: graphite clamp fixing pin (clamp fixing pin)

110. Trough

101a, 301 a: first region

101b, 201 b: second region

150: connecting piece

Detailed Description

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

(first embodiment)

Here, a first embodiment of a connector and a graphite jig fixing pin according to the present invention will be described with reference to fig. 1 to 5. Fig. 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. 1.

(Assembly connection tool 1)

As shown in fig. 1, the assembly and connection tool 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 a connector 150 for fixing the graphite jigs 2 and 3. As shown in fig. 2(a) and (b), the connector 150 includes a graphite jig fixing pin (jig fixing pin) 100 and an E-ring (stopper) 10. As shown in fig. 1 and 2, the graphite jig 2 is a single flat plate-shaped jig having a plurality of recesses 2a formed in the upper surface thereof. The plurality of concave portions 2a are all substantially the same in shape and arranged substantially in a lattice shape with a predetermined interval. As shown in fig. 2(a), the recess 2a is formed to have a substantially circular cross section when viewed from above. The graphite jig 3 is a flat plate-like jig smaller than the graphite jig 2. As shown in fig. 2(b), the graphite jig 3 is disposed below the recess 2a of the graphite jig 2. 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 is provided with a recess 2a and a hole (first through-hole) 2b penetrating from a part of the bottom surface of the recess 2a to the lower surface of the graphite jig 2 in the depth direction of the recess 2a (the thickness direction of the graphite jig 2). 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 through the recess 2a and the hole 2b. Further, a hole (second through-hole) 3a penetrating in the thickness direction is formed in the graphite jig 3. 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. 2(a), in the present embodiment, the recess 2a is formed in a circular shape having a slightly larger cross section than the outer periphery of the E-ring 10 when viewed from above. When the E-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-ring 10 in the recess 2a. Therefore, the E-ring 10 can hardly be moved in the sliding direction (the width direction of the recess 2 a).

The outer diameters of the holes 2b and 3a are slightly larger than the outer diameter of a shaft 101 of a graphite jig fixing pin 100 described later. Further, the outer diameters of the holes 2b and 3a 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-ring 10. Although the outer diameters of the holes 2b and 3a are substantially the same in the present embodiment, the outer diameters of the holes 2b and 3a may be different from each other.

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

(attachment 150)

As described above, the connector 150 includes the graphite jig fixing pin 100 and the E-ring 10. As shown in fig. 2(b), the E-ring 10 is attached to the graphite jig fixing pin 100 in the recess 2a formed in the graphite jig 2. Thus, the graphite jigs 2 and 3 are fixed to each other in the vertical direction 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 102 provided at the base end of the shaft 101. The head 102 is a circular plate having an outer diameter larger than that of the shaft 101, and holds the graphite jigs 2 and 3 from the side of (below) the graphite jig 3 (fig. 2 (b)). The shaft 101 and the head 102 are joined in such a manner that their respective centers coincide. The centers may be shifted according to specifications or the like, and do not necessarily need to be aligned. The shaft 101 has a cylindrical first region 101a located on the proximal end side of the graphite jig fixing pin 100 and a tapered second region 101b located on the distal end side of the graphite jig fixing pin 100 with respect to the first region 101 a.

In addition, in the present embodiment, the first region 101a is a region having a length of about three-quarters from the base end toward the tip end in the longitudinal direction of the shaft 101, and the second region 101b is the remaining region, i.e., a region having a length of about one-quarter from the tip end toward the base end in the longitudinal direction of the shaft 101. The second region 101b is tapered toward the tip of the shaft 101, and the first region 101a and the second region 101b are connected to each other so as to be continuous in outer diameter.

An annular groove 110 is formed along the outer peripheral surface of the side surface of the first region 101a on the tip side (second region 101b side). As shown in fig. 3(a) and (b), the groove 110 is formed to have a substantially cross-section in the longitudinal direction of the shaft 101Character shape. The width of the groove 110 (the width in the longitudinal direction of the shaft 101 (distance B shown in FIG. 3(B)) is slightly larger than the thickness of the E-ring 10 (Lt shown in FIG. 5 (a)), the depth of the groove 110 (the depth in the radial direction of the shaft 101 (distance A shown in FIG. 3(B)) is 0.05mm or more and less than 0.3mm, the outer diameter of the bottommost portion 110c of the groove 110 is the same as or slightly larger than the diameter of the E-ring 10. here, the diameter of the hole formed in the vicinity of the center of the E-ring 10. specifically, the diameter d of the maximum circle contacting 3 projections (locking portions) 12 shown in FIG. 4. when the E-ring 10 is engaged in the groove 110 having such a shape, the E-ring 10 is engaged with the groove 110 in a state where the hole diameter is not changed (a state where the E-ring 10 is not expanded or reduced in the circumferential direction) or in a state where the hole diameter is slightly increased (a state where the E-ring 10 is slightly expanded in the circumferential direction).

Next, the relationship between the E-ring 10 and the graphite jigs 2 and 3 will be described with reference to fig. 5. Fig. 5(a) shows an assembly and connection tool according to the present embodiment, and fig. 5(b) shows an assembly and connection tool according to a reference example.

As shown in fig. 5(a), the following equation holds in relation to the relationship between the shaft 101 of the graphite jig fixing pin 100 according to the present embodiment and the E-ring 10 and the graphite jigs 2 and 3.

Ly+Lz+Lt≤Lp<Lx+Ly+Lz+Lt

Here, ,

lp: the length from the base end of the shaft 101 to the upper end of the groove 110 (one end of the groove 110 (edge 110a of the upper side surface) on the leading end side of the shaft 101) in the longitudinal direction of the shaft 101

Lx: length of the recess 2a in the depth direction

LY: the length of the hole (first through-hole) 2b in the longitudinal direction (depth direction)

And Lz: the length of the hole (second through-hole) 3a in the longitudinal direction (depth direction)

And Lt: thickness of E-ring 10

When the graphite jig 3 is fixed to the graphite jig 2 by the graphite jig fixing pin 100 having the length of the shaft 101, the E-ring 10 is engaged with the groove 110 in the recess 2a.

Next, a reference example will be described with reference to fig. 5 (b). The graphite jig fixing pin 600 shown in fig. 5(b) has a shaft 601 and a head 602 provided at the base end of the shaft 601. The tip end portion of the shaft 601 is formed in a tapered shape that tapers toward the tip end, like the shaft 101. The shaft 601 is formed with a groove 610 similar to the shaft 101. As shown in fig. 5(b), when Lp >/Lx + Ly + Lz + Lt (Lp = Lx + Ly + Lz + Lt + Lc), the E-ring 10 is attached to the graphite jig fixing pin 600 outside the recessed portion 2a, and therefore, the E-ring 10 can be removed from the graphite jig fixing pin 600 by sliding. Further, although not shown, when Lp < Ly + Lz + Lt, part or all of the groove 110 is located 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-ring 10 is not completely engaged with the groove 110, it may be undesirably separated from the groove 110 by an accidental impact.

When the graphite jig 2 and 3 are fixed by the connector 150, the distance Lb from the bottom surface of the recessed portion 2a to the bottom surface of the E-ring 10 in the longitudinal direction of the graphite jig fixing pin 100 is preferably less than about 0.3 mm. When the distance Lb is 0.3mm or more, the gap formed between the head 102 and the E-ring 10 becomes large, and there is a possibility that the tightness between the graphite jig 2 and the graphite jig 3 cannot be maintained when the graphite jig 2 and the graphite jig 3 are fixed by the connector 150.

Further, by setting the depth of the groove 110 (distance a shown in fig. 3 b) to 0.05mm or more and less than 0.3mm, the tip of the graphite jig fixing pin 100 can be pressed against the E-ring 10 engaged in the groove 110 in the recess 2a by a tool operated by a human power (about 47N or more and 57N or less), the diameter of the E-ring (stopper) can be expanded in the circumferential direction, and the E-ring can be easily attached and detached. That is, by setting the depth of the groove 110, the E-ring 10 can be easily removed from the groove 110 by applying manual force with a tool. Further, when the depth of the groove 110 is 0.3mm or more, the E-ring 10 is firmly engaged with the groove 110 because the groove 110 is deep, but the E-ring (stopper) may not be expanded in diameter in the circumferential direction to such an extent that the E-ring is disengaged from the graphite jig fixing pin by pressing with a manually operated tool, and therefore, when the E-ring 10 is removed from the graphite jig fixing pin 100, the E-ring 10 must be deformed with a tool such as pliers. Therefore, the E-ring 10 cannot be easily removed from the graphite jig fixing pin 1() (). Further, the E-ring 10 cannot be reused because it is deformed from its original shape. On the other hand, when the depth of the groove 110 is less than 0.05mm, since the groove 110 is shallow, even if the E-ring 10 is engaged with the groove 110, the E-ring 10 is easily detached from the groove 110. Therefore, the graphite jigs 2 and 3 cannot be firmly fixed, and the E-ring 10 may be detached from the graphite jig fixing pin 100 in the mounting work of the electronic component. Further, the depth (distance A) of the groove 110 is more preferably 0.05mm or more and less than 0.15 mm. When the depth of the groove 110 is less than 0.15mm, the graphite jig 2 or 3 can be more reliably fixed, and the E-ring 10 can be attached to and detached from the graphite jig fixing pin 100 with a smaller force. Therefore, when the number of times the E-ring 10 is attached to and detached from the graphite jig fixing pin 100 is large, the work efficiency can be improved.

Here, the "depth of the groove 110" in the present embodiment refers to a distance a from the opening of the groove 110 to the bottommost portion 110c in the diameter direction of the shaft 101 (fig. 3 (b)). In the present embodiment, the edge 110a shown in fig. 3(b) is the maximum outer diameter of the shaft 101 (the outer diameter is the same as the outer diameter of the first region 101a and the maximum outer diameter of the second region 101 b). Here, the edge 110a is an edge of the groove 110 (an edge 110a of an upper side surface of the groove 110) located on the front end side of the shaft 101. Further, in the region on the tip side of the groove 110 of the shaft 101, there is no region having an outer diameter larger than that of the edge 110 a. If there is a region having an outer diameter larger than the edge 110a on the tip side of the groove 110 of the shaft 101, the E-ring 10 must be damaged or the E-ring 10 must be deformed in order to remove the E-ring 10 from the graphite jig fixing pin 100. Further, "the bottommost portion 110 c" in the present embodiment is the position closest to the center of the shaft 101 in the bottom surface of the groove 110.

In addition, the groove 110 in the present embodiment is formed to have a substantially flat cross section in the depth direction (cross section in the longitudinal direction of the shaft 101)The cross section of the groove 110 is not limited to a fontA font. For example, the groove 110 may be a groove having a substantially U-shaped cross section with a circular shape at the bottom, or may be a groove having a V-shaped cross section in which the width of the groove increases from the bottom toward the depth of the groove.

The position of the groove 110 is not limited to the tip side of the first region 101a shown in fig. 3(a), and may be appropriately changed depending on the thickness of the graphite jig 2 or 3. For example, the groove 110 may be formed closer to the base end side of the shaft 101 than shown in fig. 3(a), or the groove 110 may be formed closer to the tip end side of the shaft 101 than shown in fig. 3(a) so that the opening (edge 110a) of the groove 110 is continuous with the second region 101 b.

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 fig. 2 and 3, and for example, a shaft in which the outer diameter of the first region 101a is about 1.6mm to 5mm and the length of the first region 101a in the longitudinal direction is about 3.0mm to 30.0mm may be used. The ratio of the first region 101a to the second region 101b in the longitudinal direction is not limited to the ratio of 3:1 shown in fig. 3 (a). For example, the length of the first region 101a in the longitudinal direction may be shortened, or the second region 101b may be extended further in the longitudinal direction of the shaft 101. As the taper shape of the second region 101b, a taper shape that is inclined more gradually than the shape shown in fig. 3(a) may be used, or a taper shape that is less acute than the shape shown in fig. 3(a) may be used. The graphite jig fixing pin 100 is not limited to the above-described materials and shapes, and other materials or graphite jig fixing pins having different shapes may be used. The shape of the head 102, the length of the shaft 101, the diameter of the shaft 101, and the like can be appropriately changed according to the shape of the graphite jig 2, 3, the length of the holes 2b, 3a in the longitudinal direction, and the depth (height) of the recess 2a.

(E-shaped ring 10)

As shown in fig. 4, the E-ring 10 is made of a stainless steel material, and has a substantially C-shaped support portion 11 and 3 projections (locking portions) 12 formed on the inner surface of the support portion 11. A hole surrounded by 3 projections (locking portions) 12 is formed near the center of the E-ring 10, and the shaft 101 is inserted through the hole. A gap 10a communicating with the hole is present between both ends of the support portion 11, and the E-ring 10 is expanded or contracted in the circumferential direction of the hole through the gap 10a to change the diameter of the hole. The 3 projections (locking portions) 12 are formed at both ends and near the center of the support portion 11 by forming two recesses at the inner side of the support portion 11.

In the present embodiment, for example, an E-ring (JIS B28051.5 (E-ring 1 made of stainless steel for spring having hardness of HRC44 to 53)) having the following diameter can be used. The markers (D, H) shown below are those shown in fig. 4.

d：1.5cm

D：4.0cm

H.1.3cm

Thickness of E-ring: 0.4cm

A pin having a shaft with an outer diameter of 1.53cm can be applied to the E-ring 10.

When the E-ring 10 is attached to the graphite jig fixing pin 100, 3 projections (locking portions) clamp the shaft 101 as shown in fig. 2 (a). At this time, the E-ring 10 does not circumferentially surround the entire circumferential surface of the groove 110.

The diameter (inner diameter (d shown in fig. 4)) of the E-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 falls within a range of a value obtained by subtracting 0.1mm or more from the diameter of the portion of the shaft 101 where the groove 110 is formed. The depth (distance a shown in fig. 3(b)) of the groove 110 of the graphite jig fixing pin 100 to which the E-ring 10 is attached is 0.05mm or more and less than 0.3 mm. This prevents excessive clearance from occurring between the inner circumferential surface of the projection 12 of the E-ring 10 and the portion of the shaft 101 where the groove 110 is formed. Therefore, the E-ring 10 is not biased in one direction in the radial direction of the shaft 101 of the graphite jig fixing pin 100. Therefore, when the graphite jig fixing pin 100 or the E-ring 10 is pressed, the E-ring 10 can be pressed so that stress is uniformly applied to the entire E-ring 10, and stress concentration on a part of the E-ring 10 can be prevented. Preferably, the inner diameter d of the E-ring 10 when engaged with the groove 110 of the graphite jig fixing pin 100 is larger by 0.05mm or more and 0.3mm or less than the inner diameter d of the E-ring 10 when not engaged with the groove 110 of the graphite jig fixing pin 100. By setting the thickness to 0.05mm or more, good adhesion between the E-ring 10 and the graphite jig fixing pin 100 can be obtained, and generation of a gap can be suppressed. Further, by making it smaller than 0.3mm, the E-ring 10 can be easily attached to the graphite jig fixing pin 100 or detached from the graphite jig fixing pin 100.

The gap 10a is not limited to the size of the gap 10a shown in fig. 4. For example, the gap 10a may be made extremely small by extending the both ends of the support portion 11 further in the circumferential direction. Thus, the stopper (E-ring 10) constituting the link 150 is preferably an annular stopper. When a ring-shaped stopper is used as the stopper, the groove 110 is surrounded in the circumferential direction, but when the stopper is mounted on the graphite jig fixing pin, the outer diameter (bore diameter) of the stopper is almost unchanged even if an external force is applied to the stopper, and therefore, when the stopper is removed from the groove 110, the stopper must be deformed like a locknut. On the other hand, in the E-ring 10 of the present invention, when stress due to external force is applied to the E-ring 10, the gap 10a expands in the circumferential direction of the hole, and the diameter expands to such an extent that the E-ring 10 does not deform. Therefore, the E-ring 10 can be easily removed from the groove 110 without deforming it. The diameter of the E-ring 10 is preferably substantially the same as the outer diameter of the shaft 101 or slightly smaller than the outer diameter of the shaft 101. The term "deformation" as used herein does not mean a state in which the shape is temporarily changed when an external force is applied, but means a state in which the shape is not restored to the original shape after the external force is applied. This matter can be determined by the practitioner in consideration of the material used for the stopper.

As shown in fig. 2(b), the E-ring 10 fixes the graphite jigs 2 and 3 from the side of (above) the graphite jig 2. For example, although the E-ring 10 may be made of stainless steel, or the like, the material of the stopper is not limited to these materials. Further, a stopper conforming to the size and shape of the graphite jig fixing pin 100 may be used as the stopper (E-ring 10) constituting the connector 150. For example, a stopper having a different bore size or a stopper having a different shape from the support 11 shown in fig. 4 may be used depending on the outer diameter of the shaft 101 and the outer diameter of the groove 110. The stopper is not limited to the E-ring 10, and an annular stopper such as a C-ring described later may be used.

The E-ring 10 of the present embodiment is made of a stainless material and is not easily deformed. The allowable thrust load of the E-ring 10 is 70(N) to 500 (N). When the allowable thrust load is less than 70(N), the E-ring 10 may be deformed when forcibly pressed to attach or detach the E-ring 10 to or from the graphite jig fixing pin 100. Further, when the allowable thrust load exceeds 500(N), it is not appropriate to enlarge the diameter of the stopper by applying a manual force of about 47(N) to 57(N) with a tool. As described above, in the present embodiment, the E-ring 10 having a hole with an inner diameter generally used and made of stainless steel is used as the stopper. Further, it is more preferable that the allowable thrust load of the E-ring 10 is 100(N) to 300 (N).

(method of attaching E-ring 10 to graphite jig fixing pin 100)

The graphite jigs 2 and 3 are stacked 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 side of the graphite jig 3. Then, the E-ring 10 is pressed in the thrust direction (the 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 manual force (about 47(N) to 57 (N)). Since the work of pressing the E-ring 10 is a delicate work, it is preferable to use various tools that can press only the E-ring 10. As a result, the E-ring 10 moves in the thrust direction (the longitudinal direction of the shaft 101) while slightly increasing its hole diameter (d shown in fig. 4) and engages with the groove 110. When the E-ring 10 is attached to the graphite jig fixing pin 100, the force is uniformly applied to the E-ring 10 because the E-ring 10 is closely attached to the inclined second region 101b with the fitting clearance 10 a. The E-ring 10 attached to the graphite jig fixing pin 100 does not circumferentially surround the entire circumferential surface of the groove 110, and is engaged with the groove 110 in a state where the hole diameter is slightly enlarged (a state where the hole diameter is slightly enlarged in the circumferential direction (outer side) of the groove 110) or a state where the hole diameter is hardly changed (a state where the hole diameter is hardly enlarged or reduced in the circumferential direction of the groove 110) (fig. 2(a), (b)).

(method of removing E-ring 10 from graphite jig fixing pin 100)

From the state shown in fig. 2(a) and (b), a force is applied to the tip of the graphite jig fixing pin 100 in the thrust direction (the longitudinal direction of the shaft 101). In this case, various cylindrical tools capable of pressing only the graphite jig fixing pin 100 are preferably used, and the pressing force with which the graphite jig fixing pin 100 is pressed by the cylindrical jig may be substantially the same as the force applied when the E-ring 10 is attached to the graphite jig fixing pin 100 (approximately 47(N) to 57 (N)). When a force is applied to the E-ring 10, the graphite jig fixing pin 100 moves toward the base end side, and the side wall (upper side surface) of the groove 110 presses the E-ring 10. Thereby, the clearance 10a of the E-ring 10 is expanded in the circumferential direction (outside), and the hole diameter (d shown in fig. 4) of the E-ring 10 is substantially the same as or slightly larger than the outer diameter of the edge 110a of the groove 110. Then, the E-ring 10 is disengaged from the groove 110, and the E-ring 10 moves toward the tip side of the graphite jig fixing pin 100.

As described above, according to the assembly and connection tool 1 of the present embodiment, the following effects can be obtained. Since the E-ring 10 is an acyclic member that engages with the groove 110 of the graphite jig fixing pin 100 in a state where the groove 110 is not completely surrounded in the circumferential direction, even if the allowable thrust load of the stopper is 70(N) or more and 500(N) or less, when the graphite jig fixing pin 100 or the E-ring 10 is pressed in order to attach or detach the stopper in the thrust direction of the graphite jig fixing pin 100, a large stress is not applied to the E-ring 10, and the diameter of the E-ring 10 can be enlarged. Further, even if the diameter of the E-ring 10 is enlarged, the E-ring 10 is less likely to be deformed greatly, and therefore the E-ring 10 after use can be reused.

Further, as shown in fig. 5(a), since the following equation is satisfied in relation to the E-ring 10 and the graphite jig 2 and 3, the E-ring 10 can be easily attached to and detached from the graphite jig fixing pin 100 by moving the E-ring 10 in the thrust direction with respect to the graphite jig fixing pin 100 in the recess 2a of the graphite jig 2.

Ly+Lz+Lt≤Lp≤Lx+Ly+Lz+Lt

Further, by setting the depth of the groove 110 of the graphite jig fixing pin 100 to 0.05mm or more, the E-ring 1 can be reliably attached to the groove 110 of the shaft 101 of the graphite jig fixing pin 100. Further, by setting the depth of the groove 110 to less than 0.3mm, the attachment and detachment of the E-ring 10 to and from the graphite jig fixing pin 100 can be performed more easily.

Further, since the inner diameter of the E-ring 10 is smaller than the diameter of the shaft 101 of the graphite jig fixing pin 100 and falls within a range obtained by subtracting 0.1mm from the diameter of the groove 110 of the graphite jig fixing pin 100, it is possible to avoid a situation in which the E-ring 10 is mounted in a state in which the diameter is greatly enlarged by protruding outward with respect to the groove 110 of the shaft 101 of the graphite jig fixing pin 100. Since there is almost no gap between the inner peripheral surface of the E-ring 10 and the peripheral surface of the groove 110 of the shaft 101, the diameter of the E-ring 10 is not expanded in one direction in the radial direction of the shaft 101 of the graphite jig fixing pin 100. Accordingly, when the graphite jig fixing pin 100 or the E-ring 10 is pressed, stress is efficiently and uniformly applied to the entire E-ring 10, and the inner diameter of the graphite jig fixing pin 100 can be enlarged to the same extent as the outer shape of the shaft 101, so that the attachment and detachment of the graphite jig fixing pin 100 to and from the E-ring 10 can be easily performed.

Further, since the shaft 101 of the graphite jig fixing pin 100 is tapered toward the tip, the E-ring 10 is substantially similarly in close contact with the inclined shaft 101. Therefore, stress can be uniformly applied to the entire E-ring 10. Thus, the E-ring 10 can be easily attached by the graphite jig fixing pin 100.

In the present embodiment, the side walls of the groove 110 extend in the radial direction of the shaft 101, and the side wall of the groove 110 located on the distal end side of the shaft 101 may be inclined gradually toward the distal end of the shaft 101 so that the opening of the groove 110 is larger than the bottom surface of the groove 110. Thus, the E-ring 10 can be more easily removed from the groove 110.

While the preferred embodiments of the present invention have been described above, the present invention is not limited to the embodiments, and various modifications may be made within the scope of the claims. For example, the shapes and materials of the graphite jig fixing pin 100, the E-ring 10, and the graphite jigs 2 and 3 described in the above embodiments are merely examples, and fixing pins, stoppers, and jigs having different shapes and materials may be used.

Next, a modified example of the assembly and connection tool according to the present embodiment will be described. In the following modifications, the same members as those of the first embodiment of the present invention are denoted by the same reference numerals, and descriptions thereof are omitted. Further, the graphite jig fixing pin and the stopper in the following modification can be made of the same material as the graphite jig fixing pin 100 and the E-ring 10 in the first embodiment.

(modification 1)

The assembly and connection tool according to modification 1 is different from the assembly and connection tool according to the present embodiment in the shape of the graphite jig fixing pin. The other configurations of the assembly and connection tool according to modification 1 are the same as those of the assembly and connection tool according to the present embodiment, and therefore, the description thereof is omitted. The graphite jig fixing pin 200 shown in fig. 6(a) 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 the first region 101 a.

(modification 2)

The assembly and connection tool according to modification 2 is different from the assembly and connection tool according to the present embodiment in the shape of the graphite jig fixing pin. The other structure of the assembly and connection tool according to modification 2 is the same as that of the assembly and connection tool according to the present embodiment, and therefore, the description thereof is omitted. The graphite jig fixing pin 300 shown in fig. 6(b) 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 front end of the first region 301 a. By forming the groove 110 at this position, the groove 110 is continuous with the base end of the second region 101 b.

The assembly and connection tool according to modifications 1 and 2 can also obtain the same effects as those of the present embodiment. In addition, the second region 201b may be tapered.

The second region 101b according to the present embodiment and the modification may be formed in a truncated cone shape or a tapered shape.

(modification 3)

The assembly and connection tool according to modification 3 is different from the assembly and connection tool of the present embodiment in the shape of the stopper (C-shaped retainer ring is used instead of the E-shaped ring). Since the other configurations of the assembly and connection tool according to modification 3 are the same as those of the assembly and connection tool according to the present embodiment, the description thereof is omitted. As shown in fig. 7, the C-shaped retainer ring 20 is a non-annular member similar to the E-ring 10 in the first embodiment, and has a substantially C-shaped support portion 21 and holding portions 22 provided at both ends of the support portion 21, respectively. Further, the inner surface of the support portion 21 is not formed with irregularities. The shaft of the graphite jig fixing pin is inserted through a hole surrounded by the support portion 21. As with the E-ring 10 in the first embodiment, a gap 20a communicating with the hole exists between both ends of the support portion 21. The C-shaped retainer 20 is expanded or contracted in the circumferential direction of the hole by the clearance 20a, and the diameter of the hole is changed. The holding portion 22 has a convex shape protruding toward the center of the C-shaped retainer 20 (hole).

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

Even if the C-shaped retainer ring 20 according to the present modification is used instead of the connector of the E-ring 10, the same effect as that of the first embodiment can be obtained. The stopper is not limited to the E-ring 10 and the C-ring 20, and an annular stopper such as a circular S-ring, a circular R-ring, or a beveled (bend 1) ring may be used.

Further, in the graphite jig fixing pins 100, 200, and 300 according to the present embodiment and the present modification, the region on the base end side of the groove 110 is cylindrical, but the region on the base end side of the groove 110 may be tapered.

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

Claims

1. An assembly connection tool for use in at least any one of positioning and assembling of electronic components, comprising:

a first jig having a recess formed in a predetermined surface and a first through-hole formed in a part of a bottom surface of the recess;

a second clamp having a second through hole; and

a connector fixing the first and second clamps to each other,

the connecting piece comprises a clamp fixing pin inserted through the first through hole and the second through hole; and a stopper engaged with the jig fixing pin in the recess,

the clip fixing pin has an insertion shaft and a head portion larger in diameter than the second through hole at a base end of the insertion shaft,

an annular groove is formed along the circumferential surface of the insertion shaft,

the stopper is a non-annular member that engages with the groove in a state that the stopper does not completely surround the groove in the circumferential direction,

the stopper is made of a metal material, and the allowable thrust load of the stopper is 70(N) to 500(N),

the jig fixing pin and the stopper satisfy the following equation (1),

Ly+Lz+Lt≤Lp＜Lx+Ly+Lz+Lt······(1)

wherein,

lp: a length from a base end of the insertion shaft to an end of the groove located on a front end side of the insertion shaft in a longitudinal direction of the insertion shaft,

lx: the length of the recess in the depth direction,

ly: a length of the first through-hole in a depth direction,

and Lz: a length of the second through-hole in a depth direction,

and Lt: a thickness of the stopper.

2. The assembly connecting tool according to claim 1, wherein:

the depth of the groove along the peripheral surface of the insertion shaft is 0.05mm or more and less than 0.3 mm.

3. The assembly connecting tool according to claim 1, wherein:

the insertion shaft is tapered toward the front end.

4. The assembly connecting tool according to claim 1, wherein:

the stopper has an inner diameter smaller than the diameter of the insertion shaft and falls within a range of a value obtained by subtracting 0.1mm from the diameter of the groove.

5. The assembly connection tool of claim 4, wherein:

6. The assembly connection tool of claim 4, wherein:

the insertion shaft is tapered toward the front end.

7. The assembly connecting tool according to claim 1, wherein:

the inner diameter of the stopper when engaged in the groove of the jig fixing pin is larger by 0.05mm to 0.3mm than the inner diameter of the stopper when not engaged in the groove of the jig fixing pin.

8. The assembly connection tool of claim 7, wherein:

9. The assembly connection tool of claim 7, wherein:

the insertion shaft is tapered toward the front end.