JP6838852B2 - Pipe fitting member - Google Patents

Description

The present invention relates to a pipe joint member.

The following Patent Document 1 discloses a pipe joint member. This pipe joint member is a pipe joint including a joint body having a fluid passage and a pipe insertion port and a cap for supporting the pipe holding member, both of which are referred to as polyphenylene sulfide resin (hereinafter referred to as "PPS resin"). ) Is formed. Then, Patent Document 1 below discloses that the PPS resin is blended with 30% by weight to 50% by weight of glass fibers.

Japanese Unexamined Patent Publication No. 2005-256914

If at least a part of the pipe joint member is made of resin, the weight of the pipe joint member can be expected to be reduced. On the other hand, the resin member is inferior in strength to the metal member. For this reason, for example, there is a concern that the pipe joint member may be broken (for example, cracked) when connected to a water supply device.

In this respect, in order to increase the strength and suppress the destruction of the pipe joint member, the resin material in which the glass fiber is mixed with the PPS resin is an effective material. As described above, Patent Document 1 discloses that the PPS resin is blended with glass fibers in an amount of 30% by weight to 50% by weight.

However, although Patent Document 1 discloses that the PPS resin is blended with glass fibers in an amount of 30% by weight to 50% by weight, the usual blending amount of glass fibers as a reinforcing material is simply shown. It's just that. That is, Patent Document 1 only shows the range of the blending amount of the glass fiber as a general standard range, and does not show the blending amount of the glass fiber that has been sufficiently examined from the viewpoint of breaking strength. ..

Against this background, the level of demand for fracture resistance of pipe joint members due to resinification has been increasing in recent years, and further studies are required at present.

Therefore, an object of the present invention is to provide a pipe joint member having further improved fracture resistance of a portion made of a resin material containing PPS resin and glass fiber.

The above problem is solved by the following means.

(1)
A pipe joint member made of a resin material containing at least a part of polyphenylene sulfide resin and 35% by mass to 45% by mass of glass fibers.

(2)
The pipe joint member according to (1), wherein the resin material contains the glass fiber in an amount of 37% by mass to 43% by mass.

(3)
The pipe joint member according to (1) or (2), wherein the polyphenylene sulfide resin is a linear polyphenylene sulfide resin.

(4)
The pipe joint member according to any one of (1) to (3), wherein the glass fiber is a short fiber.

(5)
The pipe joint member according to any one of (1) to (4), wherein the portion made of the resin material is injection-molded with the resin material.

(6)
Pipe fitting member body and
A threaded portion provided at one end in the axial direction of the pipe joint member body,
A polygonal torque input portion provided in the axial intermediate portion of the pipe joint member main body and having a plurality of tool contact surfaces into which torque is input in the circumferential direction.
The pipe joint member according to any one of (1) to (5).

(7)
The pipe joint member according to (6), wherein the torque input portion and a portion provided around the torque input portion are integrally formed of the resin material.

(8)
The pipe joint member according to (6), wherein the pipe joint member main body, the screw portion, and the torque input portion are integrally formed of the resin material.

(9)
The pipe joint member according to any one of (6) to (8), wherein the screw portion is a tapered male screw portion whose diameter gradually decreases toward the outer side in the axial direction of the pipe joint member main body.

According to the present invention, it is possible to provide a pipe joint member having further improved fracture resistance of a portion made of a resin material containing PPS resin and glass fiber.

It is a half-cut sectional view seen from the radial direction of the pipe joint member which concerns on embodiment of this invention. It is sectional drawing seen from the axial direction of the pipe joint member in the AA cutting line shown in FIG. It is a perspective view of the pipe joint member shown in FIG.

Hereinafter, the details of the pipe joint member of the present invention will be described.
In this specification, the numerical range indicated by "~" indicates a range in which the numerical values described before and after the numerical value are the minimum value and the maximum value, respectively.

The pipe joint member of the present invention is a resin material (hereinafter, also referred to as "specific resin material") containing at least a part of polyphenylene sulfide resin (PPS resin) and 35% by mass to 45% by mass of glass fiber. It is configured.

In the pipe joint member of the present invention, the above-mentioned structure further improves the fracture resistance of the portion made of the resin material. The reason for this is presumed to be the following reasons.

First, the PPS resin is a resin having excellent creep deformation resistance, heat resistance, and chemical resistance and high rupture strength. When glass fiber is blended with this PPS resin in an amount of 35% by mass, the breaking strength is increased. This is because, as a general knowledge, the blending amount of glass fiber as a reinforcing material is proportional to the breaking strength.

On the other hand, unlike the general knowledge, it was found that when the PPS resin contains an excessive amount of glass fiber of about 50% by mass, the breaking strength is lowered. This is presumed as follows.
When the glass fiber is injection-molded with PPS resin, the reinforcing effect of the glass fiber is reduced in the oriented portion where the glass fiber is oriented with respect to the load in the direction orthogonal to the orientation direction, so that the strength of the oriented portion is the bonding between the resins. It tends to depend on strength. If the glass fibers are excessively present in this oriented portion, the amount of PPS resin is reduced and the bonding area between the PPS resins is reduced. Therefore, it is presumed that if the PPS resin contains an excessive amount of glass fiber, the breaking strength is lowered.

On the other hand, it was found that when the glass fiber was blended with the PPS resin in an amount of 45% by mass or less, the breaking strength was increased. It is presumed that when the blending amount of the glass fiber is reduced to 45% by mass or less, the influence of the decrease in the bonding strength between the PPS resins is suppressed and the breaking strength is increased.

From the above, it is presumed that the pipe joint member of the present invention further improves the fracture resistance of the portion made of the resin material.

Hereinafter, the specific resin material constituting at least a part of the pipe joint member of the present invention will be described.

The specific resin material includes PPS resin and glass fiber. The specific resin material may contain other additives, if necessary.

The PPS resin is a polymer containing a repeating unit of −S—Ph— (where Ph = phenylene group).

Examples of the PPS resin include a linear type (linear type) PPS resin and a crosslinked type PPS resin. As the PPS resin, a linear type (linear type) PPS resin is preferable from the viewpoint of increasing the toughness of the pipe joint member and improving the fracture strength.
The crosslinked PPS resin is, for example, a PPS resin in which a phenylene group of a linear type (linear type) PPS resin is crosslinked via a single bond or an ether bond.

The specific resin material may contain a resin other than the PPS resin in the range of 5% by mass or less with respect to the entire resin component.

The glass fiber is preferably subjected to various surface treatments from the viewpoint of improving the adhesion with the PPS resin. When the adhesion between the glass fiber and the PPS resin is improved, the reinforcing effect can be enhanced.

The glass fiber may be a short fiber or a long fiber, but the short fiber is preferable from the viewpoint of improving the breaking strength of the pipe joint member. When the glass fiber is a short fiber, the orientation of the glass fiber is suppressed, and it becomes difficult for the glass fiber to be irregularly oriented in the resin. As a result, the breaking strength of the pipe joint member is likely to be improved.

When the glass fiber is a short fiber, the fiber length of the glass fiber is, for example, preferably 100 μm to 700 μm, more preferably 100 μm to 400 μmm. The fiber diameter of the glass fiber is, for example, preferably 5.0 μm to 9.5 μm, more preferably 7.5 μm to 9.5 μm.
The fiber length and fiber diameter of the glass fibers shall be arithmetic mean values measured for 100 glass fibers by microscopic observation. When the fiber has a flat shape or the like, the fiber diameter is (maximum diameter + minimum diameter) / 2.

The content of the glass fiber is 35% by mass to 45% by mass, and is preferably 37% by mass to 43% by mass from the viewpoint of improving the breaking strength of the pipe joint member. The content of the glass fiber is a ratio to the entire specific resin material.

Other additives include, for example, known additives for resin molded bodies such as fillers (fillers excluding glass fibers), lubricants, antistatic agents, surfactants, ultraviolet absorbers, antioxidants, and flame retardants. Can be mentioned.

In the pipe joint member of the present invention, the portion made of the specific resin material may be molded by, for example, molding, particularly injection molding. Even in the case of injection molding, by applying the specific resin material, the fracture strength at the oriented portion is increased as described above.
The specific resin material can be obtained by kneading the PPS resin and the glass fiber with, for example, a kneading machine or the like.

The pipe joint member of the present invention may be at least partially made of a specific resin material, but the entire pipe joint member is made of a specific resin material (that is, the entire pipe joint member is made of a specific resin material. It should be integrally molded).

Next, the structure of the pipe joint member of the present invention will be described.
The pipe joint member of the present invention is, for example, provided at a pipe joint member main body, a threaded portion provided at one end in the axial direction of the pipe joint member main body, and an axial intermediate portion of the pipe joint member main body, and torque is input. A pipe joint member including a polygonal torque input portion having a plurality of tool contact surfaces in the circumferential direction is preferably used. Then, at least a part of the pipe joint member of this structure is made of a specific resin material.
The pipe joint member of the present invention may be provided at the other end in the axial direction of the pipe joint member main body and may include a connecting portion connected to the pipe body.

In the pipe joint member of this structure, for example, in order to screw the screw portion into the pipe body, torque is input to the torque input portion by a tool such as a monkey wrench. The pipe joint member of this structure used in this way is required to have a breaking strength (particularly, tightening strength) as compared with the pipe joint member of other structures. Therefore, it is preferable that at least a part of the pipe joint member of this structure is made of a specific resin material because the fracture resistance (particularly, the tightening strength) is improved.

As described above, in the pipe joint member of this structure, since torque is input to the torque input portion, the portion provided around the torque input portion is liable to be damaged. Specifically, for example, a portion of the pipe joint member main body provided with the threaded portion (particularly, a portion of the pipe joint member main body on the torque input portion side provided with the threaded portion) is liable to be damaged. Therefore, from the viewpoint of improving the breaking strength of the portion provided around the torque input portion, the torque input portion and the portion provided around the torque input portion are integrally molded with a specific resin material. More preferably, the pipe joint member main body, the threaded portion, and the torque input portion are integrally formed of a specific resin material.

When the pipe joint member of this structure is provided with a connecting portion, the portion of the pipe joint member main body provided with the connecting portion (particularly, the portion of the pipe joint member main body on the torque input portion side provided with the connecting portion) is easily damaged. In particular, the part of the pipe joint member main body provided with the connecting part (for example, the part of the pipe joint member main body on the torque input part side where the connecting part is provided) is provided with a connecting part which is often composed of a thinner part than other parts. Easy to break. Therefore, from the viewpoint of improving the breaking strength of the portion provided around the torque input portion, the pipe joint member main body, the threaded portion, and the connecting portion (particularly, the pipe joint member on the torque input portion side where the connecting portion is provided). It is preferable that the portion of the main body) and the torque input portion are integrally molded with a specific resin material.

In the pipe joint member of this structure, the threaded portion can be a tapered male threaded portion. The tapered male thread portion has a shape in which the diameter gradually decreases toward the outer side in the axial direction of the pipe joint member main body.
Here, when the threaded portion is a tapered male threaded portion, if the pipe joint member of this structure is provided with a connecting portion, when torque is input to the torque input portion, the stress generated in the radial direction of the threaded portion is applied. It propagates to the connection portion that becomes the connection portion with the pipe body (particularly, the portion on the torque input portion side of the connection portion that comes into contact with the pipe body), and the connection portion is easily damaged. Even in this case, the fracture strength is improved by forming the part of the pipe joint member main body provided with the connection part (particularly, the part of the pipe joint member main body on the torque input part side where the connection part is provided) with a specific resin material. However, damage to the connection is suppressed.

Next, the pipe joint member according to the present embodiment, which is an example of the pipe joint member of the present invention, will be described with reference to the drawings. In the figure, reference numeral Ac appropriately indicated indicates an axial direction of the pipe joint member, and reference numeral Ca indicates a radial direction from the axial core of the pipe joint member toward the outer circumference.

(Structure of pipe joint member)
As shown in FIGS. 1 to 3, the pipe joint member 10 according to the present embodiment includes a pipe joint member main body 10A formed of a specific resin material. The pipe joint member main body 10A includes a first pipe connecting portion 12 sequentially arranged along the axial direction Ac, a torque input portion 14, and a second pipe connecting portion 16. In other words, the first pipe connecting portion 12 is provided at one end of the axial direction Ac of the pipe joint member main body 10A, and the second pipe connecting portion 16 is provided at the other end of the axial direction Ac. A torque input portion 14 is provided at an intermediate portion in the axial direction Ac of the pipe joint member main body 10A. In FIG. 1, the pipe joint member 10 connects the first pipe body 20 indicated by the alternate long and short dash line as the tubular body and the second tubular body 22 indicated by the alternate long and short dash line as the tubular body, and also connects the first tubular body. It is configured as a flow path for the fluid flowing between the 20 and the second pipe body 22. The fluid includes liquids such as water, hot water, oil and chemicals, and gases such as air and gas. In the present embodiment, the axial direction Ac is a straight line, but for example, the axial direction of the elbow-shaped, cheese-shaped, or curved pipe joint member is bent, branched, or curved. The pipe joint member having these shapes and axial directions is included in the pipe joint member 10 according to the present invention. Further, the first tubular body 20 is not limited to a tubular body such as a metal tube. The first pipe body 20 includes other joints, faucet fixtures, water heaters, water heaters, and other members to be connected in the construction of general water supply and hot water supply pipes.

In the present embodiment, since the pipe joint member main body 10A is formed of the specific resin material, naturally, the first pipe connecting portion 12, the torque input portion 14, and the second pipe connecting portion 16 are formed of the specific resin material. There is. More specifically, the first pipe connecting portion 12, the torque input portion 14, and the second pipe connecting portion 16 are integrally molded by a molding method using a resin molding die.

The first pipe connecting portion 12 of the pipe joint member 10 has a hollow cylindrical shape. The pipe interior 12A of the first pipe connecting portion 12 is configured as a flow path through which a fluid flows in the axial direction, and the outer peripheral portion of the first pipe connecting portion 12 is a screw portion 12B screwed into the first pipe body 20 (see FIG. 1). It is said that. The diameter of the threaded portion 12B is slightly increased from the first tubular body 20 side toward the torque input portion 14 side, and is composed of a tapered screw.

The torque input portion 14 is provided on the side of the first pipe connecting portion 12 opposite to the first pipe body 20 side, and has a hollow polygonal tubular shape in which the shaft core of the first pipe connecting portion 12 and the shaft core are aligned with each other. ing. The pipe interior 14A of the torque input unit 14 communicates with the pipe interior 12A of the first pipe connecting portion 12, and is configured as a fluid flow path. Further, the pipe internal 14A has a tapered shape whose diameter is reduced from the first pipe connecting portion 12 side toward the second pipe connecting portion 16 side. A plurality of tool contact surfaces 14B for inputting torque for screwing the first pipe connecting portion 12 into the first pipe body 20 by a tool are provided on the outer periphery of the torque input portion 14 along the circumferential direction. In the present embodiment, the tool contact surfaces 14B are configured as rectangular surfaces having the circumferential direction in the longitudinal direction and the axial direction Ac in the lateral direction, and six of them are arranged in the circumferential direction. As shown in FIGS. 2 and 3, the contour shape of the torque input unit 14 is formed by a hexagonal shape when viewed from the axial direction Ac, similar to the contour shape of the hexagon nut and the contour shape of the hexagon bolt head.

A corner portion 14C is provided between one tool contact surface 14B and another tool contact surface 14B adjacent in the circumferential direction at the circumferential end of the tool contact surface 14B. As shown in FIG. 2, the internal angle α of the corner portion 14C is set to 120 degrees here. Further, as shown in FIGS. 1 and 3, chamfered portions 14D are provided at both ends of the corner portion 14C in the axial direction Ac.

As shown in FIGS. 1 and 3, the second pipe connecting portion 16 is provided on the side of the torque input portion 14 opposite to the first pipe connecting portion 12 side, and connects the shaft core and the shaft core of the torque input unit 14. It has a matching hollow cylinder shape. The pipe interior 16A on the torque input portion 14 side of the second pipe connecting portion 16 has a tapered shape that communicates with the pipe interior 14A of the torque input portion 14 and is continuously reduced in diameter to the pipe interior 14A. The pipe inner 16B located at the intermediate portion of the second pipe connecting portion 16 in the axial direction Ac is communicated with the pipe inner 16A and has the same diameter along the axial direction Ac. The pipe inner 16C on the second pipe 22 side of the second pipe connecting portion 16 communicates with the pipe inner 16B and has a tapered shape whose diameter is increased from the pipe inner 16B toward the second pipe 22. The inside of the pipe 16A, the inside of the pipe 16B, and the inside of the pipe 16C are configured as a fluid flow path.

As shown in FIG. 1, the second pipe body 22 is inserted and connected to the outer peripheral portion of the second pipe connecting portion 16. On the outer circumference of the connecting portion 16D on the torque input portion 14 side, a positioning portion 16E whose diameter is expanded and which abuts on the end of the second tubular body 22 to position the end is provided. A groove portion 16F whose diameter is reduced and arranged along the circumferential direction is provided in the middle portion of the connecting portion 16D in the axial direction Ac. Although not limited to the number of arrangements, here, two groove portions 16F are provided so as to be separated from each other in the axial direction Ac. An O-ring 26 indicated by a broken line is fitted in the groove portion 16F, and the O-ring 26 is configured to enhance the airtightness or watertightness between the connecting portion 16D and the second pipe body 22. A press-fitting portion 16G is provided between the torque input portion 14 and the positioning portion 16E of the second pipe connecting portion 16. The press-fitting portion 16G has a tapered shape whose diameter is increased from the positioning portion 16E toward the torque input portion 14.

As shown in FIG. 1, the second pipe connecting portion 16 is made of resin shown by an imaginary line around the second pipe body 22 from the intermediate portion of the connecting portion 16D in the axial direction Ac to the press-fitting portion 16G. The tubular body 24A is provided. One end of the tubular body 24A on the torque input portion 14 side is press-fitted into the press-fitting portion 16G, and the other end of the tubular body 24A is configured to surround the outer circumference of the second tubular body 22. Further, at the end of the connecting portion 16D in the axial direction Ac, a resin release ring 24B indicated by an imaginary line is provided around the second tubular body 22, and a lock ring is provided between the tubular body 24A and the release ring 24B. 24D is provided. Further, a resin cap 24C shown by an imaginary line is provided around the tubular body 24A and the release ring 24B. In the pipe joint member 10 according to the present embodiment, the O-ring 26, the second pipe body 22, and the like are assembled in advance before construction.

In the pipe joint member 10 configured in this way, as shown in FIGS. 1 to 3, the tool contact surface 14B of the torque input unit 14 is provided with a recess 30 recessed from the tool contact surface 14B in the radial direction Ca. Has been done. In the present embodiment, the recess 30 is composed of a long groove 32 and a long groove 34 whose circumferential direction is the longitudinal direction and the axial direction Ac is the lateral direction. More specifically, the recess 30 is configured with, on each of all (six) tool contact surfaces 14B, two elongated grooves 32 and elongated grooves 34 arranged axially spaced apart from each other and parallel to each other. .. The groove length and groove width of each of the long groove 32 and the long groove 34 are set to the same dimensions.

When torque is input to the torque input portion 14 by the tool, the recess 30 has a tool at the corner portion 14C of the tool contact surface 14B before at least one of the first pipe connecting portion 12 and the second pipe connecting portion 16 is damaged. It is configured to be damaged by 40. Here, the breakage is a state in which the corner portion 14C is crushed or licked by the tool 40, and the tool 40 is not applied to the corner portion 14C.

(Construction of resin molding mold)
Here, the contour shape of the resin molding die (die) 50 used for manufacturing the pipe joint member 10 is shown as an imaginary line in FIG. In the present embodiment, the resin molding die 50 is the first molding die 52 that forms a half portion along the axial direction Ac of the pipe joint member 10 including the three tool contact surfaces 14B of the torque input portion 14. The second molding die 54 for molding the other half portion of the pipe joint member 10 including the other three tool contact surfaces 14B is provided. In the present embodiment, the parting line 56, which is the boundary between the first molding die 52 and the second molding die 54, is positioned so that the corner portions 14C face each other. In the resin molding method, a specific resin material having fluidity is injected into the cavity formed by the first molding die 52 and the second molding die 54, and the specific resin material is cured to cure the pipe joint member 10. Is molded. In the present embodiment, as shown in FIGS. 1 and 2, the resin injection port of the resin molding die 50 is located at a position corresponding to one corner portion 14C along the parting line 56 of the torque input portion 14. The injection gate 58 is provided.

As shown in FIG. 2, the flow R of the specific resin material is divided into upper and lower halves from the injection gate 58 around the inside 14A of the pipe when viewed from the axial direction Ac, and then combined into one. This combined and hardened portion is the weld portion WL, and as shown by the alternate long and short dash line, the weld portion WL is formed along the radial Ca of the torque input portion 14. The weld portion WL is formed on the opposite side of the position of the injection gate 58 via the inside 14A of the pipe. Since the portion where the weld portion WL is formed is the corner portion 14C and the corner portion 14C is the region 36 as described above, the recess 30 is not provided in the region 36.

Further, since the pipe joint member 10 is molded by the resin molding die 50, as shown in FIG. 2, the inner walls 30B to 30E, 30H to along the lateral direction (axial direction Ac) of the elongated groove 32 and the elongated groove 34. The surface direction of 30K coincides with the mold release direction Ma of the resin molding die 50. This makes it possible to release the mold without getting caught in the resin molding mold 50. In addition, the surface directions of the inner walls 30A, 30F, 30G, and 30L along the lateral direction of the long groove 32 and the long groove 34 are orthogonal to the mold release direction Ma.

Here, in the pipe joint member 10 of the above embodiment, the pipe joint member main body 10A, the first pipe connecting portion 12 whose outer peripheral portion is configured as a threaded portion 12B, the torque input portion 14, and the outer peripheral portion are connected. The second pipe connecting portion 16 configured as the portion 16D is integrally molded with a specific resin material. However, the present invention is not limited to this, and for example, the torque input unit 14 and the portions provided around the torque input unit 14 (specifically, the torque input unit and the outer peripheral portion are configured as the screw portion 12B). The first pipe connecting portion 12 or a part of the second pipe connecting portion 16 in which the first connecting portion 12 and the outer peripheral portion are formed as a press-fitting portion 16D) are integrally molded with a specific resin material. You may.

The pipe joint member of the present invention is not limited to the pipe joint member 10 of the above embodiment, and can be variously changed as long as the gist thereof is not deviated.

Hereinafter, the present invention will be described in more detail with reference to examples. However, each of these examples does not limit the present invention.

(Examples 1 and 2, Comparative Examples 1 and 3)
The pellets (resin material) containing PPS resin and glass fiber shown in Table 1 were prepared. Next, using pellets (resin material), injection molding was performed by an injection molding machine under the conditions of an injection temperature of 330 ± 10 ° C. and a mold temperature of 140 ± 10 ° C., and a pipe joint having the structure shown in FIGS. The member was molded.

(Evaluation)
The obtained pipe joint member was subjected to a tightening strength test. Specifically, by inputting torque from the torque input part, when the threaded part of the pipe joint member is screwed into the pipe body, the torque at which the pipe joint member is broken (cracked) is measured for tightening. A strength test was performed. The results are shown in Table 1.

The details in Table 1 are as follows.
-PPS resin-
-Resin (1): Linear type (linear type) PPS resin "Product name Durafide (manufacturer: Polyplastics Co., Ltd.)
-Resin (2): Linear type (linear type) PPS resin "Product name Plastron (manufactured by Daicel Polymer Co., Ltd.)
-Glass fiber-
・ Fiber (1): short glass fiber ・ Fiber (2): long glass fiber

From the above results, it can be seen that the tightening strength of Examples 1 and 2 in which the pipe joint member is made of a resin material containing 40% by mass of glass fiber in PPS resin is higher than that of Comparative Example. In the tightening strength test, in Comparative Examples 1 to 3, damage was observed in the oriented portion of the pipe joint member.
As a result, it can be seen that the pipe joint member of the present invention has improved fracture strength.

10 Pipe fitting member 10A Pipe fitting member body 12 First pipe connecting part 12B Threaded part 14 Torque input part 14B Tool contact surface 14C Square part 16 Second pipe connecting part 16D Connection part 16G Press-fitting part 30 Recessed part 32, 34 Long groove 50 Resin molding Mold

Claims (5)

Pipe fitting member body and
A threaded portion provided at one end in the axial direction of the pipe joint member body,
A polygonal torque input portion provided in the axial intermediate portion of the pipe joint member main body and having a plurality of tool contact surfaces into which torque is input in the circumferential direction.
With
At least a part is composed of a resin material containing polyphenylene sulfide resin and 35% by mass to 45% by mass of glass fiber.
The portion made of the resin material is injection-molded with the resin material, and the weld portion is formed in the radial direction from the apex of the corner portion of the torque input portion toward the center of the pipe joint member.
A pipe joint member in which the glass fiber is a short fiber and the fiber length of the short fiber is 100 μm to 700 μm. The pipe joint member according to claim 1, wherein the resin material contains the glass fiber in an amount of 37% by mass to 43% by mass. The pipe joint member according to claim 1 or 2, wherein the polyphenylene sulfide resin is a linear polyphenylene sulfide resin. The pipe joint member according to any one of claims 1 to 3, wherein the pipe joint member main body, the screw portion, and the torque input portion are integrally formed of the resin material. The pipe joint member according to any one of claims 1 to 4, wherein the threaded portion is a tapered male screw portion whose diameter gradually decreases toward the outside in the axial direction of the pipe joint member main body.

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