JP6147297B2 - Piping connection structure - Google Patents

Description

  The present invention relates to a pipe connection structure for detachably connecting a pipe to a mating member.

Conventionally, piping is composed of a hose body and a pipe joint attached to the hose body, and the eyeglass body provided for the pipe joint is assembled with a perforated bolt on a pipe holder provided on a mating member such as a master cylinder. A pipe connection structure is disclosed (for example, see Patent Document 1).
The perforated bolt has a fluid passage formed therein, and is screwed to a female screw of a bolt hole formed in the pipe holder through the spectacle body and washers disposed at both ends of the spectacle body. ing.

Japanese Utility Model Publication No. 59-137889

In Patent Document 1, a pipe joint having a perforated bolt having a fluid passage formed therein and an eyeglass body in which an insertion hole through which the perforated bolt is passed has a problem of high cost.
The objective of this invention is providing the piping connection structure which can reduce cost.

In order to solve the above-described problem, the present invention removably connects the pipe (10, 60) to the mating member (11, 31, 41), thereby allowing fluid to flow between the pipe (10, 60) and the mating member. (11, 31, 41) In the pipe connection structure that circulates between the fluid passages (11e), the pipe (10, 60) has a hose body (21) and a flange (22c, 62c at the tip). ) And a pipe joint (22, 62) attached to the end of the hose body (21). The pipe (10, 60) is connected to the mating member (11, 31). 41) with fastening members (12, 45, 52), and the fastening members (12, 45, 52) are inserted through holes (12c, 45c, 52c) through which the flanges (22c, 62c) pass. Mating member (11, 31, 41 Threaded portions (12g, 45d) that are screw-coupled to each other, and are arranged on the inner peripheral surface of the insertion holes (12c, 45c, 52c) at intervals in the circumferential direction and project inward in the radial direction. A plurality of protrusions (12e, 45e, 52k) and notches (12m, 52d) located between the protrusions (12e, 45e, 52k) adjacent in the circumferential direction are formed, and the flanges (22c, 62c ) are formed. ) Is inserted into the fastening member (12, 45, 52) obliquely from between the notches (12m, 52d) facing each other or along the axial direction of the fastening member (12, 45, 52). The flanges (22c, 62c) are formed by tightening the projecting portions (12e, 45e, 52k) to the mating member (11, 31, 41) side by the end surface on the mating member (11, 31, 41) side. Fluid Characterized in that connected to said fluid passage hole (22 d) of the mating member (11,31,41) (11e).

In the above-described configuration, the flange (62c) is formed with a plurality of notches (62d) recessed radially inward at an outer peripheral edge thereof at intervals in the circumferential direction, and the plurality of notches (62d) Each notch (62d) of the flange (62c) is formed at a position corresponding to each of the plurality of protrusions (12e) of the fastening member (12), and each protrusion (12e) of the fastening member (12). And the flange (62c) may be inserted into the fastening member (12) along the axial direction of the fastening member (12) .
Moreover, the said structure WHEREIN: The said protrusion part (12e) of the said fastening member (12) extends in the axial direction of the said fastening member (12), and the one end surface by the side of the said counterpart member (11) of the said protrusion part (12e) (12h) is not good be located in the middle portion of the length of the fastening member (12).

In the above configuration, the mating member (11, 31, 41) includes a pressing surface (11g) pressed by the flange (22c, 62c) and the fluid passage (opened in the pressing surface (11g)). 11e) and cylindrical portions (11b, 31b, 41b) formed so as to surround the pressing surface (11g), and the fastening members (12, 45, 52) are provided on the cylindrical portions (11b, 31b, 41b). ) May be screwed together.
Further, in the above configuration, sealing washers (13, 33) may be provided between the flanges (22c, 62c) and the pressing surface (11g).

  The pipe of the present invention comprises a hose body and a pipe body having a flange formed at the tip and a pipe joint attached to the end of the hose body, and has an insertion hole through which the flange of the pipe joint is inserted. By tightening the flange to the mating member side at the opening edge of the insertion hole of the fastening member screwed to the member, the fluid flow hole formed in the flange is connected to the fluid passage of the mating member. This eliminates the need for a pipe joint with a perforated bolt with a brake fluid passage formed inside or a spectacle body with an insertion hole through which a perforated bolt is inserted, and without a loss of sealing performance. Cost can be reduced.

In addition, since the protrusion that protrudes radially inward is provided in the insertion hole of the fastening member and the flange is tightened at the opening edge of the protrusion, the flange is inserted from the insertion hole of the fastening member while avoiding the protrusion, It is not necessary to assemble the fastening member in advance in the pipe, and the degree of freedom of the piping work can be increased. Further, since the fastening member is separate from the pipe, the number of replacement parts can be reduced when replacing the fastening member or the pipe.
Also, since the flange has a notch that corresponds to the protrusion, align the notch of the flange with the protrusion of the insertion hole, insert the flange into the insertion hole, and insert the flange between the protrusion and the notch. By shifting the directional position, it is possible to tighten the portion other than the notch of the flange with the protruding portion, and the piping can be easily connected.

  Also, a notch that allows the flange to be inserted is formed in the insertion hole of the fastening member, and the flange is tightened at the opening edge around the notch of the insertion hole, so that the flange is inserted into the insertion hole through the notch Therefore, it is not necessary to assemble the fastening member to the pipe in advance, and the degree of freedom of the piping work can be increased. Further, since the fastening member is separate from the pipe, the number of replacement parts can be reduced when replacing the fastening member or the pipe.

The mating member includes a pressing surface pressed by the flange, a fluid passage opened in the pressing surface, and a cylindrical portion formed so as to surround the pressing surface, and the fastening member is screwed to the cylindrical portion. Therefore, as a structure in which the flange is inserted into the cylindrical portion, the flange can be easily positioned, and the pipe connection work can be easily performed.
In addition, since a washer for sealing is provided between the flange and the pressing surface, it can be sealed with a single sealing washer, and the number of washers can be reduced as compared with the conventional pipe connection structure. Cost can be reduced.

It is a disassembled perspective view which shows the piping connection structure of 1st Embodiment which concerns on this invention. It is a perspective view which shows the state by which the pipe connection structure was connected. It is a longitudinal section showing the connected state of the pipe connection structure. It is a cross-sectional view which shows the fastening state of the pipe joint by a volt | bolt member. It is an action figure which shows the connection point which connects piping to a counterpart member, and Drawing 5 (A)-Drawing 5 (F) are action views showing each connection process. It is principal part sectional drawing which shows the connected state of the piping connection structure of 2nd Embodiment. It is principal part sectional drawing which shows the connected state of the piping connection structure of 3rd Embodiment. It is explanatory drawing which shows the piping connection structure of 4th Embodiment, FIG. 8 (A) is a cross-sectional view of the pipe joint which shows the pipe part and flange of piping, FIG.8 (B) is a top view which shows a bolt member, FIG. 8 (C) is a plan view showing a state in which the flange is fastened with a bolt member. It is explanatory drawing which shows the piping connection structure of 5th Embodiment, FIG. 9 (A) is a cross-sectional view of the pipe joint which shows the pipe part and flange of piping, FIG.9 (B) is a top view which shows a bolt member, FIG. 9 (C) is a plan view showing a state in which the flange is fastened with a bolt member.

Hereinafter, each embodiment of the present invention will be described with reference to the drawings.
<First Embodiment>
FIG. 1 is an exploded perspective view showing a pipe connection structure according to the first embodiment of the present invention.
The pipe 10 is connected to the mating member 11 by a bolt member 12, and fluid (liquid, gas) is circulated between the pipe 10 and the mating member 11. Reference numeral 13 denotes a sealing washer disposed between the pipe 10 and the mating member 11. Examples of the pipe 10 include a brake hydraulic pipe that constitutes a vehicle brake device, but other pneumatic pipes and hydraulic pipes may be used.
The pipe 10 includes a rubber hose body 21 and a pipe joint 22 attached to one end of the hose body 21. Reference numeral 21a denotes a brake fluid passage of the hose body 21 through which the brake fluid flows.
The pipe joint 22 includes a caulking part 22a that is caulked to the hose body 21, a pipe part 22b that extends from the caulking part 22a in the axial direction of the pipe joint 22, and a flange 22c that is provided at the tip of the pipe part 22b. It is integrally formed. The flange 22 has a circular outer shape and is formed in a donut-shaped plate shape.

The mating member 11 includes a cylindrical portion 11b that protrudes integrally from the base portion 11a and is screwed to the bolt member 12, and a bottom wall 11c that forms the bottom of the cylindrical portion 11b. The cylindrical portion 11b has a female thread 11d formed on its inner peripheral surface 11f. The bottom wall 11c has a brake fluid hole 11e through which brake fluid flows. Reference numeral 11g denotes a bottom surface of the bottom wall 11c.
The bolt member 12 includes a hexagonal head portion 12a on which a wrench or the like is hung, and a shaft portion 12b (see FIG. 3) protruding from the head portion 12a. The head member 12a and the shaft portion 12b are connected to the flange of the pipe joint 22. A joint insertion hole 12c through which 22c passes is formed.
The joint insertion hole 12c has a plurality of projecting portions 12e, which are located at equal intervals in the circumferential direction and project inward in the radial direction, extending in the axial direction of the bolt member 12 on the inner circumferential surface 12d.
The washer 13 has a brake fluid hole 13a through which brake fluid flows in the center thereof.

In the pipe connection structure of the present embodiment, the structures of the pipe joint 22 and the bolt member 12 of the pipe 10 are simplified and the connection method is changed as compared with the conventional pipe connection structure.
Specifically, the pipe joint 22 has a simple structure in which a flange 22c is provided at the tip of the pipe portion 22b. Moreover, the bolt member 12 has a simple structure in which the joint insertion hole 12c passes through the head portion 12a and the shaft portion 12b, and a plurality of protrusions 12e are provided on the inner peripheral surface of the joint insertion hole 12c. With such a structure, the cost of the pipe connection structure is reduced.
The connection method will be described in detail below.

2 is a perspective view showing a connected state of the pipe connection structure, and FIG. 3 is a longitudinal sectional view showing a connected state of the pipe connection structure. The dashed-dotted line shown in FIG. 3 has shown the axis line 10a of the pipe connection structure. The pipe joint 22, the bolt member 12, and the mating member 11 extend along the axis 10a. The direction in which the axis 10a extends is the axial direction of each of the pipe joint 22, the bolt member 12 (fastening member), and the counterpart member 11 (the same applies to other embodiments).
As shown in FIG. 2, the pipe 10 is connected to the mating member 11 with the flange 22 c of the pipe 10 being fastened to the bolt member 12.

As shown in FIG. 3, the bolt member 12 is formed on the outer peripheral surface 12f of the shaft portion 12b with a male screw 12g that is formed on the inner peripheral surface 11f of the cylindrical portion 11b of the mating member 11 and is coupled to the screw 11d. ing.
Further, the bolt member 12 has an end surface 12h on the counterpart member 11 side of the protruding portion 12e positioned on the head 12a side with respect to the end surface 12j of the shaft portion 12b. Reference symbol L1 denotes the length of the protruding portion 12e in the axial direction, and L2 denotes an axial step amount (distance) between the end surface 12j of the shaft portion 12b and the one end surface 12h of the protruding portion 12e. Here, the one end face 12h and the end face 12j may be formed on the same plane. In this case, L2 = 0.

A washer 13 is disposed on the bottom surface 11g of the bottom wall 11c in the cylindrical portion 11b of the mating member 11, and a flange 22c provided on the pipe joint 22 of the pipe 10 is applied on the washer 13, and the flange 22c is a bolt. The bolt member 12 is screwed to the cylindrical portion 11 b of the mating member 11 while being pressed against the one end surface 12 h of the protruding portion 12 e of the member 12.
The inner diameter of the joint insertion hole 12c of the bolt member 12 is slightly larger than the outer diameter of the flange 22c, and the outer diameters of the flange 22c and the washer 13 are equal or substantially equal.
By connecting the pipe 10 to the mating member 11, the brake fluid passage 21a of the hose body 21, the brake fluid passage 22d in the pipe joint 22, the brake fluid hole 13a of the washer 13, and the brake fluid hole 11e of the mating member 11 communicate with each other. Brake fluid can be distributed.
The space between the bottom wall 11c and the washer 13 and the space between the washer 13 and the flange 22c are sealed.

The caulking portion 22a of the pipe joint 22 is integrally formed from an inner cylinder 22e provided so as to be continuous with the pipe portion 22b and an outer cylinder 22f extending from the inner cylinder 22e and disposed so as to surround the inner cylinder 22e. Has been.
The hose body 21 is inserted between the inner cylinder 22e and the outer cylinder 22f, the outer cylinder 22f is compressed radially inward, and the hose body 21 is crimped to the pipe joint 22.

FIG. 4 is a transverse cross-sectional view showing a tightened state of the pipe joint 22 by the bolt member 12, and corresponds to a cross section taken along line IV-IV in FIG.
The flange 22c of the pipe joint 22 has a circular outer shape, and is a joint insertion hole 12c of the bolt member 12, more specifically, a portion where the plurality of protrusions 12e are not provided in the joint insertion hole 12c, and the shafts with respect to the plurality of protrusions 12e. It is located on the opposite member 11 side in the direction and is fitted into an end insertion hole 12k (see also FIG. 3) that constitutes an end of the joint insertion hole 12c.
The protrusions 12e of the bolt member 12 are arranged at equal intervals at an angle θ in the circumferential direction on the inner peripheral surface 12d of the joint insertion hole 12c. Thus, by arranging the protrusions 12e at equal intervals in the circumferential direction, the flange 22c can be more uniformly pressed by the plurality of protrusions 12e, and the sealing performance can be improved.
In FIG. 4, the protrusions 12e are formed at three locations, but the number of protrusions 12e is not limited to this.

  In the inner peripheral surface 12d of the joint insertion hole 12c, a portion where the plurality of protruding portions 12e are not formed, that is, a portion between the adjacent protruding portions 12e and 12e can be said to be a recess or a notch with respect to the protruding portion 12e. If this portion is defined as a notch 12m, a flange 22c is inserted between adjacent notches 12m and 12m when the pipe 10 is connected to the mating member 11 (see FIG. 3). The insertion procedure of the flange 22c will be described in detail with reference to FIG.

A connection procedure for connecting the pipe 10 described above to the mating member 11 will be described below.
FIG. 5 is an operation diagram illustrating a connection procedure for connecting the pipe 10 to the mating member 11, and FIGS. 5A to 5F are operation diagrams illustrating each connection process.
FIG. 5A shows the mating member 11.
As shown in FIG. 5 (B), the washer 13 is placed on the bottom surface 11g (see FIG. 5 (A)) of the bottom wall 11c (see FIG. 5 (A)) in the cylindrical portion 11b of the counterpart member 11.
As shown in FIG. 5C, the bolt member 12 is attached to the cylindrical portion 11b of the counterpart member 11, and the male screw 12g (see FIG. 3) of the bolt member 12 is the female screw 11d of the cylindrical portion 11b (see FIG. 5B). ) And screw it together so that it takes a little.

As shown in FIG. 5 (D), the tip end portion (pipe portion 22b and flange 22c) of the pipe joint 22 in the pipe is inside the joint insertion hole 12c of the bolt member 12 (specifically, between adjacent notches 12m and 12m). The flange 22c is moved between the protrusion 12e of the bolt member 12 and the washer 13 as shown by an arrow A in FIG.
And the pipe joint 22 is corrected to the attitude | position shown in FIG.5 (E) so that it may extend in the axial direction of the bolt member 12. FIG. Accordingly, the flange 22c is disposed between all of the plurality of protruding portions 12e and the washer 13. (That is, the flange 22c is disposed in the end insertion hole 12k.)

Next, in FIG. 5E, as indicated by an arrow B, a tool is put on the head 12 a of the bolt member 12 and turned to screw the bolt member 12 into the mating member 11. As a result, the bolt member 12 moves so as to approach the counterpart member 11 side as indicated by an arrow C while being screw-coupled to the cylindrical portion 11b.
Then, as shown in FIG. 5 (F), one end surface 12h of each projecting portion 12e of the bolt member 12 hits the flange 22c, and the flange 22c is tightened. This completes the connection of the pipe 10 to the mating member 11.

The pipe connection method shown in FIGS. 5A to 5F is different from the connection method of the conventional pipe connection structure.
Specifically, conventionally, the perforated bolt is passed through the pipe joint, such as connecting the spectacle body of the pipe joint to the pipe holding bracket with the perforated bolt. Therefore, the pipe joint is provided with a spectacle body through which the perforated bolt is passed, and the perforated bolt is formed with a fluid passage through which fluid flows between the spectacle body side and the pipe holding metal fitting side. That is, the fluid flows through the perforated bolt. For this reason, the structure of a pipe joint and a perforated bolt becomes complicated. Further, since it is necessary to seal both ends of the eyeglass body, a plurality of sealing washers are required. These increase costs. Furthermore, since the shape of the fluid passage of the spectacle body and the perforated bolt and the cross-sectional area of the fluid passage are restricted, they are easily affected by pressure loss and the like.

  On the other hand, in this embodiment, the pipe joint 22 is passed through the bolt member 12. Therefore, the brake fluid passage 22d of the pipe joint 22 that passes through the bolt member 12 can be directly connected to the brake fluid hole 11e side of the counterpart member 11. As a result, the brake fluid passage is sealed only between the flange 22c and the counterpart member 11. Further, the flange 22c is fastened by one end surface 12h which is an opening edge of the protruding portion 12e formed in the joint insertion hole 12c of the bolt member 12. For this reason, it is only necessary to provide the pipe joint 22 with a flange 22c having a simple shape. Moreover, the bolt member 12 also has only to form the joint insertion hole 12c in the axial direction and form the protruding portion 12e on the inner peripheral surface of the joint insertion hole 12c. Further, only one sealing washer 13 may be used. Further, since the pipe joint 22 side and the mating member 11 side can be directly connected, the pipe connection structure does not affect the flow of brake fluid and the pressure transmission.

Further, in the structure in which the flange of the pipe joint is connected to the mating member as in this embodiment, the fastening member such as the bolt member or the nut member is incorporated in the pipe joint so as not to be removed, and the flange is tightened with the fastening member. A piping structure connected to a member is conventionally known.
In this piping structure, when the piping is replaced, the fastening member is also replaced, so that the number of replacement parts increases. On the other hand, in the pipe connection structure of the present embodiment, the bolt member is configured separately from the pipe, so the number of replacement parts is reduced.

Second Embodiment
FIG. 6 is a cross-sectional view of a main part showing a connected state of the pipe connection structure of the second embodiment. The same components as those in the first embodiment shown in FIG.
The pipe 10 is connected to the mating member 31 while the flange 22c of the pipe 10 is pressed against the plurality of protrusions 12e of the bolt member 12.
The mating member 31 includes a cylindrical portion 31b that protrudes integrally from the base portion 11a and is screwed to the bolt member 12, and a bottom wall 11c that forms the bottom of the cylindrical portion 31b. The cylindrical portion 31b has a female screw 31d formed on a part of its inner peripheral surface 31e.

In the mating member 31, the formation range of the female screw 31d is different from the formation range of the female screw 11d (see FIG. 3) of the mating member 11 (see FIG. 3). That is, the female screw 31d is not formed in the vicinity of the bottom wall 11c of the inner peripheral surface 31e, but is formed shorter in the axial direction of the mating member 31 than the female screw 11d.
A washer 33 that seals between the bottom wall 11c and the flange 22c is disposed on the bottom wall 11c. The washer 33 has an outer diameter slightly smaller than the inner diameter of the inner peripheral surface 31e of the cylindrical portion 31b and larger than the outer diameter of the flange 22c, and the washer 33 is fitted in the cylindrical portion 31b. With such a structure, the washer 33 can be easily positioned.

<Third Embodiment>
FIG. 7 is a cross-sectional view of a main part showing a connected state of the pipe connection structure of the third embodiment. The same components as those in the first embodiment shown in FIG.
The pipe 10 is connected to the mating member 41 with a nut member 45.
The mating member 41 includes a cylindrical portion 41b that protrudes integrally from the base portion 11a and is screwed to the nut member 45, and a bottom wall 11c that forms the bottom of the cylindrical portion 41b. As for the cylinder part 41b, the screw | thread 41d is formed in the outer peripheral surface 41f.
The washer 13 and the flange 22c are fitted to the inner peripheral surface 41e of the cylindrical portion 41b.
The nut member 45 includes a joint insertion hole 45c opened for passing the pipe portion 22b and the flange 22c of the pipe 10, and a large-diameter hole 45j adjacent to the joint insertion hole 45c and having an inner diameter larger than that of the joint insertion hole 45c. And a hexagonal hexagonal surface 45f on which a tool such as a wrench is hung.

The joint insertion hole 45c has a plurality of projecting portions 45e that are located at equal intervals in the circumferential direction and project inward in the radial direction and extend in the axial direction of the nut member 45 on the inner circumferential surface 45g.
The large-diameter hole 45j has a female screw 45d formed on the inner peripheral surface 45k thereof, and the female screw 45d is screwed to the male screw 41d of the mating member 41.
When the nut member 45 is tightened against the cylindrical portion 41b of the mating member 41, the projecting portion 45e presses the flange 22c with its one end face 45h.
Thus, by using the nut member 45, the washer 13 and the flange 22c can be easily positioned in the cylindrical portion 41b with respect to the counterpart member 41, and workability at the time of pipe connection can be improved. .

<Fourth embodiment>
FIG. 8 is an explanatory view showing a pipe connection structure of the fourth embodiment. 8A is a cross-sectional view of the pipe joint 22 showing the pipe portion 22b and the flange 22c of the pipe 10, FIG. 8B is a plan view showing the bolt member 52, and FIG. It is a top view which shows the state which clamped 22c. In addition, the same code | symbol is attached | subjected about the same structure as 1st Embodiment shown in FIG. 4, and detailed description is abbreviate | omitted.
As shown in FIGS. 8A and 8B, the bolt member 52 includes a hexagonal head 52a on which a wrench or the like is hung, and a shaft portion 52b that integrally projects from the head 52a. And the joint insertion hole 52c which lets the flange 22c of the pipe joint 22 pass is opened in the shaft part 52b.

The shaft portion 52b has a male screw 12g (see FIG. 3) formed on the outer peripheral surface 52p of the shaft portion 52b.
The joint insertion hole 52c includes a small-diameter hole 52e in which a plurality of notches 52d are formed at equal intervals in the circumferential direction, an inner diameter larger than that of the small-diameter hole 52e, and adjacent to the small-diameter hole 52e. And a large-diameter hole 52f provided in.
The pair of opposed notches 52d are arranged at an interval of 180 ° in the circumferential direction.
The inner peripheral surface 52g of the large-diameter hole 52f has an inner diameter that is greater than or equal to the diameter of a virtual circle that is in contact with the bottoms of the plurality of notches 52d.
A plurality of projecting portions 52k projecting radially inward from the large diameter hole 52f are formed between the adjacent notches 52d and 52d at the edge of the small diameter hole 52e.

In order to connect the pipe 10 to the mating member 11 (see FIG. 3) with the bolt member 52, first, as shown in FIG. 5D, the tip of the pipe 10 is inclined and the flange 22c is connected to the bolt member. 52 is inserted between a pair of notches 52d and 52d facing each other. Then, as shown in FIG. 8C, the entire flange 22c is moved into the large diameter hole 52f. Then, the bolt member 52 is tightened, and the flange 22c is pressed down by one end surface 52h of the plurality of projecting portions 52k of the bolt member 52 (the surface on the back side in the paper front and back direction of the projecting portion 52k).
As described above, by providing the bolt member 52 with the plurality of notches 52d, the area of the plurality of protrusions 52k formed between the adjacent notches 52d and 52d can be increased, and the flange 22c is tightened by the protrusions 52k. The area can be increased. Therefore, the flange 22c can be pressed more uniformly, and the sealing performance can be further enhanced.

  As shown in FIGS. 8A to 8C, the notch 52d that allows the flange 22c to be inserted is formed in the joint insertion hole 52c of the bolt member 52, and the notch 52d of the joint insertion hole 52c is formed. Since the flange 22c is tightened at the peripheral end surface 52h, the flange 22c is inserted into the joint insertion hole 52c through the notch 52d. Therefore, there is no need to previously attach the bolt member 52 to the pipe 10, The degree of freedom of piping work can be increased. In addition, since the bolt member 52 is separate from the pipe 10, the number of replacement parts can be reduced when the bolt member 52 or the pipe 10 is replaced.

<Fifth Embodiment>
FIG. 9 is an explanatory diagram showing a pipe connection structure according to the fifth embodiment. 9A is a cross-sectional view of the pipe joint 62 showing the pipe portion 22b and the flange 62c of the pipe 60, FIG. 9B is a plan view showing the bolt member 12, and FIG. It is a top view which shows the state which clamped 62c. In addition, the same code | symbol is attached | subjected about the same structure as 1st Embodiment shown in FIG. 4, and detailed description is abbreviate | omitted.
As shown in FIGS. 9 (A) and 9 (B), a pipe joint 62 is integrally formed from a caulking portion 22a (see FIG. 3), a pipe portion 22b, and a flange 62c provided at the tip of the pipe portion 22b. It is formed.
The flange 62c has a plurality of notches 62d recessed radially inward at the outer peripheral edge thereof and formed at equal intervals in the circumferential direction.

The plurality of notches 62d are formed at positions corresponding to the plurality of protrusions 12e of the bolt member 12, respectively.
The outer diameter of the flange 62c is slightly smaller than the inner diameter of the joint insertion hole 12c of the bolt member 12, and the notches 62d of the flange 62c are respectively aligned with the protrusions 12e of the bolt member 12, whereby the flange 62c is bolted. The member 12 can be inserted into the end insertion hole 12k.
Between the adjacent notches 62d and 62d of the flange 62c, an outward projecting portion 62e that projects radially outward from the notch 62d is formed.

In FIG. 9C, in order to connect the pipe joint 62 of the pipe to the mating member 11 (see FIG. 3) with the bolt member 12, each notch 62d of the flange 62c is connected to each protrusion of the bolt member 12, as described above. The flange 62c is inserted to the end insertion hole 12k on the back side from the projecting portion 12e of the bolt member 12 in accordance with each of the portions 12e.
Then, the bolt member 12 is screwed into the mating member 11 so that the bolt member 12 is rotated relative to the flange 62c by an angle α (for example, α = θ / 2). As a result, as shown in FIG. 9C, the projecting portion 12e of the bolt member 12 overlaps the portion of the flange 62c without the notch 62d, that is, the outward projecting portion 62e in the axial direction.

By maintaining this state and further tightening the bolt member 12, the flange 62 c is pressed against the one end surface 12 h (see FIG. 3) of the protrusion 12 e of the bolt member 12, and the connection is completed.
Thus, by forming the notch 62d corresponding to each of the protrusions 12e of the bolt member 12 in the flange 62c, the flange 62c can be easily formed into the joint insertion hole 12c of the bolt member 12, more specifically, the end insertion hole 12k. It is possible to improve the workability at the time of pipe connection.

  As shown in FIGS. 9A to 9C, since the notch 62d corresponding to the protruding portion 12e is formed in the flange 62c, the notch of the flange 62c is formed in the protruding portion 12e of the joint insertion hole 12c. The flange 62c is inserted into the joint insertion hole 12c with the notches 62d aligned, and after the insertion, the circumferential position between the protruding portion 12e and the notch 62d is shifted to tighten the portion other than the notch 62d of the flange 62c with the protruding portion 12e. It is possible to connect the pipe 10 easily.

  As shown in FIGS. 1 to 4, by connecting the pipe 10 to the mating member 11 in a detachable manner, the fluid is connected to the pipe 10 and the brake fluid hole 11 e as a fluid passage formed in the mating member 11. In a pipe connection structure that circulates between the pipes, the pipe 10 is composed of a hose body 21 and a pipe joint 22 that is a pipe body having a flange 22c formed at the tip and attached to the end of the hose body 21. 22 is provided with a joint insertion hole 12c as an insertion hole through which the flange 22c of 22 is inserted, and at one end surface 12h as an opening edge of the joint insertion hole 12c of the bolt member 12 as a fastening member screwed to the mating member 11. By tightening 22c to the counterpart member 11 side, the brake fluid passage 22d as a fluid circulation hole formed in the flange 22c is made to be a brake fluid hole of the counterpart member 11. To connect with 1e.

  According to this configuration, there is no need for a pipe joint having a perforated bolt with a brake fluid passage formed therein or a spectacle body with an insertion hole through which the perforated bolt is passed, as in the prior art. The cost of the pipe 10 itself and the pipe connection structure can be reduced without loss.

  Further, as shown in FIGS. 3 and 4, the joint insertion hole 12c of the bolt member 12 is provided with a protruding portion 12e protruding inward in the radial direction, and the flange 22c is tightened by one end surface 12h of the protruding portion 12e. By inserting 22c from the joint insertion hole 12c of the bolt member 12 while avoiding the protruding portion 12e, it is not necessary to assemble the bolt member 12 to the pipe 10 in advance, and the degree of freedom of piping work can be increased. Moreover, since the bolt member 12 is a separate body from the pipe 10, the number of replacement parts can be reduced when the bolt member 12 or the pipe 10 is replaced.

1 and 3, the mating member 11 surrounds the bottom surface 11g as a pressing surface pressed by the flange 22c, the brake fluid hole 11e opened in the bottom surface 11g, and the bottom surface 11g. Since the bolt member 12 is screwed to the cylindrical portion 11b, the flange 22c can be easily positioned as a structure for inserting the flange 22c into the cylindrical portion 11b. Connection work of the pipe 10 can be performed.
Further, since the sealing washer 13 is provided between the flange 22c and the bottom surface 11g, it can be sealed with one sealing washer 13, and the number of washers 13 is smaller than that of the conventional pipe connection structure. This can reduce the cost.

The above-described embodiment is merely an aspect of the present invention, and can be arbitrarily modified and applied without departing from the gist of the present invention.
Corresponding to the plurality of notches 52d of the bolt member 52 shown in FIG. 8 (B), the flanges of the pipes are respectively provided with protrusions protruding outward in the radial direction that can be inserted through the plurality of notches 52d, After inserting the flanges into the large-diameter holes 52f with the protrusions aligned with the notches 52d, the relative positions in the circumferential direction of the notches 52d and the protrusions are shifted, and the bolt members 52 are screwed into the bolt members. The protruding portion of the flange may be tightened by the one end surface 52h of the protruding portion 52k of 52.

10, 60 Piping 11, 31, 41 Partner member 11b, 31b, 41b Tube portion 11e Brake fluid hole (fluid passage)
11g Bottom wall bottom (pressing surface)
12,52 Bolt member (fastening member)
12c, 45c, 52c Joint insertion hole (insertion hole)
12e, 45e, 52k Protruding part 12h, 45h, 52h One end face of the projecting part (opening edge)
13, 33 Washer 21 Hose body 22, 62 Fitting 22c, 62c Flange 22d Brake fluid passage (fluid flow hole) in the fitting
45 Nut member (fastening member)
52d, 62d Notch

Claims (5)

A fluid formed in the pipe (10, 60) and the mating member (11, 31, 41) by detachably connecting the pipe (10, 60) to the mating member (11, 31, 41). In the pipe connection structure that circulates between the passage (11e),
The pipes (10, 60) are a hose body (21) and a pipe body having a flange (22c, 62c) formed at the tip thereof, and a pipe joint (22) attached to the end of the hose body (21). 62)
The pipe (10, 60) is connected to the mating member (11, 31, 41) by a fastening member (12, 45, 52),
The fastening member (12, 45, 52) includes an insertion hole (12c, 45c, 52c) through which the flange (22c, 62c) is passed, and a threaded portion (thread, which is screwed to the mating member (11, 31, 41)). 12g, 45d)
A plurality of projecting portions (12e, 45e, 52k) which are arranged on the inner peripheral surface of the insertion holes (12c, 45c, 52c) at intervals in the circumferential direction and project radially inward, and in the circumferential direction A notch (12m, 52d) located between the adjacent protrusions (12e, 45e, 52k) is formed;
Before Symbol flange (22c, 62c) and, along the axial direction of the notch facing (12m, 52 d) in the oblique or the fastening member from between (12,45,52), said fastening member (12,45 , 52),
The flanges (22c, 62c) are formed by tightening the projecting portions (12e, 45e, 52k) to the mating member (11, 31, 41) side by the end surface on the mating member (11, 31, 41) side. A pipe connection structure characterized in that the fluid flow hole (22d) is connected to the fluid passage (11e) of the mating member (11, 31, 41). The flange (62c) is formed with a plurality of notches (62d) recessed radially inward at an outer peripheral edge thereof, spaced apart in the circumferential direction,
The plurality of notches (62d) are formed at positions corresponding to the plurality of protrusions (12e) of the fastening member (12),
The notches (62d) of the flange (62c) are respectively aligned with the protrusions (12e) of the fastening member (12), and the flange (62c) is fitted to the fastening member (12). pipe connection structure according to claim 1, characterized that you inserted along the axial direction. The protrusion (12e) of the fastening member (12) extends in the axial direction of the fastening member (12), and the one end surface (12h) of the protrusion (12e) on the counterpart member (11) side is pipe connection structure according to claim 1 or claim 2 to a position in the middle of the entire length of the fastening member (12), characterized in Rukoto. The counterpart member (11, 31, 41) includes a pressing surface (11g) pressed by the flange (22c, 62c), the fluid passage (11e) opened in the pressing surface (11g), and the pressing A cylindrical portion (11b, 31b, 41b) formed so as to surround the surface (11g), and the fastening member (12, 45, 52) is screwed to the cylindrical portion (11b, 31b, 41b). The pipe connection structure according to any one of claims 1 to 3 , wherein The pipe connection structure according to claim 4 , wherein a washer (13, 33) for sealing is provided between the flange (22c, 62c) and the pressing surface (11g).

Images