JPH0342999B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a hose cap. The present invention can be used, for example, as a hose cap for connecting an industrial high-pressure hose, a hose cap for connecting an automobile power steering hose, and a hose cap for connecting a full-on hose.

[Prior Art] Conventionally, a hose cap has been constructed by assembling a separate hose cap body 1000 and a sleeve 2000, as shown in FIGS. 19 to 21. Here, the hose cap body 1000 includes a joint part 1010 connected to a mating member, a flange part 1020 continuing from the joint part 1010, and a flange part 1020.
Subsequently, the nipple part 1030 has an outer diameter smaller than that of the flange part 1020. And the joint part 101
0, flange part 1020 and nipple part 103
A fluid passageway 1040 is formed through 0. A ring-shaped lock groove 1050 is formed continuously in the circumferential direction on the outer periphery of the nipple part 1030, and a seal groove 1070 that extends in a ring shape is formed.
are formed in series.

On the other hand, at one end of the sleeve 2000 in the core direction, a ring-shaped lock portion 201 protrudes radially inward.
0 are formed continuously in the circumferential direction. A sleeve 2000 having a lock portion 2010 is formed separately from the base body 1000 by forging, pressing, cutting, or the like.

When assembling the hose cap, as shown in FIG.
030 is coaxially covered with a sleeve 2000 from the outside. Next, as shown in FIG.
50 to engage the lock groove 1050 and the lock portion 2010 to form an integral structure. When crimped in this manner, a hose insertion space 2020 is formed between the sleeve 2000 and the nipple portion 1030. Next, as shown in FIG. 21, the end of the hose 3000 is inserted into the hose insertion space 2020, and in this state, the sleeve 2000 is crimped with hydraulic pressure. When crimped like this, the hose 3000
The inner periphery of the nipple part 1030 is pushed into the seal groove 1070 on the outer periphery of the nipple part 1030, thereby sealing the cap body 1000.
The sealing performance between the hose 3000 and the hose 3000 and the hose pull-out resistance are ensured.

However, in the above-described hose cap, the flange-shaped lock portion 2010 extends inwardly at the axial end.
A sleeve 2000 with
It is disadvantageous in terms of simplification of the manufacturing process and price.

Furthermore, in Japanese Patent Application Laid-Open No. 58-70789, a shaft-shaped or cylindrical first member and a second member are used, and the axial end face of the first member and the axial end face of the second member are abutted, and A joining means is disclosed in which end surfaces are friction welded together and welding burrs generated by the friction welding are stored in relief grooves. However, JP-A-58-
In the means disclosed in Japanese Patent No. 70789, the escape groove for storing the welding burr faces the outer circumferential surface and the inner circumferential surface of the first member and the second member. Therefore, a third member having an escape groove is provided separately from the first member and the second member, and the third member having an escape groove is arranged on the outer peripheral surface of the first member and the second member, or It must be placed on the inner peripheral surface of the second member. Therefore,
In addition to the first and second members whose axial end faces abut each other and are friction welded, a third member is required.

[Problems to be Solved by the Invention] Unlike the means disclosed in Japanese Patent Application Laid-open No. 58-70789, the present invention does not require a third member and is capable of storing welding burrs generated during friction welding. The purpose is to provide a hose cap that can be stored in a space.

[Means for Solving the Problems] A hose fitting according to a first aspect of the invention includes a cylindrical metal first pipe having a first fluid passage penetrating in the axial direction and having a joint portion connected to a mating member. a second fluid passage passing through the mouthpiece body in the axial direction and communicating with the first fluid passage;
and a cylindrical metal second cap body having a nipple portion with a fluid passage, the first cap body and the second cap body having opposing axial end surfaces friction welded to each other so as to form a first fluid passage. and a friction welded portion substantially coaxial with the axial end face of at least one of the first and second mouthpiece bodies, and the axial end face portion of at least one of the first mouthpiece body and the second mouthpiece body has a first fluid passage and a friction welded portion on the axial center side of the friction welded portion in the radial direction. Second
It is characterized by having a burr storage space that is located on the centrifugal direction side from the inner periphery of the fluid passage and is formed facing the other axial end face to store welding burrs generated by friction welding.

The hose fitting according to the second invention includes a joint part connected to a mating member, a flange part integrally disposed on one end side of the joint part and extending radially outward and having a larger diameter than the joint part; a nipple part integrally protruding from the center of the part and having a smaller diameter than the flange part;
A hose insertion space is formed by a metal cap body having a fluid passage that axially passes through a joint, a flange, and a nipple, and a nipple portion that coaxially covers the nipple of the cap body from the outside. The flange portion of the mouthpiece body has an inner diameter smaller than the inner diameter of the sleeve and an outer diameter larger than the outer diameter of the sleeve, which is approximately coaxial with the fluid passage on its axial end surface. It has a ring-shaped groove, and the axial end surface of the sleeve is fitted into the groove and friction welded to the bottom of the groove to form a friction weld. The outer burr is housed in the outer periphery of the axial end surface of the sleeve in the groove, and the inner welding burr of the friction welding part is housed in the inner periphery of the axial end surface of the sleeve in the groove. It is.

Friction welding is a method of heating the joint surfaces with frictional heat and applying pressure in the heated state. By employing friction welding, even if the materials are different metals, they can be easily joined without or almost without the use of flux, and the strength of the joint can be ensured. The conditions for friction welding are, for example, a rotation speed of 1500
~3000rpm, pressure is 2~10 when rotating with heat generation
It can be about Kg/mm ² or about 3 to 20 Kg/mm ² during pressure welding. Types of friction welding include those in which one part is fixed while the other is rotated, one in which one and the other are rotated in opposite directions, one in which at least one part is rotated while applying vibration, or any other type. good.

The materials for forming the cap body and sleeve are as follows:
Carbon steel such as mild steel and hard steel, alloy steel, stainless steel, aluminum alloy, etc. can be used. The base body can usually be formed by forging, pressing, cutting, etc. The sleeve can be formed by cutting a generally commercially available round pipe into a predetermined length.

By the way, in the first invention, the axial end surface portion of at least one of the first cap body and the second cap body is
A ring-shaped burr storage space is formed facing the other axial end face and stores welding burrs generated by friction welding. The burr storage space is located on the axial center side of the friction welding part, that is, on the inner circumference side of the friction welding part, and on the centrifugal side of the inner circumferences of the first fluid passage and the second fluid passage, in the radial direction of the mouthpiece body. do.

Further, in the second invention, the flange portion of the base body is
The axial end surface thereof has a ring-shaped groove that is substantially coaxial with the fluid passage and has an inner diameter smaller than the inner diameter of the sleeve and an outer diameter larger than the outer diameter of the sleeve.
The axial end surface of the sleeve is fitted into the groove and friction welded to the bottom surface of the groove, thereby forming a friction welded portion with the bottom surface of the groove. The outer weld burr of the friction weld is stored in the groove on the outer circumference of the axial end surface of the sleeve, and the inner weld burr of the friction weld is housed in the inner circumference of the axial end surface of the sleeve in the groove. has been done.

[Example] An example of the hose cap according to the first invention will be described with reference to Figs. 1 to 6 and Figs. 7 to 18.

(Structure) The base body 1 used in this example is made of mild steel, and includes a joint part 10 and a joint part 1 that are connected to a mating member.
The first cap body 1A is made up of a flange portion 11 that continues to the flange portion 11, and the second cap body 1B has a nipple portion 12 having a long cylindrical shape. A threaded portion 100 is formed on the outer periphery of the joint portion 10 to be screwed into a screw hole of a mating member for connection to the mating member. A plurality of ring-shaped seal grooves 120 are formed in series on the outer periphery of the nipple portion 12. The bottom wall 120a of the seal groove 120 has the same diameter in the axial direction. In the first cap body 1A of the cap body 1, a first cap penetrating through the joint portion 10 and the flange portion 11
A fluid passage 13a is formed. In the second cap body 1B of the cap body 1, a second fluid passage 13b passing through the nipple portion 12 is formed. The fluid passages 13a and 13b serve as fluid passage holes through which fluid flows within the hose.

By the way, as shown in FIG. 1, an outer burr storage space 1E and an inner burr storage space 1F, which serve as burr storage spaces, extend continuously in the circumferential direction at the axial end face of the first mouthpiece body 1A, forming a ring shape. is formed.
The inner burr storage space 1F is located on the axial center direction side (that is, on the inner periphery side) of the protrusions 1R and 1T as friction welding parts, and on the centrifugal direction side (that is, on the outer periphery side) than the inner periphery 13e of the first fluid passage 13a. positioned. Further, an inner burr storage space 1P serving as a burr storage space is formed in a ring shape continuously extending in the circumferential direction on the axial end surface portion of the second cap body 1B. Similarly, the inner burr storage space 1P is located on the axial center direction side (that is, the inner circumference side) of the protrusions 1R and 1T as friction welding parts, and on the centrifugal direction side (that is, the outer circumference side) than the inner circumference 13f of the second fluid passage 13b. side). The axial end surface of the first cap body 1A includes a ring-shaped inward protrusion 1Q that is located on the flange part 11 and protrudes inward, a ring-shaped protrusion 1R that protrudes in the axial direction, and a shaft. Ring-shaped protrusion 1S protruding in the direction
is formed. Further, a ring-shaped protrusion 1T that projects in the axial direction and a ring-shaped protrusion 1U that projects in the axial direction are formed on the axial end surface of the second cap body 1B, and furthermore, the outer periphery of the second cap body 1B The department has
A ring-shaped outward protrusion 1W is formed that protrudes outward in the radial direction. Note that, as shown in FIG. 1, the inner diameter of the inward protrusion 1Q and the outer diameter of the protrusion 1T are approximately equal.

In this embodiment, the first cap body 1A of the cap body 1 is
As shown in FIGS. 7 and 8, it is formed by cutting and boring a round bar 14 or square bar 15 made of stainless steel with excellent corrosion resistance. The second cap body 1B of the cap body 1 is shown in FIG.
As shown in FIG. 9, it is formed by cutting and boring a round bar 14 or square bar 15 made of steel. As shown in FIG. 10, a seal groove 1 is provided in the nipple portion 12 of the second cap body 1B.
A plurality of 20 are formed in series.

In assembling the hose cap according to this embodiment, first, as shown in FIG. 11, the second cap body 1B is clamped and fixed to the fixing chuck 41 of a friction welding machine. On the other hand, the first cap body 1A of the cap body 1 is held between the rotary chuck 42 of the friction welding machine. A drive motor is connected to the rotary chuck 42. In this case, the first cap body 1A and the second cap body 1B are coaxial.

Then, as shown in FIG. 12, force is applied to the rotary chuck 42 in the direction of arrow X, and the first
While pressing the cap body 1A and the second cap body 1B, the drive motor is driven to rotate the rotary chuck 42.
Rotate. Then, as is clear from FIG. 1, the opposing protrusion 1R of the first cap body 1A and the protrusion 1T of the second cap body 1B come into sliding contact. Therefore, frictional heat is generated at the joint between the protrusion 1R of the first cap body 1A and the protrusion 1T of the second cap body 1B, and the friction heat generates heat at the joint, resulting in a high temperature. When the joint reaches a suitable temperature, a further force is applied to the rotary chuck 42 in the direction of arrow X, and the rotation of the rotary chuck 42 is stopped. As a result, as shown in FIG. 3, the protrusion 1R of the first cap body 1A and the protrusion 1T of the second cap body 1B are friction welded, and the first cap body 1A and the second cap body 1B are welded together. be integrated. As a result of friction welding the first cap body 1A and the second cap body 1B in this way, as shown in FIG. An external welding burr 31 and an internal welding burr 32 occur over almost the entire circumference. In this regard, in this embodiment, the outer beam 31 is stored in the outer beam storage space 1E, and the inner beam 32 is stored in the inner beam storage spaces 1F and 1P.

If the first cap body 1A and the second cap body 1B are integrated by friction welding to form the cap body 1 as described above, as shown in FIGS. 13 and 14, the sleeve 2 is made of mild steel. A long round pipe 3 is clamped and fixed to a fixing chuck 41 of a friction welding machine. On the other hand, the first cap body 1A and the second cap body 1B
The base body 1, which is integrally welded with the base body 1, is clamped and held by a rotary chuck 42 of a friction welding machine. in this case,
The round pipe 3 coaxially covers the nipple part 12 of the mouthpiece body 1 from the outside, and makes the flange part 11 and the round pipe 3 face each other.

Then, as shown in FIG. 15, a force is applied to the rotary chuck 42 in the direction of the arrow X, and while the round pipe 3 is pressed against the flange portion 11 of the base body 1, the drive motor is driven to rotate the rotary chuck 42. By doing so, the base body 1 is rotated around the axis of the base body 1. Then, as shown in FIG. 4, the inward protrusion 1Q of the opposing flange portion 11
and one end surface of the round pipe 3 come into sliding contact. Therefore,
Frictional heat is generated at the joint between the inward protrusion 1Q of the flange 11 and one end surface of the round pipe 3, and the frictional heat generates heat at the joint, resulting in a high temperature. When the joint reaches a suitable temperature, a further force is applied to the rotary chuck 42 in the direction of arrow X, and the rotation of the rotary chuck 42 is stopped. As a result, as shown in Figure 4,
The inward protrusion 1Q of the flange portion 11 and one end surface of the round pipe 3 are friction welded, and the base body 1 and the round pipe 3 are welded together.

In this example, the conditions for friction welding are that the rotation speed is
Approximately 1,500 to 3,000 rpm, pressure during heat-generating rotation, that is, frictional heat-generating pressure of approximately 3 to 10 Kg/ ^mm2 , pressure during final pressure welding when the joint reaches an appropriate temperature,
That is, the upset pressure was about 8 to 20 kg/mm ² and the upset amount was about 5 to 10 mm.

As a result of friction welding the base body 1 and the round pipe 3 as described above, as shown in FIG. A burr 34 is formed.

Next, as shown in FIG.
, and while rotating the rotary chuck 42, apply the cutter blade 43 to the outer burr 33.
At step 3, the outer burr 33 is removed, and the long cylindrical round pipe 3 is cut to a predetermined length to form the sleeve 2, thereby completing the manufacture of the hose cap according to this embodiment.

In the hose cap manufactured as described above, a hose insertion space 20 is formed between the nipple portion 12 and the sleeve 2, as shown in FIG.
Therefore, the end portion 50 of the hose 5 is inserted into the hose insertion space 20 as in the conventional case, and the sleeve 2 is caulked using hydraulic pressure, for example, like a bale tightening. Then, as shown in FIG. 6, the end 50 of the hose 5 is held between the nipple part 12 and the sleeve 2, so the inner circumference of the end 50 of the hose 5 is pushed into the seal groove 120 of the nipple part 12. , whereby the base body 1 and the hose 5 are connected.

(Effect) As described above, in this embodiment, the first cap body 1A
An outer burr storage space 1E and an inner burr storage space 1F are formed in a ring shape and extend continuously in the circumferential direction at the axial end face portion of the holder. Further, an inner burr storage space 1P is formed in a ring shape and extends continuously in the circumferential direction at the axial end face portion of the second cap body 1B. Therefore, the welding outer burr 31 is stored in the outer burr storage space 1E,
Since the inner welding burr 32 is stored in the inner burr storage space 1F and the inner burr storage space 1P, the outer welding burr 31,
Post-processing for removing internal welding burrs 32 can be made unnecessary or simplified.

Moreover, outer burr storage space 1E, inner burr storage space 1
F is formed in the axial end face of the first cap body 1A, and the inner burr storage space 1P is formed in the second cap body 1B.
It is formed on the axial end face portion of. Therefore, the welding burr is housed only in the axial end surface of the first cap body 1A and the axial end surface of the second cap body 1B, which abut each other.
Unlike the means disclosed in Japanese Patent No. 58-70789, there is no need to provide a third member having an escape groove separately from the first cap body 1A and the second cap body 1B.

In particular, in this example, the outer burr storage space 1E, the inner burr storage space 1F, and the inner burr storage space 1P are located in the first fluid passage on the axial center direction side (that is, on the inner peripheral side) of the protrusions 1R and 1T as friction welding parts. Inner circumference 1 of 13a
3e, since it is located on the centrifugal direction side (that is, on the outer circumferential side) than the inner circumference 13f of the second fluid passage 13b, the internal welding burr 32 is located in the fluid passages 13a, 13b.
You can prevent it from jumping out inside. Therefore, it is possible to suppress as much as possible the internal welding burr 32 from disturbing the flow of the fluid flowing in the fluid passages 13a, 13b and from increasing the resistance to passage of the fluid.

By the way, in the conventional case shown in FIGS. 19 to 21, the base body 1000 is a one-piece body, and is therefore formed by drilling or the like from a single round bar or square bar. It is not easy to form the cap body 1000 with a complicated shape by drilling, which increases the cost. In addition, although the cap body 1000 is subjected to surface treatment such as plating to improve its appearance, the nipple portion 10 does not require any particular surface treatment because the cap body 1000 is a single piece.
No. 30 was also subjected to surface treatment, which was uneconomical. In this regard, in this embodiment, the first cap body 1A and the second cap body 1B are integrally formed by friction welding, so unlike the conventional case, it is necessary to form them from one round bar or square bar. There is no problem, and the first cap body 1A and the second cap body 1B can be manufactured separately. Therefore, even if the seal groove 120 has a complicated shape, it is advantageous in terms of manufacturing. It can also contribute to cost reduction. Furthermore, if the first cap body 1A of the cap body 1 according to this embodiment is made of stainless steel with good corrosion resistance, the second cap body 1B, whose appearance is invisible to the human eye, does not need to be subjected to surface treatment. It is advantageous for cost reduction.

Furthermore, in the conventional method shown in FIGS. 19 to 21, the lock portion 2 of the base body 1000 of the sleeve 2000 is
010 is locked into the locking groove 1050, and due to the lock crimping structure, even after locking, a small gap tends to be left between the locking part 2010, that is, the sleeve 2000, and the locking groove 1050, that is, the base body 1000. Therefore, in order to prevent liquid from entering the minute gap between the locking part 2010 and the locking groove 1050 and causing corrosion deterioration, the sealing groove 10 of the nipple part 1030 is
The shape and structure of 70 must be made considerably complicated, and the number of seal grooves 1070 must also be increased.

In this regard, in this embodiment, the cap body 1 and the sleeve 2 are
Since they are integrally welded together by friction welding, no gap is created between the cap body 1 and the sleeve 2 due to caulking. Therefore, the seal groove 12 of the nipple part 12
The shape and structure of 0 may be simplified or, of course, may be complicated. Therefore, compared to the conventional method shown in FIGS. 19 to 21, in which the cap body 1000 and the sleeve 2000 are locked together, the seal groove 12 is
The degree of freedom in selecting 0 can be improved. Therefore, it is advantageous in terms of manufacturing work and economy of the seal groove 120.

In addition, in this embodiment, the sleeve 2 and the cap body 1
Since it is integrated with the body by friction welding, the base body 1
Even when an external force in the circumferential direction is applied to the sleeve 2, the sleeve 2 does not rotate in the circumferential direction relative to the base body 1. In this sense as well, it is possible to maintain good adhesion between the seal groove 120 and the inner peripheral portion of the hose 5, which is advantageous in maintaining the sealing performance between the seal groove 120 and the hose 5.

Moreover, the sleeve 200 shown in FIGS. 19 to 21
In the conventional hose cap in which the sleeve 2000 is locked into the cap body 1000, when the hose 3000 is pulled in the axial direction, the sleeve 2000, that is, the locking portion 2010 of the sleeve 2000 locks into the locking groove 105.
0, that is, it is displaced by a minute amount in parallel to the axial direction with respect to the base body 1000. Sleeve 20 as above
If 00 is displaced by a minute amount, the degree of adhesion between the seal groove 1070 and the inner peripheral portion of the hose 3000 will change, causing a problem that the sealing performance between the two will deteriorate. In this regard, in this embodiment, since the sleeve 2 and the base body 1 are integrated by friction welding, there is no problem as in the conventional case.

Furthermore, in this embodiment, unlike the conventional method, the sleeve 2 is formed by cutting the round pipe 3 after friction welding the normally used round pipe 3 to the base body 1, so that the sleeve 2 cannot be manufactured one by one. It's fine. Therefore, the sleeve 2 can be formed by cutting a commercially available round pipe 3. In this regard, Figures 19 to 2
A sleeve 200 having a flange-shaped lock portion 2010 projecting radially inward as shown in FIG.
Unlike the conventional method of manufacturing 0 by forging, cutting, etc., it is more economical.

[Other Examples] The embodiment of the hose cap according to the second invention is described as a 22nd embodiment of the hose cap according to the second invention.
As shown in the figure. The example shown in FIG. 22 has basically the same configuration as the embodiment described above, and is given the same reference numeral. Therefore, the following description will focus on the points that are different from the above-described embodiments. The flange portion 11 of the mouthpiece body 1 has a ring-shaped groove 51 on its axial end surface. The groove 51 is substantially coaxial with the fluid passages 13a and 13b, and has an inner diameter smaller than the inner diameter of the sleeve 2 and an outer diameter larger than the outer diameter of the sleeve 2.

The axial end surface of the sleeve 2 is fitted into the groove 51 and friction welded to the bottom surface 51d of the groove 51 to form the groove 5.
A friction welded portion is formed with the bottom surface 51d of 1.

The outer welding burr of the friction welding part is housed in the outer circumference side part 51a of the axial end surface of the sleeve 2 in the space of the groove 51, and the inner welding burr of the friction welding part is housed in the outer peripheral part 51a of the axial end surface of the sleeve 2 in the space of the groove 51. It is housed in a portion 51b on the inner peripheral side of the axial end surface of No.2.

In this embodiment shown in FIG. 22, the same effects as in the above embodiment can be obtained, and
1, the welding burr 50 can be housed in the welding burr 1, and therefore post-processing for removing the welding burr 50 can be eliminated or greatly simplified. Furthermore, in this embodiment, as in the previous embodiment, the sleeve 2 can be manufactured using the round pipe 3 that is commonly used.
Unlike the conventional hose cap shown in the figure, there is no need to use a sleeve 2000 having an inner flange-like locking portion 2010, which is advantageous in terms of cost.

In the embodiment shown in FIG. 22, the base body 1 is formed by welding the first base body 1A and the second base body 1B into one body by friction welding, but the present invention is not limited to this. The base body may also be used.

Another embodiment of the hose cap according to the present invention is shown in FIG. 23. In the example shown in FIG. 23, a plurality of locking protrusions 1Y are formed on the second cap body 1B of the cap body 1 at predetermined intervals in the circumferential direction, and a flange portion of the first cap body 1A is formed. 11 has a plurality of inward protrusions 1Q formed at predetermined intervals in the circumferential direction, and the locking protrusions 1Y and the inward protrusions 1Q face each other. This embodiment also provides substantially the same effects as the embodiments shown in FIGS. 1 to 18 described above. Furthermore, in this embodiment, even when an extremely large force is applied and the welded portion between the first cap body 1A and the second cap body 1B is damaged, the locking protrusion 1Y and the protrusion 1Q are not locked. Therefore, the first cap body 1A and the second cap body 1B cannot be separated, which prevents scattering and is advantageous for ensuring safety.

Further, in the embodiments shown in FIGS. 1 to 6, the cap body 1 is divided into two parts, that is, the first cap body 1A and the second cap body 1B are frictionally integrated. However, the present invention is not limited to this. The base body may be divided into three or more parts, and these parts may be welded together by friction welding.

[Effects of the Invention] According to the hose cap according to the first invention, burrs generated during welding are stored in the burr storage space.
Is it possible to eliminate the need for post-processing for deburring?
It can be greatly simplified. Moreover, the burr storage space is the best
It is formed on the axial end surface of at least one of the base body and the second base body. Therefore, the welding burr is housed only in the axial end surface of the first cap body and the second cap main body, which are butted against each other. Unlike the means, the third part has a relief groove.
There is no need to provide the member separately from the first cap body and the second cap body.

According to the hose cap according to the first invention, in particular, the burr storage space is located on the axial center direction side (that is, on the inner periphery side) of the friction welding part and in the centrifugal direction than the inner periphery of the first fluid passage and the second fluid passage. Since it is located on the side (that is, on the outer circumferential side), it is possible to suppress the welding burr from jumping out into the fluid passage. Therefore, it is possible to suppress as much as possible the disturbance of the flow of the fluid flowing in the fluid passage and the increase in the passage resistance of the fluid.

Further, in the hose cap according to the first invention, when the second cap body and the first cap body are formed of different materials, the first cap body on the side that is easily touched by the human eye is made of a metal with good corrosion resistance. The remaining second cap body, which is not visible or hardly touched by the human eye, can also be formed of ordinary metal, and therefore surface treatment such as plating on the cap body can be eliminated.

Furthermore, in the hose cap according to the second invention, the sleeve can be manufactured from a normal round pipe, and unlike the conventional hose cap shown in FIG. , which is advantageous in terms of price.

[Brief explanation of drawings]

1 to 18 show an embodiment of the present invention,
Figure 1 is a sectional view of the base body before the first base body and second base body are friction welded, and Figure 2 is a state where the first base body and second base body of the base body are friction welded. Figure 3 is a cross-sectional view of the base body covered with a sleeve, Figure 4 is a cross-sectional view of the hose base and sleeve friction welded, and Figure 5 is a hose base and sleeve friction welded. , sectional view with the outer burr removed, FIG. 6 is a sectional view of the hose cap with a hose attached, FIG. 7 is a schematic perspective view of the material forming the cap body, and FIG. 8 is a schematic of the first cap body. 9 is a schematic perspective view of the second cap body, FIG. 10 is a schematic perspective view of the second cap body after forming a seal groove, and FIG. 11 is a schematic perspective view of the second cap body held by a fixed chuck. , a schematic side view of the first cap body held in the rotary chuck, and FIG.
A schematic side view of the mouthpiece body and the second mouthpiece body being friction welded, FIG. 13 is a perspective view of the round pipe forming the sleeve, and FIG. 14 is a fixed chuck holding the sleeve and a rotating chuck holding the sleeve body. Fig. 15 is a schematic side view of the cap body and sleeve being friction welded, Fig. 16 is a schematic side view of the case with the outer burr removed, Fig. 17 18 is a schematic side view of the state before the hose is attached to the base body, and FIG. 18 is a schematic side view of the state after the hose is attached to the base body. 19th
21 shows the conventional technique, and FIG. 19 is a cross-sectional view of the state before the sleeve is crimped onto the base body.
FIG. 20 is a cross-sectional view of the state after the sleeve is caulked to the base body, and FIG. 21 is a cross-sectional view of the state where the base body and the hose are connected. Fig. 22 shows another embodiment according to the present invention, and is a sectional view of the state after friction welding the cap body and the round pipe, and Fig. 23 shows another embodiment according to the present invention, in which the cap body and the round pipe are friction welded. It is a sectional view of the state after friction welding with a round pipe. In the figure, 1 is the base body, 10 is the joint part, 11 is the flange part, 12 is the nipple part, 2 is the sleeve, 3
1 indicates a round pipe, 5 indicates a hose, 1E indicates an outer burr storage space, 1F indicates an inner burr storage space, and 1P indicates an inner burr storage space.

Claims (1)

[Scope of Claims] 1. A cylindrical metal first base body having a first fluid passageway penetrating in the axial direction and having a joint part connected to a mating member, and a first fluid passageway penetrating in the axial direction. and a cylindrical metal second cap body having a nipple portion with a second fluid passage communicating with the first cap body, and the first cap body and the second cap body have opposing axial end surfaces facing each other. The first one is friction welded
has a fluid passageway and a substantially friction welded portion, and the axial end face portion of at least one of the first mouthpiece body and the second mouthpiece body is configured to have a fluid passageway and a substantially friction welded portion, and the axial end face portion of at least one of the first mouthpiece body and the second mouthpiece body is arranged to have a fluid passageway and a substantially friction welded portion; It is characterized by having a burr storage space located on the centrifugal side from the inner periphery of the passage and the second fluid passage and facing the other axial end face, and accommodating welding burrs generated by friction welding. Hose cap. 2 A joint part that is connected to a mating member, a flange part that is integrally arranged on one end side of the joint part and extends radially outward and has a larger diameter than the joint part, and a flange part that is integrally arranged from the center part of the flange part. a metal cap body having a nipple portion that protrudes from the flange portion and has a smaller diameter than the flange portion; and a fluid passage passing through the joint portion, the flange portion, and the nipple portion in the axial direction; It is composed of a cylindrical metal sleeve that covers coaxially from the outside and forms a hose insertion space with the nipple part, and the flange part of the mouthpiece body has a flange part that is substantially coaxial with the fluid passage and has a flange part on its axial end surface. It has a ring-shaped groove having an inner diameter smaller than the inner diameter of the sleeve and an outer diameter larger than the outer diameter of the sleeve, and the axial end surface of the sleeve is fitted into the groove and friction-welded to the bottom surface of the groove. and the bottom surface of the groove to form a friction weld, and the outer weld burr of the friction weld is housed in the outer peripheral side of the axial end surface of the sleeve of the groove and the inner weld of the friction weld. A hose cap characterized in that a burr is housed on the inner peripheral side of the axial end surface of the sleeve of the concave groove.