JP2000274576A - Hose connecting structure and hose - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify constitution of a seal as well as to reduce the number of parts by a hose connecting structural body in constitution to connect a first hose to a connector. SOLUTION: A hose connecting structural body is furnished with a connector side engagement part formed on a connector 20, a hose side crest part 13 projected from an outer peripheral surface of one end part of a first hose 10 and to be engaged with the connector side engagement part and an O-ring to seal between the first hose 10 and the connector 20 in a state where the connector side engagement part and the hose side crest part 13 are engaged with each other, and the hose side crest part 13 is formed of a first inclined surface 13a inclined to the opposite side against the insertion side of the connector 20 from the outer peripheral surface of the first hose 10 and a second inclined surface 13b an angle made with the outer peripheral surface of the first hose 10 and a top part of the first inclined surface 13a of which becomes an acute angle.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hose connection structure and a hose which can connect a hose and a connector with one touch.

[0002]

2. Description of the Related Art Heretofore, as this kind of hose connection structure, there has been known a structure using a so-called quick connector for connecting a hose and a connector with one touch. FIG. 9 is a sectional view showing a state in which the first hose 210 and the second hose 220 are connected by the connector 230. In FIG. 9, the connector 230 includes a male connection part 240 connected to the first hose 210 and a female connection part 250 connected to the second hose 220.
Is inserted into the female connection section 250 so as to be connected. That is, the male-side connecting portion 240
Is a male body 24 for insertion into the female side connection 250.
1 and a connection end 242 for inserting the first hose 210 into an end of the male main body 241. On the other hand, the female side connection part 250 includes a large diameter part 251, a small diameter part 252, and a connection end 253.
And an insertion space 254 for inserting the male body 241 from the large diameter portion 251 to the small diameter portion 252.
Are formed. Further, between the outer periphery of the male-side connection portion 240 and the inner periphery of the female-side connection portion 250, an O-ring 261,
262 intervenes to seal therebetween. Further, an engagement protrusion 243 is formed at an end of the male side connection portion 240,
This engaging protrusion 243 is engaged with the engaging protrusion 2 of the female connection portion 250.
With the engagement of 55, the female connection portion 250 and the male connection portion 240 are prevented from being pulled out.

In order to connect the first hose 210 and the second hose 220 using such a connector 230, the first hose 210 is press-fitted into the connection end 242 of the male connection portion 240 and the female connection portion 250 is connected. The second hose 220 is pressed into the connection end 253. And the male side connection part 24
The male body 241 is press-fitted into the insertion space 254 of the female connection portion 250. Thereby, the O-rings 261, 261
The male side connection part 240 and the female side connection part 250
Is sealed, and the engagement protrusion 255 of the female connection portion 250 is engaged with the engagement protrusion 243 of the male connection portion 240, so that the female connection portion 250 and the male connection portion 240 are prevented from coming off. Is done.

[0004]

However, the conventional connector 230 has a male connector 240 and a female connector 250.
Thus, there are demands for further simplifying the configuration and reducing the number of components. In addition, the large number of parts increases the number of seal locations. That is, in the connector 230, three places that require sealing are the first hose 210 and the second hose 220 at both ends of the connector 230, and the sealing by the O-rings 261 and 262. By reducing such seal points,
It was also desired to simplify the configuration.

The present invention solves the above-mentioned problems of the prior art, and provides a hose connecting structure and a hose which can reduce the number of parts and simplify the structure of a seal with respect to a structure for connecting a hose to a connector. The purpose is to:

[0006]

Means for Solving the Problems and Action / Effect of the Invention According to a first aspect of the present invention, a hose is connected to a connector by press fitting a hose connection end formed at one end of the hose into the connector. A connector-side engaging portion formed on the connector; a hose-side crest protruding from the outer peripheral surface of the hose and engaging with the connector-side engaging portion; Sealing means for sealing between the hose and the connector in a state where the portion and the hose-side crest are engaged, the hose-side crest being opposite to the insertion side of the connector from the outer peripheral surface of the hose. It is characterized by being formed of a first inclined surface inclined to the side, and a second inclined surface in which the angle formed between the outer peripheral surface of the hose and the top of the first inclined surface is an acute angle.

In the hose connection structure according to the present invention, in order to connect the hose to the connector, the hose is pressed into the connector. At this time, the connector-side engaging portion hits the first slope of the hose-side mountain portion of the hose, and the hose-side mountain portion is lowered. Then, the connector-side engaging portion rides over the hose-side mountain portion and engages with the second inclined surface of the hose-side mountain portion, whereby the connector and the hose are engaged and stopped, and at the same time, the sealing means is closed. Seal between connector and hose.

[0008] In such a configuration, the hose-side peak portion that engages with the connector-side engaging portion is integrally formed on the outer peripheral surface of the hose, and is not formed on a separate connection member from the connector. That is, the connector can be constituted by one component, and the number of components can be reduced as compared with the conventional connector.

Further, unlike the case where the connector as described in the prior art is formed by a plurality of members, a plurality of sealing portions are not required, that is, one sealing portion by the sealing means is sufficient. The configuration can be simplified.

Further, since the angle formed between the outer peripheral surface of the hose and the top of the first inclined surface of the second inclined surface of the hose-side mountain portion is an acute angle, the hose-side mountain portion is formed at the time of connection work. When the connector side engaging portion is engaged with the second inclined surface, a large force is required for the hose-side mountain portion to fall to the opposite side without requiring a large force to fall down, and the connection is made securely. Can be.

According to a second aspect of the present invention, in a hose connected to the connector by engaging with a connector-side engaging portion formed on the connector, the hose protrudes from the outer peripheral surface of the hose and engages with the connector-side engaging portion. A first sloped surface inclined from the outer peripheral surface of the hose to the opposite side to the insertion side of the connector, a top surface of the outer peripheral surface of the hose and a top of the first inclined surface. And the second inclined surface having an acute angle.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to further clarify the configuration and operation of the present invention described above, a preferred embodiment of the present invention will be described below.

FIG. 1 is a sectional view showing a hose connecting structure according to an embodiment of the present invention, FIG. 2 is a sectional view showing a state before connecting the hose connecting structure, and FIG. 3 is a side view of FIG. It is. The hose connection structure includes a first hose 10, a second hose 18, and a connector 20 that connects the first hose 10 and the second hose 18. It is connected by press fitting into one hose 10. Hereinafter, the configuration of each unit will be described in detail.

As shown in FIG. 2, the first hose 10 has a hose body 12 having a passage 11. As the first hose 10, a hose made of rubber or resin as a main material, or a hose having a reinforcing layer formed of a reinforcing thread therein can be used. On the outer peripheral portion of the first hose 10, a hose-side mountain portion 13 for engaging with the connector 20 is formed over the entire circumference. That is, as shown in FIG. 4, the hose-side mountain portion 13 has a first inclined surface 13 having an angle θa inclined at 10 to 45 ° toward the side opposite to the insertion side of the connector 20.
a, and has an undercut second inclined surface 13b that rises from the outer peripheral surface of the first hose 10 at an acute angle of 20 to 90 °. Also, the thickness t1 of the hose-side peak 13 is the thickness t2 of the hose body 12.
It is formed thinner.

Returning to FIG. 2, the connector 20 for inserting and connecting the first hose 10 has a connector main body 21. The connector body 21 is, in order from the first hose 10 side,
It is a resin molded product that becomes thinner into the large diameter portion 22, the small diameter portion 23, and the hose connection portion 24. The inside of the large diameter part 22 and the small diameter part 23 is an insertion space 25 for inserting the end of the first hose 10. The insertion space 25 is connected to a passage 24b formed inside the hose connection portion 24, and is connected to the second hose 18 via the passage 24b. On the outer peripheral portion of the hose connection portion 24, annular projections 24a are formed at equal intervals in three rows.
The insertion force and the sealing force are increased when the is inserted.

At the end of the opening 21a of the large-diameter portion 22, connector-side engaging portions 26a, 26b, 26c are formed. As shown in FIG.
a, 26b, and 26c are formed at equal intervals in the circumferential direction (two in the figure), and the claw at the tip is formed so as to engage with the hose-side mountain portion 13 of the first hose 10. ing.

O-rings 41 and 42 are interposed between the inner peripheral surface of the large diameter portion 22 and the first hose 10. The O-rings 41 and 42 seal between the connector 20 and the first hose 10. O-ring 41 and O-ring 4
2 and on the side of the O-ring 41, a spacer 43,
The O-rings 41 and 42 are positioned.

Using the connector 20, the first hose 1
0 to the connector 20, first, the connector 20
O-ring 41 and spacers 43 and 4
4 is housed by inserting it through the opening 21a.
In this state, the hose connection portion 24 of the connector 20 is
The connector 20 and the second hose 18 are connected by press-fitting from the open end of the hose 18.

Next, the end of the first hose 10 is inserted into the insertion space 25 through the opening 21a of the connector 20. FIG. 5 and FIG. 6 are explanatory diagrams illustrating the operation of connecting the first hose 10 to the connector 230. As shown in FIG. 5, the connector-side engaging portion 26a of the connector 20 presses the first inclined surface 13a of the hose-side mountain portion 13 of the first hose 10, and as shown in FIG. Push down in the direction of the arrow against the elastic force. When the connector-side engaging portion 26a gets over the hose-side mountain portion 13, the hose-side mountain portion 13 returns to its original shape by a repulsive force. As a result, the connector-side engaging portion 26a becomes the second inclined surface 13b of the hose-side mountain portion 13.
, The connector 20 is connected to the first hose 10.
Will be stopped against.

In the above-described embodiment, the hose-side peak portion 13 which engages with the connector-side engaging portions 26a, 26b, 26c.
Are integrally formed on the outer peripheral portion of the first hose 10, and the male connector as described in the related art is not required. That is, the connector can be formed by one component, and the number of components can be reduced as compared with the conventional connector.

Further, since the male connector described in the related art is not required, a seal between the male connector and the hose is not required, and the first hose 10 and the connector 2 are not required.
Only one seal is required in the O-rings 41 and 42 between 0 and the configuration for sealing can be simplified.

Next, a method of manufacturing the first hose 10 having the hose-side peak 13 in the above embodiment will be described. The first hose 10 can be manufactured by a blow molding method, an extrusion molding method, or the like. FIG. 7 is an explanatory diagram for explaining the blow molding method among the methods for manufacturing the first hose 10.

Referring to FIG. 7, a molding die 50 includes an upper die 51.
And a lower mold 52, and a cavity 53 is formed by the upper mold 51 and the lower mold 52. This cavity 53
Are annular recesses 53 for forming the hose side peaks 13.
a. As shown in the drawing, the recess 53a has a shape that forms an undercut of the hose-side peak 13 at an angle θb. In order to form the first hose 10 using the forming die 50, a parison P for forming the first hose 10 is loaded into the cavity 53 with the upper die 51 and the lower die 52 opened. After the mold is clamped, gas is blown into the parison P so that the parison P is
Make it imitate the wall of 3. The first hose 10 is formed by cooling and solidifying the parison P and then releasing it.
At this time, an undercut due to the recess 53a is formed in the first hose 10, but since the first hose 10 is formed of flexible rubber or resin, it is elastically deformed and easily separated. Can type.

In the first hose 10, the recess 53a
When the parison P is extended along to form the hose-side crests 13, as shown in FIG. If the thickness of the hose-side mountain portion 13 is thin, elastic deformation becomes easy,
Can be easily inserted.

Also, the second inclined surface 13 of the hose-side mountain portion 13
The angle θb of b is determined in consideration of the ease with which the hose-side crest 13 is depressed and the release of the undercut portion, and is preferably 20 to 90 °, and particularly preferably 45 to 70 °.゜.

FIG. 8 is an explanatory diagram for explaining a hose manufacturing method according to another embodiment. The manufacturing method of FIG. 8 is a method of post-processing the shape of the hose-side peak 13 when the undercut angle θb of the hose-side peak 13 of the first hose 10 is large. That is, after forming a hose 10A having a right-angled triangular projection 13A without undercut, the vicinity of the projection 13A is heated and softened,
In this state, while being pressed from the end of the hose, the ridges 13 </ b> A are
Of the second inclined surface 13b. Thereby, the first hose 10 having the second inclined surface 13b is manufactured.

The present invention is not limited to the above embodiment, but can be implemented in various modes without departing from the gist of the invention. For example, the following modifications are possible.

(1) Hose side peak 1 of first hose 10
In addition to the above-described method, various methods such as an injection molding method, a method using centrifugal force, and a manual knitting method can be applied as a manufacturing method for forming 3. For example, in the method using centrifugal force, the mold shown in FIG. 7 is rotated in a state where the hose is heated so that the hose material is made to conform to the recess 53a by centrifugal force, or the outer side of the hose is moved to the upper mold 51. , While being held in a mold such as the lower mold 52,
By heating and rotating the hose material itself, the recess 5
3a can be adopted.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a hose connection structure according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a state before connecting a hose connection structure.

FIG. 3 is a side view showing the hose connection structure of FIG. 1;

FIG. 4 is an explanatory diagram for explaining a shape of a hose-side mountain portion 13 of the first hose 10.

FIG. 5 shows the connector-side engaging portion 26a of the connector 20 and the first
FIG. 3 is an explanatory diagram illustrating an operation of connecting a hose 10.

FIG. 6 is an explanatory diagram illustrating a connection operation following FIG. 5;

FIG. 7 is an explanatory diagram illustrating a blow molding method for manufacturing a first hose.

FIG. 8 is an explanatory view illustrating another method for manufacturing the first hose.

FIG. 9 is a sectional view showing a conventional hose connection structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... 1st hose 10A ... Hose 11 ... Passage 12 ... Hose main body 13 ... Hose side mountain part 13a ... 1st slope 13b ... 2nd slope 13A ... Mountain-like projection 18 ... 2nd hose 20 ... Connector 21 ... Connector body 21a ... opening 22 ... large diameter part 23 ... small diameter part 24 ... hose connection part 24a ... annular protrusion 24b ... passage 25 ... insertion space 26a, 26b, 26c ... connector side engagement part 43, 44 ... spacer 50 ... molding die 51 ... Upper mold 52 ... Lower mold 53 ... Cavity 53a ... Recess 61, 62 ... Mold P ... Parison

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F16L 33/28 F term (Reference) 3H017 DA01 3H111 AA02 BA11 BA15 CB02 CB14 CB28 CC01 DA26 3J106 AA02 AB01 BA01 BB01 BC04 BD01 BE12 BE32 EA03 EB03 EC01 EC06 ED12 EE02 EF04 EF05

Claims (2)

[Claims] 1. A hose connection structure for connecting a hose to a connector by press-fitting one end of the hose into the connector, wherein the connector has a connector-side engaging portion formed on the connector and protrudes from an outer peripheral surface of the one end of the hose. A hose-side crest engaged with the connector-side engaging portion; and sealing means for sealing between the hose and the connector when the connector-side engaging portion and the hose-side crest are engaged. Wherein the angle formed by the first sloped surface inclined from the outer peripheral surface of the hose to the opposite side to the insertion side of the connector, and the outer peripheral surface of the hose and the top of the first inclined surface are acute angles. The second
A hose connection structure characterized by being formed from an inclined surface. 2. A hose connected to the connector by engaging with a connector-side engaging portion formed on the connector, wherein the hose is protruded from an outer peripheral surface of the hose and engages with the connector-side engaging portion. The hose-side crest has an angle formed by a first inclined surface inclined from the outer peripheral surface of the hose to an opposite side to the insertion side of the connector, and an outer peripheral surface of the hose and a top of the first inclined surface. 2nd acute angle
A hose formed from an inclined surface.