JPH0716097U - Hose fittings - Google Patents

Abstract

(57) [Abstract] [Purpose] It is intended to provide a hose joint in which a soft hose can be easily attached and detached without using a tool, and a high sealing property can be secured. [Structure] A joint body 1 having a nipple 2 formed therein, a hose sleeve 3 fitted to the outer peripheral portion of the nipple 2 and contracted / expanded in the radial direction by a slit 32, and a tapered surface 3a on the outer periphery of the hose sleeve 3. Slide ring 4 to be fitted,
An elastic body 5 for urging the slide ring 4, an engaging groove 2a is provided around the outer periphery of the nipple 2, and convex portions 2b having a chevron cross section are provided around both sides of the engaging groove 2a. The corners of the apexes of the protrusions 2b are obtuse angles, and the protrusions 7 that engage with the engagement grooves 2a are formed on the inner circumference of the hose sleeve 3.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a hose joint, and more particularly to a hose joint in which a soft hose can be easily attached and detached.

[0002]

[Prior art]

 Conventionally, a joint for a soft hose used to supply gas, air, water, etc., is a bamboo shoot in which a groove 101b for preventing slippage and a mountain 101a are alternately provided around the outer periphery of the tip end as shown in FIG. It has a shaped nipple 101. The end of a soft hose 102 is fitted into and connected to the nipple 101 described above, and a hose band 103 is fitted around the outer circumference of the soft hose 102. The tightening screw 103a of the hose band 103 is attached to a tool such as a driver. The soft hose 102 is tightened from the outer periphery by tightening with.

[0003]

[Problems to be solved by the device]

 The hose joint described above requires a tool for tightening the tightening screw 103a of the hose band 103 when the hose a is attached, and the work of tightening the tightening screw 103a using the tool is troublesome. In addition, since a groove 101b and a mountain 101a for preventing slipping out are provided on the outer periphery of the nipple 101, it is extremely difficult to pull out the hose 102 from the nipple 101 when it is necessary to remove the hose 102. It was Some of the above nipples do not have irregularities on their outer circumferences to prevent them from slipping out, and the outer peripheral shape of the pipe is kept smooth. However, it may become difficult to pull it out due to the larger area.

Further, as a joint for a hard hose, a cylindrical joint body is fitted on the outer peripheral portion of the hard hose, and a claw provided on the inner periphery of the joint body is detachably attached to the outer peripheral surface of the hard hose. There is a fitting that can be installed with one touch by inserting it (not shown), but if you divert the above fitting to a soft hose as it is, the hose may come off due to an increase in internal pressure of the hose. Due to the elasticity of the soft hose, a gap may be created on the seal surface and water or air may leak.

An object of the present invention is to provide a hose joint in which a soft hose can be easily attached and detached without using a tool and a high sealing property can be secured.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the hose joint of the present invention is fitted with a substantially tubular joint body in which a nipple for connecting a hose is projectingly formed at the tip portion and an outer periphery of the nipple with an appropriate gap. , A hose sleeve that reduces / expands in the radial direction by slitting, a slide ring that fits into a tapered surface formed on the outer peripheral surface of the hose sleeve, and a slide ring that slides in the large diameter direction of the tapered surface. And an engaging groove is provided around the outer periphery of the nipple, and convex portions having a chevron cross-section with the side edges of the engaging groove as apexes are formed on both sides of the engaging groove. In addition to being provided circumferentially, the corners of the apexes of these protrusions are made obtuse, and the inner periphery of the hose sleeve is formed with a protrusion that engages with the engagement groove from the outer periphery.

[0007]

[Action]

 According to the above means, the hose sleeve is fitted on the outer periphery of the nipple with an appropriate gap corresponding to the wall thickness of the hose. Therefore, when the hose is inserted into the outer circumference of the nipple and connected, the hose sleeve fits around the outer circumference of the hose connected to the nipple. The above-mentioned hose sleeve is provided with a slit, and the sleeve deforms so as to reduce or expand in the radial direction. Further, a tapered surface is formed on the outer peripheral surface of the hose sleeve, and a slide ring is fitted to the tapered surface from the outer peripheral portion. The slide ring is urged to slide in the large diameter direction of the tapered surface by the urging force of the elastic body. This urging force causes the slide ring to slide in the large diameter direction of the tapered surface, whereby the hose sleeve is contracted by the engagement of the inner circumference of the ring and the tapered surface, and the hose sleeve is reduced in diameter. To transform.

An engaging groove is provided around the outer periphery of the nipple to which the hose is connected, and a convex strip that engages with the engaging groove is formed on the inner periphery of the hose sleeve. Therefore, when the hose sleeve shrinks due to the urging force of the elastic body as described above, the ridge on the inner circumference of the hose sleeve presses the hose fitted into the nipple so as to tighten it from the outer circumference, so that the hose inside the engaging groove on the outer circumference of the nipple. Let it bite into. As described above, the hose connected to the nipple is bitten into the engaging groove on the outer periphery of the nipple by tightening with the ridge so that the inner periphery of the hose firmly adheres to the outer periphery of the nipple without any gaps, and high sealing performance is obtained. .

Further, when the slide ring is retracted against the urging force of the elastic body, the hose sleeve diameter increases and the tightening of the outer periphery of the hose is released. Therefore, when connecting or disconnecting the hose, pull out the hose from the nipple with the slide ring retracted.

On both side edges of the engagement groove provided around the outer periphery of the nipple, convex portions having a mountain-shaped cross section having the side edge as the vertex are circumferentially provided, and the corners of the convex portions have obtuse angles. It is done in As a result, the hose fitted to the outer periphery of the nipple is connected in such a manner that it is inflated from the inside by the apexes of both convex portions sandwiching the engaging groove. When attaching or detaching the hose to or from the nipple, the hose is inserted / removed in a state where the inner peripheral surface of the hose is in contact with the apexes of the above-mentioned convex portions. At that time, the frictional resistance generated between the inner peripheral surface of the hose and the peaks of both convex parts is small because the peaks of both convex parts that are contact parts are obtuse angles, and they are not caught on the inner peripheral surface of the hose. Absent.

[0011]

[Effects of the Invention] Since the present invention is configured as described above, it is not necessary to use a tool like a conventional joint, and the soft hose can be easily attached and detached by simply sliding the slide ring. Can be done. Furthermore, in the connected state of the hose, the hose can be tightly fitted around the outer circumference of the nipple by tightening the convex portion of the hose sleeve with respect to the engaging groove to ensure high sealing performance. The hose is connected to the nipple in such a way that the vertices of the convex parts that form an obtuse angle with the inner peripheral surface of the hose come into contact and the hose is inflated from the inside. It is possible to suppress the frictional resistance generated when the hose is pulled down, and at the same time, the projection is not caught on the inner peripheral surface of the hose, so that the hose can be smoothly inserted and removed.

[0012]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. The hose joint shown in FIG. 1 includes a joint body 1 having a nipple 2 for connecting a soft hose a formed at its tip, a hose sleeve 3 fitted around the outer periphery of the nipple 2 with an appropriate gap, and the hose sleeve. The slide ring 4 is fitted to the taper surface 3a formed on the outer periphery of the slide ring 3, and the elastic body 5 urges the slide ring 4.

The joint holding body 1 is formed in a substantially tubular shape, and has a threaded portion 1a for screwing and connecting to an instrument or the like at a base end thereof, and a nipple 2 integrally formed at a tip end thereof to form a shaft core. A through hole 1b is formed so as to extend along the above.

The nipple 2 is formed in a tubular shape having a diameter slightly larger than the inner diameter of the hose a, and a fitting groove 6 for fitting the hose sleeve 3 therein is provided around the base end portion of the nipple 2. Engaging grooves 2a are provided around. On both sides of the engaging groove 2a, convex portions 2b having a chevron cross-section are provided so as to sandwich the groove 2a, and both side edges of the engaging groove 2a are formed as apexes of the convex portions 2b. There is. Further, both convex portions 2b have an apex angle of an obtuse angle, and the surface opposite to the engaging groove 2a is projected so as to be gently inclined toward the distal end and the proximal end of the nipple 2. As a result, the outer peripheral surface of the nipple 2 swells gently with the engaging groove 2a at the center, and the hose a can be easily inserted and removed as will be described later.

As shown in FIGS. 1 and 2, the hose sleeve 3 is fitted on the outer periphery of the nipple 2 with a gap corresponding to the wall thickness of the hose a, and has a substantially cylindrical outer shape. A locking piece 31 that hooks in the fitting groove 6 at the base end portion of the nipple 2 is provided around the rim portion of the base end portion. Further, along the inner peripheral surface on the tip side of the hose sleeve 3, there is provided a ridge 7 which is pressed from the outer periphery to the engaging groove 2a on the outer periphery of the nipple 2, and the outer peripheral portion has a tip. A tapered surface 3a is formed whose diameter increases toward the end.

The hose sleeve 3 has a slit 32 running in the axial direction, which is cut out in the outer peripheral portion of the hose sleeve 3 except for the rim of the base end portion provided with the locking piece 31. In the case of the hose sleeve 3 of the present embodiment, eight slits 32 are formed by cutting out at regular intervals in the circumferential direction, and these slits 32 allow the caliber on the tip side where the ridges 7 are provided. It elastically deforms so that it expands as shown in FIG. 2 or contracts as shown in FIG. Incidentally, the number of the above-mentioned slot 32 is increased or decreased according to the size of the hose a.

The slide ring 4 is slidably fitted on the outer peripheral portions of the hose sleeve 3 and the joint body 1. The cylindrical slide ring 4 is formed with a taper mouth 4a fitted to the outer circumference of the taper surface 3a provided on the outer circumference of the hose sleeve 3 on the inner circumference of the tip end, and a C ring 8 fitted to the inner circumference of the base end mouth. By engaging the locking projections 11 projecting on the outer periphery of the joint body 1 so that the slide ring 4 and the outer periphery of the joint body 1 are fitted so as to slide in the axial direction with a constant stroke. There is. A coil spring 5 is elastically mounted in a compressed state between the corner of the inner circumference of the slide ring 4 and the hooking projection 11 of the joint body, and the taper opening of the slide ring 4 is reinforced by the repulsive force of the coil spring 5. The portion 4a is slid toward the large diameter side of the tapered surface 3a of the hose sleeve 3 so that the hose sleeve 3 is constantly urged in the direction of contraction.

When the hose sleeve 3 is contracted by the biasing force of the coil spring 5 as described above, the ridge 7 formed on the inner circumference of the hose sleeve 3 tightens the hose a fitted into the nipple 2 from the outer circumference. In this way, the hose a is bitten into the engagement groove 2 on the outer peripheral portion of the nipple 2. As a result, the inner peripheral surface of the hose a tightly adheres to the inside of the engagement groove 2a without any gap, and high sealing performance is secured. Further, by sliding the slide ring 4 toward the base end of the joint as shown in FIG. 2, the tightening from the outer periphery of the hose sleeve 3 is released, and the hose sleeve 3 is expanded. In this state, the hose a can be inserted and removed.

As described above, the biconvex portions 2b on the outer circumference of the nipple 2 have an obtuse angle at the apex, and the surface opposite to the engaging groove 2a is gently inclined toward the front end and the base end of the nipple 2. Thus, the outer peripheral surface of the nipple 2 is configured to swell gently with the engaging groove 2a at the center.

That is, the hose a inserted into the outer periphery of the nipple 2 formed as described above is connected in such a manner that it is inflated from the inside by the apex portions of the convex portions 2b sandwiching the engagement groove 2a. Therefore, when the hose a is attached / detached to / from the nipple 2, the inner peripheral surface of the hose a is inserted / removed while being in contact with the apex formed at an obtuse angle as described above. The frictional resistance generated between the inner peripheral surface and the outer peripheral surface of the nipple 2 is due to that the hose a swells due to the outer shape of the both convex portions 2b and that the apex portion of the both convex portions 2b which is the maximum diameter portion has an obtuse angle. It becomes very small, and it is possible to prevent the hose a from being caught on the inner peripheral surface. As a result, the hose a can be smoothly inserted into and removed from the nipple 2.

In the above embodiment, the hose sleeve 3 is attached to the nipple 2 by fitting the locking piece 31 of the hose sleeve 3 into the fitting groove 6 at the base end of the nipple 2. The hose sleeve 3 may be integrally formed with the nipple 2. This will reduce the number of parts and the number of assembly.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a joint embodying the present invention.

FIG. 2 is a vertical cross-sectional view showing the joint with the hose sleeve enlarged.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a vertical sectional view of a hose sleeve.

FIG. 5 is a vertical sectional view showing a conventional joint.

[Explanation of symbols]

 a ... Hose 1 ... Joint body 2 ... Nipple 2a ... Engagement groove 2b ... Convex part 3 ... Hose sleeve 3a ... Tapered surface 4 ... Slide ring 5 ...・ Coil spring 7 ...

Claims (1)

[Scope of utility model registration request] 1. A fitting body having a substantially tubular shape in which a nipple for connecting a hose is formed in a projecting manner at a tip end thereof, and fitted around the outer circumference of the nipple with an appropriate gap, and reduced / expanded in a radial direction by slitting. The nipple includes a hose sleeve, a slide ring fitted to a tapered surface formed on the outer peripheral surface of the hose sleeve, and an elastic body for urging the slide ring to slide in the large diameter direction of the tapered surface. An engaging groove is provided around the outer peripheral portion of the engaging groove, and convex portions having a chevron cross-section with the side edge portions of the engaging groove as apex are provided on both sides of the engaging groove, and the apex portions of these convex portions are formed. A hose joint in which each corner is an obtuse angle, and a ridge that engages with the engaging groove from the outer circumference is formed on the inner circumference of the hose sleeve.