JPH0752469Y2 - Drain hose fitting - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage hose joint, and more particularly to a drainage hose joint in which the drainage hose can be easily attached to and detached from a nipple of a drainage device.

[0002]

2. Description of the Related Art Some of the drainage hoses used for draining civil works have a thin wall and can be folded. This drainage hose is lightweight and has the advantage that it can be crushed and folded in the radial direction and thus has a good storability, and is now widely used. Conventionally, when connecting the drain hose described above to, for example, a drain pump,
Insert the drainage hose into the nipple of the hose connection port of the drainage pump and wind it with wire material such as wire from the outer periphery to tighten it, or attach the hose band to the drainage hose inserted into the nipple and tighten it with a tool such as a screwdriver. Was there.

[0003]

[Problems to be Solved by the Invention] However, if a wire or hose band is used to connect the drain hose as described above, the wire used for tightening is cut and disposed of after each operation, or a tool is used. Since it is necessary to attach and detach the band, the work of attaching the drainage hose and the work of covering it were very troublesome.

Since the drainage hose is thin, if it is tightened with a metal product such as a wire or a hose band, the end of the hose may be damaged immediately and damage or water leakage may occur. Therefore, it was necessary to periodically cut off the end of the drain hose for use. Further, since the drainage hose described above is thin, it is easily deformed, and the work of inserting the hose into the nipple may not be easily performed. Furthermore, considering the insertion of the hose, the diameter of the nipple at the connection port is made slightly smaller than the inner diameter of the drain hose, so even if the drain hose is tightened from the outer circumference with a wire or hose band, there will be a gap. Water leakage may occur.

An object of the present invention is to provide a hose joint which enables easy attachment / detachment work of a drain hose without using a tool and which can secure a high sealing property without water leakage at a connecting portion. It is in.

[0006]

In order to achieve the above-mentioned object, a drainage hose joint of the present invention has a hose connecting portion at one end and a nipple connecting portion at the other end of a joint body formed in a substantially tubular shape. The hose connecting portion is detachably mounted, and the hose connecting portion is fitted to the outer periphery of the projecting opening formed at the one end opening of the joint body and to the outer periphery of the hose sleeve with a predetermined gap. The other end is formed of a first cap nut screwed onto the outer periphery of one end of the connection joint, and the hose sleeve is provided with a slit so that the one end of the sleeve can be expanded / reduced in the radial direction. A taper surface that expands toward the other end is formed on the inner circumference of the sleeve to engage with the tip end portion of the projecting opening, and a hook portion that receives the thrust biasing force from the first cap nut is provided on the outer circumference of the hose sleeve. On the other hand, the nipple connection is A tubular elastic packing body that fits into a nipple on the water appliance side, a packing sleeve into which the elastic packing body fits, and a second cap nut that fits into the outer circumference of the packing sleeve. Engages with the tapered surface of the inner circumference of the second cap nut, which is formed so that the other end of the sleeve can be contracted / expanded in the radial direction and the outer peripheral portion of the packing sleeve is contracted toward one end. It is something that can be done.

[0007]

According to the above means, a hose connecting portion for connecting a drain hose is provided at one end of the joint body, and a nipple connecting portion for connecting to a nipple of a drainage device is provided at the other end of the joint body. It is detachably attached. Insert the drainage hose into the outer peripheral surface of the hose sleeve of the hose connection part, fit the first cap nut to the outer peripheral surface, screw the other end of the ring into the one end of the joint body, and tighten it First
The hose sleeve that receives the thrust biasing force from the cap nut moves toward the other end of the joint body. At the same time, the taper surface provided on the inner peripheral surface of the hose sleeve is pressed against the tip of the projecting port at one end of the joint body. As a result, the hose sleeve is expanded from the inside by the projecting port and the diameter is expanded. The drain hose inserted into the hose sleeve is pressed against the inner peripheral surface of the first cap nut due to the increased diameter of the hose sleeve. Therefore, the connection end of the drainage hose is crimped from the inside and outside by the outer peripheral surface of the hose sleeve and the outer peripheral surface of the first cap nut, and the airtightness is maintained by this crimping to prevent slippage.

On the other hand, in the nipple connecting portion, the other end port is inserted into the nipple of the drainage device, the elastic packing body is fitted to the outer peripheral surface of the nipple, and then the second cap nut is tightened to the joint body. By this tightening, the second cap nut slides toward one end of the joint body, and the taper surface provided on the inner peripheral surface of the ring moves so as to compress the packing sleeve into which the elastic packing body is fitted from the outer peripheral surface. Then, when the diameter of the packing sleeve is reduced by the movement of the tapered surface, the packing fitted in the sleeve is pressed against the outer peripheral surface of the nipple, and the elastic packing body elastically adheres to the outer peripheral surface of the nipple to ensure airtightness. It will be retained.

[0009]

Since the present invention is configured as described above, the joint of the present invention is preliminarily attached to the connection end of the drain hose so that the nipple connection part is fitted to the nipple of the drain pump or the like. After that, the drain hose can be easily connected by simply tightening the second cap nut manually. Further, after the work is completed, the hose can be pulled out without resistance from the nipple of the drainage pump or the like simply by loosening the second cap nut. Therefore, without using a tool like a conventional joint, it is possible to smoothly attach and detach the drain hose by mounting it on a nipple such as a drain pump.
The efficiency of drainage work can be greatly improved. Also,
The airtightness of the nipple connecting portion is performed by elastically pressing the elastic packing body from the outer peripheral surface to the outer peripheral surface of the nipple, so that a high degree of adhesion and good sealing performance can be maintained. Further, unlike the conventional case, there is no problem that the end of the drainage hose is damaged by being tightened, and the durability of the hose is improved and more economical use becomes possible. Further, the airtightness of the hose connection is performed by expanding the hose sleeve in the radial direction and crimping the drainage hose to the inner peripheral surface of the first cap nut, so that a gap may occur around the hose. It is possible to maintain high airtightness at the drain hose connection part. Further, when the hose is inserted, the diameter of the hose sleeve can be made sufficiently small, so that the drain hose can be smoothly inserted into the hose sleeve.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The drainage hose joint shown in FIGS. 1 and 2 has a hose connecting portion 2 attached to one end opening of a joint body 1 formed in a substantially tubular shape, and a nipple connecting portion 3 at the other end opening of the joint body 1. It is configured by mounting.

The joint body 1 is a thick-walled tube body having a through hole 1a formed therethrough along the shaft core, and a receiving port portion 11 is formed at one end thereof so as to extend the through hole 1a. is there.
Further, the first cap nuts 2 are provided on the outer peripheral surfaces of both ends of the joint body 1.
2, screw parts 12 and 13 into which the second cap nut 33 is screwed are formed.

The hose connecting portion 2 attached to one end of the joint body 1 is for connecting a drain hose to the joint, and is a hose sleeve fitted to the outer peripheral surface of the projecting port 11 of the joint body 1. 21 and a first cap nut 22 fitted on the outer peripheral surface of the hose sleeve 21. The hose sleeve 21 is a cylindrical body into which the connection port of the drain hose a is inserted, and has a diameter slightly smaller than the inner diameter of the drain hose a so that the hose a can be easily inserted. As shown in FIG. 2, the hose sleeve 21 is formed such that the outer diameter thereof is slightly reduced toward the one end opening, and a groove 25 is provided on the outer peripheral surface of the hose sleeve 21. A collar 21 is provided around the collar. In addition, on the outer peripheral surface of the hose sleeve 21, several slits 24 extending from the front of the other end to the edge of the one end are formed at regular intervals in the circumferential direction. Is configured to elastically expand / shrink. The inner peripheral surface of the hose sleeve 21 is formed with a taper surface 23 whose diameter decreases toward the one end, and the central portion of the taper surface 23 is brought into contact with the tip end of the projection opening 11 of the joint body 1. I'm in contact.

The first cap nut 22 is a cylindrical body fitted into the outer peripheral surface of the hose sleeve 21 with a gap somewhat larger than the wall thickness of the drainage hose a, and the inner peripheral surface of the outer peripheral surface of the hose sleeve 21. A ridge 27 for tightening from the outer peripheral surface is provided around the concave groove 25 of the surface, and the outer peripheral surface is processed to be non-slip. In addition, the first cap nut 22
A female screw portion 28 is formed on the inner peripheral surface of the other end opening of the first cap nut 22 and the other end opening of the first cap nut 22 is formed on the outer peripheral surface of the joint body 1 at one end.
Screw on. In the fitted state, the first cap nut 22 is configured such that the step portion 29 formed on the inner peripheral surface abuts on one end surface of the hook collar 26 of the hose sleeve 21. Therefore, when the first cap nut 22 is screw-fastened to the joint body 1, the locking collar 26 is attached to the step portion 29.
The hose sleeve 21 to which the lock is engaged moves toward the one end side, and the engagement position between the tapered surface 23 and the tip of the projecting port 11 is shifted to the smaller diameter side of the tapered surface 23. As a result, the hose sleeve 21 expands, and the drainage hose a fitted to the outer peripheral surface of the hose sleeve 21 is crimped to the inner peripheral surface of the first cap nut 22 without any gap. At the same time, the drain hose a is crimped from the inside and outside by the outer peripheral surface of the hose sleeve 21 and the inner peripheral surface of the first cap nut 22, and the ridge 27 of the first cap nut 22 connects the drain hose a to the groove on the outer peripheral surface of the hose sleeve 21. The inside of 25 is bitten to further enhance the sealing property of the hose a connecting portion.

On the other hand, the nipple connecting portion 3 attached to the other end of the joint body 1 has the joint body 1 attached to the end portion of the drainage hose a as described above with respect to the nipple b constituting the drainage port of the drainage pump. It is for detachable fitting,
A packing body 31 fitted on the outer peripheral surface of the nipple b, a packing sleeve 32 fitted on the packing body 31, and a second cap nut 3 fitted on the outer peripheral surface of the packing sleeve 32.
The packing body 31 composed of 3 and 3 is a thick-walled cylindrical body made of elastic rubber, has an inner diameter such that the outer circumference of the nipple b can be reasonably fitted, and the inner circumference of the packing sleeve 32. Fit in close contact. The packing sleeve 32 is a tubular body into which the packing body 31 is fitted, and a return piece 34 is provided around the inner peripheral surface of the one end opening. A plurality of slits 35 are formed on the outer peripheral surface of the packing sleep 32 as in the case of the hose sleeve 21, and the diameter of the other end is reduced / expanded together with the packing body 31.

The second cap nut 33 is in a tubular state in which the packing sleeve 32 is fitted inside and is screwed into the other end opening portion of the joint body 1, and one end opening thereof is screwed into the thread portion 13 of the joint body 1. While forming the threaded portion 36, a taper surface 37 whose diameter decreases toward the other end is provided around the inner peripheral surface of the other end opening. Further, the outer peripheral surface of the second cap nut 33 is also processed to prevent slippage. The second cap nut 33 is mounted by screwing the female screw portion 35 into the screw portion 13 at the other end opening of the joint body 1 with the packing sleeve 32 fitted therein. In the mounted state, the packing sleeve 32 fitted in the second cap nut 33 has one end surface abutting on the other end surface of the joint body 1 and the other end opening on the tapered surface 37 of the inner peripheral surface of the second cap nut 33. Abut.

When the second cap nut 33 is screwed onto the joint body 1 after connecting the nipple connecting portion 3 to the nipple b of the drainage device, the taper surface 37 on the inner peripheral surface of the second cap nut 33 causes the joint body to move. The packing sleeve 32 is tightened from the outer peripheral surface by moving toward the 1 side. As a result, the diameter of the other end of the packing sleeve 32 is reduced, and the packing body 31 is strongly pressed against the outer peripheral surface of the nipple b. The packing body 3
No. 1 elastically adheres to the outer peripheral surface of the multi-stage nipple b without any gap, and high sealability is obtained.

The drain hose joint configured as described above is connected in advance to the connection end of the drain hose a as shown in FIG. Then, when working, the drain blush tool b
After inserting the nipple connection part 3 into the
The drain hose a can be easily connected by simply tightening. Also, after the work is completed, the second cap nut 3
The drain hose a can be pulled out from the nipple b without resistance simply by loosening 3.

[Brief description of drawings]

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

FIG. 2 is a vertical sectional view showing the joint in an exploded manner.

FIG. 3 is a perspective view showing a drain pump and a drain hose.

[Explanation of symbols]

 a ... Drainage hose b ... Nipple 1 ... Joint body 2 ... Hose connection part 3 ... Nipple connection part 11 ... Protrusion port 21 ... Hose sleeve 22 ... First bag Nut 26 ... Latching collar 31 ... Packing body 32 ... Packing sleeve 33 ... Second cap nut

Claims (1)

[Scope of utility model registration request] 1. A hose connecting portion is detachably attached to one end of a joint body formed in a substantially tubular shape, and a nipple connecting portion is detachably attached to the other end of the joint body. The hose connecting portion is attached to one end of the joint body. A hose sleeve fitted to the outer circumference of the projecting opening formed in a projecting manner, and a first cap nut fitting to the outer circumference of the hose sleeve with a predetermined gap and screwing the other end opening portion to the outer circumference of one end of the connection joint. A slot is provided on the hose sleeve so that the one end opening of the sleeve can be expanded / reduced in the radial direction, and a taper surface that expands toward the other end is formed on the inner circumference of the hose sleeve to form the protrusion. A hooking portion that engages with the tip of the mouth and receives the thrust biasing force from the first cap nut is provided on the outer circumference of the hose sleeve, while the nipple connecting portion is
A tubular elastic packing body that fits into the nipple on the drainage device side, and a packing sleeve that internally fits the elastic packing body,
A second cap nut fitted to the outer circumference of the packing sleeve, and the packing sleeve is provided with a slit so that the other end of the sleeve can be contracted / expanded in the radial direction. A drainage hose joint that is engaged with a tapered surface of the inner circumference of a second cap nut that is formed to expand toward one end.