JPH02256993A - Hose connecting device - Google Patents

Abstract

PURPOSE:To prevent the leakage of liquid by interposing a compression coil spring between a connection body inner side end face and an insert unit end face, in the case of a hose connecting device comprising a connection body, insert unit, O ring, union nut and a sleeve. CONSTITUTION:A cylindrical connection body 3 with its outside threaded, having a connector in the one end part and a fitting part 43 in an inside in the other end part, is provided, and an inert unit 4, having in its one end part a tapered part 41, is fitted to the fitting part 43 of the connection body 3. The insert unit 4 is fixed to the connection body 3 by a union nut 7 while providing an O ring 5 in the fitting part of the connection body 3 to the insert unit. By screwing the union nut 7, a hose 1 is pressed to the insert unit 4 by a sleeve 6. Further a compression rubber 8 is interposed between internal end faces of the connection body 3 and the insert unit 4. As a result, fluid can be prevented from its leak even with unevenness in the thickness of the hose.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention provides a method for connecting a hose to a connected object through a pair of connectors attached to the end of the hose and between the hose and the connected object. The present invention relates to a hose connection device for making the connection.

[Conventional technology]

As this type of hose connection device, the one shown in FIGS. 5 and 6 is known. In the figure, reference numeral 1 denotes a hose connected to a not-shown connected object via a hose connection device 2. As shown in FIG. The hose connection device 2 is constructed as follows. That is, the cylindrical connection body 3 has a hexagonal head 31 on the outer periphery so that a spanner can be applied to it, and a tapered male thread 32 on the negative end that forms a pair of connectors together with the tapered female thread of the object to be cooled. have,
Furthermore, a fitting part 3 that forms a cylindrical inner surface inside the other end
3 and also has a thread 34 on the outside. Similarly, the cylindrical insert 4 has one end formed with a tapered part 41 that is inserted into the end of the hose 1, and the other end that fits into the fitting part 33 and has an O-ring groove on the outer periphery. 42 is provided. 5 is inserted into the O-ring groove 42, and the fitting part 33 and 4
The O-ring 6, which maintains watertightness between the hose 1 and the hose 1, has a tapered portion 61 on its inner surface, and is provided with an end surface 63 formed by a step on the outer periphery, and is a sleeve that is fitted over the outer periphery of the end of the hose 1. The union nand 7, which has a hexagonal outer shape, is connected to the male thread 3.
4, a circular fitting portion 72 that fits into the outer peripheral portion 62 of the sleeve 6 with an appropriate tightness, and an end surface 73 formed with a step at the end.

The above-mentioned hose connection device 2 has a union that is inserted and supported in advance on the hose 1 side after the tapered part 41 is inserted into the end of the hose 1 and the insert body 4 into which the O-ring 5 is inserted is fitted into the connection body 3. Screw the nut 7 into the connection body 3 until its end surface abuts the end surface of the connection body 1, press the end of the hose 1 against the insert 4 through the sleeve 6, and remove the insert 4 from the connection body 3. It is held so that it does not come out. Further, watertightness between the connecting body 3 and the insert body 4 is ensured by the O-ring 5. By threading the tapered male thread 32 and the tapered female thread in a watertight manner, the hose 1 is connected to the object to be connected, and watertightness inside and outside the hose connecting device 2 is ensured.

[Problem to be solved by the invention]

By the way, in the conventional hose connection device 2, if there is slight variation in the flesh pressure of the hose l, even if the union nand 7 is tightened, the tapered part 61 of the sleeve 6 and the tapered part 4 of the insert body 4
1, the pressure of the fluid flowing through the hose 1. In this case, a tightening force greater than the water pressure may not be applied to the hose 1, and water may leak through the tapered portion.

This invention allows even if there are slight variations in the wall thickness of the hose,
It is an object of the present invention to provide a hose connection device that can tighten a hose with a required force and prevent fluid leakage.

[Means to solve the problem]

In order to achieve the above object, the present invention includes a connector that is attached to an end of a hose and that forms a pair with that of an object to be connected, and connects the hose to the object via the pair of connectors. a cylindrical connection body that is used to connect to a connected object, has the connector at one end, a fitting part on the inside of the other end, and a thread on the outside; and an end of the hose. an insert body having a tapered part at one end to be inserted into the connecting body, and a fitting part at the other end to removably fit into the fitting part of the connecting body; an O-ring provided between the refitting portion of the body, a union nut that screws into the thread of the connection body and fixes the insert to the connection body, and an inner surface of the union nut and an outer surface of the hose end. In a hose connection device consisting of a sleeve that is inserted between the ends of the hose and presses the end of the hose against the insert by screwing a union nut, the hose connection device includes a sleeve that is inserted between the end surface of the fitting portion inside the connection body and the end surface of the fitting portion of the insert A compression coil spring is installed as an intervening device, or a connector is provided that is attached to the end of the hose and forms a pair with that of the object to be connected, and the hose is connected to the object through the pair of connectors. a cylindrical connection body used to connect to the body, having the connector at one end, a fitting part on the inside of the other end, and a thread on the outside; It has a tapered part at one end that is inserted and fixed,
an insert body having a fitting part on the other end that removably fits into the fitting part of the connection body; an O ring provided between the connection body and the refitting part of the insert body; A hose connection device comprising a union nut that is threaded onto a thread of a connection body and fixes the insert to the connection body,
A hose clamp is provided on the outer periphery of the end of the hose and presses the end against the tapered portion of the insert.

[Effect]

In the former case, the spring force of the coil spring acts in a direction to narrow the gap between the tapered part of the insert and the tapered part of the sleeve, thereby generating the necessary tightening force even for a thin-walled hose. In the latter case, the hose bond can be tightened according to the wall thickness of the hose. The hose is thus secured to the insert with the necessary clamping force.

〔Example〕

1 and 2 show a first embodiment of the present invention, and parts common or identical to those in FIGS. 5 and 6 are designated by the same reference numerals.

1 and 2, a cylindrical spring support 35 is provided on the inner peripheral side of the connection body 3 so as to form a ring-shaped recess between the connection body 3 and the fitting portion 33. 8 has the required spring force, and the end face 33a of the fitting part 33 of the connecting body 3 and the insert body 4
This is a compression coil spring that is supported by a spring support 35 and installed between the end face 43a of the fitting part 43 and the end face 43a of the fitting part 43.

In the above configuration, if the hose 1 is thick,
As shown in FIG. 1, by screwing in the union nut 7, the end of the hose 1 is crimped between the tapered portion 41 of the insert 4 and the tapered portion 61 of the sleeve 6 with sufficient force.
And the compression coil spring 8 is compressed. When the wall thickness of the hose 1 is thin, when the union nut 7 is screwed in as shown in FIG. 2, the compression coil spring 8 pushes the insert body 4 toward the sleeve 6 side in proportion to the thin wall thickness. . Therefore, the gap between the tapered part 41 and the tapered part 61 is closed, and the end of the hose 1 is crimped with sufficient force.

As described above, even if the hose I has variations in wall thickness, it is fixed between the insert 4 and the sleeve 6 with sufficient force, so that no water leaks from the hose connection device 2.

Next, a second embodiment of the present invention will be described based on FIGS. 3 and 4. In this embodiment, the sleeve (FIG. 5, 6) in the conventional hose connection device is eliminated. Connection body 3
In this case, instead of the O-ring groove (FIG. 5, 42) of the insert 4, an O-ring groove 36 is formed on the end surface 33a opposite to the end surface 43a of the insert 4, and the O-ring 5 is inserted therein. The tapered portion 41 of the insert 4 is formed to have a sawtooth cross section so that the hose 1 is difficult to come off. An end surface 73 formed by providing a step at the end of the union nut 7 engages with an end surface 43b formed at the rear end of the fitting portion 43 of the insert body 4. Reference numeral 9 denotes a generally commercially available ring-shaped hose clamp, which is attached to the outer periphery of the end of the hose 1, and the diameter of the ring can be changed by screwing or loosening a bolt 91 into a nut to which it is screwed.

In the above-described configuration, by screwing the union nut 7 into the connection body 3, it is pressed toward the connection body 3 along the axis. Thus, watertightness between the connecting body 3 and the insert body 4 is ensured by the O-ring 5. - The hose 1, into which the tapered part 41 of the insert 4 is inserted, is crimped onto the insert 4 with the necessary tightening force by the clamp 9 into which the bolt 91 is screwed. In this case, even if there is variation in the wall thickness of the hose 1, it is adjusted by the threaded length of the bolt 91, and the appropriate tightening force is ensured regardless of the variation in the wall thickness. Therefore, water does not leak from the hose connection device 2.

Furthermore, the hose connection device 2 according to the second embodiment provides the following advantages. First, when it is desired to separate the connection body 3 and the insert body 4 in a system where the piping of the pump 10 shown in FIG. 4 is performed using the hose connection device 2 (FIG. 1) according to the first embodiment, As shown in FIG. 4, after removing the union nut 7 from the connection body 3, the insert member 4 must be pulled out in the axial direction.For this purpose, the pump 10 must be removed from the base 101, which is a complicated operation. Requires.

However, in the hose connection device 2 according to the second embodiment, if the union nut 7 is removed from the connection body 3 in the above case, the insert 4 can be moved laterally and separated from the connection body 3. That is, when the pipe is in use, the insert 4
It has the advantage that it can be attached and detached from the connection body 3 very easily.

〔Effect of the invention〕

According to this invention, the hose is provided with a pair of connectors that are attached to the end of the hose and that are connected to the object to be connected, and the hose is connected to the object to be connected through the pair of connectors. a cylindrical connection body that has the connector on one end, a fitting part on the inside of the other end, and a thread on the outside, and a tapered part that is inserted into the end of the hose. at one end, and a fitting portion at the other end that removably fits into the fitting portion of the connection body, and a refitting portion of the connection body and the insertion body. An 0 ring provided between the
A union nut that is screwed into the thread of the connection body and fixes the insert body to the connection body; and a union nut that is inserted between the inner surface of the union nut and the outer surface of the hose end, and the hose end is inserted by screwing the union nut. In a hose connection device consisting of a sleeve that is pressed against the body, a compression coil spring is interposed between the end face of the fitting part inside the connection body and the end face of the fitting part of the insert body, or a compression coil spring is installed at the end of the hose. The hose is attached to the body and has a pair of connectors, and is used to connect the hose to the body through the pair of connectors, and has the connection at one end. a cylindrical connection body having a fitting part on the inside of the other end and a thread on the outside, and a tapered part at one end to be inserted and fixed into the end of the hose,
an insert body having a fitting part that removably fits into the fitting part of the connecting body at the other end; and an O-ring provided between the fitting part of the connecting body and the insert body; A hose connection device comprising a union nand that is screwed into the thread of the connection body and fixes the insert to the connection body, wherein the union nand is attached to the outer periphery of the end of the hose and the end is connected to the tapered part of the insertion body. Since it is equipped with a hose clamp that presses the hose, even if the wall thickness of the hose varies,
In the former case, the force of a compression coil spring is applied to secure the insert and the sleeve between the tapered parts with sufficient force, while in the latter case, the hose clamp always holds the insert with the required tightening force. It is crimped.

Fluid leakage from the hose connection device is thus prevented.

[Brief explanation of drawings]

1 and 2 show a hose connection device according to a first embodiment of the present invention, FIG. 1 is a cross-sectional view when a thick-walled hose is connected, and FIG. 2 is a cross-sectional view when a thick-walled hose is connected. 3 is a sectional view of a hose connection device showing a second embodiment of the present invention, and FIG. 4 shows defects in the hose connection device of the first embodiment compared to the hose connection device of the second embodiment. FIG. 5 is a sectional view of a conventional hose connection device, and FIG. 6 is a front view of the same. DESCRIPTION OF SYMBOLS 1...Hose, 2...Hose connection device, 3...Connection body, 4...Insert body, 5...0 ring, 7...
Union nut, 8...Compression coil spring, 9...Bose clamp, 32...Tapered male screw (connector), 3
3... Fitting part, 43... Fitting part. Figure 3 Figure 4

Claims (1)

[Scope of Claims] 1) A connector that is attached to an end of a hose and that forms a pair with a connected object, and connects the hose to the connected object via the pair of connectors. A cylindrical connecting body having the connector on one end, a fitting part on the inside of the other end, and a thread on the outside, and inserted into the end of the hose. An insert body having a tapered part at one end and a fitting part at the other end that removably fits into the fitting part of the connection body, and both the connection body and the insert body are fitted together. an O-ring provided between the parts, a union nut that is screwed into the thread of the connection body and fixes the insert to the connection body, and inserted between the inner surface of the union nut and the outer surface of the hose end, In a hose connection device comprising a sleeve that presses the end of the hose against the insert by screwing a union nut, a compression coil spring is interposed between the end surface of the fitting portion inside the connection body and the end surface of the fitting portion of the insert. A hose connection device characterized by having been installed. 2) a connector that is attached to the end of the hose and that forms a pair with the object to be connected, and is used to connect the hose to the object through the pair of connectors; A cylindrical connection body having the connector at one end, a fitting part on the inside of the other end, and a thread on the outside, and a tapered part to be inserted and fixed into the end of the hose at one end. an insert body having a fitting part at one end thereof and having a fitting part at the other end that removably fits into the fitting part of the connecting body; and an insert body provided between the fitting parts of the connecting body and the insert body. and a union nut that is screwed onto the thread of the connection body and fixes the insert to the connection body, the hose connection device being mounted on the outer periphery of the end of the hose and connecting the end to the insertion. A hose connection device characterized by comprising a hose clamp that presses against a tapered portion of a body.