JPH0728474Y2 - Hose fittings - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hose joint such as a so-called suction hose in which a soft hose or a reinforced spiral wire is wound and buried.

[0002]

2. Description of the Related Art Heretofore, as a hose joint of this kind, as a hose joint, a nipple portion into which a hose is fitted, and a threaded pipe having an external thread engraved on an outer peripheral surface for connecting the nipple portion to a hose connecting device. Alternatively, it is common that a cap nut-shaped connection portion having an internal thread engraved on the inner peripheral surface is integrally formed integrally with a metal material. Therefore, the conventional hose coupling has the following problems. ． The weight of the hose joint becomes heavy. Especially in a hose joint for a relatively thick suction hose used for sending compressed air to a large equipment, the weight thereof is heavy and the handling thereof is inconvenient. ． To prevent the hose from breaking at the fitting base of the nipple, hook one end on a hose tightening member such as a hose nut that is provided on the outside of the nipple, and fix the hose to the specified length outside the root. In addition to having to manufacture a spiral-shaped one that is wound around and attached to it or a pipe-shaped anti-break member that has appropriate flexibility by separate processing,
When the hose is attached to the hose joint, a troublesome and troublesome work is required, such as fitting the anti-break member to the outside of the hose and mounting it. ． The hose fitting must be connected to the hose connection device by means of a connection and then the hose must be connected to the nipple.
In other words, if the hose is connected to the nipple and then connected to the hose connection device, when the connection part formed in the shape of a screw tube or cap nut is turned and screwed into the hose connection port of the hose connection device. Not only does the hose become twisted by its rotating operation, but in the case of a suction hose, the connection cannot be turned and the connection becomes impossible. Therefore, conventionally, it is a troublesome connection work that the hose must first be connected to the hose connecting device and then the hose must be connected to the nipple portion. ． The hose connection port of the hose connecting device includes a female port having a female screw and a male port having a male screw. Therefore, conventionally, not only the female mouth hose joint and the male mouth hose joint in which the nipple portion is integrally formed continuously with the connection portion corresponding to these female mouth and male mouth must be manufactured, but Must be stored and managed individually.

[0003]

The present invention has been made in view of such conventional inconveniences and drawbacks, and the technical problem to be solved is to reduce the weight of the joint body and to further reduce the nipple portion. Just by fitting the hose to the nipple, it is possible to prevent breakage at the fitting base of the nipple part, and it is also possible to connect to the hose connection device without any problem with the hose fitted and attached to the nipple part. An object is to provide a hose joint that can be manufactured at low cost.

[0004]

To achieve the above object, the technical means taken by the present invention is to form a nipple portion of a joint body into which a hose is fitted with a synthetic resin material,
A connecting portion for connecting the nipple portion to a hose connecting device is formed of a metal material, and a reinforcing rib that radially divides the internal flow passage of the nipple portion is integrally provided, and one end of the reinforcing rib is directed from the hose fitting port toward the axial extension direction. A hose break prevention part with appropriate flexibility is integrally provided, and the connecting part is integrally connected to the other end device connection port of the nipple part so as to be coaxially communicated with the internal flow path. It is composed of a connecting pipe protruding in the extension direction and a connecting pipe that is rotatably fitted and engaged to the outside of the connecting pipe and screwed into the hose connection port of the hose connecting device. A ball rolling groove having a substantially semicircular cross section is provided in the circumferential direction and an O-ring is provided, while a connecting pipe is provided with a ball insertion port that is in communication with the ball rolling groove in a state of being fitted into a connecting pipe. It is characterized by having done.

[0005]

According to the above-mentioned technical means of the present invention, the total weight of the joint body is reduced by forming the nipple portion with the synthetic resin, and the nipple portion is integrated with the device connection port. After inserting the connection pipe into the outer side of the connection pipe of the connection part that has been mechanically connected and fitting it, insert the ball into the ball rolling groove on the outside of the connection pipe from the ball insertion port provided in the connection pipe, and then the ball The rolling groove and the ball insertion port are internally provided so as to engage and connect them. As a result, the connecting pipe of the connecting portion is rotatably attached to and held by the connecting pipe integrally connected to the device connecting port of the nipple portion by the movement of the balls rolling along the ball rolling groove. The close contact of the ring with the inner peripheral surface of the connecting pipe ensures the sealing property. Then, the hose is inserted into the nipple and fitted to the hose, and the connection pipe of the connection part is screwed into the hose connection port to connect the joint body to the hose connection device. At this time, since the connecting pipe is rotatably fitted and engaged with the connecting pipe integrally connected to the device connecting port of the nipple, the hose does not twist and the hose fitting port is not twisted. A hose break prevention portion, which is integrally provided in the axial extension direction, is inserted in the hose fitting base portion of the hose so as to prevent the base portion from breaking.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The joint body A is a nipple portion 1 formed of a synthetic resin material, and a metal material for connecting the nipple portion 1 to a hose connecting device B. And a connecting portion 2 formed by using a hose C from one end of the nipple portion 1a side of the hose fitting opening 1a side to the nipple portion 1 for fitting, and at the other end device connection opening 1b side thereof. The fitting main body A is connected to the hose connection port 3 and the hose C is connected to the hose connection device B by being screwed and attached to the hose connection port 3 of the hose connection device B.

The nipple portion 1 is integrally molded into a tubular shape having an appropriate length with a bamboo shoot-shaped engaging portion provided on the outer side of the hose fitting port 1a side, and a reinforcing rib 4 for radially partitioning the internal flow passage 1c is formed. A hose break prevention portion 5 which is integrally provided and has appropriate flexibility in the axial extension direction from the hose fitting opening 1a is integrally provided, and the connecting portion 2 is provided outside the edge of the device connection opening 1b. A connecting convex portion 7 having recesses 6 at appropriate intervals on the peripheral surface integrally connected to one end opening of the connecting pipe 2a described later.
To provide.

The reinforcing ribs 4 are for strengthening the strength of the resin nipple portion 1 to prevent flow loss (pressure loss) of the internal flow passage 1c, and as shown in the drawing, the device connection port 1b side of the nipple portion 1c. Except the above, the cross section of the flow path 1d such as a cross shape or a substantially Y shape is provided in an appropriate radial shape over the entire length of the internal flow path 1c from the middle of the internal flow path 1d to the hose fitting port 1a side. (See Figure 2). As a result, the resin nipple 1
The shape is made thinner to further reduce its weight.

The hose break prevention portion 5 is for holding the fitting base portion 8 of the nipple portion 1 of the hose C more easily than the hose fitting opening 1a of the nipple portion 1, and holds the hose fitting opening.
In order to provide appropriate flexibility (elasticity) from the rim of 1a, it is gradually thinned toward the tip, and a large number of taper shapes are cut and separated at appropriate intervals in the circumferential direction.

The connection part 2 is a device connection port 1b of the nipple part 1.
A metal connecting pipe 2a that is integrally connected to the internal flow path 1c so as to communicate with the internal flow path 1c so as to project in the axial extension direction, and rotatably fitted and fixed to the outside of the connecting pipe 2a. The hose connecting device B is composed of metal connecting pipes 2b and 2c screwed to the hose connecting port (female or male port) 3, and a ball rolling groove 9 having a substantially semicircular cross section is formed outside the connecting pipe 2a. The O-ring 10 is provided in the circumferential direction and the connecting pipes 2b and 2c are provided with a ball insertion port 11 which is connected to the ball rolling groove 9 in a state of being fitted to the connecting pipe 2a.

The connecting pipe 2a has a collar having a proper thickness and a length, which is provided with a communication passage 12 on the inner axis thereof, which has the same diameter as the inner passage 1c of the nipple 1 and is coaxially communicated therewith. It is formed in a tubular shape, and a flange is provided on the outer periphery of the nipple, and the connecting convex portion 7 of the device connection port 1b of the nipple portion 1 is fitted and attached to the inner surface of the opening edge at one end of the flange to integrally form the device connection port 1b. Connection recess to connect to
13 is provided and the ball rolling groove 9 and the O ring are provided on the outer side thereof.
Provide 10. By the way, the fitting and fastening of the connecting convex portion 7 of the nipple portion 1 device connection port 1b into the connecting concave portion 13 at the one end opening portion of the connecting pipe 2a is performed by connecting the connecting pipe 2a set in a mold during insert molding of the nipple portion 1a. The resin material is poured into the connection concave portion 13 so that the connection pipe 2a is integrally connected to the device connection port 1b of the nipple portion 1. The ball rolling groove 9 is preferably made of metal, synthetic resin, or the like, and is preferably a connecting pipe 2a or connecting pipes 2b, 2c.
A metal spherical ball 14 made of the same metal as that of FIG.
Is a groove for connection that rotatably connects and holds the ball 14
One half side of the connecting pipe 2a is provided in the vicinity of the flange projecting on the one end opening side on the outer side of the connecting pipe 2a with a groove depth that can be engaged in engagement, and has a semicircular cross section over the entire circumference. Then, the O-ring 10 is attached by being engaged with the ring mounting groove 15 provided on the outer side of the opening on the other end side.

On the other hand, as shown in FIG. 1, the connecting pipes 2b and 2c have an inner diameter which is substantially the same as the outer diameter of the connecting pipe 2a and have an appropriate length. For the male port of the hose connection port 3 of the hose connection device B formed by engraving and forming a collar portion projecting on the outer side of the rear end side of the other end pipe,
As shown in FIG. 4, this is for a female mouth formed in a straight circular tube shape in which a female screw 17 is engraved on the inner side of the opening on one end side, and the connecting pipe 2a is fitted into the connecting pipe 2a. A ball insertion port 11 communicating with the ball rolling groove 9 from the outside located on the ball rolling groove 9 is provided, and the ball rolling groove 9 is formed on the inner surface where the ball insertion port 18 opens.
Ball rolling groove with a semicircular cross section
19 is provided in the circumferential direction. The ball insertion port 11 has a connecting pipe 2a and connecting pipes 2b and 2c formed by matching the two ball rolling grooves 9 and 19 with each other.
A large number of balls 14 are inserted in the space formed in the circumferential direction between the inner and outer sides, that is, the balls for inserting the balls 14 for rotatably connecting the connecting pipes 2b and 2c to the connecting pipe 2a, With a diameter that is the same as or slightly larger than the sphere diameter of 14, pierce from the projecting end surface of the flange toward the inner surface of the connection 2b,
A female screw is applied to the inner peripheral surface of the cap lid 20 so that the cap lid 20 is screwed on and the ball 14 is inserted and then closed (see FIG. 3).

Reference numeral 21 in the drawing indicates O which is installed outside the nipple portion 1.
There is a ring, and after the hose C is inserted into the nipple portion 1 and fitted, the inner surface of the hose C is brought into close contact with the inner surface of the hose C which is moved by the rotation of the tightening nut 22 mounted on the outside of the hose C to prevent fluid leakage. This is for the purpose of achieving a sealing effect, and the tightening ring 23 is installed in the mounting groove 24 provided at the outer position of the nipple portion 1 located at the movement limit.

Thus, according to the hose joint of this embodiment constructed as described above, the equipment connection port 1b of the resin nipple portion 1
The nipple side, which is integrally connected to the metal connecting pipe 2a constituting the connecting portion 2, and the connecting pipe 2b for male mouth and the connecting pipe 2c for female mouth, which share the nipple side, are individually manufactured. Store and manage it at least. When the hose connection port 3 of the hose connection device B for connecting the hose C is a male port as shown in FIG. 1, the connection port 2b for the male port is inserted and fitted in the connecting tube 2a, and the ball insertion port is also fitted. The ball 14 is inserted from 11 and the female connection pipe 2b is rotatably fixedly connected to the connection pipe 2a to assemble the joint body A. After that, the hose C is inserted into the nipple portion 1 of the joint body A for fitting, and the tightening nut 22 rotatably mounted on the outside is rotated to move the inner tightening sleeve 23 in the hose C tightening direction. Firmly attach the hose C to the nipple 1. At this time, the O-ring 12 is brought into close contact with the inner surface of the hose C to achieve a sealing effect. In particular, when a suction hose is used, the O-ring 21 can be closely attached along the inner surface of the unevenness due to the inner surface of the unevenness due to the reinforcing spiral wire rod that spirally protrudes on the inner surface of the hose, and an effective and reliable sealing effect can be achieved. It is what is done. Further, since the connecting pipes 2b and 2c are rotatably provided, the hose C is not twisted when the hose joint is connected to the hose connecting port 3, and the hose connecting device B is connected to the hose C. In the use state in which the hose C is connected, even if the fitting base portion 8 of the nipple portion 1 of the hose C is bent, the hose break prevention portion 5 keeps the fluid in the hose C without being broken and without resistance.

FIG. 5 shows another embodiment of the hose joint of the present invention. The basic structure of this embodiment is substantially the same as that of the embodiment described above, and the connecting portion is not changed at all in the configuration of the nipple portion 1. Connecting pipe 2a and connecting pipes 2b and 2c by inserting the second ball 14
Only the connection configuration form with is changed. Therefore, the ball insertion port 11 communicating with the ball rolling groove 9 is provided on the inner surface of the connecting pipes 2b and 2c without providing the ball rolling groove 19 corresponding to the ball rolling groove 9 provided on the outer side of the connecting pipe 2a. Connecting pipe 2b,
Provided at several points in the circumferential direction of 2c, connecting pipes from each ball insertion port 18
By inserting the ball 14 into the ball rolling groove 9 on the outer side of 2a, the connecting pipes 2b and 2c are connected to the connecting pipe 2a.

[0016]

Since the hose joint of the present invention is constructed as described above, it has the following operational effects. ． The connection pipe of the connection part is integrally connected to the equipment connection port of the resin nipple part, the connection pipe is inserted into the outside of the connection pipe and fitted, and the connection pipe outside the connection pipe from the ball insertion port provided in the connection pipe. By inserting the ball into the ball rolling groove and allowing the ball to be present in the ball rolling groove and the ball insertion port so as to engage and connect the two, the female port and the male port of the hose connection port of the hose connection device A structure in which a connection pipe corresponding to a mouth is rotatably engaged and connected, that is, a metal connection pipe of a connection portion is integrally connected and provided with a nipple side in common, and a female port and a male port of a hose connection port of a hose connection device are shared. Since the structure can be connected to the mouth, it is not necessary to individually process and manufacture the hose joints for the female mouth and the male mouth as in the conventional case. Therefore, the hose joint can be provided at low cost. Moreover, since the connecting pipe of the connecting portion that is connected to the hose connection port by rotating operation is rotatably provided, the hose will not be twisted when the hose joint is connected to the hose connecting device. . Since the nipple portion for connecting the hose is made of synthetic resin material, its weight can be reduced as compared with the conventional hose joint which is entirely made of metal. Moreover, since the reinforcing ribs are provided in the inner flow path of the nipple to radially divide the nipple, rigidity is imparted, so that it does not collapse even if a trouble such as stepping on occurs during use. ,
The wall thickness of the nipple part can be further reduced to further reduce the weight of the hose joint. Furthermore, since the hose break prevention part is integrally provided from the hose fitting port of the nipple part inserted into the hose in the axial extension direction, separate processing is required when connecting the hose to the hose joint as in the past. The workability is greatly improved because no troublesome and troublesome mounting work such as fitting the anti-breaking part manufactured by fitting it on the outside of the hose is required. Furthermore, since the hose break prevention part is provided integrally with the nipple part, it is no longer necessary to manufacture the bend prevention part that was separately processed as an accessory, making it an economically effective process. We were able to provide a hose fitting.

[Brief description of drawings]

FIG. 1 is a sectional front view of a hose joint of the present invention when the hose connection port of the hose connection device is a female port.

2 is a cross-sectional side view taken along the line II-II of FIG.

3 is a cross-sectional side view taken along the line III-III in FIG. It is the front view which showed the use condition.

FIG. 4 is a sectional front view of the hose joint of the present invention when the hose connection port of the hose connection device is a male port.

5 is a cross-sectional side view taken along the line II-II of FIG. 1 showing another embodiment.

[Explanation of symbols]

A ... Joint body 1 ... Nibble part 1a ... Hose fitting port 1b ... Equipment connection port 1d ... Internal flow path 2 ... Connection part 2a ... Connection pipes 2b, 2c ... Connection pipe 3 ... Hose connection port 4 ... Reinforcing rib 5 ... Hose break Stop prevention part 9 ... Ball rolling groove 10 ... O-ring B ... Hose connection device 11 ... Ball insertion port

Claims (1)

[Scope of utility model registration request] 1. A nipple portion to which a hose of a joint body is fitted is formed of a synthetic resin material, and a connecting portion for connecting the nipple portion to a hose connecting device is formed of a metal material,
Reinforcing ribs that radially divide the internal flow path of the nipple portion are integrally provided, and at the same time, a hose break prevention portion having appropriate flexibility is provided integrally from the hose fitting opening toward the axial extension direction, The connection part is integrally connected to the other end device connection port of the nipple part, is positioned coaxially with the internal flow path, and is connected to the connection path so as to project in the axial extension direction. It is composed of a connecting pipe that is fitted and engaged and screwed into a hose connecting port of a hose connecting device, and a ball rolling groove having a substantially semicircular cross section is provided in the circumferential direction on the outside of the connecting pipe and an O ring is provided. On the other hand, a hose joint characterized in that the connection pipe is provided with a ball insertion port that is in communication with the ball rolling groove in a state of being fitted in the connection pipe.