JPH0425593Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention is a method for introducing and directing fluid to a fluid actuator such as a double-acting cylinder by installing any number of double pipes in any direction from a common flow path. This invention relates to a branch joint for a double pipe that can branch into two pipes.

(Prior art) According to Utility Model Application No. 62-113480, as shown in FIG. 2 of the double pipe a to be extended and connected to the connector b
In addition, an inner cylinder e ₁ and an outer cylinder _{e 2} are formed at one end in the axial direction of the joint body _c . a female socket part e having an inner and outer double cylinder shape, and an inner cylinder _e1 of the female socket part e at the other end in the axial direction of the joint body c.
and outer cylinder e ₂ , and inner cylinder f ₁ and outer cylinder f ₂ each having a shape that can be fitted to them.
A male socket part f having an inner and outer double cylinder shape is formed, and the inner cylinders e ₁ and f ₁ of each of the socket parts e and f connect to the opening end of the first fluid passage d ₁ and e,
A branch joint for a double pipe has been proposed in which the outer cylinders e ₂ and f ₂ of f constitute the open end of the second fluid passage d ₂ .

If a plurality of these branch joints are connected in the axial direction by fitting the male socket part of the other branch joint into the female socket part of one adjacent branch joint, the first fluid passages and the first fluid passages of each branch joint can be connected. The two fluid passages communicate with each other, and this also applies when the branch joints are connected in different phases so that the connectors b face different directions, and thus the number of branch joints used and the connection phase By appropriately setting , it is possible to branch any number of double pipes in any direction.

(Means for Solving the Problem) By the way, in the above-mentioned prior application, when the female and male socket parts e and f are fitted together, the step surface on the outer periphery of the outer cylinder _f2 of the male socket part f and the inner The end faces of the outer cylinder e1 of the female socket part e abut against the stepped surfaces of the outer periphery of the cylinder _e2 , but the end faces of the inner cylinder _{f1 and} the outer cylinder _f2 of the male socket part f are in contact with the female socket part. Since they are not butted against the cylinders _f1 and f2, fluid pressure acts on the O-ring g on the outer periphery through the fitting clearance from the end faces of these cylinders f1 and _f2 , and if the fluid supply pressure is increased, leaks are likely to occur. Furthermore, since the cross-sectional area of the passage is narrowed at the male socket portion f, there is a problem of increased pressure loss.

An object of the present invention is to provide a branch joint that eliminates such problems.

(Means for Solving the Problems) In order to achieve the above object, the present invention has a joint body provided with a connector on the peripheral surface to which a double pipe can be freely connected, and which extends in the axial direction of the joint body. , forming an inner and outer double first and second fluid passages communicating with one and the other of the two pipe lines of the double pipe connected to the connector, and forming an inner pipe and an outer pipe at one end in the axial direction of the joint body. a female socket part having a double inner and outer cylinder shape consisting of a cylinder, and an inner cylinder and an outer cylinder having shapes that can be fitted to the inner cylinder and outer cylinder of the female socket part, respectively, at the other end in the axial direction of the joint body. and an inner and outer double pipe-shaped male socket part, the inner cylinder of each socket part forming an opening end of the first fluid passage, and the outer cylinder of each socket part forming an opening end of the second fluid passage. and a stepped surface having a shape matching the end surfaces of the inner and outer cylinders of the female socket on the inner peripheries of the inner and outer cylinders of the female socket, and a stepped surface between the inner and outer cylinders of the male socket. A step surface having a shape matching the end faces of the inner cylinder and outer cylinder of the female socket is formed on the outer periphery, and when the male socket part of another joint body is fitted into the female socket part of the joint body, these steps are removed. The present invention is characterized in that the end face of each cylinder of each socket portion abuts against the surface.

(Function) A plurality of branch joints A of the present invention are connected in the axial direction by fitting the male socket part 7 of the other branch joint A into the female socket part 6 of one adjacent branch joint A. Connect the double pipe 3 to the connector 2.

In this case, the inner cylinder 6a and the outer cylinder 6 of the female socket part 6
The end faces of b are the inner cylinder 7a and outer cylinder 7b of the male socket part 7.
At the same time, the end surfaces of the inner cylinder 7a and outer cylinder 7b of the male socket part 7 collide with the stepped surfaces 6 of the inner peripheries of the inner cylinder 6a and outer cylinder 6b of the female socket part.
c, 6d, and the inner cylinder 6a of both socket parts 7,
The fitting clearance between 7a and the outer cylinders 6b and 7b is sealed at both ends in the axial direction by abutting the end surfaces of each cylinder against these step surfaces, and a special seal can be created by simply inserting an O-ring in the fitting clearance. High-pressure fluid can be supplied without leakage without providing any means.

Further, the inner peripheral surface of the inner cylinder 7a of the male socket part 7 and the peripheral wall surface of the first fluid passage 101 which is continuous with the step surface 6c of the inner cylinder 6a of the female socket part ₆ form a continuous surface.
The first fluid passages ₁₀₁ of each branch joint a are straight and continuous in the axial direction, and the inner cylinder 6a of the female socket part 6
The outer peripheral surface of the male socket part 7 and the step surface 7 of the inner cylinder 7a of the male socket part 7
the inner peripheral wall surface of _the second fluid passage 10 ₂ that is continuous to The outer peripheral wall surface becomes a continuous surface,
The second fluid passages 10 ₂ of each branch joint A are also straightly continuous in the axial direction, thereby preventing pressure loss from occurring due to changes in the passage shape.

(Example) Referring to FIGS. 1 to 4, 1 indicates a joint body made of a resin molded product, and 2 indicates a connector to which a double pipe 3 protruding from the circumferential surface of the joint body 1 can be freely connected. , the connector 2 has a stepped-shaped concave hole formed at its tip end consisting of a large-diameter hole 2a and a small-diameter hole 2b at the bottom, and the outer cylinder 3a of the double pipe 3 is inserted into the large-diameter hole 2a. A chuck member 2c for gripping and a chuck member 2d for gripping the inner pipe 3b of the double pipe 3 are installed inside the small diameter hole 2b, and when the double pipe 3 is connected to the connector 2, the small diameter A conduit in the inner tube 3b is connected to a first port 4 provided at the bottom of the hole 2b, and a conduit in the outer tube 3a is connected to a plurality of second ports 5 provided on the circumferential surface of the bottom of the large diameter hole 2a. I made it possible to communicate.

In addition, the connector 2 for the double pipe is the Utility Model 61-
No. 28989, Utility Model No. 122493, Utility Model No. 61-97689
Various types are known, such as the number, and it is needless to say that they are not limited to those of the above embodiments.

Further, a female socket portion 6 in the shape of an inner and outer double tube with aligned end surfaces consisting of an inner cylinder 6a and an outer cylinder 6b is protruded from one end in the axial direction (the right end in FIG. 1) of the joint body 1, and At the other end in the axial direction of the joint body 1, there is provided an inner and outer double cylinder shape with aligned end surfaces, consisting of an inner cylinder 7a and an outer cylinder 7b each having a shape that can be fitted into the inner cylinder 6a and the outer cylinder 6b of the female socket part. A male socket part 7 is provided protrudingly, and as shown in FIG. 7 so that they can be connected sequentially in the axial direction, and since the female and male socket portions 6 and 7 have a double inner and outer cylinder shape, the connectors 2 of each branch joint A are different from each other. Even if the phase of each branch joint A is changed so as to face in the direction, the inner cylinders 6a, 7a and the outer cylinders 6b, 7b of both the socket parts 6, 7 are reliably fitted.

Further, stepped surfaces 6c and 6d of a shape matching the end surfaces of the inner cylinder 7a and outer cylinder 7b of the male socket part 7 are formed on the inner periphery of the roots of the inner cylinder 6a and the outer cylinder 6b of the female socket part 6, and Step surfaces 7c and 7d are formed on the outer periphery of the roots of the inner cylinder 7a and the outer cylinder 7b to fit the two socket parts 6 and 7, respectively. When the male socket part 7
The end surfaces of the inner cylinder 7a and outer cylinder 7b of
a and the end surfaces of the outer cylinder 6b are in contact with the stepped surfaces 7c and 7d of the male socket part 7, and the inner cylinders 6a and 7a of both socket parts 6 and 7 and the outer cylinders 6b and 7b are
The fitting clearance between the tubes is sealed at both ends in the axial direction by abutting these step surfaces with the end surfaces of each cylinder, and good sealing performance can be obtained simply by interposing the O-ring 8 in this fitting clearance.

In addition, in order to prevent the branch joint A from being damaged during storage, the O-ring 8 is inserted into a ring groove 6e formed on the inner peripheral surface of the inner cylinder 6a and outer cylinder 6b of the female socket part 6. In this case, the ring groove 6e is
The cylinders 6a and 6b are formed to reach the end faces thereof to facilitate their molding, and a ring member 9 is press-fitted from the end face side of each of the cylinders 6a and 6b to prevent the O-ring 8 from slipping out.

In the illustrated example, the inner tubes 6a, 7a and the outer tubes 6b, 7b of each socket portion 6, 7 are cylindrical, but they are made into a regular polygonal cylindrical shape and the branch joint A
It may also be possible to change the phase of the phase by a certain angle.

Further, the joint body 1 is formed with double inner and outer first and second fluid passages 10 ₁ , 10 ₂ extending in the axial direction of the joint body 1 , and the inner cylinders 6 a , 7 a of the respective socket portions 6 , 7 are connected to each other.
The opening end of the first fluid passage ₁₀₁ and the outer cylinder 6b,
7b constitutes the open end of the second fluid passage 10 ₂ , and the first port 4 and the second fluid passage 10 ₂ are connected to the first port 4 via a first branch passage 11 ₁ that branches off from the first fluid passage 10 ₁ . is communicated with the second port 5 via a plurality of second branch passages ₁₁₂ branched from this, and the pipe line in the inner pipe 3b and the pipe line in the outer pipe 3a of the double pipe 3 connected to the connector 2 are connected. The pipelines are a first fluid passage 10 ₁ and a second fluid passage 10 ₂ , respectively.
It is now possible to communicate with

Here, when the plurality of branch joints A are fitted in the female and male socket parts 6 and 7 as described above, the first
The peripheral wall surface of the fluid passage ₁₀₁ and the inner peripheral part of the inner cylinder 7a of the male socket part 7 form a continuous surface, and each branch joint A
The first fluid passages 10 ₁ are continuous in a straight line in the axial direction, and the stepped surface 7c of the inner cylinder 7a of the male socket portion 7
The inner circumferential wall surface of the second fluid passage 10 ₂ that is continuous to the outer circumference of the inner cylinder 6a of the female socket part 6, and the outer circumference of the second fluid passage 10 ₂ that is continuous to the step surface 6d of the outer cylinder 6b of the female socket part 6. Wall surface and outer cylinder 7 of male socket part 7
The inner circumferential surfaces of b are respectively continuous surfaces, and the second fluid passages 10 ₂ of each branch joint A are also straightly continuous in the axial direction.

Next, an example of use of the proposed branch joint A in piping of a fluid circuit in which multiple fluid actuators are operated synchronously by one common switching valve 12 will be explained with reference to FIGS. 5 and 6. .

For this piping, in addition to the proposed branch joint A, a single pipe joint B and a blind cover C are used. The single pipe joint B has two single pipe connection ports 14 ₁ , 14 ₂ on one end surface of a joint body 13 having a mounting base 13 a, and fluid passages 15 ₁ in each of the connection ports 14 ₁ , 14 ₂ on the other end surface. , 15 ₂ , and a socket portion 17 having the same shape as the male socket portion 7 of the branch joint A, which is composed of an inner cylinder 16a and an outer cylinder 16b that communicate with each other via 2, and a mounting base 18a. A socket part 19 having the same shape as the female socket part 6 of the branch joint A consisting of an inner cylinder 19a and an outer cylinder 19b is protruded from the cover plate 18.

For piping, configure a joint unit by connecting the required number of branch joints A corresponding to the number of fluid actuators in the required phase as described above,
Connect the single pipe joint B to the female socket part 6 of the branch joint A at one end (the right end in the drawing) of the unit.
At the same time, the socket part 19 of the blind cover C is fitted into the male socket part 7 of the branch joint A at the other end of the unit, and the unit is attached to the mounting base 13a of the single pipe joint B and the blind cover C. , 18a are fixed to the mounting plate 20.

Then, a double pipe 3 connected to each fluid actuator is connected to the connector 2 of each branch joint A, and a pair of supply/discharge ports of the switching valve 12 are connected to the two single pipe connection ports 14 ₁ and 14 ₂ of the single pipe joint B. Two single pipes 21 ₁ and 21 ₂ connected to the ports 12a and 12b are respectively connected.

Accordingly, the first fluid passage 8 and the second fluid passage 9, which communicate over the entire length of the joint unit, are connected to each supply of the switching valve 12 via the single pipe joint B and each of the single pipes 21 ₁ and 21 ₂ . The valve 12 is connected to the exhaust ports 12a and 12b, and the inner tube 3b of the plurality of double pipes 3 is connected to one supply/discharge port 12a of the valve 12, and the outer pipe 3a of these double pipes 3 is connected to the other supply/discharge port 12b. are connected in common.

In addition, a chuck member is provided at each single pipe connection port 14 ₁ , 14 ₂ of the single pipe joint B, and the single pipe 21 1 , 21 ₂ can be connected with one touch.
21 ₂ can be attached and detached, and when piping between the coupling unit and the switching valve is done using a double pipe, the connector of the branch coupling A can be used instead of the single pipe coupling B. Use a double pipe fitting with a connector similar to 2.

(Effect of the invention) As described above, according to the invention, the fitting clearance between the inner cylinder and the outer cylinder corresponding to the female and male sockets is sealed by abutting the end face of each cylinder against each stepped surface at both ends in the axial direction. As a result, fluid leakage from the fitting clearance is suppressed, and it can be applied to high-pressure fluids, increasing versatility. Also, the first fluid passages and the second fluid passages of each branch joint are straight and continuous in the axial direction. This has the effect of preventing pressure loss from occurring due to changes in the shape of the passage.

[Brief explanation of the drawing]

Figure 1 is a longitudinal sectional view of an example of the proposed branch joint, Figure 2
Figures to Figures 4 are respectively from - line to - in Figure 1.
5 is a partially cutaway plan view showing an example of the use of the proposed branch joint, FIG. 6 is a side view thereof, and FIG. 7 is a longitudinal sectional view of the branch joint of the prior application. 1... Joint body, 2... Connector, 3... Double pipe, 6... Female socket part, 7... Male socket part,
6a, 7a...Inner cylinder, 6b, 7b...Outer cylinder, 6
c, 6d, 7c, 7d...Step surface, ₁₀₁ ...First fluid passage, ₁₀₂ ...Second fluid passage.

Claims (1)

[Scope of utility model registration request] A joint body provided with a connector on the circumferential surface to which a double pipe can be freely connected, extending in the axial direction of the joint body,
An inner and outer dual first and second fluid passages communicating with one and the other of the two pipes of the double pipe connected to the connector are formed, and an inner cylinder and an outer cylinder are provided at one end in the axial direction of the joint body. an inner and outer double-cylindrical female socket portion comprising an inner and outer double cylinder-shaped female socket portion, and an inner cylinder and an outer cylinder at the other end in the axial direction of the joint body, each having a shape that can be fitted to the inner cylinder and outer cylinder of the female socket portion. and an inner and outer double pipe shaped male socket part, and the inner cylinder of each socket part is connected to the first socket part.
The opening end of the fluid passage and the outer cylinder of each socket constitute the opening end of the second fluid passage, wherein the inner cylinder of the male socket and the inner periphery of the inner cylinder and the outer cylinder of the female socket are formed. A joint is formed by forming a step surface having a shape that matches the end surface of the outer cylinder, and a step surface having a shape that matches the end surfaces of the inner cylinder and the outer cylinder of the female socket on the outer periphery of the inner cylinder and the outer cylinder of the male socket. A branch joint for a double pipe, characterized in that when a male socket part of another joint main body is fitted into a female socket part of the main body, the end surfaces of each cylinder of each socket part abut against these stepped surfaces. .