JPH0736230Y2 - Pipe fitting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is attached to one end of a first channel body and one end of a second channel body, and both channel bodies can be attached and detached with one touch. Pipe fittings.

[Prior Art] Examples of pipe fittings according to the prior art include, for example, Shoukai 62-153.
As disclosed in Japanese Patent No. 495, a valve body support cylinder having a front end opened and a rear end closed is fixed to the axial center of the plug main cylinder, and a fluid passage of the plug main cylinder is provided. The valve body for opening and closing the valve opening is attached to the valve body support cylinder such that it can be moved back and forth with a sealing member and a compression spring interposed, and a small hole is formed between the inside of the valve body support cylinder and the outside of the plug main cylinder body. There is known a pipe joint which is a valve body for a valve plug which is communicated with the valve plug.

Further, there is known a pipe joint as disclosed in JP-A-61-55494. This has the structure shown in FIGS. 14 and 15, and FIG. 14 shows the first flow path body (not shown).
First tubular body or nose 1 attached to one end of the
FIG. A cylindrical cap 3 having a bottom is fixed to the tip opening 2 of the nose 1 through a tip flange 4. A poppet valve 5 is movably incorporated in the cap 3 in the axial direction, and a pair of seal members 6 and 7 are provided in the circumferential groove of the poppet valve 5, respectively. Reference numeral 8 indicates a biasing means composed of a coil spring. In FIG. 14, the poppet valve 5 is moved to the nose 1 by the urging force of the urging means 8.
1 shows a state in which the flow path 9 of the nose 1 is closed by moving to the tip end opening 2 side. That is, the seal members 6 and 7 are
The cap 3 is pressed against the inner surface of the cap 3 in a state of being formed on the cap 3 and located on both sides of the communication hole 10 to exert a sealing function. Since both seal members 6 and 7 are located on both sides of the communication hole 10 in this way, the axial force on the poppet valve 5 due to the fluid pressure remaining in the nose 1 in use is one seal member 6 one. In the portion of the right side in the figure, the portion of the other sealing member 7 is in the left side of the figure, and they cancel each other out. Therefore, in order to push the poppet valve 5 in the closed state inward of the nose 1 to open it, a force larger than the biasing force of the biasing means 8 may be applied.

FIG. 15 is a sectional view showing a state in which the nose 1 is inserted and connected to the body 11. The body 11 is a second tubular body, and is attached to one end of a second flow path body (not shown). The poppet valve 12 of the body 11 has a mushroom shape in cross section, and one sealing member 13 is provided on the bulkhead. 15
Indicates a valve holder. When not connected, the poppet valve 13 is moved leftward in the figure by the urging force of the coil spring 14, and the seal member 13 is pressed against the inner surface of the body 11 to close the flow path 16. In the figure, the tip surfaces of both poppet valves 5 and 12 come into contact with each other and are pushed inward, and the respective seal members 6 and 13 are separated from the inner surfaces of the tip opening portions of the cap 3 and the body 11, respectively, and both flow paths are shown. 9 and 16 are connected.

[Problems to be solved by the invention]

However, the conventional pipe joint has the following problems. That is, the former pipe joint (Shokai 62-153495
In Japanese Patent Laid-Open Publication No. 2004-242, since there are many sealing points, there is a large risk of leakage in terms of the sealing effect, and there is a risk that the sealing member will fall off, deform, or be damaged due to the mounting structure of the sealing member. Furthermore, the seal structure is complicated, there is concern about strength and durability, and it is disadvantageous in terms of processing.

Also, in the latter pipe joint (Japanese Patent Laid-Open No. 61-55494), as shown in FIG. 14, when not connected, the axial force to the poppet valve 5 due to the fluid pressure remaining in the nose 1 is offset. The pair of seal members 6 and 7 are formed so as to be located on both sides of the communication hole 10 so as to be possible. Therefore, in order to insert and connect the nose 1 to the body 11 to connect the flow paths 9 and 16, the seal member 6 on the tip side passes through the communication hole 10 and reaches the left side of the communication hole 10 as shown in FIG. I have to move. Therefore, the seal member 6 repeatedly moves inside the communication hole 10 while repeatedly contacting when the pipe joint is connected or disconnected,
It was easily damaged and could leak.

Further, as a result of forming the communication hole 10 in the cap 3, there is a problem that the strength of the cap 3 is reduced and the processing is troublesome.

Further, the movement amount B'becomes large, which inevitably leads to the result that the length of the protruding portion 17 of the poppet valve 5 is increased.
There is also a problem in that the nose 1 and the body 11 are difficult to connect because the protrusion 17 is deformed or damaged.

A first object of the present invention is to provide a pipe joint which has an excellent sealing effect and is less likely to cause the seal member to fall off, deform, or be damaged.

The second purpose of the present invention is that the sealing structure is simple,
It is to provide a pipe joint excellent in workability.

A third object of the present invention is to provide a pipe joint in which the poppet valve of the pipe joint has a small movement amount and the poppet valve is not likely to be deformed or damaged.

[Means for solving problems]

The present invention provides a first tubular body attached to one end of a first channel body and the first tubular body attached to one end of a second channel body.
A second tubular body into which the tubular body is inserted and connected, and a second means that is built into each of the two bodies and closes the tip openings of the two bodies by a biasing means when the two bodies are not in contact with each other. In a pipe joint provided with a pair of poppet valves that are pushed inward against each other against the biasing force of the means to communicate the flow paths of both main bodies, the poppet valve includes two members on the proximal side and the distal side. A cap having a bottomed cylindrical shape that accommodates the base end side of the poppet valve in at least one of the cylindrical bodies, and the cap inner surface and the outside air when not connected along the central axis of the poppet valve. And a pair of seal members are provided in the poppet valve so as to be separated from each other in the axial direction, and the seal members on the tip side of the pair of seal members are the base end side of the poppet valve. Two on the tip side And the outer diameters of both seal members are formed to be substantially the same, and the seal member on the distal end side is pressed against the distal end opening portion of the cylindrical main body when the two cylindrical main bodies are not connected to each other. The seal member is pressed against the inner surface of the cap, the flow path space in the tubular main body and the outer surface between the both seal members of the poppet valve face each other, and the seal member on the tip side is located outside the cap when connected. That is what I did.

[Action]

The poppet valve of the present invention has a bottomed tubular cap that accommodates the proximal end side of the poppet valve in at least one tubular body that is screwed into two members, the proximal end side and the distal end side, and the poppet valve. Since there is an air communication hole along the central axis that communicates with the inner surface of the cap and the outside air when not connected, it is not necessary to punch a hole for releasing the pressure inside the cap in the cap or the tubular body, and with a large force when connecting. There is no need to operate the tubular bodies.

Further, a pair of seal members are provided on the poppet valve so as to be separated from each other in the axial direction, and the seal members on the tip ends of the pair of seal members are sandwiched between two members on the base end side and the tip end side of the poppet valve. Since the outer diameters of both seal members are formed to be almost the same, the axial force due to the remaining fluid pressure is canceled as is apparent from Pascal's principle, and the poppet valve does not receive an excessive force, so The biasing means presses the tip side seal member of the poppet valve against the tip end opening portion of the tubular body to effectively prevent fluid leakage. The tip-side seal member is sandwiched between two members, the seal member does not drop off or deform during use, and the shape of the seal member can be selected relatively freely.

Furthermore, when the two tubular bodies are not connected, the sealing member on the tip side is pressed against the tip opening of the tubular body, and the sealing member on the proximal side is pressed against the inner surface of the cap, and the flow passage space in the tubular body is formed. Since the outer surface of the poppet valve and the outer surface of the poppet valve face each other, the movement amount of the poppet valve at the time of connection may be small as long as the tip seal member is separated from the inner surface of the tubular body. The part can be made short,
Minimize the deformation and damage of the poppet valve tip protrusion to ensure a reliable connection.

Further, since the seal member on the tip side is located outside the cap at the time of connection, there is no press fit of the seal member on the tip side to the cap, and the sealing effect at the time of connection is excellent, and the seal member is removed, deformed, damaged, etc. There is little fear of

The pipe joint of the present invention has a simple structure and is excellent in strength and workability.

〔Example〕

Hereinafter, the present invention will be described based on the embodiments of the drawings. FIG. 1 shows a cross-sectional view of the nose 1 which is the first tubular body. The cap 3 is arranged inside the nose 1, and the poppet valve 5
The base end side of is stored so as to be movable in the axial direction. That is, one seal member 6 is exposed to the outside of the cap 3, and the other seal member 7 is pressed against the inner surface of the cap 3. The outer diameters of both seal members 6 and 7 are formed to be substantially the same. 18 is O
A backup ring for preventing the seal member 7 from protruding from the ring. In this embodiment, the poppet valve 5 is formed by screwing two members on the base end side and the tip end side. The tip-side seal member 6 is clamped and fixed by this screwing. Along the central axis of the poppet valve 5, the air communication hole 20
Is provided, the inside of the cap communicates with the outside air when not connected, and the tip side seal member is located outside the cap when connected. Since the other structure is the same as that of FIG. 14, the same portions are denoted by the same reference numerals and the description thereof will be omitted.

FIG. 2 shows a sectional view of the body 11, which is the second tubular body.
The cap 3, the poppet valve 5, and the seal members 6 and 7 are the same as those shown in FIG.

FIG. 3 is a sectional view showing a state in which the nose 1 shown in FIG. 1 and the body 11 shown in FIG. 2 are connected. The respective poppet valves 5 are pushed inward so that the flow paths 9 and 16 are in communication with each other. In order to achieve this communication state, it suffices that the seal member 6 on the tip end side of both poppet valves 5 be separated from the inner surface of the tip end opening of each tubular body, so the amount of movement of the valve 5 may be small. Naturally, the cap 3 does not require a communication hole as in the conventional example. The nose 1 and the air communication holes 20 of each poppet valve 5 of the body 11 are connected to each other.

FIG. 4 shows a sectional view of a pipe joint in which the nose 1 has a conventional structure and only the body 11 has the poppet valve 5 according to the present invention built therein. On the contrary, FIG. 5 shows a pipe joint in which the nose 1 incorporates the poppet valve 5 according to the present invention and the body 11 has a conventional structure. The effects of the present invention can be obtained even with pipe joints having these structures. Of course, as shown in FIG. 3, it is most preferable that both the nose 1 and the body 11 have the poppet valve 5 according to the present invention built therein.

6 is a front view of the cap 3, and FIG. 7 is VII-VI of FIG.
A sectional view taken along line I is shown. Locking blades 19 for fixing the cap 3 to the inner surface of the nose 1 or the body 11 are provided around the periphery. FIG. 8 shows a front view of the cap 3 having different locking blades 19.

FIG. 9 shows a sectional view of the poppet valve 5, and FIGS. 10 and 11 show sectional views of the disassembled members of the poppet valve 5. FIG. 12 is a sectional view showing another embodiment of the poppet valve, and FIG. 13 is a sectional view showing a state before the seal member 6 is fixed.

[Effect of device]

According to the present invention, a poppet valve has a bottomed tubular cap in which at least one tubular main body has two members, a proximal end side and a distal end side, screwed together to accommodate the proximal end side of the poppet valve. Since there is an air communication hole along the center axis of the poppet valve that communicates with the inner surface of the cap and the outside air when not connected, it is not necessary to perforate a hole for releasing the pressure in the cap or the cylindrical body, and at the time of connection. The operating force of is small and sufficient.

Further, according to the present invention, a pair of sealing members are provided on the poppet valve so as to be spaced apart from each other in the axial direction, and the sealing members on the front end side of the pair of sealing members are provided on the base end side and the front end side of the poppet valve. Since it was sandwiched between the members, and the outer diameters of both seal members were formed to be substantially the same, the axial force due to the remaining fluid pressure was canceled as apparent from the principle of Pascal, and no extra force was applied to the poppet valve, The biasing means of the poppet valve presses the tip side seal member of the poppet valve against the tip end opening of the tubular body to effectively prevent fluid leakage. The tip-side seal member is sandwiched between two members, the seal member does not drop off or deform during use, and the shape of the seal member can be selected relatively freely.

Furthermore, when the two tubular bodies are not connected, the seal member on the tip side is pressed against the tip opening of the tubular body, and the seal member on the base side is pressed against the inner surface of the cap, so that the flow path space inside the tubular body is formed. Since the outer surface between both seal members of the poppet valve faces each other, the movement amount of the poppet valve at the time of connection may be small as long as the tip seal member is separated from the inner surface of the tubular body. Can be made short, and deformation and damage of the poppet valve tip protrusion are reduced to ensure reliable connection.

Further, since the seal member on the tip side is located outside the cap at the time of connection, there is no press fit of the seal member on the tip side to the cap, and the sealing effect at the time of connection is excellent, and the seal member is removed, deformed, damaged, etc. There is little fear of

The pipe joint of the present invention has a simple structure and is excellent in strength and workability.

[Brief description of drawings]

FIG. 1 is a sectional view of a nose which is a first tubular body according to the present invention, FIG. 2 is a sectional view of a body which is a second tubular body according to the present invention, and FIG. 3 is a connection between the nose and the body. A sectional view of the state, FIGS. 4 and 5 are sectional views of a pipe joint in which only one of them has a poppet valve according to the present invention built therein, and FIG.
FIG. 7 is a front view of the cap, FIG. 7 is a sectional view taken along the line VII-VII of FIG. 6, and FIG. 8 is a front view showing another embodiment of the cap.
The figure shows a cross-sectional view of the poppet valve, and Figures 10 and 11 show the cross section.
FIG. 12 is a cross-sectional view of each member disassembled from the valve in FIG. 12, FIG. 12 is a cross-sectional view showing another embodiment of the poppet valve, FIG. 13 is a cross-sectional view before fixing the seal member of FIG. 12, and FIG. FIG. 15 is a cross-sectional view of the nose, and FIG. 15 is a cross-sectional view of the conventional example in which the nose and the body are inserted and connected. 1 ... Nose (first cylindrical body), 2 ... Tip opening, 3 ...
... Cap, 5 ... Poppet valve, 6, 7 ... Sealing member, 8 ... Energizing means, 9, 16 ... Flow path, 11 ... Body (second cylindrical main body), 17 ... Tip protruding portion , 20 …… Air communication hole.

Claims (1)

[Scope of utility model registration request] 1. A first device attached to one end of a first flow passage body.
A tubular main body, a second tubular main body attached to one end of the second flow path body to insert and connect the first tubular main body, and a biasing means when the two main bodies are not in contact with each other. And a pair of poppet valves that are pushed inward against each other against the biasing force of the biasing means to connect the flow passages of both bodies when the two bodies are inserted and connected. In the pipe joint, the poppet valve has a bottomed tubular cap in which two members, a proximal end side and a distal end side, are screwed together, and the proximal end side of the poppet valve is housed in at least one of the tubular main bodies. An air communication hole that communicates with the inner surface of the cap and the outside air when not connected along the central axis of the poppet valve, and a pair of seal members are provided on the poppet valve so as to be spaced apart in the axial direction, and the pair of seal members are provided. Of the tip side of the seal member The seal member is sandwiched between two members, that is, the proximal end side and the distal end side of the poppet valve, and the outer diameters of both sealing members are formed to be substantially the same, and the sealing member on the distal end side when the both tubular main bodies are not connected. Is pressed against the opening of the distal end of the tubular body, and the seal member on the proximal side is pressed against the inner surface of the cap,
A pipe joint characterized in that a flow path space in the tubular main body and an outer surface between both seal members of a poppet valve face each other, and a seal member on a tip end side is located outside the cap at the time of connection.