JP2004060793A - Sealing member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sealing member which is contrived not to drop out when joining two flow passage tubes by interposing the sealing member . <P>SOLUTION: The member is the sealing member which interposes between end faces facing the two flow passage tubes 1, 2 toward each other and serves configuration fastening by a cap nut 5 which is a fastener. The sealing member 7 is of an elastic material and is formed in circular doughnut shape. The sealing member is configured to provide at least two or more protuberances 8 press-fitting inside the cap nut 5 around their outer peripheries. The sealing member 7 is hooked to the cap nut 5 by the protuberances 8 when fastening the cap nut 5 by engaging the female thread 4 with the male thread 3 of other flow passage tube 2 and thus facilitates piping operation without dropping it out in operation. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a sealing member that sandwiches two joints between two flow pipes and seals the joint when joining two pipes.
[0002]
[Prior art]
Conventionally, as shown in a cross-sectional side view of a conventional seal member of FIG. 5 and a flow path tube portion to which the conventional seal member is attached, two flow paths 1 and 2 are joined to form a continuous fluid flow path. The facing end faces of the flow pipes 1 and 2 are smoothed, a male thread 3 of a pipe parallel thread is provided on the outer circumference of one flow pipe 2, and the female pipe of a parallel thread is provided on the inner circumference of the other flow pipe 1. A cap nut 5 provided with a screw 4 is fitted, and a flange-shaped portion 6 for rotatably locking the cap nut 5 around the flow pipe 1 is provided on the end face of the flow pipe 1. For a pipe of a cap nut 5 locked with one of the flow pipes 1 with an impervious elastic body, for example, a donut-shaped sealing member 7 made of a rubber material sandwiched between opposed end faces of the pipes 1 and 2. The female thread 4 of the parallel thread is fastened to the male thread 3 of the parallel pipe thread provided on the outer periphery of the other flow path pipe 2. The two flow pipes 1 and 2 are drawn by the axial force generated by the fastening, and the donut-shaped sealing member 7 sandwiched between the end faces of the two flow pipes 1 and 2 is compressed, and the two flow pipes 1 and 2 are compressed. Generally, a structure for sealing the joint portion 2 is often used.
[0003]
In particular, this structure does not require the use of an adhesive or a liquid sealing material that exhibits sealing performance by curing, and thus does not require the application of such a material. The sealing performance is exhibited only by fastening the cap nut 5. Therefore, even in a narrow space where it is difficult to apply an adhesive or a liquid sealing material to the entire periphery of the joint between the flow pipes 1 and 2, if a fastening tool such as a wrench is barely inserted, the flow pipe 1 and the flow pipe 1 are not connected. 2 can be joined. Further, even in a narrow space where the worker cannot visually confirm the application of the adhesive or the liquid sealing material, the joining operation of the flow pipes 1 and 2 can be performed by hand.
[0004]
[Problems to be solved by the invention]
However, a donut-shaped sealing member 7 made of an impermeable material is sandwiched between the opposed end faces of the two flow pipes 1 and 2, and the cap nut 5 locked to one of the flow pipes 1 in that state. When the female thread 4 of the parallel pipe thread is fastened to the male thread 3 of the parallel pipe thread provided on the outer periphery of the other flow pipe 2, the two flow pipes 1 and 2 face each other until the screw is temporarily fastened. When the gap between the end faces is larger than the thickness of the seal member 7, there is a problem that the seal member 7 is easily dropped. In particular, in the case of work in a narrow space, if the seal member 7 falls off, the seal member 7 cannot be picked up and the seal member 7 is easily lost. If the two pipes 1 and 2 are fastened without notice, there is a problem that water leaks. Therefore, there is a problem that the sealing member 7 must be very carefully taken off until the sealing member 7 is sandwiched between the end faces of the two flow pipes 1 and 2 that are opposed to each other and temporarily fastened.
[0005]
The present invention has been made to solve the above-described problem, and has as its object to provide a seal member capable of easily fastening two flow pipes.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a seal member having a circular donut shape and having at least two or more projections on its outer periphery.
[0007]
In addition, the sealing member has a circular donut shape and is provided with at least two projections that come into contact with the inner surface of the flow channel tube.
[0008]
ADVANTAGE OF THE INVENTION According to this invention, a seal | sticker member does not fall off until it is sandwiched between flow-path pipes and temporarily fastened, and piping work becomes easy.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
The invention according to claim 1 of the present invention is a circular donut-shaped seal member that is sandwiched between opposed end faces of two flow pipes and seals a joint between the two flow pipes, A bag in which at least two or more projections are provided on the outer periphery of the seal member, wherein the seal member is sandwiched between opposite end faces of two flow pipes, and is engaged with one of the flow pipes in that state. When the female thread of the parallel pipe thread of the nut is fastened to the male thread of the parallel pipe thread provided on the outer circumference of the other flow pipe, the projection is pressed against the inside of the cap nut and the seal member is locked. Until the screws are temporarily fastened, even if the gap between the opposed end faces of the two flow pipes is larger than the thickness of the seal member, the seal member does not fall off.
[0010]
The invention according to claim 2 of the present invention is the seal member according to claim 1, wherein the maximum outer diameter of the seal member by the projection is larger than the inner diameter of the female screw of the cap nut, and The pressure contact state is good, the seal member is securely locked, and even if the gap between the facing end faces of the two flow pipes is larger than the thickness of the seal member until the screw is temporarily fastened, the seal member falls off Has the effect of not having
[0011]
According to a third aspect of the present invention, in the sealing member of the first or second aspect, the thickness of the projection is greater than the thread pitch of the female screw of the cap nut, and the protrusion is adjacent to the female screw of the cap nut. The projection comes into contact with the two vertices, and the sealing member has an effect of being able to lock without tilting to the female screw of the cap nut.
[0012]
The invention according to claim 4 of the present invention is a circular donut-shaped sealing member that is sandwiched between opposed end faces of two flow path pipes and seals a joint between the two flow path pipes, A seal member provided on the inner edge of the seal member with at least two projections that come into contact with the inner surface of the flow channel tube, wherein the seal member is sandwiched between opposed end surfaces of the two flow channel tubes, When the female thread of the parallel pipe thread of the cap nut locked to the flow pipe is fastened to the male thread of the parallel pipe thread provided on the outer circumference of the other flow pipe, the projection is pressed against the inside of the flow pipe. As a result, the seal member is locked, so that the seal member does not fall off until the screw is temporarily fastened.
[0013]
According to a fifth aspect of the present invention, in the seal member according to the fourth aspect, the maximum outer diameter of the projection is larger than the inner diameter of the flow path pipe, and the projection is strong inside the flow path pipe. It has the effect that the contact of the seal member is made more reliable by pressing.
[0014]
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0015]
(Embodiment 1)
FIG. 1 is a perspective view of a seal member according to Embodiment 1 of the present invention, and FIG. 2 is a cross-sectional side view showing a state where the seal member is locked to a flow channel tube. In these figures, the same components as in the prior art in FIG. 5 are denoted by the same reference numerals as in FIG.
[0016]
As shown in FIGS. 1 and 2, the seal member 7 is formed in a circular donut shape from an impermeable elastic material, for example, a rubber material. The thickness t of the sealing member 7 is determined by a threaded fastening member (generally, a pipe parallel thread specified in JIS B0202 is used) provided at the end of the flow path tubes 1 and 2 to be sealed. It is larger than the thread pitch P of the cap nut 5 and P <t. A protrusion 8 is provided on the outer periphery of the seal member 7 with a width of the thickness t of the seal member 7. It is provided so that φD1> φd1 that is larger than the internal diameter φd1 of the female screw of the cap nut 5 as a fastening member. The plurality of protrusions 8 are arranged so as to divide the outer periphery of the seal member 7 into equal parts.
[0017]
Next, a configuration for locking the seal member 7 to the flow pipes 1 and 2 will be described with reference to FIG.
[0018]
As shown in FIG. 2, a cap nut 5 is arranged between opposite ends of the two flow pipes 1 and 2. The flow pipe 1 has a flange-shaped portion 6 for rotatably locking a cap nut 5 on an end face, and the cap nut 5 has a female screw 4 of a pipe parallel screw. The cap nut 5 is fitted into one of the flow pipes 1, and the male thread 3 of the parallel pipe thread provided on the outer circumference of the other flow pipe 2 is screwed with the female thread 4 of the parallel pipe thread of the cap nut 5. I have to.
[0019]
When the sealing member 7 is inserted into the female thread 3 of the pipe parallel thread of the cap nut 5, the projection 8 of the sealing member 7 is provided with the same width t as the thickness t of the sealing member 7. Is larger than the thread pitch P of the internal thread 4 of the female screw 4, so that the protrusions 8 contact two adjacent vertices of the thread of the internal thread 4 of the parallel thread for the pipe of the cap nut 5, and the sealing member 7 The female screw 4 of the screw locks.
[0020]
In this state, the male thread 3 of the parallel pipe thread of the other flow path pipe 2 is screwed into the female thread 4 of the parallel pipe thread of the cap nut 5, and the cap nut 5 is turned to connect the two flow pipes 1 and 2 with each other. The end face is brought into close contact with the seal member 7.
[0021]
The seal member according to the first embodiment is sandwiched between the facing end faces of the two flow pipes 1 and 2, and in this state, the female thread of the pipe parallel thread of the cap nut 5 locked to one of the flow pipes 1. When the screw 4 is fastened to the male screw 3 of the parallel pipe thread provided on the outer periphery of the other flow path pipe 2, the projection 8 comes into pressure contact with the inside of the cap nut 5 and is locked. Until the fastening, the seal member 7 does not fall off even if the gap between the opposed end faces of the two flow pipes 1 and 2 is larger than the thickness of the seal member 7. Therefore, the joining work including the sealing of the flow pipes 1 and 2 is facilitated.
[0022]
(Embodiment 2)
FIG. 3 is a perspective view of a seal member according to Embodiment 2 of the present invention, and FIG. 4 is a cross-sectional side view showing a state where the seal member is locked to a flow channel tube. In these figures, the same components as those in the prior art in FIG. 5 are denoted by the same reference numerals as in FIG.
[0023]
As shown in FIGS. 3 and 4, the seal member 7 is formed in a circular donut shape from an impermeable elastic body, for example, a rubber material. The seal member 7 is located between the opposed end faces of the two flow pipes 1 and 2, and a protrusion 9 on the inner edge thereof that contacts the inner surface of one flow pipe 1 divides the seal member 7 equally in the circumferential direction. It is arranged in multiple positions. The maximum outer diameter φD2 of the contact surface of the projection 9 with the flow pipe 1 is larger than the inner diameter φd2 of the flow pipe 1 so that φD2> φd2.
[0024]
Next, a configuration for locking the seal member 7 to the flow pipes 1 and 2 will be described with reference to FIG.
[0025]
As shown in FIG. 4, a cap nut 5 is disposed between opposite ends of the two flow pipes 1 and 2. The flow pipe 1 has a flange-shaped portion 6 for rotatably locking a cap nut 5 on an end face, and the cap nut 5 has a female screw 4 of a pipe parallel screw. The cap nut 5 is fitted into one of the flow pipes 1, and the male thread 3 of the parallel pipe thread provided on the outer periphery of the other flow pipe 2 is screwed with the female thread 4 of the parallel pipe thread of the cap nut 5. I have to.
[0026]
When the seal member 7 is positioned at the end face of one of the flow pipes 2, the projection 9 of the seal member 7 is inserted into the flow pipe 2. Since the maximum outer diameter φD2 of the projection 9 is such that φD2> φd2 with respect to the internal diameter φd2 of the male thread 3 of the pipe parallel thread, the projection 9 generates a holding force by the elastic force of the sealing member 7, and the sealing member 7 is engaged with the end face of the external thread 3 of the parallel pipe thread.
[0027]
In this state, the female screw 4 of the cap nut 5 fitted to the other flow pipe 1 is screwed into the male screw 3 of the pipe parallel thread of the flow pipe 2, and the cap nut 5 is turned to turn the two flow paths. The end faces of the tubes 1 and 2 are brought into close contact with the sealing member 7.
[0028]
The number of the protrusions 9 may be two or more, and may be provided continuously. Further, the seal member 7 can be locked to the female screw 4 first.
[0029]
When the two flow pipes 1 and 2 are joined, the seal member 7 according to the second embodiment is press-fitted by inserting the projection 9 inside one of the flow pipes 2, that is, the seal member 7 is As a result, the sealing member 7 does not fall off until the screw is temporarily fastened. Therefore, the joining work including the sealing of the flow pipes 1 and 2 is facilitated.
[0030]
【The invention's effect】
As is clear from the above description, the present invention is elastic and has a circular donut shape, and has at least two or more projections on its outer periphery, or has an inner edge in contact with the inner surface of the flow path tube. Since the seal member is provided with at least two or more projections, the seal member is sandwiched between the opposed end faces of the two flow pipes, and in this state, the parallel nut for the pipe of the cap nut locked to one of the flow pipes. When the female screw is fastened to the external thread of the parallel pipe thread provided on the outer circumference of the other flow pipe, the projection is pressed against the inside of the cap nut or the inside of the flow pipe so that the seal member is locked. In other words, even if the gap between the opposed end faces of the two flow pipes is larger than the thickness of the seal member until the screws are temporarily fastened, the seal member does not fall off.
[0031]
In particular, even in the case of work in a narrow space, the seal member does not fall off and is not lost, so even if the two flow pipes are fastened without noticing that the seal member has fallen off or lost, water leaks. Nothing. Therefore, it is not necessary to pay attention to the detachment of the seal member, and the piping work becomes easy until the seal member is sandwiched between the two end faces of the two flow pipes and temporarily fastened.
[Brief description of the drawings]
FIG. 1 is a perspective view of a seal member according to a first embodiment of the present invention; FIG. 2 is a cross-sectional side view showing a state where the seal member is locked to a flow path tube; FIG. FIG. 4 is a cross-sectional side view of a state in which the seal member is locked to a flow channel tube. FIG. 5 is a cross-sectional side view of a conventional seal member and a flow channel tube portion to which the seal member is attached.
DESCRIPTION OF SYMBOLS 1 Flow pipe 2 Flow pipe 3 Male screw 4 Female screw 5 Cap nut 6 Flange-shaped part 7 Seal member 8 Projection 9 Projection

Claims (5)

A circular donut-shaped seal member sandwiched between opposed end faces of two flow channel pipes and sealing a joint portion of the two flow path pipes, and made of an elastic material; A seal member provided with at least two projections on the outer periphery that are in contact with the inside of a cap nut as a fastening member. 2. The seal member according to claim 1, wherein a maximum outer diameter of the seal member by the projection is larger than an inner diameter of the female screw of the cap nut. 3. The seal member according to claim 1, wherein the protrusion has a dimension in a thickness direction larger than a thread pitch of a female screw of the cap nut. A circular donut-shaped seal member sandwiched between opposed end faces of two flow channel pipes and sealing a joint portion of the two flow path pipes, and made of an elastic material; A seal member, wherein at least two or more protrusions are provided on an inner edge of the flow path tube so as to contact the inner surface of the flow path tube. The seal member according to claim 4, wherein a maximum outer diameter of the projection is larger than an inner diameter of the flow pipe.

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