JP4781164B2 - Connection method of joint body - Google Patents

Description

  The present invention relates to a sealing step of sealing a gap between an inner surface of a receiving port in which an elastic sealing member is provided on an inner surface along a circumferential direction and an outer surface of an insertion port with a sealing member, and a seal It is related with the connection method of the coupling body comprised at least from the insertion process which inserts an insertion port until it reaches a sealing process toward the inside of a receiving opening from the opening opening side of a member.

  In the conventional connecting method of the joint body, the inner surface is formed in a tapered shape whose diameter is reduced toward the inside of the receiving port, and the fitting portion is inserted into the seal member fitted in the recess formed on the inner surface of the receiving port. The insertion port is inserted inward of the receiving port while contacting the outer surface of the port, and the gap between the receiving port and the insertion port is sealed in a water-tight manner by a seal member (for example, see Patent Document 1). .

Japanese Examined Patent Publication No. 36-16588 (2nd page, Fig. 3)

  However, in Patent Document 1, since the insertion port is brought into contact with the tapered sealing member, the insertion direction of the insertion port is not stable. There was a risk of leakage from the recess on the inner surface of the mouth. If the insertion direction of the insertion port is not stable, the insertion port may come into contact with a fitting portion having a relatively large rubber hardness, and the seal member may be pushed inward from the receiving port to be removed. Furthermore, when the receiving port constitutes the end of the deformed tube, the deformed tube is relatively light, so it is pressed in the insertion direction when the insertion port is inserted, and moves together with the insertion port and cannot be joined smoothly. It was.

  Further, in Patent Document 1, when the insertion port is inserted, the outer surface of the insertion port comes into contact with the fitting portion of the seal member or the intermediate portion inside the receiving port from the fitting portion, so that the rubber hardness is relatively high. Since the fitting part or middle part with a large diameter is to be compressed, it is difficult to join easily due to the movement of the receiving port. The sealing of the gap may not be maintained, and the outer surface of the insertion port needs to be tapered in order to facilitate joining.

  The present invention has been made paying attention to such a problem, and when the insertion port is inserted into the inner surface of the receiving port regardless of the shape of the member constituting the receiving port or the outer surface of the insertion port, the tip of the insertion port It is an object of the present invention to provide a joint body connection method capable of connecting joint bodies without requiring special means for guiding and supporting the parts.

In order to solve the above-mentioned problem, the joint body connecting method according to claim 1 of the present invention is characterized in that an elastic seal member is provided on the inner surface along the circumferential direction, A sealing step of watertightly sealing the gap with the outer surface with the sealing member, and an insertion for inserting the insertion port from the opening side of the sealing member toward the inside of the receiving port until the sealing step is reached A joint body connecting method comprising at least a process comprising:
The seal member is fitted in a recess formed in the inner surface of the receiving port along the circumferential direction, and is located inward of the receiving port with respect to the tube axis direction than the fitting unit. And a valve portion for watertightly sealing the gap in the sealing step, and an intermediate portion having a predetermined length in the tube axis direction interposed between the fitting portion and the valve portion. The inner peripheral surface of the portion and the intermediate portion is formed substantially parallel to the tube axis, and has a support portion that can contact the outer peripheral surface of the insertion opening, and during or after the insertion step, The correction step of correcting the insertion direction of the insertion port with respect to the tube axis direction of the receiving port by guiding and supporting at least the distal end portion of the insertion port using the support portion is further configured. It is said.
According to this feature, since the seal member has a support portion for guiding and supporting the distal end portion of the insertion opening, regardless of the shape of the member constituting the receiving opening or the insertion opening outer surface, The joint body can be connected without requiring any special means for guiding and supporting the insertion slot. And since the fitting part and the middle part of the seal member have the support part, the middle of the insertion process or after the completion of the insertion process regardless of the position of the distal end of the insertion port on the inner surface of the insertion port Is possible. That is, since the inner peripheral surfaces of the fitting part and the intermediate part have a predetermined length with respect to the tube axis and are formed substantially parallel to each other, the insertion port is in contact with and guided by these inner peripheral surfaces. Is not in contact with the valve portion of the seal member, and the valve portion and the fitting portion are separated by a predetermined length, so that even if the valve portion is compressed in the sealing process, the seal member is removed from the recess of the receiving port. It will not come off and leak. Furthermore, as a result, it becomes easy to correct the insertion direction of the insertion opening with respect to the tube axis direction, and the molding process of the seal member is easy.

The joint body connecting method according to claim 2 of the present invention is the joint body connecting method according to claim 1 , wherein the seal member is made of a rubber body, and the fitting portion and the intermediate portion rubber. It is characterized in that the hardness is formed to be larger than at least the rubber hardness of the valve portion.
According to this feature, the rubber hardness of the fitting part and the intermediate part is formed larger than that of the valve part, and the fitting part and the intermediate part can stably support the distal end of the insertion opening in the correction process. In the sealing process, the outer surface of the insertion opening can smoothly compress the valve portion having a smaller rubber hardness.

A joint body connection method according to a third aspect of the present invention is the joint body connection method according to any one of the first to second aspects, wherein the receiving member is located closer to the opening side of the receiving port than the seal member. A positioning step in which an inner surface of the mouth has a guide portion, and the insertion direction of the insertion port is positioned by guiding at least a tip portion of the insertion port using the guide portion before the insertion step. Is further configured.
According to this feature, since the inner surface of the receiving port has a guide portion that guides at least the tip of the insertion port, the insertion direction of the insertion port can be smoothly positioned in the positioning step before the insertion step. It is possible to smoothly shift to the insertion process.

According to a fourth aspect of the present invention, there is provided a joint body connecting method according to any one of the first to third aspects, wherein a fixing member is formed near the outer end of the receiving port. In addition, after the sealing step, the fixing member further includes a fixing step for fixedly connecting the receiving port and the insertion port.
According to this feature, even when an external force or an internal pressure is applied to the receiving port or the insertion port in order to connect the receiving port and the insertion port fixedly by the fixing member in the fixing step after the sealing process. The sealability of the joint body can be stably maintained.

The joint body connection method according to claim 5 of the present invention is the joint body connection method according to claim 4 , wherein the fixing member is screwed into a bolt hole formed in an outer peripheral surface of the receiving port. It is characterized by comprising push bolts to be inserted.
According to this feature, since the fixing member is constituted by a push bolt that is screwed into a bolt hole formed on the outer peripheral surface of the receiving port, the push bolt is not screwed in the insertion process or the sealing process. The insertion port can be inserted into the inner surface of the receiving port so that the push bolt does not get in the way.

A connection method for a joint body according to claim 6 of the present invention is the connection method for a joint body according to claim 5 , characterized in that a fixing pawl is provided at the tip of the push bolt. .
According to this feature, since the fixing pawl is provided at the tip of the push bolt, the receiving port is inserted even when an external force is applied so that the connected receiving port and the insertion port are separated from each other in the tube axis direction. And the sealing property between the mouth and the mouth are further maintained.

A connection method for a joint body according to a seventh aspect of the present invention is the connection method for a joint body according to any one of the first to sixth aspects, wherein the receiving port is at least partially along the tube axis. It is characterized in that it is formed on both end sides of a curved pipe having a curved portion.
According to this feature, the receiving port is formed on both ends of the curved pipe, and the joint body can be formed at any end of the curved pipe, so that the pipe member can be provided with a degree of freedom. .

  Examples of the present invention will be described below.

  An embodiment of the present invention will be described with reference to the drawings. First, FIG. 1 is a schematic view showing an arrangement state of pipe members connected by a joint body connecting method in an embodiment of the present invention. FIG. 2 is a partial cross-sectional view showing a receiving port and an insertion port in which a seal member is fitted. 3A is a partial cross-sectional view showing the state of the insertion process, and FIG. 3B is a partial cross-sectional view showing the state of the sealing process and the fixing process. FIG. 4 is a plan view showing the situation of the correction process. Fig.5 (a) is a top view which shows the curved pipe in which the receiving port was formed in both ends, (b) is AA sectional drawing of (a). FIG. 6 is an enlarged cross-sectional view showing the status of the positioning process. FIG. 7 is an enlarged cross-sectional view illustrating a state of an insertion process in a modification of the seal member. FIG. 8 is an enlarged cross-sectional view showing the fixing member.

  First, as shown in FIG. 1 of the present embodiment, the joint body of the present invention is, for example, along a straight pipe 11 or a T-shaped pipe or a pipe axis constituting a pipe member 1 disposed in the ground. Used as a member for connecting the elbow pipe 2 or the like which is a curved pipe of the present invention having a curved portion at the portion, and a fluid such as water and sewage or gas flows down a path formed inside the pipe, or an electric wire or the like Is wired.

  In particular, existing buried objects 3 such as existing pipes or existing cables are often buried in the ground, and in order to avoid the buried objects 3 and to arrange the pipe member 1, By connecting the straight pipe 11 or the bend pipe 13 and connecting the pipes, a desired piping path can be configured. As described above, there are a wide variety of members constituting the piping path, and it is necessary to seal the joints connecting the respective members without leaking the fluid flowing down inside the piping.

  As shown in FIG. 3 (b), the joint body of the present invention includes the receiving port 5 of the elbow pipe 2 and the insertion port 12 of the straight pipe 11 that is the insertion port of the present invention inserted into the inner surface of the receiving port 5. And a sealing member 8 that has elasticity and seals a gap between the inner surface of the receiving port 5 and the outer surface of the insertion port 12 inserted into the receiving port 5.

  In addition, as shown in FIG. 6, the joint body connecting method of the present invention enters the insertion port 12 inward of the receiving port 5 while abutting the tapered portion 5 c formed on the opening side of the receiving port 5. FIG. 3 (a) shows a positioning step, an insertion step of inserting the insertion slot 12 while contacting the seal member 8 provided on the inner surface of the receiving slot 5 along the circumferential direction, 4, after the end of the insertion process, a correction process for correcting the insertion direction of the insertion opening 12 with respect to the tube axis direction of the reception opening 5, and the insertion opening 12 received as shown in FIG. A sealing step of further inserting the inner side of the inner surface of the port 5 to seal the gap between the inner surface of the receiving port 5 and the outer surface of the insertion port 12 with a seal member 8; A fixing step of fixedly connecting the receiving port 5 and the insertion port 12 with a bolt 9.

  As shown in FIG. 2, the elbow tube 2 into which the seal member 8 of the present invention is fitted has a receiving port 5 at the end, and the receiving port 5 has an inner diameter at the tube portion 6 of the elbow tube 2. A recess 5 a provided along the circumferential direction is formed on the inner peripheral surface of the receiving port 5. Further, the inner peripheral surface of the receiving port 5 on the opening side of the receiving port 5 with respect to the recess 5a is formed in a tapered portion 5c which is a guide portion of the present invention described later and is reduced in diameter toward the inner side of the receiving port 5.

  As will be described later, the seal member 8 of the present invention includes a fitting portion 8a fitted into a recess 5a formed along the circumferential direction on the inner surface of the receiving port 5, and a tube of the elbow pipe 2 rather than the fitting portion 8a. Located inward of the receiving port 5 in the direction of the axis C, the gap between the inner surface of the receiving port 5 and the outer surface of the insertion port 12 of the straight tube 11 that is an insertion port inserted into the receiving port 5 is sealed in a watertight manner. And a middle portion 8b interposed between the fitting portion 8a and the valve portion 8c. The outer diameter is a ring body having substantially the same diameter as the inner diameter of the receiving port 5, and is elastic. It consists of a rubber body.

  Further, the fitting portion 8a and the intermediate portion 8b constitute a support portion of the present invention described later, and are formed substantially parallel to the tube axis C. Furthermore, the rubber hardness of the fitting part 8a and the intermediate part 8b is formed larger than the rubber hardness of the valve part 8c (see FIGS. 2, 3 and 6).

  The sealing member 8 has a fitting portion 8 a fitted in a recess 5 a formed on the inner surface of the receiving port 5 in the circumferential direction. The inner diameter of the fitting portion 8a is formed larger than the inner diameter of the valve portion 8c. Further, the valve portion 8c is located inwardly in the tube axis C direction of the elbow pipe 2 in the fitted state, and the insertion port 12 of the straight pipe 11 is provided as shown in FIG. In a state where the valve portion 8c is not compressed yet inserted, the cross-sectional shape is formed in a substantially circular shape, and the inner peripheral surface faces the tube axis C as compared with the fitting portion 8a and the intermediate portion 8b. Bulge out.

  An intermediate portion 8b of the seal member 8 fitted in the recess 5a on the inner surface of the receiving port 5 is formed substantially parallel to the tube axis C direction. The intermediate portion 8b is formed thinner in the direction perpendicular to the tube axis C than the valve portion 8c, and a gap K is formed between the intermediate portion 8b and the inner surface of the receiving port. The intermediate portion 8b has a predetermined length in the tube axis C direction.

  Further, bolt holes 5b are formed at a predetermined pitch in the circumferential direction on the outer peripheral surface in the vicinity of the outer end of the receiving port 5, and are pushed by being screwed in the direction perpendicular to the tube axis C from the outside of the elbow pipe 2. Bolts 9 are formed. Further, a fixing claw 10 is provided at the tip of the push bolt 9. The fixed pawl 10 is housed in a recess formed in a part of a tapered portion 5c provided on the inner surface of the receiving port 5 along the circumferential direction. As shown in FIG. 2, when the insertion slot 12 is not yet inserted, the fixed pawl 10 is received in the direction orthogonal to the pipe axis C so as not to interfere with the insertion of the insertion slot 12 of the straight pipe 11 described later. It is provided so as to be retracted outward from the inner peripheral surface of the mouth 5. Note that the push-in bolt is not necessarily screwed in a direction perpendicular to the tube axis, and may be screwed in a parallel or oblique direction with respect to the tube axis as shown in a modification example to be described later.

  The outer diameter of the insertion opening 12 of this embodiment is substantially the same as the inner diameter of the fitting portion 8a and the intermediate portion 8b of the seal member 8 fitted to the inner peripheral surface of the receiving opening 5, The outer peripheral surface of the tip 12a is formed as a tapered surface that decreases in diameter toward the tip. Further, the inner diameter of the insertion opening 12 is substantially the same as the inner diameter of the pipe portion 6 of the elbow pipe 2.

  Next, the positioning process which comprises the connection method of the coupling body of this invention is demonstrated.

  As shown in FIG. 6, in the positioning step, the insertion port 12 is brought into contact with the tapered portion 5c formed on the inner peripheral surface on the opening side of the receiving port 5 (see the insertion port 12 indicated by a dotted line in the figure). The insertion direction of 12 is set in a direction parallel to the tube axis C (see the black arrow in the figure), and the insertion opening 12 is moved inward of the receiving port 5 (see the white arrow in the figure). Here, in the present invention, the positioning step means that the insertion opening 12 is in contact with or close to the tapered portion 5c of the receiving opening 5 and toward the opening 5 opening side of the seal member 8 toward the inside of the receiving opening 5. The process to enter is shown.

  The inner peripheral surface on the opening side of the receiving port 5 is reduced in diameter toward the inner side of the receiving port 5, and has a tapered portion 5 c that guides the insertion port 12. Before, in the positioning step, the insertion direction of the insertion opening 12 can be smoothly positioned in the direction of the tube axis C, and the transition to the insertion step can be made smoothly.

  Next, the insertion process and the correction process that constitute the joint body connecting method of the present invention will be described.

  As shown in FIG. 3A, in the insertion step, the straight tube 11 includes a fitting portion 8 a and an intermediate portion of the seal member 8 in which the outer peripheral surface of the insertion port 12 is fitted to the inner peripheral surface of the receiving port 5. It is inserted inward of the receiving port 5 in the tube axis C direction in a state where it abuts against 8b. Here, in the present invention, the insertion step refers to the insertion port 12 from the opening 5 opening side of the seal member 8 which is the support portion of the present invention to the inside of the reception port 5 until a sealing process described later. The process to perform is shown.

  The outer diameter of the insertion slot 12 does not necessarily have to be substantially the same as the inner diameter of the fitting portion 8a and the intermediate portion 8b of the seal member 8. For example, the outer diameter of the insertion slot 12 is the fitting portion. 8a and the intermediate portion 8b are formed slightly larger in inner diameter than the inner diameter of the intermediate portion 8b. In the insertion process, the outer peripheral surface of the insertion port 12 is received in the direction of the tube axis C in a state of being in pressure contact with the fitting portion 8a and the intermediate portion 8b. The joint body may be connected by being inserted inward of the mouth 5. By doing in this way, the watertightness which seals the clearance gap between the inner surface of the receiving port 5 and the outer surface of the insertion port 12 increases more.

  Further, the outer diameter of the insertion slot 12 may be formed to be slightly smaller than the inner diameters of the fitting part 8a and the intermediate part 8b, so that the insertion slot 12 can be smoothly received in the insertion process. It is inserted toward the inside of the mouth 5.

  When the insertion port 12 is inserted into the fitting portion 8a and the intermediate portion 8b of the seal member 8 and the insertion process is completed, the insertion direction of the insertion port 12 with respect to the tube axis direction of the receiving port 5 is performed by the correction means described later in the correction step. To correct.

  The correction means used in the correction process will be described. As shown in FIG. 4, a fixing ring 15 having a split structure is fixedly attached to the outer surface in the vicinity of the tip of the receiving port 5, and similarly to the outer surface of the insertion port 12. Also, the fixing ring 16 is fixedly attached. Next, the engagement bolt nuts 17 and 18 are engaged with the engagement holes 15a and 16a provided on both sides of the fixing rings 15 and 16 in the direction of the tube axis C, respectively.

  Then, the engagement bolt nut 17 or the engagement bolt nut 18 is adjusted and screwed by using the fixing ring 15 as a reaction force according to the displacement of the insertion port 12 in the insertion direction with respect to the tube axis C direction of the receiving port 5. This makes it possible to correct the displacement in the insertion direction.

  Here, when performing a correction process, the insertion port 12 is the state supported by the fitting part 8a and the intermediate part 8b of the seal member 8 which were inserted by the inner surface of the receiving port 5. FIG. In particular, the fitting portion 8a and the intermediate portion 8b are formed substantially parallel to the tube axis C, and have a support portion that guides and supports the insertion opening 12 in the correction process. By doing in this way, a joint body can be connected, without requiring the special support apparatus etc. for supporting the insertion port 12, irrespective of the shape of the member which comprises the receiving port 5, or the insertion port 12 outer surface.

Further, the inner peripheral surfaces of the fitting portion 8a and the intermediate portion 8b have a predetermined length with respect to the tube axis C and are formed substantially parallel to each other. Since the seal member 8 does not come into contact with the valve portion 8c of the seal member 8 while being in contact with the peripheral surface, the seal member 8 does not come off from the recess portion 5a of the receiving port and does not leak, and the insertion port 12 in the direction of the tube axis C The insertion direction is easily corrected in the correction process, and the molding process for manufacturing the seal member 8 is easy. Furthermore, if the insertion slot 12 is inserted, the insertion direction is corrected almost automatically.

  Further, the rubber hardness of the fitting portion 8a and the intermediate portion 8b is formed to be larger than the rubber hardness of the valve portion 8. By doing so, the insertion port inserted into the inner surface of the receiving port 5 in the correction process. 12 can be stably supported.

  The correction process of the present invention is not necessarily limited to the process performed after the end of the insertion process as in the present embodiment, and the insertion direction of the insertion slot 12 needs to be corrected even during the insertion process. For example, a correction process may be performed in the middle. As described above, since the fitting portion 8a and the intermediate portion 8b of the seal member 8 have the support portions, the insertion portion is in the middle of the insertion process, regardless of the position of the distal end portion of the insertion port 12 on the inner surface of the receiving port 5. The insertion opening 12 is supported, and the above-described correction process is possible.

  Similarly, the correction process is not necessarily limited to one time, and may be performed a plurality of times during or after the insertion process, if necessary.

  Further, in the correction process of the present embodiment, the fixing rings 15 and 16 are fixedly attached to the outer surface of the receiving port 5 and the outer surface of the insertion port 12, respectively, and the fixing ring 15 is used as a reaction force. Although the insertion direction of the insertion slot 12 has been corrected by adjusting and screwing the nuts 17 and 18, the correction process is performed in a state where the insertion slot 12 is supported by the fitting portion 8a and the intermediate portion 8b of the seal member 8. If possible, the member for performing the correction step is not limited to the above member.

  Furthermore, depending on conditions such as the size of the tube diameter or the degree of sealing, the correction process may be performed only by human power without using the fixing rings 15 and 16 and the engagement bolt nuts 17 and 18, but in this case In this case, since the insertion opening 12 is secured in a state supported by the fitting portion 8a and the intermediate portion 8b of the seal member 8, the manual operation can be performed.

  Further, the cross-sectional shape of the valve portion 8c is constituted by a ring body formed in a substantially circular shape when not compressed, and the insertion opening 12 is inserted substantially parallel to the tube axis C as described above. As a result, in the sealing process, when the valve portion 8c is compressed on the outer surface of the insertion port 12 inserted into the receiving port 5, the stress due to the compression is equally applied to the peripheral surface of the valve portion 8c. The gap between the inner surface of the mouth 5 and the outer surface of the insertion opening 12 is stably sealed.

  Next, the sealing process and the fixing process constituting the joint body connecting method of the present invention will be described.

  The sealing process is performed after the insertion process or the correction process. As shown in FIG. 3A, the insertion port 12 of the straight pipe 11 is inserted toward the inside of the receiving port 5, and the valve portion 8c is compressed by the outer peripheral surface of the insertion port 12, The gap between the inner surface of the receiving port 5 and the outer surface of the insertion port 12 is sealed. Since the outer surface of the distal end portion 12a of the insertion port 12 to be inserted inward of the receiving port 5 is formed into a tapered surface, the valve portion 8c is gradually moved inward of the receiving port 5 as the insertion port 12 is inserted in the sealing process. The valve portion 8c is smoothly compressed in the gap between the inner surface of the receiving port 5 and the outer surface of the insertion port 12, so that the gap can be reliably sealed as shown in FIG. .

  Even in the sealing process, by inserting the engaging bolt nuts 17 and 18 attached to the outer surfaces of the receiving port 5 and the inserting port 12 as described above, the inserting port 12 becomes inward of the inner surface of the receiving port 5. The valve portion 8 c can be compressed by the outer surface of the insertion opening 12.

  Next, the fixing step is performed after the sealing step. As shown in FIGS. 3A, 3 </ b> B, and 5 </ b> B, the fixing member of the present invention has a gap between the inner surface of the receiving port 5 and the outer surface of the insertion port 12 near the outer end of the receiving port 5. After being sealed, it is composed of a push bolt 9 that fixedly connects the receiving port 5 and the insertion port 12. Further, the ring groove 7 formed along the circumferential direction on the inner peripheral surface near the outer end of the joint portion 5 at the tip of the push bolt 9 is similarly provided with a fixing pawl 10 constituting a fixing member. Yes.

  As shown in FIG. 3 (a), a push bolt 9 is screwed into a bolt hole 5b formed on the outer peripheral surface in the vicinity of the outer end of the receiving port 5 in a direction substantially orthogonal to the tube axis C. In this way, in the insertion process, the correction process or the sealing process, the push bolt 9 is not screwed in without interfering with the push bolt 9 and the fixing pawl 10. The insertion port 12 can be inserted into the inner surface of the receiving port 5.

  Further, as shown in FIG. 3B, a fixing pawl 10 is provided at the tip of the push bolt 9, and the push bolt 9 is screwed from the outside of the ring groove 7, and the fixing pawl 10 is connected to the straight pipe 11. Since it is in contact with the outer periphery of the fixed pawl 10 so as to be pressed against the outer peripheral surface, the sharp blade 10a of the fixed pawl 10 is pressed toward the tube axis C by the screwing of the push bolt 9 in the fixing step. 12 can bite into the outer peripheral surface of 12 and can securely connect the receiving port 5 and the insertion port 12. Furthermore, the fixed connection as described above can stably maintain the sealing performance of the joint body even when an external force or an internal pressure is applied to the receiving port 5 or the insertion port 12.

  Note that the above-described fixed connection means that the sealed state of the joint body is stably maintained, and the connected receiving port 5 and the insertion port 12 are not necessarily rigid. It does not mean to be united. Therefore, when an external force is applied to the joint body, the connected receiving port 5 and the insertion port 12 are orthogonal to the tube axis C with the sharp blade 10a of the fixed claw 10 biting into the outer peripheral surface of the insertion port 12 as the center. Even if it is elastically bent in the direction, it is included in the above-described fixed connection state.

  As shown in FIG. 3B (see also FIG. 7), the sharp blade 10 a of the fixed pawl 10 is formed sharply inward of the receiving port 5 and swings at the tip of the push bolt 9. Since the joint body is sealed, the insertion port 12 and the receiving port 5 are formed sharply even when an external force is applied so as to be separated from each other in the tube axis C direction. The sharp blade 10a of the fixed pawl 10 further bites into the outer peripheral surface of the insertion slot 12, and the sealing performance of the joint body is further maintained.

  Note that the push bolt, which is a fixing member of the present invention, does not necessarily have to be formed in a direction perpendicular to the tube axis C. For example, the push bolt is formed so as to be screwed into the tube axis C in an oblique direction. May be.

  Further, for example, a push bolt formed on a tapered surface whose outer peripheral surface of the tip portion is reduced in diameter toward the front is disposed substantially parallel to the tube axis C on the outer end surface of the receiving port, and the push bolt is screwed. The taper surface may fix the receiving port and the insertion port by pressing the outer surface of the insertion port through a fixing claw disposed between the tapered surface and the insertion port outer surface. .

  As shown in FIG. 5 (a), the receiving ports 5 and 5 of this embodiment are formed at both ends of the elbow pipe 2 as shown in a part of the pipe member in FIG. Since the joint body can be formed at any end portion of the elbow pipe 2, the pipe member can be provided with a degree of freedom.

  As a modification of the seal member, as shown in FIG. 7, a tip portion 12a formed on a tapered surface of the insertion port 12 in which a part of the cross-sectional shape of the valve portion 8c ′ of the seal member 8 ′ is inserted. May be formed on the tapered surface 8c′1 that is reduced inward in the tube axis C direction.

  By doing in this way, with the insertion of the insertion port 12 which is an insertion port, the valve part 8c 'of sealing member 8' is gradually received in the pipe-axis C direction, without pressing inward of the receiving port 5. The valve portion 8c ′ is smoothly compressed in the gap between the inner surface of the receiving port and the outer surface of the insertion port, so that the gap can be reliably sealed.

  Further, if the valve portion 8c ′ is partially formed in the tapered surface 8c′1 as described above, the valve portion 8c ′ can be connected to the tube axis C regardless of the shape of the distal end portion of the insertion port. There is an effect of gradually pressing uniformly toward the inner surface of the receiving port and sealing the gap without pressing inward of the receiving port in the direction.

  Further, the intermediate portion 8b of the seal member 8 is formed thinner in the direction orthogonal to the tube axis C than the valve portion 8c, and in this way, the outer surface of the valve portion 8c near the intermediate portion 8b A gap K is formed between the inner surface of the receiving port 5 and, in the sealing process, when the valve portion 8c is compressed, the valve portion 8c bulges toward the gap K. Therefore, the resistance required to compress the valve portion 8c is small.

  The gap K in this embodiment is formed between the outer surface of both the intermediate portion 8b and the valve portion 8c and the inner surface of the joint portion 5. For example, the outer surface of the intermediate portion 8b is connected to the inner surface of the receiving port 5. A gap may be formed between the outer surface of only the valve portion 8 c and the inner surface of the receiving port 5.

  Further, the intermediate portion 8b of the seal member 8 has a predetermined length in the tube axis C direction, and the fitting portion 8a having an inner diameter larger than the inner diameter of the valve portion 8c is the recess 5a of the receiving port 5. Since the valve portion 8c and the fitting portion 8a are separated from each other by a predetermined length even when the valve portion 8c is compressed on the outer surface of the insertion port 12 to be inserted into the receiving port 5. In the sealing process, even if the valve portion 8c is compressed, the fitting portion 8a is not disengaged from the recess 5a of the receiving port 5, and the fitting portion 8a is hardly affected by the compression of the valve portion 8c. The elastic force of the valve portion 8c can be increased to further improve the sealed state of the gap between the inner surface of the receiving port 5 and the outer surface of the insertion port 12. Further, since the valve portion 8c that seals the gap between the inner surface of the receiving port 5 and the outer surface of the insertion port 12 is positioned inward of the inner surface of the receiving port 5 for a predetermined length, an external force is applied to the joint body in a sealed state. In this case, since the movement of the joint body in the direction orthogonal to the tube axis C is restricted, the sealing performance of the joint body can be maintained.

  As shown in FIG. 8, the fixed pawl 10 can tilt with the bottom surface of the push bolt 9 as a fulcrum in the ring groove 7, and when the straight pipe 11 tries to move relatively in the tube axis direction away from the joint portion 5, A sharp blade 10a formed at the tip of the fixed claw 10 is formed in a cross-sectional shape so as to bite into the outer peripheral surface of the straight pipe 11 toward the pipe axis, as indicated by a two-dot chain line.

  Due to the relative movement of the straight pipe 11 and the joint portion 5, the fixed pawl 10 tilts in the ring groove 7, and this tilting is appropriately stopped in a state where the sharp blade 10 a bites into the outer peripheral surface of the straight pipe 11. The tilting of the fixed pawl 10 is stopped by contacting the tilting stop surface 7a outside the ring groove 7 at the maximum. However, when the tilting of the fixed pawl 10 stops, the amount of biting is maximized and the straight pipe 11 and the joint portion. Since the relative movement with respect to 5 is prevented, the straight pipe 11 and the joint part 5 do not move beyond a predetermined movement amount to cause water leakage.

  FIG. 9 shows a first modification of the fixing member.

  A fixed pawl 23 having a spherical concave portion 23b formed at the top and two sharp blades 23a provided on the fluid pipe side is disposed in the ring groove 25 in a state where it can tilt with the tip of the push bolt 24 as a fulcrum. ing. A push bolt 24 having a spherical convex portion 24a that engages with the spherical concave portion 23b at the tip is screwed into the ring groove 25 substantially perpendicular to the tube axis. A tilt stop surface 25 a that prevents the tilting of the fixed pawl 23 from being excessively tilted is formed in the front and rear of the ring groove 25 in the axial direction. The outer anti-tilt surface 25a is provided so as to be substantially perpendicular to the tube axis, and the inner anti-tilt surface 25a is provided to fall outward.

  When attaching the pipe connecting device, the fixed claw 23 has two sharp blades 23a and 23a in contact with the outer peripheral surface of the fluid pipe, and is pushed by the push bolt 24 to bite into the fluid pipe by a predetermined amount. When the pipe connecting device and the fluid pipe start relative movement, the fixed pawl 23 tilts with the spherical convex portion 24a of the push bolt 24 as a fulcrum. The fixed pawl 23 continues to tilt toward the tube axis while increasing the amount of biting with relative movement, and the tilting is stopped as appropriate when the sharp blade 23a bites into the outer peripheral surface of the fluid pipe. The tilting of the fixed pawl 23 stops at the maximum contact with the outer tilting stop surface 25a as shown by the two-dot chain line, but when the tilting of the fixed pawl 23 stops, the relative movement between the pipe connecting device and the fluid pipe is stopped. Is prevented and prevents water leakage.

  FIG. 10 shows a second modification of the fixing member.

  A fixed claw 33 having a top formed in a circular arc shape and provided with a sharp blade 33a on the fluid pipe side is disposed in the ring groove 35 so as to be tiltable with the tip of the push bolt 34 as a fulcrum. A push bolt 34 having a conical tip is screwed into the ring groove 35 from the tube axis direction. A tilt stop surface 35 a for preventing the tilting of the fixed pawl 33 is formed on the front and rear in the axial direction in the ring groove 35. The outer tilting stop surface 35a is provided so as to be substantially perpendicular to the tube axis, and the inner tilting stop surface 35a is tilted toward the outer side.

  When attaching the pipe connecting device, the fixed claw 33 has a sharp blade 33a in contact with the outer peripheral surface of the fluid pipe, and is pushed by the push bolt 34 to bite into the fluid pipe by a predetermined amount. When the pipe connecting device and the fluid pipe start to move relative to each other, the fixed pawl 33 tilts with the contact point with the conical part of the push bolt 34 as a fulcrum. The fixed pawl 33 continues to tilt toward the tube axis while increasing the amount of biting with relative movement, and the tilting is stopped as appropriate when the sharp blade 33a bites into the outer peripheral surface of the fluid pipe. The tilting of the fixed pawl 33 stops at the maximum contact with the outer tilting stop surface 35a as shown by the two-dot chain line, but when the tilting of the fixed pawl 33 stops, the relative movement between the pipe connecting device and the fluid pipe is stopped. Is prevented and prevents water leakage.

  FIG. 11 shows a third modification of the fixing member.

  An inclined surface 43c that is angled with respect to the tube axis is formed on the outside, and a fixed pawl 43 having two sharp blades 43a provided on the fluid tube side slides in contact with the flat portion 44b of the push bolt 44. It is arranged in the ring groove 45 in a possible state. A push bolt 44 having a flat surface 44b formed at the tip thereof is screwed into the ring groove 45 from a direction substantially perpendicular to the inclined surface 43c so that the inclined surface 43c and the flat surface 44b move and come into contact with each other. It has been entered. A movement stop surface 45b is formed on the front and rear of the ring groove 45 in the axial direction so as to abut against the fixed pawl 43 and stop its movement.

  When the pipe connecting device is attached, the fixed claw 43 has two sharp blades 43a and 43a in contact with the outer peripheral surface of the fluid pipe, and is pushed by the push bolt 44 to bite into the fluid pipe by a predetermined amount. When the pipe connecting device and the fluid pipe start to move relative to each other, the fixed pawl 43 slides in the pipe axis direction while the flat portion 44b of the push bolt 44 and the inclined surface 43c are in contact with each other. The fixed pawl 43 moves while increasing the amount of biting by the wedge action with the relative movement, and this movement is stopped appropriately when the sharp blade 43a bites into the outer peripheral surface of the fluid pipe. The movement of the fixed pawl 43 stops at the maximum contact with the outer movement stop surface 45b as shown by the two-dot chain line, but when the movement of the fixed pawl 43 stops, the relative movement between the pipe connecting device and the fluid pipe is stopped. Is prevented and prevents water leakage.

  FIG. 12 shows a fourth modification of the fixing member.

  This fixing member is formed with a female screw 53d portion into which a push bolt 54 is screwed, a fixing claw 53 provided with two sharp blades 53a on the fluid pipe side, and an inclined surface 55c angled with respect to the pipe axis. Is formed on the inner surface of the ceiling of the ring groove 55, a long hole 55d is provided in the ceiling, and a ring-shaped groove 55 in which movement stop surfaces 55b are formed on both surfaces in the axial direction, and a large disc-shaped member that contacts the inclined surface 55c. The diameter portion 54c is integrally formed, and includes a push bolt 54 having a male screw portion 54d at the tip.

  The fixing pawl 53 is screwed into the male screw portion 54d of the push bolt 54 inserted through the elongated hole 55d, and is disposed in the ring groove in a state where the large diameter portion 54c of the push bolt 54 and the inclined surface 55c are slidable. ing.

  When the pipe connection device is attached, the fixed claw 53 has two sharp blades 53a and 53a in contact with the outer peripheral surface of the fluid pipe, and is pushed by the push bolt 54 to bite into the fluid pipe by a predetermined amount. When the pipe connecting device and the fluid pipe start to move relative to each other, the fixed pawl 53 moves together with the pipe, and the push bolt 54 screwed to the fixed pawl 53 is also in contact with the large diameter portion 54c and the inclined surface 55c. Slide in the direction. The fixed pawl 53 moves while increasing the amount of biting by the wedge action of the large-diameter portion 54c and the inclined surface 55c, and this movement is appropriately stopped in a state where the sharp blade 53a bites into the outer peripheral surface of the fluid pipe. The movement of the fixed pawl 53 stops at the maximum contact with the outer movement stop surface 55b as shown by the two-dot chain line, but when the movement of the fixed pawl 53 stops, the relative movement between the pipe connecting device and the fluid pipe is stopped. Is prevented and prevents water leakage.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, in the above-described embodiment, the insertion port 12 and the receiving port 5 connected to each other constitute a pipe member composed of the straight pipe 11 and the elbow pipe 2 as shown in FIGS. The insertion port and the receiving port used in the invention are not necessarily limited to the straight tube 11 and the elbow tube 2 as long as they have a structure that can be connected to each other. It may be a hose or the like. Further, the insertion port and the receiving port may constitute a part of various pumps or storage tanks.

  Moreover, in the said Example, although the receiving port 5 is formed in the both ends side of the elbow pipe 2 which is a curved pipe, it is not necessarily the both ends side of the elbow pipe 2, and the receiving port 5 is one end of the elbow pipe 2. It may be formed only on the side.

  Further, in the above embodiment, the elbow pipe 2 which is the curved pipe of the present invention in which the receiving port 5 is formed is bent at a substantially 90 degrees along the pipe axis as shown in FIGS. 1 and 3 (b). However, the angle of the curved portion is not necessarily limited to approximately 90 degrees, and may be any number of times as long as the curved portion is at least partially along the tube axis.

  Moreover, in the said Example, although the member used for fixing of an insertion port and a receiving port is comprised by the push bolt 9 which has the fixing claw 10 ahead, if this fixing is made appropriate, it will be fixed. The structure of the member to be used is not necessarily limited to the above embodiment.

  Furthermore, in the said Example, although the fixed nail | claw 10 is provided in the tip of the push bolt 9 which is a fixing member of an insertion port and a receiving port, connecting a receiving port and an insertion port fixedly reliably. If necessary, the fixing claw 10 is not necessarily provided. For example, a concave portion is formed on the outer peripheral surface of the insertion opening at a position where it abuts on the tip of the push bolt 9, and the tip of the push bolt 9 is formed in the concave portion. It may be screwed.

  Moreover, in the said Example, the outer peripheral surface of the front-end | tip part 12a of the insertion port 12 is formed in the taper surface which diameter-reduces toward a front-end | tip, and the valve | bulb part 8c is gradually inserted into the inner surface of the receiving port 5 with the insertion of the insertion port 12. In order to press uniformly in the direction, the valve portion 8c is smoothly compressed in the gap between the inner surface of the receiving port 5 and the outer surface of the insertion port 12. However, since the intermediate portion 8b has a predetermined length, Even if the outer peripheral surface of the distal end portion 12a of the mouth 12 is not necessarily formed into a tapered surface, the gap between the inner surface of the receiving port 5 and the outer surface of the insertion port 12 can be reliably sealed.

  Moreover, in the said Example, although the rubber hardness of the fitting part 8a and the intermediate part 8b of the sealing member 8 is shape | molded larger than the rubber hardness of the valve | bulb part 8c, the sealing member 8 is at least the front-end | tip of the insertion port 12. If the support part for guiding and supporting the part is provided, even if the rubber hardness of the fitting part 8a and the intermediate part 8b is not necessarily formed larger than that of the valve part 8c, for example, the entire sealing member is a uniform rubber. It may be molded with hardness.

  Furthermore, in the said Example, although the outer diameter of the insertion port 12 is formed in the internal diameter of the fitting part 8a and the intermediate part 8b, and the substantially same diameter or a slightly larger diameter, the inner surface of a receiving port and the outer surface of an insertion port For example, the outer diameter of the insertion opening may be slightly smaller than the inner diameters of the fitting part and the intermediate part.

  Moreover, in the said Example, although the internal diameter of the fitting part 8a and the intermediate part 8b is formed in substantially the same diameter, if the sealing member has a support part which guides and supports at least the front-end | tip part of an insertion port, it is. However, the inner diameters of the fitting part and the intermediate part are not necessarily formed to be substantially the same diameter. For example, the inner diameter of the intermediate part may be slightly smaller than the inner diameter of the fitting part.

  In the above embodiment, the fixed pawl is provided so as to bite into the outer peripheral surface of the straight pipe 11 when the straight pipe 11 moves in one direction. It may be provided symmetrically so that it acts on either the left or right movement, and may be provided so as to bite into the outer peripheral surface of the straight pipe 11 even when the straight pipe 11 moves in the other direction.

It is the schematic which shows the arrangement | positioning condition of the pipe line member connected by the connection method of the coupling body in the Example of this invention. It is a partial cross section figure which shows the receptacle and insertion port by which the sealing member was fitted. (A) is a partial cross section figure which shows the condition of an insertion process, (b) is a partial cross section figure which shows the condition of a sealing process and a fixing process. It is a top view which shows the condition of a correction process. (A) is a top view which shows the curved pipe in which the receiving port was formed in both ends, (b) is AA sectional drawing of (a). It is an expanded sectional view which shows the condition of the positioning process. It is an expanded sectional view which shows the condition of the insertion process in the modification of a sealing member. It is an expanded sectional view which shows a fixing member. It is a 1st modification of a fixing member. It is a 2nd modification of a fixing member. It is a 3rd modification of a fixing member. It is a 4th modification of a fixing member.

Explanation of symbols

1 Pipeline member 2 Elbow pipe (curved pipe)
3 Embedded object 5 Receptacle 5a Recessed part 5b Bolt hole 5c Tapered part (guide part)
6 Pipe part 7 Ring groove 7a Tilt stop surface 8, 8 'Seal member 8a Fitting part (support part)
8b Middle part (support part)
8c, 8c 'Valve portion 8c'1 Tapered surface 9 Push bolt (fixing member)
10 Fixed pawl (fixing member)
10a sharp blade 11 straight tube 12 insertion port 12a tip 13 bend tube 15, 16 fixing ring 15a, 16a engagement hole 17, 18 engagement bolt nut 23 fixing claw 23a sharp blade 23b spherical concave portion 24 push bolt 24a spherical convex shape Portion 25 Ring groove 25a Tilt stop surface 33 Fixed pawl 33a Pointed blade 34 Push bolt 35 Ring groove 35a Tilt stop surface 43 Fixed pawl 43a Pointed blade 43c Inclined surface 44 Push bolt 44b Flat portion 45 Ring groove 45b Movement stop surface 53 Fixed pawl 53a Pointed blade 53d Female threaded portion 54 Push bolt 54c Large diameter portion 54d Male threaded portion 55 Ring groove 55b Movement stop surface 55c Inclined surface 55d Long hole C Pipe axis K Air gap

Claims (7)

A sealing step of watertightly sealing the gap between the inner surface of the receiving port in which an elastic sealing member is provided on the inner surface along the circumferential direction and the outer surface of the insertion port with the sealing member; An insertion step of inserting the insertion port from the receiving port opening side toward the sealing port toward the inner side of the receiving port, and a connecting method of a joint body constituted at least from:
The seal member is fitted in a recess formed in the inner surface of the receiving port along the circumferential direction, and is located inward of the receiving port with respect to the tube axis direction than the fitting unit. And a valve portion for watertightly sealing the gap in the sealing step, and an intermediate portion having a predetermined length in the tube axis direction interposed between the fitting portion and the valve portion. The inner peripheral surface of the portion and the intermediate portion is formed substantially parallel to the tube axis, and has a support portion that can contact the outer peripheral surface of the insertion opening, and during or after the insertion step, The correction step of correcting the insertion direction of the insertion port with respect to the tube axis direction of the receiving port by guiding and supporting at least the distal end portion of the insertion port using the support portion is further configured. The connection method of the joint body. The joint body connection method according to claim 1 , wherein the seal member is formed of a rubber body, and the rubber hardness of the fitting portion and the intermediate portion is at least larger than the rubber hardness of the valve portion. An inner surface of the receiving port on the opening side of the receiving port with respect to the seal member has a guide portion, and the insertion direction of the insertion port is changed using the guide portion before the insertion step. at least a positioning step of positioning by guiding the tip, the connection method of the joint body according to any one of claims 1 to 2 further configured mouth. A fixing member is formed in the vicinity of the outer end of the receiving port, and after the sealing step, a fixing step for further fixedly connecting the receiving port and the insertion port is further configured by the fixing member. The connection method of the joint body in any one of Claim 1 thru | or 3 . The joint body connection method according to claim 4 , wherein the fixing member includes a push bolt screwed into a bolt hole formed on an outer peripheral surface of the receiving port. The joint body connection method according to claim 5 , wherein a fixing claw is provided at a front end of the push bolt. The joint connection method according to any one of claims 1 to 6 , wherein the receiving port is formed at both ends of a curved pipe having a curved portion at least partially along the pipe axis.

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