JP4722719B2 - Joint body - Google Patents

Description

  The present invention relates to a joint body that watertightly connects an insertion port of another fluid pipe to a receiving port of one fluid pipe.

  The conventional joint body is fixedly connected to the receiving opening and the insertion opening, and the outer surface of the receiving opening and the insertion opening is covered with a corrosion prevention body to obtain a corrosion prevention structure in the joint body (for example, Patent Document 1). reference).

JP 2001-99391 A (second page, FIG. 1)

  The means for fixedly connecting the receiving port and the insertion port is formed by, for example, being screwed into a bolt hole formed on the outer surface of the receiving port as a fixing member, and the head protruding outside the outer surface of the receiving port. In many cases, a conventional means such as a fixed connection between the receiving port and the insertion port is used by pressing the insertion port with the bolt.

  However, in Patent Document 1, when the receiving port and the insertion port are connected by the fixing member such as the bolt described above, when the outer surface of the receiving port and the insertion port is covered with the corrosion protection body, the head of the fixing member Is formed so as to protrude outward from the outer surface of the receiving port, and the corrosion-resistant body comes into contact with the head of the fixing member and is caught, and the outer surface of the receiving port and the insertion port cannot be covered smoothly. There is a risk of damage such as tearing by the head of the fixing member.

  The present invention has been made paying attention to such problems, and a joint body that can smoothly coat the outer surface of the receiving port and the insertion port without the corrosion-resistant body coming into contact with the head of the fixing member and being caught. The purpose is to provide.

In order to solve the above problem, a joint body according to claim 1 of the present invention is
A joint body that watertightly connects the insertion port of the other fluid pipe to the reception port of one fluid pipe, and covers the outer surface of the reception port and the insertion port with a corrosion-resistant body ,
With connecting the said socket spigot by bolts heads screwed into the bolt holes formed in the outer surface of the socket is formed to protrude on an outer surface outside of the socket, the head of the bolt The portion is covered with a covering whose outer surface is made of a lubricant.
According to this feature, the head portion of the bolt that protrudes outward from the outer surface of the receiving port is covered with a covering body made of a lubricant, so that the corrosion protection body comes into contact with and catches the head portion of the bolt. The outer surface of the receiving port and the insertion port can be covered smoothly without any problems.
Further, by using a general-purpose bolt, the receiving port and the insertion port can be connected with an inexpensive member.

The joint body according to claim 2 of the present invention is the joint body according to claim 1 ,
The covering is formed in a bag-like body that covers the bolt protruding outward from the outer surface of the receiving port, and the bottom of the bag-like body is inflated inward toward the mouth side of the bag-like body. In the state where the bolt is fully screwed into the bolt hole, the bottom inner surface of the bag-like body covering the bolt is in a state of being close to or in contact with the head outer surface of the bolt, In the state where the bolt is screwed into the bolt hole inadequately, the bottom of the bag-like body bulges outward from the bag-like body.
According to this feature, whether the bolt is sufficiently screwed or not sufficiently screwed depending on the state of the bottom of the cover body formed of a bag-like body covered with the bolt. I can confirm.

The joint body according to claim 3 of the present invention is the joint body according to claim 2 ,
A notch is formed in the mouth of the bag-like body toward the bottom side of the bag-like body.
According to this feature, the state in which the bolt is screwed in insufficiently in the bolt hole is confirmed, and when the bolt is further screwed, the notch formed in the mouth portion of the bag-like body is used. Since the diameter of the mouth can be easily increased, it is easy to attach and remove the bag-like body covering the head of the bolt.

  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 plan view showing a connection state between a receiving port and an insertion port in the embodiment of the present invention. FIG. 2 is a partial cross-sectional view showing a state in which the receiving port and the insertion port are connected. FIG. 3 is a partial cross-sectional view showing a bag-like body that covers a bolt screwed into a receiving port. FIG. 4A is a partial cross-sectional view showing a situation where the bag-like body is covered in a state where the bolt is sufficiently screwed, and FIG. 4B is a diagram showing the bag in a state where the bolt is screwed insufficiently. It is a partial cross section figure which shows the condition which covered the cylindrical body. FIG. 5A is a partial cross-sectional view showing a situation where the bag-like body is covered in a state where the bolt in the first modification of the present invention is sufficiently screwed, and FIG. 5B is an insufficient bolt. It is a fragmentary sectional view which shows the condition which coat | covered the bag-like body in the state screwed in, (c) is a fragmentary sectional view which shows the condition which removes a bag-like body from a volt | bolt. FIGS. 6A and 6B are front views showing a situation where the outer surfaces of the receiving port and the insertion port are covered with a covering. Fig.7 (a) is a partial cross section figure which shows the condition which coat | covered the bag-shaped body in the state in which the volt | bolt in the 2nd modification of this invention was fully screwed in, (b) is not enough volt | bolt. It is a partial cross section figure which shows the condition which coat | covered the bag-like body in the state screwed in, (c) is a top view of a bag-like body.

  As shown in FIG. 1, the joint body of the present invention watertightly connects the receiving port 5 of the straight pipe 2 as one fluid pipe and the insertion port 12 of the straight pipe 11 as the other fluid pipe. Is. In addition, fluid such as water and sewage or gas flows down in the fluid pipe.

  In addition, the joint body of the present invention includes a receiving port 5 formed at the end of the straight tube 2, an insertion port 12 formed at the end of the straight tube 11 inserted into the inner surface of the receiving port 5, It is mainly comprised from the volt | bolt 9 as a fixing member of the receiving port 5 and the insertion port 12. FIG.

  On the outer surface of the straight pipe 2 at a position spaced apart from the receiving port 5 in the direction of the tube axis C, the tube-shaped corrosion protection body 20 is straight with the tip folded back so as to have a slack in the direction of the tube axis C in advance. It is attached over the circumferential direction of the tube 2 and can cover the outer surfaces of the receiving port 5 and the insertion port 12 as described later. Similarly, on the outer surface of the straight tube 11 at a position spaced apart from the insertion opening 12 in the tube axis C direction, a tube-shaped corrosion-resistant body 21 is folded back so as to have a slack beforehand in the tube axis C direction. Thus, it is attached over the circumferential direction of the straight pipe 11 so that the outer surfaces of the receiving port 5 and the insertion port 12 can be covered.

  In addition, bolt holes 5b are formed at substantially equal intervals in the circumferential direction on the outer peripheral surface near the outer end of the receiving port 5, and are screwed in the direction perpendicular to the tube axis C from the outside of the straight tube 2. A bolt 9 is configured as a fixing member between the receiving port 5 and the insertion port 12 (see FIG. 3).

  As shown in FIG. 2, a fixing claw 10 is provided at the tip of the bolt 9. The fixed pawl 10 is housed in a recess formed in the inner surface of the receiving port 5 along the circumferential direction.

  Next, the connection between the receiving port 5 and the insertion port 12 will be described. As shown in FIG. 1, a fixing ring 15 having a divided structure is fixedly attached to the outer surface in the vicinity of the tip of the receiving port 5. The fixing ring 16 is fixedly attached to the outer surface of the insertion opening 12. 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.

  By inserting the engaging bolt nuts 17 and 18 while adjusting each other using the fixing rings 15 and 16 as a reaction force, the insertion port 12 is inserted toward the inside of the receiving port 5, The seal member 8 is compressed by the outer peripheral surface of the insertion port 12 to seal the gap between the inner surface of the receiving port 5 and the outer surface of the insertion port 12 in a watertight manner.

  Note that the connection means between the receiving port 5 and the insertion port 12 is not necessarily limited to that using the fixing rings 15 and 16 and the engagement bolt nuts 17 and 18 described above, and the receiving port 5 and the insertion port 12 are watertight. Anything that can be connected is acceptable.

  Next, the fixing member of the receiving port 5 and the insertion port 12 will be described. As shown in FIG. 3, the fixing member of the present invention is located near the outer end of the receiving port 5 and the inner surface of the receiving port 5 and the insertion port 12. After the gap with the outer surface is sealed, it is composed of a general-purpose bolt 9 that fixedly connects the receiving port 5 and the insertion port 12, and at least the head 9 a of the bolt 9 is outside the outer surface of the receiving port 5. It protrudes in the direction. In this way, by using a general-purpose bolt as a fixing member, the receiving port 5 and the insertion port 12 can be connected with an inexpensive member.

  Further, as shown in FIG. 2, a fixing pawl 10 is provided at the tip of the bolt 9, so that the tip 10 a of the fixing pawl 10 faces the tube axis C by screwing in the bolt 9. It is pushed and bites into the outer peripheral surface of the insertion slot 12 so that the receptacle 5 and the insertion slot 12 can be securely connected. 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.

  The bolt as the fixing member of the present invention does not necessarily have to be formed in a direction orthogonal to the tube axis C. For example, the bolt is screwed in an oblique direction having a predetermined angle other than the direction orthogonal to the tube axis C. It may be formed as described.

  Further, for example, a 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 bolt is screwed. At the same time, the taper surface may fix the receiving port and the insertion port by pressing the outer surface of the insertion port via a fixing claw disposed between the tapered surface and the outer surface of the insertion port.

  Next, as shown in FIGS. 4A and 4B, the bag-like body 25 as a covering body that covers the bolt 9 protruding outward from the outer surface of the receiving port 5 will be described. The outer surface 25c is made of a lubricant and has substantially the same diameter as the head portion 9a of the bolt 9, and the bottom portion 25b bulges inward toward the mouth portion 25a side of the bag-like body 25 in the natural state. It is formed into a shape. Further, although not particularly illustrated, the bag-like body 25 of the present embodiment is formed in a circular shape in plan view. In addition, the planar view shape of a bag-shaped body should just be a shape according to the shape of a fixing member.

  As shown in FIG. 4A, in a state where the bolt 9 is sufficiently screwed into the bolt hole 5b, the mouth portion 25a of the bag-like body 25 contacts the outer surface of the receiving port 5 near the upper end of the bolt hole 5b. When the bag-like body 25 is covered with the portion of the bolt 9 protruding outward from the outer surface of the receiving port 5 until the position is reached, the inner surface of the bottom 25b of the bag-like body 25 covered with the bolt 9 is the outer surface of the head 9a of the bolt 9 It is in the state which adjoined or contacted.

  On the other hand, as shown in FIG. 4B, in the state where the bolt 9 is insufficiently screwed into the bolt hole 5b, the mouth portion 25a of the bag-like body 25 is the outer surface of the receiving port 5 near the upper end of the bolt hole 5b. If the bag-like body 25 is to be covered with the portion of the bolt 9 protruding outward from the outer surface of the receiving port 5 until it reaches the position where it abuts, the bag-like body 25 bulges inward toward the mouth 25a side. The bottom 25b that has been in contact with and pressed against the outer surface of the head 9a of the bolt 9 causes the bottom 25b to bulge outward from the bag 25.

  By doing so, depending on the state of the bottom 25b of the bag-like body 25 covered with the bolt 9, the bolt 9 is sufficiently screwed into the bolt hole 5b or the bolt 9 is not inserted into the bolt hole 5b. It can be confirmed whether the screw is fully inserted. As shown in FIG. 4B, when it is confirmed that the bolt 9 is screwed in insufficiently, the bag-like body 25 is once removed from the bolt 9, and the bolt 9 is removed from the bolt hole 5b. Then, the bag 25 is covered with the bolt 9 again.

  Note that the bag-like body as the covering body of the present invention is not necessarily limited to the present embodiment. For example, as shown in FIGS. 5A to 5C as a first modification of the present invention, the bag-shaped body 26 is used. A notch 26d may be formed in the mouth portion 26a toward the bottom portion 26b of the bag-like body 26.

  By doing in this way, as shown in FIG. 5A, the diameter of the mouth portion 26a can be easily expanded using the notch 26d formed in the mouth portion 26a of the bag-like body 26. Attachment of the bag-like body 26 covering the head portion 9a of the bolt 9 is facilitated. Similarly, as shown in FIG. 5B, when the bolt 9 is confirmed to be insufficiently screwed into the bolt hole 5b, and the bolt 9 is further sufficiently screwed into the bolt hole 5b, As shown in FIG. 5C, since the diameter of the mouth portion 26a can be easily increased by using the notch 26d formed in the mouth portion 26a of the bag-like body 26, the head portion 9a of the bolt 9 is Temporary removal of the covered bag-like body 26 is facilitated.

  Further, as shown in FIG. 7A as a second modification of the present invention, hinge portions 27f and 27g that are thin in sectional view and substantially circular in plan view are formed on the bottom 27b of the bag-like body 27. In addition, a substantially central portion of the inner surface of the bottom portion 27b may be formed on a protruding portion 27e that bulges toward the mouth portion 27a.

  By doing so, as shown in FIG. 7B, in the state in which the bolt 9 is insufficiently screwed into the bolt hole 5b, the mouth portion 27a of the bag 27 is in the vicinity of the upper end of the bolt hole 5b. When the bag-like body 27 is to be covered with the portion of the bolt 9 protruding outward from the outer surface of the receiving port 5 until it reaches a position where it contacts the outer surface of the receiving port 5, the bag-like body 27 faces toward the mouth portion 27 a. The protrusion 27e bulging inward is pressed against the outer surface of the head 9a of the bolt 9, so that the bottom 27b is easily bulged by the outer side of the bag 27, and the bolt 9 is bolted. It is easy to confirm that the hole 5b is inadequately screwed.

  As shown in FIG. 7C, the side peripheral portion 27h of the bag-like body 27 is formed in a hexagonal shape in plan view, and the head 9a of the bolt 9 formed in the same hexagonal shape in plan view. In addition, it can be bonded more.

  Further, as shown in FIG. 7 (a), a hook portion 27j bulging inward is formed on the inner surface of the side peripheral portion 27h in the vicinity of the mouth portion 27a of the bag-like body 27. When the body 27 covers the bolt 9, the latching portion 27 j can be latched with the lower edge of the head 9 a of the bolt 9, so that the bag-like body 27 is difficult to be removed from the bolt 9.

  Next, as described above, in the present embodiment, the bag-like body 25 is temporarily removed, and the bolt 9 in a state of being screwed in insufficiently is tightened into a state of being screwed in sufficiently. 25 is again covered on the head of the bolt 9. In this way, all the bolts 9 arranged in the circumferential direction of the receiving port 5 are sufficiently screwed into the bolt holes 5b, and all the bolts 9 are covered with the bag-like body 25. To do.

  Next, as shown in FIG. 6 (a), the tube-shaped anticorrosion body 20 previously attached over the circumferential direction of the straight pipe 2 as described above is directed toward the receiving port 5 and the insertion port 12 side. Then, after pulling in the tube axis C direction and covering the outer surfaces of the receiving port 5 and the insertion port 12, the end portion of the corrosion protection body 20 is fastened along the circumferential direction of the straight tube 11 by the band 22.

  In this case, since the bolt 9 protruding outward from the outer surface of the receiving port 5 is covered with the bag-like body 25 as a covering body made of a lubricant, the tube-shaped corrosion protection body 20 is replaced with the bolt 9. The outer surface of the receiving port 5 and the insertion port 12 can be covered smoothly without being brought into contact with and caught on the head.

  Next, as shown in FIG. 6 (b), the tube-shaped anticorrosive body 21 is pulled in the direction of the tube axis C toward the receiving port 5 and the insertion port 12 in the same manner as described above, and the receiving port 5 and the insertion port After covering the outer surface of 12, the end portion of the corrosion protection body 21 is fastened along the circumferential direction of the straight pipe 2 by the band 23.

  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 2 and the straight pipe 11 as shown in FIGS. The insertion port 12 and the receiving port 5 used in the invention are not necessarily limited to the straight tube 2 and the straight tube 11 as long as they have a configuration that can be connected to each other, for example, a T-shaped tube having three end portions or a tube. An elbow pipe having a curved portion in part along the axis may be used, or a hose having flexibility may be used. Moreover, the insertion port 12 and the receiving port 5 may comprise a part of various pumps or a storage tank.

  Moreover, in the said Example, although the tube-shaped corrosion prevention bodies 20 and 21 which coat | cover the outer surface of the receiving port 5 and the insertion port 12 are shown, a corrosion prevention body is a planar shape which coat | covers the outer surface of a receiving port and an insertion port. If it has a body, it does not necessarily need to be a tube shape, and may be formed in a sheet shape, for example.

  Moreover, in the said Example, although the general purpose volt | bolt 9 was shown as a fixing member which connects a receptacle and an insertion port, a fixing member is formed so that at least a head protrudes outside the outer surface of a receptacle. As long as it is, it is not necessarily limited to the bolt, and may be a known member that connects the receiving port and the insertion port.

  Moreover, in the said Example, although the fixing member of the insertion port 12 and the receiving port 5 is comprised by the volt | bolt 9 which has the fixed nail | claw 10 in the front, if this fixation is made appropriate, it will be the structure of a fixing member. Is not necessarily limited to the above-described embodiment. For example, the fixing pawl 10 is not provided, and a recess is formed on the outer peripheral surface of the insertion opening at a position where it abuts on the tip of the bolt 9. The bolt 9 may be screwed so as to be immersed in the recess.

It is a top view which shows the condition of the connection of a receptacle and an insertion opening in the Example of this invention. It is a partial cross section figure which shows the condition which connected the receptacle and the insertion opening. It is a partial cross section figure which shows the bag-like body which coat | covers the volt | bolt screwed in in the receptacle. (A) is a partial cross-sectional view showing a situation where a bag-like body is covered in a state where bolts are sufficiently screwed, and (b) is a bag-like body in a state where bolts are screwed in insufficiently. It is a partial cross section figure which shows the condition which coat | covered. (A) is a fragmentary sectional view which shows the condition which coat | covered the bag-like body in the state in which the volt | bolt in the 1st modification of this invention was fully screwed in, (b) is a bolt inadequately screwed. It is a partial cross section figure which shows the condition which coat | covered the bag-like body in the inserted state, (c) is a partial cross section figure which shows the condition which removes a bag-like body from a volt | bolt. (A), (b) is a front view which shows the condition which coat | covers the outer surface of a receptacle and an insertion port with a covering. (A) is a partial cross-sectional view showing a situation where a bag-like body is covered in a state in which the bolt in the second modified example of the present invention is fully screwed, and (b) is a screw with insufficient bolt. It is a partial cross section figure which shows the condition which coat | covered the bag-shaped body in the inserted state, (c) is a top view of a bag-shaped body.

Explanation of symbols

2 Straight pipe (fluid pipe)
5 Receptacle 5b Bolt hole 8 Seal member 9 Bolt 9a Head 10 Fixed claw 10a Tip 11 Straight pipe (fluid pipe)
12 Insert 20 Corrosion-proof body 21 Corrosion-proof body 22 Band 23 Band 25 Bag-like body 25a Mouth part 25b Bottom part 25c Outer surface 26 Bag-like body 26a Mouth part 26b Bottom part 26d Notch 27 Bag-like body 27a Mouth part 27b Bottom part 27e Projection part 27f Hinge Part 27g hinge part 27h side peripheral part 27j latching part C tube axis

Claims (3)

A joint body that watertightly connects the insertion port of the other fluid pipe to the reception port of one fluid pipe, and covers the outer surface of the reception port and the insertion port with a corrosion-resistant body ,
With connecting the said socket spigot by bolts heads screwed into the bolt holes formed in the outer surface of the socket is formed to protrude on an outer surface outside of the socket, the head of the bolt A joint body characterized in that the outer surface is covered with a covering body made of a lubricant. The covering is formed in a bag-like body that covers the bolt protruding outward from the outer surface of the receiving port, and the bottom of the bag-like body is inflated inward toward the mouth side of the bag-like body. In the state where the bolt is fully screwed into the bolt hole, the bottom inner surface of the bag-like body covering the bolt is in a state of being close to or in contact with the head outer surface of the bolt, in a state in which the bolt is inserted insufficiently threaded into the bolt holes, fitting of claim 1, characterized in that a state in which the bottom portion of the bag-like body is bulged outward of the bag-like body body. The joint body according to claim 2 , wherein a notch is formed in the mouth portion of the bag-like body toward the bottom side of the bag-like body.

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