JP7638828B2 - Fixtures - Google Patents

Description

The present invention relates to a fixture for mounting an installation body in an uninterrupted flow state within a housing that is hermetically fitted onto a fluid pipe.

Generally, there is a known construction method that allows an installation body such as a shutoff valve or switching valve device to be performed in an uninterrupted flow state by sealing an existing fluid pipe such as a water supply or gas pipe in a casing, cutting the fluid pipe inside the casing, or removing the existing installation body, and then attaching a new installation body inserted into the fluid pipe to the casing. When attaching the installation body to the casing in such an uninterrupted flow state, a fixing device is known that allows the installation body to be attached to the casing even if the gap between the casing and the installation body is narrow.

For example, the fixing device in Patent Document 1 is mainly composed of a fixing member having a long hole extending in the radial direction of the housing and a bolt (rod) extending from the installation body, and the rod is inserted into the long hole of the fixing member. This allows the installation body to be fixed to the housing by inserting the installation body into the housing from above, moving the fixing member in the outer diameter direction, and inserting it into a groove of the housing that is open in the inner diameter direction.

Patent No. 6556502 (pages 6-8, Figure 11)

In the fixing device of Patent Document 1, by inserting the installation body into the housing, even if the gap between the installation body and the housing is narrow and the distance from the opening of the housing to the fixing member is long, the fixing member can be moved by operating the fixing member using a jig. In addition, after moving the fixing member, the fixing member can be fixed by tightening the bolt. However, because the worker operates the fixing member and bolt from a remote position and the visibility of the fixing device is poor, the fixing member is likely to be insufficiently inserted into the groove and the bolt is not tightened enough, which may cause the fixing member to come out. As a result, there is a risk that the installation body will tilt or come out of the housing without sufficient locking force.

The present invention was made with an eye on these problems, and aims to provide a fixture that can stably fix an installation object by holding the fixing member fully inserted into the groove of the housing.

In order to solve the above problems, the fixing device of the present invention comprises:
A fixture including a fixing member having a long hole extending in a radial direction of a housing that fits a fluid pipe, and a rod extending from an installation body installed in the housing and inserted into the long hole, the fixture fixing the installation body inserted into the housing from above by inserting the fixing member into a groove provided on an inner periphery of the housing,
The device further includes a locking body that is movable up and down while being guided by the rod,
The upper surface of the fixing member is formed with a recess on the inner diameter side of the long hole into which the locking body falls.
According to this feature, by inserting the fixing member into the groove of the housing, the locking body falls into the recess of the fixing member, so that even if the fixing member tries to move in the direction of removal, it is restricted by the locking body and the rod body, so that the movement in the backward direction can be restricted. In addition, positioning is possible. As a result, even when working in an environment with poor visibility or when the gap between the housing and the installation body is narrow, the fixing member can be kept in a state where it is fully inserted into the groove of the housing.

The recess is formed so that the locking body falls at a fixed position of the fixing member.
According to this feature, it is possible to shorten the movement allowance required for moving the fixing member toward the groove of the housing in order to drop the engaging body into the recess.

The rod is characterized in that it is a bolt that can be screwed into the installation body.
According to this feature, the axial movement of the locking body can be restricted by tightening the bolt, so that the locking piece can be prevented from moving in the direction of coming out of the recess.

The height dimension of the locking body and the depth dimension of the recess are formed to be substantially the same.
According to this feature, the bolt can be tightened until the head of the bolt comes into contact with the locking body, so that the movement of the locking piece can be restricted reliably. Also, since the axial dimensions of the rod and the locking body are shortened, the stress when a load is applied to the rod or the locking body can be reduced.

The locking body is characterized in that it is a round washer.
According to this feature, even if the locking body rotates in the circumferential direction when the fixing member is inserted into the groove of the housing, the fixing member can be dropped into the recess.

The recess has an inner peripheral surface facing the inner diameter side of the long hole and conforming to the outer peripheral surface of the circular washer.
According to this feature, it is easy to distribute the force acting when the inner peripheral surface of the recess comes into contact with the round washer.

1 is a partial front cross-sectional view showing a state in which a fluid pipe cutting device is installed in a housing attached to an existing fluid pipe in an embodiment. FIG. FIG. 2 is a partial side cross-sectional view taken along the line A in FIG. 1 . FIG. 13 is a partial front cross-sectional view showing the state in which the valve is installed in the housing by the insertion device. FIG. 2 is a plan view of a valve installed in a housing. FIG. 11 is a perspective view showing a groove portion formed in an upper portion of a housing. FIG. 10 is a front cross-sectional view showing the state in which the push-in flange is pushed into the existing pipe. FIG. 1A is a plan view showing a state before the fixing member is moved toward the groove, and FIG. 1B is a plan view showing a state after the fixing member has been moved toward the groove. 11A to 11D are partial cross-sectional side views for explaining the insertion of a fixing member.

The following describes the embodiment of the fastener according to the present invention.

The fixing device according to the embodiment will be described with reference to Figs. 1 to 9. In the following description, the upper side of Fig. 3 refers to the upper side of the installation body that is fixed to the housing using the fixing device, and the lower side of the same page refers to the lower side of the same installation body.

As shown in Figures 1 to 4, the fixing device 1 in this embodiment is used to fix a flow control valve 5 (see Figures 3 and 4) as an installation body inserted into an existing fluid pipe 2 as a fluid pipe to a housing 4 that is hermetically attached to the outer periphery of the existing fluid pipe 2.

Here, the existing fluid pipe 2 is, for example, made of ductile cast iron for water supply buried underground, formed in a roughly circular cross section, and coated on its inner circumferential surface with an epoxy resin layer. The fluid pipe according to the present invention may be made of other metals such as cast iron or steel, or made of concrete, polyvinyl chloride, polyethylene or polyolefin. The materials of the housing 4 and the flow control valve 5 may also conform to the above. Furthermore, the inner circumferential surface of the fluid pipe is not limited to an epoxy resin layer, and may be coated with, for example, mortar, or the inner circumferential surface of the fluid pipe may be coated with an appropriate material by powder coating.

In addition, in this embodiment, the fluid in the fluid pipe is drinking water, but it is not limited to drinking water in this embodiment, and may be, for example, industrial water, agricultural water, sewage, gas, or a gas-liquid mixture of gas and liquid.

As shown in FIG. 1, the housing 4 is a so-called split T-shaped pipe, and is divided into an upper housing part 41 and a lower housing part 42 in the radial direction (vertical direction in this embodiment) of the existing fluid pipe 2.

The upper part 41 of the housing is formed with a neck 41a, a flange 41b connected to the neck 41a, and a housing opening 41d connected to the flange 41b and communicating with the inside of the housing.

On the other hand, the lower housing part 42 has a bowl-shaped housing bottom part 42d, and a discharge hole 42b is formed in the center of the housing bottom part 42d. A valve 49 can be connected to the discharge hole 42b, and as described below, by operating the valve 49, cutting chips generated when cutting the existing fluid pipe 2 can be discharged together with the fluid from the discharge hole 42b.

In this embodiment, the housing is described as having an upper part 41 and a lower part 42, but the direction in which the housing is divided is not limited to being vertical, and may be, for example, horizontal or inclined at a predetermined angle. The number of divisions may be three or more. Similarly, the piping direction of the existing fluid pipe 2 is not limited to being horizontal, and may be, for example, vertical. Furthermore, the cutting direction of the cutter 72, which will be described later, is not limited to being vertical, and may be, for example, horizontal.

As shown in Figures 1 and 2, when the housing 4 is hermetically attached to the existing fluid pipe 2, the fixed flange body 50 is hermetically attached to the top of the flange portion 41b in the housing upper part 41. A plurality of press screws 51 for temporarily fixing the flow control valve 5 inserted into the housing 4 are attached in a hermetically sealed manner at predetermined intervals in the radial direction of the fixed flange body 50.

As shown in FIG. 1, the working valve housing 61 of the working valve 60 is hermetically attached to the top of the fixed flange body 50. The working valve housing 61 is hermetically attached to the working valve body 62, which can be slid horizontally to open and close the space between the housing 4 and the fluid pipe cutting device 70.

The drilling device housing 71 of the fluid pipe cutting device 70 is hermetically attached to the top of the working valve 60. A cutter shaft 73 having a cutter 72 at its tip is hermetically attached to the drilling device housing 71 so as to be movable up and down and rotatable. The cutter 72 and cutter shaft 73 can be rotated from outside the fluid pipe cutting device 70 by a drive device (not shown).

As shown in FIG. 1, the existing fluid pipe 2 is cut by the cutter 72 with the working valve 60 open and without interrupting the flow. The cutting chips generated when the existing fluid pipe 2 is cut are discharged together with the fluid by opening the valve 49.

After the existing fluid pipe 2 is cut, the cutter 72 is raised, the working valve 60 is closed, and the space between the housing 4 and the fluid pipe cutting device 70 is sealed. The fluid in the fluid pipe cutting device 70 is then discharged, and the fluid pipe cutting device 70 is removed from the working valve 60.

Next, as shown in FIG. 3, the insertion device housing 81 of the insertion device 80 is attached in a sealed manner to the top of the working valve 60. An insertion shaft 82 is attached in a sealed manner within the insertion device housing 81 so as to be movable up and down. A holding portion 83 for holding the flow control valve 5 is attached to the lower end of the insertion shaft 82 by a bolt 84. In addition, the male screw of a spindle 85 is screwed into the female screw portion of the insertion shaft 82.

When the handle 86 fixed to the upper end of the spindle 85 is rotated, the insertion shaft 82 is lowered downward relative to the spindle 85, i.e., toward the existing fluid pipe 2. As a result, the flow control valve 5 held by the holding portion 83 is inserted into the housing 4.

Now, the flow control valve 5 will be described. As shown in Figures 3 and 7, the flow control valve 5 comprises a valve lid 5a, a valve seat body 5b, a valve body 5v that moves within the valve seat body 5b, a valve operating shaft 5j that is connected to the top of the valve body 5v, and a valve box 5h that houses a packing that seals the valve operating shaft 5j. The gap between the valve seat body 5b and the housing 4 is sealed by a sealing member 5e. The valve body 5v is moved by rotating the valve operating shaft 5j, and a hole 5f provided in the valve seat body 5b is opened and closed. In this way, the flow control valve 5 can control the flow of the existing fluid pipe 2.

As shown in FIG. 4, four valve cover grooves 5k are formed on the upper surface of the valve cover 5a of the flow control valve 5 at approximately equal intervals in the circumferential direction. The valve cover groove 5k has valve cover groove side walls 5m, 5m and a valve cover groove inner wall 5n, and the radial outer side of the valve cover 5a is open.

Each valve cover groove 5k is provided with a fixing device 1 used to permanently fix the flow control valve 5 to the housing 4. The fixing device 1 is composed of a fixing member 7 that is installed between the groove 41c of the housing 4 and the valve cover 5a of the flow control valve 5, which will be described later, two bolts 9, 9 as rods that movably attach the fixing member 7 along the valve cover groove 5k, and two round washers 10, 10 as locking bodies that are inserted through the body 9b of the bolt 9 and positioned between the head 9a of the bolt 9 and the fixing member 7 (see Figure 8).

The fixing members 7 are arranged approximately evenly around the valve box 5h of the valve cover 5a, with two fixing members 7, 7 arranged on the upstream side of the existing fluid pipe 2 in the axial direction so as to sandwich the existing fluid pipe 2, and two fixing members 7, 7 arranged on the downstream side of the existing fluid pipe 2 in the axial direction so as to sandwich the existing fluid pipe 2.

Furthermore, less than four fixing members may be used, or five or more fixing members may be used, and the number may be changed as appropriate. Furthermore, for example, if two fixing members are used, they may be arranged along the axial direction of the existing fluid pipe 2, and the location of the arrangement may also be changed as appropriate.

As shown in FIG. 5, the fixing member 7 is thick in the vertical direction, wide in plan view, and generally rectangular in shape in order to hold the large fluid pressure acting on the valve lid 5a for a long period of time, and is able to disperse the pressure exerted by the fluid in the pipe.

5, the fixing member 7 has two long holes 7c that extend radially of the housing 4 and penetrate vertically, a recess 7d that is continuous with the inner diameter end of the long hole 7c and is recessed into the upper surface 7h of the fixing member 7, and two holes 7e that are disposed between the two recesses 7d, 7d. The outer peripheral surface of the fixing member 7 is an arc-shaped wall surface 7b that is approximately arc-shaped. The radially extending long holes 7c need only include a radial component of the housing 4, that is, the fixing member 7 needs only to extend along a moving direction that includes a radial component relative to the housing 4.

As shown in Figures 8 and 9, the fixing member 7 is attached to the valve cover 5a so as to be movable in the radial direction by screwing the male threaded portion 9c of the bolt 9 inserted through the long hole 7c into the female threaded portion 5q formed in the valve cover groove 5k of the flow control valve 5. The fixing member 7 can be moved in the radial direction by operating an insertion jig (not shown) inserted into the holes 7e, 7e. Furthermore, the fixing member 7 can be fixed at any position within the valve cover groove 5k by tightening the male threaded portion 9c of the bolt 9 into the female threaded portion 5q of the valve cover groove 5k.

5, the recess 7d has a wall surface 7g extending downwardly and generally perpendicular to the upper surface 7h of the fixing member 7, and a bottom surface 7f extending inwardly and generally perpendicular to the lower edge of the wall surface 7g, and is open to the upper side and the inner diameter side. The wall surface 7g is generally arc-shaped, curving from the inner diameter edge of the fixing member 7 toward the longitudinal center of the long hole 7c, and is formed into a curved surface that can come into face contact with the outer peripheral surface 10a of the annular round washer 10 inserted into the bolt 9. The vertical depth dimension L1 of the recess 7d is generally the same as the vertical thickness dimension L2 of the round washer 10.

As shown in FIG. 6, a groove 41c into which the fixing member 7 is inserted and fixed is formed at the end of the housing opening 41d in the housing upper part 41, aligned with the valve cover groove 5k of the flow control valve 5. The groove 41c is open on the radially inner side, and the open surface faces the valve cover groove 5k. The width and height dimensions of the groove 41c are formed to be approximately the same as or slightly larger than the width and height dimensions of the fixing member 7 so that the fixing member 7 can be stored therein.

As shown in FIG. 8(a), the bolt 9 is fastened to the flow control valve 5 when the fixing member 7 is close to the valve cover groove inner wall 5n of the valve cover groove 5k, and the arc-shaped wall surface 7b forming the outer peripheral surface of the fixing member 7 does not protrude from the valve cover 5a to the outer diameter side, so that the fixing member 7 can easily insert the flow control valve 5 into the housing 4 without interfering with the housing 4. In the state shown in FIG. 8(a), the round washer 10 inserted into the bolt 9 is placed on the upper surface 7h of the fixing member 7. In addition, when the bolt 9 is loosened from the flow control valve 5, the fixing member 7 can freely move in the radial direction along the valve cover groove side wall 5m. The dimensions of the fixing member 7 and the valve cover groove 5k are adjusted so that they come into face contact. The dimensions of the fixing member 7 and the groove 41c are also adjusted so that they come into face contact.

Next, the process of installing the flow control valve 5 in the housing 4 will be described in order. First, as shown in FIG. 3, the flow control valve 5 is inserted into the housing 4, and then the cap screw 51 provided on the fixing flange main body 50 is screwed in, and the valve cover inclined surface 5c (see FIG. 7) formed on the outer periphery of the valve cover 5a of the flow control valve 5 is engaged by the cap screw 51, thereby temporarily fixing the flow control valve 5 to the housing 4.

The fluid in the insertion device 80 is then discharged, the insertion device housing 81 is removed from the operating valve 60, and the holding portion 83 is then removed from the flow control valve 5.

As shown in FIG. 7, after the insertion device 80 is removed from the working valve 60, the annular push-in flange 20 surrounding the upper end of the flow control valve 5 is attached to the working valve housing 61 by a plurality of fixing bolts 20b. At this time, the annular protrusion 20a protruding toward the existing fluid pipe 2 at the inner diameter side end of the push-in flange 20 pushes the protruding portion 5p protruding laterally from the upper part of the flow control valve 5 toward the existing fluid pipe 2. As a result, the flow control valve 5 is pushed further toward the existing fluid pipe 2 side than the temporary fixing position against the fluid pressure. Therefore, immediately after temporary fixing, the ceiling surface of the groove portion 41c and the upper surface 7h of the fixing member 7 are arranged in approximately the same straight line, but by attaching the push-in flange 20, a gap S is formed between the ceiling surface of the groove portion 41c and the upper surface 7h of the fixing member 7 (see FIG. 9(a)).

Next, as shown in FIG. 8(a), an insertion jig (not shown) inserted into holes 7e, 7e of the fixing member 7 is operated to move it in the outer diameter direction, and the fixing member 7 is inserted into the groove 41c formed in the upper part of the housing 41 (see FIG. 8(b) and FIG. 9). At this time, the bolt 9 can be loosened slightly to facilitate the movement of the fixing member 7. Note that the insertion jig is not limited to being inserted into the hole 7e, and may be operated to abut against the inner peripheral surface of the fixing member 7 to push the fixing member 7 in the outer diameter direction, and the method of use may be changed as appropriate.

Incidentally, the inside of the working valve housing 61 contains the valve box 5h and the push-in flange 20, so it is necessary to operate and see the insertion tool through a working hole (not shown) provided in the push-in flange 20. However, not only is the space required for work narrow, but it is also often dark, making visibility poor.

However, with the fastener 1 of this embodiment, as shown in Figures 8(b) and 9(b), when the outer diameter side of the fastener 7 is inserted up to the fixed position in the groove 41c, the round washer 10 placed on the upper surface 7h of the fastener 7 falls into the recess 7d while being guided by the body 9b of the bolt 9. As a result, even if the fastener 7 is again moved toward the inner diameter side, the outer diameter side wall surface 7g of the recess 7d of the fastener 7 comes into contact with the outer circumferential surface 10a of the round washer 10, preventing the fastener 7 from moving out of the groove 41c. In other words, the fastener 7 is positioned. At this time, it is possible to confirm that the fixing member 7 has been inserted to the fixed position within the groove 41c by listening to the sound made by the round washer 10 dropping from the top surface 7h of the fixing member 7 into the recess 7d, visually confirming that the round washer 10 has separated from the head 9a of the bolt 9, and visually confirming the gap that appears between the fixing member 7 and the valve cover groove inner wall 5n when the fixing member 7 moves into the groove 41c.

In addition, since the position where the round washer 10 falls into the recess 7d is the fixed position of the fixing member 7, the movement allowance can be kept to a minimum without excessively moving the fixing member 7 toward the groove portion 41c.

In addition, the gap S formed between the ceiling surface of the groove 41c and the upper surface 7h of the fixing member 7 prevents the fixing member 7 from sliding against the ceiling surface of the groove 41c, avoiding damage. Furthermore, the fixing member 7 is guided along the valve cover groove side wall 5m. This allows the fixing member 7 to be easily inserted into the groove 41c. Note that since the inner circumferential surface of the long hole 7c of the fixing member 7 is guided by the body 9b of the bolt 9, the valve cover groove 5k may be omitted.

To confirm that the fixing member 7 is fully inserted into the groove portion 41c, a confirmation gauge may be inserted between the recess 7d and the fixing member 7 to confirm that the fixing member 7 is fully inserted.

Next, as shown in FIG. 9(c), the round washer 10 falls from the underside of the head of the bolt 9 into the recess 7d, forming a gap P between the underside of the head 9a of the bolt 9 and the upper surface of the round washer 10, so the bolt 9 is tightened against the valve cover 5a to secure it. During this time, the fixing member 7 is fixed in the fixed position, improving safety during work.

In addition, the vertical thickness dimension L2 of the round washer 10 and the vertical depth dimension L1 of the recess 7d are approximately the same, so the bolt 9 can be tightened until the head 9a of the bolt 9 comes into contact with the round washer 10. Therefore, when an external force acts on the fixing member 7, the round washer 10 is prevented from moving in the axial direction of the body 9b of the bolt 9 and climbing up onto the upper surface 7, and the round washer 10 can be reliably prevented from slipping out of the recess 7d. In addition, the axial dimensions of the bolt 9 and the round washer 10 are shortened, so that the stress when a load acts on the bolt 9 or the round washer 10 can be reduced.

Next, the temporary fixation state is released by loosening the pressure screw 51 (see Figure 7). Here, when removing the pressure screw 51, the pressure on the pressure screw 51 is reduced or no fluid pressure is applied because the press flange 20 has already pressed against the fluid pressure. In particular, the annular protrusion 20a and the protruding portion 5p are in face-to-face contact and pressing, so the valve is pressed evenly without being biased. This prevents the problem of a large load being placed on the back and forth movement of the screw due to fluid pressure when operating the pressure screw 51, and makes the removal work easy.

Then, the push-in flange 20, the fixed flange body 50, and the working valve 60 are removed. In this way, the fixed flange body 50 and the multiple pressure screws 51 provided on the fixed flange body 50 are left in the housing 4, and not only can the structure of the installation body be simplified without deterioration over time, but the removed fixed flange body 50 and the multiple pressure screws 51 can be attached to another housing and reused. This releases the pressure from the push-in flange 20, so that the fixed member 7 and the groove 41c receive the fluid pressure from below on the flow control valve 5, and as shown in FIG. 9(d), the upper surface 7h of the fixed member 7 comes into contact with the upper end surface of the groove 41c, and the flow control valve 5 is finally fixed to the housing 4.

At this time, although an impact occurs due to the fluid pressure, the movement of the fixing member 7 is restricted so that it does not come out.

In this way, by attaching the fixing member 7 so that it straddles the valve cover 5a and the groove portion 41c, the fixing member 7 is able to hold the fluid pressure applied to the valve cover 5a. In addition, the side wall of the fixing member 7 that moves within the valve cover groove portion 5k engages with the inner wall 41e of the groove portion 41c (see Figure 6), so the circumferential movement of the flow control valve 5 can also be restricted.

In addition, two fixing members 7 are arranged on each of the upstream and downstream sides of the existing fluid pipe 2 in the pipe axis direction, sandwiching the existing fluid pipe 2. This makes it easier to disperse external forces such as fluid pressure and earthquake shocks, and therefore easier to maintain the fixed state, compared to a configuration in which one fixing member is arranged on each of the upstream and downstream sides along the pipe axis direction.

Finally, the top cover (not shown) is attached to the flange portion 41b with bolts and nuts, completing the installation process of the flow control valve 5.

In this way, the fixing device 1 includes a fixing member 7 having elongated holes 7c, 7c extending in the radial direction of the housing 4 that fits the existing fluid pipe 2, and bolts 9, 9 extending from the flow control valve 5 installed in the housing 4 and inserted into the elongated holes 7c. The fixing device 1 fixes the flow control valve 5 inserted into the housing 4 from above by inserting the fixing member 7 into the groove 41c provided on the inner circumference of the housing 4. The fixing device 1 further includes a round washer 10 that can move up and down guided by the bolt 9. Since the upper surface 7h of the fixing member 7 has a recess 7d on the inner diameter side of the elongated hole 7c into which the round washer 10 falls, by inserting the fixing member 7 into the groove 41c of the housing 4, the round washer 10 falls into the recess 7d of the fixing member 7. Therefore, even if the fixing member 7 tries to move in the direction of removal, it is restricted by the round washer 10 and the bolt 9, and therefore movement in the backward direction can be restricted. In addition, positioning is possible. As a result, even when working in a gap with poor visibility, the fixing member 7 can be kept fully inserted into the groove 41c of the housing 4.

In addition, the recess 7d is formed so that the round washer 10 falls at the fixed position of the fixing member 7, so that the movement allowance required to move the fixing member 7 toward the groove 41c of the housing 4 in order to drop the round washer 10 into the recess 7d can be shortened.

In addition, since the bolt 9 can be screwed into the flow control valve 5, the axial movement of the round washer 10 can be restricted by tightening the bolt 9, thereby preventing the round washer 10 from moving out of the recess 7d.

In addition, because the thickness dimension L2 of the round washer 10 and the depth dimension L1 of the recess 7d are approximately the same, the bolt 9 can be tightened until the head of the bolt comes into contact with the round washer 10, so the movement of the round washer 10 can be reliably restricted. In addition, because the axial dimensions of the bolt 9 and the round washer 10 are shortened, the stress when a load acts on the bolt 9 or the round washer 10 can be reduced.

In addition, because the round washer 10 is a round washer that is approximately circular in plan view, even if the round washer 10 rotates circumferentially along the body 9b of the bolt 9 when inserting the fixing member 7 into the groove 41c of the housing 4, it can be dropped reliably into the recess 7d.

In addition, the round washer 10 is a round washer, and the recess 7d faces the inner diameter side of the long hole 7c and has an inner surface that fits along the outer peripheral surface of the round washer, making it easy to distribute the force that acts when the inner peripheral surface of the recess 7d comes into contact with the round washer.

Although the embodiments of the present invention have been described above with reference to the drawings, the specific configuration is not limited to these embodiments, and the present invention also includes modifications and additions that do not deviate from the gist of the present invention.

For example, in the above embodiment, the explanation was given including the cutting process for cutting the existing fluid pipe, but the fixing device of the present invention is not limited to this, and may be a device for attaching an installation body such as a valve device to a housing that is already installed in an existing fluid pipe.

In the above embodiment, the rod is described as being a bolt 9, but this is not limited thereto and may be, for example, a pin fixed to the valve cover.

In the above embodiment, the locking piece is described as being a round washer 10, but this is not limited to this and may be any type of washer other than a round washer, may be rectangular, or may be modified as appropriate.

In the above embodiment, the fixing device 1 is described as being composed of the fixing member 7, the bolt 9, and the round washer 10, but this is not limited thereto, and the fixing device 1 may be composed of the fixing member 7 and a pin having a head that can be engaged with the long hole. Even with this configuration, by arranging the pin so that it can move axially relative to the valve cover, the fixing member moves to the fixed position and is guided by the body of the pin, while the head of the pin falls into the recess, thereby positioning the fixing member and preventing it from coming loose.

In the above embodiment, the groove 41c into which the fixing member 7 is inserted has an inner wall 41e, which is shaped to restrict the circumferential movement of the housing 4 and the flow control valve 5, but this is not limiting and the groove may be configured as a circumferential groove. By making the groove a circumferential groove without an inner wall 41e, the fixing member 7 can be inserted more easily, which in turn shortens the work time. The housing recess of the present invention does not need to be a circumferential groove with a U-shaped cross section, and may be a groove with an inverted L-shaped cross section as long as it can hold the fixing member 7 so that it does not come off the housing 4.

In addition, in the above embodiment and drawings, the fixing member 7 is moved in a substantially horizontal direction toward the groove portion 41c, but this is not limited thereto. For example, the lower surface of the groove portion 41c may be a tapered surface that tapers downward, and the fixing member 7 may be moved in the outer diameter direction downward and moved into the groove portion 41c and fixed therein.

In addition, in the above embodiment, the female screw portion 56 and the pressure screw 51 constituting the temporary fixing means are provided on the fixed flange body 50, which is an intermediate member, and the push-in flange 20 is attached to the fixed flange body 50, but the temporary fixing means may be provided on the housing and the pressing means may be attached to the top of the housing. In this case, the pressing release process can be omitted, making installation easier.

The flow control valve 5 may be a flow control valve with an anti-rust ring, or a valve such as a sluice valve, plug, or butterfly valve, or a pipe connection member. Furthermore, a cylindrical cutter was used for cutting, but a wire saw or cutting tool may also be used.

The working hole may have a through-hole for inserting the insertion tool, and may be shaped like a partially open notch.

The push-in flange is not limited to being annular, but may be divided circumferentially as long as it is attached to the operating valve 60 and can press against the installation body.

1 Fixing device 2 Existing fluid pipe 4 Housing 5 Flow control valve 5a Valve cover 5k Valve cover groove 5m Valve cover groove side wall 5n Valve cover groove inner wall 7 Fixing member 7b Arc-shaped wall surface 7c Long hole 7d Recess 7e Hole 7f Bottom surface 7g Wall surface 7h Top surface 9 Bolt (rod)
10 Circular washer (locking body)
10a Outer circumferential surface 20 Push-in flange 41 Housing upper portion 50 Fixed flange body 60 Working valve 70 Fluid pipe cutting device 80 Insertion device L1 Depth dimension L2 Height dimension

Claims (6)

A fixture including a fixing member having a long hole extending in a radial direction of a neck of a housing forming a split T-shaped pipe for fitting a fluid pipe therearound, and a rod extending from an installation body installed in the housing and inserted into the long hole, the fixture fixing the installation body inserted into the housing from above by inserting the fixing member into a groove provided on an inner periphery of the housing,
The device further includes a locking body that is movable up and down while being guided by the rod,
A fixture characterized in that a recess into which the engaging body falls is formed on the inner diameter side of the long hole on the upper surface of the fixing member. The fixing device according to claim 1, characterized in that the recess is formed so that the locking body falls at the fixing position of the fixing member. The fixing device according to claim 1 or 2, characterized in that the rod is a bolt that can be screwed into the installation body. The fixture according to any one of claims 1 to 3, characterized in that the height dimension of the locking body and the depth dimension of the recess are formed to be approximately the same. The fastener according to any one of claims 1 to 4, characterized in that the locking body is a round washer. 6. The fastener according to claim 5 , wherein the recess has an inner peripheral surface that faces an inner diameter side of the long hole and conforms to an outer peripheral surface of the round washer.

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