JP7308515B2 - Installation Jig for Flange Reinforcement and Installation Method for Flange Reinforcement - Google Patents

Description

The present invention provides a jig for installing a flange reinforcing tool and a method for installing a flange reinforcing tool, which includes a clamping member that clamps a pair of opposing flange portions in the vertical direction, and a fastening mechanism that clamps the clamping member along the vertical direction. Regarding.

Conventionally, a valve case (repair valve case) is composed of a short pipe and a valve box, and a first protrusion (flange) protruding radially outward from the end of the short pipe and the end of the valve box radially outward. There is known a flange reinforcing tool that is attached to a divided portion in which a second projecting portion (flange portion) projecting outward is joined with bolts (see, for example, Patent Document 1).

The flange reinforcing tool described in Patent Document 1 includes a clamping member that clamps the first projecting portion and the second projecting portion, and a fastening mechanism that pulls and fixes the clamping member in the joining direction (vertical direction) of the divided portion. These clamping members have two pressing portions for pressing regions on both sides along the circumferential direction of the head of the bolt on the outer surface of the first projecting portion. With this configuration, even if the strength of the bolt deteriorates due to aging of the repair valve, the flange reinforcement will reinforce the area around the bolt in the split portion, preventing water leakage from the gap in the split portion. It is possible. In particular, the flange reinforcing tool described in Patent Document 1 presses the areas on both sides of the head of the bolt, so it can be installed even when the space in the radially inner direction of the bolt is narrow, such as in a repair valve case. It is possible to do so, and it is highly convenient.

JP 2016-23659 A

By the way, there is a case where the gap between the side wall of the manhole housing the repair valve case having the divided portion and the repair valve case is narrow. In this case, after temporarily attaching the clamping member to the divided portion by inserting the flange reinforcing tool into the space, the operation of operating the fastening mechanism to permanently fix the clamping member to the divided portion must be performed in a limited space. becomes. As a result, the clamping member cannot be held sufficiently, and when the fastening mechanism is operated, the clamping member may rotate, causing the pressing position of the pressing portion to deviate from the desired position. There was a risk that the reinforcement would fall.

Therefore, there is a demand for an installation jig for the flange reinforcement and a method for installing the flange reinforcement with high work efficiency.

An installation jig for a flange reinforcing tool according to the present invention is characterized by comprising a clamping member that clamps a pair of opposing flange portions in the vertical direction, and a fastening mechanism that clamps the clamping member along the vertical direction. When the clamping member is fastened along the vertical direction by the fastening mechanism and installed on the pair of flange portions, the clamping member is pressed toward the flange portion to remove the clamping member. a holding mechanism for holding the holding member by contacting an outer surface of the holding member on the side opposite to the side where the holding member holds the flange portion; a rod-shaped member extending along a direction and operable so that the holding mechanism presses the clamping member toward the flange.

The installation jig of this configuration includes a holding mechanism that holds the holding member by contacting the outer surface of the holding member on the side opposite to the side that holds the flange portion, and a rod-shaped member that extends vertically from the holding mechanism. and Accordingly, when the flange reinforcing member is attached to the flange portion, the holding mechanism presses the holding member by operating the bar member while the holding mechanism is in contact with the holding member. As a result, when the fastening mechanism is operated to permanently fix the clamping member to the flange portion, the clamping member can be prevented from rotating.

In addition, since the installation jig is composed of a holding mechanism and a rod-shaped member, even if the gap between the side wall of the manhole and the repair valve case is narrow, the rod-shaped member can be gripped as long as there is enough space for the rod-shaped member to pass through. The installation jig can be inserted into the gap in this state. As a result, the flange reinforcing member can be installed with good working efficiency without being affected by the surrounding environment of the flange portion.

Another characteristic configuration is that the holding mechanism has a contact locking portion that contacts and is locked to the upper surface of the holding member.

As in the holding mechanism of this configuration, if it has a contact locking portion that contacts the upper surface of the clamping member, it is possible to bring the installation jig into contact with the clamping member from above, thereby improving work efficiency. can be further increased.

Another characteristic configuration is that the holding mechanism is provided with a spout capable of spouting fluid for cleaning the flange portion .

If the ejection port is provided in the holding mechanism as in this configuration, it is possible to clean the mud by blowing off mud or the like adhering to the flange portion with the fluid. Since the ejection port is provided in the holding mechanism, work efficiency is high.

Another characteristic configuration is that a cutter member is provided at the end of the holding mechanism opposite to the rod member.

If a cutter member is provided on the installation jig as in this configuration, even if a vinyl cover (poly sleeve) is provided on the flange, it is possible to install the flange reinforcing device by cutting it with the cutter member. Become. Since the cutter member is provided in the holding mechanism, work efficiency is high.

According to another characteristic configuration, the holding mechanism has an insertion projection that is inserted into a gap between the clamping member and the flange portion, and the insertion projection has an outer movement of the rod-shaped member to close the gap. The point is that a hinge capable of canceling the inserted state with respect to the is provided.

In this configuration, since it is possible to suspend the clamping member by means of the insertion projection, the flange reinforcing tool held by the installation jig is attached to the flange, and the fastening mechanism is operated while preventing the clamping member from rotating by manipulating the rod-shaped member. It becomes possible to conclude. Since the inserted state of the insertion projection is released by moving the rod-like member outward, the installation jig can be removed. Therefore, work efficiency can be further improved.

A feature of the installation method of the flange reinforcing tool according to the present invention is that the first clamping member that clamps the first flange portion located on the lower side and the second clamping member that clamps the second flange portion located on the upper side A first step of connecting the holding member with a connecting bolt, bringing the first pressing portion located above the first holding member into contact with the outer surface of the first flange portion, and the second a second step of abutting the second pressing portion located above the holding member against the outer surface of the second flange portion; a third step in which the holding mechanism presses the first clamping member toward the first flange portion by operating; A fourth step of fixing the first clamping member to the first flange portion by tightening a mechanism; and a fifth step of fixing the holding member to the second flange portion.

In this method, two flange portions can be simultaneously reinforced by the first clamping member and the second clamping member. Further, in the third step and the fourth step, the holding mechanism presses the holding member toward the first flange portion by operating the rod-like member while the holding mechanism is in contact with the holding member. As a result, when the first fastening mechanism is operated to fix the first holding member to the first flange portion, the first holding member can be prevented from rotating. Furthermore, since the installation jig is composed of the holding mechanism and the rod-like member, even if the gap between the side wall of the manhole and the repair valve case is narrow, the installation jig can be inserted into the gap while gripping the rod-like member. be able to. As a result, the flange reinforcing member can be installed with good working efficiency without being affected by the surrounding environment of the flange portion.

Another feature is that in the fourth step, the first fastening mechanism is tightened in a state in which the rod-shaped member is tilted so as to abut on the side wall of the manhole.

In this method, when the rod-like member is tilted so as to abut on the side wall of the manhole in the fourth step, the holding mechanism presses the holding member toward the flange portion by the principle of leverage. As a result, the posture of the installation jig is stabilized when the tightening work of the fastening mechanism is performed, so that work efficiency can be further improved.

It is a perspective view of a tubular member. It is a top view of a division part. 4 is an enlarged vertical cross-sectional view of a tubular member; FIG. FIG. 4 is a diagram showing a schematic configuration of an inserted portion of the upper clamping member; FIG. 4 is a diagram showing a schematic configuration of an insertion portion of the upper clamping member; FIG. 5 is a diagram showing a schematic configuration of an inserted portion of the lower holding member; FIG. 4 is a diagram showing a schematic configuration of an insertion portion of a lower holding member; It is a side view which shows the state which attached the flange reinforcing tool to the flange part within the manhole. It is a top view which shows the state which attached the flange reinforcing tool to the flange part within the manhole. FIG. 10 is a view taken along line XX of FIG. 9; FIG. 2 is an overall perspective view of an installation jig for a flange reinforcing device; It is a partial perspective view of the installation jig of a flange reinforcement. FIG. 4 is a diagram showing first and second steps of a method for installing a flange reinforcing member in a manhole; It is a figure which shows the 3rd process of the installation method of a flange reinforcement in a manhole. FIG. 10 is a diagram showing fourth to fifth steps of a method for installing a flange reinforcement in a manhole; 4 is a vertical cross-sectional view of a flange reinforcement according to another embodiment 1. FIG. FIG. 11 is a partial perspective view of an installation jig according to another embodiment 2;

EMBODIMENT OF THE INVENTION Below, embodiment of the installation jig|tool of the flange reinforcement tool which concerns on this invention, and the installation method of a flange reinforcement tool is described based on drawing. However, without being limited to the following embodiments, various modifications are possible without departing from the scope of the invention. In the following description, the direction of gravity is defined as the bottom, and the direction opposite to the direction of gravity is defined as the top.

In this embodiment, a flange reinforcing tool (hereinafter referred to as "reinforcing tool P") is used to reinforce both the flange portions 11a and Ta and both the flange portions Va and 12a, and the valve body V and the short pipe T A case of preventing water leakage from the divided portion 1 by applying a pressing force to the divided portion 1 of the repair valve case X made of cast iron will be described.

1 to 3 show a connection pipe 11 (first tubular member), a short pipe T (second tubular member), a valve body V (third tubular member) and a branch pipe 12 (fourth tubular member). ) and the split 1 between the short pipe T and the valve body V are shown. At one end of the short pipe T, a first split portion 1A to which the second split portion 1B of the valve body V is joined is formed so as to protrude radially outward of the short pipe T. As shown in FIG. A disc-shaped short pipe flange to which a disc-shaped connection flange portion 11a (an example of a second flange portion) projecting radially outward of the connection pipe 11 such as an air valve or a fire hydrant is attached to the other end of the short pipe T. A portion Ta (an example of a second flange portion) is formed so as to protrude from the short pipe T in the radially outer direction. At one end of the valve box V, a second split portion 1B to which the first split portion 1A of the short pipe T is joined is formed so as to protrude radially outward of the valve box V. As shown in FIG. A disk-shaped valve to which a disk-shaped branch flange portion 12a (an example of a first flange portion) projecting radially outward from a branch pipe 12 of a water main (not shown) is attached to the other end of the valve box V. A box flange portion Va (an example of a first flange portion) is formed to extend radially outward of the valve box V. As shown in FIG.

The first divided portion 1A and the second divided portion 1B are formed in a rectangular shape in plan view. An operating portion 10 capable of rotating a ball valve body Vb, which will be described later, is connected to the first divided portion 1A and the second divided portion 1B.

As shown in FIGS. 2 and 3, the second divided portion 1B is provided with a plurality of (four in this embodiment) through holes 3b penetrating in the joining direction (vertical direction) and formed at intervals in the circumferential direction. there is A plurality of holes 3a (four holes in the present embodiment) closed on the side opposite to the joint surface 1b are formed in the first divided portion 1A so as to be spaced apart in the circumferential direction. A female thread 3c is formed on the inner peripheral surface of each hole 3a, and the male thread 4b is screwed into the female thread 3c so that the bolt 4 does not protrude from the first split section 1A. A second split portion 1B is joined. That is, the head 4a of the bolt 4 is exposed on the outer side surface 1a of the second split portion 1B.

As shown in FIG. 1, a connection flange portion 11a of a connection pipe 11 such as an air valve or a fire hydrant and a short pipe flange portion Ta formed at the other end of the short pipe T are connected by a bolt 41a and a nut 41b. . A branch flange portion 12a of a branch pipe 12 such as a water pipe and a valve box flange portion Va formed at the other end of the valve box V are connected by bolts 42a and nuts 42b.

As shown in FIG. 3, a ball valve body Vb is accommodated inside the valve body V, and the ball valve body Vb is rotated by the opening and closing operation of the operation unit 10 to switch between communication and non-communication of the flow path. be done.

1 and 3, the connection flange portion 11a, the short pipe flange portion Ta, the first split portion 1A, the second split portion 1B, the valve body flange portion Va, and the branch flange portion 12a shown in FIGS. The surfaces facing each other in the joining direction (hereinafter sometimes referred to as the "vertical direction") when they are joined are the joining surface 1b, and the outer surface parallel to the joining surface 1b and perpendicular to the vertical direction is the outer surface 1a. described as. In addition, the connection flange portion 11a, the short pipe flange portion Ta, the valve body flange portion Va, and the branch flange portion 12a will be described as an outer peripheral surface 1c.

(Basic configuration of flange reinforcement)
As shown in FIG. 8, the reinforcing member P includes an upper clamping member 10A (an example of a second clamping member) and a lower clamping member 10A (an example of a second clamping member) made of cast iron and attached to both the flanges 11a and Ta and to both the flanges Va and 12a. 10B (an example of a first holding member), and a connecting mechanism R that applies a force in the approaching direction to bring the upper holding member 10A and the lower holding member 10B closer to each other. Further, the reinforcing member P includes a spacing member 9 that maintains a spacing between the upper clamping member 10A and the lower clamping member 10B.

As shown in FIGS. 8 to 10, the upper clamping member 10A has two pressing portions that press a region between two nuts 41b adjacent in the circumferential direction on the outer surface 1a of the connection flange portion 11a of the connection pipe 11. A region between the heads of two bolts 41a adjacent to each other in the circumferential direction on the outer surface 1a of the first inserted portion 6 having 6B (an example of a second pressing portion) and the short pipe flange portion Ta of the short pipe T and a first insertion portion 5 having two pressing portions 5C for pressing. In addition, the first insertion portion 5 and the first inserted portion 6 are pulled toward (brought close to) the connection flange portion 11a of the connection pipe 11 and the short pipe flange portion Ta of the short pipe T in the joining direction and fixed by tightening. An upper fastening mechanism Ka (an example of a second fastening mechanism) is provided. The upper fastening mechanism Ka in the present embodiment also serves as the connecting bolt Ra of the connecting mechanism R, which will be described later.

As shown in FIGS. 4 and 10, the first inserted portion 6 is made of a metal member, and includes a square tubular portion 6A and a pressing member extending outward from one of the four sides of the square tubular portion 6A. It is integrally provided with the part 6B. The square tube portion 6A is formed in a bottomed square tube shape having a trapezoidal shape in which the outer surface 6a and the inner surface 6b increase in diameter as they approach the flange portions 11a and Ta when viewed in cross section (when viewed in a cross section perpendicular to the joining direction). It is Further, the pressing portion 6B is formed so as to extend outward from one of the four sides of the outer surface 6a of the rectangular tubular portion 6A in a bifurcated shape.

The rectangular tubular portion 6A is formed so as to protrude radially inward at both end portions along the circumferential direction of the inner surfaces (outer surfaces 6a) of the flange portions 11a and Ta facing the outer peripheral surfaces 1c of the flange portions 11a and Ta. It has a contact portion 6h that can be contacted. When the first insertion portion 5 and the first inserted portion 6 are fixed by the upper fastening mechanism Ka, the contact portion 6h contacts both the flange portions 11a and Ta, thereby preventing rotation of the upper clamping member 10A. .

Inside the square tube portion 6A, a tubular inner space 6c is formed along the joining direction of both the flange portions 11a and Ta to receive the square tube portion 5A of the first insertion portion 5, which will be described later. The tubular inner space 6c is formed in a trapezoidal cross-sectional view, and is formed slightly larger than the outer diameter of the rectangular tubular portion 5A of the first insertion portion 5 having a trapezoidal cross section. Therefore, the cross-sectional shape perpendicular to the joining direction between the outer surface 5a of the square tubular portion 5A of the first insertion portion 5 and the inner surface 6b of the square tubular portion 6A of the first inserted portion 6 is the first insertion portion 5. When inserted into the inserted portion 6, it is slidable in the insertion direction (longitudinal direction of the cylindrical internal space 6c), but relative to the insertion direction (around the axis along the longitudinal direction of the cylindrical internal space 6c). It is formed so that it cannot rotate.

Further, in the tubular inner space 6c, an opening is formed on the side opposite to the side on which the pressing portion 6B is formed. On the side of the cylindrical inner space 6c where the pressing portion 6B is formed, an insertion hole 6d into which a male threaded portion Ra2 of a connecting bolt Ra of a connecting mechanism R, which will be described later, can be inserted without being screwed together, extends through the bottom portion of the square tube portion 5A. An opening is formed in a penetrating state.

The pressing portion 6B is formed in a bifurcated shape with the same arm length in a plan view, and is formed in a tapered shape that becomes farther away from the insertion hole 6d toward the distal end side. Further, the tip portion of the pressing portion 6B on the opening side of the cylindrical inner space 6c is formed as a flat pressing surface 6e.

As shown in FIGS. 5 and 10, the first insertion portion 5 is made of a metal member, and includes a square tubular portion 5A and a flange extending outward along the entire circumference from an outer surface 5a of the square tubular portion 5A. A shaped portion 5B and a pressing portion 5C extending further outward from one of the four sides of the flange portion 5B are integrally provided. The square tube portion 5A has a trapezoidal shape in which the outer surface 5a expands in diameter as it approaches the flange portions 11a and Ta, and the inner surface 5b is formed in the shape of a circular bottomed square tube.

The inner surface 5b of the square tubular portion 5A is adapted to allow insertion of a male threaded portion Ra2 of a connecting bolt Ra of a connecting mechanism R, which will be described later, without being screwed therewith. The brim portion 5B is formed in a trapezoidal shape when viewed in a cross section perpendicular to the joining direction, and the rectangular tubular portion 5A extends from the central portion. The pressing portion 5C is bifurcated with arms having the same length in plan view. Further, the tip portion of the pressing portion 5C on the side of the rectangular tubular portion 5A is formed as a flat pressing surface 5e.

As shown in FIG. 10 , the upper fastening mechanism Ka has a connecting bolt Ra, a proximity nut 91 and a position adjusting nut 92 . With the pressing portion 6B of the first inserted portion 6 in contact with the outer surface 1a of the connection flange portion 11a of the connection pipe 11, the position adjusting nut 92 in contact with the outer surface 5a of the first insertion portion 5 is attached to the connecting bolt Ra. By screwing into the male threaded portion Ra2, the pressing portion 5C of the first insertion portion 5 contacts the outer surface 1a of the short pipe flange portion Ta of the short pipe T, and the first inserted portion 6 of the first insertion portion 5 is adjusted relative to Then, by tightening the proximity nut 91, the first insertion portion 5 and the first inserted portion 6 are pulled toward the joining direction of both the flange portions 11a and Ta, and are fastened and fixed. As a result, the upper fastening mechanism Ka functions, and the pressing portion 6B of the first inserted portion 6 presses the connection flange portion 11a of the connection pipe 11 downward to prevent water leakage from the joint surface 1b of the split portion 1. The connecting mechanism R functions to do this.

As shown in FIGS. 8 and 10, the lower clamping member 10B includes two nuts 42b on the outer surface 1a of the valve body flange portion Va of the valve body V for pressing the region between two nuts 42b adjacent in the circumferential direction. Between the second inserted portion 7 having a pressing portion 7B (an example of a first pressing portion) and the heads of two bolts 42a adjacent in the circumferential direction on the outer surface 1a of the branch flange portion 12a of the branch pipe 12 and a second insertion portion 8 having two pressing portions 8C for pressing the region. In addition, the second inserted portion 7 and the second inserted portion 8 are drawn toward (brought closer to) the joining direction of the valve body flange portion Va of the valve body V and the branch flange portion 12a of the branch pipe 12, and are tightened and fixed. A lower fastening mechanism Kb (an example of a first fastening mechanism) is provided. The connecting bolt Ra of the connecting mechanism R, which will be described later, is also used as the lower fastening mechanism Kb in the present embodiment.

As shown in FIGS. 6 and 10, the second inserted portion 7 is made of a metal member, and integrally includes a rectangular tubular portion 7A and a pressing portion 7B. The square tube portion 7A is formed in a bottomed square tube shape having a trapezoidal shape in which the outer surface 7a and the inner surface 7b increase in diameter as they approach the flange portions Va and 12a when viewed in a cross section (a cross section perpendicular to the joining direction). It is Further, the pressing portion 7B is formed so as to extend outward from one of the four sides of the outer surface 7a of the rectangular tubular portion 7A in a bifurcated shape.

The rectangular tubular portion 7A is formed so as to protrude radially inward at both end portions along the circumferential direction of the inner surface (outer surface 7a) facing the outer peripheral surface 1c of both the flange portions Va and 12a. It has a pair of contactable contact portions 7h. When the second insertion part 7 and the second insertion part 8 are fixed by the lower fastening mechanism Kb, the contact part 7h contacts both the flange parts Va and 12a, thereby preventing the rotation of the lower clamping member 10B. be done.

Inside the square tube portion 7A, a tubular inner space 7c is formed along the joining direction of both the flange portions Va and 12a to receive the square tube portion 8A of the second insertion portion 8, which will be described later. The cylindrical inner space 7c is formed in a trapezoidal shape in a cross-sectional view, and is formed slightly larger than the outer diameter of the trapezoidal square tube portion 8A. Therefore, the cross-sectional shape perpendicular to the joining direction between the outer surface 8a of the square tube portion 8A of the second insertion portion 8 and the inner surface 7b of the square tube portion 7A of the second inserted portion 7 is the second insertion portion 8. When inserted into the inserted portion 7, it is slidable in the insertion direction (longitudinal direction of the cylindrical internal space 7c), but relative to the insertion direction (around the axis along the longitudinal direction of the cylindrical internal space 7c). It is formed so that it cannot rotate.

Further, in the tubular inner space 7c, an opening is formed on the side opposite to the side on which the pressing portion 7B is formed. On the side of the tubular inner space 7c on which the pressing portion 7B is formed, an insertion hole 7d into which the male threaded portion Ra2 of the connecting bolt Ra can be inserted without being screwed therethrough is formed to pass through the bottom portion of the rectangular tubular portion 7A. It is

The pressing portion 7B is formed in a bifurcated shape with the same arm length in a plan view, and is formed in a tapered shape that becomes farther away from the insertion hole 7d toward the distal end side. Further, the tip portion of the pressing portion 7B on the opening side of the cylindrical inner space 7c is formed as a flat pressing surface 7e.

As shown in FIGS. 7 and 10, the second insertion portion 8 is made of a metal member, and includes a square tubular portion 8A and a flange extending outward along the entire circumference from an outer surface 8a of the square tubular portion 8A. A shaped portion 8B and a pressing portion 8C extending further outward from one of the four sides of the brim portion 8B are integrally provided. The square tube portion 8A has a trapezoidal shape in which the outer surface 8a expands in diameter as it approaches the flange portions Va and 12a, and the inner surface 8b is formed in the shape of a circular bottomed square tube.

An inner surface 8b of the rectangular tubular portion 8A is formed with a female threaded portion 8f into which the male threaded portion Ra2 of the connecting bolt Ra can be screwed. The brim portion 8B is formed in a trapezoidal shape when viewed in a cross section perpendicular to the joining direction, and the rectangular tubular portion 8A extends from the central portion. The pressing portion 8C is bifurcated with arms having the same length in plan view. Further, the tip portion of the pressing portion 8C on the side of the rectangular tubular portion 8A is formed as a flat pressing surface 8e.

As shown in FIG. 10 , the lower fastening mechanism Kb has a connecting bolt Ra, a pressing nut 93 and a positioning nut 94 . The male threaded portion Ra2 of the connecting bolt Ra is screwed into the female threaded portion 8f of the inner surface 8b of the rectangular tubular portion 8A of the second insertion portion 8, and the pressing nut 93 presses the outer surface 7a of the second inserted portion 7 by means of the positioning nut 94. The connecting bolt Ra is tightened in the fixed state, and the second inserted portion 7 and the second inserted portion 8 are pulled toward the joining direction of both the flange portions Va and 12a and fastened and fixed. As a result, the lower fastening mechanism Kb functions, and the pressing portion 8C of the second insertion portion 8 presses the branch flange portion 12a of the branch pipe 12 upward to prevent water leakage from the joint surface 1b of the split portion 1. The connection mechanism R for this functions. In addition, as long as the position of the second inserted portion 7 is fixed, it is not limited to the pressing nut 93 and the positioning nut 94, and a welding piece or the like integrated with the connecting bolt Ra may be used.

The connecting mechanism R has a connecting bolt Ra. With the pressing nut 93 positioned by the positioning nut 94, the connecting bolt Ra is tightened to pull the second inserted portion 7 and the second inserted portion 8 toward the joining direction of the two flange portions Va and 12a. Then, by screwing the position adjusting nut 92 of the upper fastening mechanism Ka onto the male threaded portion Ra2 of the connecting bolt Ra and tightening the proximity nut 91, the first insertion portion 5 and the first inserted portion 6 are connected to both the flange portions 11a. , Ta in the joining direction, and fastened and fixed. As a result, the upper clamping member 10A and the lower clamping member 10B move closer to each other and apply a pressing force to the divided portion 1 of the repair valve case X. As shown in FIG. Further, as described above, the upper fastening mechanism Ka is configured by screwing the proximity nut 91 and the position adjustment nut 92 onto the coupling bolt Ra of the coupling mechanism R, and the lower fastening mechanism Kb A pressing nut 93 and a positioning nut 94 are screwed onto the male threaded portion Ra2 of the connecting bolt Ra. That is, the connecting bolt Ra of the connecting mechanism R in the present embodiment is also used as the fastening mechanisms Ka and Kb, and the first insertion portion 5 and the first inserted portion 6 are pulled together about the connecting bolt Ra as an axis. It is possible to draw the second inserted portion 7 and the second inserted portion 8 and to move the holding members 10A and 10B closer to each other.

As shown in FIG. 10 , the spacing member 9 is an elastic member that is locked across the pressing portion 5C of the first insertion portion 5 and the pressing portion 7B of the second inserted portion 7 . When the clamping members 10A and 10B connected by the connecting bolt Ra are mounted, the compressive force of the spacing member 9 causes the position adjustment nut 92 to press the outer surface 5a of the first insertion portion 5 until the position adjustment nut 92 presses the first insertion portion 5a. 5 is pulled, and the second inserted portion 7 is pulled until the pressing nut 93 presses the outer surface 7a of the second inserted portion 7 . As a result, the distance between the pressing portion 5C of the first insertion portion 5 and the pressing portion 6B of the first inserted portion 6 is maintained, and the upper clamping member 10A is arranged so as to face the outer side surfaces 1a of both the flange portions 11a and Ta. can be inserted. Further, the lower clamping member 10B is arranged so as to maintain the distance between the pressing portion 7B of the second inserted portion 7 and the pressing portion 8C of the second insertion portion 8 and to face the outer side surfaces 1a of both the flange portions Va and 12a. can be inserted.

(Basic configuration of installation jig)
11 and 12, an installation jig E for installing the reinforcement P when the gap between the side wall Ma of the manhole M and the repair valve case X is particularly narrow (hereinafter simply referred to as the “installation jig for the reinforcement P”). The basic configuration of the device E” will be described.

The installation jig E is made of metal and holds the lower clamping member 10B by coming into contact with the back surface 7Aa of the lower clamping member 10B (the surface of the outer surface 7a of the rectangular tube portion 7A opposite to the valve body flange portion Va). and a metal bar member 22 extending vertically from the holding mechanism 21 and capable of being operated so that the holding mechanism 21 presses the lower clamping member 10B toward both flange portions Va and 12a. and (see also FIG. 13).

The holding mechanism 21 has a main body portion 21A including a trapezoidal inner surface 21a whose diameter increases toward the valve body flange portion Va so as to follow the trapezoidal shape of the back surface 7Aa of the lower clamping member 10B shown in FIG. there is The body portion 21A includes a back cover portion 21Aa that covers the upper side of the back surface 7Aa of the lower clamping member 10B, and an upper surface 7Ab of the lower clamping member 10B (a surface of the outer surface 7a of the rectangular tubular portion 7A that faces the upper clamping member 10A). A contact locking portion 21Ab that contacts and locks is integrally formed. Further, the holding mechanism 21 is provided with a fluid ejection path 31 including an ejection port 31a capable of ejecting air (an example of fluid). This fluid ejection path 31 is fixed to the side surface of the holding mechanism 21 via the inside of the rod-shaped member 22 . Furthermore, a cutter member 32 is integrally formed with the body portion 21A at the end portion of the holding mechanism 21 opposite to the rod-like member 22 . This cutter member 32 can cut the poly sleeve covering both flange portions Va and 12a. In addition, the back surface covering portion 21Aa, the abutment locking portion 21Ab, and the cutter member 32 may be fixed by bolts, adhesives, or the like as separate members instead of being formed integrally with the main body portion 21A.

The rod-shaped member 22 includes a rod body 22A to which the main body 21A of the holding mechanism 21 is fixed at the distal end by a band, welding, or the like, and a base end of the rod body 22A along a direction perpendicular to the extending direction of the rod body 22A. and a grasping portion 22B that is locked to the portion (end portion opposite to the tip portion). By tilting the rod body 22A so as to contact the side wall Ma of the manhole M while gripping the gripping portion 22B, the holding mechanism 21 presses the lower gripping member 10B toward both the flange portions Va and 12a ( See also Figure 13). As a result, the rotation of the lower holding member 10B can be prevented when the lower fastening mechanism Kb is operated to be tightened.

Next, a method for installing the reinforcing member P using the installation jig E will be described with reference to FIGS. 13 to 16. FIG.

First, as a preliminary preparation, if there is a polysleeve covering the flanges 11a, Ta, Va, and 12a of the repair valve case X, insert the installation jig E between the manhole M and the repair valve case X and hold it. A cutter member 32 formed at the end of mechanism 21 cuts the poly sleeve. Then, the poly sleeve covering the repair valve case X is removed. In addition, when mud or the like adheres to the flange portions 11a, Ta, Va, and 12a of the repair valve case X, air is ejected from the ejection port 31a of the holding mechanism 21 to remove the mud or the like.

As shown in FIG. 13, the externally threaded portion Ra2 of the connecting bolt Ra in which the position adjusting nut 92, pressing nut 93 and positioning nut 94 are screwed is inserted into the internally threaded portion 8f of the second insertion portion 8 of the lower clamping member 10B. They are screwed together and temporarily fixed (first step, see also FIG. 10). In addition, while the pressing nut 93 is pressing the outer surface 7 a of the second inserted portion 7 , the pressing nut 93 is fixed in advance by the positioning nut 94 so that the pressing nut 93 does not move. Then, the upper clamping member 10A is inserted into the male threaded portion Ra2 of the connecting bolt Ra, and the proximity nut 91 is screwed (first step). At the same time, the spacing member 9 is attached across the pressing portion 5C of the first insertion portion 5 and the pressing portion 7B of the second inserted portion 7 . At this time, the proximity nut 91 is set so that the distance between the pressing portion 6B of the first inserted portion 6 and the pressing portion 8C of the second insertion portion 8 is greater than or equal to the distance between the connection flange portion 11a and the branch flange portion 12a. It is spaced apart from the outer surface 6 a of the first inserted portion 6 . Further, the position adjusting nut 92 presses the outer surface 5a of the first insertion portion 5, thereby maintaining the distance between the pressing portion 6B of the first inserted portion 6 and the pressing portion 5C of the first insertion portion 5. The nut 93 presses the outer surface 7a of the second insertion portion 7, thereby maintaining the distance between the pressing portion 7B of the second insertion portion 7 and the pressing portion 8C of the second insertion portion 8. As shown in FIG. In this way, the upper clamping member 10A and the lower clamping member 10B with the connecting mechanism R, the upper fastening mechanism Ka, and the lower fastening mechanism Kb temporarily fixed are attached to the flange portions 11a and Ta and the flange portions Va, respectively. , 12a.

Next, while the pressing portion 7B of the second inserted portion 7 is in contact with the outer surface 1a of the valve body flange portion Va, the pressing portion 6B of the first inserted portion 6 is pressed against the outer surface 1a of the connecting flange portion 11a. Bring them into contact (second step). Further, when the pressing portion 6B of the first inserted portion 6 is brought into contact with the outer side surface 1a of the connection flange portion 11a, the position is adjusted while moving the pressing portion 6B of the first inserted portion 6 up and down. Next, the installation jig E is inserted through the gap between the side wall Ma of the manhole M and both clamping members 10A and 10B so that the contact locking portion 21Ab of the holding mechanism 21 contacts the upper surface 7Ab of the lower clamping member 10B. , the installation jig E is attached to the lower clamping member 10B (third step). Next, the holding mechanism 21 presses the lower clamping member 10B toward the valve body flange Va by tilting the rod body 22A while gripping the gripping portion 22B so as to contact the side wall Ma of the manhole M. (Third step). Next, as shown in FIG. 14, with the rod body 22A in contact with the side wall Ma of the manhole M and with the pressing nut 93 pressing against the outer surface 7a of the second inserted portion 7, the connecting bolt By tightening Ra, the male threaded portion Ra2 of the connecting bolt Ra is screwed into the female threaded portion 8f of the second insertion portion 8, and the second insertion portion 8 is drawn and fixed to the second inserted portion 7 (fourth step, See also Figure 10). At this time, by tightening the head Ra1 of the connecting bolt Ra using a tool such as a ratchet wrench L, the second insertion portion 8 moves upward, and the second insertion portion 8 is placed on the outer surface 1a of the branched flange portion 12a. Since an upward force acts from the pressing portion 8C, the upper clamping member 10A and the lower clamping member 10B move toward each other. As a result, it is possible to prevent water leakage from the joint surface 1b of both the flange portions Va and 12a and prevent water leakage from the joint surface 1b of the divided portion 1. FIG. As described above, in this embodiment, by tightening the head Ra1 of the connecting bolt Ra using a tool that can be operated from above, the function of the connecting mechanism R and the function of the lower fastening mechanism Kb can be performed at the same time. Even when the gap between the repair valve case X and the manhole M accommodating the repair valve case X is small, the manhole M does not need to be demolished, which is efficient. Further, even when the upper clamping member 10A and the lower clamping member 10B are separated from each other, there is no need to change the dimensions of the upper clamping member 10A and the lower clamping member 10B, and only the dimension of the connecting bolt Ra needs to be changed. Good luck. Moreover, when the rod-shaped member 22 is tilted so as to abut on the side wall Ma of the manhole M, the holding mechanism 21 presses the lower clamping member 10B toward the valve body flange Va by the principle of leverage. As a result, when the lower fastening mechanism Kb is tightened, the posture of the installation jig E is stabilized, so that the working efficiency can be further improved.

Next, as shown in FIG. 15, the installation jig E is removed, and the position adjustment nut 92 pressing against the outer surface 5a of the first insertion portion 5 is manually rotated from above to remove the pressing portion 5C of the first insertion portion 5. is brought into contact with the outer surface 1a of the short pipe flange portion Ta (fifth step). The rotation operation of the position adjusting nut 92 can be easily performed by inserting a hand from the top of the manhole M. As shown in FIG. Next, the proximity nut 91 is tightened using a tool (not shown) such as a ratchet wrench or a spanner to draw and fix the first inserted portion 6 to the first inserted portion 5 (fifth step). At this time, by tightening the proximity nut 91 using a tool, the first inserted portion 6 moves downward, and the outer surface 1a of the connecting flange portion 11a has a downward direction from the pressing portion 6B of the first inserted portion 6. Since the force acts, the upper clamping member 10A and the lower clamping member 10B move closer to each other, and a force acts in the direction of closing the divided portion 1. As shown in FIG. As a result, it is possible to prevent water leakage from the joint surface 1b of both the flange portions Va and 12a and prevent water leakage from the joint surface 1b of the divided portion 1. FIG. In this embodiment, by tightening the proximity nut 91 screwed onto the male threaded portion Ra2 of the connecting bolt Ra using a tool that can be operated from above, the upper fastening mechanism Ka can be made to function. There is no need to demolish the manhole M even when the gap with the manhole M is small.

As described above, in this embodiment, since the connecting bolt Ra of the connecting mechanism R is also used for the upper fastening mechanism Ka and the lower fastening mechanism Kb, the bolts for drawing and fixing the upper fastening mechanism Ka and the lower fastening mechanism Kb are used. Since there is no need to separately provide it, the manufacturing cost can be saved by reducing the number of parts, and the reinforcing tool P can be configured compactly.

The insertion direction of the first insertion portion 5 of the upper holding member 10A into the first insertion portion 6 and the insertion direction of the second insertion portion 8 into the second insertion portion 7 of the lower holding member 10B are determined by the connecting mechanism R. Since the upper holding member 10A and the lower holding member 10B move in the same direction (vertical direction), the work in the same direction increases, and even if the gap between the manhole M and the repair valve case X is small, the manhole can be removed. No need to dismantle M.

Moreover, in the present embodiment, the upper clamping member 10A is located above the lower clamping member 10B, the first insertion portion 6 is located above the first insertion portion 5, and the second insertion portion 7 is located above the second insertion portion 5. It is located above the insertion section 8 . With this arrangement, the connection mechanism R and the lower fastening mechanism Kb can be operated by rotating the connecting bolt Ra from above with a tool, and the upper fastening mechanism can be operated by rotating the proximity nut 91 from above with a tool. It is possible to make Ka function. Further, by operating the connecting bolt Ra, an upward force acts from the pressing portion 8C of the second insertion portion 8, and by operating the proximity nut 91, a downward force is exerted from the pressing portion 6B of the first inserted portion 6. Since these are forces in the direction of closing the split portion 1, the joining surface 1b of the split portion 1 is not erroneously widened during operation. In other words, the connection mechanism R, the upper fastening mechanism Ka, and the lower fastening mechanism Kb can all be operated from above, so the gap between the repair valve case X and the manhole M housing the repair valve case X is narrow. Even in such a case, the reinforcing device P can be correctly attached. Therefore, it is not necessary to demolish the manhole M when installing the reinforcing tool P, and the working efficiency can be improved.

The installation jig E of the present embodiment includes a holding mechanism 21 that abuts against the back surface 7Aa of the lower holding member 10B to hold the lower holding member 10B, and a bar member 22 that extends vertically from the holding mechanism 21. I have. As a result, when the lower holding member 10B is attached to the flange portions Va and 12a, the holding mechanism 21 is moved downward by operating the bar member 22 while the holding mechanism 21 is in contact with the lower holding member 10B. The clamping member 10B is pressed. As a result, when the lower fastening mechanism Kb is operated to permanently fix the lower clamping member 10B to the flange portions Va and 12a, the rotation of the lower clamping member 10B can be prevented.

Further, since the installation jig E is composed of the holding mechanism 21 and the rod-like member 22, even if the gap between the side wall Ma of the manhole M and the repair valve case X is narrow, the gap is maintained while the rod-like member 22 is gripped. It becomes possible to insert the installation jig E into the . As a result, the reinforcing member P can be installed with good working efficiency without being affected by the surrounding environment of the flanges 11a, Ta, Va, and 12a.

If, like the holding mechanism 21 of this embodiment, it has the contact locking portion 21Ab that contacts the upper surface 7Ab of the lower clamping member 10B, the installation jig E is brought into contact with the lower clamping member 10B from above. work efficiency can be further improved. Further, if the ejection port 31a is provided in the holding mechanism 21, it is possible to clean the flange portions 11a, Ta, Va, and 12a by blowing off mud or the like with air. Since the ejection port 31a is provided in the holding mechanism 21, work efficiency is high. Furthermore, if the installation jig E is provided with a cutter member 32, even if vinyl covers (poly sleeves) are provided on the flange portions 11a, Ta, Va, and 12a, the cutter member 32 can be used to cut the reinforcing member P. can be installed. Since the cutter member 32 is provided in the holding mechanism 21, work efficiency is high.

In addition, in the upper clamping member 10A, the first insertion portion 5 may be configured to be located above the first insertion portion 6 . Also in this configuration, the first insertion portion 5 and the first inserted portion 6 are pulled together by tightening the proximity nut 91 . Even in this case, the effects of the above-described embodiment can be obtained.

In the following, only the configuration of a reinforcing device P according to another embodiment, which is different from that of the embodiment described above, will be described. In addition, in order to facilitate understanding of the drawings, description will be made using the same member names and reference numerals as in the above-described embodiment.

[Another embodiment 1]
As shown in FIG. 16, the lower clamping member 10B may have the same structure as the upper clamping member 10A. In this case, the lower clamping member 10B is in a state in which the upper clamping member 10A is turned upside down. That is, the lower clamping member 10B has two pressing portions 6B for pressing the region between the two nuts 42b adjacent in the circumferential direction on the outer surface 1a of the valve body flange portion Va of the valve body V. The insertion portion 6 and the first insertion portion 5 having two pressing portions 5C for pressing the region between the heads of two bolts 42a adjacent in the circumferential direction on the outer surface 1a of the branch flange portion 12a of the branch pipe 12. and has. Also, the lower fastening mechanism Kb has a connecting bolt Ra, a proximity nut 91 and a position adjusting nut 92 . In addition, although the connecting bolt Ra in the present embodiment employs a cut bolt, a bolt having a head may be employed.

In this embodiment, when using a tool to tighten the proximity nut 91 of the lower clamping member 10B screwed to the male threaded portion Ra2 of the connecting bolt Ra, it is necessary to operate from the side. If there is enough space between M and M, there is no problem.

As a modification of the first embodiment, the first insertion portion 5 may be provided with a hexagonal concave portion that non-rotatably accommodates the proximity nut 91 of the lower clamping member 10B. In this case, it is possible to operate all of the connecting mechanism R, the upper fastening mechanism Ka, and the lower fastening mechanism Kb from above, as in the above-described embodiment. Moreover, although the first insertion portion 5 and the first insertion portion 6 are configured in a non-rotatable polygonal shape, they may be configured in a columnar shape and provided with anti-rotation protrusions or the like.

[Another embodiment 2]
As shown in FIG. 17, the holding mechanism 21 has a lower clamping member 10B (an example of a clamping member) and an insertion protrusion 23 inserted into a space between the valve body flange portion Va (an example of the flange portion). ing. The insertion protrusion 23 is provided with a hinge 23a that can release the inserted state with respect to the space by moving the rod-shaped member 22 to the outside. In this embodiment, since it is possible to suspend the lower holding member 10B by the insertion protrusion 23, the reinforcement member P held by the installation jig E is attached to the flange portions 11a, Ta, Va, and 12a, and the bar member 22 , the lower fastening mechanism Kb can be fastened while preventing the rotation of the lower clamping member 10B. Since the inserted state of the insertion projection 23 is released by moving the rod-shaped member 22 outward, the installation jig E can be removed. Therefore, work efficiency can be further improved.

[Other embodiments]
(1) Of the holding mechanism 21, at least one of the back covering portion 21Aa, the contact locking portion 21Ab, the cutter member 32, and the fluid ejection path 31 may be omitted.
(2) The connecting bolt Ra is not limited to the head Ra1 that is recessed radially inward from the male threaded portion Ra2, and may be a head Ra1 that protrudes radially outward from the male threaded portion Ra2.
(3) The holding members 10A and 10B may be arranged such that the bolts 41a and 42a or the nuts 41b and 42b are arranged between the two pressing portions 5C, 6B, 7B and 8C. That is, two pressing portions 5C, 6B, 7B, 8C are arranged on both sides of the bolts 41a, 42a or the nuts 41b, 42b.
(4) The pressing portions 5C, 6B, 7B, and 8C of the holding members 10A and 10B are not limited to those formed in a bifurcated shape, and may be composed of a single pressing portion.
(5) The reinforcing member P may be configured by either one of the upper clamping member 10A and the lower clamping member 10B mounted on the flanges 11a, Ta and the flanges Va, 12a.
(6) The reinforcing member P is not limited to use in the repair valve case X. It can be used to prevent water leakage from joints. Further, the reinforcing member P is not limited to the case of using it to prevent water leakage from the joint, but may be used to prevent other liquids or gases from leaking from the joint.

The present invention provides a jig for installing a flange reinforcing tool and a method for installing a flange reinforcing tool, which includes a clamping member that clamps a pair of opposing flange portions in the vertical direction, and a fastening mechanism that clamps the clamping member along the vertical direction. available for

1a: outer surface 6B: pressing portion (second pressing portion)
7Aa: rear surface 7Ab: upper surface 7B: pressing portion (first pressing portion)
10A: upper holding member (second holding member)
10B: Lower holding member (holding member, first holding member)
11a: Connection flange (second flange)
12a: branch flange (flange, first flange)
21: Holding Mechanism 21Ab: Contact Locking Portion 22: Rod-shaped Member 23: Insertion Protrusion 31a: Jet Port 32: Cutter Member E: Installation Jig Ka: Upper Fastening Mechanism (Second Fastening Mechanism)
Kb: lower fastening mechanism (first fastening mechanism)
P: Reinforcement jig (flange reinforcement)
Ra: Connecting bolt Ta: Short pipe flange (second flange)
Va: valve body flange (first flange)

Claims (7)

A flange reinforcing tool that includes a clamping member that clamps a pair of opposing flange portions in the vertical direction, and a fastening mechanism that clamps the clamping member along the vertical direction. An installation jig that holds the clamping member by pressing the clamping member toward the flanges when the clamping member is installed on the pair of flanges by fastening along the
a holding mechanism in which the holding member abuts against an outer surface of the holding member opposite to the side holding the flange portion to hold the holding member;
and a rod-like member extending from the holding mechanism along the vertical direction and operable so that the holding mechanism presses the clamping member toward the flange. 2. The jig for installing a flange reinforcing member according to claim 1, wherein said holding mechanism has a contact locking portion which is locked in contact with the upper surface of said clamping member. 3. The jig for installing a flange reinforcing member according to claim 1, wherein the holding mechanism is provided with an ejection port capable of ejecting a fluid for cleaning the flange portion . 4. The jig for installing a flange reinforcing member according to claim 1, wherein a cutter member is provided at the end of the holding mechanism opposite to the rod member. The holding mechanism has an insertion projection that is inserted into a gap between the clamping member and the flange,
5. The jig for installing a flange reinforcing member according to claim 1, wherein the insertion protrusion is provided with a hinge capable of releasing the state of insertion into the gap by moving the rod-like member to the outside. . A method for installing a flange reinforcing tool using the installation jig according to any one of claims 1 to 5,
A first step of connecting the first clamping member clamping the first flange portion located on the lower side and the second clamping member clamping the second flange portion located on the upper side with a connecting bolt. and,
The first pressing portion located above the first holding member is brought into contact with the outer surface of the first flange portion, and the second pressing portion located above the second holding member is brought into contact with the second holding member. A second step of contacting the outer surface of the flange portion of
a third step of attaching the installation jig to the first clamping member and operating the rod-shaped member so that the holding mechanism presses the first clamping member toward the first flange;
a fourth step of fixing the first clamping member to the first flange portion by tightening the first fastening mechanism while the rod-shaped member is operated in the third step;
and a fifth step of fixing the second clamping member to the second flange portion by tightening the second fastening mechanism after removing the installation jig. . 7. The method of installing a flange reinforcing member according to claim 6, wherein, in said fourth step, said first fastening mechanism is tightened in a state in which said rod member is tilted so as to abut on the side wall of the manhole.

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