JP2014091160A - Fixture for tentative flange welding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fixture for tentative flange welding that can easily support a bolt insertion hole to be in parallel with an elbow pipe.SOLUTION: The fixture 1 for tentative flange welding comprises: a main body 3 with at least one linear side; and at least two pins 4 and 4A that are arranged on a shaft line of the main body 3 extending along the one linear side, or arranged on the arranged location on the shaft line of the main body 3 extending along the linear side and on one apex on the polygonal main body 3 having the arranged location as the other apex, which can be inserted into a bolt hole of the flange.

Description

  The present invention relates to a flange temporary welding attachment jig. Specifically, for example, the present invention relates to a flange temporary welding attachment jig which is attached to temporarily weld the flange to the open end of the elbow pipe.

Conventionally, what was described, for example in patent document 1 as an attachment jig of this kind of welding flange is known.
Specifically, as shown in FIG. 8, a pipe cradle 102 in which a pipe can be moved horizontally by a ball caster 101, and a vertical and angle-adjustable pad that supports a welding flange provided on the pipe cradle 102. 103 and its fixing means 104.

  However, the welding flange mounting jig described in the above-mentioned Patent Document 1 has no problem when the flange is vertically mounted on a straight pipe, but is compatible with an elbow pipe that is bent at a substantially right angle. The current situation is difficult.

In addition, when a flange is attached to the open end of an elbow pipe, the bolt hole must be aligned so that the line connecting the center points of adjacent bolt holes on the flange and the outer edge extension line of the elbow pipe are parallel. .
This is because when the flange bolt holes are aligned when the line connecting the center points of adjacent bolt holes on the flange and the outer edge extension line of the pipe welded to the elbow pipe are not parallel, the outer edges of the elbow pipes are This is because the pipes are connected in a state where they are not parallel or straight to each other, and piping as designed cannot be performed.

  For this reason, when the flange is temporarily attached to the elbow pipe by welding, one person is perpendicular to the opening end of the flange with the elbow pipe fixed, and the bolt insertion hole is parallel to the elbow pipe. It is the present situation that other people are performing temporary welding while supporting in this way.

JP 2010-260092 A

  However, it is very skillful for one person to support the flange so that the flange is perpendicular to the open end and the bolt insertion hole is parallel to the elbow tube, and errors are likely to occur.

  Also, in order to support the flange by hand, attention must be paid to the safety during welding.

  The present invention has been made in view of the above points, and an object thereof is to provide a flange temporary welding attachment jig capable of easily and accurately positioning a bolt hole of a flange. It is.

  In order to achieve the above object, a flange temporary welding mounting jig according to the present invention includes a main body having at least one side that is linear, and an axis of the main body that extends along the one side of the linear shape. Or a flange disposed on the axis of the main body extending along one side of the straight line and another vertex on the polygonal body having the same layout position as one vertex. And at least two pins configured to be insertable into the bolt holes.

  Here, positioning the bolt bolt hole of the flange to be temporarily welded to the open end of the pipe by holding the outer edge of the pipe and one side of the main body in parallel by the main body having at least one side being linear. Is possible.

  In addition, by at least two pins configured to be inserted into the bolt bolt holes of the flange arranged on the axis extending along one side of the main body, in parallel with a line connecting the center points of adjacent bolt holes of the flange It becomes possible to fix the main body to the flange so that one side is located.

Further, the main body includes at least two pins arranged on the axis of the main body extending along one side of the straight line and the other apex on the polygonal main body having the same arrangement position as one apex. As long as one pin is arranged on the axis, the main body can be fixed to the flange so that one side is located in parallel with the line connecting the center points of adjacent bolt holes of the flange.
In other words, the polygon with one pin located on the axis of the main body corresponds to the polygon formed by connecting the center points of the bolt holes of the flange. Other vertices also correspond to the center point of each bolt hole, so if you place one pin at the location on the axis of the body, it will be on the polygonal body with this location as one vertex. It is possible to fix the main body to the flange so that one side is positioned in parallel with the line connecting the center points of the adjacent bolt holes of the flange, no matter where the other pin is arranged at the other vertex.

  In the flange temporary welding mounting jig according to the present invention, when at least one of the pins arranged on the axis of the main body is configured to be movable along the axis of the main body, The position of the pin can be adjusted according to the distance between adjacent bolt holes.

  Moreover, in the flange temporary welding attachment jig according to the present invention, at least one of the pins arranged at the other vertex on the polygonal main body having the arrangement position on the axis of the main body as one vertex is one. When configured to be movable between a vertex and another vertex, the distance between the bolt holes of the flange located at the other vertex of the polygonal body with the location on the axis of the body as one vertex. Accordingly, the position of the pin can be adjusted.

  Moreover, in the flange temporary welding attachment jig according to the present invention, when at least one of the pins is formed in an inclined shape toward the tip of the pin, it can be moored without a gap in the bolt hole of the flange. At the same time, the size of the inner diameter of the bolt hole can be accommodated.

  Further, in the flange temporary welding attachment jig according to the present invention, when both sides of the main body are linear, one side of the main body is held parallel to the right or left outer edge of the pipe. Thus, it is possible to position the bolt hole of the flange to be temporarily welded to the open end of the pipe.

  In order to achieve the above object, a flange temporary welding attachment jig according to the present invention includes a main body having at least one side that is linear, and at least two of the bolt holes of the flange. A pin that can be inserted into the bolt hole and that is arranged so that the one side is positioned in parallel with a line connecting the center points of adjacent bolt holes.

  Here, positioning the bolt bolt hole of the flange to be temporarily welded to the open end of the pipe by holding the outer edge of the pipe and one side of the main body in parallel by the main body having at least one side being linear. Is possible.

  Also, a pin that can be inserted into at least two of the bolt bolt holes in the flange and is positioned so that one side is parallel to a line connecting the center points of adjacent bolt holes. By this, it becomes possible to fix to the flange so that a line connecting one side of the main body and the center point of the bolt hole adjacent to the flange becomes parallel.

  According to the flange temporary welding mounting jig of the present invention, positioning of the bolt hole of the flange can be performed easily and accurately.

It is a plane schematic diagram for demonstrating an example of the attachment jig | tool for flange temporary welding to which this invention is applied. It is a principal part cross-sectional schematic diagram for demonstrating an example of the attachment jig | tool for flange temporary welding to which this invention is applied. It is a plane schematic diagram for demonstrating the state which attached the example of the jig | tool for flange temporary welding to which this invention was applied to the flange. It is a side surface schematic diagram for demonstrating the state which attached the example of the attachment jig | tool for flange temporary welding to which this invention was applied to the flange. It is a plane schematic diagram for demonstrating the other example of the attachment jig | tool for flange temporary welding to which this invention is applied. It is a plane schematic diagram for demonstrating the attachment state to the flange of the other example of the flange temporary welding attachment jig to which this invention is applied. It is a plane schematic diagram for demonstrating the state attached to the flange at the time of providing three pins in the other example of the flange temporary welding attachment jig to which this invention is applied. It is a plane schematic diagram for demonstrating the state attached to the flange when the auxiliary body in the other example of the flange temporary welding attachment jig to which this invention is applied is formed in diagonal. It is a plane schematic diagram for demonstrating the state attached to the flange at the time of providing four pins in the other example of the flange temporary welding attachment jig to which this invention is applied. It is a schematic diagram for demonstrating an example of the conventional fixture for a flange.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

<First Embodiment>
FIG. 1 is a schematic plan view for explaining an example of a flange temporary welding attachment jig to which the present invention is applied, and FIG. 2 is a main part for explaining an example of a flange temporary welding attachment jig to which the present invention is applied. It is a cross-sectional schematic diagram.

  The flange temporary welding attachment jig 1 shown here has a long plate-like main body 3 having two straight sides 2 and 2A, and a flange disposed along the straight portions 2 and 2A of the main body 3. It is composed of pins 4 and 4A that can be inserted into two bolt holes (not shown). The main body 3 is made of aluminum.

  Here, the main body 3 has a length of about 50 cm and a width of about 3 cm, and a pin engagement hole 5 and a pin engagement slot 6 are established along the straight portions 2 and 2A of the main body 3. It is configured.

  The pin 4 has a diameter substantially equal to the inner diameter of the pin engaging hole 5 at the center of the upper end surface 8 of the insertion portion 7 formed in a truncated cone shape so that the outer diameter gradually decreases toward the tip. The protruding portion 9 is integrally formed to project. Further, a male screw portion 10 is provided above the protrusion 9, and a fastening portion 12 having a female screw portion 11 that can be screwed to the male screw portion 10 is attached to the lower end. Yes.

  Here, in the pin 4, the fitting portion 9 is fitted into the pin engaging hole 5, and the male screw portion 10 is inserted with the washer 13 and the spring washer 14. The female screw portion 11 is screwed.

  The pin 4 having such a configuration is attached in a state where the pin engaging hole 5 is sandwiched, and the insertion portion 7 is provided so as to protrude perpendicular to the surface of the main body 3.

  The pin 4A has an inner diameter in the short direction of the pin engaging long hole 6 at the center of the upper end surface 8 of the insertion portion 7 formed in a truncated cone shape so that the outer diameter gradually decreases toward the tip. Protrusions 9 having substantially the same diameter are integrally formed to project. Further, a male screw portion 10 is provided above the protrusion 9, and a fastening portion 12 having a female screw portion 11 that can be screwed to the male screw portion 10 is attached to the lower end. Yes.

  Here, in the pin 4A, the fitting portion 9 is fitted in the pin engaging long hole 6, and the fastening portion 12 is connected to the male screw portion 10 in a state where the washer 13 and the spring washer 14 are inserted into the male screw portion 10. The female screw portion 11 is screwed.

  The pin 4 </ b> A having such a configuration is attached in a state of sandwiching the pin engagement elongated hole 6, and the insertion portion 7 is provided so as to protrude perpendicular to the surface of the main body 3.

  Next, FIG. 3 is a schematic plan view for explaining a state in which an example of a flange temporary welding mounting jig to which the present invention is applied is attached to the flange, and FIG. 4 is a flange temporary welding mounting jig to which the present invention is applied. It is a side surface schematic diagram for demonstrating the state which attached the example to the flange.

  Here, the flange 21 has a pipe joint hole 16 that is substantially the same diameter as the outer diameter of the opening end 18 of the pipe 17 at the center thereof, and four pipe joint holes 16 are formed between the pipe joint hole 16 and the outer peripheral edge 19. Bolt holes 20, 20A, 20B, 20C are drilled at regular intervals.

  The insertion portion 7 of the pin 4 is inserted into the bolt hole 20 of the flange 21 having such a configuration. Further, the insertion portion 7 of the pin 4A is inserted into the bolt hole 20A.

Here, as shown in FIG. 3, when the flange 21 is temporarily welded to the open end 18 of the pipe 17, the pipe joint hole 16 of the flange 21 is fitted into the open end 18 of the pipe 17.
From this state, the flange 21 is rotated in the left-right direction so that the straight line portion 2 of the main body 3 becomes parallel along the outer edge of the pipe 17.

  Further, as shown in FIG. 4, adjustment is performed while the flange 21 is inclined in the horizontal direction so that the surface of the main body 3 and the pipe 17 are parallel to each other.

  As a result, the bolt holes 20, 20 </ b> A of the flange 21 are parallel to the pipe 17, and the flange 21 is maintained horizontal with respect to the open end 18 of the pipe 17.

  At this time, temporary welding of the pipe joint hole 16 of the flange 21 and the open end 18 of the pipe 17 is performed.

  In the present embodiment, the pin 4A is configured to be movable. However, if the pin is arranged on the axis of the main body extending along one linear side, the pin is not necessarily movable. There is no need for a special configuration.

  However, when the pin is configured to be movable, it can be adjusted according to the distance between the bolt holes. Therefore, it is desirable that at least one pin be configured to be movable.

  Further, in the present embodiment, it is formed in an inclined shape toward the tip of the pin. However, if the pin is disposed on the axis of the main body extending along one side of the straight line, the pin is not necessarily formed. There is no need to be inclined toward the tip.

  However, when it is formed in a slanted shape toward the tip of the pin, if the inner diameter of the bolt bolt hole of the flange is within a certain range, the flange bolt hole is not formed with a gap between the pin. Since the pin can be inserted, it is desirable that the pin be inclined toward the tip of the pin.

  Moreover, in this Embodiment, although the both sides of a main body are made into linear form, it is not necessary to make both sides of a main body into linear form.

  However, when both sides of the main body are linear, it is desirable that both sides of the main body be linear because the flange temporary welding attachment jig can be attached to the right or left side of the flange.

  In the present embodiment, the pin is arranged on the axis of the main body extending along the straight line portion of the main body, but the pin is disposed on the axis of the main body extending along one side of the straight line. If it is arranged at the other vertex on the polygonal main body having the same arrangement location as one vertex, it is not necessarily arranged on the axis of the main body.

  In the present embodiment, the two pins are arranged on the axis of the main body extending along the straight portion of the main body, but in parallel with the line connecting the center points of the adjacent bolt holes of the flange. If the main body can be fixed to the flange so that the straight line portion is located, it is not always necessary to use two pins. For example, there may be three pins.

  Further, in this embodiment, the pin is configured as an insertion portion and a fastening portion. However, the pin can be inserted into the bolt hole of the flange, and at least one can move on the axis of the main body. Any configuration is possible as long as it is present.

In the present embodiment, the main body is made of aluminum, but any material may be used as long as it is not affected by heat during welding.
However, for example, it is desirable to use aluminum that has heat resistance and is lightweight and durable.

  In the flange temporary welding attachment jig 1 of the present invention having the above-described configuration, when the flange 21 is attached to the open end 18 of the elbow pipe, the straight portion 2 or 2A of the flange temporary welding attachment jig 1 is used. By making it parallel to the pipe 17, the positions of the bolt holes 20, 20A of the flange 21 in the temporary welding can be determined.

  In addition, by making the main body 3 surface of the flange temporary welding attachment jig 1 and the pipe 17 parallel to each other, the flange 21 in the temporary welding can be supported at right angles to the opening end of the pipe 17.

  Further, by making at least one pin 4A movable according to the distance between the bolt holes 20 and 20A of the adjacent flanges 21, it is possible to cope with the difference in distance between the bolt holes 20 and 20A of the flanges 21. .

  Moreover, by making it inclined toward the front-end | tip of the pins 4 and 4A, while being able to anchor to the bolt hole of the flange 21 without a clearance gap, it can respond to the magnitude of the internal diameter of a bolt hole.

  Thus, in the flange temporary welding attachment jig 1 of the present invention, positioning of the bolt hole of the flange attached to the open end of the pipe can be performed easily and accurately.

<Second Embodiment>
FIG. 5 is a schematic plan view for explaining another example of the flange temporary welding mounting jig to which the present invention is applied.

  The flange temporary welding attachment jig 1A shown here is arranged on a long plate-like main body 3A having two sides of straight portions 2 and 2A, an auxiliary body 15 that is perpendicular to the main body 3A, and the main body 3A. And the pin 4A disposed on the auxiliary body 15. As in the first embodiment, the pin 4 is attached to the pin engagement hole 5 and the pin 4A is attached to the pin engagement slot 6. The main body 3A and the auxiliary body 15 are made of aluminum.

  Here, the auxiliary body 15 has a length longer than the distance between adjacent bolt holes of a flange (not shown) provided with, for example, four bolt holes (not shown).

  Further, as described in detail with reference to FIG. 2, the pin 4 is attached to the center of the upper end surface 8 of the insertion portion 7 formed in a truncated cone shape so that the outer diameter gradually decreases toward the tip. A protruding portion 9 having a diameter substantially the same as the inner diameter of the hole 5 is integrally formed to project. Further, a male screw portion 10 is provided above the protrusion 9, and a fastening portion 12 having a female screw portion 11 that can be screwed to the male screw portion 10 is attached to the lower end. Yes.

  Here, in the pin 4, the fitting portion 9 is fitted into the pin engaging hole 5, and the male screw portion 10 is inserted with the washer 13 and the spring washer 14. The female screw portion 11 is screwed.

  The pin 4 having such a configuration is attached in a state where the pin engaging hole 5 is sandwiched, and the insertion portion 7 is provided so as to protrude perpendicularly to the surface of the main body 3A.

  The pin 4A has an inner diameter in the short direction of the pin engaging long hole 6 at the center of the upper end surface 8 of the insertion portion 7 formed in a truncated cone shape so that the outer diameter gradually decreases toward the tip. Protrusions 9 having substantially the same diameter are integrally formed to project. Further, a male screw portion 10 is provided above the protrusion 9, and a fastening portion 12 having a female screw portion 11 that can be screwed to the male screw portion 10 is attached to the lower end. Yes.

  Here, in the pin 4A, the fitting portion 9 is fitted in the pin engaging long hole 6, and the fastening portion 12 is connected to the male screw portion 10 in a state where the washer 13 and the spring washer 14 are inserted into the male screw portion 10. The female screw portion 11 is screwed.

  The pin 4A having such a configuration is attached in a state where the long hole 6 for pin engagement is sandwiched, and the insertion portion 7 is provided so as to protrude perpendicularly to the surface of the main body 3A.

  Next, FIG. 6 is a schematic plan view for explaining a state in which another example of the flange temporary welding attachment jig to which the present invention is applied is attached to the flange.

  Here, the flange 21 has a pipe joint hole 16 that is substantially the same diameter as the outer diameter of the opening end 18 of the pipe 17 at the center thereof, and four pipe joint holes 16 are formed between the pipe joint hole 16 and the outer peripheral edge 19. Bolt holes 20, 20A, 20B, 20C are drilled at regular intervals.

  The insertion portion 7 of the pin 4 is inserted into the bolt hole 20 of the flange 21 having such a configuration. Further, the insertion portion 7 of the pin 4A is inserted into the bolt hole 20B.

Here, as shown in FIG. 6, when the flange 21 is temporarily welded to the open end 18 of the pipe 17, the pipe joint hole 16 of the flange 21 is fitted into the open end 18 of the pipe 17.
From this state, the flange 21 is rotated in the left-right direction so that the straight portion 2 of the main body 3A is parallel to the outer edge of the pipe 17.

  Further, as shown in FIG. 4, adjustment is performed while the flange 21 is inclined in the horizontal direction so that the surface of the main body 3A and the outer edge of the pipe 17 are parallel to each other.

  As a result, the bolt holes 20, 20 </ b> A of the flange 21 are parallel to the pipe 17, and the flange 21 is maintained horizontal with respect to the open end 18 of the pipe 17.

  At this time, temporary welding of the pipe joint hole 16 of the flange 21 and the open end 18 of the pipe 17 is performed.

  In the present embodiment, the pin 4A is configured to be movable. However, the pin is disposed on the axis of the main body extending along one linear side, and is disposed on the axis of the main body. It is not always necessary to have a configuration in which the pins can be moved as long as the pins are arranged at other vertices on the polygonal main body.

  However, when the pin is configured to be movable, it can be adjusted according to the distance between the bolt holes. Therefore, it is desirable that at least one pin be configured to be movable.

  In the present embodiment, the pin is inclined toward the tip of the pin. However, the pin is disposed on the axis of the main body extending along one linear side, and on the axis of the main body. If it is arranged at the other apex of the polygonal body having the arrangement location as one apex, it does not necessarily have to be inclined toward the tip of the pin.

  However, when it is formed in an inclined shape toward the tip of the pin, if the inner diameter of the flange bolt hole is within a certain range, there is no gap between the pin and the flange bolt hole. In order to be able to insert a pin into the pin, it is desirable that the pin be inclined toward the tip of the pin.

  Moreover, in this Embodiment, although the both sides of a main body are made into linear form, it is not necessary to make both sides of a main body into linear form.

  However, when both sides of the main body are linear, it is desirable that both sides of the main body be linear because the flange temporary welding attachment jig can be attached to the right or left side of the flange.

  In the present embodiment, the two pins are arranged on the axis of the main body extending along one linear side, and the polygonal main body having the arrangement on the axis of the main body as one vertex If the main body can be fixed to the flange so that the straight line portion is positioned in parallel with the line connecting the center points of the adjacent bolt holes of the flange, it is arranged at the other top of the top. There is no need to use a pin. For example, there may be three pins or four pins.

  In this embodiment, the pin has the same configuration as that of the first embodiment, but the pin can be configured in any way as long as it can be inserted into the bolt hole of the flange. It doesn't matter.

In the present embodiment, the main body and the auxiliary body are made of aluminum, but any material may be used as long as it is not affected by heat during welding.
However, for example, it is desirable to use aluminum that has heat resistance and is lightweight and durable.

  In the flange temporary welding attachment jig 1A of the present invention having the above-described configuration, when the flange 21 is attached to the opening end 18 of the elbow-shaped pipe 17, the straight portion 2 or 2A of the flange temporary welding attachment jig 1A is provided. Is parallel to the pipe 17, the positions of the bolt holes 20, 20 </ b> B of the flange 21 in the temporary welding can be determined.

  Further, by making the main body 3A surface of the flange temporary welding attachment jig 1A and the pipe 17 parallel to each other, the flange 21 in the temporary welding can be supported at right angles to the opening end 18 of the pipe 17. .

  In addition, by making at least one pin 4A movable according to the distance between the bolt holes 20 and 20B of the adjacent flange 21, it is possible to cope with the difference in distance between the bolt holes 20 and 20B of the flange 21. .

  Moreover, by making it inclined toward the front-end | tip of the pins 4 and 4A, while being able to anchor to the bolt hole of the flange 21 without a clearance gap, it can respond to the magnitude of the internal diameter of a bolt hole.

  Thus, in the flange temporary welding attachment jig 1A of the present invention, positioning of the bolt bolt hole of the flange attached to the open end of the pipe can be performed easily and accurately.

<Modification>
FIG. 7A is a schematic plan view for explaining a state in which three pins are provided in another example of the flange temporary welding attachment jig to which the present invention is applied, which is attached to the flange. Further, FIG. 7B is a schematic plan view for explaining a state in which the auxiliary body in another example of the flange temporary welding attachment jig to which the present invention is applied is attached to the flange when formed obliquely. Furthermore, FIG. 7C is a schematic plan view for explaining a state in which four pins in another example of the flange temporary welding attachment jig to which the present invention is applied are attached to the flange.

  Here, the flange temporary welding attachment jig 1B shown in FIG. 7A includes a long plate-like main body 3A having two sides as straight portions 2 and 2A, an auxiliary body 15 that is perpendicular to the main body 3A, and a main body. It is composed of pins 4 and 4A arranged on 3A and a pin 4B arranged on the auxiliary body 15. The main body 3A and the auxiliary body 15 are made of aluminum.

Further, the pin 4 is attached to a pin engaging hole 5 (not shown), and the pins 4A and 4B are attached to the pin engaging elongated hole 6.
The distance from the pins 4A and 4B is adjusted starting from the bolt hole 20 of the flange 21, and the pins 4, 4A and 4B are inserted into the bolt holes 20, 20A and 20B of the flange 21.

  Further, the flange temporary welding attachment jig 1C shown in FIG. 7B includes a long plate-shaped main body 3A having two straight sides, an auxiliary body 15 that forms an angle of about 135 ° with the main body 3A, and a main body 3A. It is comprised from the pin 4 arrange | positioned and the pin 4A arrange | positioned at the auxiliary body 15. FIG. The main body 3A and the auxiliary body 15 are made of aluminum.

Furthermore, the pins 4 and 4A are attached to the pin engaging long holes 6.
The pins 4 and 4A are adjusted according to the distance between the bolt hole 20A and the bolt hole 20B of the flange 21, and the pins 4 and 4A are inserted into the bolt holes 20A and 20B of the flange 21, respectively.

  Moreover, the flange temporary welding attachment jig 1D shown in FIG. 7C includes a long plate-shaped main body 3A having two straight sides, a U-shaped auxiliary body 15 connected to the main body 3A, It consists of pins 4 and 4A arranged on the main body 3A and pins 4B and 4C arranged on the auxiliary body 15. A part of the main body 3A and the auxiliary body 15 form a square shape. The main body 3A and the auxiliary body 15 are made of aluminum.

Furthermore, the pins 4, 4A, 4B, 4C are attached to the pin engagement holes 5 (not shown).
The pins 4, 4A, 4B, 4C are inserted into the bolt holes 20, 20A, 20B, 20C of the flange 21.

  In addition, the bolt holes of the flanges in the <first embodiment>, <second embodiment>, and <variation example> of the present invention will be described in detail with respect to the four bolt holes positioned at each vertex of the square. However, it is not always necessary to have four bolt holes.

  For example, five bolt holes positioned at each vertex of a pentagon or six bolt holes positioned at each vertex of a hexagon may be used.

1, 1A, 1B, 1C, 1D Flange temporary welding mounting jig 2, 2A Linear portion 3, 3A Body 4, 4A, 4B, 4C Pin 5 Pin engagement hole 6 Pin engagement slot 7 Insertion portion 8 Upper end surface DESCRIPTION OF SYMBOLS 9 Protrusion part 10 Male thread part 11 Female thread part 12 Fastening part 13 Washer 14 Spring washer 15 Auxiliary body 16 Pipe joint hole 17 Pipe 18 Open end 19 Outer periphery 20, 20A, 20B, 20C Bolt hole 21 Flange

Claims (6)

A body with at least one side straight;
It is arranged on the axis of the main body extending along the one side of the straight line, or the same arrangement position as the arrangement position on the axis of the main body extending along the one side of the straight line is a vertex. A flange temporary welding attachment jig comprising: at least two pins arranged at the other vertex on the polygonal main body and configured to be inserted into a bolt bolt hole. The flange temporary welding attachment jig according to claim 1, wherein at least one of the pins arranged on the axis of the main body is configured to be movable along the axis of the main body. At least one of the pins arranged at the other vertex of the polygon having the arrangement position on the axis of the main body as one vertex is configured to be movable between the one vertex and the other vertex. The flange temporary welding attachment jig according to claim 1 or 2. The flange temporary welding attachment jig according to claim 1, 2 or 3, wherein at least one of the pins is formed in an inclined shape toward a tip of the pin. 5. The flange temporary welding attachment jig according to claim 1, 2, 3, or 4, wherein both sides of the main body are linear. A body with at least one side straight;
A pin disposed in the main body so as to be inserted into at least two of the bolt bolt holes and parallel to a line connecting the center points of the adjacent bolt holes; A flange temporary welding mounting jig.

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