JP2019199687A - Erection tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an erection jig and the like which can surely perform connection and release with a steel material. SOLUTION: An installation jig 1 is connected to an H-shaped steel and used for the installation. The installation jig 1 includes a columnar main body 2, a rod 7 arranged along the axial direction of the main body 2, and a pair of couplings provided at the lower end of the main body 2 for inserting an H-shaped steel therebetween. For preventing rotation of the rod 7 around the axis, and the connecting plate 21 that is inserted into and removed from the pair of connecting plates 19 and the pin holes provided in the H-shaped steel by rotation of the rod 7 around the axis. And a stopper 25. [Selection diagram] Figure 1

Description

  The present invention relates to a steel construction jig.

  The construction of the structural pillar is performed by, for example, building a steel material such as H-shaped steel in an excavated part excavating the ground and burying and fixing the lower end of the steel in the concrete of the structural pillar pile. When the top end of the structural pillar (steel material) is located below the ground surface, connect an erection jig (also called Yatco) to the upper end of the steel material, and use the erection jig on the ground to bring the steel material to an appropriate depth. The concrete with the lower end of the steel material is awaited to solidify while being held in the posture.

  Patent Documents 1 and 2 describe such an erection jig that allows a pin to be taken in and out of a hole in two steel plates provided at the lower end. By inserting the upper end of the H-shaped steel web between these steel plates and inserting a pin into the hole in the steel plate and the upper end of the H-shaped steel web, the H-shaped steel is connected to the erection jig. be able to.

Japanese Utility Model Publication No. 4-97939 Japanese Utility Model Publication No. 3-103330

  When there are many structural pillars installed, it is expensive to connect the construction jig to all of the steel materials, and the construction jig that can be reliably connected to and released from the steel material for diversion. Is required.

  In Patent Documents 1 and 2, when releasing the connection between the mounting jig and the H-shaped steel, the pin is pulled out of the hole by pulling the wire connected to the pin from the ground. There was concern about the method of releasing the connection in terms of certainty. For example, if a wire or the like is caught on some obstacle, there is a possibility that the pin cannot be pulled out successfully.

  This invention is made | formed in view of the problem mentioned above, The objective is to provide the erection jig etc. which can perform connection with a steel material, and its cancellation | release reliably.

  The present invention for achieving the above-described object is an erection jig used for erection of the steel material by being connected to a steel material, a columnar main body, and a rod arranged along the axial direction of the main body. A pair of connecting plates provided at the lower end of the main body for inserting the steel material therebetween, and a pair of connecting plates and the steel material inserted between the pair of connecting plates by rotation around the axis of the rod. A connecting pin that is inserted into and removed from the provided pin hole and a stopper for preventing rotation around the axis of the rod, and a plurality of handles that protrude laterally from the rod are provided above and below the rod. It is a built-in jig characterized by this.

  In the present invention, the connecting pin for connecting the erection jig and the steel material is put in and out of the linking plate and the steel material pin hole by rotation around the axis of the rod. Connection to and release from the steel material can be performed reliably.

  Further, the rod can be easily operated by providing a handle on the rod. By providing the handle vertically, when the steel material is installed, the construction jig can be connected and released on the ground by operating the rod with an appropriate handle. Also, it is possible to prevent the connecting pin from coming out of the connecting plate and the pin hole of the steel material due to the unintended rotation of the rod by the stopper, and the connection between the construction jig and the steel material is released and the steel material is prevented from falling out of the construction jig. it can.

The stopper is preferably one that fixes the position of the handle. For example, the stopper is a rod-shaped member that can move up and down and rotate around an axis, and a protrusion is provided on a side surface, and the protrusion is provided on a side surface of a cylindrical holding portion through which the stopper is passed. It is passed through a bowl-shaped groove.
As described above, when the rod is operated by the handle, unintentional rotation of the rod can be prevented by fixing the handle with the stopper. In addition, by passing the stopper protrusion through the bowl-shaped groove described above, the stopper can be fixed at multiple heights by the vertical movement of the stopper and rotation around the axis, and the stopper prevents the rod from rotating. It is possible to switch between the released state and the released state according to the height of the stopper.

It is preferable that an arm is provided on the rod, and the arm is rotatably connected to a pin holding portion that holds the connecting pin.
Accordingly, the rotation of the rod can be suitably converted into a connecting / removing movement of the connecting pin by a crank type mechanism, and the connection between the erection jig and the steel material and the release thereof can be performed more reliably.

Preferably, a plate is attached along the axial direction of the main body, and a plurality of holes are provided in the plate at intervals in the axial direction of the main body.
By selecting an appropriate hole from the above holes and using it for mounting a fixing jig for fixing the erection jig, the erection jig is fixed at an appropriate height that matches the erection depth of the steel material. can do.

It is desirable that a pair of sandwiching plates for sandwiching the steel material is provided at the lower end of the main body, and one or more plate-like spacers are disposed between the main body and the sandwiching plate.
Thereby, the space | interval of pinching plates can be adjusted according to the cross-sectional dimension of steel materials, steel materials can be pinched appropriately with a pinching plate, and position shift of steel materials can be prevented.

  ADVANTAGE OF THE INVENTION According to this invention, the erection jig etc. which can perform connection with a steel material and its cancellation | release reliably can be provided.

The figure which shows the erection jig 1. FIG. The figure shown about the connection procedure of the erection jig 1 and the H-section steel 45. The figure shown about the connection procedure of the erection jig 1 and the H-section steel 45. The elevation view of the erection jig 1 and the H-section steel 45. The figure which shows the horizontal cross section along line AA of FIG. The figure shown about the connection procedure of the erection jig 1 and the H-section steel 45. The elevation view of the erection jig 1 and the H-section steel 45. The figure which shows the H-section steel 45 used as a construction pillar. The figure which shows the construction method of the H-section steel 45. The figure which shows the range B of FIG.9 (b). The figure which shows the spacer 63. FIG.

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

(1. Built-in jig 1)
FIG. 1 is a view showing an erection jig 1 (Yatco) according to an embodiment of the present invention. This erection jig 1 is used by being connected to the upper end portion of the H-shaped steel when the H-shaped steel is built into the excavation portion of the ground to be a true pillar. FIG. 1 shows the erection jig 1 before connecting the H-section steel.

  The mounting jig 1 is provided with a rod 7, an arm 13, a pin holding portion 15, a connecting plate 19, a connecting pin 21, a stopper 25, a height adjusting plate 37, a sandwiching plate 41, and the like on the main body 2. It is.

  The main body 2 of the erection jig 1 is a columnar member, and an H-section steel composed of a pair of flanges 3 (3a, 3b) and a web 5 is used.

  In the vicinity of the inner surface of one flange 3 a of the main body 2, a rod 7 is disposed along the axial direction of the main body 2. The rod 7 has an upper end located near the upper end of the main body 2 and a lower end located below the lower end of the main body 2. “Upper” corresponds to the upper side of FIG. 1, and “Lower” corresponds to the lower side of FIG.

  The rod 7 is held through the inside of a cylindrical rod holding portion 9 fixed to the inner surface of the flange 3a, and can rotate around the axis. In the present embodiment, a plurality (three in the example of FIG. 1) of the rod holding portions 9 are provided vertically, but the number of the rod holding portions 9 is not limited to this. For example, the rod holding portion 9 may be provided only at one location near the center of the rod 7.

  A handle 11 is provided on the rod 7. The handle 11 is a rod-like member that protrudes laterally from the rod 7, and in the present embodiment, a plurality of handles 11 (two handles 11a and 11b in the example of FIG. 1) are provided up and down. The rod 7 can be rotated around an axis by operating with any one of the handles 11.

  One end of the arm 13 is fixed to the lower end of the rod 7. The other end of the arm 13 is connected to the pin holding part 15.

  The pin holding part 15 holds the connecting pin 21, and has a pair of horizontal plates 15a arranged opposite to each other, and a vertical plate 15b fixed to the web 5 side end of both horizontal plates 15a. The connecting pin 21 is fixed to the surface of the vertical plate 15b on the web 5 side.

  The other end of the arm 13 is inserted between a pair of horizontal plates 15 a of the pin holding portion 15 and is rotatably connected to the horizontal plate 15 a by a shaft 17.

  At the lower end portion of the web 5 of the main body 2, the connecting plates 19 are fixed to both surfaces of the web 5 one by one. The pair of connecting plates 19 are provided for inserting an H-shaped steel web therebetween. A chamfer 20 is applied to the corners of the lower ends of the opposing surfaces of the connecting plates 19. Each connecting plate 19 is provided with a pin hole 23 through which the connecting pin 21 is passed.

  A stopper 25 is disposed in the vicinity of the inner surface of the other flange 3 b of the main body 2 along the axial direction of the main body 2. The stopper 25 is provided to prevent unintentional rotation of the rod 7. The stopper 25 is a bar-like member that can move up and down, and has an upper end located near the upper end of the main body 2 and a lower end located near the lower end of the main body 2.

  The stopper 25 is passed through the inside of a cylindrical stopper holding portion 27 fixed to the inner surface of the flange 3b, and is held rotatably around the axis. A plurality of stopper holding portions 27 (two in the example of FIG. 1) are provided above and below, and a bowl-shaped groove 29 is formed on each side surface.

  The groove 29 has a straight portion 29a along the axial direction of the stopper 25 and a bent portion 29b obtained by bending the upper end of the straight portion 29a into a bowl shape.

  A bar-shaped protrusion 31 is provided on the side surface of the stopper 25. In the present embodiment, a plurality of protrusions 31 (two protrusions 31 a and 31 b in the example of FIG. 1) are provided above and below, and these protrusions 31 are respectively passed through the corresponding grooves 29 of the upper and lower stopper holding parts 27. The

  A lock portion 33 is fixed to the inner surface of the flange 3b above the upper stopper holding portion 27. The lock portion 33 includes a pair of horizontal plates 331 arranged to face each other, and each horizontal plate 331 has a lock hole 35 through which the upper end 25a of the stopper 25 is passed.

  In FIG. 1, the protrusion 31 of the stopper 25 is disposed at the lowest end of the linear portion 29 a of the groove 29, and the stopper 25 is at the lowest position. At this time, the upper end 25a of the stopper 25 is not passed through the lock hole 35 (is removed from the lock hole 35).

  In this embodiment, the upper and lower two handles 11 and the protrusions 31 are provided. However, the present invention is not limited to this, and three or more handles 11 and protrusions 31 may be provided. In the present embodiment, two stopper holding portions 27 are provided, but three or more stopper holding portions 27 may be provided, or one long stopper holding portion 27 may be provided. In the latter case, the groove 29 can be formed in one stopper holding portion 27 corresponding to the projection 31. Moreover, you may provide the stopper holding | maintenance part 27 and the projection part 31 one each.

  A height adjusting plate 37 along the axial direction of the main body 2 is fixed to the outer surfaces of both flanges 3a and 3b of the main body 2 by welding or the like. A plurality of adjustment holes 39 are provided in the height adjustment plate 37 at intervals in the axial direction of the main body 2.

  One sandwiching plate 41 is provided on each of the outer surfaces of the lower ends of the flanges 3a and 3b. The pair of sandwiching plates 41 are for sandwiching an H-shaped steel flange therebetween. These sandwiching plates 41 are fixed to the flanges 3a and 3b by using fasteners 43 such as bolts, and chamfers 42 are applied to the corners at the lower ends of the opposing surfaces.

(2. Connection of erection jig 1 and H-shaped steel 45)
2, 3, and 6 are diagrams showing a procedure for connecting the erection jig 1 and the H-section steel 45. 4 and 7 are elevation views of the erection jig 1 and the H-section steel 45 of FIGS. 3 and 6, respectively, and FIG. 5 shows a horizontal section along the line AA of FIG. . Here, it is assumed that a cross-sectional dimension of a cross section (hereinafter simply referred to as a cross section) in a direction orthogonal to the axial direction of the main body 2 is substantially the same as that of the H-section steel 45.

  In order to connect the erection jig 1 and the H-shaped steel 45, first, as shown in FIG. 2, the H-shaped steel 45 is interposed between the two linking plates 19 of the erection jig 1 (see FIG. 1). The upper end portion of the web 49 is inserted, and the H-section steel 45 is arranged so that the upper end portions of both flanges 47 of the H-section steel 45 are sandwiched between the two sandwiching plates 41 (see FIG. 1) of the erection jig 1. Since the connecting plate 19 and the sandwiching plate 41 are chamfered 20 and 42, the H-section steel 45 can be arranged smoothly.

  A pin hole 59 (see FIG. 5) is provided at the upper end of the web 49 of the H-shaped steel 45. In the state shown in FIG. 2, the pin hole 59 of the H-shaped steel 45 and the pin hole 23 of the connecting plate 19 are provided. Are in corresponding positions.

  Next, the rod 7 is operated by the handle 11 to rotate around the axis as indicated by an arrow a in FIG. Then, the arm 13 fixed to the rod 7 rotates together with the rod 7, and the pin holding portion 15 at the tip of the arm 13 moves toward the web 49 of the H-section steel 45.

  As a result, the connecting pin 21 is inserted into the connecting plate 19 and the pin holes 23 and 59 of the H-shaped steel 45 as shown in FIG. 5, and the H-shaped steel 45 is inserted into the mounting jig 1 as shown in FIGS. Connected to The sandwiching plate 41 prevents the displacement of the H-section steel 45 by sandwiching both flanges 47 of the H-section steel 45. At this time, the tip of the upper handle 11 a is disposed between the pair of horizontal plates 331 of the lock portion 33.

  Next, as shown in FIGS. 6 and 7, the stopper 25 is moved upward and its upper end 25a is passed through the lock hole 35 of each horizontal plate 331, whereby the tip of the handle 11a is moved to the main body 2 side by the upper end 25a. It is possible to prevent the rod 7 from rotating by suppressing the position of the handle 11a, and to prevent the connecting pin 21 from coming out of the connecting plate 19 and the pin holes 23 and 59 of the H-shaped steel 45.

  When the stopper 25 is moved upward, the stopper 25 is moved upward so that the protrusion 31 of the stopper 25 moves from the lowermost end of the linear portion 29a of the groove 29 to the bent portion 29b as shown by an arrow b in FIG. And rotate around the axis.

  Accordingly, the height of the stopper 25 is fixed in a state where the upper end 25 a of the stopper 25 is inserted into the lock holes 35 of the pair of horizontal plates 331 of the lock portion 33.

  When releasing the connection between the erection jig 1 and the H-shaped steel 45, the stopper 25 is operated in the opposite direction to release the fixing of the handle 11 a by the upper end 25 a of the stopper 25. The rod 7 is operated to rotate in the direction opposite to the above direction (the direction indicated by the arrow a in FIG. 2). As a result, the connecting pin 21 comes out of the connecting plate 19 and the pin holes 23 and 59 of the H-shaped steel 45, and the connection between the erection jig 1 and the H-shaped steel 45 is released.

  As shown in FIG. 5, the pin hole 23 of the connecting plate 19 on the pin holding portion 15 side has a larger diameter than the pin hole 23 of the other connecting plate 19. Therefore, the connecting pin 21 can be smoothly put in and out.

(3. Method for installing H-section steel 45)
FIG. 8 is a view showing an example of an H-section steel 45 used as a structural pillar. The H-section steel 45 is built in the excavation part 53 of the ground 51, and its top end is located below the ground surface. The lower end portion of the H-shaped steel 45 is embedded in the upper end portion of the concrete of the structural pillar pile 57. The excavation part 53 above the structural pillar pile 57 is backfilled with backfill soil 58.

  Hereinafter, a method for installing the H-shaped steel 45 will be described with reference to FIG.

  In the present embodiment, as shown in FIG. 9A, first, the ground 51 is excavated in the vertical direction to form the excavated portion 53, and the concrete of the frame pillar pile 57 is placed. Then, the H-shaped steel 45 is suspended in the vertical direction in the excavation part 53 and the upper jig is temporarily supported by the ground mount 54 to connect the erection jig 1 and the H-shaped steel 45. .

  The connection method is as described above, but the operation of the rod 7 and the stopper 25 at this time may be performed on the ground with the handle 11b below the rod 7 close to the ground surface and the protrusion 31b below the stopper 25. .

  After that, before the concrete of the structural pillar pile 57 is solidified, as shown in FIG. 9B, the H-section steel 45 is built up to a predetermined depth of the excavation portion 53, and the lower end portion of the H-section steel 45 is connected to the construction pillar. The pile 57 is buried in the upper end portion of the concrete. Although the top end of the H-shaped steel 45 is below the ground surface, a part of the erection jig 1 is on the ground, and a base 54 provided with a fixing jig 55 attached to the height adjustment plate 37 on the ground surface. Installed on top.

  FIG. 10 is a diagram showing a range B in FIG. As shown in FIG. 10, as the fixing jig 55 and the height adjustment plate 37, an appropriate one of the adjustment holes 39 of the height adjustment plate 37 is selected, and the adjustment hole 39 and the fixing jig 55 are selected. The positions of the holes (not shown) provided are aligned, bolts 61 are passed through these holes, and the nuts are fastened to the tips thereof to fix the holes.

  Thus, the erection jig 1 can be fixed at an appropriate height in accordance with the erection depth of the H-section steel 45, and the H-section steel 45 is held in this state. After the concrete of the structural pillar pile 57 is solidified, the connection between the erection jig 1 and the H-section steel 45 is released, and the erection jig 1 is removed from the H-section steel 45 as shown in FIG.

  The method of releasing the connection between the erection jig 1 and the H-shaped steel 45 is as described above, but the operation of the stopper 25 and the rod 7 at this time is performed by the protrusion 31 a on the upper part of the stopper 25 and the handle on the upper part of the rod 7. 11a (see FIG. 10) can be performed on the ground.

  After removing the erection jig 1 in this way, the excavation part 53 above the structural pillar pile 57 is backfilled with backfill 58 as shown in FIG. Alternatively, it may be backfilled with fluidized soil. The removed erection jig 1 can be diverted to erection of other H-section steel 45.

  Thus, in this embodiment, the connecting pin 21 for connecting the erection jig 1 and the H-shaped steel 45 is connected to the connecting plate 19 and the pin hole of the H-shaped steel 45 by the rotation around the axis of the rod 7. 23 and 59, the connection of the erection jig 1 and the H-shaped steel 45 and the release thereof can be reliably performed by operating the rod 7.

  In this embodiment, the rod 7 can be easily operated by providing the handle 7 on the rod 7. The handle 11 is provided on the upper and lower sides. When the H-shaped steel 45 is installed, either the appropriate handle 11 (when connected) is used both when the mounting jig 1 and the H-shaped steel 45 are connected and when the connection is released. The rod 7 can be operated on the ground by the lower handle 11b, and when the connection is released, the upper handle 11a).

  In the present embodiment, a stopper 25 for preventing the rotation of the rod 7 is provided. As a result, the connecting pin 21 comes out of the connecting plate 19 and the pin holes 23 and 59 of the H-shaped steel 45 by unintended rotation of the rod 7 when the H-shaped steel 45 is built, and the mounting jig 1 and the H-shaped steel It is possible to prevent the H-shaped steel 45 from being detached from the erection jig 1 by being disconnected from the 45.

  In particular, in the present embodiment, the tip end of the handle 11a is held to the main body 2 side by the upper end 25a of the stopper 25, and the rotation of the rod 7 is prevented by fixing the position of the handle 11a. Further, the protruding portion 31 on the side surface of the stopper 25 is passed through a bowl-shaped groove 29 provided on the side surface of the stopper holding portion 27, so that the stopper 25 is moved at a plurality of heights by the vertical movement of the stopper 25 and the rotation around the axis. (The height when the protruding portion 31 is at the lowermost end of the straight portion 29a as shown in FIG. 1 and the height when the protruding portion 31 is arranged at the bent portion 29b as shown in FIG. 6) Therefore, the state in which the rotation of the rod 7 is prevented by the stopper 25 and the state in which the rod 7 is released can be switched according to the height of the stopper 25.

  The rod 7 is provided with an arm 13, and the arm 13 is rotatably connected to a pin holding portion 15 that holds the connecting pin 21, so that the rotation of the rod 7 is made possible by the crank type mechanism. It can convert into a motion suitably and can perform the connection and the cancellation | release of the erection jig 1 and the H-shaped steel 45 more reliably.

  Moreover, in this embodiment, an appropriate thing is selected from the several adjustment holes 39 of the plate 37 for height adjustment, and it is used for attachment of the fixing jig 55 for fixing the construction jig 1, so The tool 1 can be fixed at an appropriate height according to the erection depth of the H-shaped steel 45. Moreover, when diverting the construction jig 1 and constructing the plurality of H-shaped steels 45 at different depths, the construction jig 1 can be fixed at an appropriate height according to each depth. .

  However, the present invention is not limited to this. For example, in this embodiment, the main body 2 of the erection jig 1 is an H-section steel having the same cross-sectional dimension as the H-section steel 45, but the cross-section dimensions of the main body 2 and the H-section steel 45 may not be the same. Well, it is possible to compensate for the difference in cross-sectional dimensions using a spacer or the like.

  For example, in the example of FIG. 11, the H-shaped steel 45 has a larger distance (the distance between the outer surfaces of both flanges 47) than the main body 2 of the erection jig 1, but in this case, the fastener 43 is removed and the sandwiching plate 41 is removed. Is once removed from the flange 3, one or more plate-like spacers 63 (shim plates) are disposed between the flange 3 and the sandwiching plate 41, and the sandwiching plate 41 and the spacer 63 are again connected to the flange 3 by the fasteners 43. Secure to.

  The distance between the sandwiching plates 41 can be adjusted according to the H-shaped steel 45 due to the thickness and the number of the spacers 63. Can be prevented. In addition, when the plurality of H-section steels 45 having different reasons are built by diverting the erection jig 1, the H-section steel 45 can be appropriately sandwiched according to each cause.

  However, if the H-shaped steel 45 to be built using the erection jig 1 is uniform, even if the pinch plate 41 is welded and fixed to the flange 3 by matching the cause of the main body 2 with the H-shaped steel 45. Good. Alternatively, the sandwiching plate 41 can be omitted if the H-shaped steel 45 can be stably connected only by the connecting pin 21.

  In the present embodiment, the main body 2 of the mounting jig 1 is an H-shaped steel. However, the shape is not limited to this, and the cross-sectional shape may be rectangular or circular as long as the rigidity is the same as that of the H-shaped steel 45. . Further, the steel material built by the erection jig 1 is not limited to the H-section steel 45. These cross-sectional shapes should just be a combination which can connect the main body 2 and the steel material of the construction jig 1 with the connecting pin 21.

  In the present embodiment, the crank type mechanism including the arm 13 and the pin holding portion 15 is used to convert the rotational movement of the rod 7 into the movement in and out of the connecting pin 21, but the conversion mechanism is not limited to this. For example, a rotary gear can be used.

  Further, the means for preventing the rotation of the rod 7 is not limited to that using the stopper 25. If the rod 7 does not rotate during erection, another stopper may be used.

  Further, in the present embodiment, an appropriate adjustment hole 39 of the height adjustment plate 37 is selected and the fixing jig 55 is attached, whereby the fixing height of the erection jig 1 is set to the erection depth of the H-section steel 45. If the position of the top end of the H-shaped steel 45 to be built using the erection jig 1 is uniform, the fixing jig 55 is adjusted to an appropriate height of the flange 3 of the erection jig 1. May be fixed by welding.

  Moreover, although the construction example of the construction pillar was demonstrated in this embodiment, the construction jig 1 is applicable also in other construction. For example, the present invention can also be applied when building steel as a core material for cast-in-place concrete piles or a ground material for continuous underground walls such as soil cement walls.

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to such examples. It will be apparent to those skilled in the art that various changes or modifications can be conceived within the scope of the technical idea disclosed in the present application, and these naturally belong to the technical scope of the present invention. Understood.

1: Construction jig 2: Body 7: Rod 9: Rod holding part 11, 11a, 11b: Handle 13: Arm 15: Pin holding part 19: Connecting plate 21: Connecting pin 23, 59: Pin hole 25: Stopper 27: Stopper holding portion 29: Groove 31, 31a, 31b: Projection portion 33: Lock portion 37: Height adjustment plate 39: Adjustment hole 41: Pinch plate 45: H-section steel 51: Ground 53: Excavation portion 55: Fixed Jig 57: Structural column pile 58: Backfill 63: Spacer

Claims (6)

An erection jig used for erection of the steel material connected to the steel material,
A columnar body,
A rod disposed along the axial direction of the body;
A pair of connecting plates provided at the lower end of the main body for inserting the steel material therebetween;
A connection pin that is inserted into and removed from a pair of the connection plates and a pin hole provided in the steel material inserted between the connection plates by rotation around the axis of the rod;
A stopper for preventing rotation around the axis of the rod;
Comprising
A mounting jig characterized in that a plurality of handles protruding laterally from the rod are provided above and below the rod.   The construction jig according to claim 1, wherein the stopper fixes the position of the handle. The stopper is a rod-like member that can move up and down and rotate around an axis, and has a protrusion on the side surface.
The erection jig according to claim 2, wherein the protrusion is passed through a gutter-like groove provided on a side surface of a cylindrical holding part through which the stopper is passed. An arm is provided on the rod;
The erection jig according to any one of claims 1 to 3, wherein the arm is rotatably connected to a pin holding portion that holds the connection pin. A plate is attached along the axial direction of the main body,
The mounting jig according to any one of claims 1 to 4, wherein the plate is provided with a plurality of holes at intervals in the axial direction of the main body. A pair of sandwiching plates for sandwiching the steel material is provided at the lower end of the main body,
6. The erection jig according to claim 1, wherein one or a plurality of plate-like spacers are arranged between the main body and the sandwiching plate.

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