JP5984628B2 - Fire curing jig - Google Patents

Description

  The present invention relates to a fire curing jig. In detail, it is related with the fire curing jig used when cutting the erection piece provided substantially perpendicularly to the column surface.

Conventionally, a steel structure is constructed by joining steel columns and steel beams. Here, for example, when the upper and lower steel columns made of steel pipes are welded together, the construction is performed according to the following procedure.
That is, an erection piece is welded to a joint portion of each steel column in advance at a steel factory.

Next, these steel columns are transported to the site together with the steel beams, and the steel frame is erected at the site. At this time, the relative positions of the upper and lower steel columns are determined, and the lower steel column erection piece and the upper steel column erection piece are temporarily fixed via the joining plate.
Next, welding is performed along the outer peripheral joint portion of the steel column, and after the welding operation is completed, the erection piece is gas-cut.

By the way, when the erection piece is gas-cut, there is a possibility that a fusing spark or a molten metal will scatter and cause a fire. In order to solve this problem, for example, a spark / molten metal scattering prevention jig has been proposed (see FIGS. 3 and 4 of Patent Document 1).
The spark / molten metal scattering prevention jig includes a side wall that is substantially perpendicular to the column surface, a top wall that is provided on the side wall and faces the column surface, and a magnet that is attached to the side wall.

  When this spark / molten metal scattering prevention jig is attached to the column surface with a magnet, almost the entire erection piece is covered with the spark / molten metal scattering prevention jig, and one surface of the space surrounded by the spark / molten metal scattering prevention jig Only become open. Therefore, by inserting a gas cutting torch from the opened surface and gas cutting the erection piece, the melting spark and the molten metal are accommodated in the scattering prevention jig. Therefore, it is possible to prevent the melting spark and the molten metal from being scattered.

JP-A-5-192769

  However, with the above spark / molten metal splash prevention jig, the spark / molten metal splash prevention jig covers almost the entire erection piece, and the erection piece is visible only through one open surface, so check the cutting status. There was a problem that it was difficult to do.

  An object of this invention is to provide the fire curing jig which can confirm the cutting condition of an erection piece easily.

A fire curing jig (for example, a later-described fire curing jig 10) according to claim 1 is an erection piece (for example, a later-described) provided substantially perpendicular to a column surface (for example, later-described column surfaces 40A, 41A). A flame curing jig used for cutting the erection piece 42), which is a box-shaped jig body (for example, a jig to be described later), which is an open surface (for example, an open surface S to be described later) open on one side. A main body 20) and a temporary fixing part (for example, a temporary fixing part 30 described later) for temporarily fixing the jig main body to the erection piece or the column surface, and the jig main body is temporarily fixed The jig body is disposed on one surface (for example, one surface 42A described later) of the erection piece, and the open surface of the jig body is a joint between the erection piece and the column surface. (For example, the cutting part L described later Wherein the cover only.

According to the present invention, in the state where the jig body is temporarily fixed, the jig body is disposed on one surface side of the erection piece, and the open surface of the jig body is bonded to the erection piece and the column surface. Covers the part. Therefore, a gas cutting torch is arranged on the other surface side of the erection piece, and gas cutting is performed along the joint portion between the erection piece and the column surface. Then, fusing sparks and molten metal by gas cutting pass out to one surface side of the erection piece, and are accommodated in the jig body of the fire curing jig through the open surface.
Therefore, instead of covering the entire erection piece with the heat curing jig as in the past, the jig body covers only the joint between the erection piece and the column surface, so that the erection piece can be viewed from multiple directions. The cutting status of the piece can be easily confirmed.
In addition, since the fire curing jig can be reduced in size compared to the conventional one, handling such as transportation and mounting becomes easy.
Moreover, since the spark sparks and molten metal by gas cutting are accommodated in the jig main body of the fire curing jig, it becomes easy to clean the scaffold and the pillar after the cutting work.

  According to the present invention, in a state where the jig main body is temporarily fixed, the jig main body is disposed on one surface side of the erection piece, and the open surface of the jig main body is joined to the erection piece and the column surface. Covers the part. Therefore, a gas cutting torch is arranged on the other surface side of the erection piece, and gas cutting is performed along the joint portion between the erection piece and the column surface. Then, fusing sparks and molten metal by gas cutting pass out to one surface side of the erection piece, and are accommodated in the jig body of the fire curing jig through the open surface. Therefore, instead of covering the entire erection piece with the heat curing jig as in the past, the jig body covers only the joint between the erection piece and the column surface, so the erection piece can be viewed from multiple directions, The cutting status of the piece can be easily confirmed. In addition, since the fire curing jig can be reduced in size compared to the conventional one, handling such as transportation and mounting becomes easy. Moreover, since the spark sparks and molten metal by gas cutting are accommodated in the jig main body of the fire curing jig, it becomes easy to clean the scaffold and the pillar after the cutting work.

It is a perspective view of the fire curing jig concerning one embodiment of the present invention. It is a perspective view which shows the state which temporarily fixed the fire curing jig which concerns on the said embodiment to the erection piece. It is a perspective view for demonstrating the procedure which carries out the gas cutting | disconnection of the erection piece which fixed the fire curing jig which concerns on the said embodiment temporarily.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of a fire curing jig 10 according to an embodiment of the present invention.
The fire curing jig 10 is for cutting the erection piece 42 (see FIG. 2).
The fire curing jig 10 includes a box-shaped jig body 20 that is an open surface S with one surface opened, and a temporary fixing portion 30 that temporarily fixes the jig body 20 to an erection piece 42.

  The jig body 20 is connected to the rectangular bottom portion 21, side wall portions 22 </ b> A, 22 </ b> B, and 22 </ b> C erected along the three sides of the bottom portion 21, and opposed to the bottom portion 21 and connected to the upper end of the side wall portion 22. A canopy portion 23. Among these, the side wall part 22A and the side wall part 22C are arranged to face each other, and the side wall part 22B faces the open surface S.

A substantially U-shaped grip portion 24 for carrying the fire curing jig 10 is attached to the side wall portion 22.
The temporary fixing part 30 includes a pair of plate-like locking pieces 31 attached to the upper and lower sides of the side wall part 22 </ b> A, and a pair of projecting pieces 32 provided on the mutually opposing surfaces of the bottom part 21 and the canopy part 23. .

The above fire curing jig 10 is used in the following procedure.
As shown in FIG. 2, an upper steel column 41 having a rectangular frame shape is disposed on the lower steel column 40 having a rectangular frame shape, and the steel columns 40 and 41 are joined to each other. Joined at C.

Upper and lower erection pieces 42 are welded and fixed to the column surfaces 40A and 41A on the side surfaces of the steel columns 40 and 41 with the joint portion C interposed therebetween.
These erection pieces 42 have a plate shape and are provided substantially perpendicular to the column surfaces 40A and 41A of the steel columns 40 and 41. Each erection piece 42 is formed with a through hole 43 for bolting a not-shown joining plate.

  In the state shown in FIG. 2, it is assumed that welding is completed along the joint C between the steel columns 40 and 41 and the joining plate is removed. From this state, the upper and lower erection pieces 42 on the left side in FIG. 2 are gas-cut along a cutting portion L (indicated by a broken line in FIG. 2) that is a joint portion between these erection pieces 42 and the column surfaces 40A and 41A. And

  First, the pair of locking pieces 31 of the fire curing jig 10 are fitted into the through holes 43 of the upper and lower erection pieces 42, and the erection piece 42 is sandwiched between the upper and lower projection pieces 32. As a result, the locking piece 31 and the protruding piece 32 function as a spacer that holds the relative position of the fire curing jig 10 with respect to the upper and lower erection pieces 42, while the fire curing jig 10 is temporarily attached to the upper and lower erection pieces 42. Fix it.

  In a state where the fire curing jig 10 is temporarily fixed, the jig body 20 is disposed on one surface 42A side (here, the left rear side in FIG. 2) of the erection piece 42, and the jig body 20 is opened. The surface S covers the cut portion L, is not in contact with the upper and lower erection pieces 42, and is slightly separated.

  Next, as shown in FIG. 3, the gas cutting torch 44 is arranged on the other surface 42 </ b> B side (here, the right front side in FIG. 2) of the erection piece 42, and gas cutting is performed along the cutting portion L. Then, the melted spark and molten metal due to gas cutting pass out to the one surface 42 </ b> A side of the erection piece 42 and are accommodated in the jig body 20 of the fire curing jig 10.

According to this embodiment, there are the following effects.
(1) Rather than covering the entire erection piece with the heat curing jig as in the prior art, only the cutting portion L is covered with the jig body 20, so that the erection piece 42 can be viewed from multiple directions. The cutting status can be easily confirmed.
Moreover, since the fire curing jig 10 can be reduced in size compared to the conventional case, handling such as transportation and mounting becomes easy.
Further, since the spark body and molten metal by gas cutting are accommodated in the jig body 20 of the fire curing jig 10, the cleaning of the scaffold and the pillar after the cutting operation is simplified.

  (2) Since the jig main body 20 of the fire curing jig 10 is slightly separated from the erection piece 42, it is possible to visually confirm that the flame penetrates the erection piece 42 during gas cutting, thereby improving the safety of the gas cutting work. In addition, the jig body 20 can be prevented from being cut together with the erection piece 42.

  It should be noted that the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within a scope that can achieve the object of the present invention are included in the present invention.

C: Joining part L ... Cutting part S ... Opening surface 10 ... Fire curing jig 20 ... Jig body 21 ... Bottom part 22, 22A, 22B, 22C ... Side wall part 23 ... Canopy part 24 ... Grasping part 30 ... Temporary fixing part 31 ... locking piece 32 ... projecting piece 40, 41 ... steel column 40A, 41A ... column face 42 ... erection piece 42A ... one side of erection piece 42B ... other side of erection piece 43 ... through hole 44 ... torch for gas cutting

Claims (1)

A fire curing jig used when cutting an erection piece provided substantially perpendicular to a column surface,
A box-shaped jig body that is an open surface with one surface open, and a temporary fixing portion that temporarily fixes the jig body to the erection piece or the column surface,
In the state where the jig body is temporarily fixed, the jig body is disposed on one surface side of the erection piece, and the open surface of the jig body is a joint between the erection piece and the column surface. Fire curing jig characterized by covering only the part.

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