JP6902196B2 - Backing metal fixture - Google Patents

Description

The present invention relates to a backing metal fitting, and more specifically, a backing material used for attaching a backing metal bent to the inner dimensions of a steel pipe to a steel pipe for butt welding of a steel pipe, particularly a square steel pipe. It is related to gold fittings.

Square steel pipes (hereinafter sometimes referred to as columns), which are often used for pillars of steel-framed construction, are joined by welding square steel pipes to steel plates (called diaphragms) and then welding the beams to the diaphragm steel plates. A so-called through-diaphragm joining method of joining is often used. When this joining type is adopted, butt welding is generally used for welding the square steel pipe, which is a column, and the diaphragm steel plate, and a backing metal is used for welding.

This backing metal is temporarily attached to the inner end of the column by welding or the like for use. Temporary attachment by welding is performed with the backing metal pressed (attached) to the inner end of the column.
For attaching the backing metal, for example, the backing metal holding device disclosed in Japanese Patent Application Laid-Open No. 2008-26033 is used.

The backing metal holding device disclosed in Japanese Patent Application Laid-Open No. 2008-26033 has a cylinder mechanism including a cylinder and a sliding body housed in the cylinder so as to appear and disappear, and drives the cylinder mechanism to drive the sliding body. A plurality of drive means for infestation and different lengths are prepared in advance, and a tip piece that can be detachably attached to at least one of the cylinder and the sliding body of the cylinder mechanism and an infestation at the tip of the tip piece A plurality of adjusting bolts having different shapes are prepared in advance corresponding to the difference in the radius of the corner portion at the inner end of the column, and the adjusting bolt and the cylinder of the cylinder mechanism located on the opposite side of the adjusting bolt or It is characterized by being provided with a press head that can be detachably attached to the tip of a sliding body.

According to the backing metal pressing device disclosed in Japanese Patent Application Laid-Open No. 2008-26033, there is an advantage that the backing metal can be attached to steel pipes having various diameters.

By the way, welding of a steel pipe and a diaphragm steel plate is performed in a state where a welding root gap having an appropriate width is secured between them. The width of the welding root gap is determined by the amount of protrusion of the backing metal from the end of the column, but the amount of protrusion cannot be adjusted by the backing metal holding device described above.

As a means for adjusting the protrusion amount, for example, a column back metal fitting attachment disclosed in Japanese Patent Application Laid-Open No. 11-3141196 is known.
The column backing metal fitting disclosed in this publication has a double clip structure including a handle portion, a spring portion, a sandwiching portion, and a rooting portion having a temporary fixing portion at the lower end. According to this column backing metal fitting, there is an advantage that the backing metal can be temporarily fixed to the end of the steel pipe while easily adjusting the root gap width. However, on the other hand, the temporary fixing is performed only by placing the temporary fixing portion provided at the lower end of the rooting portion on the upper end of the steel pipe with the backing metal sandwiched between the sandwiching portions. Therefore, in order to lay down or rotate the steel pipe during welding, a fixture must be added. Further, since the member on one side of the sandwiching portion protrudes to the outside of the steel pipe, there is a risk that the welding operator may hit the member, and there is a drawback that the rotation of the steel pipe is hindered as described above. There is.

Japanese Unexamined Patent Publication No. 2008-20033 Japanese Unexamined Patent Publication No. 11-341196

Therefore, according to the present invention, the backing metal can secure a desired root gap width when welding the backing metal to the steel pipe, and the backing metal can be firmly attached to the end of the steel pipe with a predetermined protrusion amount. The purpose is to provide fittings.

The above problem is solved by the backing metal fitting of the present invention having the following configurations (1) to (7).
(1)
A turnbuckle-structured backing metal fitting used to attach a backing metal bent according to the inner dimensions of the steel pipe to the steel pipe for butt welding of the steel pipe, which is the welding base material.
A body member having a first end portion with a female thread that is a right-hand thread and a second end portion that is arranged on the opposite side of the first end portion and has a female thread that is a left-hand thread.
A first support member having a male screw portion screwed into the female screw of the first end portion of the body member on one end side and being movable in the length direction of the body member by rotation of the body member.
A male screw portion screwed into the female screw of the second end portion of the body member is provided on one end side, and due to the rotation of the body member, the movement direction of the first support member is in the length direction of the body member. A second support member that can move in the opposite direction,
It is attached to the other end side of the first support member and the second support member, respectively, holds the backing metal, and is attached to the steel pipe in a positioned state. It includes first and second holding blocks that move with the second support member.
These first and second holding blocks
First and second vertical portion attached to the other end side of the front Symbol first support member and the second support member,
From these first and second vertical portions, a first predetermined length, which is a length smaller than the plate thickness of the backing metal, extends outward (hereinafter, the same) when viewed from the center of the turnbuckle structure, and each backing The first and second mounting parts for placing and holding gold, and
The thickness of the backing metal and the thickness of the backing metal are equal to or greater than the thickness of the backing metal from the first and second vertical portions to the outside in a state of being separated from the first and second mounting portions by a predetermined distance. The first and second route gap width determining means installation parts, which are extended by a second predetermined length of a length equal to or less than the total thickness including the thickness of the steel pipe,
The first and second route gaps are installed in the first and second route gap width determining means installation portions, and the amount of protrusion of the backing metal from the end of the steel pipe is defined to determine the root gap width. A backing fixture that is characterized by having a width determining means.
(2)
The first and second vertical portions, the first and second mounting portions, and the first and second route gap width determining means installation portions of the first and second holding blocks are integrally integrated. The backing metal fitting of the above (1) which is formed.
(3)
Female threads are cut in the first and second root gap width determining means installation portions, respectively, and the first and second root gap width determining means are screwed into the female threads and can move in the length direction. The backing metal fixture of (2) above, which is mainly composed of bolts.
(4)
The backing metal fitting according to any one of (1) to (3) above, wherein the steel pipe is a polygonal steel pipe, a circular steel pipe, an oval steel pipe, or an elliptical steel pipe.
(5)
It said first and second holding blocks, either backing strip fixture before Symbol said detachable from the first support member and second support member (1) to (4).
(6)
The backing metal according to (5), wherein a plurality of types of holding blocks having different outer surface states that come into contact with the inner surface of the backing metal in the vertical portion are prepared for the first and second holding blocks. Fixture.
(7)
The outer surface of the front Kishide straight portion, backing strip fitting of the (6) is flat or curved.

In the backing metal fitting of the present invention, the backing metal can be firmly attached to the steel pipe with a simple turnbuckle structure as a whole, and the backing metal can be firmly attached to the steel pipe end. The amount of protrusion can be adjusted to accurately adjust the width of the root gap.
Further, in the backing metal fitting of the present invention, the backing metal can be accurately arranged horizontally even if the groove portion of the end of the square steel pipe is slanted. Therefore, even if square steel pipes are added one after another, it is possible to erect an accurately vertical column without bending.

FIG. 1 is a perspective view of a backing metal fitting according to an embodiment of the present invention. FIG. 2 is a diagram showing a state in which the backing metal is attached to the square steel pipe by the backing metal attachment tool of FIG. It is a figure which shows the holding block which can correspond to the backing metal bent in an arc shape or the like. FIG. 3 is an arrangement perspective view showing a state in which two U-shaped backing pads are attached to a square steel pipe by using two backing metal attachments shown in FIG. 1 in combination.

Hereinafter, the backing metal fitting according to the embodiment of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a perspective view of a backing metal attachment 10 (hereinafter, referred to as an attachment) according to an embodiment of the present invention.

The attachment 10 is a backing metal attachment having a turnbuckle structure, which is used for attaching a backing metal bent according to the inner dimensions of the steel pipe to the steel pipe for butt welding of a steel pipe which is a welding base material. Is.
Examples of the steel pipe include polygonal steel pipes represented by general square steel pipes, circular steel pipes, oval steel pipes, oval steel pipes, and the like.

The fitting 10 includes a body member 12, which is arranged on the opposite side of the first end 14 having a right-handed female thread and the first end 14, and has a left-hand thread. It has a second end portion 16 with a female thread. The body member 12 is formed with an opening 18 extending in the longitudinal direction as shown in FIG. 1 for the purpose described later.
The fixture 10 further includes first and second support members 30 and 40 having a substantially round bar shape. The first support member 30 has a male screw portion screwed to the female screw of the first end portion 14 of the body member 12 at least on one end side, and the rotation of the body member causes the body member 12 to rotate in the length direction of the body member 12. It is a movable member. On the other hand, the second support member 40 has a male screw portion screwed to the female screw of the second end portion 16 of the body member 12 at least on one end side, and the length of the body member is increased by the rotation of the body member 12. It is a member that can move in a direction opposite to the moving direction of the first support member 30. The male threads formed on the first and second support members 30 and 40 are usually applied to the entire member as shown in the figure.

Backing metal B (see FIG. 2) is held on the other end side of the first and second support members 30 and 40, respectively, and this is attached to the steel pipe C (see FIG. 2) which is the welding base material. The first and second holding blocks 50 and 60, which are intended to be attached in a positioned state and move together with the first and second support members, are detachably attached.
First and second holding blocks 50, 60 thereof has a front Symbol first and second vertical portions 52 and 62 respectively attached to the other end of the first supporting member 30 and the second supporting member 40, these From the first and second vertical portions, a first predetermined length, which is a length smaller than the plate thickness of the backing metal, extends horizontally to the outside when viewed from the center of the turnbuckle structure, and the backing metal is placed respectively. From the first and second vertical portions 52 and 62 in a state of being separated from the first and second mounting portions 54 and 64 to be held and the first and second mounting portions 54 and 64 by a predetermined distance. A second predetermined length horizontally extending to the outside, which is equal to or greater than the thickness of the backing metal and equal to or less than the total thickness obtained by adding the thickness of the backing metal and the thickness of the steel pipe. It is composed of route gap width determining means installation units 56 and 66. The first and second vertical portions, the first and second mounting portions, and the first and second route gap width determining means installation portions of the first and second holding blocks are integrated. It is preferable that they are integrally formed by casting or the like. The upper surfaces of the first and second mounting portions 54 and 64, that is, the mounting surface of the backing metal, are formed as a horizontal plane.

The amount of protrusion of the backing metal B from the end of the steel pipe is defined on the tip side (outside when viewed as a whole of the fixture 10) of the first and second route gap width determining means installation portions 56 and 66. Therefore, the first and second route gap width determining means 58 and 68 for determining the root gap RG width (the first and second route gap width determining means 58 and 68 are profitable. These first and second route gap width determining means 58 and 68 are the first. It is preferable that the second route gap width determining means installation portions 56 and 66 are configured in the form of wing bolts 58a and 68a screwed into female threads cut at the tip end side portions.

By rotating these wing bolts 58a and 68a, the lower end portions thereof can be moved up and down with reference to the first and second route gap width determining means installation portions 56 and 66, whereby the lower end portions thereof. The amount of downward feeding from the first and second route gap width determining means installation portions 56 and 66 can be adjusted.
Since the configuration is as described above, when the backing metal B is installed on the steel pipe C using the holding block 50 (60) as shown in FIG. 2, the lower surface of the root gap width determining means installation portion 56 (66) The distance between the lower end of the wing bolt 58a (68a), that is, the upper edge of the steel pipe C is the root gap RG.
As shown in FIG. 2, the wing bolts 58a and 68a are placed between the vertical portions 52 and 62 and the upper side of the backing metal B placed on the first and second mounting portions 54 and 64. It also acts to lightly pinch. Therefore, the distance between the vertical portions 52 and 62 and the wing bolts 58a and 68a is set to a distance that is equal to or larger than the width of the backing metal B and can sandwich the backing metal.

It is preferable that the first and second holding blocks 50 and 60 are detachable from the first and second support members 30 and 40 by an appropriate connecting means. Then, the shape of the contact surface, that is, the outer surface of the first and second holding blocks 50, 60 to the backing metal of the first and second vertical portions 52, 62 is the planar one shown in FIG. In addition, it is preferable to prepare variously changed ones so that they can correspond to the inner surface shape of the backing metal B. In FIG. 3, as an example thereof, the shape of the contact surface of the first and second vertical portions 52 and 62 with the backing metal depends on the curved surface of the round steel pipe and the curved surface of the corner portion of the square steel pipe. The arc-shaped one is shown so as to correspond to the curved surface of the bent backing metal B.

Next, the procedure for attaching the backing metal B to the steel pipe C using the backing metal attachment 10 will be briefly described.
First, in the state shown in the figure, the wing bolts 58a and 68a are rotated and moved upward, and in this state, the backing metal B is placed on the first and second mounting portions 54 and 64, and then. , The wing bolts 58a, 68a are rotated from the previous time, and the lower ends of the wing bolts 58a, 68a are extended downward so as to have a desired root gap width. After that, the installation state is set as shown in the figure, and in this state, the body member 12 is rotated and fixed. In this state, welding is completed by temporarily fixing the backing metal B to the end of the steel pipe C so that an appropriate root gap width is formed.

As shown in FIG. 4, two backing metal attachments can be used to attach the two backing metal members to the steel pipe at the same time. Therefore, one of the first and second support members 30 and 40 (the first support member 30 in FIG. 4) of one of the two backing metal fittings is lengthened and installed first. Allows the backing metal fitting to penetrate the opening 18. As a matter of course, the length of the other side of the support member (the second support member 40 in FIG. 4) is shortened by the length of the first support member 30.
For example, when two backing metal fittings are used as shown in this figure, each root gap is adjusted by adjusting the position of the lower end of the wing bolt in each backing metal fitting while measuring the level with a level gauge or the like. Adjust the width so that the two backing pads are both horizontal. By placing the diaphragm on the backing metal adjusted horizontally in this way, the posture of the diaphragm is made horizontal, and the plurality of steel pipes added by this can be aligned.

As described above, the backing metal fitting of the present invention has a simple turnbuckle-like structure as a whole, so that the backing metal can be firmly attached to the steel pipe, and the backing metal can be firmly attached. The width of the root gap can be adjusted accurately by adjusting the amount of protrusion from the end of the steel pipe.
Further, in the backing metal fitting of the present invention, the backing metal can be accurately arranged horizontally even if the groove portion of the end of the square steel pipe is slanted. Therefore, even if square steel pipes are added one after another, it is possible to erect an accurately vertical column without bending.

10 Backing metal fitting 12 Body member 14 1st end 16 2nd end 30 1st support member 40 2nd support member 50 1st holding block 52 1st vertical part 54 1st mounting part 56 1st route width Determining means installation part 58 1st route width determining means 60 2nd holding block 62 2nd vertical part 64 2nd mounting part 66 2nd route width determining means installation part 68 2nd route width determining means

Claims (7)

A turnbuckle-structured backing metal fitting used to attach a backing metal bent according to the inner dimensions of the steel pipe to the steel pipe for butt welding of the steel pipe, which is the welding base material.
A body member having a first end portion with a female thread that is a right-hand thread and a second end portion that is arranged on the opposite side of the first end portion and has a female thread that is a left-hand thread.
A first support member having a male screw portion screwed into the female screw of the first end portion of the body member on one end side and being movable in the length direction of the body member by rotation of the body member.
A male screw portion screwed into the female screw of the second end portion of the body member is provided on one end side, and due to the rotation of the body member, the movement direction of the first support member is in the length direction of the body member. A second support member that can move in the opposite direction,
It is attached to the other end side of the first support member and the second support member, respectively, holds the backing metal, and is attached to the steel pipe in a positioned state. It includes first and second holding blocks that move with the second support member.
These first and second holding blocks
First and second vertical portion attached to the other end side of the front Symbol first support member and the second support member,
From these first and second vertical portions, a first predetermined length, which is a length smaller than the plate thickness of the backing metal, extends outward from the center of the turnbuckle structure, and the backing metal is placed on the backing metal. The first and second mounting parts to be held, and
The thickness of the backing metal and the thickness of the backing metal are equal to or greater than the thickness of the backing metal from the first and second vertical portions to the outside in a state of being separated from the first and second mounting portions by a predetermined distance. The first and second route gap width determining means installation parts, which are extended by a second predetermined length of a length equal to or less than the total thickness including the thickness of the steel pipe,
The first and second route gaps are installed in the first and second route gap width determining means installation portions, and the amount of protrusion of the backing metal from the end of the steel pipe is defined to determine the root gap width. A backing fixture that is characterized by having a width determining means. The first and second vertical portions, the first and second mounting portions, and the first and second route gap width determining means installation portions of the first and second holding blocks are integrally integrated. The backing metal fitting according to claim 1 which is formed. Female threads are cut in the first and second root gap width determining means installation portions, respectively, and the first and second root gap width determining means are screwed into the female threads and can move in the length direction. The backing metal fitting according to claim 2, which is mainly composed of bolts. The backing metal fitting according to any one of claims 1 to 3, wherein the steel pipe is a polygonal steel pipe, a circular steel pipe, an oval steel pipe, or an oval steel pipe. It said first and second holding blocks, before Symbol either backing strip fitting of claims 1 to 4 is detachably attached to the first support member and second support member. The backing metal mounting according to claim 5, wherein a plurality of types of holding blocks having different outer surface states that come into contact with the inner surface of the backing metal in the vertical portion are prepared for the first and second holding blocks. Ingredients. The outer surface of the front Kishide straight portion, backing strip fitting according to claim 6 which is flat or curved.

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