JPH05169252A - Jig and method for making u-shaped cutting of square pipe or column material for steel-frame building - Google Patents

Abstract

PURPOSE:To provide a jig for making U-shaped cutting for anchor bolt in a square pipe or column material (hereinafter referred to as square pipe) which is used for a pillar in a steel-frame building structure and cutting method thereof. CONSTITUTION:The jig is constituted of a guide plate 1 having a U-shaped inner edge 2 which is mounted in a prescribed position of the upper surface or the inner surface of each frame of the square pipe P which is laid on its side on a base, lifting means with which this guide plate is lifted from the mounting surface and means 3-6 for positioning/engaging the guide plate in the prescribed position. Cutting method is executed by respectively gas cutting the upper surface of the upper frame and inner surface of the lower frame of the square pipe which is laid on its side by utilizing the jig. Successively, the square pipe is turned by 90 deg. and two remaining faces are cut by similar method. Without requiring tools and skillfulness that are necessary for marking work, easy and exact U-shaped cutting work can be executed. Further, the square pipe is only once turned and this method is useful for the improvement of workability, space saving of job site or the like.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a square pipe or column material (hereinafter simply referred to as a square pipe) used as a pillar of a steel building structure, and is provided with a U-shaped cut for an anchor bolt. The present invention relates to a cutting jig and a cutting method.

[0002]

2. Description of the Related Art Conventionally, a U-shaped cut is provided in a square pipe by first using a scale or the like on the upper surface of the upper frame of the square pipe placed horizontally on a base (frame). Scaling compatible Scribing up straight lines with a stone brush, chalk, etc., and then scribing an arch-shaped curve for U-shaped cutting through the stone brush, etc. Perform scribing work.

When the scribing work for the U-shaped cut is completed, the straight part is then used with a simple ruler jig, and the arched curved part is freehand for gas cutting (in the present invention, the gas is cut). Other arc cutting etc. are included in the cutting.)
Take

Specifically, gas cutting is performed along the scribe line to form a U-shaped cut similar to the scribe line.

Then, as a final step, the U-shaped cut end surface is sander-finished.

Through the above scribing work, gas cutting, and sanding finishing (may be omitted), the U-shaped cutting work on the upper surface of the upper frame is completed.

Then, subsequently, the U-shaped cutting work of the other frame (referred to as the lower frame or the left and right side frames in the above-mentioned horizontal state) is started. It is difficult to scribble.

Therefore, first, the square pipe is rotated by 90 ° in either direction, the right frame is moved to the upper frame position, and the right frame is regarded as the upper frame.

As a result, the U-shaped cut-out upper frame is moved to the left frame position, the left frame is moved to the lower frame position, and the lower frame is moved to the right frame position. However, it changes about 90 degrees.

Then, on the upper surface of the right frame at the upper frame position, the U-shaped cutting work of the upper surface of the right frame is completed through the scribing work, the gas cutting, and the sanding finish as described above.

After that, the position movement through the above-described rotation of about 90 ° and the subsequent scribing work, gas cutting, and sander finishing are performed, and, for example, the U-shaped cutting work on the upper surface of the lower frame is completed.

Similarly, for example, the final U-shaped notch cutting operation on the upper surface of the left frame is completed.

By repeating the above-mentioned operation or procedure, a U-shaped cutting operation is performed on a large number of square pipes.

[0014]

As described above, there is no suitable jig for marking the square pipe, and it depends on experience and intuition, and there is a demand for a jig that can make accurate marking easily. Is.

Further, in the conventional gas cutting, arch-shaped curve cutting is not beautiful, and post-processing such as sanding is required, resulting in poor workability.

Further, when the U-shaped cut is cut on the four faces of the square pipe by conventional gas cutting or the like, it is necessary to rotate the square pipe at least four times.

Therefore, there is a strong demand for securing a place by rotation and requiring a great deal of labor, and improving it (due to a folded pattern that lacks manpower).

[0018]

In view of the above, the present invention provides
In order to simplify the U-shaped cutting / cutting work, the following constitution was adopted by inventing a jig capable of cutting an accurate U-shaped cutting without scribing work.

That is, the U-shaped cutting jig for the square pipe of the present invention is installed at a predetermined position on the upper surface of each frame of the steel frame building square pipe or the column material horizontally placed on the base, or on the inner surface of each frame. A guide plate having a U-shaped inner end edge for a gas cutting guide, a support means for lifting the guide plate from the upper surface of each frame or the inner surface of each frame, and the guide plate, the upper surface of each frame, or the inner surface of each frame. And a locking means for setting it at a predetermined position.

Further, according to the present invention, the U-shaped cuts of the upper and lower frames of the square pipe are sequentially made in a standing state, and the U-shaped cut of four sides of the square pipe can be performed by one rotation of the square pipe.
For the purpose of speeding up the U-shaped cutting work or reducing the gas usage, the following configuration is adopted.

That is, the U-shaped notch is formed in the square pipe of the present invention by the U-shaped cut on the upper surface of the upper frame or the inner surface of the lower frame of the steel frame building rectangular pipe or the column material which is laid horizontally on the base. Using a marking line or a U-shaped cutting jig for
Gas cutting, respectively, after that, the square pipe for steel frame construction or the column material is rotated about 90 °, one and the other side frames are laid horizontally at the upper frame position and the lower frame position, and subsequently, at the upper and lower frame positions. On the upper surface of one side frame or on the inner surface of the other side frame, using a marking line for U-shaped cutting or a U-shaped cutting jig, respectively, gas cutting, and the U-shaped cutting through the one rotation. A cutting method for forming a.

[0022]

The function of the present invention (use of the jig and cutting method) will be described below.

First, a square pipe is placed horizontally on a base (not shown).

On the opening side of the horizontally arranged square pipe, for example, a guide plate is mounted on the upper surface of the upper frame of the square pipe. At this time, first, a pair of longitudinal positioning stoppers (hereinafter referred to as fixed stoppers). Is abutted against the end face on the opening side, and is positioned with respect to the longitudinal direction of the square pipe of the guide plate (referred to as the diagonal left-right direction in FIG.

After that, in order to install the guide plate at a predetermined position (generally, the central portion in the width direction) in the direction orthogonal to the longitudinal direction of the square pipe (hereinafter referred to as the width direction), the guide is installed. The plate is moved laterally using the fixed stopper (at this time, the lateral positioning stopper "hereinafter, referred to as a sliding stopper" is considered to be in a free state) and moved to the predetermined position. At the stage of doing, install the sliding stopper on the outer surface of the left frame as you face the drawing of the square pipe.
Stop above it and secure this sliding stopper, for example, via a thumbscrew (not limited).

Through the above operation or procedure, the U-shaped cutting jig is installed at a predetermined position on the upper surface of the upper frame.

Further, the fixing of the sliding stopper determines the installation of the inner surface of the lower frame, which will be described later, and the guide plates at predetermined positions on the left and right side frames.

When the U-shaped cutting jig is installed on the upper surface of the upper frame, the guide plate of the U-shaped cutting jig (hereinafter
Simply use it as a guide plate. By moving the nozzle of the cutting jig along the U-shaped inner end edge of), a U-shaped cut is formed on the upper surface of the upper frame.

The U-shaped cut portion cut in this manner is extremely beautiful and, in principle, does not require a sander finish (a result of actual use). The U-shaped cut portion is formed on the upper surface of the upper frame. If you do not rotate the square pipe,
In that state, the U-shaped cutting jig is then installed on the inner surface of the lower frame.

At this time, if there is a welding mark on the inner surface of the lower frame, a protrusion (supporting means, not limited to the protrusion, provided on the lower surface side of the guide plate at this welding mark, a ridge, or another The same applies in the following.) And the fixed stopper is abutted against the opening side edge of the square pipe, and the sliding stopper is attached to the outer surface of the left frame. , This time, it stops below that.

As a result, since the U-shaped cutting jig is installed on the inner surface of the lower frame, the beautiful U-shaped cutting is cut by the same operation or procedure as described above, and at the time of cutting the lower frame, As described above, since the U-shaped cut is already formed in the upper frame, it is easy to handle the cutting jig in the cutting work.

When the U-shaped cuts are formed in the upper and lower frames as described above, the square pipe is rotated for the first time so that the left frame is at the upper frame position and the right frame (in the drawing of the square pipe). , Refers to the side frame on the right side. The same applies hereinafter) to the lower frame position.

By the rotation, the U-shaped cutting jig is first installed on the upper surface of the left frame which has been moved to the upper frame position. At this time, the fixed stopper is stopped at the opening side edge as in the previous time. The sliding stopper stops above the outer surface of the lower frame having the U-shaped cut, which is moved to the left frame position by the rotation.

By the above operation or procedure, the U-shaped cutting jig is installed on the upper surface of the left frame at the upper frame position, and thereafter, gas cutting is performed in the same manner as described above, and the U frame is also cut on the left frame. Make a notch.

Then, a U-shaped cut is formed in the right side frame at the lower frame position, which remains until the end.

At this time, as in the previous case, the square pipe is not rotated and the U-shaped cutting jig is installed on the inner surface of the right side frame in the state as it is.

That is, the fixed stopper is stopped at the opening side edge of the square pipe, and the sliding stopper is stopped at the lower surface of the lower frame at the left side frame position this time, below this.

After that, a U-shaped cutting operation to the lower frame,
Alternatively, a beautiful U-shaped cut is formed in the right side frame through the procedure.

Then, when the U-shaped cutting jig is removed from the right frame, beautiful U-shaped cuts are formed on all the frame surfaces.

The installation position, installation method, gas cutting operation, etc. of the U-shaped cutting jig described above are as follows.
It is an example, and it goes without saying that the description and the examples are not limited thereto.

Further, it is ideal that a U-shaped cutting operation is carried out from the lower frame so that fusing residue is not accumulated.

[0042]

Embodiments of the present invention will be described below with reference to the drawings.

Reference numeral 1 denotes a guide plate having a horseshoe shape in plan view, and has a size that can be inserted into the inner surface 1P of the square pipe P.

The guide plate 1 has a square pipe P and a U
A U-shaped inner end edge 2 for forming a shape cut is provided, and at least one of the base ends thereof is slightly inward,
A stopper mounting arm plate 3 for mounting a sliding stopper, which will be described later, is provided extending in a right angle direction.

The U-shaped inner edge 2 of the guide plate 1 is a straight edge 2a, 2a which are normally arranged in parallel, and this straight edge 2
It is formed with an arch-shaped curved edge 2b connecting a and 2a.

Several sizes of the guide plate 1 are formed depending on the size of the square pipe P.

The shape of the outer edge 2c is also free, but for example, an arch shape as shown in the drawing is useful in handling.

Numerals 4 and 4 are a pair of fixed stoppers (not limited to a pair) which are slightly inward of the base end of the guide plate 1 and hang vertically from the back surface of the guide plate 1. , 4 are abutted (contacted, the same applies hereinafter) to the end surface 2P on the opening side of the square pipe P, and the installation position in the longitudinal direction of the square pipe P of this guide plate 1, for example, on the upper surface 1P ′ of the upper frame 3P is determined. (The same applies to the inner surface of the lower frame, which will be described later.).

A slidable stopper 6 is hung on the stopper mounting arm plate 3 via a tightening means such as a thumbscrew 5 inserted in an elongated hole 13 provided therein, and the sliding stopper 6 is suspended. The dynamic stopper 6 is configured to be slidable (moving) in the elongated hole 13 and adjusting the thumbscrew 5 at a distance substantially parallel to the straight edge 2 a of the guide plate 1. ..

Then, the sliding stopper 6 is stopped at the opening side of the square pipe P and above the outer surface of the left frame 4P of the square pipe P, and the above-mentioned upper portion of the square pipe P of the guide plate 1 is stopped. An installation position in the width direction on the frame upper surface 3P is determined.

Therefore, the fixed stoppers 4, 4
And, through the sliding stopper 6, with the square pipe P,
In addition, the installation position of the guide plate 1 is determined on the upper surface 1P ′ of the upper frame 3P.

After the installation position is determined in this manner, the inner surface 1P of the other lower frame 5P, the upper surface 1P 'of the left frame 4P (or the upper surface 1P' of the right frame 5P) is subjected to the same operation or procedure. The installation position of the guide plate 1 on the inner surface 1P of the right frame 6P (or the inner surface 1P of the left frame 4P) is determined.

The sliding stopper 6 is, for example, the lower frame 5.
When the guide plate 1 is installed on the inner surface 1P of P, it is stopped below the outer surface of the left frame 4P, and the square pipe P is rotated (the state rotated clockwise by 90 ° in FIG. 3). The guide plate 1 on the upper surface 1P 'of the left frame 4P.
Is installed, the lower frame 5P moved to the left frame position
When the guide plate 1 is installed on the inner surface 1P of the right side frame 6P in the state where the guide plate 1 is mounted on the inner surface 1P of the right side frame 6P while being further rotated, it is stopped below the outer surface of the lower frame 5P moved to the left side frame position. It is configured to be.

Further, the sliding stopper 6 unscrews the thumbscrew 5 screwed to the bent flat portion 6a to release the tightness between the stopper mounting arm plate 3 and the sliding stopper 6.

As a result, the thumbscrew 5 screwed to the bent flat surface portion 6a of the sliding stopper 6 can move along the long hole 13 together with the sliding stopper 6.

Therefore, when the sliding stopper 6 is moved to an appropriate position, the thumbscrew 5 is screwed in, so that the sliding stopper 6 is fixed at this moving position.

Through the transition of the sliding stopper 6 described above, for example, the position of the guide plate 1 is changed to the square pipe P.
It is used to move in correspondence with the widthwise dimension of the rectangular pipe, or to change the formation position of the U-shaped notch A in the widthwise direction of the square pipe P.

A protrusion 7 as a supporting means is provided on the lower surface of the guide plate 1, and the protrusion 7 is used to insert
The guide plate 1 is detached from each upper surface 1P ′ and each inner surface 1P of the square pipe P so that a nozzle (tip) N of a welding device can be attached to the U-shaped inner end edge 2 of the guide plate 1. , Or when installing the guide plate 1 on each inner surface 1P,
This is because the sliding type stoppers 6 hit the upper and lower sides of each outer surface for reliable positioning, or to achieve efficient contact between the arc and the square pipe P.

The projection 7 is constructed so as not to be hit by the welding trace B provided on the square pipe P. For example, the protrusion 7 is provided except for the welding mark B, or the protrusion 7 is provided with a cut.

The protrusion 7 is an example, and may be in the form of a ridge, a protrusion or the like. Further, various forms and structures such as a magnet or an anti-slip system may be considered.

In the figure, 8 is a clamp tool such as a toggle clamp,
Reference numeral 9 is a notch for facilitating attachment of the clamp tool 8.

The cutting method of the present invention has been described above in connection with the method of using the U-shaped cutting jig because of the above-mentioned operation, and the description thereof will be omitted.

Also, by using the scribing lines, the upper and lower frames 3 at a time
When the U-shaped cuts A are formed in the P, 5P or the left and right frames 4P, 6P, respectively, substantially the same cutting method is adopted.

[0064]

As described in detail above, the present invention has a constitution for forming a U-shaped cut using a U-shaped cutting jig installed at a predetermined position on the opening side of a square pipe. Have.

(1) As in the conventional case, an accurate U-shaped cut is formed without performing a scoring operation.

(2) It is possible to easily perform U-shaped notching work without requiring any equipment and skill required for scoring work.

(3) On each upper surface or each inner surface of the square pipe,
The U-shaped cutting jig of the present invention can be installed reliably and stably.

(4) U-shaped inner edge of U-shaped cutting jig,
A standardized U-shaped cut of similar shape is formed.

Further, according to the present invention, the first U-shaped notch forming operation is performed, for example, in each of the upper frame and the lower frame, and then the square pipe is rotated to perform the second U-shaped notch forming operation. For example, the cutting method is performed in the right frame and the left frame, and has the following effects.

(5) The square pipe need only be rotated once, which is useful for improving workability and saving space at the work site.

(6) Useful for simplification of work and energy saving (reduction of gas usage).

(7) Helps to reduce work cost.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state in which a square pipe is installed on a top surface of an upper frame.

FIG. 2 is a plan view of FIG.

FIG. 3 is a schematic front view showing a state in which a guide plate is fixed to the opening side end of the square pipe.

FIG. 4 is an enlarged schematic front view showing a state in which a guide plate is fixed to the opening side end of the square pipe.

FIG. 5 is an enlarged plan view of a U-shaped cutting jig.

[Explanation of sign]

 1 Guide plate 2 U-shaped inner end edge 2a Straight end face 2b Arched curved end face 2P Open end face 3 Stopper mounting arm plate 4 Fixed stopper 5 Thumb screw 6 Sliding stopper 6a Bent flat surface 7 Protrusion 8 Clamping tool 9 Cut Notch P Square pipe 1P Inner surface 1P 'Upper surface 3P Upper frame 4P Left frame 5P Lower frame 6P Right frame A U-shaped notch B Welding trace N Nozzle (tip)

Claims (4)

[Claims] 1. A guide provided with a U-shaped inner end edge for a gas cutting guide, which is installed at a predetermined position on the upper surface of each frame of a column material of a steel frame or column material laid horizontally on a base or on the inner surface of each frame. A plate, a support means for lifting the guide plate from the upper surface of each frame or an inner surface of each frame, and a locking means for installing the guide plate at a predetermined position on the upper surface of each frame or an inner surface of each frame, U-shaped cutting jig for steel-structured square pipes or column materials. 2. The locking means according to claim 1, wherein a pair of stoppers for a steel frame building square pipe or column member that is stopped at the end face on the opening side, and the square pipe or one of the column members in the opening direction. The U-shaped cutting jig for steel frame building square pipe or column material according to claim 1, which is composed of a stopper that is stopped by the side frame. 3. The U-shaped cutting jig for steel frame building square pipe or column material according to claim 1, wherein the stopper that is stopped by the one side frame is configured to be movable. 4. A square pipe for steel frame construction laid horizontally on a base, or a scribe line for U-shaped cutting or a U-shaped cutting jig on the upper surface of the upper frame of the column material or the inner surface of the lower frame. , Gas cutting each, and then 90 ° angle of square pipe or column material for steel construction
Rotate about one degree, place one and the other side frame horizontally at the upper frame position and the lower frame position, and then make a U-shaped notch on the upper surface of one side frame at the upper and lower frame positions or the inner surface of the other side frame. A cutting method in which a gutter wire or a U-shaped cutting jig is used to perform gas cutting, and a U-shaped cut is formed in a square pipe for building a steel frame or a column material through the one rotation.