JPH09165921A - Method, device and jig for positoning steel-frame opening section - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the generation of an impulse sound at the time of interconnection at the time of the setup operation of a steel frame, and to ensure the safety of operation and obviate the generation of noise public nuisance. SOLUTION: When the through-holes 4, 5 of a bolt 12 for surface connection between a steel-framed column 1 and a steel-framed beam 3 are positioned mutually, a positioning jig 6, which has approximately the same diameter as the diameters of the through-holes 4, 5 and in which the diameter of a front end section 7 is shrunk, is inserted into temporarily positioned each through-hole 4, 5, and the front end section 7 of the temporarily penetrated positioning jig 6 is coupled at the front end of a hydraulically operated traction cylinder rod 11 in each through-hole 4, 5, and pulled forcibly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a positioning method, a positioning device, and a positioning method for mutually positioning the through holes of the connecting bolts formed in each steel frame when the steel frames are surface-bonded to each other. It relates to a matching jig.

[Prior art]

As is well known, upon building a building, steel columns are erected after foundation work, and steel beams are erected and connected between the respective steel columns. Further, the assembly of steel frames is not limited to building construction, but is often performed in bridges and other structures.

For example, as shown in FIG. 11, for example, as shown in FIG. 11, the steel frame columns and the steel beams are welded to each other by welding a flat plate-like bracket 2 integrally provided on the steel frame column 1 and a steel frame beam 3 having an H-shaped structure. The bracket 2 has a large number of through holes 4,
A large number of through holes 5 are opened in predetermined portions of the steel beam 3, and a means is employed in which the through holes 4 and 5 are aligned, bolts are inserted, nuts are fixed, and then welded.

In this case, the arrangement pitches of the large number of through holes 4 and 5 formed in the bracket 2 and the steel beam 3 are of course the same, and the erection connection between the steel column 1 and the steel beam 3 is
First, it is performed by aligning the plurality of through holes 4 and 5 with each other.

The steel beam 3 is suspended from the steel column 1 which is erected, for example, by a crane, and the bracket 2 of the steel column 1 is suspended.
The through holes 4 and 5 are further roughly aligned by aligning with the predetermined portion of the steel beam 3, and the through holes 4 and 5 are positioned with such an accuracy that the bolt can penetrate at least between them. Matching is necessary.

When the steel beam 3 is lightweight, it is relatively easy to align the through holes 4 and 5 with each other, but in a large-scale building such as a high-rise building, one steel beam 3 is used. Since it will be several tons, alignment with the through holes 4, 5 of the bracket suspended by a crane is only an outline,
As shown in FIG. 12, the through holes 4 and 5 facing each other are misaligned with each other, and it is difficult to align the bolts with an accuracy that allows at least penetration.

Therefore, conventionally, in the state where the steel beam is suspended by the crane as described above and the through holes are substantially aligned with each other, the tapered metal has a diameter substantially the same as the diameter of the through holes. Temporarily insert a rod jig (usually called an "arrow") into the through hole, and then manually hit the rear end of the metal rod jig with a large hammer to correct misalignment between the misaligned through holes. To do.

[0008]

However, as described above, since the weight of the steel frame beam is extremely heavy, even if an error of only a few millimeters is corrected, a large force is required to hit the jig, and this large hammer is required. A large impact sound, which is a metallic sound that resonates in the steel frame when hit by, was emitted.

[0009] From the past, this alignment has always been to such a primitive striking work, and despite the impact noise being a major noise pollution problem at the construction site, no measures have been taken. I wasn't there. Further, since it is a manual work, it is inefficient and is a dangerous work at a high place.

The present invention was developed in order to solve the above-mentioned drawbacks, inconveniences, and problems of the prior art, and it is technically necessary to prevent the generation of impact noise during interconnection during steel frame assembly work. It is an object of the present invention to secure work safety and prevent noise pollution.

[0011]

In order to solve the above-mentioned problems, the method of aligning the openings of the steel frame of the present invention according to claim 1 is a method of mutually aligning the through holes of the surface-bonding bolts of the steel frames. In addition, a positioning jig having a diameter substantially the same as the diameter of the through hole and having a reduced tip portion is inserted into each of the provisionally aligned through holes to provisionally penetrate each of the through holes. It is characterized by forcibly pulling the tip end of the positioning jig.

Therefore, since the positioning jig has a diameter substantially the same as the diameter of the through hole and the tip portion is reduced in diameter, each of the positioning jigs is opened in order to penetrate the surface joining bolts between the steel frames. If the positioning jig is inserted from one direction into each of the through-holes that are temporarily aligned to face each other and the through-holes are provisionally penetrated, the tip end of the through-hole is projected to the other end. You can

Therefore, if this tip portion is forcibly pulled,
As a result of the displacement of each through hole, the part that is narrower than the original opening diameter is pushed against the weight of the steel frame by the reduced diameter part peripheral surface of the tip of the alignment jig abutting and expanding. Therefore, the portion of the positioning jig having a diameter substantially the same as the diameter of the through hole can accurately penetrate into each through hole, and the centers of the through holes can be aligned.

Since a large number of through-holes can be aligned by performing this alignment at some of the through-holes that are provided in a predetermined portion of each steel frame at the same arrangement pitch, the positions can be aligned. It is possible to fix the nuts through the through-holes where accurate alignment is achieved even though the alignment jig is not inserted.After that, remove the alignment jig, and then attach the bolts to the relevant parts. Will be inserted.

To remove the positioning jig, simply pull the jig further in the pulling direction. That is, in the conventional hitting means, the hit end of the jig is deformed by hitting and the through hole cannot be penetrated. Since it is not deformed by hitting, it can be pulled out in the same direction as it is.

Next, a steel frame opening alignment device according to a second aspect of the present invention is a device for mutually aligning the through holes of the surface joining bolts of the steel frames with each other, and has a diameter substantially equal to the diameter of the through holes. A positioning jig having the same diameter and a reduced tip is inserted into each of the provisionally aligned through-holes. It is characterized by connecting the tip of the traction cylinder rod that operates.

Therefore, it is possible to forcibly pull the tip of the positioning jig by the pulling cylinder rod, and the pulling cylinder rod is hydraulically operated.
The operation is reliable and produces no noise, let alone impact noise.

The jig for aligning the steel frame opening of the present invention according to claim 3 is a jig for mutually aligning the through holes of the surface joining bolts of the steel frames with each other. It is characterized in that a locking portion that is connected to the tip of a hydraulically actuated traction cylinder rod is provided at the tip of the positioning jig that has substantially the same diameter and has a reduced diameter.

Therefore, the tip of the positioning jig and the tip of the pulling cylinder rod can be reliably connected, and the tip of the positioning jig can be forcibly pulled.

Further, the steel frame opening alignment device of the present invention according to claim 4 is a device for mutually aligning the through holes of the surface joining bolts of the steel frames with each other, and has a diameter substantially the same as the diameter of the through holes. A positioning jig having a diameter and a reduced tip is inserted into each of the provisionally aligned through-holes, and hydraulically operated to the rear end of the alignment jig that temporarily penetrates each through-hole. It is characterized in that the tip of the pressing cylinder rod abuts.

Therefore, if the pressing cylinder rod is hydraulically operated to move forward to press the rear end of the positioning jig which has tentatively penetrated each through hole, the jig is pierced through each through hole reliably and without noise. Can be made.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described together with a positioning method based on the drawings of a positioning device. First, in FIG. 1, an end portion of an H-shaped steel frame beam 3 suspended by, for example, a crane is roughly aligned with a flat plate-shaped bracket 2 that is integrally provided on a steel frame column 1 to make a face-to-face contact.

A large number of through holes 4 are formed in the bracket 2 and a large number of through holes 5 are formed at the ends of the steel beam 3 at the same arrangement pitch. However, as mentioned above, the steel beam is extremely heavy. 3 is only suspended by a crane and roughly aligned, so that the brackets 2 facing each other
A slight misalignment is formed between the through hole 4 and the through hole 5 of the steel beam 3.

In the drawings, reference numeral 6 is a positioning jig using a metal rod. The positioning jig 6 has a diameter substantially the same as the diameter of the through holes 4 and 5, and the tip portion 7 is reduced in diameter. The front end portion 7 is provided with a locking portion 8.

In FIG. 1, when the tip portion 7 of the positioning jig 6 is inserted from the side of the through hole 5 of the steel beam 3, the tip portion 7 has a reduced diameter, so that the through hole 5 is smoothly formed. And then into the through hole 4 of the bracket 2.

In FIG. 2 in which the tip portion 7 of the positioning jig 6 has temporarily entered the through hole 5 and the through hole 4 in this way, a hydraulically operated traction cylinder 9 is arranged on the surface opposite to the bracket 2 side. .

The traction cylinder 9 is integrally provided with a leg cylinder 10 of a predetermined length at its tip, and a cylinder rod 11 is moved forward and backward in the leg cylinder 10 by hydraulic pressure.
If the hydraulic operation is performed only when pulling and retracting, and the forward returning operation is performed by using a spring or the like, the structure of the pulling cylinder 9 can be simplified), the tip of the cylinder rod 11 and the bracket protruding from the leg cylinder 10. The engagement portion 8 of the tip end portion 7 of the positioning jig 6 protruding from the through hole 4 of 2 is coupled and engaged, and the tip end surface of the leg cylinder 10 is brought into contact with the bracket 2 surface.

In this state, when the towing cylinder 9 is hydraulically operated to retract the cylinder rod 11, the positioning jig 6 is also towed accordingly. However, since the tip end portion 7 of the positioning jig 6 has a reduced diameter and the peripheral surface is tapered, the original opening diameter between the through holes 4 and 5 which are slightly displaced from each other. The peripheral portion of the diameter-reduced portion of the tip end portion 7 abuts the portion narrower than that, and pushes and spreads against the weight of the steel beam 3.

Therefore, as a result of the position adjustment jig 6 being pulled, the base end portion of the position adjustment jig 6 having a diameter substantially the same as the diameter of the through holes 4 and 5 as shown in FIG. 4,5
It is possible to penetrate the inside and make the centers of both through holes 4, 5 coincide with each other.

In this way, if the alignment jig 6 is used to align some of the many through holes 4 and 5 facing each other, all the other through holes 4 and 5 can also be aligned. Since it is achieved, the fastening by the bolt 12 and the nut 13 is easily performed.

Various structures are conceivable for the connecting and locking form of the above-mentioned tip of the cylinder rod 11 and the locking portion 8 of the distal end portion 7 of the positioning jig 6, and for example, FIG. (B) is a fitting structure, and (c) is a penetrating structure by the pin 14.

The above-mentioned apparatus and method means are intended to forcibly pull the positioning jig 6 by using the pulling cylinder 9, and have great advantages such as no noise and good operability. However, if the steel beam 3 is relatively lightweight, the means shown in FIGS. 5 to 7 is sufficient without using the traction cylinder 9.

That is, a long threaded rod 15 is integrally extended at the tip of the positioning jig 6, and the proximal end plate 16 of the leg cylinder 10 whose tip end surface is brought into contact with the surface of the bracket 2 is attached to the threaded rod 15. It penetrates and the traction nut 17 is screwed.

Therefore, as shown in FIG. 5, the threaded rod 15 is inserted into the through hole 4 and the through hole 5 in which a slight positional deviation is formed, and further inserted into the leg cylinder 10 to screw the traction nut 17 into it. Then, if the traction nut 17 is rotated manually or by using a predetermined device, the through hole 4 and the through hole 5 as shown in FIG.
It is possible to pull out as shown in FIG. 7 by the proximal end portion of the positioning jig 6 entering while correcting the positional deviation of No. 2 and further rotation of the traction nut 17.

[0035]

8 to 10 show still another embodiment of the positioning jig 6, which is composed of a rod member 6a and an auxiliary member 6b.

The rod member 6a has a shape in which the above-mentioned positioning jig 6 is divided in half along the axial direction and has a semicircular cross section, but the diameter of the base end portion is equal to that of the through holes 4 and 5. A locking portion 8 is provided at the tip of the tip portion 7 having a diameter that is substantially equal to the diameter of the tip portion 7.

On the other hand, the auxiliary member 6b has a semicircular cross section in which only the base end portion of the above-mentioned positioning jig 6 is divided in half along the axial direction. 5, a semicircular collar 18 is provided at the base end of the collar.

Therefore, when the flat surface of the auxiliary member 6b is superposed on the flat surface of the base end portion of the rod member 6a, it has a cylindrical shape, and its diameter is substantially equal to the diameter of the through holes 4 and 5.

Therefore, the locking portion 8 of the rod member 6a is connected and locked to the tip of the cylinder rod 11 of the pulling cylinder 9 described above, and the through holes 4 and 5 facing each other with a slight displacement.
The rod member 6a is inserted from the direction of the bracket 2 with the base end being the tip, and is projected to the opposite side of the steel beam 3.

In this state, in the void portion of the through hole 5 of the steel beam 3 at the base end portion of the rod member 6a (the tip end portion 7 of the rod member 6a).
Since this is a reduced diameter, a sufficiently wide space is formed), and the auxiliary member 6b is connected to the steel beam 3 by the collar portion 18.
The rod member 6a is pulled when it is inserted until it abuts against the surface and the cylinder rod 11 is retracted by hydraulic operation.

Since the tip end portion 7 of the rod member 6a is tapered, the through hole 4 and the through hole 5 which are slightly displaced from each other are pulled between the through holes 4 and 5 in the same manner as in the case of the above-described embodiment due to the pulling. The peripheral portion of the reduced diameter portion of the tip portion 7 abuts and expands the portion that is narrower than the original opening diameter of the rod 7, so that the rod member 6a, together with the auxiliary member 6b, is located at the center of both through holes 4 and 5. Can be entered until they match (see FIG. 9).

When the alignment work is completed, the rod member 6
It is sufficient to pull a further out of the bracket 2 side,
Conversely, the auxiliary member 6b may be pulled out from the steel beam 3 side.

In the above-mentioned embodiment, when the work is completed, the positioning jig 6 is removed from the cylinder rod 11, and is inserted from the opposite side in the next work, and is mounted on the cylinder rod 11 again. In the embodiment, the rod member 6
It is possible to save the trouble of removing a from the cylinder rod 11.

[0044]

As described above, according to the method for aligning the opening of the steel frame, the aligning device and the aligning jig according to the present invention, when the surface joining of the steel frames is performed, the connecting bolts opened in the respective steel frames can be used. When the through holes are aligned with each other, the positioning jig can be smoothly and safely inserted into the misaligned through holes without generating an impact noise, and a great number of excellent operational effects can be obtained. Play.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an embodiment of the apparatus of the present invention before work.

2 is a cross-sectional view during the alignment operation of FIG.

FIG. 3 is a cross-sectional view after completion of alignment in FIG.

FIG. 4 is a cross-sectional view showing a connecting and locking form of a cylinder rod and a positioning jig.

FIG. 5 is a sectional view showing a state before work according to another embodiment of the present invention.

6 is a cross-sectional view during the alignment operation of FIG.

FIG. 7 is a cross-sectional view when the alignment of FIG. 5 is completed.

FIG. 8 is a side view showing another embodiment of the positioning jig.

9 is a cross-sectional view of a state in which the alignment jig of FIG. 8 is inserted.

FIG. 10 is a perspective view of FIG. 8;

FIG. 11 is a perspective view showing a connecting portion between a steel frame column and a steel frame beam.

FIG. 12 is an explanatory diagram showing a positional deviation state of through holes formed in each of the steel frame column and the steel frame beam.

[Explanation of symbols]

1; Steel column, 2; Bracket, 3; Steel beam, 4; Bracket through hole, 5; Steel beam through hole, 6; Alignment jig, 6a; Rod member, 6b; Auxiliary member, 7; Reduced diameter Tip,
8; Locking part, 9; Traction cylinder, 10; Leg cylinder, 11;
Traction cylinder rod, 12; bolt, 13; nut,
14; Pin, 15; Threaded rod, 16; End plate, 17; Traction nut, 18; Collar part.

Claims (4)

[Claims] 1. A method of mutually aligning through holes of a surface-bonding bolt between steel frames, the alignment jig having a diameter substantially the same as the diameter of the through holes and having a reduced tip portion. Is inserted into each of the provisionally aligned through holes, and the tip of the alignment jig that has penetrated through each of the through holes is forcibly pulled. 2. A device for mutually aligning through holes of bolts for surface-bonding steel frames to each other, which has a diameter substantially the same as the diameter of the through holes and has a tip end reduced in diameter. Is inserted into each of the through holes that have been temporarily aligned, and the tip of the hydraulically operated traction cylinder rod is connected to the tip of the positioning jig that has temporarily penetrated through each of the through holes. Alignment device. 3. A jig for mutually aligning through holes of bolts for surface-bonding steel frames with each other, the jig having a diameter substantially the same as the diameter of the through holes and having a reduced tip portion. A jig for aligning an opening of a steel frame, wherein a locking portion for connecting with a tip of a hydraulically operated towing cylinder rod is provided at a tip portion of the tool. 4. A device for mutually aligning through holes of bolts for surface-joining steel frames, the alignment jig having a diameter substantially the same as the diameter of the through holes and having a reduced tip portion. Is inserted into each of the through holes that have been temporarily aligned, and the tip of the hydraulically operated pressing cylinder rod is brought into contact with the rear end of the alignment jig that has temporarily penetrated through each of the through holes. Position alignment device.