JP2021063386A - Lifting device of steel frame - Google Patents

Abstract

To provide a lifting device of a steel frame capable of carrying out high-work of separating a suspending jig and the steel frame with safe light work and lowering the height of a receiving piece welded to the steel frame, when assembling the steel frame at a site.SOLUTION: A lifting device of a steel frame configures a suspending jig TJ with a suspending piece 2 which includes a fitting groove KM fitted to a receiving piece 1, a doubling plate 4 for supporting one face of the suspending piece 2, a fixing plate 5 fitted into the suspending piece 2 from an upward direction within a fixed fitting groove KM 6B opened extending upward from a lower part, a pressing plate 3A for supporting the other face of the suspending piece 2, a bolt B inserted into a hole opened at the doubling plate 4, the suspending piece 2, and the pressing plate 3A, and a nut B for fastening in a state where the bolt B is inserted. The nut N is fastened after coupling the receiving piece 1 welded to a steel frame G and the suspending piece 2 of the suspending jig TJ to fix the receiving piece 1 and the suspending jig TJ.SELECTED DRAWING: Figure 1

Description

The present invention relates to a steel frame lifting device used for lifting a steel frame at a construction site or the like.

At the construction site, steel frames such as steel frames for columns and beams are lifted and installed at predetermined positions when assembling the steel frames. Therefore, as shown in FIGS. 13 and 14, these steel frames G are used in factories and the like. The suspension piece 22 is fixed by welding WD, and at the site, a construction method in which a shackle pin SP is inserted through the suspension hole 22A of the suspension piece 22 and a steel frame is lifted and assembled by a crane or the like via a suspension wire TW is generally used. It has been implemented (see the "Explanation of Conventional Techniques" column of Patent Document 1). However, the work of separating the hanging piece 22 and the steel frame G is an unstable work at a high place of the scaffolding, and for example, a large shackle SC is large and heavy, and the risk of the separation work is increased.

On the other hand, in order to sufficiently secure the shackle assembly workability for the hanging piece, the height of the hanging piece protruding from the steel frame is generally set to, for example, 100 to 150 mm, whereby the screw hole of the shackle and the hanging piece of the hanging piece are set. It is configured so that the shackle pin can be easily attached to the hanging hole and the shackle pin can be easily fastened with a box wrench or the like. The thickness of the hanging piece depends on the hanging load, but most of them have a thickness of 9 to 16 mm, and generally, there is a hanging piece having a thickness of 16 mm and hanging 10 tons.

Japanese Unexamined Patent Publication No. 2001-317209

However, when the hanging piece is greatly projected from the steel frame in this way, the shackle can be attached to and removed from the hanging piece better, but other structural materials and floor finishes to be retrofitted to the steel frame are welded to the steel frame. May interfere with the hanging piece. In this case, it is necessary to cut off the interference portion in order to avoid the interference. For example, in building construction, when a slab is formed on the floor or roof surface with a deck plate, the minimum thickness of the slab is set to 80 mm or more according to the Building Standards Act. Alternatively, even if the slab thickness is 100 mm, if the protruding height of the hanging piece from the steel frame is 100 mm, the concrete cover thickness cannot be secured, so that the slab cannot be finished unless the hanging piece is cut.

According to the Building Standards Law, the cover thickness of concrete slabs is 30 mm or more. For example, if the minimum slab thickness is 80 mm, the height will be 50 mm if the cover thickness of 30 mm is secured, and if it is higher than that, the building standard will not be satisfied. Become.

In addition, in the steel frame of the hut that supports the roof of a factory warehouse, the main part of the joint between the pillar and the beam is the bolt joint, and the protrusion of the bolt part becomes an obstacle to cover the base of the roofing material and interferes with the bolt part. To prevent this, lip grooved steel or the like is welded and fixed on the steel beam, and these roof base materials are placed on the lip grooved steel. Generally, a lip grooved steel having a height of 50 mm is used. Therefore, if a hanging piece having a height of 100 to 150 mm is used, the upper part of the hanging piece protrudes upward from the lip grooved steel. , It is still necessary to cut off the hanging piece. However, since this excision work is a work at a high place where the scaffolding is poor, it is a dangerous work such as a worker's safety and poor workability, which is a heavy burden.

As described above, when the height of the hanging piece exceeds 50 mm, it interferes with the roof base material and the roof base material cannot be covered. Further, the limit of the minimum height is 45 mm, and if it is lower than this, the volume of the steel material at the fitting portion becomes insufficient, and due to the nature of the steel, the dimensions become severe to receive the suspension load, and the load cannot be transmitted well.

As explained above, there have been many opinions that a hanging tool that is safe and does not require cutting processing is desired when assembling a steel frame at a construction site, but none has been developed with a simple mechanism.

Therefore, according to the present invention, when assembling a steel frame in the field, the hanging jig and the steel frame can be separated from each other with a safe and light work even in high-altitude work, and the height of the receiving piece to be welded to the steel frame is kept low, and the steel frame is retrofitted. It is an object of the present invention to provide a steel frame lifting device in which other structural materials and floor finishes are not interfered with a hanging jig.

In order to solve the above problems, the first invention is a steel frame lifting device used for lifting a steel frame at a construction site or the like.
It is characterized by being composed of a receiving piece welded to the steel frame and a hanging jig for lifting the steel frame via a hanging wire by a crane or the like that is detachably connected to the receiving piece and connected to a shackle. And.

The second invention is a steel frame lifting device used for lifting a steel frame at a construction site or the like.
It is provided with a receiving piece to be welded to the steel frame and a hanging jig for lifting the steel frame via a hanging wire by a crane or the like that is detachably connected to the receiving piece and connected to a shackle.
The hanging jig is characterized in that the connection with the receiving piece can be released while the hanging jig is still connected to the shackle.

The third invention is a steel frame lifting device used for lifting a steel frame at a construction site or the like.
It is provided with a receiving piece to be welded to the steel frame and a hanging jig for lifting the steel frame via a hanging wire by a crane or the like that is detachably connected to the receiving piece and connected to a shackle.
A hanging piece having a fitting groove for fitting the hanging jig to the receiving piece, a supporting plate for supporting one surface of the hanging piece, and a fixing provided extending upward from the lower portion thereof. A fixing plate that fits the hanging piece from above in the fitting groove, a holding plate for supporting the other surface of the hanging piece, and the attachment plate, the hanging piece, and the holding plate are provided. It consists of a bolt that is inserted into the hole and a nut that is tightened with the bolt inserted.
It is characterized in that the receiving piece and the hanging jig are fixed by tightening the nut after connecting the receiving piece welded to the steel frame and the hanging piece of the hanging jig.

The fourth invention is a steel frame lifting device used for lifting a steel frame at a construction site or the like.
It is provided with a receiving piece to be welded to the steel frame and a hanging jig for lifting the steel frame via a hanging wire by a crane or the like that is detachably connected to the receiving piece and connected to a shackle.
A hanging piece having a fitting groove for fitting the hanging jig to the receiving piece, a supporting plate for supporting one surface of the hanging piece, and a fixing provided extending upward from the lower portion thereof. To support the fixing plate that fits the suspension piece from above in the fitting groove, and the other surface of the suspension piece in a state where the suspension piece, the attachment plate, and the fixing plate are fixed by welding. It is composed of a holding plate, a supporting plate, a hanging piece, a bolt to be inserted into a hole formed in the holding plate, and a nut for tightening with the bolt inserted.
It is characterized in that the receiving piece and the hanging jig are fixed by tightening the nut after connecting the receiving piece welded to the steel frame and the hanging piece of the hanging jig.

A fifth invention is a steel frame lifting device used for lifting a steel frame at a construction site or the like.
It is provided with a receiving piece to be welded to the steel frame and a hanging jig for lifting the steel frame via a hanging wire by a crane or the like that is detachably connected to the receiving piece and connected to a shackle.
A hanging piece having a fitting groove for fitting the hanging jig to the receiving piece, a supporting plate for supporting one surface of the hanging piece, and a fixing provided extending upward from the lower portion thereof. To support the fixing plate that fits the suspension piece from above in the fitting groove, and the other surface of the suspension piece in a state where the suspension piece, the attachment plate, and the fixing plate are fixed by welding. It is composed of a holding plate, a supporting plate, a hanging piece, a bolt to be inserted into a hole formed in the holding plate, and a nut for tightening with the bolt inserted.
The hanging piece of the hanging jig with the nut attached to the bolt so that the distance between the holding plate and the attached plate is at least twice the thickness of the receiving piece 1 is welded to the steel frame. After connecting to the receiving piece, the receiving piece and the hanging jig are fixed by tightening the nut.

A sixth aspect of the present invention is the lower end of the attachment plate and the lower end of the holding plate located on both side surfaces of the hanging piece when the receiving piece and the hanging jig are connected in the third to fifth inventions. Is characterized in that it is positioned upward so as to avoid a bead of welding between the steel frame and the receiving piece.

In the third to fifth inventions, the seventh invention prevents the nut from falling after the bolt has inserted the attachment plate, the suspension piece, and the holding plate, and then fitted the nut. It is characterized in that a bolt pin for using the bolt is attached to the bolt.

The eighth invention is characterized in that, in the third to fifth inventions, the height of the hanging piece is 45 mm or more and 50 mm or less.

Therefore, according to the present invention, when assembling a steel frame in the field, the hanging jig and the steel frame can be separated from each other with a safe and light work even in high-altitude work, and the height of the receiving piece to be welded to the steel frame is kept low, and the steel frame is retrofitted. It is possible to provide a steel lifting device in which other structural materials and floor finishes are not interfered with the hanging jig.

It is a front view of the steel frame weighting device. FIG. 1 is a view of FIG. 1 from above. It is a right side view of FIG. It is a front view of the suspension jig before connecting the receiving piece and the suspension jig, in which the suspension piece is integrated with the fixing plate in a state of being sandwiched between the attachment plate and the spacer. It is a front view of the receiving piece which constitutes a hanging jig. It is a front view of the hanging piece constituting a hanging jig. It is a front view of the holding plate and a spacer which make up a hanging jig. It is a front view of the attachment plate which constitutes a hanging jig. It is a front view of one of the fixing plates constituting a hanging jig. In the cross-sectional view taken along the line XX of FIG. 1, (a) shows before fitting the receiving piece, and (b) shows after fitting. It is a figure which shows the use example of the steel frame lifting apparatus of this invention. It is a state explanatory diagram when a steel frame is erected from the ground. It is a figure which shows the conventional hanging metal fitting, (c) is a front view, (d) is a side view. It is a state explanatory view of the conventional example when a steel frame is erected from the ground.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, FIG. 1 is a front view of a steel frame lifting device according to an embodiment of the present invention, in which a receiving piece 1 welded to a steel frame G such as a steel frame for a column or a steel frame for a beam and a hanging piece 2 are fitted together. , This fitted state is restrained by the holding plate 3A, the spacer 3B, the attachment plate 4, the pair of fixing plates 5, 5, the bolt B, and the nut N. FIG. 2 is a state in which the steel frame lifting device shown in FIG. 1 is viewed from above, and FIG. 3 is a right side view of the steel frame lifting device shown in FIG. The receiving piece 1, the hanging piece 2, the holding plate 3A, the spacer 3B, the supporting plate 4, and the pair of fixing plates 5 and 5 are all made of flat plates made of steel.

The basic mechanism for lifting the steel frame G is composed of the receiving piece 1 welded to the steel frame G and the hanging jig TJ on the hanging side, and the receiving piece 1 and the hanging jig TJ are detached from each other. It is possible. The hanging jig TJ is composed of the hanging piece 2, the holding plate 3A, the spacer 3B, the attachment plate 4, the pair of fixing plates 5, 5, the bolt B, and the nut N. That is, the suspension piece 2 constitutes the suspension jig TJ together with other members, that is, the holding plate 3A, the spacer 3B, the attachment plate 4, and the pair of the fixing plates 5, 5, and the suspension jig TJ and the above. The receiving piece 1 is divided into upper and lower parts and can be connected or separated to form a detachable steel frame jig.

As shown in FIGS. 5 and 6, the receiving piece 1 and the main hanging piece 2 of the hanging jig TJ are formed with fitting portions that are fitted to each other, and will be described in detail below.

That is, as shown in FIG. 5, the receiving piece 1 is made of a steel material, has an uneven outer shape, and has a thickness of 12 mm. The receiving piece 1 has an uneven shape, and two fitting portions 1A and 1B, three fitting portions 1C, 1D, and 1E, and one horizontally long fitting portion 1F are formed. .. Further, as shown in FIG. 6, the suspension piece 2 is made of a steel material, has a thickness of 12 mm, and a fitting groove KM into which the receiving piece 1 is fitted is formed in the lower portion. That is, the hanging piece 2 has a fitted portion 2A to which the fitting portion 1A of the receiving piece 1 fits, a fitted portion 2B to which the fitting portion 1B fits, and the fitting portion 1F. The fitted portion 2F to which is fitted is formed. Further, the hanging piece 2 includes a fitting portion 2C that fits into the fitted portion 1C of the receiving piece 1, a fitting portion 2D that also fits into the fitted portion 1D, and the fitted portion 2D. A fitting portion 2E that fits into the portion 1E is formed.

Further, the hanging piece 2 is provided with bolt holes 2R2A and 2R2B which are round holes above the fitted portions 2A and 2B, and are round holes above between the bolt holes 2R2A and 2R2B. The hanging hole 2R1 is opened.

The hanging piece 2 includes the fitted portions 2A and 2B, the fitting portions 2C, 2D and 2E, the fitted portion 2F, the lower portion 2L in which the bolt holes 2R2A and 2R2B are opened, and the hanging portion 2. It is composed of an upper part 2U in which the hole 2R1 is opened.

The outer shape of the lower portion 2L of the hanging piece 2 has a substantially trapezoidal shape in which the upper base is shorter than the lower base, and the upper portion 2U has a generally semicircular shape having a gentle chevron shape, and the uppermost end of the lower portion 2L. The width of the portion is longer than the width of the lowermost end portion of the upper portion 2U, and step portions 2S and 2S are formed on the left and right between the uppermost end portion of the lower portion 2L and the lowermost end portion of the upper portion 2U. Therefore, the skirt portion 2G is formed on the outside of the groove in which the receiving piece 1 of the lower portion 2L is fitted.

The receiving piece 1 according to the present invention has a height of 45 mm or more and 50 mm or less, which is unconventional and is too low. However, due to the nature and proof stress of the steel material, it has the ability to lift a load sufficiently, and it is effective to connect the fitting part and prevent buckling in order to implement it as a hanging tool on the other side of the hanging jig TJ described above. It has a function.

If the height of the receiving piece 1 exceeds 50 mm, the roof base material interferes with the roof base material and the roof base material cannot be covered. If it is lower than 45 mm, the volume of the steel material at the fitting portion will be insufficient, and due to the nature of the steel, the dimensions will be strict to receive the suspension load, and the load cannot be transmitted well. Therefore, the height of the receiving piece 1 according to the present invention is set to 45 mm or more and 50 mm or less.

In the steel frame lifting device of the present invention, after the steel frame G is placed in a predetermined position at a construction site, the fitting portion where the hanging piece 2 and the receiving piece 1 are fitted is fitted at a high place. Since the connection is released, gaps are required on the surfaces that fit each other so that they can be fitted and released smoothly, and these gap dimensions are set between 0.5 mm and 1.0 mm. If this is done, the fitting can be performed smoothly without being loose and tight, and the fitting balance between the hanging jig TJ and the receiving piece 1 can be easily attached and detached.

That is, the gap size between the fitting portions 1A and 1B of the receiving piece 1 to be fitted to each other and the fitted portions 2A and 2B of the hanging piece 2 and the fitting of the hanging piece 2 to be fitted to each other. The size of the gap between the parts 2C, 2D, 2E and the fitted parts 1C, 1D, 1E of the receiving piece 1, and the fitting portion 1F of the receiving piece 1 and the fitting portion 2 of the hanging piece 2 to be fitted, respectively. As described above, the clearance dimension with the joint portion 2F is set between 0.5 mm and 1.0 mm.

Next, FIG. 7 shows the holding plate 3A and the spacer 3B, both of which are made of steel and have a thickness of 9 mm. The horizontal dimension of the holding plate 3A is 1 to 1.5 mm shorter on each side than the maximum dimension (horizontal dimension at the bottom) of the spacer 3B, and when the hanging jig TJ is assembled, the upper end surface of the holding plate 3A and the holding plate 3A are described. The spacer 3B is arranged with a gap of 0.5 to 1.0 mm from the lower end surface. Bolt holes 3R2A and 3R2B are provided in the holding plate 3A, and a hanging hole 3BR1 which is a round hole is provided in the spacer 3B.

FIG. 8 shows the side plate 4, which is made of steel and has a thickness of 9 mm. The maximum lateral dimension of the attachment plate 4 is the same as the lateral dimension of the spacer 3B. Hexagonal bolt holes 4R2A and 4R2B and suspension holes 4R1 are provided in the attachment plate 4.

FIG. 9 shows the fixing plate 5, and in this embodiment, two plates are used. A substantially semicircular introduction fitting groove 6A is opened in the central portion of the lower end of the fixing plate 5, and a fixing fitting groove 6B communicating with the introduction fitting groove 6A from below and extending upward is opened. .. The shorter width of the fixing fitting groove 6B is slightly longer than 12 mm. That is, the hanging piece 2 and each fixing plate 5 until the upper end of the opening formation on the fixing fitting groove 6B of the fixing plates 5 and 5 abuts on the stepped portions 2S and 2S of the hanging piece 2. In order to fit the suspension piece 2 into the fixing fitting groove 6B from above so that 5 has a substantially T-shape in a plan view and is orthogonal to each other, the width of the shorter side of the fixing fitting groove 6B is shorter. Is a little longer than 12 mm.

Next, the assembly of the above-mentioned hanging jig TJ and the operation of the steel frame lifting device will be described. In a factory or the like, the receiving piece 1 is fixed to the steel frame G by welding, which will be described below. The maximum horizontal dimension (bottom horizontal dimension) of the spacer 3B, the maximum horizontal dimension of the attachment plate 4, and the maximum horizontal dimension (bottom horizontal dimension) of the upper portion 2U of the hanging piece 2 are the same dimensions. First, the operator will explain the assembly of the hanging jig TJ to be integrated.

First, the operator arranges the attachment plate 4 and the spacer 3B so as to sandwich the suspension piece 2, and the fixing plates 5 and 5 are respectively provided through the introduction fitting groove 6A. It is fitted into the fixing fitting groove 6B from above the hanging piece 2. That is, as shown in FIG. 9, at the center of the fixing plate 5 in the width direction, the fixing fitting groove 6B for inserting and assembling into the hanging piece 2 from above is formed so as to extend upward. In the present embodiment, the fixing plates 5 are provided on the left and right sides of the hanging piece 2, respectively, but considering the assembly accuracy of the hanging jig TJ, the fixing plate 5 is formed from one steel plate provided with the fixing fitting groove 6B. It may be configured.

Then, as described above, the fixing plates 5 and 5 have the fixing plates 5 and 5 until the upper end of the opening of the fixing fitting groove 6B of the fixing plates 5 and 5 abuts on the stepped portions 2S and 2S of the hanging piece 2. In a state where the hanging piece 2 is fitted in the fixing fitting groove 6B, as shown in FIGS. 2, 4 and the like, the operator moves the hanging piece 2 and the outside of each fixing plate 5 (the fixing plate). The peripheral portion of the outer opening of each of the fixing fitting grooves 6B of 5 and 5 is fixed by welding WD, and the outside of the attachment plate 4 and the inside of each of the fixing plates 5 and 5 (the attachment plate 4 seen from the outside). And the mating portions of the fixing plates 5 and 5) are similarly fixed by welding WD, and the contact portion between the upper surface of the fixing plates 5 and 5 and the attachment plate 4, the hanging piece 2 and the spacer 3B is welded WD. Fix with.

That is, the suspension piece 2, the attachment plate 4, the spacer 3B, and the fixing plates 5 and 5 are integrated by each of the welding WDs described above with the suspension piece 2 sandwiched (see FIG. 4). The total height of the holding plate 3A and the spacer 3B and the height of the attachment plate 4 are both shorter by the length H than the hanging piece 2, and are integrated as described above. In the state where the pressing plate 3A is attached, the lower ends of the supporting plate 4 and the pressing plate 3A are located above the flush surface of the steel frame G by a length H. This length H is a length for avoiding the bead of the welded WD in which the receiving piece 1 is attached to the steel frame G. The portion of the side plate 4 that can be seen through the fitting groove KM shown in FIG. 4 serves to hold (support) one side of the receiving piece 1 that is later connected to the hanging jig TJ.

Next, in a state where the hanging piece 2, the attachment plate 4, the spacer 3B, and the fixing plates 5 and 5 are integrated by each of the welding WDs described above, the operator is continuous below the spacer 3B. The holding plate 3A is arranged so as to be in contact with the hanging piece 2, and the shafts of the bolts B and B are inserted through the bolt head holes 4R2A and 4R2B of the attachment plate 4, and then the hanging piece 2 is inserted. The bolt holes 2R2A and 2R2B of the above are inserted. After that, the bolt holes 3R2A and 3R2B, which are the round holes of the holding plate 3A, are inserted through the shafts of the bolts B and B protruding from the bolt holes 2R2A and 2R2B of the suspension piece 2.

Then, the head BTs of the shafts of the bolts B and B are housed in the bolt head holes 4R2A and 4R2B of the attachment plate 4, and the back surface of the head BT is in contact with the attachment plate 4 of the suspension piece 2. After inserting the nuts N and N until they come into contact with the contacting surfaces, the operator lightly tightens the nuts N and N to the shafts of the bolts B and B, and then attaches the bolt pins BP and BP to the shafts of the bolts B and B. The suspension jig TJ is completed by preventing the nuts N and N from falling off from the shafts of the bolts B and B (see FIG. 10A).

In this case, the distance between the inner surface of the holding plate 3A and the side surface of the hanging piece 2 facing the holding plate 3A must be at least 1 times the plate thickness of the hanging piece 2. It doesn't become. This is a length (interval) corresponding to one or more times the plate thickness of the receiving piece 1 having the same thickness as the hanging piece 2, and the distance between the pressing plate 3A and the attachment plate 4 is the distance between the receiving piece 1 and the receiving piece 1. The receiving piece 1 can be easily brought into the space between the holding plate 3A and the attachment plate 4 below the hanging piece 2 so as to be twice or more the thickness.

Note that FIG. 10A is a cross-sectional view before the receiving piece 1 welded and attached to the steel frame G is fitted with the hanging piece 2 serving as the connecting portion, but the operator actually performs the hanging jig. Since the TJ is mounted so as to cover the receiving piece 1, the spacer 3B or the like obstructs the view and the hanging piece 2 is difficult to see, but the receiving piece 1 fits with the hanging piece 2 serving as a connecting portion. However, since there is nothing to prevent it, even if it appears and disappears, the fitting portions of the receiving piece 1 and the hanging piece 2 are attracted to each other and can be immediately connected and connected.

If the hanging piece 2 and the holding plate 3A are in close contact with each other without a gap, the fitting portion of the receiving piece 1 and the hanging piece 2 can be fitted to each other, so that it is easy to confirm the connection and connection. Can be done. The spacer 3B is not always necessary, but if the fitting portion between the hanging piece 2 and the receiving piece 1 is fitted and connected to each other, the surfaces of the holding plate 3A and the spacer 3B are aligned. It is a guide for confirming that the connection is sufficient.

Then, as described above, after confirming the connection between the hanging piece 2 and the receiving piece 1, the operator tightens the nuts N and N, and attaches the hanging piece 2 to the attachment plate 4 and the holding plate 3A. It is fixed so as to be sandwiched between and supported, and the state is as shown in FIG. 10 (b). Therefore, the assembly of the hanging jig TJ described above is completed.

Next, as shown in FIGS. 1, 2 and 3, the operator puts the shackle SC, which is a U-shaped connector, into the U-shaped space from above with the hanging jig TJ. The shackle pin SP having the screw shaft portion is arranged in such a manner as both screw holes of the shackle SC, the suspension hole 3BR1 of the spacer 3B, the suspension hole 2R1 of the suspension piece 2, and the suspension hole which is a round hole of the attachment plate 4. 4R1 is inserted, rotated and tightened with screws.

After making such a state, as shown in FIGS. 11 and 12, at the construction site, the connecting jig of the suspension wire TW from the crane or the like was attached to the two welded receiving pieces 1 of the steel frame G, respectively. It is connected to the shackle SC, the steel frame G is lifted by the crane or the like via the hanging jig TJ (and the receiving piece 1), and the steel frame G is moved and transported to a desired place (position). After this transportation, the operator breaks the connection between the receiving piece 1 and the hanging jig TJ while keeping the hanging jig TJ and the shackle SC connected to separate the crane SC. That is, by loosening the tightening of the nuts N and N, the connection between the receiving piece 1 and the hanging piece 2 is released to prepare for the next work.

As described above, the first feature of the present invention is that the steel frame lifting device is divided into two parts, a hanging side (the hanging jig TJ) and a hanging side (the receiving piece 1). The receiving piece 1 welded to the steel frame G and the hanging jig TJ can be connected to and detached from each other only by restraining and releasing only the fitting portion, and can be attached and detached. It is characterized in that it is not necessary to attach / detach the large and heavy shackle SC directly attached to the hanging piece 22 which is welded and fixed to the steel frame G as shown in 14.

Further, as a second feature, the conventional hanging piece 22 shown in FIG. 13 will be compared and described. In the conventional suspension piece 22, when the steel frame G is erected by a crane or the like, a bending load is inevitably applied to the suspension piece 22. That is, when unloading from a truck at a construction site, the steel frame G is often loaded sideways, and although the actual lifting direction is upward, the hanging piece 22 must generally be raised from the side. .. The original performance of the hanging piece 22 is effective against a vertical load, but when the shackle SC is attached to the horizontal hanging piece 22 and built up, the load is applied in the thickness direction of the plate of the hanging piece 22.

That is, since bending stress is generated in the hanging piece 22, there is a drawback that the hanging piece 22 must be made larger and thicker even if it can withstand a vertical load but is weak against a lateral load. Since the conventional suspension piece 22 that can withstand only a vertical load is erected as shown in FIG. 14, the suspension piece 22 is bent by an angle θ due to the weight of the steel frame G, which makes it difficult to see and causes distrust, and a safety factor. There is anxiety such as deterioration of the welded part and deformation or damage of the welded part.

However, when the steel frame G is erected by the hanging jig TJ of the present invention, the hanging jig TJ is substantially perpendicular to the steel frame G, as shown in FIG. Even in this case, bending stress is naturally generated in the vicinity portion separated by the length H from the steel frame G in the receiving piece 1, but the fixing plates 5 and 5 support and bear the bending stress. Explaining with reference to FIG. 3, the bottom 5A of each of the fixing plates 5 and 5 and the steel frame G are in contact with each other without a gap. Therefore, when the steel frame G is erected by the crane or the like, the tensile load NA acts, but the bottom 5A of each of the fixing plates 5 and 5 repels, and the length H from the steel frame G of the receiving piece 1 The distant nearby part suppresses the force to bend. Similarly, when a tensile load NB acts on the shackle SC in FIG. 1, the bottom 2H of each skirt portion 2G repels the shackle SC, so that all the bending stress is not transmitted to the receiving piece 1. Therefore, buckling is unlikely to occur even with the small receiving piece 1.

Further, since the fitting portions 2C and 2E of the hanging piece 2 have the fixing plates 5 and 5 immediately after that and are fixed by the welding WB, the hanging piece is temporarily attached to the fitting portion. When a load such as an impact exceeding the hanging performance possessed by 2 is applied, the fitting portions 1A and 1B of the receiving piece 2 and the fitted portion 1D act to stretch due to the nature of steel. Since the fitted portions 1C and 1E are in the vicinity of each fixing plate 5 and the suspension piece 2 and each fixing plate 5 are fixed by the welding WD, the action of withstanding the breaking load of the steel material works. That is, since the fitted portions 1C and 1E are forcibly restrained, the deformation of the entire receiving piece 1 is extremely small, and even a small receiving piece 1 has the ability to sufficiently lift the steel frame G.

As described above, in the fixing plates 5, 5 and the skirt portions 2G and 2G of the receiving piece 2, and the fitting portions 2C and 2E, the receiving piece 1 shifts from the elastic region to the plastic deformation region due to the nature of steel. Even when trying to do so, the receiving piece 1 is forcibly restrained, so that the space having the length (height) H serves to help prevent deformation or buckling.

Next, as a third feature of the present invention, since the height of the receiving piece 1 is 45 mm or more and 50 mm or less, the work after the connection with the hanging tool TJ is released is the same as that of the conventional method. The difference is that the cutting process of the hanging piece becomes unnecessary, both the construction cost and the construction period are shortened, and the worker's staying time at the site is reduced.

Conventionally, as shown in FIG. 14, in the normal assembly of the steel frame G, when the steel frame G is lifted, the suspension piece 22 made of a steel material is welded to the steel frame G such as a column or a beam to form a shackle SC. Although it is lifted through the steel frame G, the hanging piece 22 is not cut immediately after the rough assembly of the steel frame G. The procedure is the cutting work when the main bolts are tightened after the steel frame assembly is completed and there is no risk of collapse, and when the next construction materials and temporary scaffolding are placed. For example, in order to cut the hanging piece 22 welded to the steel frame G on the upper floor of a five-story building, the cutting gas cylinder is on the ground, the cutting torch is several tens of meters above the ground, and the gas hose can be routed alone. It's a lot of work.

Even though the hanging piece 22 is broken from the upper floor of the building under construction, it must never be dropped, and there are many indirect problems such as fall prevention measures and cutting spark curing. Therefore, if the hanging piece 2 having a protruding height of 45 mm or more and 50 mm or less of the present invention and the connecting connection with the receiving piece 1 welded to the steel frame G is a detachable type, all the above problems are solved. Will be done. Furthermore, the short stay time of workers at the site, that is, the short contact time with dangerous work, is also a major feature that leads to safety management.

Next, as a fourth feature of the present invention, since the scaffolding is unstable at a high place during the assembly of the steel frame G at the construction site, the hanging jig also needs to take measures to prevent it from falling. Normally, both workers and tools are equipped with lifelines, and measures are taken to prevent them from falling even if the tools slip and move away from their hands. In the present invention, as a measure to prevent the fall, the hanging jig TJ is connected to the shackle SC, and the steel frame G is released from the restraint (connection) of the portion (the receiving piece 1) connected to the steel frame G. When separated from, the parts constituting the hanging jig TJ do not fall off.

More specifically, the bolts B and B that restrain the holding plate 3A are semi-fixed by loading (inserting) each bolt head BT and BT into the bolt head holes 4R2A and 4R2B of the attachment plate 4, and each bolt. There is almost no gap between the head holes 4R2A and 4R2B and the bolt heads BT and BT so that they are not loosened, and they are not fixed by welding. This is so that the bolts B and B can be easily replaced when it is time to replace the bolts B and B due to damage during repeated use of the hanging jig TJ. It is not fixed by welding.

Then, when the hanging jig TJ is separated from the steel frame G, the holding jig TJ is connected to the shackle SC, and the tightened nuts N and N are loosened to remove the holding plate 3A. The bolt pin BP provided at the tip of the shaft of the bolt B, B serves as a stopper, and the nut N, N and the holding plate 3A can be prevented from falling off. Although the bolt pin BP is used as the stopper, another mechanism may be used as long as the nuts N and N do not fall off.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, various alternative examples, modifications or modifications can be made to those skilled in the art based on the above description, and the present invention does not deviate from the gist thereof. Incorporates the various alternatives, modifications or modifications described above.

1 Receiving piece 2 Suspension piece 3A Holding plate 3B Spacer 4 Attachment plate 5 Fixing plate 6A Introductory fitting groove 6B Fixing fitting groove B Bolt BP Bolt pin N Nut SC Shackle SP Shackle pin G Steel frame WD Welding H Length

It is a front view of the steel frame lifting device. FIG. 1 is a view of FIG. 1 from above. It is a right side view of FIG. It is a front view of the suspension jig before connecting the receiving piece and the suspension jig, in which the suspension piece is integrated with the fixing plate in a state of being sandwiched between the attachment plate and the spacer. It is a front view of the receiving piece which constitutes a hanging jig. It is a front view of the hanging piece constituting a hanging jig. It is a front view of the holding plate and a spacer which make up a hanging jig. It is a front view of the attachment plate which constitutes a hanging jig. It is a front view of one of the fixing plates constituting a hanging jig. In the cross-sectional view taken along the line XX of FIG. 1, (a) shows before fitting the receiving piece, and (b) shows after fitting. It is a figure which shows the use example of the steel frame lifting apparatus of this invention. It is a state explanatory diagram when a steel frame is erected from the ground. It is a figure which shows the conventional hanging metal fitting, (c) is a front view, (d) is a side view. It is a state explanatory view of the conventional example when a steel frame is erected from the ground.

The basic mechanism for lifting the steel frame G is composed of the receiving piece 1 welded to the steel frame G and the hanging jig TJ on the hanging side, and the receiving piece 1 and the hanging jig TJ are detached from each other. It is possible. The hanging jig TJ is composed of the hanging piece 2, the holding plate 3A, the spacer 3B, the attachment plate 4, the pair of fixing plates 5, 5, the bolt B, and the nut N. That is, the suspension piece 2 constitutes the suspension jig TJ together with other members, that is, the holding plate 3A, the spacer 3B, the attachment plate 4, and the pair of the fixing plates 5, 5, and the suspension jig TJ and the above. The receiving piece 1 is divided into upper and lower parts and can be connected or disconnected to form a detachable steel frame lifting device .

After making such a state, as shown in FIGS. 11 and 12, at the construction site, the connecting jig of the suspension wire TW from the crane or the like was attached to the two welded receiving pieces 1 of the steel frame G, respectively. ligated to the shackle SC, by lifting the steel G via the hanging jig TJ (and the receiving piece 1) at the crane or the like, to move conveyed Agekasane to the desired location (position) After this transportation, the operator breaks the connection between the receiving piece 1 and the hanging jig TJ while keeping the hanging jig TJ and the shackle SC connected to separate the crane SC. That is, by loosening the tightening of the nuts N and N, the connection between the receiving piece 1 and the hanging piece 2 is released to prepare for the next operation.

In order to solve the above problems, the first invention is a steel frame lifting device used for lifting a steel frame at a construction site or the like.
It is provided with a receiving piece to be welded to the steel frame and a hanging jig for lifting the steel frame via a hanging wire by a crane or the like that is detachably connected to the receiving piece and connected to a shackle .
A hanging piece having a fitting groove for fitting the hanging jig to the receiving piece, a supporting plate for supporting one surface of the hanging piece, and a fixing provided extending upward from the lower portion thereof. A fixing plate that fits the hanging piece from above in the fitting groove, a holding plate for supporting the other surface of the hanging piece, and the attachment plate, the hanging piece, and the holding plate are provided. It consists of a bolt that is inserted into the hole and a nut that is tightened with the bolt inserted.
The receiving piece welded to the steel frame and the hanging piece of the hanging jig are connected, and then the nut is tightened to fix the receiving piece and the hanging jig. ..

The second invention is a steel frame lifting device used for lifting a steel frame at a construction site or the like.
It is provided with a receiving piece to be welded to the steel frame and a hanging jig for lifting the steel frame via a hanging wire by a crane or the like that is detachably connected to the receiving piece and connected to a shackle.
A hanging piece having a fitting groove for fitting the hanging jig to the receiving piece, a supporting plate for supporting one surface of the hanging piece, and a fixing provided extending upward from the lower portion thereof. To support the fixing plate that fits the suspension piece from above in the fitting groove, and the other surface of the suspension piece in a state where the suspension piece, the attachment plate, and the fixing plate are fixed by welding. It is composed of a holding plate, a supporting plate, a hanging piece, a bolt to be inserted into a hole formed in the holding plate, and a nut for tightening with the bolt inserted.
The receiving piece welded to the steel frame and the hanging piece of the hanging jig are connected, and then the nut is tightened to fix the receiving piece and the hanging jig. ..

The third invention is a steel frame lifting device used for lifting a steel frame at a construction site or the like.
It is provided with a receiving piece to be welded to the steel frame and a hanging jig for lifting the steel frame via a hanging wire by a crane or the like that is detachably connected to the receiving piece and connected to a shackle.
A hanging piece having a fitting groove for fitting the hanging jig to the receiving piece, a supporting plate for supporting one surface of the hanging piece, and a fixing provided extending upward from the lower portion thereof. To support the fixing plate that fits the suspension piece from above in the fitting groove, and the other surface of the suspension piece in a state where the suspension piece, the attachment plate, and the fixing plate are fixed by welding. It is composed of a holding plate, a supporting plate, a hanging piece, a bolt to be inserted into a hole formed in the holding plate, and a nut for tightening with the bolt inserted.
The hanging piece of the hanging jig with the nut attached to the bolt so that the distance between the holding plate and the attached plate is at least twice the thickness of the receiving piece 1 is welded to the steel frame. after connected to the receiving piece, which is characterized by fixing the jig hanging the said receiving piece by tightening the nut.

The fourth invention is the lower end of the attachment plate and the lower end of the holding plate located on both side surfaces of the hanging piece when the receiving piece and the hanging jig are connected in the first to third inventions. Is characterized in that it is positioned upward so as to avoid a bead of welding between the steel frame and the receiving piece.

A fifth aspect of the present invention is the first to third inventions, in which the bolt prevents the nut from falling after the bolt inserts the attachment plate, the hanging piece and the holding plate, and then fits the nut. It is characterized in that a bolt pin for using the bolt is attached to the bolt.

The sixth invention is characterized in that, in the first to third inventions, the height of the receiving piece is 45 mm or more and 50 mm or less.

Claims (8)

A steel frame lifting device used to lift steel frames at construction sites, etc.
It is characterized by being composed of a receiving piece welded to the steel frame and a hanging jig for lifting the steel frame via a hanging wire by a crane or the like that is detachably connected to the receiving piece and connected to a shackle. Steel frame lifting device. A steel frame lifting device used to lift steel frames at construction sites, etc.
It is provided with a receiving piece to be welded to the steel frame and a hanging jig for lifting the steel frame via a hanging wire by a crane or the like that is detachably connected to the receiving piece and connected to a shackle.
A steel frame lifting device characterized in that the hanging jig can be released from the connection with the receiving piece while being connected to the shackle. A steel frame lifting device used to lift steel frames at construction sites, etc.
It is provided with a receiving piece to be welded to the steel frame and a hanging jig for lifting the steel frame via a hanging wire by a crane or the like that is detachably connected to the receiving piece and connected to a shackle.
A hanging piece having a fitting groove for fitting the hanging jig to the receiving piece, a supporting plate for supporting one surface of the hanging piece, and a fixing provided extending upward from the lower portion thereof. A fixing plate that fits the hanging piece from above in the fitting groove, a holding plate for supporting the other surface of the hanging piece, and the attachment plate, the hanging piece, and the holding plate are provided. It consists of a bolt that is inserted into the hole and a nut that is tightened with the bolt inserted.
Lifting of a steel frame, characterized in that the receiving piece and the hanging jig are fixed by tightening the nut after connecting the receiving piece welded to the steel frame and the hanging piece of the hanging jig. apparatus. A steel frame lifting device used to lift steel frames at construction sites, etc.
It is provided with a receiving piece to be welded to the steel frame and a hanging jig for lifting the steel frame via a hanging wire by a crane or the like that is detachably connected to the receiving piece and connected to a shackle.
A hanging piece having a fitting groove for fitting the hanging jig to the receiving piece, a supporting plate for supporting one surface of the hanging piece, and a fixing provided extending upward from the lower portion thereof. To support the fixing plate that fits the suspension piece from above in the fitting groove, and the other surface of the suspension piece in a state where the suspension piece, the attachment plate, and the fixing plate are fixed by welding. It is composed of a holding plate, a supporting plate, a hanging piece, a bolt to be inserted into a hole formed in the holding plate, and a nut for tightening with the bolt inserted.
Lifting of a steel frame, characterized in that the receiving piece and the hanging jig are fixed by tightening the nut after connecting the receiving piece welded to the steel frame and the hanging piece of the hanging jig. apparatus. A steel frame lifting device used to lift steel frames at construction sites, etc.
It is provided with a receiving piece to be welded to the steel frame and a hanging jig for lifting the steel frame via a hanging wire by a crane or the like that is detachably connected to the receiving piece and connected to a shackle.
A hanging piece having a fitting groove for fitting the hanging jig to the receiving piece, a supporting plate for supporting one surface of the hanging piece, and a fixing provided extending upward from the lower portion thereof. To support the fixing plate that fits the suspension piece from above in the fitting groove, and the other surface of the suspension piece in a state where the suspension piece, the attachment plate, and the fixing plate are fixed by welding. It is composed of a holding plate, a supporting plate, a hanging piece, a bolt to be inserted into a hole formed in the holding plate, and a nut for tightening with the bolt inserted.
The hanging piece of the hanging jig with the nut attached to the bolt so that the distance between the holding plate and the attached plate is at least twice the thickness of the receiving piece 1 is welded to the steel frame. A steel frame lifting device characterized in that the receiving piece and the hanging jig are fixed by tightening the nut after being connected to the receiving piece. When the receiving piece and the hanging jig are connected, the lower ends of the attachment plate and the lower end of the holding plate located on both side surfaces of the hanging piece avoid the bead of welding between the steel frame and the receiving piece. The steel frame lifting device according to any one of claims 3 to 5, wherein the steel frame lifting device is configured so as to be located above. After the bolt has inserted the attachment plate, the suspension piece, and the holding plate, and then the nut has been fitted, a bolt pin for preventing the nut from falling is attached to the bolt. The steel frame lifting device according to any one of claims 3 to 5. The steel frame lifting device according to any one of claims 3 to 5, wherein the height of the hanging piece is 45 mm or more and 50 mm or less.

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