JPH07217347A - Fixture of temporary ladder for steel framed column and mounting method thereof - Google Patents

Abstract

PURPOSE:To facilitate the mounting and removal of a temporary ladder to and from a steel framed column and the connection of the ladder. CONSTITUTION:A fixture 1 for a temporary ladder 31 is composed of a ladder bracket metal 2, a plurality of receiving rails 3 and a column fixture 4. The ladder bracket metal 2 has abutting frames 5 abutted and attached to a steel framed column 30, ladder receiving arms 6 mounted at every pair left and right vertically and upper and lower connecting frames 7 among the arms. The ladder receiving arms 6 have receiving-rail inserting holes 8 separated before and behind, and ladders 31 on the upper side and ladders 31 on the lower side are arranged before and behind and can be disposed among the mutual inserting holes 8. Each receiving rail 3 is inserted extending over the receiving-rail inserting holes 8 of the ladder receiving arms 6 and holes 33 in the crossbars 34 of the ladders 31, and fixed and attached by rail fasteners 9. The column fixture 4 fastens the abutting frames 5 onto the steel framed column 30 while surrounding the steel framed column 30, and has connecting bolts 12, 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting jig and a mounting method for a temporary ladder for a steel column which is used during erecting.

[0002]

2. Description of the Related Art Conventionally, in a steel frame building, as a temporary ladder used during erection, footrests 41 and 42 are provided on a steel frame column 40 as shown in FIGS. Ladder 4 in Figure 9
No. 3 is obtained by welding both ends of a footing member 41 in which a reinforcing bar is bent in a hat shape to the steel frame columns 40. The ladder 44 of FIG.
Is a fixture 45 having locking portions 45a at two positions on the left and right,
It consists of a detachable footrest 46 that is locked to the attachment 45. The fixture 45 is welded to the steel column 40.

[0003]

However, in the ladder 43 shown in FIG. 9, if the ladder 43 is left as it is after the construction is completed, the indoor space may be narrowed in a pillar shape depending on the structure of the building, and the floor material may be reduced. It will be an obstacle to the installation of walls and wall materials. Therefore, there is a problem that the footing material 41 has to be removed from the steel frame column 40, and that the operation requires a lot of time. On the other hand, in the temporary ladder 44 shown in FIG.
By the simple work of removing the detachable foot member 46 from the above, it is possible to leave only the detachable foot member 45 on the surface of the steel frame column 40, but in some cases, even with the fixture 45 having a small protrusion amount, a wall material or the like. May interfere with the construction of. At this time, it becomes necessary to remove the fixture 45, and again it takes a lot of time to remove it. It is conceivable to use a general-purpose aluminum ladder or the like instead of providing the fixed ladders 43 and 44 as described above, but since the ladder is not long enough, it is difficult to connect the ladders and There is a problem that it becomes stable.

An object of the present invention is to provide a mounting jig and a mounting method for a temporary ladder for a steel column, which can easily attach and detach the temporary ladder to and from the steel column and connect the upper and lower ladders. is there.

[0005]

A jig for mounting a temporary ladder for a steel frame pillar according to the present invention is a ladder bracket, a plurality of receiving bars,
A pillar fixture is provided. The ladder receiver is
A contact frame to be attached to a part of the outer circumference of the steel column, a pair of left and right ladder receiving arms at upper and lower positions, an upper and lower connecting frame for connecting the upper and lower ladder receiving arms, and a connecting body of these ladder receiving arms. And a fixing portion fixed to the pad frame. The left and right ladder receiving arms of each pair have front and rear receiving bar insertion holes, and the upper ladder and the lower ladder can be arranged side by side between each other. Each of the receiving bars is inserted through the left and right side girders of the ladder and the receiving bar insertion holes of the left and right ladder receiving arms, and is fixed to the ladder receiving arms by a bar stop. The pillar fixing tool has a fastening tool that surrounds a remaining portion of the steel frame pillar to which the abutment frame is attached, has both ends connected to the abutment frame, and is fastened to the steel column. The receiving rail insertion hole of the ladder can be used as the receiving rail insertion hole for receiving the hole in the pipe-made horizontal bar in an ordinary aluminum ladder or the like using a pipe for the horizontal bar.

A mounting jig according to a second aspect of the present invention is the mounting jig according to the first aspect, wherein the crosspiece stopper is a tubular member having a threaded portion at a base end and protruding to the outside of the ladder receiving arm. ,
It is adapted to be screwed to the end portion of the receiving bar with the screw portion.

A mounting jig according to a third aspect of the present invention is the mounting jig according to the first aspect, wherein the upper and lower connecting frames are provided with a height adjusting mechanism capable of adjusting a distance between the upper and lower ladder receiving arms. is there.

A mounting jig according to a fourth aspect of the present invention is the mounting jig according to the first aspect, wherein the column fixing device connects the pair of strips and the base ends of the strips to both ends of the pad frame. And a middle connecting bolt for connecting the leading ends or middle portions of both strips to each other. One of the strips has bolt insertion holes through which the intermediate connecting bolt is inserted at a plurality of positions in the longitudinal direction, and the fastener is composed of the base end connecting bolt and the intermediate connecting bolt.

A mounting jig according to a fifth aspect of the present invention is the mounting jig according to the first aspect, further comprising a column fixing tool, a flexible band having both ends coupled to both ends of the backing frame, and the band. The length shall be adjustable and the tightening tool shall be used.

A method of mounting a temporary ladder for a steel frame pillar according to the present invention is a ladder mounting method using a jig for mounting a temporary ladder for a steel frame pillar according to claim 2, wherein a plurality of ladders arranged vertically are arranged. The joint part is fixed to the steel frame column with the mounting jig, the receiving bar is inserted through the upper end of the uppermost ladder, and the beam stopper is attached to the receiving bar. Join the top of the ladder to the steel beam.

[0011]

According to the mounting jig of the present invention, the receiving rail is inserted through the pair of left and right ladder receiving arms and the receiving rail insertion hole of the ladder, and is fastened by the rail stopper to thereby secure the ladder and the mounting jig. Can be combined. In this way, by overlapping the ends of the upper and lower ladders back and forth and connecting them to the mounting jig,
The upper and lower ladders are connected via this jig. In addition, this mounting jig attaches the contact frame to a part of the outer circumference of the steel frame pillar,
By surrounding the remaining portion of the outer circumference of the steel column with the column fixing tool and tightening it with the tightening tool, it is possible to stably attach to the steel column. Thereby, the ladder can be stably supported.

According to the second aspect of the present invention, since the crosspiece stopper is made of a tubular member having a threaded portion and is attached so as to project to the outside of the ladder receiving arm, the crosspiece stopper is easy to handle and high in height. It can be easily attached and detached at places.

According to the third aspect of the invention, the interval between the upper and lower ladder receiving arms can be adjusted by operating the height adjusting mechanism. Therefore, the ladders used differ in the pitch of the receiving rail insertion holes, and the receiving rails can be connected by inserting the receiving rails by adjusting the intervals of the ladder receiving arms to the pitches.

In the case of the structure of claim 4, the base ends of the pair of strips are connected to both ends of the backing frame by the base end connecting bolts, respectively, and the tips or the intermediate portions of both strips are connected by the intermediate bolts. Thus, the periphery of the steel frame pillar can be surrounded and tightened by the contact frame and the pillar fixture. Also, by changing the bolt insertion hole on one of the strips for inserting the intermediate connecting bolt,
The attachment jig can be attached to steel columns having different thicknesses without rattling.

In the case of the fifth aspect of the invention, since the column fixing device is composed of the flexible band and the tightening device, a mounting jig can be attached to a steel column having any thickness and cross sectional shape. It can be installed without rattling.

According to the mounting method of the present invention, the upper end of the uppermost ladder can be easily coupled to the steel beam by the receiving bar and the bar stop, and the joints of the ladders arranged vertically are provided. It can be easily and stably fixed to a steel column with a mounting jig. Further, for the receiving rail and the rail stopper, the mounting jig for intermediate coupling and the one for fixing the upper end of the ladder can be used in common, and storage and handling are easy.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view showing a mounting jig for a temporary ladder for a steel frame column. This mounting jig 1 is a ladder receiving hardware 2
It is composed of four receiving bars 3 and a column fixing tool 4. The ladder receiving hardware 2 includes a pair of upper and lower contact frames 5 and 5 which are attached to the corners of a square-pipe-shaped steel column 30, four ladder receiving arms 6 provided in pairs at the upper and lower two positions, and upper and lower ladders. The upper and lower connecting frames 7 connect the receiving arms 6 and 6. The upper and lower contact frames 5 and 5 are made of steel strips that are bent at right angles in the center, and the connection ends 5a and 5a for the column fixture 4 are outwardly provided at both ends of the upper contact frame 5. It is provided by bending. The upper end of each of the upper ladder receiving arms 6 and 6 is welded to the contact frame 5, and the vicinity of the proximal end serves as a fixing portion 6a for the contact frame 5 of the ladder receiving arms 6 and 6. The lower ladder receiving arms 6 and 6 integrally extend from the contact frame 5, and a portion near the base end thereof serves as a fixing portion 6 a for the contact frame 5. Each of the ladder receiving arms 6 is formed with two receiving bar insertion holes 8, 8 which are separated from each other by a predetermined distance in the front and rear. The upper and lower connecting frames 7 are also made of steel strips, and their upper and lower ends are welded to the ladder receiving arms 6 and 6.

Each of the receiving bars 3 is made of a steel rod or the like inserted through the receiving bar insertion hole 33 of the ladder 31 and the receiving bar insertion hole 8 of the ladder receiving arm 6, and male screws 3a are provided at both ends thereof.
Are formed respectively. The ladder 31 is fixed to the ladder receiving arm 6 by screwing the crosspiece stopper 9 onto the male screw portion 3a. As shown in the sectional view of FIG. 2, the crosspiece 9 is formed by welding a nut in the base end of a tubular member to form an internal thread portion 9a. The ladder 31 attached by the attachment jig 1 is, for example, a general-purpose aluminum ladder having the following configuration. That is, a large number of foot rails 34 are provided between the left and right groove-shaped side girders 32. Yokogi 3 for each footrest
Reference numeral 4 is made of a pipe, and both ends are fitted and fixed in the holes formed in the side girders 32. The footrest cross bar 3
The hole in 4 is used as the receiving bar insertion hole 33. Note that the ladder 31 may have a hole that can be used as a receiving bar insertion hole in the side girder 32 at a position different from the cross bar 34.

The column fixing device 4 includes a pair of strip plates 10 and 11.
And a base end connecting bolt 12 and an intermediate connecting bolt 13. One of the strips 10 is bent into an L-shape that can be applied to a corner of the steel column 30, and one end of the strip 10 has a contact frame 5
A connecting end 10a opposite to the connecting end 5a of
At the other end, a connecting end portion 1 facing the middle portion of the other strip 11
0b is formed. Another strip 11 is bent at one end thereof into an L-shape that can be applied to a corner of the steel column 30.
At one end thereof, a connecting end portion 11a facing the connecting end portion 5b of the contact frame 5 is formed. Bolt insertion holes through which the base end connecting bolts 12 are inserted are formed in the connecting end portions 5a, 10a and the connecting end portions 5b, 11a facing each other, and are connected to each other by the base end connecting bolts 12 and nuts. . A bolt insertion hole for inserting the intermediate connection bolt 13 is formed in each of the connection end portion 10b of the strip plate 10 and the intermediate portion of the strip plate 11 facing the connection end portion 10b, and the bolts are inserted into each other by the intermediate connection bolts 13. The bolt insertion holes in the middle portion of the strip plate 11 are formed at a plurality of positions aligned in the longitudinal direction, so that the connecting position of the connection end portion 10b of the strip plate 10 with respect to the middle portion of the strip plate 11 can be changed.

An example of a procedure for mounting the ladder 31 on the steel frame column 30 using the mounting jig 1 of this embodiment will be described. This mounting work is performed in a state where the steel column 30 is laid down before standing. First, at the upper end of the steel column 30, two steel beams (in the illustrated example, steel beam joints) 3 protruding in the orthogonal direction are provided.
The angle member 36 is welded by bridging it between 5 and 35. The upper end of the uppermost ladder 31 is connected to the angle member 36 via the receiving bar 3, the beam stopper 9, and the clamp jig 37. That is, first, the receiving rail 3 is penetrated through the uppermost receiving rail insertion holes 33 of the side girders 32 of the ladder 31 and the footrest crosspiece 34, and the rail stoppers 9 are screwed to both ends of the receiving rail 3. The crosspiece 9 and the angle member 36 are connected by a clamp jig 37. In this way, the upper end of the uppermost ladder 31 is attached to the upper end of the steel column 30.

Next, at the position corresponding to the joint between the uppermost ladder 31 and the ladder 31 arranged below it, the contact frame 5 of the mounting jig 1 is contacted with the corner of the steel column 30, and The surroundings are surrounded by the column fixing tool 4, and the base end connecting bolt 12 and the intermediate connecting bolt 13 are tightened. At this time, steel pillar 3
According to the dimension of 0, as shown in FIGS. 6 (A) and 6 (B), the intervals between the connecting ends 5a and 10a and the intervals between the connecting ends 5b and 11a are adjusted by the base end connecting bolt 12, and the intermediate connecting is performed. By changing the bolt insertion hole in the intermediate portion of the strip 11 through which the bolt 13 is inserted, the connecting end portion 10b with respect to the intermediate portion of the strip 11 is changed.
Change the connection position of. Thereby, it can be used for the steel column 30 having various thicknesses.

Next, as shown in FIGS. 1 and 4, the receiving beam insertion holes 8 of the upper, lower, left and right ladder receiving arms 6 of the attachment jig 1 are formed.
From the above, the receiving rail 3 is passed through the receiving rail insertion hole 33 in the footrest crossbar 34 of the upper ladder 31, and the rail stoppers 9 are screwed to both ends of the receiving rail 3. This allows the upper ladder 31
The lower end of is fixed to the attachment jig 1. Similarly, the upper end of the lower ladder 31 is fixed to the mounting jig 1. The relationship between the inner and outer positions of the upper and lower ladders 31, 31 with respect to the steel frame column 30 is
Either may be arranged inside. In this manner, the lower ladder 31 is sequentially attached to each of the joints of the ladders 31 in the mounting jig 1.
Attach to the steel column 30 with. After the ladder 31 is attached, the steel column 30 is built. It should be noted that the ladder 31 may be attached by the attachment jig 1 after the steel frame column 30 is set up. When removing the ladder 31 from the steel column 30, the procedure can be performed in the reverse order of the above-described mounting procedure. Even if the angle member 36 welded to the upper portion of the steel frame column 30 is left without being removed, there is no problem because it is a portion hidden by the interior material or concrete.

In the illustrated example, the case where the column fixing tool 4 of the mounting jig 1 is fastened to the rectangular tubular steel frame column 30 has been described, but this mounting jig 1 is shown in FIG. It can also be attached to a cylindrical steel frame column 30 as shown by. In this case, the peripheral surface of the steel frame column 30 comes into point contact with each side of the rectangular frame body constituted by the column fixture 4 and the contact frame 5, and the mounting jig 1 is stably attached to the steel frame column 30. Can be installed.

6 (A) and 6 (B) respectively show another embodiment of the present invention. In each of these examples, the upper and lower connecting frames 7
The height adjusting mechanism 14 is provided in the. The height adjusting mechanism 14 shown in FIG.
The bolt insertion hole 15 is formed in one of a and 7b, and the longitudinal loose hole 16 is formed in the other.
The upper and lower connecting frame halves 7a and 7b are bolted by bolts 17 which are inserted over 6 to connect them. Further, the height adjusting mechanism 14 of FIG. 6 (B) is formed by vertically arranging a plurality of bolt insertion holes 18 that can be aligned with each other in each of the upper and lower coupling frame halves 7a and 7b, which are aligned with each other. The bolt insertion holes 18 of the connecting frame halves 7a and 7b are selectively combined and aligned, and the bolts 19 are inserted to bolt the upper and lower connecting frame halves 7a and 7b. In this way, the height adjusting mechanism 14 is attached to the upper and lower connecting frames 7
If it is provided in the above, the length between the upper and lower ladder receiving arms 6 and 6 can be easily adjusted to the arrangement pitch of the footrest crossbars 34 of the ladder 31, and the ladder 31 having various pitches can be accommodated. It will be possible.

FIG. 7 shows a modification of the column fixing tool 4. In this example, the column fixing tool 4 is composed of a flexible band 20 including a chain, a rope, a belt and the like and a fastening tool 21. That is, in this pillar fixing tool 4, one end of each of the bands 20 and 20 is connected to both connecting end portions 5a and 5b of the upper contact frame 5, and the other end of each of the bands 20 and 20 is fastened to the fastening tool 21.
The length can be freely adjusted by tightening. With this configuration, the mounting jig 1 can be stably mounted on the steel frame column 30 having any cross-sectional shape.

Further, as shown in FIG. 8, the contact frame 5 may have a shape in which its main body is curved in an arc shape. With this configuration, the contact frame 5 can be stably applied to the cylindrical steel frame column 30 as indicated by the chain line.

In each of the above-described embodiments, the contact frame 5 is provided at the height of the ladder receiving arm 6, but both 5 and 6 are provided at different heights, and each ladder receiving arm 6 is connected by the upper and lower connecting frames 7. The connected body formed by connecting may be fixed to the contact frame 5 by a fixing portion (not shown) which is a separate member.

[0028]

The jig for mounting a temporary ladder for a steel column according to the present invention is inserted into a ladder bracket having a pad frame and a ladder receiving arm to be attached to the steel column, and a receiving bar insertion hole of the ladder receiving arm. Since it is provided with a plurality of receiving bars for fixing the ladder to the ladder receiving arm and a column fixing tool for fixing the contact frame to the steel column, it is possible to attach / remove the temporary ladder to / from the steel column and The ladders can be easily connected, and the climbing and descending of the ladders can be stabilized.

In the case of the second aspect of the invention, since the crosspiece stopper is made of a tubular member having a threaded portion and is attached so as to project to the outside of the ladder receiving arm, the crosspiece stopper is easy to handle and high. Can be easily attached and detached at the place. Claim 3
In the case of the invention described above, since the height adjusting mechanism is provided, the ladder can be attached even if the ladder to be used has different pitches of the footrest crosspieces and the receiving beam insertion holes thereof. Claim 4
In the case of the invention described above, since the column fixing member is composed of the pair of strips, the base end connecting bolt and the intermediate connecting bolt, the mounting jig can be easily attached to steel frame columns having various thicknesses with a simple structure. It can be installed firmly without any sticking. In the case of the present invention as defined in claim 5, since the column fixing device comprises the flexible band and the fastening device, the attachment jig can be easily attached to the steel frame column of any size and sectional shape without rattling. be able to.

According to the method of attaching the temporary ladder for the steel frame pillar of the present invention, the joints of the plurality of ladders arranged vertically are fixed to the steel frame pillar, and the receiving bar is inserted through the upper end of the uppermost ladder. Since a bar stop is attached to the lever receiving bar and the upper end of the uppermost ladder is connected to the steel beam through this bar stop, the upper end of the uppermost ladder is attached to the receiving bar and the bar stopper. It can be easily connected to the beam, and the joints of the ladders arranged vertically can be easily and stably fixed to the steel column by the mounting jig of the present invention. Further, as for the receiving rail and the rail stopper, the mounting jig for intermediate coupling and the one for fixing the upper end of the ladder can be used in common, and storage and handling are easy.

[Brief description of drawings]

FIG. 1 is a perspective view showing a mounting jig according to an embodiment of the present invention.

FIG. 2 is a partially cutaway front view showing a structure for fixing the receiving bar of the mounting jig to the ladder.

FIG. 3 is a perspective view showing a state where a ladder is attached to a steel frame column using the same attachment jig.

FIG. 4 is a side view showing the same mounting state.

FIG. 5 is an explanatory diagram showing an adjusting function of a column fixing tool in the mounting jig.

6A and 6B are exploded perspective views showing a height adjusting mechanism of upper and lower connecting frames of a mounting jig according to another embodiment.

FIG. 7 is a plan view showing a mounting jig according to still another embodiment.

FIG. 8 is a plan view showing another embodiment of the contact frame in the mounting jig.

FIG. 9 is a perspective view showing an example of installation of a conventional temporary ladder on a steel frame column.

FIG. 10 is a perspective view showing another example of installation of a conventional temporary ladder on a steel frame column.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Mounting jig, 2 ... Ladder receiving object, 3 ... Receiving bar, 4 ... Column fixing tool, 5 ... Retaining frame, 6 ... Ladder receiving arm, 7 ... Vertical connection frame, 8 ... Receiving bar insertion hole, 9 ... Bar Stop

Claims (6)

[Claims] 1. A ladder receiving hardware, a plurality of receiving rails, and a column fixing tool, wherein the ladder receiving hardware is a contact frame to be applied to a part of the outer periphery of the steel column, and a pair of left and right upper and lower portions. Each of the pair of left and right ladder receiving arms has a ladder receiving arm provided, an upper and lower connecting frame that connects the upper and lower ladder receiving arms, and a fixing portion that fixes the connected body of these ladder receiving arms to the contact frame. Has a receiving bar insertion hole that is separated from the front and rear, and an upper ladder and a lower ladder can be arranged side by side between each other, and each receiving bar is a side girder and a left and right side girder of the ladder. Of the ladder receiving arm is inserted through the receiving beam insertion hole and fixed to the ladder receiving arm with a beam stopper, and the column fixing device surrounds the remaining portion to which the frame of the steel frame column is attached, and both ends are It is connected to the padding frame and faces the steel column. Fixing jig for a temporary ladder for a steel column that has a tightening tool. 2. The crosspiece stopper comprises a tubular member having a threaded portion at a base end and protruding to the outside of a ladder receiving arm, and is screwed to the end portion of the receiving crosspiece by the threaded portion. 1. A jig for mounting a temporary ladder for a steel column according to 1. 3. The jig for mounting a temporary ladder for a steel column according to claim 1, wherein the upper and lower connecting frames are provided with a height adjusting mechanism capable of adjusting a length between upper and lower ladder receiving arms of the upper and lower connecting frames. 4. A column fixing device connects a pair of strips, a base end connecting bolt that connects the base ends of the strips to both ends of the backing frame, and a tip or an intermediate portion of both strips to each other. An intermediate connecting bolt, wherein one strip has bolt insertion holes for inserting the intermediate connecting bolt at a plurality of positions in the longitudinal direction, and the fastening tool is configured by the proximal connecting bolt and the intermediate connecting bolt. 1. A jig for mounting a temporary ladder for a steel column according to 1. 5. The column fixing device comprises a flexible band whose both ends are connected to both ends of the pad frame, and a fastening device for fastening the band so that its length can be adjusted. Mounting jig for temporary ladders for steel columns. 6. A ladder mounting method using the mounting jig for a temporary ladder for a steel frame pillar according to claim 2, wherein a joint portion of a plurality of ladders arranged vertically is formed on the steel frame pillar by the mounting jig. A steel column that is fixed, inserts the receiving bar through the upper end of the uppermost ladder, and attaches the retaining bar to the receiving bar, and connects the upper end of the uppermost ladder to the steel beam through the retaining bar. How to install the temporary ladder.