JPH06330634A - Movable suspension block device for erection of steel column, and steel column erection method using the same - Google Patents

Abstract

(57) [Summary] [Purpose] The steel columns that have been brought into the field can be unloaded and installed in place without temporary placement, and there is a risk that the steel columns will swing significantly when standing up. (EN) Provided are a movable suspension block device for erection of a steel column, and a steel column erection method using the same. [Structure] A pair of left and right sprockets 2 axially supported by two parallel sprocket shafts 4A and 4B in a block case 3.
The chain 5 is hung on A and 2B while the chain 5 is slackened between the two sprockets 2A and 2B, and the left and right sprockets 2A and 2B are individually or interlocked by the movable mechanism in the block case 3 so as to be reversed. The rotation and brake can be stopped freely.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a movable suspension block device for erection of a steel frame column, which allows the steel column to be installed at a predetermined position as it is without temporarily placing the steel frame column that has been brought into the field, and the same. It is related to the method of erection of steel columns.

[0002]

2. Description of the Related Art Conventionally, a steel pillar is constructed by horizontally unloading a steel pillar that has been horizontally loaded on a truck bed or the like, unloading it with a crane, etc. A slinging wire is hung on the upper end of the rear steel column, which is hung up by a tower crane to erect the steel column vertically and erected at a predetermined position. According to the above conventional construction, it is difficult to secure a sufficient space for both the temporary placement and standing up of steel columns in urban areas. It interferes with the work, or when the steel column that has been temporarily laid on the ground is raised, the upper end of the steel column is slung and hoisted, so the lower end rubs against the ground. However, there is a problem that the steel column will swing greatly when the lower end is separated from the ground, which is dangerous.
Various work methods have been adopted at each site, such as using a suspension crane in order to deal with the restrictions and dangers of handling in the above-mentioned confined places.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problem of how to construct a steel column in a confined space, and has been made as a problem to be solved. Movable suspension blocks for erection of steel columns that can be erected in place as they are without unloading and temporarily placing the steel columns, and can eliminate the risk of the steel columns rocking significantly when standing up. An object of the present invention is to provide a device and a method for constructing a steel frame column using the device.

[0004]

In order to achieve the above object, the present invention has a structure in which a chain is loosened between a pair of left and right sprockets pivotally supported by two parallel sprockets in a block case. Movable suspension block device for erection of steel columns and sprocket for the above-mentioned left and right sprockets that can be independently or interlocked with a movable mechanism to control forward / reverse rotation and brake stop freely, and the movable suspension block for erection of steel columns After attaching the device to the hook of the crane and fastening both ends of the two chains hanging from the movable suspension block device to the upper and lower ends of the flat steel column, place the left and right sprockets individually or in conjunction. Control the forward and reverse rotation, brake stop, float the steel column in the air almost horizontally, then raise the steel column in the air,
A movable suspension block device for erection of steel columns was used, in which the chain on the side fastened to the lower end of the steel columns was removed, and then the crane was hoisted to build the steel columns in a predetermined position. It features a steel pillar construction method.

[0005]

As described above, according to the present invention, the right and left sprockets of the movable suspension block device for erection of the steel column mounted on the hook of the crane are individually or interlocked with each other to control forward / reverse rotation, brake stop, etc. To float horizontally in the air, then stand up the steel column in the air, remove the chain on the side that is fastened to the lower end of the loose steel column, and then hoist the crane to build the steel column at the specified installation position. Therefore, even in urban areas where it is difficult to secure a suitable space for both temporary placement and standing up, the steel columns that have been brought into the site can be built in place as they are. It is possible to prevent accidents that may cause harm by hitting the equipment or workers when the lower end rubs the ground as the steel column is lifted, and the lower end moves away from the ground, causing the steel column to swing significantly when the steel column is lifted. , Ensuring significant streamlining and safety engineering are achieved.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is an overall front view of a movable suspension block device for erection of a steel column of the present invention, and FIG. 2 is an overall side view of the movable suspension block device. In the figure, 1 is a movable suspension block device for erection of a steel column of the present invention, 2A and 2B are a pair of left and right sprockets axially supported by two parallel sprocket shafts 4A and 4B in a block case 3, and 5 are both sprockets. In the present embodiment, both sprockets 2A and 2B are sprocket shafts 4A and 4B.
The sprocket 2A, 2B is double-supported, and the chain 5 is also double hung on the double sprocket 2A, 2B, so that even if one chain 5 breaks, the suspended load will not be dropped. ing.

FIG. 3 shows an embodiment of the movable mechanism of the present movable suspension block device. In FIG. 3, the block case 3 and the double sprockets 2A, 2B shown in FIG. , Sprocket shafts 4A, 4B are shown in FIGS.
It is the same part as shown in. The other parts are distributed and arranged on the sprocket 2A side and the 2B side in the block case 3, and on the sprocket 2A side, the DC motor 6A, the electromagnetic brake 7A, and the worm speed reducer 8A are provided on the motor output shaft 9A and the sprocket. A clutch 10A and a sprocket 11A for interlocking with the sprocket shafts 4A and 4B are mounted on the shaft 4A. On the other hand, a DC motor 12B and a powder brake 13 are provided on the sprocket 2B side.
B, the electromagnetic brake 14B, the worm reducer 15B are mounted on the motor output shaft 16B, and on the sprocket shaft 4B, the clutch 17B and the sprocket 18B interlocking with the sprocket 11A of the sprocket shaft 4A are attached, and the sprocket 2A side motor The output shaft 9A and the sprocket 2B side motor output shaft 16B are connected via a clutch 19, and the interlocking chain 20 is hung on the sprocket shafts 4A and 4B interlocking sprockets 11A and 18B. The movable mechanism is remotely operated by a corded or cordless remote control device.

Hereinafter, the procedure of the method of constructing a steel frame column using the movable suspension block device for constructing a steel frame column will be described with reference to FIGS. 3 and 4 to 8. 1) The steel pillars 21 are stacked flat on the truck bed and carried to the site. At the same time, the movable suspension block device 1 is attached to the hook 22 of the tower crane, both sprockets 2A and 2B of the movable suspension block device 1 are simultaneously wound down, and the sprocket 2A side chain 5A of the movable suspension block device 1 is attached to the upper end of the steel column 21. Place the end of the sprocket 2B on the lower end of the steel column 21.
After the ends of the side chains 5B are respectively fastened, the hooks 22 of the tower crane are appropriately wound, and the steel columns 21 are floated substantially horizontally in the air (FIG. 4).

This control operation is performed by the sprocket 2A side motor output shaft 9A and the sprocket 2B side motor output shaft 16B.
, A sprocket shaft 4A,
4B each clutch 10A, 17B is turned off, each DC motor 6 of the sprocket 2A side and the sprocket 2B side.
The DC motors 6A and 12B are operated by turning on the power sources of A and 12B and driving them in the winding direction.
When the power is turned on, the electromagnetic brakes 7A and 14B on the sprocket 2A side and the sprocket 2B side are automatically turned off, and the rotations of the DC motors 6A and 12B are turned off on the sprocket 2A side.
And sprocket 2A via worm reducer 8A
On the sprocket 2B side, the powder brake 13B,
Both the sprocket 2B is rotated in the unwinding direction via the electromagnetic brake 14A that has been turned off and the worm speed reducer 15B. (The electromagnetic brake, when the motor power is on,
The braking action is turned on when the braking action is off and the motor power source is off. The electromagnetic brake referred to here is on and off, and the same applies hereinafter. The sprocket shafts 4A, 4B interlocking sprockets 11A, 18B do not rotate because the clutches 10A, 17B of the sprocket shafts 4A, 4B are turned off.

2) Next, the chain 5A on the sprocket 2A side of the movable suspension block device 1 is stopped, and the chain 5B on the sprocket 2B side is wound down until the steel column 21 is tilted by about 15 ° (FIG. 5). This control operation is performed on the sprocket 2A side motor output shaft 9A.
And the sprocket 2B side motor output shaft 16B are connected to each other, and the clutches 10A and 17B of the sprocket shafts 4A and 4B are continuously turned off.
Side DC motor 6A power off, sprocket 2B side D
The DC motor 1 is turned on by lowering the power source of the C motor 12B and turning it on.
2B in the lowering direction, the sprocket 2A is stopped by the electromagnetic brake 7A that is turned on, and the sprocket 2B is rotated by the DC motor 12A.
By B, the powder brake 13B, the electromagnetic brake 14B which is turned off, and the worm speed reducer 15B are rotated in the lowering direction. This operation is performed in order not to increase the tension applied to the chain.

3) Next, the chain 5A on the sprocket 2A side of the movable suspension block device 1 is wound up to the height at which the lower end of the steel frame column 21 does not touch the ground when the steel column 21 is raised, and the sprocket 2B side. Lower the chain 5B (Fig. 6). This control operation is performed on the sprocket 2A side motor output shaft 9A.
And the sprocket 2B side motor output shaft 16B are connected, and the clutches 10A and 17B of the sprocket shafts 4A and 4B are turned on, and the sprocket 2A side D
Turn on the power of the C motor 6A and turn on the sprocket 2
It is performed by rotating A in the winding direction, rotating the sprocket 2B in the winding direction by turning on the power source of the DC motor 12B on the sprocket 2B side, and rotating the sprocket 2B in the winding direction. Each sprocket 11 of the sprocket shafts 4A, 4B connected by 19 and by a chain 20
Since A and 18B are also connected to the sprocket shafts 4A and 4B by the on-clutch 10A and 17B, the sprockets 2A and 2B rotate integrally in the same direction, and the chain 5A on the sprocket 2A side is wound up, and the sprocket is spun. The chain 5B on the 2B side is unwound.

4) Next, the chain 5A on the side of the sprocket 2A is stopped and the chain 5B on the side of the sprocket 2B is further unwound, so that the steel column 21 becomes upright and the chain 5B loosens from the lower end of the steel column 21. Remove the chain 5B and wind the empty chain 5B to an appropriate position (FIG. 7). This control operation is performed on the sprocket 2A side motor output shaft 9A.
And the sprocket 2B side motor output shaft 16B are connected to each other, and the clutches 10A and 17B of the sprocket shafts 4A and 4B are turned off, and the sprocket 2A side DC motor 6A is turned off.
The sprocket 2A is braked by the electromagnetic brake 7A that has been turned on by driving the DC motor 12B in the lowering direction by lowering the power source of the side DC motor 12B to the lower side and turning on the DC motor 12B.
By A, the powder brake 13B, the electromagnetic brake 14A which is turned off, and the worm speed reducer 15B are rotated in the lowering direction. Then, when the chain 5B on the sprocket 2B side is slackened, the DC motor 12B is turned off to stop the drive, the chain 5B is removed from the lower end of the steel column 21, the DC motor 12B is wound up and turned on, and the empty chain 5B is appropriately wound up. By turning off the DC motor 12B, the empty chain 5B is braked.

5) After the above operation is completed, the hook 22 of the tower crane is hoisted up to install the steel frame column 21 in a predetermined position, and the above operation is repeated to continue the installation of the steel frame column 21 (FIG. 8). If the rotation speed of the motor output shaft 16B exceeds the predetermined rotation speed during the above operation, the powder brake 13B acts as a safety device to automatically prevent the motor output shaft 16B from excessively rotating. Reference numeral 23 in FIG. 4 to FIG. 8 denotes a remote-controlled suspender that allows the sling to be removed remotely.
Although the chains at the upper and lower ends can be attached on the ground, the chains at the upper end of the built-in steel column 21 must be removed by climbing up to the top of the steel column 21 which has a bad footing. The reason for this is that by using this remote-controlled hanging device for the pillar head, the chain can be easily removed without going up to a dangerous high place, and the safety of the worker is ensured. Also, both sprockets 2A, 2
If the chain that slackens between B and hangs down the work, a chain tray 24 as shown in FIG. 3 may be provided at the bottom of the block case 3 to receive the middle part of the slack chain. Good. In addition, in the embodiment, a pair of left and right sprockets 2 is prepared in case of cutting the chain 5.
Although A and 2B are doubled, respectively, of course, it does not matter if they are single.

[0014]

As described above, according to the present invention, the left and right sprockets of the movable suspension block device for erection of steel columns mounted on the hooks of the crane are individually or interlocked to control the forward / reverse rotation, the brake stop, and the like. Then, float the steel column horizontally in the air, then raise the steel column in the air, remove the chain that is fastened to the lower end of the loose steel column, and then hoist the crane to position the steel column in place. Since it is built in, there is no need for extra work equipment such as a material handling crane for unloading or temporarily placing steel columns that have been brought into the field, or a phase suspension crane to prevent swinging of suspended loads. Even in an urban area where it is difficult to secure an appropriate space for standing upright, it can be built in place as it is.In addition, like the conventional sling wire construction, the lower end part can be lifted as the steel column is lifted. Pulls the ground In this way, it is possible to prevent accidents that may cause damage to the equipment and workers due to the large swing of the steel column when the lower end moves away from the ground, and to achieve significant efficiency and safety of work. Is.

[0015]

[Brief description of drawings]

FIG. 1 is an overall front view of a movable suspension block device for erection of a steel column of the present invention.

FIG. 2 is an overall side view of the movable suspension block device.

FIG. 3 is a schematic plan view showing an example of a movable mechanism of the movable suspension block device.

FIG. 4 is an elevational view of a process in which steel columns that are stacked flat on a truck and delivered to the site are delivered to the movable suspension block device, and the steel columns are floated substantially horizontally in the air.

FIG. 5 is an elevational view of a process in which the chain on the lower side of the steel column is subsequently unwound and the steel column is raised.

FIG. 6 is an elevational view of a process in which the chain on the upper side of the steel column is rolled up and the chain on the lower side is rolled down to raise the steel column.

FIG. 7 is an elevation view of a process in which the steel column is completely raised in the air and the chain on the lower side of the steel column is removed.

FIG. 8 is an elevational view of a process of subsequently winding up the tawaren and erection of the steel frame column at a predetermined position.

[0016]

[Explanation of symbols]

 1 Movable suspension block device 2A, 2B sprocket 3 Block case 4A, 4B Sprocket shaft 5, 5A, 5B Chain 6A, 12B DC motor 7A, 14B Electromagnetic brake 8A, 15B Worm reducer 9A, 16B Motor output shaft 10A, 17B, 19 Clutch 11A, 18B Sprocket Axle interlocking sprocket 13B Powder brake 20 Sprocket interlocking chain 21 Steel column 22 Tawerren hook 23 Remote control hanging 24 Chain tray

Claims (4)

[Claims] 1. A chain is hung on a pair of left and right sprockets pivotally supported by two parallel sprockets in a block case, with the chain being loosened between the sprockets, and the left and right sprockets are individually driven by a movable mechanism. Alternatively, a movable suspension block device for erection of a steel column is characterized in that it can be controlled so as to rotate forward and backward and stop the brake freely in conjunction with it. 2. A chain is hung on a pair of left and right sprockets pivotally supported by two parallel sprockets in a block case, with the chain being loosened between the sprockets, and the left and right sprockets are independently driven by a movable mechanism. Or, the movable suspension block device for erection of steel columns that can be controlled to rotate forward / reversely and brake freely in conjunction with it is attached to the hook of the crane, and both ends of the two chains hanging from the movable suspension block device are placed flat. After fastening to the upper and lower ends of the steel column, the left and right sprockets are individually or interlocked to control forward / reverse rotation and brake stop, so that the steel column floats almost horizontally in the air. Stand up in the air, remove the chain on the side that is fastened to the lower end of the steel column, and then hoist the crane to build the steel column in place. The method for constructing a steel column using the movable suspension block device for constructing a steel column according to claim 1, wherein 3. A pair of left and right sprockets pivotally supported by the two parallel sprockets are supported on the sprockets in a double manner, and a chain is doubled on the double sprockets. The movable suspension block device for erection of a steel column according to item 2. 4. The movable suspension block for erection of a steel column according to claim 1, wherein a tray for accommodating a chain that hangs freely is provided between the left and right sprockets in the block case. apparatus.