JPH0859174A - Movable suspension jig for steel frame erection, and method for locating steel frame using the jig - Google Patents

Abstract

PURPOSE: To locate the steel frame at the prescribed position by fitting a hook device to upper and lower end parts of the steel frame stocked on the load- carrying platform of a truck, etc., and suspending the steel frame by a crane to be erected in the air. CONSTITUTION: A jig body 2 is suspended by a crane, and first and second hook devices 18, 16 suspended from the jig body 2 are respectively fitted to an upper end part 34b and a lower end part 34a of the steel frame 34 stocked on the load-carrying platform of a truck, etc. A movable suspension jig 1 for steel frame election is suspended by the crane to the prescribed height to position the steel frame 34 in the air. Then, sprockets 5, 7 are turned and controlled to erect the steel frame 34 in the air through the feeding operation of a chain 15. After the second hook device 16 fitted to the lower end part 34a of the steel frame 34 is removed, the steel frame 34 is located to the prescribed position by the crane. By this the steel frame 34 can be directly located at the prescribed position without being temporarily placed on the ground, etc., from the load-carrying platform of the truck, etc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel frame erection movable hanging jig suitable for erection of a steel frame at a predetermined position on a construction site, and a steel frame erection method using the same.

[0002]

2. Description of the Related Art As is well known, a building structure having an S structure is suitable for a high-rise building since the building structure can have a flexible structure. Construction of steel frames at these construction sites and the like is generally performed as follows.
A steel frame is horizontally loaded on a loading platform such as a truck, and the steel frame is carried into the construction site by the truck or the like. This steel frame is unloaded from the loading platform on the ground by a handling crane, etc. and temporarily placed. A sling wire is hung on the upper end of the steel frame, and the steel frame is erected by hoisting the wire with a tower crane, and the steel frame is built up by hoisting it to a predetermined position.

[0003]

By the way, it is difficult to secure a sufficient space for work such as a place to stand up or a place to temporarily put in a place where buildings and the like are close to each other, such as an urban area. In some cases, non-productive procedures such as temporarily placing the carried-in steel frame on the assembled steel frame were involved. Also, when raising a steel frame that has been laid on the ground, only the upper end of the steel frame is hoisted, so the lower end rubs the ground, and when the lower end moves away from the ground, the steel frame shakes greatly, which is dangerous. Was there. In the field, you have to adopt a method such as using a suspension crane in order to suppress such rocking and prevent danger.
There was a problem in its workability. Also, although hooks could be attached to both ends of the steel frame on the ground, removing the sling from the upper end of the steel frame after building it is a work at a high place, which is a safety and workability problem. was there.

The present invention has been made in view of the above-mentioned problems, and even in a narrow space, the steel frame can be erected and erected at a predetermined position without unloading and temporary placement, and the steel frame can be installed. Movable hanging jig for steel-frame erection that can be safely built without rocking significantly when hoisting or standing up, and can safely remove the sled of the built-in steel frame, and steel frame using this The purpose is to provide a building method.

[0005]

The present invention has the following features to attain the object mentioned above. That is, in the movable hoisting jig for steel erection according to claim 1, a jig main body hung by a crane, a sprocket rotatably supported by the jig main body with a horizontal axis, and the jig main body. A drive mechanism that is mounted on the sprocket to rotate and drive the sprocket, a chain that is wound around the sprocket and has one end thereof held on the jig body side, and a first chain that is suspended at the other end of the chain. Of the hook device and the chain that is hung from the sprocket to the jig body, and is hung from the chain by the first pulley that winds the chain and engages with the chain. It is characterized by comprising a second hook device.

According to a second aspect of the present invention, there is provided a steel frame erection movable suspension jig according to a first aspect of the present invention.
The jig body is provided with a second pulley and the first pulley is provided.
A hook device is provided with a third pulley, and the other end side of the chain drawn out from the sprocket is wound around the third pulley and the second pulley in this order, and then the first pulley.
It is characterized by being fixed to the hook device. The movable suspension jig for steel erection according to claim 3 is the movable suspension jig for steel erection according to claim 1 or 2, wherein one end of the chain is provided in the jig main body, It is characterized by being held by a chain feeding device for feeding and storing.

According to a fourth aspect of the present invention, there is provided a steel frame erection movable suspension jig according to any one of the first to third aspects of the present invention. And a remote control device for remotely operating the automatic sling release mechanism. In the method for constructing a steel frame according to claim 5, the movable suspension jig for constructing a steel frame according to claim 1 is attached to a hook of a crane, and is lifted by the crane and suspended from the movable suspension jig for constructing a steel frame. The first hook device and the second hook device are fastened to the upper end and the lower end of the flat steel frame, respectively, and then the movable hoisting jig for steel frame erection is lifted to a predetermined height by the crane, The steel frame is positioned in the air, the sprocket is rotationally controlled by the drive mechanism, and the chain is fed to raise the steel frame in the air, and the second frame is fastened to the lower end of the steel frame. The method of using a movable hanging jig for steel frame erection according to claim 1, wherein the hook device is removed and the steel frame is built.

[0008]

In the movable hoisting jig for erection of steel frame according to claim 1,
First, the jig body is suspended by a crane, and the first and second hook devices suspended from the jig body are
Fasten to the upper and lower ends of the steel frames that are flatly stacked on the bed of trucks, etc. Then, the movable hoisting jig for erection of steel frames is hoisted up to a predetermined height by a crane to position the steel frames in the air. Then, the sprocket is rotationally controlled by the drive mechanism and the chain is fed to raise the steel frame in the air, and the second hook device fastened to the lower end of the steel frame is removed. After that, the steel frame is erected at a predetermined position with a crane. In this way, it is possible to directly build it in a predetermined position from a loading platform such as a truck without temporarily placing it on the ground or the like.

In the steel frame erection movable hoisting jig according to claim 2, one chain is hung on each pulley,
The second pulley is a fixed pulley with respect to the jig body, and the second and third pulleys are movable pulleys provided in the second and first hook devices, respectively. As a result, the ratio of the first hook device being wound up by the sprocket rotation and the second hook device being wound down is 2: 3. Therefore, as the first hook device is wound up and raised, the chain hanging angle at the sprocket (that is, the chain formed between the first hook device and the sprocket and the chain formed between the second hook device and the sprocket) is increased. Angle) becomes smaller. Therefore, the chain tension related to the sprocket is reduced.

In the steel frame erection movable hoisting jig according to the third aspect, one end of the chain is held by the chain unwinding device provided in the jig body, so that the chain can be unwound and stored freely. That is, at the time of work, the chain can be paid out by the chain pay-out device so as to have a predetermined length, and at the end of the work, the chain can be stored. In the movable hoisting jig for constructing a steel frame according to claim 4, since the first hook device is an automatic sling release mechanism equipped with a remote control device, after the steel frame is built up, the The hook device can be removed from the upper end of the steel frame.

In the steel frame building method according to the fifth aspect, the procedure of temporarily placing the steel frame is not required by suspending and operating the movable steel frame erection jig according to the first aspect with a crane. Therefore, the steel frame can be built in a predetermined position without using a material handling chain, a suspension chain, or the like.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to FIGS. In the drawings, reference numeral 1 denotes a steel frame erection movable hanging jig (hereinafter referred to as a hanging jig). Both ends of the auxiliary chain 3 are fixed to the upper part of the jig main body 2 which constitutes the outer frame of the hanging jig 1.
An intermediate portion of the above is hooked on a hook 4 of a tower crane (not shown). Inside the jig body 2, there are a first chain block 6 having a first sprocket 5 (sprocket), a second chain block 8 having a second sprocket 7, and a main body side pulley 9 (second pulley). It is set up.

The first chain block 6 is rotatably provided with a first sprocket 5 having a horizontal axis, and a motor (not shown) is incorporated as a drive mechanism for rotationally driving the first sprocket 5. Has been done. The second chain block 8 is provided with a second sprocket 7 having an axis parallel to the axis of the first sprocket 5.
A motor (not shown) for rotationally driving the second sprocket 7 is built in. This second chain block 8
The upper part of the support part 10 provided inside the jig body 2,
It is rotatably supported via a pin 10a. Also,
Below the second chain block 8, a chain storage box 13 is suspended and installed. The chain storage box 13 and the second chain block 8 form a chain feeding device 12. The main body side pulley 9 is
A support member 14 is rotatably supported by an axis parallel to the axis of the first sprocket 5, and the upper portion of the support member 14 is supported by a support portion 10 provided inside the jig body 2 along the axis of the body-side pulley 9. It is rotatably supported so as to have an axis parallel to.

One end portion 15a of the chain 15 is held in the chain storage box 13, and the chain 15 extended from the chain storage box 13 is attached to each of the second sprocket 7 and the first sprocket 5. It is hung. A second hook side pulley 17 (first pulley) provided on the second hook device 16 is suspended between the second sprocket 7 and the first sprocket 5 of the chain 15. In this case, the chain 15 is wound around the second hook side pulley 17. Further, the other end 1 of the chain 15 derived from the first sprocket 5
The 5b side is wound on a first hook side pulley 19 (third pulley) provided on an automatic shackle device 18 which is a first hook device and having an axis line in the horizontal direction, and further wound on a main body side pulley 9. Then, it is fixed to the upper part of the automatic shackle device 18.

One end of a wire 25 and an air pipe 26 are attached to the lower portion of the control box portion 20, and a hook body 27 is provided at the other end of both. Air pipe 2
One end of 6 is connected to an air tank (not shown) in the control box unit 20, and the other end is connected to the hook body 27.
Via the solenoid valve (not shown) built into the hook body 2
It is arranged to open and close the pin 28 of No. 7 by air pressure. The automatic shackle device 18 is set to function as an automatic sling release mechanism that allows the sling of the hook body 27 to be freely removed by remote control by the shackle remote controller 29 (remote control device).

In the above structure, the main body pulley 9 and the first pulley
The sprocket 5 and the second sprocket 7 function as a constant pulley as described later, and the first hook-side pulley 19
And the second hook side pulley 17 functions as a moving pulley.
One end 15a of the chain 15 is housed in the chain housing box 13, and the other end 15b is fixed to the control box unit 20. With these configurations, the first
Shackle device 18 by rotating the sprocket 5
The ratio of the hoisting and the hoisting of the second hook device is 2: 3. The motors respectively built in the first chain block 6 and the second chain block 8 are set so that they can be remotely operated by a main body operation remote control device (not shown). A battery 30 is installed on the supporting portion 10 inside the jig body 2 as a power source for driving the first chain block 6 and the second chain block 8.

The procedure of the steel frame erection method using the above-mentioned steel frame erection movable suspension jig will be described below. First, the steel frame 34
After placing it flat on a loading platform such as a truck and bringing it to the site,
Splice plates 35 and 36 are tightly connected and fixed to the lower end portion 34a and the upper end portion 34b of the steel frame 34 by bolts (not shown). Then, the lower end portion 34a of the steel frame 34
The sling wire 37 is installed on the splice plate 35 fixed to the. On the other hand, the hook 4 of the tower crane is attached to the auxiliary chain 3 on the jig body 2, and the hanging jig 1 is hoisted by the tower crane. The first chain block 6 and the second chain block 8 are operated by the remote controller for operating the main body, and the chain 15 is drawn out of the hanging jig 1 to a predetermined length from the chain storage box 13 and the automatic shackle device 18 and The second hook device 16 is lowered to a predetermined position.
The pin 28 of the hook body 27 of the automatic shackle device 18 is inserted into the bolt hole of the splice plate 36 fixed to the upper end 34b of the steel frame 34, and the hook body 27 is fastened. Further, the second hook device 16 is hooked and fastened to the sling wire 37 attached to the splice plate 35 fixed to the lower end portion 34 a of the steel frame 34.

Next, as shown in FIG. 2, the hook 4 of the tower crane is wound up, the steel frame 34 is appropriately hung up to a height in consideration of its length, and the steel frame 34 is placed in the air in a substantially horizontal state. Then, as shown in FIGS. 3 and 4, the first chain block 6 is actuated by the main body operating remote control device to wind up the automatic shackle device 18, and the chain 15
The steel frame 34 is erected vertically by feeding. At this time, the ratio of the winding of the automatic shackle device 18 by the rotation of the first sprocket 5 and the lowering of the second hook device is 2: 3. Therefore, the lowering of the second hook device 16 is larger than the lowering of the automatic shackle device 18. For example, when the first sprocket 5 is rotated clockwise by 6 m by the first chain block 6 in FIG. 2, the distance between the first sprocket 5 and the automatic shackle device 18 is shortened by 2 m, and In addition, the distance between the first sprocket 5 and the second hook device 16 is increased by 3 m. Therefore, the upper end portion 34b of the steel frame 34 on the automatic shackle device 18 side is about 2 m.
Ascending, the lower end portion 3 of the steel frame 34 on the second hook device 16 side
4a descends about 3m. As described above, since the second hook device 16 descends more than the automatic shackle device 18 ascends, the chain suspension angle θ on the first sprocket 5 is increased.
(That is, the angle θ formed by the chain 15 between the automatic shackle device 18 and the first sprocket 5 and the chain 15 between the second hook device 16 and the first sprocket 5) is the automatic shackle device. As 18 is rolled up, it becomes smaller.

As shown in FIG. 4, after the steel frame 34 is vertically erected, the second hook device 16 is detached from the sling wire 37 attached to the splice plate 35 at the lower end 34a of the steel frame 34, and the sling wire is attached. 37
Is also removed from the lower end 34a. The removed second hook device 16 operates the second chain block 8 by the main body operation remote control device, winds it up, and stores the extra chain 15 in the chain storage box 13. Next, the hook 4 of the tower crane is rolled up, the steel frame 34 is built in a predetermined position, and then the shackle remote controller 2
9 is operated to pull out the pin 28 of the hook body 27 from the bolt hole of the splice plate 36. As a result, the automatic shackle device 18 is removed from the upper end portion 34b of the steel frame 34. All steel frames are built by repeating the above operation. After all the assembling work is completed, the second chain block 8 is operated by the remote control device for operating the main body to wind up the automatic shackle device 18, and the unwound chain 15 is pulled out of the chain storage box 13
Store inside.

As described above, according to the above-mentioned method, the steel frame 34 can be built without using a material handling crane, a phase suspension crane, etc., and can be temporarily placed on the ground or assembled steel frame even in a confined place. The steel frame 34 can be built without doing so. Then, the work of detaching the hook body 27 from the upper end 34b of the steel frame 34 after being built is performed remotely by the shackle remote control device 29, so that it can be safely performed on the ground or the like without climbing to a high place.

Further, as described above, as the automatic shackle device 18 is wound up, the chain suspension angle θ on the first sprocket 5 becomes smaller, so the chain tension on the first sprocket 5 is reduced and stable hoisting is possible. You can do it. Then, the first chain block 6 simultaneously winds the automatic shackle device 18 and the second hook device 16 and lowers the lower end portion 34 a of the steel frame 34.
Is used for the ascending force of the upper end portion 34b of the steel frame 34. As a result, the motor drive power of the first chain block 6 required to raise the steel frame 34 is increased by the steel frame 3
4 can be greatly reduced as compared with a case where the position of the lower end 34a of No. 4 is fixed and only the upper end 34b is raised. Therefore, the capacity of the battery 30, which is the driving power source, can be reduced. The shackle remote controller 29
The remote controller for operating the main body may be either a cordless remote controller or a remote controller with a cord.

[0021]

As described above, in the movable hoisting jig for constructing a steel frame according to the first aspect, the first hook is provided at each of the upper end and the lower end of the steel frame flatly stacked on the bed of the truck or the like. The device and the second hook device can be fastened, and the crane can be lifted by the crane for erection of the steel frame erection and the steel frame can be positioned in the air. The steel frame can be raised in the air by controlling the rotation of the sprocket, and the steel frame can be built in a predetermined position. This saves time and effort for temporary placement on the ground, improves workability, and significantly reduces work time. Further, since both ends of the steel frame can be supported by the hooks and can be erected in the air, the steel frame can be safely erected without significantly swinging.

Further, since the first hook device and the second hook device are simultaneously wound up by the rotation of the sprocket, the lowering force of the lower end portion of the steel frame contributes to the ascending force of the upper end portion thereof. As a result, the drive power of the sprocket required to raise the steel frame can be significantly reduced as compared with the case where the lower end portion of the steel frame is fixed and only the upper end portion is raised. Therefore, the capacity of the battery built in the jig body can be significantly reduced, and the battery itself can be downsized.

The movable hoisting jig for steel erection according to claim 2 is the movable hoisting jig for steel erection according to claim 1,
The jig body and the first hook device are provided with a second pulley and a third pulley, respectively. Since the chain derived from the sprocket is wound in the order of the third pulley and the second pulley and then fixed to the first hook device, the first hook device is wound by rotating the sprocket and the second hook device is wound. The lowering ratio of the hook device is 2: 3. As a result, the second hook device descends more than the first hook device ascends, and the chain hanging angle θ on the sprocket becomes smaller as the first hook device is wound up. Therefore, as the chain suspension angle θ becomes sharper, the chain tension on the sprocket decreases,
Stable winding can be performed.

The movable hoisting jig for steel erection according to claim 3 is the movable hoisting jig for steel erection according to claim 1 or 2, wherein the chain feeding device has one end of the chain provided in the jig main body. Since it is held, the chain can be pulled out and stored as needed. Therefore, at the time of work, the length of the chain can be appropriately controlled according to the length of the steel frame and the like, and at the end of the work, the chain can be stored. As a result, workability can be further improved.

According to a fourth aspect of the present invention, there is provided a steel frame erection movable suspension jig according to any one of the first to third aspects, wherein the first hook device is a remote control device for automatically hooking a hook body. Since the release mechanism is used, the hook body at the upper end of the steel frame can be removed by remote control. Therefore, after the steel frame has been built, the remote control device can be operated on the ground or the like without climbing to a high place, and the hook body fastened to the upper end of the steel frame can be safely removed. As a result, it is possible to improve work safety, save time and labor required to reach a high place, and improve work efficiency.

The method of constructing a steel frame according to claim 5 is a procedure in which the movable suspension jig for constructing a steel frame according to claim 1 is lifted by a crane, the steel frame is raised in the air, and then the steel frame is built up. The procedure of temporarily placing it on the ground can be omitted. Therefore, there is no need for a procedure using a hanging crane or a material handling crane. As a result, it is possible to greatly simplify the work when installing the steel frame and shorten the work time.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of a steel frame erection movable hanging jig of the present invention.

FIG. 2 is a front view showing a state in which a steel frame is horizontally hung by an embodiment of the steel frame erection movable hanging jig of the present invention.

FIG. 3 is a front view showing a state where the steel frame is being raised by an embodiment of the movable hoisting jig for constructing a steel frame of the present invention.

FIG. 4 is a front view showing a state in which a steel frame is vertically erected by an embodiment of the steel frame erection movable hanging jig of the present invention.

[Explanation of symbols]

 1 Movable hanging jig for steel erection 2 Jig body 4 Tower crane hook 5 1st sprocket 6 1st chain block 7 2nd sprocket 8 2nd chain block 9 Main unit side pulley 10 Chain storage box 12 Chain feeding device 15 chain 15a one end of chain 15b other end of chain 16 second hook device 17 second hook side pulley 18 automatic shackle device 19 first hook side pulley 27 hook body 29 remote control device for shackle 34 steel frame 34a lower end of steel frame 34b Upper end of steel frame

Claims (5)

[Claims] 1. A jig main body hung by a crane, a sprocket rotatably supported by the jig main body with a horizontal axis, and a drive mechanism mounted on the jig main body for rotationally driving the sprocket. A chain wound around the sprocket, one end of which is held on the jig body side, a first hook device suspended from the other end of the chain, and the jig body extending from the sprocket to the jig body. A second hook device that is suspended by the chain during the course of the process, and is suspended from the chain by the first pulley that winds the chain and engages with the chain. A characteristic movable jig for steel frame erection. 2. The movable suspension jig for erection of a steel frame according to claim 1, wherein the jig main body is provided with a second pulley.
A hook device is provided with a third pulley, and the other end side of the chain drawn out from the sprocket is wound around the third pulley and the second pulley in this order, and then the first pulley.
Movable hanging jig for steel frame erection characterized by being fixed to the hook device. 3. The movable hanging jig for steel frame erection according to claim 1 or 2, wherein one end of the chain is provided on the jig main body and is held by a chain feeding device for feeding and storing the chain. It is a movable hanging jig for steel frame erection that is characterized. 4. The movable hanging jig for steel frame erection according to any one of claims 1 to 3, wherein the first hook device includes an automatic sling release mechanism of the hook body and a remote sling automatic release mechanism. A movable hanging jig for steel frame erection, comprising a remote control device to be operated. 5. A first hook device mounted with the movable hanging jig for steel frame erection according to claim 1 and being lifted by the crane and hung from the movable hanging jig for steel frame erection. The second hook device and the second hook device are fastened to the upper end and the lower end of the steel frame placed flat, respectively, and then the movable lifting jig for steel frame erection is lifted to a predetermined height by the crane to position the steel frame in the air. Then, the sprocket is rotationally controlled by the driving mechanism, the chain is fed to raise the steel frame in the air, and the second hook device fastened to the lower end of the steel frame is removed, The method for constructing a steel frame using a movable suspension jig for constructing a steel frame according to claim 1, wherein the steel frame is built up.