JPS63119984A - Suspending method utilizing stud and stud fitting device - Google Patents

Abstract

PURPOSE:To make a suspending work safe and sure by fitting a device main body providing with a fixing device, a welding surface working device, welding device, etc., to an object to be suspended by a remote control and then, fixing a stud on the object to be suspended by the remote control. CONSTITUTION:A movable stud fitting device 1 via a crane 5, etc., by the remote control is provided and the device main body 3 is composed of the fixing device 9, the welded surface working device 15, the welding device 17 and a changeover device 13. First, the device main body 3 is fixed on a work 11 by the fixing device 9 and the welding surface is first worked by the remote control by the working device 15 via the changeover device 13 and then, the stud is welded and fixed to the work 11 by the welding device 17. Since the stud is fitted by the remote control and the work 11 is suspended with the stud as a jig, the suspending work can be made safe and sure.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The invention set forth in claim 1 (hereinafter referred to as the first invention) provides high-radiation tJJ! The present invention relates to a method using studs suitable for lifting objects to be suspended, such as steel materials, under adverse environments such as under a heavy load or under a poisonous gas atmosphere. The second invention) relates to a stud attachment device suitable for attaching a stud.

(Prior Art) Generally, in order to carry out lifting work of structures or steel materials, etc., a lifting jig such as a 1 m friction clamp, a suction jig using a magnet, an eye bolt or a hanging ear is used.

Among these, when using a friction clamp, if a structure has a protrusion, the friction type clamp will come into contact with this protrusion, and there is a possibility that the friction type clamp will not be able to reliably grip the structure. In addition, when using an adsorption jig that uses magnets, there is a risk that the structure may fall due to insufficient adsorption, and when cutting steel materials using a large current, the residual magnetism after cutting may occur. There is also a possibility that magnetic adsorption cannot be achieved reliably due to the influence of

Therefore, in order to ensure the reliability and safety of lifting work of steel materials, etc., it is optimal to use a lifting jig such as the above-mentioned eye bolt. However, in this case, a worker needs to attach a lifting jig to the object to be suspended, such as steel material, before lifting.

(Problem to be solved by the invention) However, the coating of steel materials, etc.! ! If the object is a cut steel material for a reactor pressure vessel or a steel material in a toxic gas atmosphere, the worker should approach the steel material, etc. and attach a lifting jig such as a hanging ear to the steel material. I can't. Therefore, it is necessary to attach the lifting jig by remote control.

Generally, in order to attach an eyebolt to a suspended object, it is first necessary to sequentially drill a prepared hole for the eyebolt, tap it, and screw the eyebolt into the suspended object.

Therefore, in order to carry out a series of these processes by remote control, the equipment that assembles these processes becomes large.
Not suitable for working in confined spaces.

Furthermore, generally, in order to attach the hanging ear to the suspended object, the welding torch must be moved in a complicated manner. Therefore, it is very difficult to remotely control this complicated operation, and even if remote control is performed, there is a possibility that a good welding state cannot be obtained.

The first and second inventions were made in consideration of the above facts, and the first invention utilizes a stud as a lifting jig that can be reliably attached to an object to be suspended by remote control. It is an object of the present invention to provide a lifting method using studs that can safely and reliably carry out lifting work of suspended objects in the environment.

A second object of the invention is to provide a stud attachment device that can attach a stud to a workpiece such as a suspended object by remote control.

[Structure of the invention]

(Means for Solving the Problems) A first aspect of the present invention is to install a stud in an object to be suspended, and use the stud as a lifting jig to lift the object to be suspended.

The second invention provides a device main body that is movable by remote control, a fixing device that is attached to the device main body and fixes the 822 main body to the workpiece, and a switching device that connects the device body to the device main body through a switching device. a welding surface processing device that is attached to process the welding surface of the workpiece; a welding device that is attached to the device main body via the switching device and welds a stud to the welding surface processed by the welding surface processing device; , a control device for remotely operating the movement of the device main body, the fixing device, the switching device, the welding surface processing device, and the welding device, and the switching device is located at a position facing any surface of the workpiece. The welding surface processing device or the welding device can be selectively set.

(Function) Therefore, according to the lifting method using studs according to the first invention, since the stud installation work is simple, the studs can be installed on the suspended object by remote control,
It is possible to safely and reliably perform lifting work of a suspended object under a poor environment such as a high radiation M environment.

Further, the stud attachment device according to the second invention first moves the device main body to the position of the workpiece such as a suspended object by remote control, fixes the device main body to the workpiece with a fixing device, Next, the switching device is activated to place the welding surface processing device facing the welding surface of the workpiece to process the welding surface, and then the switching device causes the welding device to be placed facing the welding surface of the workpiece to process the welding surface. Weld the stud to the welding surface. All of these operations are performed remotely.

(Example) Embodiments of the present invention will be described below based on the drawings.

In order to lift steel materials or structures with high radiation levels, such as cut steel materials of nuclear reactor pressure vessels, or steel materials or structures that are in a toxic gas atmosphere, first attach studs to these steel materials or other objects to be suspended. Attach by remote control. Next, this stud is used as a lifting jig, and a lobe or a hanging tool such as a hook is engaged with the head of the stud to lift and move the suspended object. Everything from installing the studs to lifting and moving the suspended object is performed automatically or manually by remote control.

According to one embodiment of the above-mentioned lifting method using studs, since the studs are easy to attach, the studs can be installed on the suspended object by remote control. Therefore, if the suspended object has a high rate of release, such as the cut steel of a reactor pressure vessel, or if the suspended object exists in a toxic gas atmosphere, workers may be forced to go to the above-mentioned poor environment. There is no need to install a lifting jig. Therefore, lifting work can be carried out safely and reliably.

On the other hand, to attach a stud to a suspended object by remote control, a stud attaching device shown in FIGS. 1 to 4 is used. FIG. 1 is a schematic diagram of an embodiment of a stud mounting device, and FIGS. 2 to 4 are detailed diagrams thereof.

The device main body 3 of the stud mounting device 1 shown in FIG. 1 is provided so as to be movable by remote control using a crane 5 or the like. Also, a fixing device l! is connected to the device main body 3 via a rod 7! 9 is attached. This fixing device 9 fixes the device main body 3 to a workpiece 11 as a suspended object.

A switching device 13 is provided in the device main body 3 so as to be movable with respect to the device main body 3. This switching device 13 is provided so that a welding surface processing bag δ15 or a welding device 17, which will be described later, can be selectively set at opposing positions on any same surface of the workpiece 11.

The switching device 13 includes a welding surface processing device 15 and a welding device 1.
7 is arranged. The welding surface processing device 15 is connected to the switching device 13
The tool grinds or cuts the welding surface of the tool 15A, the motor 15B, and the tool feeder ff15G. In addition, the welding device 17 receives welding current from the welding power supply device 19, so that the welding surface processing bag fi! 21
The stud is welded to the welding surface processed in step 5. This welding equipment! 217 is composed of a stud welder 17A and a welder pressing device 17B.

The welding device 21 is provided to remotely move the device main body 13 and remotely control the operation of the fixing device 9, the switching device 113, the welding surface processing device 15, the welding device 17, the welding power supply device 19, and the like.

The stud attachment device 1 will be explained in more detail.

The main body 3 of the device is assembled from I-beam steel as shown in Fig. 2, and there is a hanger for hanging at the upper part in the figure.
j25 is installed. A rod 7 is attached to the bottom surface of this device body 3.
are placed vertically facing each other. At the lower end of the rod 7, I! is attached as a fixing device 9! ! AR type crane clamp 2 is installed.

As shown in FIG. 4, the friction type clamp 27 includes a bifurcated clamp body 29, a clamping hydraulic cylinder 31 and a clamp claw 33 installed inside the clamp body 29.

The clamp claw 33 has an abbreviated shape, and the clamp body 29
and is fixed to the piston of the clamp hydraulic cylinder 31. Therefore, a! In the rubbing type clamp 27, after the clamp main body 29 is lowered to sandwich the workpiece 11, the clamping hydraulic cylinder 31 is operated to rotate the clamp claw 33, and the tip of the clamp claw 33 is attached to the workpiece 11. The device main body 3 is fixed to the workpiece 11 by pressing it. This fixation prevents the device main body 3 from shifting relative to the workpiece 11 even due to vibrations caused by the operation of the welding surface grinding device 42, which will be described later.

Also, r! l The friction type clamp 27 includes a clamp body 29.
A landing detector 35 is installed at the base of the fork. This landing detector 35 detects that the stud mounting device 1 has descended and the friction type clamp 27 has reached the proper position on the workpiece 11. This detection signal is the ill all device 21
At the same time, the operation of the friction type clamp 27 is υIt! It outfit! 1IIJIIl by 21.

As shown in FIG. 2, a rail 37 is installed on the lower surface of the device main body 3 between the opposing rods 1.

This rail 37 extends perpendicularly to the straight line connecting the two rods 7 (see FIG. 3). A slide member 39 is locked to the rail 37, and this slide member 39
7 so as to be movable in the longitudinal direction.

The slide member 39 includes a standing plate 41A and a standing plate 41A.
, and an upper plate 41G fixed to the upper part of the upright plate 41A and the side plate 41B. Surrounded by these plates 41A, B, and C, a welding surface grinding device 42 as a welding surface processing device 15 is disposed. As shown in FIGS. 3 and 4, the welding device 17 is installed on the opposite side of the welding surface grinding device W142 across the standing plate 41A.

Furthermore, a switching air cylinder 43 is disposed on the lower surface of the device main body 3, as shown in FIG. The switching air cylinder 43 is provided with its longitudinal direction extending in the direction in which the rail 37 extends. The tip of the piston rod of the switching air cylinder 43 is connected to the upper plate 41 of the slide member 39 via the mounting plate 47.
Fixed at G. Therefore, the switching air cylinder 43
The slide member 39 is slidably provided on the rail 37 by the operation of the slide member 39 . The switching device 13 (
(see Figure 1) are configured, and these 39.43 operations are performed by I
It is controlled by the 1m device t21. By operating the switching air cylinder 43, the welding surface grinding device @42 or the welding device 17 can be selectively set on the same surface of the workpiece 11.

As shown in FIG. 2, the welding surface grinding device 42 includes a grinding device main body 49 and a motor 1 installed in the grinding device main body 49.
5B and a grindstone 51 as a tool 15A connected to this motor 15B, and rails 53 are formed on both sides of the grinding device main body 49. This rail 53 extends in the vertical direction and is slidably locked to the side plate 41B of the slide member 39. In addition, the upper plate 4 of the slide member 39
A grinding hydraulic cylinder 55 is installed vertically at 1C, and a grinding device main body 49 is fixed to its piston rod.

Therefore, the grinding device main body 49 is provided so as to be movable in the vertical direction with respect to the slide member 39 by the operation of the grinding hydraulic cylinder 55. The rail 53 and the grinding hydraulic cylinder 55 function as the tool feeding device 15C (see FIG. 1).

Further, a load supporting member 57 is installed between the upper plate 41G of the slide member 39 and the bond cutting equipment U main body 49. This load support member 57 has a spring disposed therein, and the weight of the grinding device main body 49, motor 15B, grindstone 51, etc. is supported by the slide member 39 by this spring.

Further, the feed rate adjusting means for the grindstone 51, the feed amount detecting means, and the overload prevention means for the motor 15B are constructed as follows.

The feed rate adjusting means is connected to the grinding hydraulic cylinder 55.
An i fl/J all valve (not shown) is installed, and this flow control valve is provided to adjust the flow rate of the working fluid that drives the grinding hydraulic cylinder 55 to realize a low feed rate.

Further, the feed amount detection means includes a magnet provided on the piston of the grinding hydraulic cylinder 55, and a magnetic detector 59 mounted on the cylinder body.
is installed, and the magnetic detector 59 is installed to detect the piston movement position and detect the feed m of the grindstone 51.

Furthermore, the overload prevention means for the motor 15B is
When the load current is low, the hydraulic cylinder 55 for grinding is operated to send the grindstone 51, and the motor 15
The grinding hydraulic cylinder 55 is actuated to pull up the grinding wheel 51 when the load current of B becomes high, and when the load current becomes low, the grinding wheel 51 is pressed against the workpiece 11 again to perform grinding. .

Control of the grinding hydraulic cylinder 55 and the motor 15B is executed by the control device 2i21. By operating the welding surface grinding device 42 as described above, the surface of the steel material is smoothed, and portions such as oxide films, hardened layers, chains, etc. that pose obstacles to welding are removed.

As shown in FIGS. 3 and 4, the welding device ff17 includes a welding air cylinder 61 as a welding machine pressing device F17B, and a stud welding machine 17A fixed to the tip of the piston rod of this welding air cylinder 61. It is composed of: The welding air cylinder 61 is connected to the slide member 39
It is vertically installed on the upper plate 41G. Further, a rail 63 is formed to extend vertically on the rear surface of the standing plate 41A of the slide member 39, and the stud weld t117A is slidably locked to this rail 63. This stud welding machine 17A is supported by the standing plate 41A via a support spring 64. Therefore, the stud welder 17A is provided so that it can be pushed out in the vertical direction against the workpiece 11 against the biasing force of the support spring 64 by the operation of the welding air cylinder 61.

Further, the stud welding machine 17A is connected to the welding power supply device 19, and is provided at its tip so as to be able to grip the stud 65. This stud 65 has a bulged head. Stud welding 8117 from welding power supply 19
When the welding 7Il flow is applied to A, the stud welding machine 17
A uses a built-in electromagnet to pull up several studs 65, generate an arc between the stud 65 and the workpiece 11, melt the stud tip and the workpiece 11 with the heat of this arc, and in this state The stud 65 is pressed against the workpiece 11 and the stud is welded to the workpiece 11. The operations of the welding air cylinder 61 and the stud welding machine 17A are controlled by the control device 21 until II
be done.

The piston rods of the clamping hydraulic cylinder 31, the switching air cylinder 43, the grinding oil cylinder 55, and the welding air cylinder 61 are protected from dust by a bellows 67.

Furthermore, guide rollers 69 that serve as guides when the stud mounting device 1Φ is raised and lowered are placed ii2 on the back side of the device main body 3 and on the back side of the standing plate 41A of the slide member 39, respectively.

Next, the operation of the stud mounting device 1 will be explained.

First, the workpiece 11 is
Suspend the stud mounting device @1 from above. After the landing detector 35 (see Fig. 4) confirms that the stud mounting device 1 has landed on the workpiece 11, the stud mounting device 1 is stopped from descending, and the device body 3 is covered with the friction clamp 27. It is fixed to the workpiece 11. Next, the motor 15B (see FIG. 2) is activated to rotate the grindstone 51. In this state, the grinding hydraulic cylinder 55 is operated to lower the welding surface grinding device 42, and the grindstone 51 is pressed against the workpiece 11 to grind the welding surface of the workpiece. After finishing the grinding, the grindstone 51 is pulled up and the motor 15B is stopped.

After the grinding is completed, the switching air cylinder 43 (see FIG. 3) is operated to position the welding device 17 above the welding surface of the workpiece 11 ground by the welding surface grinding device 42. Thereafter, the welding air cylinder 61 (see FIG. 4) is operated to lower the stud welding machine 17A and press the stud 65 against the welding surface of the workpiece 11. In this state, a welding current is applied from the welding power supply 19 to weld the stud 65 to the welding surface of the workpiece 11. After welding of the stud 65 is completed, the welding air cylinder 61 is operated to pull up the stud weld m17A.

After pulling up stud welding 1117A, we type clamp 2
The clamp hydraulic cylinder 31 of No. 7 is operated to release the fixation by the clamp claws 33. Thereafter, the stud mounting device 1 is lifted up and moved by the crane 5 (see FIG. 1). The series of operations described above are controlled automatically or manually by the tI+112Il device 21.

According to the stud attachment device 1 of the above embodiment, the welding surface grinding device 42 and the welding device 1 are attached to the remotely movable device body 3.
7 are integrally provided, and these 42.1 are connected by the switching device 13.
7 is moved and controlled by the 1II11 till device 21, the starard can be welded by remote control. Therefore, even if the steel material is exposed to a high radiation dose, such as the light-spot steel material of a nuclear reactor pressure vessel, or in a poor environment, such as when the steel material is in a toxic gas atmosphere, workers can Studs can be welded without getting close to etc. As a result, worker safety during stud welding work can be improved.

Furthermore, since the welding surface processing device 15 is the welding surface grinding device 42, even when the hardness of the workpiece is high, the welding surface of the workpiece can be easily processed.

Further, the welding surface grinding device 42 rotates the grindstone 51 to the workpiece 11.
Since the welding surface can be formed by simply pressing the grinding wheel 51 against the workpiece 11, only one axis for moving the grindstone 51 in the vertical direction with respect to the workpiece 11 is required, and an axis for moving the grindstone 51 in a direction parallel to the workpiece 11 is unnecessary. Become. Therefore, the stud attachment device 1 can be made more compact, and the transportation performance of the stud 1 can be improved.

Further, a friction type clamp 27 was used as the fixing device 9, but this friction type clamp 27 is similar to the welding surface grinding device 42.
There is no need to increase the strength (and there is no need to provide a self-locking mechanism to prevent falling. Therefore,
A compact and inexpensive fixing device 9 can be provided.

In addition, in the stud mounting device of the above embodiment, the fixing device 9
Although the friction type clamp 27 has been described, a magnetic type fixing device may also be used.

Furthermore, although the stud mounting apparatus of the above embodiment uses a welding surface grinding device 42 as the welding surface processing device 15, a cutting device such as a milling cutter as shown in FIG. 1 may also be used.

Furthermore, in the stud mounting device of the above embodiment, the actuators, which are the clamping hydraulic cylinder 31, the switching air cylinder 43, the grinding hydraulic cylinder 55, and the welding air cylinder 61, are driven by hydraulic or pneumatic sources. , an electrical or similar drive source may be used as the drive source for the actuator.

Further, in the stud mounting device of the above embodiment, the switching device 13
Although the switching device has been described in terms of a device that moves linearly, it may also be a switching device that moves rotationally in a horizontal direction.

Furthermore, as shown in FIG.
13, and this multipurpose rotary head 73 may be equipped with a welding surface processing device 2t73 and a welding device 75. The multi-purpose rotary head 71 is provided rotatably in the vertical direction. This multi-purpose rotary head 71 may be provided with a general machining device RA 77 for machining the ground, such as a drill. In FIG. 5, the same parts as in the embodiment of FIGS. 1 to 4 are given the same reference numerals.

Furthermore, in the stud mounting device of the above embodiment, the case where a stud used as a lifting jig is attached to a workpiece as a suspended object has been described, but the stud as a foundation bolt is attached to a workpiece. You can.

〔Effect of the invention〕

As described above, according to the lifting method using studs according to the first invention, studs that are easy to install are attached to the suspended object and used as a lifting jig. This has the effect of safely and reliably carrying out the work of lifting objects to be suspended below.

Further, according to the stud mounting device according to the second invention, the device main body, which is movable by remote control, is provided with a fixing jig for fixing the device main body to the workpiece, and the device main body is further provided with a fixing jig for fixing the device main body to the workpiece. A welding surface processing device and a welding device δ are provided through the device, and the device main body, fixing device, switching device, welding surface processing device and welding device are controlled by the control device.
Since the welding device is provided to weld the stud to the workpiece, the stud can be welded by remote control. As a result, it is possible to safely perform stud welding to a workpiece under a poor environment.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing an embodiment of a stud mounting device according to the second invention, FIG. 2 is a front view showing details of the stud welding device shown in FIG. 1, and FIG. 3 is a stud welding device shown in FIG. FIG. 4 is a side view of the mounting device, FIG. 4 is a rear view of the stud mounting device of FIG. 2, and FIG. 5 is a schematic configuration diagram showing another embodiment of the stud mounting device according to the second invention. 1... Stud mounting device, 3... Device body, 9...
- Fixing device, 11... Workpiece, 13... Switching device, 15... Welding surface processing device, 15A... Tool, 17
... Welding equipment, 17A... Stud welding machine, 21.
...Control device, 27...Friction type clamp, 39...
Slide member, 42... Welding surface grinding device, 43...
Switching air cylinder, 51... grindstone, 65... stud. Representative Patent Attorney Noriyuki Chika Hirofumi Mimata Figure 3 Figure 5

Claims (1)

[Scope of Claims] 1. A method for hoisting using studs, characterized in that a stud is installed in an object to be suspended, and the stud is used as a lifting jig to lift the object to be suspended. 2. A device main body that is movable by remote control, a fixing device that is attached to the device body and fixes the device body to the workpiece, and a fixing device that is attached to the device body via a switching device and fixes the device body to the workpiece. a welding surface processing device that processes a welding surface of a workpiece; a welding device that is attached to the device main body via the switching device and welds a stud to the welding surface processed by the welding surface processing device; and the device main body and a control device for remotely operating the fixing device, the switching device, the welding surface processing device, and the welding device, and the switching device is configured to control the welding surface processing at a position facing an arbitrary surface of the workpiece. A stud mounting device characterized in that the device or welding device can be selectively set. 3. The stud mounting device according to claim 2, wherein the fixing device is a friction type clamp. 4. The stud mounting device according to claim 2 or 3, wherein the switching device is configured to move the welding surface processing device and the welding device linearly with respect to the main body of the device.