JP3482444B2 - Rotating machine for welding - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel material rotating machine suitable for use in welding of steel materials such as H-section steel.

[0002]

2. Description of the Related Art As described in Japanese Patent Publication No. 6-42998 or Japanese Utility Model Publication No. 3-24305,
In recent years, in the field of civil engineering and construction, large steel materials such as H-shaped and square tubes are often used. For example, in the case of square tube steel column materials for high-rise buildings, panel zones are welded in advance at a welding plant, and then Welded brackets are directly carried to the construction site for construction.

In the case of welding such a structure, if the welding work is performed downward, stable quality can be obtained, and it is difficult to perform the welding in the vertical direction or the upward direction.
Since the welding strength and soundness of the obtained product are often inferior, in the welding factory, downward welding is performed at a predetermined position.Therefore, the workpiece such as the steel material to be welded is rotated around the axis and is rotated at the desired angle. Rotating machines that can be supported are conventionally used.

Various types of such rotary machines have been considered, but all of the conventional rotary machines are structurally complicated and require a lot of maintenance, so that a preparatory work for mounting a steel material or the like on the machine base is required. It is complicated and there is a problem that the number of times the hoist crane is used increases, especially when the welded product is large.

In order to solve the above-mentioned problems in the conventional rotating machine, the inventor of the present invention provides a pair of left and right vertical frames at both ends of a base installed on the floor, and the inside and outside of the vertical frame are provided above and below the vertical frame. We invented a new welding rotary machine that is provided with swingable arms, and a drive means for moving the chain around these left and right arms and moving the chain in a predetermined direction, and has already applied for a patent. (JP-A-11-285895).

[0006]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
Since the work can be mounted on the rotating machine by a simple operation of lowering the work between the arms with the left and right arms opened, the work can be rotated by driving the chain. It can be made simple and robust, and is easy to use, but since the arm is rotatably attached to the top of the vertical frame, there is a limit to its opening and large workpieces can be mounted. There was a problem that it was inconvenient to do.

Since the arm is rotatably attached to the upper portion of the vertical frame fixed to the base,
Depending on the design, the height of the chain that supports the work may change considerably when the arms are rotated to open and close the arm interval. Therefore, an object of the present invention is to provide a rotating machine in which the arm interval can be made as wide as possible when a work is mounted, and the height of the chain does not change as much as possible when opening and closing.

[0008]

In order to solve the above problems, the present invention employs the following configurations. That is, the rotating machine for welding according to the present invention is provided with a pair of swingable arms on both left and right sides of a base frame installed on the floor, and a sprocket wheel provided on the pair of left and right arms is a chain. In a welding rotary machine provided with a driving means for moving the chain in a predetermined direction, the left and right arms are formed in a curved shape in which a middle portion bulges outward, and a lower end portion of the left and right arms is outwardly bent. To open state
The arm so that it is located inside the tip of the arm.
It is also possible to rotatably support the base frame with a beam shaft.
In addition, it is characterized by hanging a chain between the upper ends of the left and right arms.

In the rotating machine of the present invention, the chain for supporting the work is formed in the shape of an endless loop, and the chain is hung over a plurality of sprocket wheels provided along the arm in order to move circularly. Is preferable for simplifying the structure. Further, it is preferable for safety that the two chains are arranged in parallel because the work can be supported even if one chain is broken.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be specifically described below with reference to the accompanying drawings. 1 and 2
Represents an example of a rotating machine according to the present invention. The rotating machine 1 includes a base frame 2 installed on the floor, and arms 5, 5 are provided with shafts 6, 6 at both left and right ends of the base frame. Is rotatably attached and is formed in a generally U-shape as a whole.

Each of the pair of left and right arms 5 and 5 is formed in a curved shape in which the middle part bulges outward, and a sprocket wheel is provided at the upper end part and the middle part of each arm. Two of these sprocket wheels are symmetrically fixed to both ends of the cylindrical body, but they are treated as one sprocket wheel with the same symbols in the drawings. The mounting position of the sprocket wheel will be described below. The sprocket wheels 10 and 11 are attached to the shaft 10a at the middle portion and the upper end portion of the left arm 5 in FIG.
It is rotatably supported by the shaft 11a. The arm 5 in the illustrated example is made of a steel material having an H-shaped cross section, and at the mounting portion of the sprocket wheel 11 in the middle, the rib portion is cut out in a range slightly larger than the diameter of the sprocket wheel. . In addition, the sprocket wheels 12 and 13 are attached to the shaft 1 near the left and right ends of the base frame 2.
It is rotatably attached by 2a and 13a.

The base frame 2 is provided with an arc-shaped elongated hole 15 centered on the shaft 6, and a pin 16 which is a stopper protruding from the arm 5 is loosely fitted therein. Therefore, the rotation range of the arm 5 is restricted by the elongated hole 15 and the pin 16. As a stopper that regulates the rotation range of the arm 5,
The stopper is not limited to the illustrated example, and other suitable stoppers can be adopted.

A motor 20 for driving a chain is installed on the upper end of the right arm 5 in FIG. This motor 20 is provided with a speed reducer 21, and a small gear 22 is attached to its output shaft. This gear meshes with a large gear 24 integrally provided on a sprocket wheel 25 at the upper end of the arm. ing. A sprocket wheel 26 similar to the left arm is also rotatably supported by a shaft 26a in the middle of the right arm 5.

The sprocket wheels 10, 11, 1
2,13,25,26 has an endless looped chain 3
0 is passed over. As described above, the sprocket wheels are provided at both ends of the cylindrical body arranged between the flanges of the arm made of H-shaped steel, and the chains of the same size are respectively hung in parallel on the sprocket wheels on both sides. In the portion between the left and right arms 5, 5, that is, the work mounting portion, the chain 30 hangs down by a predetermined length. When the left and right arms 5 and 5 are respectively rotated outward to open the arms, the chain 30 is opened in a substantially V shape. The work is placed on this open chain.

As shown in FIG. 3, the arms 5 and 5 are stably held in a closed state in which their upper ends are in contact with each other. When the arms 5 and 5 are pushed in the opening direction in this state, the arms are moved. The shaft 6 rotates outward about the shaft 6 and is in an open state as shown in FIG. In this state, the shafts 6 and 6 are located inside the upper ends of the arms 5 and 5, so that the open state is stably maintained due to the weight of the arms themselves. Therefore, the operation of placing the work W on the chain 30 from the upper side is easy. When rotating the arms from this open state to the above closed state, the upper ends of the arms on both sides may collide with each other, which may cause noise or damage. It is preferable to stick it. When the work W is placed on the chain 30 in the open state, the weight of the work pulls the chain 30 downward, and as shown in FIG. 5, the arms 5 and 5 on both sides are drawn toward each other. Finally, the work is supported while being suspended from the chain. In this state, since the chain 30 surrounds most of the outer periphery of the work W, when the motor 20 is operated, the chain 30 runs in the predetermined direction along the row of sprocket wheels to rotate the work. . Since this rotation is performed slowly by the action of the speed reducer, it is safe and positioning (angle determination) is easy. When the work is rotated at a desired angle, the motor 20 may be stopped and welding may be performed.

The rotating machines 1 are generally installed and used in rows as shown in FIG. The interval between the rotating machines may be set appropriately according to the length of the work. In this state, the arms 5 and 5 of each rotating machine are opened (outwardly rotated), and the work is placed on the chain of each rotating machine from above by using a crane or the like. Then, since the chain 30 is pulled downward by the weight of the work, the arms 5 and 5 of the respective rotating machines rotate inward, and the work is in a state of being half-surrounded.

When the motor 20 of the rotating machine 1 is rotated in this state, the chain 30 travels in the direction of the arrow in FIG. 5, for example, depending on the direction of rotation, so that the work W supported by the chain moves in the direction of the arrow. It rotates. It can also be rotated in the opposite direction. When the desired rotation angle is reached,
Welding may be performed by stopping the motor. When there are a plurality of welding points, the rotation and the welding operation may be sequentially repeated. When all welding is completed, the work is lifted again using a crane or the like. At this time, the arms 5 and 5 of each rotating machine may be opened by hand, but since the work that is lifted by a crane or the like contacts the arm from below and pushes up the tip of the arm to open it, there is no problem in opening the work. You can take it out.

When a plurality of rotating machines 1 are arranged in a row and used, it is not necessary to rotate all the motors of all the rotating machines, and only one of the plurality of rotating machines is forcibly rotated and the other rotating machines are rotated. May be accompanied. In this case, the rotating machine that does not rotate forcibly will interfere with the rotation of the motor.
The motor is preferably removed or the transmission between the motor and the sprocket wheel is cut off.

In the above embodiment, the chain 30 is formed as a closed loop body and the sprockets arranged in a row are sequentially circulated. However, the sprocket at the upper end portion can be held by a chain having a preliminary length. It may be formed as a possible sprocket, each provided with a drive means. In this case, no other sprocket wheel is needed.

[0020]

As described above, according to the welding rotary machine of the present invention, the lower ends of the pair of left and right arms having the outwardly bulging curved shape are rotatably supported by the base frame, and both arms are rotatably supported. Since the work is supported by the chain that is hung between the upper ends of the and the work is rotated by moving the chain, it is possible to sufficiently open the arms on both sides when attaching and detaching the work. It is structurally simple and practically convenient. This arm is the middle part
Is formed in a curved shape that bulges outward, and its lower end
The arm in the open state with the arm pivoting outward.
The shaft provided so that it is located inside the tip of the
Since it is rotatably supported by the base frame,
A stable open state is maintained due to the weight of the body,
Mounting the work from above is extremely easy. Moreover, since the height difference between the arms can be reduced between the state in which the arms are opened and the state in which the arms are closed, this is also convenient in this respect. In the above description, the case where the work for welding is used for rotation and support is described, but it goes without saying that it can be used for other purposes as an object rotation supporting device that requires rotation during work.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a side view thereof.

FIG. 3 is a front view showing a closed state of an arm.

FIG. 4 is a front view showing an open state of the arm.

FIG. 5 is a front view showing a work supporting state.

FIG. 6 is an explanatory diagram of usage.

[Explanation of symbols] 1 rotating machine 2 base frames 5 arms 10,11 sprocket wheels 12, 13 sprocket wheels 20 motors (driving means) 30 chains W work

Claims (2)

(57) [Claims] 1. A pair of swingable arms are provided on both left and right sides of a base frame installed on the floor, and a chain is stretched over sprocket wheels provided on the pair of left and right arms, and the chain is moved in a predetermined direction. in welding rotating machine provided with a driving means for moving the, the left and right arms the intermediate part is formed in a curved shape bulging to the outside, the lower end,
The tip of the arm in the open state in which the arm is rotated outward
By the shaft provided so as to be located inside the end portion,
A welding rotary machine characterized in that the chain is rotatably supported by a base frame and a chain is stretched between the upper ends of the left and right arms. 2. The sprocket wheel is a flan of the arm.
It is provided at both ends of the cylindrical body placed between the
Chains of the same size are attached to the side sprocket wheels.
The welding rotary machine according to claim 1, which is hung in parallel .