JPH0763868B2 - Rotation support device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] When a long body is generally rotated in a state in which its axis is oriented horizontally and its outer peripheral portion is received by a rotary support, it is rotated about the axis. For example, when the outer diameter is slightly different in the longitudinal direction or the shaft center is slightly tilted, a step phenomenon of trying to swing in the shaft center direction is likely to occur. Therefore, the present invention is
In a state in which the axis of the elongated body is oriented substantially horizontally, a rotary support that rotatably supports the elongated body around the axis,
The present invention relates to a rotation supporting device provided with a stopper that restricts movement of the elongated body in one of the axial directions with rotation.

[Conventional technology]

Conventionally, in a rotary support device for a long body, a rotary support for rotatably supporting the long body is arranged at a plurality of positions in the longitudinal direction of the long body, and is accompanied by rotation of the long body. Only a stopper for abutting the end of the elongated body is provided in order to restrict the movement in one of the axial directions.

[Problems to be Solved by the Invention]

However, when the movement of the long body in one axial direction due to the rotation is applied to the stopper and regulated, the rotation support does not move to the rotation support body as a pressure contact force acts from the long body to the stopper. The reaction force from the stopper acts via the elongated body. In this case, a large frictional force acts along the axial direction between the elongated body and the rotary support. As a result, there has been a problem in that the surface of the long-body supporting portion of the rotary support rapidly wears to shorten the service life, and the rotary support must be replaced at an early stage, which is uneconomical.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned drawbacks and to provide a rotation supporting device which can economically prevent movement of an elongated body in one axial direction due to rotation.

[Means for Solving the Problems]

In order to achieve the above object, the present invention divides a rotary support near a stopper into two parts in a height direction into a lower support part and an upper support part, and the upper support part is axially attached to the lower support part. The upper support part is slidably mounted in the axial direction, and the sliding surface between the both support parts is slid in the axial direction of the upper support part by the reaction force from the stopper. Is formed on the cam surface that rises reversibly.

[Work]

That is, when the movement of the elongated body in the axial direction is brought into contact with the stopper to be blocked, the reaction force from the stopper acts on the upper support portion via the elongated body. Since the upper support portion is slidably mounted on the lower support portion in the axial direction, the upper support portion is elongated relative to the lower support portion in response to the reaction force. It begins to slide in the direction opposite to the moving direction.

Further, the sliding surface between the upper support portion and the lower support portion,
With the sliding due to the reaction force from the stopper, the upper support portion is formed on the cam surface that reversibly rises. Therefore, the upper support portion resists the weight of the elongated body, As it slides, it rises, and the stopper side portion of the elongated body tries to rise higher than the other side portion. When the length is about to tilt, a component force against its own weight is generated, a force is generated in the direction away from the stopper along the axial direction, and a moving force in the direction approaching the stopper generated as the long body rotates is , The amount of force component to the body weight is reduced. As a result, the reaction force received by the upper support portion from the stopper via the elongated body becomes small, and the ascending position of the upper support portion by the cam surface is balanced when the reaction force received from the stopper becomes close to zero. Determined.

As described above, in the rotary support device according to the present invention, since the reaction force acting on the rotary support is always reduced, the frictional force acting between the elongated body and the rotary support is Get smaller.

〔The invention's effect〕

Therefore, abrasion of the surface of the long-body supporting portion of the rotary support is suppressed, the life of the surface of the long-body supporting portion is extended, and it becomes unnecessary to frequently repair the surface. In addition, since the movement of the long body itself is used to prevent the movement without using new power, energy can be saved, and further, the power lost due to the friction between the long body and the rotary support is also reduced. This has reduced the running cost as a whole.

As a result, it is possible to provide a rotation supporting device that can economically prevent the movement of the long body in one of the axial directions due to the rotation.

〔Example〕

Fig. 1 shows a pile for civil engineering on a cylinder as a long body (1).
A processing device for automatically welding the entire circumference by butt welding with an arc welder (2) is shown. The arc welding machine (2) is fixed to the ground, and the rotary support device (3) welds the entire circumference while rotating the pile (1) as the elongated body. A rotary support (4) for supporting the pile (1) with the axis (P) oriented in the lateral direction so as to drive and rotate the pile (1) in the direction of the axis (P) of the pile (1) as the pile (1) rotates. It comprises a stopper (5) for restricting the movement to one side by contact with the pile (1), and the rotary support (4) is provided side by side at two positions in the axial (P) direction of the pile (1). , Pile (1) on stopper (5)
The one end face of is touched. A roller (5D) for smoothly rotating the pile (1) is provided on the contact surface of the stopper (5) with respect to the pile (1).

As shown in FIGS. 2 and 4. The rotating support (4)
Has two rotating rollers (7) on top of the support body (6)
Is equipped with. This roller (7) corresponds to the pile (1)
Two of them are arranged in the circumferential direction. And the motor (M)
Then, one roller (7) is driven and rotated to rotate the pile (1) on the roller (7) around its axis (P). A wheel (9) is provided below the support body (6), and the wheel (9) is mounted on a rail (10) provided along the axis (P) direction of the pile (1). Therefore, the support interval of the pile (1) by the both rotary supports (4), (4) can be freely changed and operated. Therefore, the support interval can be accurately adjusted in a short time according to the length of the pile (1).

In other words, the wheel (9) is vertically movable with respect to the support body (6), and the support book pair (6) is provided between the wheel (9) and the support body (6). When a pile (1) is not placed on the roller (7) by providing a spring (11) for urging the roller upward, as shown in FIG.
When the support body (6) is floated upward from the drawing by the spring (11) so that it can be freely moved on the rail (10) and the pile (1) is placed on the roller (7), the second As shown in the figure, the weight of the support body (6) lowers the ground to make it immovable on the rail (10).

As shown in FIGS. 2 and 4, of the two rotary supports (4), (4), the rotary support (4) near the stopper (5) is connected to the lower support (4A) and the upper part. Support part (4B)
It is divided into two in the high direction. Further, a pair of left and right guide grooves (12) are formed in the lower support portion (4A) substantially along the axis (P) direction of the pile (1), and the lower portion of the upper support portion (4B) is formed. Is fitted into the pair of guide grooves (12), and the upper support portion (4B) is configured to be swingable along the guide grooves (12). Side walls (13) for restricting the movement range of the upper support portion (4B) are provided at both ends of the guide groove (12) in the front-rear direction. The upper support (4B)
The swing surface (14) between the lower support portion (4A) and the lower support portion (4A) is the swing surface (14) between the upper support portion (4A) and the axial center (P) of the upper support portion (4B). The upper support portion (4B) is formed on a cam surface that can reversibly rise along with the swing along the direction. That is, the gradient in the axial center (P) direction of the pile (1)
It is formed on an inclined surface of 10/400, and becomes higher as it gets farther from the stopper (5).

In the above structure, when a force is applied to the upper support portion (4B) in a direction away from the stopper (5) side in the axial center (P) direction, the upper support portion (4B) causes the swing surface (14) to move. It rises while swinging, and when the force becomes smaller, it falls while swinging due to the weight of the pile (1).

[Other Embodiments] The slope of the swing surface (14) is not limited to 10/400. Further, the swing surface (14) may be formed into a curved surface.

The rotary support (4) is arranged in the longitudinal direction of the pile (1).
One or more may be provided, and among these three or more rotary supports (4), an upper support part (4B) and a lower support part (4).
The rotary support (4) divided into two parts (A) and (2) may not be located at the position closest to the stopper (5).

The rotating device according to the present invention is not limited to the case where the long body is automatically welded all around, but can be applied to the case where the long body is cut or inspected while being rotated.

Instead of the pile (1), a cylindrical supporting column for building structure may be used, and in the end, a columnar elongated body may be used.

A crawler may be used instead of the roller (7).

The shape of the roller (7) may be a Japanese drum shape having a large diameter inside in the longitudinal direction, other than the cylindrical shape.

It should be noted that although numbers are given in the claims for convenience of comparison with the drawings, the present invention is not limited to the structures of the accompanying drawings by the entry.

[Brief description of drawings]

The drawings show an embodiment according to the present invention. Fig. 1 is a front view showing a welding process state, Fig. 2 is a side view of the same, Fig. 3 is a side view of a waist, and Fig. 4 is a perspective view of a rotary support. Is. (1) …… Long body, (4) …… Rotary support, (5) …… Stopper, (4A) …… Lower support, (4B) …… Upper support, (14) …… Sliding surface , (P) …… Axis center

Claims (1)

[Claims] 1. A rotary support for rotatably supporting the elongated body (1) around the axis (P) with the axial center (P) of the elongated body (1) oriented substantially horizontally. Stoppers (4) are arranged at a plurality of positions in the longitudinal direction of the elongated body (1) and restrict movement of the elongated body (1) in one direction of the axis (P) in accordance with rotation of the elongated body (1). 5) is provided, wherein the rotary support (4) near the stopper (5) is provided with a lower support part (4A) and an upper support part (4B).
Is divided into two parts in the height direction, and the upper support part (4B) is slidably mounted on the lower support part (4A) in the axial core (P) direction. The sliding surface (14) between the upper part (4B) and the upper part (4B) along with the sliding of the upper support part (4B) in the axial center (P) direction by the reaction force from the stopper (5). A rotation support device in which a support portion (4B) is formed on a cam surface that rises reversibly.