JPH0763870B2 - Rotation support device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] Generally, when an elongated body has its axis centered laterally and its outer peripheral portion is received by a rotary support and 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 move in the shaft center direction is likely to occur. In view of the above, the present invention provides a rotary support that rotatably supports the elongated body around the first axis with the first axis of the elongated body oriented substantially horizontally. It is arranged at multiple points in the longitudinal direction of
The present invention relates to a rotation support device provided with a stopper that restricts movement of the elongated body in one direction of the first axis along with rotation of the elongated body.

[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. In order to restrict the movement of the elongated body in one direction, only a stopper that abuts the end of the elongated body is provided.

[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 that the surface of the long-body supporting portion of the rotary support is rapidly worn and the life is shortened, and the rotary support must be replaced early, 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-mentioned object, the present invention comprises a rotary support near a stopper, and is rotatably provided around a second axial center in a vertical direction that is perpendicular or substantially perpendicular to the first axial center, and A first elongated body support portion and a second elongated body support portion are provided on both sides of the second axis, and the elongated body is rotated based on the rotation of the rotary support body around the second axis. The distance between both supporting points of each of the first and second elongated body supporting portions with respect to
Further, the first and second elongated body supporting portions are formed so that the both supporting points are vertically displaced, and the reaction force received from the stopper of the elongated body causes the first and second elongated body supporting portions to move around the second axis. It is characterized in that the second shaft center is laterally displaced from the first shaft center so that the rotary support body rotates.

[Work]

That is, when the movement of the elongated body in the first axial direction is blocked by contacting the stopper, the reaction force from the stopper causes the reaction force from the stopper to move to the first position of the rotation support body near the stopper via the elongated body. 1
It acts on the elongated body supporting portion and the second elongated body supporting portion. Since both the first and second elongated body supporting portions are provided so as to sandwich the second axial center in the vertical direction, which is perpendicular or substantially perpendicular to the first axial center, the moment due to the reaction force is the second axial direction. Work in opposite directions around your heart. Since the second axis is laterally offset with respect to the first axis, the distance from the second axis to the support point of the first elongated body supporting portion and the second axis Unlike the distance from the center to the support point of the second elongated body supporting portion, there is a difference in both moments around the second axis. Therefore, since the rotary support is rotatably provided around the second axis, it rotates about the second axis due to the difference between the two moments, and the first axis is rotated. The distance between the apparent support points is changed in the cardiac direction. Along with this, both support points that contact-support the elongated body are displaced upward, and the stopper-side end portion of the elongated body is raised. The amount of rise of the stopper has a value corresponding to the reaction force, and the larger the reaction force is, the larger the amount of rise is. When the end of the elongated body rises, as a component force against its own weight, a force is generated in the direction away from the stopper along the axial direction, and a moving force in the direction of approaching the stopper generated as the elongated body rotates. Is reduced by the amount of component force with respect to its own weight. As a result, the reaction force received by the rotary support from the stopper via the elongated body is also reduced, and the rotation angle of the rotary support is balanced and determined when the reaction force received from the stopper is minimized.

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, the wear 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 lengthened, and it becomes unnecessary to frequently repair the surface. Also, without using new power, by using the moving force of the long body itself to prevent its movement, energy can be saved,
Furthermore, the power lost due to the friction between the long body and the rotary support is reduced, and the running cost as a whole can be reduced. As a result, it is possible to provide a rotation supporting device that can economically prevent the movement of the elongated body in one of the axial directions due to the rotation.

〔Example〕

Fig. 3 shows a cylindrical pile for civil engineering 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 welder (2) is fixed to the ground and the rotary support device (3) supports the pile (1).
Weld the entire circumference while rotating.

The rotary support device (3) supports a rotary support (4) that supports the pile (1) with its axis (P) oriented in the lateral direction so as to drive and rotate the pile (1), and a pile (1) accompanying the rotation of the pile (1). 1)
Of the pile (1) in one direction of the first axis (P)
It consists of a stopper (5) that regulates by contact with
The rotary supports (4) are arranged side by side at two positions in the direction of the first axis (P) of the pile (1), and one end face of the pile (1) is brought into contact with the stopper (5). A roller (5D) for smoothly rotating the pile (1) is provided on the contact surface of the device (5) with respect to the pile (1).

As shown in FIG. 4, the rotation support body (4) includes a first rotation roller (7A) as a first elongated body support portion and a second elongated body support on the upper part of the support body (6). And a second rotating roller (7B) as a part. This rotating roller (7
Two of A) and (7B) are arranged laterally, and one of the rollers (7A) is rotationally driven by a motor (M).

A wheel (9) is attached to a lower portion of the support body (6), and the wheel (9) is mounted on a rail (10) provided along the first axis (P) direction of the pile (1). Therefore, the supporting interval of the pile (1) by the two rotary supports (4) and (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).

That is, the wheel (9) is vertically movable with respect to the support body (6), and the support body (6) is located above the wheel (9) and the support body (6). When the pile (1) is not placed on both the rotating rollers (7A) and (7B) by providing the spring (11) for urging the spring (11), as shown in FIG. The support body (6) is floated above the ground so that it can move freely on the rail (10), and the pile (1) is placed on both rotating rollers (7A) and (7B).
When is mounted, as shown in FIG. 4, the weight of the supporting book (6) lowers and grounds it, making it immovable on the rail (10).

As shown in FIGS. 3 and 4, of the two rotary supports (4), (4), the rotary support (4) near the stopper (5) is referred to as the lower support (4A). Upper support (4
B) and the lower part (4
An upper support (4B) is rotatably connected to a boss (12) provided vertically in (A) via a bearing (13). The second shaft center (Q), which is the shaft center of the boss (12), is perpendicular to the first shaft center (P).
A) and (7B) are distributed to the left and right with the second axis (Q) in between. The second axis (Q) is laterally offset with respect to the first axis (P). Therefore, the distance from the support point (R1) of the first rotating roller (7A) to the pile (1) to the second axis (Q) and the support point (R2) of the second rotating roller (7B) to It is different from the distance to the 2-axis center (Q).

Both the rotating rollers (7A) and (7B) are connected to the upper supporting portion (4B) through the supporting frame (14), and both supporting frames (1
4) is the shaft (1) provided along the vertical direction on the upper support (4B).
It is rotatably connected to 5) via a bearing (16). Therefore, the upper support portion (4B) has the second axial center (Q).
Even if the rotary roller (7) is rotated around, the rotary roller (7) does not rotate integrally with the upper support portion (4B), and keeps the posture in which the axis is aligned with the axis (P) of the pile (1). , Rotating roller (7
The rotation of A) and (7B) is transmitted smoothly to the pile (1).

[Another embodiment]

The rotary support (4) is arranged in the longitudinal direction of the pile (1).
More than one may be provided, and these rotary supports (4)
Of these, the rotary support body (4) divided into the upper support portion (4B) and the lower support portion (4A) may not be located closest to the stopper (5).

The rotating rollers (7A) and (7B) may be provided in three or more pieces, and may be formed by crawlers or the like in addition to the rollers, which are collectively referred to as a long body supporting portion.

The rotating device according to the present invention can be applied not only to the case of automatically welding a long body over the entire circumference, but also to the case of cutting or inspecting while rotating the long body.

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.

It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the structures of the drawings by these symbols.

[Brief description of drawings]

The drawings show an embodiment according to the present invention, FIG. 1 is a plan view showing a welding state, FIG. 2 is a plan view showing a state in which a rotary support is rotated, and FIG. 3 is a front view showing a welding state. 4 is a side view of the same, and FIG. 5 is a side view of a main part. (1) …… Long body, (4) …… Rotary support, (5) ……
Stopper, (7A) ... first elongated body supporting part, (7B) ... second elongated body supporting part, (P) ... first axis, (Q) ... second
Shaft center, (R1) …… Support point of the first elongated body support, (R2)…
... Support point of the second elongated body supporting portion.

Claims (1)

[Claims] 1. The elongated body (1) is rotatable about the first axis (P) with the first axis (P) of the elongated body (1) oriented substantially horizontally. The rotating support (4) that supports
Stoppers (5) are provided 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 first axis (P) in accordance with rotation of the elongated body (1). A rotary support device, wherein the rotary support (4) near the stopper (5) comprises a second vertical direction perpendicular to or substantially perpendicular to the first axis (P). A first elongated body supporting portion (7A) and a second elongated body supporting portion (7B) are provided rotatably around the axis (Q) and on both sides sandwiching the second axis (Q). And the two first and second elongated body supporting portions (7A) with respect to the elongated body (1) based on the rotation of the rotary support body (4) around the second axis (Q).
(7B) The distance between the two support points (R1) and (R2) is changed, and the first and second long lengths are arranged so that the support points (R1) and (R2) are vertically displaced. Body support (7A), (7
B) is formed, and the stopper (5) of the elongated body (1) is formed.
The second shaft center (Q) is moved with respect to the first shaft center (P) so that the rotary support (4) is rotated around the second shaft center (Q) by a reaction force received from the second shaft center (Q). The rotation support device is laterally offset.