JPH04358557A - Apparatus for coating pipe - Google Patents

Abstract

PURPOSE:To eliminate the generation of painting irregularity by making at least three sets of support rollers each composed of a pair of rollers arranged on a base stand so as to be divided in the axial direction of a pipe to be coated selectively replaceable between the contact position with the pipe and a position spaced apart from the pipe. CONSTITUTION:A pipe M to be coated is transported to a base stand 1 by a crane to be supported by support rollers 4A, 4B, 4N raised to a contact position and the support rollers are rotationally driven by a motor. As a result, the pipe M is rotated in the peripheral direction thereof and, in this state, paint (a) is supplied to the outer peripheral surface of the pipe M from a paint feeder 21 to be applied thereto. At this time, when the paint feeder 21 is ready to reach the position corresponding to the support rollers 4A, only the support rollers 4A are allowed to be spaced apart from the pipe M. When the piston rod 12 of a cylinder device 9A corresponding to the support rollers 4A is attracted to revolve a support arm 6, the support rollers 4A are displaced to be set to a speced-apart position.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe coating apparatus for coating the outer peripheral surface of a pipe to be coated while rotating the pipe in the circumferential direction.

0002

2. Description of the Related Art In a conventional coating apparatus of this type, as shown in FIG.
The pipe M to be coated is supported by these support rollers 72A and 72B, and is rotated in the circumferential direction to move the paint supply body 73 in the axial direction of the pipe M so as to cover the outer circumferential surface of the pipe M. It was designed to be painted.

0003

[Problem to be Solved by the Invention] In the conventional device as described above, the support rollers 72A and 72B that support the pipe M are always in rolling contact with the pipe M in a fixed state. This will cause uneven coating on the outer peripheral surface of the pipe M. For this reason, it is necessary to correct the uneven coating after shifting the position of the pipe M, which is not only inefficient but also poses a risk of damaging the pipe M.

The present invention has been made to solve the above-mentioned problems, and provides a method for painting pipes that can facilitate painting work without damaging the pipe to be painted or causing uneven coating. The purpose is to provide equipment.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides at least three sets of support rollers, each pair of which supports a pipe to be painted, separated in the axial direction of the pipe. The apparatus is disposed on a table, and the base is provided with roller position changing means for selectively displacing the support rollers of each set between a pipe contact position and a separation position.

[0006]

[Operation] According to the coating apparatus having the above configuration, when the paint supply body is moved in the axial direction of the pipe to be coated to coat the outer peripheral surface of the pipe, when the paint supply body comes to a position corresponding to the support roller. By displacing only the support roller to the separated position, paint unevenness can be avoided, and therefore the painting work can be carried out efficiently without the risk of damaging the pipe.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 and 2 are a side sectional view and a plan view, respectively, showing a pipe coating apparatus according to an embodiment of the present invention.

In FIGS. 1 and 2, reference numeral 1 denotes a base, which consists of a square frame 2 and legs 3.
Above are at least three sets of support rollers 4 (4A, 4B,...4N), each pair supporting a pipe M to be coated.
) are arranged at equal intervals in the axial direction of the pipe M. Reference numeral 5 denotes a shaft support member fixed on the base 1 in correspondence with each of the support rollers 4, and the base end side of the support arm 6 is attached to the shaft support member 5 along a vertical plane via a shaft 7. The bearings 8 of each of the support rollers 4 are connected to the distal end side of the support arm 6 .

9 (9A, 9B,...9N) is a cylinder device provided on the base 1 in correspondence with the support roller 4, and as shown in FIG. 3, the base end thereof is fixed to the base 1. The piston rod 12 is rotatably supported on a bracket 10 via a shaft 11, and the distal end side of the piston rod 12 is pivoted via a shaft 14 to a drive piece 13 integrated with the support arm 6. Supported and connected. This cylinder device 9, together with the support arm 6, etc., connects the support roller 4 to the pipe M.
The contact position (solid line position in Fig. 3) and separation position (Fig. 3
This constitutes a roller repositioning means 15 that selectively displaces the roller between the two positions (the chain line position).

One rotating shaft 1 of each set of support rollers 4
A sprocket 17 is fixed to 6. A chain 20 is suspended between this sprocket 17 and a sprocket 19 attached to a rotating shaft 18a of a rotational drive device such as a motor 18, and the rotational force of the motor 18 is applied to the support roller 4. It is meant to be transmitted. Reference numeral 21 denotes a paint supply body that is movable along the axial direction of the pipe M and applies paint a to the outer peripheral surface of the pipe M.

In the coating apparatus having the above configuration, first, as shown in FIG. 4, the pipe M to be coated is transported onto the base 1 by a crane or the like (not shown), and is placed on the support roller 4 which has been raised to the rolling contact position. After being supported, when the support roller 4 is rotationally driven by the motor 18, the pipe M is rotated in the circumferential direction. In this state, the outer circumferential surface of the pipe M is painted by supplying the paint a from the paint supply body 21 to the outer circumferential surface of the pipe M.

At this time, when the paint supply body 21 moves in the axial direction of the pipe M and is about to reach the position corresponding to the support roller 4A, only the support roller 4A is separated from the pipe M as shown in FIG. . That is, this support roller 4
When the piston rod 12 of the cylinder device 9A corresponding to A is retracted and the support arm 6 is rotated via the drive piece 13, the support roller 4A is displaced and set to the separated position shown by the chain line in FIG. Ru. Therefore, the outer circumferential surface of the pipe M can be painted without any uneven coating occurring at the support roller 4A portion. The above coating supply body 21
When it passes the position corresponding to the support roller 4A, the piston rod 12 of the cylinder device 9A is pushed out, and the support roller 4A is set to the rolling contact position shown by the solid line in FIG.

Even when the paint supply body 21 moves to a position corresponding to another support roller 4B as shown in FIG. 6, the support roller 4B is separated from the pipe M by the cylinder device 9B in the same manner as described above. , coating can be performed without causing uneven coating. In other words, the pipe M
There is no need to change the position of the pipe M, the efficiency of the painting process can be improved, and there is no risk of damaging the pipe M.

In the above embodiment, the roller position switching means 15 is explained as one in which the support roller 4 is rotatably displaced by the cylinder device 9, but any means capable of displacing the support roller 4 between the pipe contact position and the separation position may be used. For example, any structure may be used.

[0015]

As described above, according to the present invention, at least three sets of support rollers, one pair of which are arranged on the base separately in the axial direction of the pipe to be coated, are arranged at the rolling contact position of the pipe. Since the support roller is configured to be selectively movable to a separated position, painting can be performed with the support roller at a location corresponding to the paint supply body separated from the pipe. Therefore, the entire outer peripheral surface of the pipe can be efficiently painted without causing uneven coating or damaging the pipe.

[Brief explanation of drawings]

FIG. 1 is a side sectional view showing a pipe coating apparatus according to an embodiment of the present invention.

FIG. 2 is a plan view showing a pipe coating apparatus according to an embodiment of the present invention.

FIG. 3 is a side view showing roller position changing means.

FIG. 4 is an explanatory diagram of a state in which the pipe is supported by support rollers.

FIG. 5 is an explanatory diagram of the operation during pipe painting.

FIG. 6 is an explanatory diagram of the operation during pipe painting.

FIG. 7 is a schematic configuration diagram of a conventional pipe coating device.

[Explanation of symbols]

1 Base 4A, 4B, 4N Support roller 15 Roller position changing means 21 Paint supply body M Pipe for painting

Claims (1)

[Claims] 1. A pipe coating device that paints the outer circumferential surface of a pipe while moving a paint supply body along the axial direction of a pipe to be painted that is rotatably driven in the circumferential direction, wherein a pair of pipes that support the pipe are provided. At least three sets of support rollers, each set being one set, are arranged on the base separately in the axial direction, and each set of support rollers is selectively placed on the base at a pipe contact position and a separation position. A pipe coating device characterized by being provided with roller position changing means for displacing the rollers.