JP3282752B2 - Tube end face coating method and apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for coating an end face of a circular or elliptical tube, and more particularly to a method of coating with a high accuracy in a coating range and capable of coping with a change of a tube as an object. Further, the present invention relates to a method and an apparatus for coating a pipe end surface having excellent long-run performance.

[0002]

2. Description of the Related Art Conventionally, a method of applying a coating material such as an adhesive or a paint to an end surface of a tube having an annular or oval annular shape has been performed by applying a coating material with a brush or the like by an operator's hand. This operation is a persistent operation performed with care so as not to allow the applied material to protrude from the end face of the tube, and is an operation that can be performed only by skilled workers.

[0003] It is necessary to pay attention to this because, when the coated material protrudes from the end face of the tube, the coated material itself is peeled or transferred from the portion protruded by a subsequent impact or the like, thereby contaminating other tubes. It is.

[0004]

The reason why the coating operation could not be automated is that the coating surface (the end surface of the tube itself) in the coating process was not fixed. That is, there is a problem that the thickness differs for each pipe, or the end face thereof is eccentric, or the end face of the pipe is inclined if the pipe is bent during the coating operation.

[0005] Further, the coating material to be applied must be uniformly and continuously supplied in an elongated shape in an annular shape. However, there was a problem that such a supply could not be performed by applying with a brush, a brush or a roller.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional disadvantages, and it is intended to improve the accuracy of coating only on the end face of a circular or elliptical tube, and to improve the quality of the tube as an object to be coated. An object of the present invention is to provide a method and an apparatus for coating a pipe end face which can cope with a change and which is excellent in long-run performance.

[0007]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above, and has been made in consideration of the above. After adjusting the position of the end of the tube while stably holding the tube near both ends, the tube is rotated around the periphery. A method for applying a coating material only to the end face of the tube while rotating the coating material in a direction, and adjusting the coating material to a substantially uniform width and thickness.

Further, the present invention provides a tube holder for stably holding a plurality of tubes while moving the tubes in a direction perpendicular to the longitudinal direction thereof, and a tube holder or a tube holder disposed near the tube holder. An adjusting device that adjusts the position of the end surface by pressing the end surface of the tube, and two or more pairs of adjusting devices that are disposed near the tube moving direction side of the adjusting device and rotate in the circumferential direction while stably holding the tube. A rotating device having rollers, a supply pipe arranged near the end face when held by the rotating apparatus, and a supply pipe for supplying the coating material only to the end face, and a supply pipe arranged near the supply port of the supply pipe; A coating device having a correction tool for spreading a coating material to a substantially uniform width and thickness on the surface of the end face; and the supply port connected to a contact portion connected to the coating device and abutting on the outer periphery of the pipe. And a follower for causing the correction tool to follow the end face. It is also the equipment.

Here, in the present invention, as means for stably holding the pipes near both ends thereof, when a plurality of pipes are arranged in a raft, the pipes extend in a direction perpendicular to the longitudinal direction of the pipes. There is a tube holder for holding at least both ends in the vicinity of the lower part from below, such as a tube holder in which the upper part of the table is inclined downward toward the pipe moving direction to move the pipe by its own weight or in the pipe moving direction. There is one provided with a belt conveyor that moves toward.

Means for adjusting the position of the end face of the pipe include means for adjusting the position of the end face by sliding the pipe in the longitudinal direction by a pressing device capable of pressing the end face of the pipe only from the outside of both ends to a desired position. There is a means for adjusting the position of the end face by sliding the tube in the longitudinal direction in response to data from a sensor for recognizing the position.

As the means for rotating the pipe in the circumferential direction, any means for rotating the pipe in the circumferential direction while keeping the end face of the pipe in contact can be suitably used. In some cases, a roller is brought into contact with the peripheral surface of a tube, and one or both of the rollers are rotated to rotate the tube in the circumferential direction.

When a roller serving as a pipe rotating means is also used as a stable support member for coating the pipe end surface, the pipe is stably held by two or more pairs of rollers arranged at a predetermined interval. It is preferable to rotate while rotating. In addition,
Of course, any number of rollers may be set as long as the entire tube can be rotated uniformly. A driven roller or a ball can be used other than the driving roller, but a roller is preferable to a spherical roller in order to stabilize the position of the tube.

The means for applying the coating material having a substantially uniform width and thickness only to the end face of the pipe can be appropriately selected as long as it is a means which is supplied in a long, narrow, uniform and continuous manner with high precision. There is a means for continuously supplying the coating material in an amount calculated in consideration of the viscosity to the end face of the tube for one round, and then spreading the coating material substantially uniformly within a range not protruding from the end face. Further, as an apparatus for realizing this means, a supply pipe arranged near the end face of the pipe when it is stably held and supplying the coated material to this end face, and a supply pipe arranged near the supply port of the supply pipe, There is a coating apparatus including a correction tool for spreading a coating material to a substantially uniform width and thickness on the end surface. Here, the applicator can be appropriately selected as long as the applicator can spread the applied material with a uniform width, and examples thereof include a brush, a brush, and a roller.

It is necessary that the supply port of the supply pipe and the applicator follow the end face of the pipe. As the following means, there are a means for confirming and following the end face of the tube with a position confirmation sensor, and a means for following the position of the supply port and the applicator in conjunction with a contact member abutted on the outer periphery of the tube.

The method of coating the end face of a pipe according to the present invention is performed not only in a pipe manufacturing line or a coating line for coating a pipe with a coating material, but also after manufacturing or after coating.
Of course, a single line may be provided and applied.
In addition, the coating material can be appropriately selected as desired, and examples thereof include an adhesive, a paint, and a synthetic resin in which a desired additive is blended.

[0016]

According to the present invention, the position of the end of the tube is adjusted while the tube is stably held in the vicinity of both ends, and then the tube is rotated in the circumferential direction, while the coating material is supplied only to the end surface of the tube. Then, the coated material is adjusted to have a substantially uniform width and thickness, thereby improving the accuracy of coating only on the end face of the circular or elliptical tubular tube, and can cope with the change of the tube as the coated object. Further, according to the present invention, since the applied material does not protrude from the end surface of the tube, the applied material itself is not peeled off or transferred to the other tube even if it receives an impact.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an apparatus for realizing a method for coating a pipe end face according to the present invention will be described in detail with reference to the drawings. FIG.
FIG. 2 is an explanatory view schematically showing an embodiment of an apparatus embodying the method for coating a pipe end face according to the present invention, FIG. 2 is an explanatory view as viewed from an arrow A in FIG. 1, and FIG. FIG. 2 is an explanatory diagram schematically illustrating an apparatus that embodies the present embodiment.

The apparatus according to the present embodiment disclosed in FIG.
A plurality of tubes K, K,... Arranged in a raft shape are stably held, and a tube holding table 1 for moving the tubes K with an inclination in a direction B perpendicular to the longitudinal direction thereof is provided. An adjusting device 2 for adjusting the position of the end surface by pressing the end surface of the tube K; and an adjusting device 2 disposed in the vicinity of the adjusting device 2 on the side of the direction B and rotating in the circumferential direction while stably holding the tube K. A rotating device 3 having at least two pairs of rollers 31 to be moved, and a coating material (not shown) supplied to the frame of the rotating device 3 and having a uniform width and thickness only on this end face. A follow-up device 5 that causes the coating device 4 to follow the end surface in conjunction with a coating device 4 and a contact portion 51 that is disposed on the body of the rotating device 3 and that contacts the outer periphery of the pipe K.
The main part is constituted by.

In FIG. 3, reference numeral 6 denotes a stopper disposed on the upper surface of the inclined tube holder 1 for controlling the movement of the tube K in the direction of arrow B. Although illustration is omitted,
The adjusting device 2, the rotating device 3, the coating device 4, the following device 5, and the stopper 6 are disposed near both ends of the tube K, and the operation described below is performed for both ends of the tube K. Is what is done.

The overall operation of the embodiment will be described. The tube holder 1 of the present embodiment is on an extension of a line for coating a tube (not shown) with a resin, and the tube K is moved by its own weight on the tube holder 1 having an inclined upper surface, with its peripheral surfaces being adjacent to each other. I do. Here, the movement of the pipe K is temporarily stopped by the stopper 6, and then the pipe K is adjusted by the adjusting device 2.
Is pressed to adjust the position of the end face. The pipe K whose end face position has been adjusted is the roller 31, 31,
.. While being moved upward in the circumferential direction and being rotated in the circumferential direction, while a coating material having a substantially uniform width and thickness is provided only on the end face of the pipe K (not shown).
Are then sent out from above the rollers 31, 31,... By a sending device (not shown) in the direction of arrow B and are stocked in a stock yard (not shown).

Next, referring to FIGS. 1 and 2, a specific method and apparatus for applying the coating material to the end face of the tube K will be described in detail. In the drawing, reference numeral 41 denotes a supply pipe for supplying a coating material (not shown) from a tank (not shown) to the end face K1 of the pipe K, 42 denotes a supply port thereof, and 43 denotes a width and a thickness of the supplied material. The brush as a correction tool for correcting the reference numeral 7 is a frame provided with a coating device 4 and a follow-up device 5.
Is a sensor for recognizing the distance between the tube K and the end face K1.

FIGS. 1 and 2 show that the pipe K has rollers 31,3.
1 shows a state of being placed above the space between... The pipe K is rotated from this state by the rotation of the rollers 31, 31,. On the other hand, a skeleton driving device (not shown) moves the skeleton 7 to X1- based on data on the distance between the sensor S and the end face K1 of the tube K.
It is adjusted by sliding in the X2 direction. In addition, a follower driving device (not shown) is adjusted by sliding the skeleton 7 in the Y1-Y2 direction in accordance with the follow of the follower 5. The supply port 42 and the correction tool 43 are connected to X1-X2, Y
The end face K1 is moved to a desired position by sliding in the 1-Y2 direction.

In this embodiment, the pipe K is a roller 31,
While being rotated by the rotation of 31, the paint is discharged from the supply port 42 and the width and thickness are corrected by the correcting tool 43, so that the paint is uniformly applied within a range not protruding from the end face K1. Was done. In addition, Y1 of the frame 7
Sliding in the −Y2 direction is achieved by providing a device that presses the skeleton 7 in the Y1 direction.

In this embodiment, since the coating device and the follow-up device are integrated with the frame, the coating position can be more stably secured. In addition, a change in the pipe can be dealt with by changing the brush or the follower.

[0025]

According to the present invention, the position of the end of the tube is adjusted while the tube is stably held in the vicinity of both ends, and then the tube is rotated in the circumferential direction. It is characterized by supplying a coating material and adjusting the coating material to a substantially uniform width and thickness, thereby improving the accuracy of coating only on the end face of a circular or elliptical tube, and This has the effect of being able to cope with changes in the performance, and is also excellent in long-run performance. Further, since the present invention does not allow the applied material to protrude from the end face of the tube, the present invention has the effect that the applied material itself is not peeled off or transferred to the other tubes even if it is subjected to an impact.

[Brief description of the drawings]

FIG. 1 is an explanatory view schematically showing an embodiment of an apparatus for realizing a method for coating a pipe end face according to the present invention.

FIG. 2 is an explanatory diagram viewed from an arrow A in FIG.

FIG. 3 is an explanatory diagram schematically showing an apparatus embodying the present embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pipe holding stand 2 Adjusting device 3 Rotating device 31 Roller 4 Coating device 41 Supply pipe 42 Supply port 43 Correction tool 5 Following device 51 Contact part K pipe K1 end face

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-58-219964 (JP, A) JP-A-64-7979 (JP, A) Fully open 1974-112861 (JP, U) Fully open 61662 (JP, U) Japanese Patent Publication No. 61-52747 (JP, B2) Japanese Utility Model Publication No. 62-34613 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) B05C 1/02 101 B05C 1/02 104 B05D 3/00 B05D 7/14

Claims (2)

(57) [Claims] After adjusting the end position of the tube while stably holding the tube near both ends thereof, rotating the tube in the circumferential direction, supplying the coating material only to the end surface of the tube, Abbreviated
A coating method for a pipe end face, wherein the coating method is adjusted to have a uniform width and thickness . 2. A tube holder (1) for stably holding a plurality of tubes (K, K,...) And moving the tubes (K) in a direction orthogonal to the longitudinal direction thereof, and a tube holder (1). 1) or an adjusting device (2) arranged near the pipe holding table (1) for pressing the end face (K1) of the pipe (K) to adjust the position of the end face, and a pipe of the adjusting device (2). A rotating device (3) disposed near the moving direction side and having two or more pairs of rollers (31, 31,...) For rotating the tube (K) in the circumferential direction while stably holding the tube (K);
And the end face (K) held by the rotating device (3).
1) and a supply pipe (41) for supplying the coating material only to the end face (K1), and a supply pipe (41) provided near the supply port (42) for applying the coating substance to the end face (K1). K1)
A coating device (4) provided with a correction tool (43) for expanding the surface to a substantially uniform width and thickness, and a contact portion connected to the coating device (4) and brought into contact with the outer periphery of the pipe (K). A coating device for a pipe end face, comprising: a follower (5) for making the supply port (42) and the correction tool (43) follow the end face (K1) in conjunction with (51).