JPH0824864B2 - Automatic coating equipment for the outer surface of metal pipes - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is designed to automatically, safely, reliably, efficiently and automatically operate the outer surface of a metal pipe, which is mainly installed over a high place such as a suspension wire for a bridge, a cover, etc. The present invention relates to an automatic coating device for the outer surface of a metal pipe, which can be painted selectively and contribute to environmental protection.

[0002]

2. Description of the Related Art Conventionally, the work of painting the outer surface of a metal pipe arranged over a high place such as a suspension wire for bridge-cover is generally carried out by scaffolding on the bridge as shown in FIG. Assembled by workers on the scaffolding, or on the gondola suspended from the crane, the workers manually brushed or sprayed. In FIG. 5, 1
Is a bridge-type leg that is a pillar of a bridge, 2 is a bridge girder, 3 is this bridge pier
A suspension wire for a bridge, which is arranged in parallel between the bridge girder and the bridge girder 2 in parallel, and is stretched as described above in order to suspend and support the bridge girder 2 between the pier 1 and the bridge girder 2. It is a metal pipe coated on the outer surface of each wire. 4 is a scaffold assembled for painting work, 5 is a gondola suspended from the crane, and 6 is a painting worker. However, in this case, the worker rides on a scaffold or a gondola to work at a high place, which is extremely dangerous because of the influence of wind and the like, and the work efficiency is poor due to manual work such as brush painting and spraying.
The construction cost was also high. Also, the paint drips during the work and is scattered around, which is a problem in terms of environmental protection.

On the other hand, as a method of performing painting work at a high place by a machine without manual labor, for example, Japanese Utility Model Publication 367
There is a wall adsorbing traveling device described in Japanese Patent No. 30.
As shown in FIG. 6, in this wall suction traveling device, a pair of vacuum suction crawlers 8 and 8 are arranged in parallel to the same plane on a machine frame 7, and the crawler 8 and 8 vacuum the wall H. While adsorbing, it traveled along the wall surface H and performed painting work at a high place by the painting member mounted on the machine frame 7 . In the crawlers 8 and 8, the suction belts 9 and 9 are wound between a pair of rotors, and when the rotors are driven by the traveling motor 10, the suction belts 9 and 9 rotate between the rotors. The suction belts 9, 9 have a wall surface H along the longitudinal direction.
A large number of recesses 11 are opened on the outer side surface, and the recess 1 is formed on the rear surface side of the recess 11 as described in the above-mentioned patent publication.
An appropriate number of communication holes that communicate the inner and outer surfaces of the suction belts 9, 9 through 1 are formed, and a proper number of communication chambers are communicated on the back side of the communication holes, that is, the inner surface side of the suction belts 9, 9. A support beam having holes is attached to the machine frame 7 along the rotational movement direction of the belts 9, 9. The communication chamber of the support beam is connected to an appropriate vacuum generating means such as an air ejector through a communication hole. Therefore, when the pair of crawlers 8 and 8 are rotated between the rotors and the insides of the recesses 11 of the suction belts 9 and 9 which are in contact with the wall surface H are sequentially evacuated by the vacuum generating means, the crawlers 8 and 8 are hung on the wall surface H. Do not vacuum-adsorb on and run along it. However, this conventional suction traveling device has the following problems in terms of the arrangement of the crawler, the arrangement of the coating member, and the sectional structure of the suction belt. That is, as shown in FIG. 6, in this suction traveling device, a pair of crawlers 8, 8 are arranged parallel to the machine frame 7 on the same plane, so that the coating work can be performed on a flat surface such as the wall surface H. The work for painting the outer surface of the suspension wire cover 3 for bridge cannot be performed. Further, since the support of the load such as the self-weight of the device depends on the suction force of the suction belt, the vacuum generating means becomes large-scale and the weight of the device is also restricted. Also , as shown in FIG. 7, the machine frame 7 has a single coating member.
12 is mounted, the machine frame so as paint nozzle 13 of its reciprocates travels in a direction perpendicular to the moving direction of the crawler 8
It was attached to 7 . In FIG. 7, 14 and 14 are sprockets, 15 is a chain wound between these sprockets, 16 and 16 are limit switches, 17 is a chain drive motor, and the painting nozzle 13 is attached to the chain 15 When the drive motor 17 is driven, the chain 15 rotates between the sprockets 14 and 14, and when the coating nozzle touches the limit switches 16 and 16 as the chain rotates, the rotation direction of the chain 15 changes and the coating nozzle 13 It travels back and forth between the limit switches 16 and 16. Therefore, this suction traveling device is not suitable for coating the outer surface of a metal pipe such as a suspension wire cover for a bridge because of the arrangement structure of such coating members, and the traveling directions of the crawler and the coating nozzle are different. The running speed of the crawler could not be increased, and the coating work efficiency was not excellent. Further, in this conventional suction traveling device, since the cross-sectional shape of the suction belt 9 on the side in contact with the wall surface H is flat corresponding to the wall surface H as shown in FIG. Not very suitable for adsorption run.

[0004]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems of the conventional coating work method or apparatus at a high place, and is installed mainly over a high place such as a suspension wire for a bridge-cover. It is an object of the present invention to provide an automatic coating device for the outer surface of a metal pipe, which can safely, reliably, efficiently and automatically coat the outer surface of the metal pipe, which contributes to environmental protection.

[0005]

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention has been devised in the arrangement means of a vacuum suction crawler and the coating member attached to a machine frame. Has devised a cross-sectional shape of the suction belt to further ensure the achievement of its purpose. That is, as a means for arranging the vacuum adsorption type crawler, an inner surface of one side end portion of a tubular machine frame having an appropriate length and an outer surface of a metal pipe such as a suspension wire cover for a bridge are provided. a plurality of vacuum adsorption type crawler adsorption belt runs along the longitudinal direction while vacuum suction, metal
Appropriate spacing (angle) so as to sandwich the periphery of the pipe outer surface
It is arranged and installed. In some cases, among the plurality of vacuum suction crawlers, the one disposed on the upper surface side of the outer surface of the metal pipe may be a rotating roller to receive a load such as the weight of the apparatus. The Te and disposed means painting member <br/> is the other end portion side inner surface of the machine frame, the outer surface of the metal pipe
A plurality of coating members for spraying the coating material through the coating nozzle are appropriately spaced so as to surround the outer surface of the metal pipe.
It is arranged and fixed. Further, the cross-sectional shape of the end surface of the suction belt of each vacuum suction crawler on the metal pipe side is inclined so as to correspond to a part of the curved surface of the outer surface of the metal pipe. By doing so, we are aiming for greater certainty in the close contact with the metal pipe.

[0006]

[Action] On one end side inner surface of the tubular body shaped machine frame of appropriate length, a plurality of vacuum suction crawler so as to sandwich the periphery of the metal pipe outer surface is provided by arranging appropriate intervals Therefore, when the vacuum generating means and the traveling motor are operated, the inside of many recesses of the suction belt of each crawler contacting the outer surface of the metal pipe sequentially becomes a vacuum, and each crawler moves to the metal pipe .
It runs along its longitudinal direction while vacuum adsorbing to the outer surface . The inner surface of the machine frame at the other end is the outer surface of the metal pipe.
There are multiple coating members that spray paint through the coating nozzle.
Since the crawler is fixedly arranged at appropriate intervals so as to surround the outer surface of the metal pipe, the crawler coating nozzles for a plurality of coating members are attached to the crawler along the longitudinal direction of the outer peripheral surface of the metal pipe. The coating material is simultaneously sprayed from the outer peripheral surface of the metal pipe to paint along the longitudinal direction of the outer surface of the metal pipe.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an explanatory view showing a procedure for painting a suspension wire cover for a bridge using an automatic painting apparatus according to an embodiment of the present invention. As shown in the figure, the automatic coating device 20 is attached to the outer peripheral surface of the metal pipe-shaped cover, that is, the suspension wire cover 3 for bridge, which is covered on the outer surface of the suspension wire stretched obliquely between the pier 1 and the bridge girder 2, travels along the longitudinal direction while vacuum suction in a state of sandwiching the outer peripheral surface of the wire cover 3 via a plurality of vacuum adsorption type crawler itself has, in the meantime, the outer wire cover 3
The surface is surrounded by multiple coating members that surround it.
The entire outer peripheral surface of is automatically painted. Actually, the coating work is performed when the automatic coating device 20 is first raised to the upper end of the wire cover 3 and then lowered. In the figure, 21 is an operation control device arranged on the bridge girder 2, and 22 is a control cable and paint hose for sending a control signal from the operation control device 21 to the automatic coating device 20. The worker 6 only operates the operation control device 21, and does not perform painting work or the like.

The automatic coating device 20 has a cylindrical shape with an appropriate length.
The machine frame 23, a plurality of vacuum suction crawlers 24 attached to the inner surface thereof, a load receiving rotary roller 25, and a plurality of coating members 26. As shown in FIGS. 2 and 3 , the machine frame 23 includes a pair of donut-shaped discs 23a, an appropriate number of support arms 23b connecting the discs 23a, and a cover (not shown) that covers the outer surface.
Is formed into a tubular body having an appropriate length by the machine frame 2
A load-bearing rotating roller 25 and a pair of vacuum suction crawlers 24, 24 are attached to the inner surface of one end of the load bearing roller 3. Load bearing rotating rollers 25 are mounted a plurality in the longitudinal direction center of the top of the machine frame 23, at the time of attachment to the outer peripheral surface of the wire cover 3 is disposed on the upper surface of the wire cover 3, the automatic coating apparatus Receive the load such as the weight of. The pair of vacuum suction crawlers 24, 24 are machine frames 2
3 are pivotally attached to the machine frame 23 so as to be bilaterally symmetrical to the lower part of the wire cover 3, that is, to contact the lower part of the outer peripheral surface of the wire cover 3 at an angle of 45 degrees. The cylindrical machine frame 23 is actually halved along the longitudinal direction, and is formed by connecting the pair of halves openably and closably with a hinge. One half is opened and mounted, and the vacuum suction crawlers 24, 24 are brought into contact with the outer peripheral surface of the wire cover 3 and then closed. At this time, as shown in FIG. 2, the outer peripheral surface of the wire cover 3 is sandwiched by the upper load receiving roller 25 and the pair of left and right lower vacuum suction crawlers 24, 24 supported by three points. The load receiving rotary roller 25 may be a vacuum suction type crawler in some cases. A plurality of coating members 26 are arranged on the inner surface of the machine frame 23 on the other end side . As shown in FIG. 3, five coating members 26 are provided.
It is to have each painted nozzle 26a to the machine frame in a plane of the ring shaped cylindrical body shape
Are fixed so as to be arranged at an equal angle of 72 degrees, so that the paint is simultaneously sprayed onto the entire outer circumference of the wire cover 3. In this way the double
Each coating nozzle of several coating members on the outer surface of the wire cover 3.
Since it is fixedly installed so as to surround the entire circumference of the
As compared with the case where the coating nozzle of the coating member is of a movable type, the running speed of the device and hence the coating speed can be made as high as possible. By the way, the conventional coating speed is about 1 to 1 minute.
Although it was 4 m, it was about 6 to 20 m in this device.

The specific structure of the vacuum suction type crawler 24 is the same as that of the above-mentioned conventional crower except for the sectional shape of the suction belt. That is, as shown in FIG. 2, a suction belt 24b having a plurality of recesses 24a each having a communication hole between a pair of rotors formed along the outer surface in the longitudinal direction is wound, and the suction belt 24b is a running motor. The drive of 24c causes the pair of rotors to rotate and rotate. A support beam having a communication chamber and a communication hole is provided on the back side of the suction belt 24b.
A vacuum is sequentially provided in the recesses 24a of the suction belt, which are in contact with the outer surface of the wire cover 3 by a suitable vacuum generating means through the support beam, and suction is performed. The belt 24b is vacuum-sucked to the outer surface of the wire-cover-3. Wire of suction belt 24b-cover-3
As shown in FIG. 4, the cross-sectional shape of the end portion on the opposite side to the inner surface of the wire-cover-3 corresponds to a part of the curved surface of the outer surface of the wire-cover-3. Surface 2
It is 4c. Due to this cross-sectional shape, the suction belt 2
4b closely contacts a part of the curved surface of the outer surface of the wire-cover-3,
The adhesion of the suction belt 24b to the outer surface of the wire-cover-3 becomes more reliable. 24d is a timing belt attached to the back side of the suction belt 24b, and 24e is a nevalan.

[0010]

EFFECTS OF THE INVENTION Since the present invention has the above-mentioned configuration, it solves the above-mentioned problems of the prior art and exhibits the following unique effects mainly when coating the outer surface of a metal pipe such as a suspension wire cover for a bridge. a. A plurality of vacuum adsorption crawlers that run along the longitudinal direction while vacuum adsorbing on the outer surface of the metal pipe are placed in the machine frame while sandwiching it against the outer peripheral surface of the metal pipe such as the suspension wire cover for bridge. Therefore, it is not necessary to manually build a scaffold or paint a dangerous high place by hanging a gondola as in the past, and unlike the conventional wall suction traveling device, the outer surface of the metal pipe has a circular cross section. On the other hand, it is possible to reliably perform vacuum suction traveling along its longitudinal direction, and therefore the coating work attached to the machine frame allows the painting work of the outer surface of the metal pipe such as the suspension wire cover for bridges arranged at such a high place. Safe and reliable without human intervention
It can be done efficiently, and the coated parts are cylindrical.
Since it is built into the machine frame , the paint does not drip or scatter around, which is suitable for environmental protection. b. Further, if a rotary roller is provided on the upper surface side of the outer peripheral surface of the metal pipe among the plurality of vacuum suction crawlers, it will be subjected to a load such as the weight of the apparatus. As compared with the case where only the vacuum suction type crawler receives the full load, it is not necessary to make the vacuum generating means large, and the load is not restricted, and the device can be downsized accordingly. c. Further, the cross-sectional shape of the side of the suction belt of the vacuum suction crawler that is in contact with the outer peripheral surface of the metal pipe is inclined downward inward from both ends in the longitudinal direction so as to correspond to a part of the curved surface of the outer peripheral surface of the metal pipe. In the case of the inclined surface, the adhesion to the outer peripheral surface of the metal pipe is increased, and the reliability of adsorption traveling to the outer surface of the metal pipe can be further improved. d. Coating member for injecting paint through the paint nozzle, suitably as a conventional unlike plurality surrounds the metal pipe outer peripheral surface
Since it is fixedly arranged on the inner surface of the machine frame at intervals, the coating work can be performed efficiently even if the traveling speed of the vacuum suction crawler is increased, and the work efficiency is far improved compared to the conventional one. You can

[Brief description of drawings]

FIG. 1 is an explanatory view of the use of the device of the present invention for coating work on a suspension wire for a bridge.

2A and 2B are explanatory views of an arrangement structure of a vacuum adsorption type crawler and a rotary roller with respect to a machine frame in the same apparatus, FIG. 2A is a vertical sectional front view, and FIG. 2B is a vertical sectional side view.

3A and 3B are explanatory views of an arrangement structure of a coating member with respect to a machine frame in the same apparatus, in which FIG. 3A is a side view and FIG. 3B is a front view.

FIG. 4 is an explanatory view of a structure of a suction belt in the same apparatus, (a) is a front view and (b) is a vertical side view.

FIG. 5 is an explanatory view of a conventional method of painting a suspension wire for bridge-cover.

FIG. 6 is an explanatory view of the structure of a conventional wall suction traveling device,
(A) is a plan view and (b) is a front view.

FIG. 7 is an explanatory view of an arrangement structure of a coating member in the same apparatus, (a) is a plan view showing a schematic structure of the entire apparatus,
(B) is a front view of the coating member, and (c) is a plan view thereof.

FIG. 8 is an explanatory view of a structure of a suction belt in the same apparatus, (a) is a front view, and (b) is a vertical side view.

[Explanation of symbols]

 1 bridge pier 2 bridge girder 3 suspension wire for bridge 20 cover automatic coating device 21 operation control device 22 control cable and paint hose 23 machine frame 23a donut disk 23b support arm 24 vacuum adsorption type claw La 24a Recess 24b Adsorption belt 24c Traveling motor 24d Timing belt 24e Nevalan 25 Load receiving rotary roller 26 Coating member 26a Painting nozzle

Claims (3)

[Claims] 1. Inside of one side end portion of a tubular machine frame having an appropriate length .
Surface of the metal pipe, such as a suspension wire cover for bridge, is attached to the outer surface of the metal pipe by a plurality of vacuum adsorption crawlers that run along the length of the adsorption belt while vacuum adsorbing the adsorption belt .
Is attached by arranging appropriate intervals so as to sandwich the periphery, on the other end side inner surface of the machine frame, the outer surface of the metal pipe
Multiple coating members that spray paint through the painting nozzle
Arrange appropriate intervals so as to surround the outer surface of the metal pipe.
The automatic coating device for the outer surface of the metal pipe is characterized by being fixedly installed. 2. The automatic coating device for an outer surface of a metal pipe according to claim 1, wherein one of the plurality of vacuum adsorption crawlers arranged on the upper surface side of the outer surface of the metal pipe is a rotating roller. 3. An inclination in which the end surface of the suction belt of each vacuum suction crawler on the metal pipe side inclines downward from both end portions in the longitudinal direction so as to correspond to a part of the curved surface of the outer surface of the metal pipe. 3. The automatic coating device for an outer surface of a metal pipe according to claim 1, wherein the outer surface is a surface.