Welding post-treatment automatic painting apparatus

Abstract

The present invention relates to an automatic post-welding painting device, and more specifically, to an automatic post-welding painting device capable of automatically lowering the heated welded temperature of a scaffolding pipe, removing foreign substances during transport, and painting the welded part to produce a finished product. An automatic post-welding painting device according to one embodiment of the present invention relates to a device for painting and moving a welded scaffolding pipe while lowering its temperature during transport, and may include: a first conveyor that raises and lowers the pipe by mounting it on a first mounting bar that protrudes radially along the path of first to third input pulleys arranged in an upright triangular shape; a second conveyor that raises and lowers the pipe by mounting it on a second mounting bar that protrudes radially along the path of first to third output pulleys arranged in an upright triangular shape spaced apart from the first conveyor; a transmission unit installed toward the rear of the first conveyor to receive the pipe moving downward and then push and transmit it; a rotation unit interposed between the first conveyor and the second conveyor to grasp and rotate the pipe received from the transmission unit; and a painting unit that approaches the rotation unit and paints the pipe rotated by the rotation unit.

Description

Technology Field

[0001] The present invention relates to an automatic post-welding painting device, and more specifically, to an automatic post-welding painting device capable of automatically lowering the temperature heated by welding of scaffolding pipes, removing foreign substances during transport, and painting the welded parts to produce a finished product. Background Technology

[0002] The following description provides background information regarding the present embodiment and does not describe prior art.

[0003] Generally, temporary materials such as system scaffolding are installed at construction sites. These temporary materials are formed by weaving together pipes made of steel to create a frame. These include vertical members, horizontal members (shoring), and diagonal members arranged diagonally as needed. The vertical members are formed by installing plate-shaped brackets at predetermined intervals along the steel pipes to facilitate easy connection to the horizontal members. The brackets generally take the form of circular or polygonal plates with holes drilled at regular intervals, allowing the rings formed at the ends of the horizontal pipes to be inserted into these holes, thereby connecting them to each other.

[0004] Here, the bracket formed on the vertical member is provided separately and installed by welding along the steel pipe. A hole is formed in the center of the bracket, through which the steel pipe is passed and then welded to secure it. Subsequently, the vertical member is painted with a coating material and dried to complete the assembly.

[0005] However, all of the above-mentioned work is performed manually. A worker attaches the bracket to the steel pipe, after which a welder manually welds and forms the structure, followed by manual painting. Due to the nature of manual labor, various problems arise, such as low productivity and a high defect rate.

[0006] Therefore, in order to solve the aforementioned problems, a continuous production device for automatic welding and painting of vertical members for shoring, disclosed in Korean Patent Publication No. 10-2023-0138290, has been disclosed, but there are many areas for improvement. Prior art literature

[0007] Korean Published Patent Application No. 10-2023-0138290, Title of Invention "Automatic Welding and Painting Continuous Production Manufacturing Device for Vertical Members for Shoring" (Date of Publication: Oct. 05, 2023) The problem to be solved

[0008] The present invention was created to solve the aforementioned problems and needs, and aims to provide an automatic post-welding painting device for continuous production without interruption by automatically lowering the heated temperature of welded scaffolding pipes during transport, sequentially removing foreign substances, and painting the welded parts. means of solving the problem

[0009] To achieve the above objective, an automatic post-welding painting device according to one embodiment of the present invention relates to a device for painting and moving a welded scaffolding pipe while lowering its temperature during transport, and may include: a first conveyor that raises and lowers the pipe by mounting it on a first mounting bar that protrudes radially along the path of first to third input pulleys arranged in an upright triangular shape; a second conveyor that raises and lowers the pipe by mounting it on a second mounting bar that protrudes radially along the path of first to third output pulleys arranged in an upright triangular shape spaced apart from the first conveyor; a transmission unit installed toward the rear of the first conveyor to receive the pipe moving downward and then push and transmit it; a rotation unit interposed between the first conveyor and the second conveyor to grasp and rotate the pipe received from the transmission unit; and a painting unit that approaches the rotation unit and paints the pipe rotated by the rotation unit. Effects of the invention

[0010] According to the present invention, there is an advantage in that the scaffolding pipe heated by welding can be naturally cooled even in a narrow space by ascending and descending by bypassing the path to the upper side.

[0011] In addition, the pressing bar is folded upward by the lever cylinder, and then, as the pressing bar descends and unfolds simultaneously by the operation of the lever cylinder, it presses the upper side of the pipe to stably secure its position, which has the advantage of making it easier to apply.

[0012] In addition, when the second holder spreads apart at both ends of the pipe, it naturally falls due to the weight of the pipe and settles on the first mounting bar at a predetermined height below, while simultaneously having the advantage of being able to shake off foreign substances embedded on the pipe surface with a slight impact.

[0013] The effects according to the present invention are not limited to those exemplified above, and a wider variety of effects are included in the specification of the present invention. Brief explanation of the drawing

[0014] FIG. 1 is a side view illustrating an automatic post-welding painting device according to an embodiment of the present invention. FIG. 2 is a side view of an automatic post-welding painting device according to an embodiment of the present invention. FIG. 3 is a plan view illustrating an automatic post-welding painting device according to an embodiment of the present invention. FIG. 4 is an enlarged plan view of section "A" in FIG. 1 and FIG. 3. FIGS. 5 and 6 are photographs of a part of an automatic post-welding painting device according to an embodiment of the present invention. FIG. 7 is an enlarged side view of section "B" of FIG. 1. FIGS. 8 and 9 are other photographs of a part of an automatic post-welding painting device according to an embodiment of the present invention. FIG. 10 is an enlarged view of section "C" of FIG. 1. FIG. 11 is an enlarged side view of section "D" of FIG. 1. Specific details for implementing the invention

[0015] The present invention is capable of various modifications and may have various embodiments. Specific embodiments are illustrated in the drawings and described in detail in the detailed description.

[0016] However, this is not intended to limit the invention to specific embodiments, and it should be understood that it includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the invention.

[0017] Furthermore, the components of the embodiments described with reference to each drawing are not limited to the respective embodiments and may be implemented to be included in other embodiments within the scope of maintaining the technical concept of the present invention. It is also obvious that multiple embodiments may be re-implemented as a single embodiment that integrates multiple embodiments, even if a separate description is omitted.

[0018] In addition, when describing with reference to the attached drawings, identical components are assigned the same or related reference numerals regardless of drawing symbols, and redundant descriptions thereof are omitted.

[0019] In describing the present invention, if it is determined that a detailed description of related prior art could unnecessarily obscure the essence of the present invention, such detailed description is omitted.

[0021] The present invention proposes an automatic post-welding painting device that improves upon conventional technology to enable continuous, uninterrupted production by automatically lowering the heated temperature of welded scaffolding pipes even in narrow spaces while transporting them, sequentially removing foreign substances, and painting the welded parts.

[0023] FIG. 1 is a side view illustrating an automatic post-welding painting device according to an embodiment of the present invention, FIG. 2 is a side photograph of an automatic post-welding painting device according to an embodiment of the present invention, and FIG. 3 is a plan view illustrating an automatic post-welding painting device according to an embodiment of the present invention.

[0024] In addition, FIG. 4 is a plan view showing an enlarged view of section "A" of FIG. 1 and FIG. 3, FIG. 5 and FIG. 6 are photographs of a part of an automatic post-welding painting device according to an embodiment of the present invention, and FIG. 7 is a side view showing an enlarged view of section "B" of FIG. 1.

[0025] In addition, FIGS. 8 and 9 are other photographs of a part of an automatic post-welding painting device according to an embodiment of the present invention, FIG. 10 is an enlarged view of part "C" of FIG. 1, and FIG. 11 is an enlarged side view of part "D" of FIG. 1.

[0027] Referring to the drawings above, an automatic post-welding painting device (10) according to one embodiment of the present invention relates to a device that paints and moves a welded scaffolding pipe (P) while lowering its temperature during transport, and comprises: a first conveyor (100) that raises and lowers the pipe (P) by placing it on a first mounting bar (140) that protrudes radially along the path of first to third input pulleys (110, 120, 130) arranged in an upright triangular shape; a second conveyor (200) that raises and lowers the pipe (P) by placing it on a second mounting bar (240) that protrudes radially along the path of first to third output pulleys (210, 220, 230) arranged in an upright triangular shape spaced apart from the first conveyor (100); a transmission unit (300) installed toward the rear of the first conveyor (100) that places the downward-moving pipe (P) and then pushes and transmits it; and the first It includes a rotating unit (400) interposed between a conveyor (100) and a second conveyor (200) to hold and rotate a pipe (P) received from the conveying unit (300), and a painting unit (500) that approaches the rotating unit (400) and paints the pipe (P) rotated by the rotating unit (400).

[0028] Additionally, the above-mentioned transmission unit (300) includes a first holder (310) in the shape of an "L" and a pushing cylinder (320) that moves the first holder (310) back and forth, and when the pipe (P) is seated on the first holder (310), the transmission unit (300) can advance by the pushing cylinder (320) and transmit it to the rotation unit (400).

[0029] In addition, the first holder (310) is equipped with a magnet to prevent the pipe (P) from coming off.

[0030] Additionally, the above-mentioned transfer unit (300) can form an air barrier between the first holder (310) and the pipe (P) while cooling the pipe (P) through the air ports (330) mounted diagonally on both sides of the first holder (310).

[0031] Additionally, the rotation unit (400) includes a tailstock (410) that approaches and grips both ends of the pipe (P), a pressing bar (420) that holds the position of the pipe (P) according to the rotation of the tailstock (410), a lever cylinder (430) that operates the pressing bar (420), and a rotation motor (440) that provides power to the tailstock, and one of the tailstocks (410) can receive rotational power directly from the rotation motor (440) and the other can receive rotational power from a driven connecting bar (450) connected to the rotation motor (440).

[0032] Additionally, the painting unit (500) includes a basket (510) containing paint, a basket cylinder (520) for moving the basket (510) back and forth, a paint brush (530) that tilts and rotates within the basket (510), and a tilting cylinder (540) that tilts and rotates the paint brush (530). When the painting unit (500) approaches the rotating unit (400) and the pipe (P) is rotated, the tilting cylinder (540) operates to tilt and rotate the paint brush (530) contained within the basket (510) so that it can come into contact with and apply paint to the pipe (P).

[0033] Additionally, the apparatus further includes a dropping means (600) that removes foreign matter by impact by free-falling the pipe (P) to a predetermined height after moving along the LM guide (610) on the upper part of the first conveyor (100), and the dropping means (600) may include a "V" shaped second holder (620) that is in close contact with the pipe (P) at both ends, a first slide cylinder (630) that moves the second holder (620) back and forth in a straight direction, and a second slide cylinder (640) that moves the first slide cylinder (630) along the LM guide (610).

[0034] Additionally, the dropping means (600) allows the second holder to hold both ends of the pipe (P) as the first slide cylinder (630) advances, and after the second holder (620) moves along the LM guide (610), the pipe (P) can fall freely due to its own weight and be placed on the first mounting bar (140) located below as the first slide cylinder (630) moves backward.

[0036] Then, the configuration and operation of the welding post-treatment coating device (100) according to the embodiments of the present invention will be described in detail as follows.

[0037] The welding post-treatment automatic painting device (10) proposed by the present invention is a device capable of continuous production without interruption as it can paint the welded area while transporting the welded scaffolding pipe (P) while lowering the temperature of the welded scaffolding pipe (P), and includes a first conveyor (100), a second conveyor (200), a transfer unit (300), a rotation unit (400), and a painting unit (500), as shown in FIG. 1, etc.

[0039] The first conveyor (100) is a device that moves a scaffolding pipe (P) heated by welding in a narrow space while cooling it, as illustrated in FIGS. 1 to 3, etc., and is a conveying device that mounts the pipe (P) on a plurality of first mounting bars (140) protruding radially along the path of a pair of first to third insertion pulleys (110, 120, 130) arranged in an upright triangular shape, and moves it up and down by bypassing the path to the upper side.

[0040] More specifically, as shown in FIG. 1, the first conveyor (100) is connected by a chain (or belt) to the first to third transfer pulleys (110, 120, 130) forming three axes on both sides and is operated by a transfer motor (150), and a plurality of first mounting bars (140) protruding radially along the chain gradually rise to reach the apex of a triangle and then gradually descend to rise and fall in a mountain shape.

[0041] For reference, the first to third transfer pulleys (110, 120, 130) proposed in the present invention may be sprockets with gears formed along their outer circumference, as illustrated in FIG. 1, etc.

[0042] Additionally, the first conveyor (100) supports and transports scaffolding pipes (P) by spacing them apart from both sides of the direction of travel so that they are mounted in the transverse direction. At this time, the transport motor (150) also provides transport power to the second conveyor (200) so that it can operate in conjunction with the first conveyor (100). Additionally, since the transport motor (150) is mounted on the second conveyor (200) and can receive transport power from the second conveyor (200), it can be selectively mounted on either the first or second conveyor (200).

[0043] Meanwhile, the main frame (not shown) supporting the first conveyor (100) on one side can be made of a rectangular block-shaped support structure on which equipment or devices such as the second conveyor (200), the transmission unit (300), the rotation unit (400), and the painting unit (500), which will be described later, are supported or installed, as shown in FIG. 1, etc., and can be made of a frame such as a modular metal member to facilitate transportation, and can be fixed by a factory floor or the like where the equipment can be installed.

[0045] The second conveyor (200) is a device for transporting scaffolding pipes (P) received from the first conveyor (100), as shown in FIGS. 1 to 3, etc., and has a configuration similar to that of the first conveyor (100).

[0046] That is, the second conveyor (200) is a conveying device that is spaced apart at a predetermined distance from the rear of the first conveyor (100), supports a pipe (P) on a plurality of second mounting bars (240) that protrude radially along the path of a pair of upright triangular-shaped first to third forward pulleys (210, 220, 230), and raises and lowers the pipe (P) by bypassing the path upward.

[0047] More specifically, as illustrated in FIG. 1, the second conveyor (200) is connected by a chain (or belt) to the first to third drive pulleys (210, 220, 230) forming three axes on both sides, and operates by receiving transfer power from the transfer motor (150) mounted on the first conveyor (100). A plurality of second mounting bars (240) protruding radially along the chain gradually rise to reach the apex of a triangle and then gradually descend to rise and fall in a mountain shape. Additionally, as illustrated in FIG. 1, the first to third drive pulleys (210, 220, 230) may be sprockets with gears formed along their outer circumference.

[0048] Additionally, the second conveyor (200) supports and transports the scaffolding pipe (P) by spacing it apart from both sides of the direction of travel so that it is mounted in the transverse direction. At this time, as shown in FIG. 3, the second conveyor (200) can be powered by a conveying motor (150) through a chain connecting the third input pulley (130) and the first output pulley (210).

[0049] Meanwhile, the transfer motor (150) can be mounted on the second conveyor (200) and receive transfer power from the second conveyor (200), so it can be optionally mounted on either the first or second conveyor (200).

[0051] The delivery unit (300) is a device that delivers a pipe (P) transported by the first conveyor (100) to a rotation unit (400) described later. It is a device that is installed facing the rear of the first conveyor (100), places the downwardly moving pipe (P) on it, and then pushes it to deliver it to the rotation unit (400).

[0052] That is, the delivery unit (300) may include a first holder (310), a pushing cylinder (320), and an air port (330), as shown in FIGS. 4 to 6, etc.

[0053] Here, the first holder (310) is in the shape of an "L" and supports the pipe (P) from below when it is lowered, and is equipped with a magnet to prevent the pipe (P) from coming off.

[0054] Additionally, the pushing cylinder (320) is a hydraulic or pneumatic cylinder that moves the first holder (310) back and forth, and when a pipe is placed in the first holder (310), it moves forward toward the rear and transmits it to the rotation unit (400).

[0055] For reference, the pushing cylinder (320) is a cylinder that moves in a straight line by receiving pressure such as hydraulic or pneumatic pressure, and is installed facing the rear of the first conveyor (100) to move the first holder (310) back and forth. Additionally, the pushing cylinder (320) is a hollow cylinder shape with its upper and lower ends closed, and in a sealed space where an internal piston can move back and forth, as the piston moves on one side by hydraulic or pneumatic pressure, a rod formed on the other side of the piston pushes or pulls the first holder (310), enabling it to move up and down.

[0056] Accordingly, when the pipe (P) is seated on the first holder (310), the transmission unit (300) can advance by means of the pushing cylinder (320) and transmit it to the rotation unit (400).

[0057] Additionally, the transfer unit (300) can form an air barrier between the first holder (310) and the pipe (P) while cooling the pipe (P) through the air ports (330) mounted diagonally on both sides of the first holder (310).

[0058] That is, the air port (330) is connected to an air compressor, etc., as shown in FIG. 8, and is a discharge port that receives air and discharges air at a predetermined air pressure. The discharged air removes foreign substances, etc., attached to the pipe (P) and simultaneously lowers the heated temperature formed in the pipe (P), and the air pressure helps the pipe (P) to be smoothly transferred to the rotation unit (400).

[0060] As illustrated in FIG. 1 and FIG. 7, the rotating unit (400) is a rotating device that is interposed between the first conveyor (100) and the second conveyor (200) and holds and rotates the pipe (P) received from the transmission unit (300).

[0061] That is, the rotation unit (400) proposed by the present invention includes a tailstock (410), a pressing bar (420), a lever cylinder (430), and a rotation motor (440), as shown in FIGS. 7 to 9, etc.

[0062] Here, the tailstock (410) is a means for approaching and gripping both ends of the pipe (P), and is protruding in a conical shape so as to be inserted into the inner diameter of the pipe (P) to bring both sides of the pipe (P) into close contact.

[0063] As shown in FIG. 8, the pressing bar (420) is in the shape of an "L" bent bar and is lowered by the lever cylinder (430) to press both sides of the pipe (P) so that it can rotate.

[0064] That is, the pressing bar (420) holds the position of the pipe (P) according to the rotation of the tailstock (410), allowing it to rotate stably when applying paint later.

[0065] The lever cylinder (430) is a motion cylinder that is hinged to one end of the pressing bar (420) with a lever and can operate the pressing bar (420) up and down. At this time, the pressing bar (420) is folded upward by the lever cylinder (430), and then the pressing bar (420) descends and unfolds simultaneously by the operation of the lever cylinder (430), thereby pressing the upper side of the pipe (P) to secure its position.

[0066] The rotation motor (440) is a motor that provides power to the tailstock (410) and is connected to the tailstock (410) by a chain and gear, etc., to rotate the tailstock (410).

[0067] Meanwhile, since the tailstock (410) formed on both sides of the pipe (P) is sufficiently powered by a single rotation motor (440), the rotation motor (440) can be installed on one side and connected to the opposite side by a driven connecting bar (450) as shown in FIG. 8 that can transmit power.

[0068] Accordingly, one of the tailstocks (410) can receive rotational power directly from the rotational motor (440), and the other can receive rotational power from the driven connecting bar (450) connected to the rotational motor (440). At this time, the driven connecting bar (450) is connected to the rotational motor (440) by a chain and gear, etc., to receive rotational power.

[0070] As illustrated in FIG. 9 and FIG. 10, etc., the coating unit (500) is a device that approaches the rotating unit (400) and applies paint to the pipe (P) that is rotated by the rotating unit (400).

[0071] That is, the painting unit (500) includes a basket (510), a basket cylinder (520), a paint brush (530), and a tilting cylinder (540), as illustrated in FIG. 10 and the like.

[0072] The basket (510) is formed in a tapered shape that is wider at the top and narrower at the bottom, and is a container that can hold paint. It is sufficient if the shape allows the paint to gather at the bottom so that the paint brush (530) can be applied well when placed in it.

[0073] Meanwhile, the basket (510) has a basket groove formed on its upper side where a pipe (P) is seated and can rotate, and when the painting is completed, the rotation unit (400) seats the pipe in the basket groove.

[0074] The basket cylinder (520) is a moving cylinder that moves the basket (510) back and forth, and is separated before painting, but moves along the rail with the rotating unit (400) during painting.

[0075] Additionally, when the painting is completed, the basket cylinder (520) retracts the basket (510) to transfer the pipe (P) placed on top of the basket (510) to the second conveyor (200).

[0076] The paint brush (530) is a brush member that rotates in a tilting motion within a basket (510), and has wool formed on its front end and can apply paint to the contact surface by contacting the pipe (P) through tilting motion. At this time, the pipe (P) is rotated by the rotation unit (400), and the rotating pipe (P) comes into contact with the paint brush (530) approaching from below, thereby applying paint.

[0077] The tilting cylinder (540) is a cylinder that tilts and rotates the paint brush (530), and as shown in FIG. 10 (a), it is installed on the outer surface of the basket (510) and can rotate the hinged paint brush (530) as it moves back and forth.

[0078] Accordingly, when the painting unit (500) approaches the rotating unit (400) and the pipe (P) is rotated, the tilting cylinder (540) operates to tilt and rotate the paint brush (530) contained in the basket (510) so that it can come into contact with the pipe (P) and apply paint.

[0080] As illustrated in FIG. 1 and FIG. 11, etc., the dropping means (600) is a device that removes foreign matter by impact by free-falling a pipe (P) to a predetermined height from the upper side of the first conveyor (100), and operates by moving along the LM guide (610) on the upper side of the first conveyor (100).

[0081] That is, the drop means (600) may include an LM guide (610), a second holder (620), a first slide cylinder (630), and a second slide cylinder (640).

[0082] Here, the LM guide (610) is installed on the upper part of the first conveyor (100) in the direction of travel or transport to stably guide the forward and backward movement of the second holder (620).

[0083] The second holder (620) is a "V"-shaped insertion groove that presses both ends of the pipe (P) and is a member that presses the pipe (P) at both ends by means of the first slide cylinder (630).

[0084] The first slide cylinder (630) is an operating cylinder that moves the second holder (620) back and forth in a straight direction, and presses or releases the second holder (620) against the pipe (P) by hydraulic or pneumatic pressure in a direction in which the straight direction of the second holder (620) presses against both ends of the pipe (P).

[0085] At this time, the first slide cylinder (630) moves backward so that when the second holder (620) spreads apart from both ends of the pipe (P), it naturally falls due to the weight of the pipe (P) and lands on the first mounting bar (140) at a predetermined height below, and at the same time, foreign substances (e.g., welding slag, etc.) attached to the surface of the pipe (P) can be shaken off by a slight impact.

[0086] The second slide cylinder (640) is an operating cylinder that moves the first slide cylinder (630) back and forth along the LM guide (610), and can stably slide the second holder (620) mounted on the first slide cylinder (630) back and forth in the direction of transport of the first conveyor (100).

[0087] Accordingly, the dropping means (600) proposed by the present invention allows the second holder to hold both ends of the pipe (P) as the first slide cylinder (630) advances, and after the second holder (620) moves along the LM guide (610), as the first slide cylinder (630) moves backward, the second holder (620) separates from both ends of the pipe (P), allowing the pipe (P) to fall freely due to its own weight and be placed on the first mounting bar (140) located below.

[0089] In this way, the welding post-treatment coating device (100) according to the embodiments of the present invention can be expected to have the following effects.

[0090] According to the present invention, there is an advantage in that the scaffolding pipe (P) heated by welding can be naturally cooled even in a narrow space by moving it up and down by bypassing the path to the upper side through the first conveyor (100).

[0091] In addition, the pressing bar (420) is folded upward by the lever cylinder (430), and then the pressing bar (420) is lowered and unfolded simultaneously by the operation of the lever cylinder (430), thereby pressing the upper side of the pipe (P) to stably secure its position, which has the advantage of making it easier to apply.

[0092] In addition, when the second holder (620) spreads out from both ends of the pipe (P), it naturally falls due to the weight of the pipe (P) and lands on the first mounting bar (140) at a predetermined height below, and at the same time, has the advantage of being able to shake off foreign substances, etc., embedded on the surface of the pipe (P) with a slight impact.

[0094] The above description is merely an illustrative explanation of the technical concept of the present invention, and those skilled in the art to which the present invention pertains will be able to make various modifications, changes, and substitutions within the scope of the essential characteristics of the present invention without departing from its nature.

[0095] Accordingly, the embodiments disclosed in this invention and the accompanying drawings are intended to explain, not limit, the technical concept of the invention, and the scope of the technical concept of the invention is not limited by these embodiments and the accompanying drawings.

[0096] The scope of protection of the present invention shall be interpreted by the claims set forth below, and all technical ideas within an equivalent scope shall be interpreted as being included within the scope of rights of the present invention. Explanation of the symbols

[0097] 10: Automatic post-welding painting device 100: First conveyor 110, 120, 130: 1st to 3rd transfer pulleys 140 : 1st mounting bar 150 : Transfer motor 200: 2nd conveyor 210, 220, 230: 1st to 3rd transfer pulleys 240 : 2nd mounting bar 300 : Transmission unit 310: 1st holder 320: Pushing cylinder 330 : Airport 400 : Rotating Unit 410 : Tailstock 420 : Pressure bar 430 : Lever cylinder 440 : Rotating motor 450 : Driven connection bar 500 : Painting unit 510 : Basket 520 : Basket Cylinder 530 : Paintbrush 540 : Tilting cylinder 600 : Dropping mechanism 610 : LM guide 620 : 2nd holder 630 : 1st slide cylinder 640 : 2nd slide cylinder P : Scaffolding pipe

Claims

Claim 1 In an automatic post-welding painting device for lowering the temperature of welded scaffolding pipes while painting them during transport, the device comprises: a first conveyor that raises and lowers the pipe by mounting it on a first mounting bar protruding radially along the path of first to third input pulleys arranged in an upright triangular shape; a second conveyor spaced apart from the first conveyor and raising and lowering the pipe by mounting it on a second mounting bar protruding radially along the path of first to third output pulleys arranged in an upright triangular shape; a first holder in the shape of an "L" and a pushing cylinder that moves the first holder back and forth, installed facing the rear of the first conveyor to allow the pipe to be pushed and transmitted after being seated on the pipe moving downward, wherein when the pipe is seated on the first holder, the device is advanced by the pushing cylinder and transmitted to a rotating unit, and forms an air film between the first holder and the device while cooling the temperature of the pipe through air ports mounted diagonally on both sides of the first holder; and between the first conveyor and the second conveyor An automatic post-welding painting device comprising: a rotating unit interposed therein that holds and rotates a pipe received from the transmission unit; and a painting unit that approaches the rotating unit and paints the pipe rotated by the rotating unit. Claim 2 delete Claim 3 In claim 1, the first holder is equipped with a magnet to prevent the pipe from detaching, an automatic post-welding painting device. Claim 4 delete Claim 5 In claim 1, the rotary unit comprises a tailstock that approaches and grips both ends of the pipe, a pressing bar that positions the pipe according to the rotation of the tailstock, a lever cylinder that operates the pressing bar, and a rotary motor that provides power to the tailstock, wherein one of the tailstocks receives rotary power directly from the rotary motor and the other receives rotary power from a driven connecting bar connected to the rotary motor, an automatic post-welding painting device. Claim 6 The automatic post-welding painting device according to claim 1, wherein the painting unit comprises a basket containing paint, a basket cylinder for moving the basket back and forth, a paint brush that tilts and rotates within the basket, and a tilting cylinder for tilting and rotating the paint brush; wherein when the pipe is rotated by approaching the rotating unit, the tilting cylinder operates to tilt and rotate the paint brush contained within the basket to contact the pipe and apply paint. Claim 7 The automatic post-welding painting device according to claim 1 further comprises a dropping means for removing foreign matter by free-falling the pipe to a predetermined height after moving along an LM guide installed on the upper part of the first conveyor, wherein the dropping means comprises a "V"-shaped second holder that is in close contact with the pipe at both ends, a first slide cylinder that moves the second holder back and forth in a straight direction, and a second slide cylinder that moves the first slide cylinder along the LM guide. Claim 8 In claim 7, the dropping means is such that as the first slide cylinder advances, the second holder presses and holds both ends of the pipe, and after the second holder moves along the LM guide by the second slide cylinder, as the first slide cylinder retracts, the pipe free-falls by its own weight and sits on the first mounting bar located below, an automatic post-welding painting device.

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