JP2016093769A - Air curtain generation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air curtain generation device capable of suppressing turbulent flow when a work-piece passes through an air curtain.SOLUTION: In an air curtain generation device 20, an air blowing portion 25 and an air suction portion 35 facing a lower side portion than the window 91 of the vehicle body 90 are put in a closed state by a shutter 26 when a vehicle body 90 being a work-piece passes through each air curtain P and the lower side halves of the air curtains P disappear partially. Accordingly, a situation that large turbulent flow is caused by blowing air to the vehicle body 90 is prevented.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an air curtain generating device that generates an air curtain that partitions the inside and the outside of a painting facility.

  2. Description of the Related Art Conventionally, as this type of air curtain generating apparatus, an apparatus that generates an air curtain that divides the interior of a painting booth by blowing air downward from an air outlet provided in a ceiling portion is known (for example, Patent Document 1). reference).

JP-A-11-309396 (FIG. 1)

  However, the above-described conventional air curtain generating device generates a large turbulent flow when a work (for example, a vehicle body) crosses the air curtain, and generates an air current in a work processing zone (for example, a painting zone) partitioned by the air curtain. There was a problem of adverse effects.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide an air curtain generating device capable of suppressing turbulent flow when a workpiece passes through the air curtain.

  The invention of claim 1 made to achieve the above object comprises an air ejection part and an air suction part facing each other across a work movement space in a painting facility, and the ejection air ejected from the air ejection part is An air curtain generating device that generates an air curtain that partitions the interior and exterior or interior of the painting facility by sucking with an air suction unit, wherein a plurality of sets of the air ejection unit and the air suction unit are arranged in a direction orthogonal to a moving direction of a workpiece. When the workpiece crosses the air curtain, the air curtain is partially blocked by blocking the air ejection and air suction of the air ejection portion and the air suction portion where the passage path of the ejection air is blocked by the workpiece. It is an air curtain production | generation apparatus provided with the partial switching means to be extinguished.

  A second aspect of the present invention is the air curtain generating apparatus according to the first aspect, wherein a shutter that opens and closes the air ejection part and the air suction part is provided as the partial switching means.

  The invention according to claim 3 is provided with a bypass duct that communicates between the air ejection part and the air suction part when the air ejection part and the air suction part are closed by the shutter. This is an air curtain generator.

  According to a fourth aspect of the present invention, the work is a vehicle body that moves with one of the front and rear sides of the work as a head, and the air ejection part and the air suction part are arranged to face each other in the horizontal direction. The air curtain generating device according to any one of claims 1 to 3.

  According to a fifth aspect of the present invention, when the vehicle body crosses the air curtain, the partial switching means maintains the air curtain above the lower edge of the window in the vehicle body, and from the lower edge of the window. It is an air curtain production | generation apparatus of Claim 4 which extinguishes a lower air curtain.

  According to a sixth aspect of the present invention, the plurality of sets of the air ejection portions and the air suction portions are composed of the air ejection portions and the air suction portions adjacent in the vertical direction and are sucked by the air suction portions. A first ejection suction pair that ejects air from the air ejection section, and a second ejection suction structure that is opposed to the first ejection suction pair across the work movement space and that the first ejection suction pair is turned upside down. A pair is formed, and the upper and lower center positions of the first and second jet suction pairs are opposed to the roof of the vehicle body from the side, and the jet air passing through the inside of the window in the vehicle body is formed. The air curtain generating device according to claim 5, wherein the direction and the direction of the blown air passing above the vehicle body are reversed.

  According to a seventh aspect of the present invention, the plurality of sets of the air ejection portions and the air suction portions are composed of the air ejection portions and the air suction portions adjacent in the vertical direction and are sucked by the air suction portions. A first ejection suction pair that ejects air from the air ejection section, and a second ejection suction structure that is opposed to the first ejection suction pair across the work movement space and that the first ejection suction pair is turned upside down. The pair is configured, and is disposed on the front surface of each of the first and second ejection suction pairs, and the ejection air ejected from the air ejection section while shielding the front surface of each ejection suction pair is the pair. 2. The air according to claim 1, comprising a shared shutter that can be switched between a closed state for guiding to an air suction unit and an open state for opening a front surface of each of the ejection suction pairs. It is the Ten generating device.

  The air curtain generating device according to claim 1 is configured such that a plurality of air ejection portions and air suction portions facing each other across a work moving space in the painting facility are arranged in a direction perpendicular to the moving direction of the work, and the work crosses the air curtain. In addition, the air curtain partly disappears by blocking the air blowing and air suction of the air blowing part and the air suction part where the passage path of the blowing air is blocked by the work, so the large disturbance caused by the collision of the blowing air to the work Generation of flow is prevented. Thereby, the bad influence to the airflow of the workpiece | work processing zone partitioned off with the air curtain among coating facilities is suppressed.

  The partial switching means may turn on / off the fan provided for each air ejection part and each air suction part, and as in the invention of claim 2, a shutter that opens and closes the air ejection part and the air suction part. You may provide as a partial switching means. Further, when the shutter is provided as the partial switching means, as in the invention of claim 3, when the air ejection part and the air suction part are closed by the shutter, the air ejection part and the air suction part are communicated with each other. If the bypass duct is provided, the pressure of the blown air and suction air related to the shutter can be suppressed.

  Further, when the work is a vehicle body, if the air ejection part and the air suction part are opposed to each other in the vertical direction, the range of the air curtain that disappears when the vehicle body crosses the air curtain increases. The range of the air curtain to be extinguished can be reduced by making the air ejection part and the air suction part face each other in the horizontal direction as in the air curtain generation apparatus. In that case, as in the invention of claim 5, it is sufficient to eliminate the air curtain below the lower edge of the window of the vehicle body, and even if the air curtain above the lower edge of the window is maintained, the window Since the blown air reaches from the air blowing part to the air suction part through the air, the turbulent flow is suppressed.

  According to the air curtain generating device of the sixth and seventh aspects, since air can be circulated between the first and second ejection / suction pairs, the duct can be simplified. Further, as in the air curtain generating device according to claim 6, if the upper and lower central positions of the first and second ejection suction pairs are opposed to the roof of the vehicle body from the side, the upper portion of the air curtain is configured. The air blown in opposite directions is partitioned by the roof of the vehicle, and this also suppresses the occurrence of turbulence. Further, as in the air curtain generating device of claim 7, a shutter is disposed in front of each of the first and second ejection suction pairs, and the shutter is closed when the shutter, the air ejection section, and the air suction section are shut off. As described above, the pressure of the ejected air and the suctioned air can be suppressed by shielding and guiding the ejected air ejected from the air ejecting unit to the paired air suction unit.

The perspective view of the preheat booth which concerns on one Embodiment of this invention Conceptual diagram of preheat booth Conceptual diagram of air curtain generator Shutter perspective view The conceptual diagram of the air curtain production | generation apparatus of 2nd Embodiment. The conceptual diagram of the air curtain production | generation apparatus of 3rd Embodiment The conceptual diagram of the air curtain production | generation apparatus of 4th Embodiment

[First Embodiment]
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a preheat booth 10 (corresponding to the “painting equipment” of the present invention) provided in the painting line. A conveyor 11 is provided on the bottom surface of the preheat booth 10 and its extension, and a vehicle body 90 (see FIG. 2), which is a workpiece to be coated, is attached to a jig 11J provided on the conveyor 11 so that the preheat booth 10 Is transferred from one end to the other end, and then transferred to a coating booth (not shown).

  As shown in FIG. 2, the vehicle body 90 as a workpiece is a thing before being mounted on the chassis of the vehicle, and no glass is attached to the window 91 of the vehicle body 90. The bottom surface of the preheat booth 10 and the lower surface of the vehicle body 90 are adjacent to each other with a slight clearance that does not interfere with each other.

  As conceptually shown in FIG. 2, the interior of the preheat booth 10 is partitioned by an air curtain P into a heating zone Z1 on the front side in the workpiece conveyance direction and a cooling zone Z2 on the rear side in the workpiece conveyance direction. Further, the air curtain P also partitions the front end of the heating zone Z1 and the outside of the preheat booth 10, and the rear end of the cooling zone Z2 and the outside of the preheat booth 10.

  The ceiling plate 18 and the floor plate 19 in the heating zone Z1 and the cooling zone Z2 are in a mesh shape. Then, high-temperature or low-temperature air is supplied from the back of the ceiling to the heating zone Z1 and the cooling zone Z2 through the ceiling plate 18, and the air is sucked under the floor through the floor plate 19. A part of the air sucked under the floor is discharged to the outside, and the rest is heated or cooled by the heating device 12 or the cooling device 13 and sent to the heating zone Z1 or the cooling zone Z2 together with the outside air.

  As shown in FIG. 1, in order to generate the air curtain P described above, air curtain generating devices 20 according to the present invention are provided at a plurality of locations in the longitudinal direction of the preheat booth 10. The air curtain generating device 20 includes a curtain start device 21 and a curtain terminal device 31 that face each other in the width direction of the preheat booth 10. Further, the curtain start device 21 and the curtain end device 31 each include a vertically long hood 22 that protrudes laterally from the outer surface of the preheat booth 10 and extends in the vertical direction. One side surface of each of the vertically long hoods 22 is an end opening 23 that is located substantially flush with the inner side surface of the preheat booth 10 and opens. The end opening 23 extends from the floor surface of the preheat booth 10 to the ceiling surface. It is a vertically long rectangle extending over the area.

  A relay duct 21 </ b> D communicating with the room behind the ceiling of the heating zone Z <b> 1 or the cooling zone Z <b> 2 is connected to the side opposite to the end opening 23 in the vertically long hood 22 of the curtain starting device 21. And the ventilation fan 21F is provided in the middle of the relay duct 21D, and the air behind the ceiling is blown into the preheat booth 10 from the end opening 23 of the curtain starting device 21. Moreover, the relay duct 31D connected to the floor under the heating zone Z1 or the cooling zone Z2 is connected to the side opposite to the end opening 23 in the vertically long hood 22 of the curtain terminal device 31. And the suction fan 31F is provided in the middle of the relay duct 31D, and the air in the preheat booth 10 is sucked through the end opening 23 of the curtain terminal device 31 and taken into the floor.

  As shown in FIG. 3, the end opening 23 of the curtain starting device 21 is formed in the vertical direction by a plurality of partition plates 24 spanned between the inner side surfaces of the vertically long hood 22, for example, four air ejection portions according to the present invention. It is divided into 25. Similarly, the end opening 23 of the curtain terminal device 31 is divided into, for example, four air suction portions 35 according to the present invention by a plurality of partition plates 24. And each air ejection part 25 of the curtain start device 21 and each air suction part 35 of the curtain terminal device 31 are opposed to each other in the horizontal direction orthogonal to the longitudinal direction of the preheat booth 10.

  Further, with respect to the vehicle body 90 as a workpiece, the boundary portion between the first and second air ejection portions 25, 25 and the boundary portion between the air suction portions 35, 35 from above are the windows of the vehicle body 90. 91 is opposed to the upper edge of the vehicle body 90 (ie, the roof 92 of the vehicle body 90), and the second and third air ejection portions 25, 25 and the boundary portions of the air suction portions 35, 35 from above are windows. 91 is arranged to face the lower edge portion. The entire second air ejection portion 25 and air suction portion 35 from the top correspond to the window 91, and the lower two air ejection portions 25, 25 and the air suction portions 35, 35 are provided in the vehicle body 90. The arrangement is such that it faces the lower part of the lower edge of the window 91.

  The shutters 26 shown in FIG. 4A are provided inside the preheat booth 10 in each of the air ejection portions 25 and each of the air suction portions 35. The shutter 26 has a so-called louver structure in which a plurality of strip-like louvers 26A extending in the vertical direction are arranged in parallel. Then, each louver 26A rotates around one long side portion, and all the louvers 26A are orthogonal to the inner surface of the preheat booth 10 (see FIG. 4A), and all the louvers 26A. Is switched to the closed state (see FIG. 4B) parallel to the inner surface of the preheat booth 10.

  Normally, all the shutters 26 are in an open state, and thereby, an air curtain P is formed across substantially the entire workpiece moving space 10K between the ceiling surface and the floor surface of the preheat booth 10. Then, when the work crosses the air curtain P, a part of the air curtain P is extinguished. In order to perform the control, an upstream sensor and a downstream sensor (not shown) for detecting the passage of the jig 11J of the vehicle body 90 in the conveyor 11 are provided in the vicinity of the upstream side and the downstream side of each air curtain generating device 20. The detection results of the upstream sensor and the downstream sensor are taken into a controller (not shown).

  When the upstream sensor detects the passage of the jig 11J of the conveyor 11, the controller moves the two lower bodies at the timing when the vehicle body 90 fixed to the jig 11J approaches the air curtain P. The shutter 26 of the air ejection part 25 and the air suction part 35 is switched from the open state to the closed state. When the downstream sensor detects the passage of the jig 11J of the conveyor 11, the controller moves the two lower bodies at the timing when the vehicle body 90 fixed to the jig 11J is just detached from the air curtain P. The shutter 26 of the air ejection part 25 and the air suction part 35 is returned from the closed state to the open state.

  The description regarding the structure of the air curtain production | generation apparatus 20 of this embodiment is above. Next, the effect of the air curtain production | generation apparatus 20 of this embodiment is demonstrated. When the vehicle body 90 is conveyed to the preheat booth 10 by the conveyor 11, it passes through the air curtain P and moves to the heating zone Z1 and the cooling zone Z2. Here, when the vehicle body 90 passes through each air curtain P, the air ejection part 25 and the air suction part 35 facing the lower part of the window 91 of the vehicle body 90 are closed by the shutter 26, and the air curtain The lower half of P partially disappears. As a result, a situation in which a large turbulent flow is generated due to the blown air being blown onto the vehicle body 90 is prevented. Further, although the upper half of the air curtain P is maintained, it passes through the upper part of the vehicle body 90 above the roof 92 and the inside of the window 91, so that the occurrence of turbulence is suppressed. By these, the bad influence to the airflow of the heating zone Z1 and the cooling zone Z2 partitioned by the air curtain in the preheat booth 10 can be suppressed.

[Second Embodiment]
The air curtain generating device 20V of the present embodiment is shown in FIGS. 5A and 5B, and the right jet suction device 20R and the left jet suction device that face each other in the left-right direction across the work movement space 10K. These left and right jet suction devices 20L and 20R each have two jet suction pairs 40 stacked one above the other. Each ejection suction pair 40 has a vertically long hood 40C having a size obtained by dividing the vertically long hood 22 (see FIG. 1) of the first embodiment into two vertically, and an end of the vertically long hood 40C on the workpiece moving space 10K side. The opening is partitioned into an air ejection part 41 and an air suction part 42 by a partition plate 24.

  Further, in each ejection suction pair 40 of the right ejection suction device 20R, an air ejection portion 41 is disposed above the partition plate 24 and an air suction portion 42 is disposed below, while the left ejection is reversed. In each ejection suction pair 40 of the suction device 20L, an air ejection portion 41 is disposed below the partition plate 24, and an air suction portion 42 is disposed above. And between the right and left ejection suction devices 20L and 20R, the air ejection part 41 and the air suction part 42 face each other in the horizontal direction.

  Each ejection suction pair 40 is provided with a fan 41F on the back side of the air ejection part 41, and the air in the workpiece moving space 10K is sucked into the vertically long hood 40C through the air suction part 42 by driving the fan 41F. Then, the sucked air is ejected from the air ejection part 41 to the workpiece moving space 10K. Thereby, as shown to FIG. 5 (A), an air curtain is produced | generated between the air ejection part 41 and the air suction part 42 which oppose in a horizontal direction.

  A shutter 26 </ b> V is provided on the front surface of each ejection suction pair 40. The shutter 26 has the same louver structure as the shutter 26 described above, and opens and closes the air ejection part 41 and the air suction part 42 of each ejection suction pair 40 simultaneously. This completes the description of the configuration of the present embodiment.

  In the air curtain generation device 20V of the present embodiment, when the vehicle 90 crosses the air curtain P, the shutter 26V of the lower ejection suction pair 40 in the left and right ejection suction devices 20L and 20R is closed, and the vehicle 90 The air curtain P in the lower part of the window 91 can be stopped. As a result, as in the first embodiment, it is possible to prevent a situation in which a large turbulent flow occurs due to the blown air being blown to the vehicle body 90. Moreover, according to this embodiment, since air can be circulated between the ejection suction pairs 40 and 40 of the left and right ejection suction devices 20L and 20R (see FIG. 5A), the first embodiment described above. It is possible to simplify the duct by eliminating the relay ducts 21D and 31D. In addition, when the vehicle 90 passes through the air curtain P, the mutually opposite jet air constituting the upper portion of the air curtain P is partitioned by the roof 92 of the vehicle 90. Occurrence is suppressed.

[Third Embodiment]
The air curtain generating device 20W of the present embodiment is shown in FIG. 6A, and has a structure in which an extension hood 43 is provided between the front surface of each ejection suction pair 40 of the second embodiment and the shutter 26V. It has become. When the shutter 26V is closed, a communication path that connects the upper and lower air ejection portions 41 and the air suction portion 42 is formed between the front surface of the ejection suction pair 40 and the shutter 26V. As a result, as shown in FIG. 6B, when the shutter 26V is closed, the air jetted from the air jetting portion 41 toward the shutter 26V passes through the extension hood 43 and the air suction portion 42. Is taken into the vertically long hood 40C. That is, when the shutter 26V is in the closed state, the air circulates in the ejection suction pair 40, and the pressure of the ejection air and the suction air can be suppressed.

[Fourth Embodiment]
An air curtain generating device 20X of the present embodiment is shown in FIG. 7A, which is a modification of the air curtain generating device 20 of the first embodiment, and the vertically long hood 22 is vertically moved by the partition wall 46. It is divided at the center. And the bypass duct 44 which connects between the air ejection part 25 and the air suction part 35 below the partition wall 46 is arrange | positioned under the floor of the preheat booth 10, for example. Further, both end portions of the bypass duct 44 are opened and closed by a movable lid 45. The movable lid 45 is closed when the shutter 26 is open, and is opened when the shutter 26 is closed. As a result, as shown in FIG. 7B, when the shutter 26 is closed and a part of the air curtain P disappears, the air on the air ejection part 25 side is released to the air suction part 35 side through the bypass duct 44. Can do.

[Other Embodiments]
The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various other than the following can be made without departing from the scope of the invention. It can be changed and implemented.

(1) The shutter 26 of the first embodiment has a louver structure. For example, the shutter 26 has a structure in which a fixed plate having a plurality of slits arranged in parallel and a slide plate having the same shape are stacked. A shutter with a structure that switches between an open state in which the slit group of the fixed plate and the slit group of the slide plate are overlapped, and a closed state in which the slit plate group of the slide plate is overlapped with the band plate portion group between the slits in the fixed plate. There may be.

(2) Moreover, it is good also as a structure which comprises the plate structure in which a shutter obstruct | occludes the whole air ejection part, shift | displaces to the side of an air ejection part, and opens an air ejection part.

(3) In the first embodiment, the air ejection part 25 and the air suction part 35 face each other in the horizontal direction, but the air ejection part and the air suction part may face each other in the vertical direction. However, when the workpiece is a vehicle body as in the first embodiment, if the air ejection part and the air suction part are opposed to each other in the vertical direction, the range that disappears when the vehicle body crosses the air curtain is large. However, the range of the air curtain P to be eliminated can be reduced by making the air ejection part 25 and the air suction part 35 face each other in the horizontal direction as in the first embodiment.

(4) In the first embodiment, the shutter 26 is provided to extinguish a part of the air curtain P. However, a fan is separately provided for each of the air ejection parts 25 and each of the air suction parts 35. A part of the air curtain may be extinguished by turning on and off the fan.

10 Preheat booth (painting equipment)
10K Work Moving Space 20, 20V, 20W, 20X Air Curtain Generator 25, 41 Air Blowing Unit 26, 26V Shutter 35, 42 Air Suction Unit 40 Blowing Suction Pair 44 Bypass Duct 90 Vehicle Body 91 Window P Air Curtain

Claims (7)

An air jet part and an air suction part that are opposed to each other across a work moving space in the painting facility are provided, and the jet air ejected from the air jet part is sucked by the air suction part to partition the inside or outside of the painting equipment. An air curtain generating device for generating an air curtain,
A plurality of the air ejection portions and the air suction portions are arranged in a direction orthogonal to the moving direction of the workpiece, and when the workpiece crosses the air curtain, the air ejection portion whose passage path of the ejection air is blocked by the workpiece, and The air curtain production | generation apparatus provided with the partial switching means which interrupts | blocks the air ejection and air suction of the said air suction part, and extinguishes the said air curtain partially.   The air curtain production | generation apparatus of Claim 1 provided with the shutter which opens and closes the said air ejection part and the said air suction part as said partial switching means.   The air curtain production | generation apparatus of Claim 2 provided with the bypass duct which connects between these air ejection parts and an air suction part, when the said air ejection part and the said air suction part are obstruct | occluded by the said shutter.   4. The work according to claim 1, wherein the work is a vehicle body and moves with one of the front and rear sides of the work being the head, and the air ejection part and the air suction part are arranged to face each other in the horizontal direction. The air curtain production | generation apparatus of Claim 1.   The partial switching means maintains the air curtain above the lower edge of the window in the vehicle body and extinguishes the air curtain below the lower edge of the window when the vehicle body crosses the air curtain. The air curtain production | generation apparatus of Claim 4 made to make. The plurality of sets of the air ejection portions and the air suction portions include the air ejection portions and the air suction portions adjacent to each other in the vertical direction, and the air sucked by the air suction portions from the air ejection portions. A first ejection suction pair that ejects, and a second ejection suction pair that is opposed to the first ejection suction pair across the work movement space and that has the first ejection suction pair turned upside down;
The vertical center positions of the first and second ejection suction pairs are opposed to the roof of the vehicle body from the side, the direction of the ejection air passing through the inside of the window of the vehicle body, and the vehicle body The air curtain production | generation apparatus of Claim 5 which made the direction of the blown-out air which passes the upper direction reverse. The plurality of sets of the air ejection portions and the air suction portions include the air ejection portions and the air suction portions adjacent to each other in the vertical direction, and the air sucked by the air suction portions from the air ejection portions. A first ejection suction pair that ejects, and a second ejection suction pair that is opposed to the first ejection suction pair across the work movement space and that has the first ejection suction pair turned upside down;
Arranged on the front surface of each of the first and second ejection suction pairs, guides the blown air ejected from the air ejection portion while blocking the front surface of each of the ejection suction pairs to the air suction portion which is the pair. The air curtain production | generation apparatus of Claim 1 provided with the shared shutter which can be switched to the closed state which performs, and the open state which open | releases the front surface of each said ejection suction pair as said partial switching means.

Images