Door device and work booth

Abstract

To provide a door device and a work booth that can supply and exhaust air to and from the inside of a booth body from the door device that closes an opening through which workpieces are carried in and out, and can also be applied to opening and closing a large opening. [Solution] The present invention is a door device provided at openings 15, 16 of a booth body 10 that stores work W, in which at least one of one or more door elements that close the openings 15, 16 has a door-side connecting portion that is connected to an air intake and exhaust device 50 when the openings 15, 16 are closed, a hollow portion 26 that communicates with the air intake and exhaust device 50 via the door-side connecting portion, and a ventilation portion 27 that is provided on the surface facing inside the booth body 10 and communicates the hollow portion 26 with the booth body 10.

Description

[Technical Field]

[0001] The present invention relates to a door device that is provided at an opening of a booth body and is capable of supplying air into the booth body or exhausting air from the booth body. [Background technology]

[0002] In a work booth where workpieces are painted, dried, etc., the workpieces are carried into the booth body through an opening provided in the booth body, and then the opening is closed with a door device, and the exhaust device and air supply device are operated to ventilate the inside of the booth body.

[0003] In such work booths, in order to improve ventilation efficiency inside the booth body, it has been proposed to supply air into the booth body from a door device that opens and closes the opening (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-51904 Summary of the Invention [Problem to be solved by the invention]

[0005] The door device installed in the work booth of Patent Document 1 opens and closes the opening via a hinge, making it easy to ensure airtightness, but if the opening becomes large, a large space is required to rotate the door, making opening and closing operations difficult, which makes it difficult to apply to work booths that store large workpieces.

[0006] The present invention has been made in consideration of the above points, and its object is to provide a door device and a work booth that can supply and exhaust air to the inside of the booth body from the door device that closes the opening through which workpieces are brought in and out, and that can also be used to open and close large openings. [Means for solving the problem]

[0007] The present invention includes the embodiments shown below.

[0008] [1] A door device provided at an opening of a booth body that accommodates workpieces, the door device comprising: one or more door elements that close the opening; an opening / closing device that moves the door element upward to open the opening and moves the door element downward from the open state to close the opening; and an air supply / exhaust device that supplies air into the booth body or exhausts air from within the booth body, wherein at least one of the one or more door elements is a ventilated door element having a door-side connecting part that is connected to the air supply / exhaust device when the opening is closed, a hollow part that communicates with the air supply / exhaust device via the door-side connecting part, and a vent part that is provided on the surface facing the inside of the booth body and communicates the hollow part with the booth body.

[0009] [2] A plurality of the door members are arranged in a vertical direction to close the opening, The door device according to [1] above, wherein at least one of the plurality of door elements is the ventilation door element.

[0010] [3] The door device described in [2] above, wherein the plurality of door elements include one or more of the vent door elements and one or more panel door elements that are not connected to the air supply and exhaust device, and the panel door elements close the opening above the vent door elements.

[0011] [4] The door device according to any one of [1] to [3] above, comprising a support beam disposed above the opening and extending in the width direction of the opening, and a plurality of lifting machines disposed at intervals in the width direction and used to lift and lower the ventilation door element.

[0012] [5] The door device described in any one of [1] to [4] above, wherein the air intake and exhaust device comprises a blower provided in a housing, an air intake and exhaust side connecting part connected to the door side connecting part, and a duct connecting the housing and the air intake and exhaust side connecting part, and the blower is provided on the top surface of the booth body.

[0013] [6] The door device according to any one of the above [1] to [5], wherein the ventilation door element is provided with the door-side connecting portions at both widthwise ends of the opening.

[0014] [7] The door device according to any one of [1] to [6] above, wherein the ventilation door element is provided with guide members at both ends of the width of the opening, for guiding the vertical movement of the ventilation door element.

[0015] [8] The door device according to any one of [1] to [7] above, further comprising a stopper that restricts downward movement of the ventilation door element when the ventilation door element opens the opening.

[0016] [9] The door device according to any one of the above [1] to [8], further comprising position sensors that detect the vertical position of the ventilation door member at both widthwise ends of the opening.

[0017]

[10] A door device according to any one of [1] to [9] above, which is provided with a sensor that detects the entry of a person into the area below the ventilation door member, and when the sensor detects the entry of a person into the area, stops the operation of the opening and closing device.

[0018]

[11] A work booth comprising: a booth body for accommodating a workpiece; an opening provided at one horizontal end of the booth body; and a door device according to any one of [1] to

[10] above provided at the opening.

[0019]

[12] A work booth as described in

[11] above, wherein the booth body has a first opening provided at one horizontal end and a second opening provided at the other horizontal end, the door device has a first door device provided at the first opening and a second door device provided at the second opening, the first door device being a door device equipped with an air supply device that supplies air into the booth body as the air supply and exhaust device, and the second door device being a door device equipped with an exhaust device that exhausts air from the booth body as the air supply and exhaust device. [Effects of the Invention]

[0020] According to the present invention, it is possible to supply and exhaust air to and from the inside of the booth body through the door device that closes the opening through which workpieces are brought in and out, and it can also be applied to opening and closing large openings. [Brief explanation of the drawings]

[0021] [Figure 1] FIG. 1 is a side view of a work booth according to a first embodiment of the present invention. [Figure 2] Enlarged plan view of the main part of the work booth in Figure 1 [Figure 3] Cross section AA of Figure 2 [Figure 4] Cross section B-B of Figure 2 [Figure 5A] CC cross section of Figure 2 [Figure 5B] An enlarged side view showing a main part of an opening and closing device of an air blocking door device [Figure 6] FIG. 10 is a front view of the work booth in a state where the first door device closes the first opening. [Figure 7] Enlarged view of the main part of Figure 6 [Figure 8] FIG. 10 is an enlarged side view of a main part of the work booth in a state where the first door device closes the first opening. [Figure 9] FIG. 1 is a front view of the work booth with the first door device opening the first opening; [Figure 10] FIG. 10 is an enlarged side view of a main part of the work booth in a state where the first door device closes the first opening. [Figure 11] Block diagram of the work booth control system DETAILED DESCRIPTION OF THE INVENTION

[0022] 1. Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0023] (1) Overall configuration of work booth 1 As shown in FIG. 1, the work booth 1 of this embodiment includes a booth body 10, a first door device 18A, a second door device 18B, and a control device .

[0024] (2) Booth body 10 1 to 4, the booth body 10 includes a front wall 11 disposed at one end side in a horizontal first direction X, a rear wall 12 facing the front wall 11 in the first direction X, a ceiling wall 13 connecting the upper ends of the front wall 11 and the rear wall 12, and side walls 14, 14 connecting the side ends of the front wall 11 and the rear wall 12. A space S for accommodating workpieces is formed inside the booth body 10 surrounded by the front wall 11, the rear wall 12, the ceiling wall 13, and the side walls 14, 14.

[0025] Inside the booth body 10 of this embodiment, a space S is formed whose length in the first direction X (the distance between the front wall 11 and the rear wall 12) is longer than the length in the horizontal second direction Y perpendicular to the first direction X (the distance between the side walls 14, 14) and the vertical direction Z.

[0026] The booth body 10 has a first opening 15 in its front wall 11 and a second opening 16 in its rear wall 12. In the booth body 10, workpieces located outside are carried into the space S through the first opening 15 and the second opening 16, and workpieces located in the space S are carried out to the outside through the first opening 15 and the second opening 16. A first door device 18A is provided in the first opening 15, and a second door device 18B is provided in the second opening 16.

[0027] As shown in FIGS. 3 and 4, the space S accommodates a holding device 2 that holds the workpiece W and an application device 3 that applies paint to the workpiece W.

[0028] The holding device 2, while holding the workpiece W, slides on rails 4 laid on the floor surface 6 on which the booth body 10 is provided, and transports the workpiece W from the outside into the space S through the first opening 15 or the second opening 16, or transports the workpiece W from the space S to the outside. The holding device 2 also rotates the held workpiece W with the first direction X as the rotation axis to change the orientation of the workpiece W with respect to the coating device 3.

[0029] The coating device 3 includes a coating head that sprays paint, and a coating robot that slides on rails 5 laid on a floor surface 6 to move the coating head in a first direction X. The coating device 3 sprays paint onto the workpiece W held by the holding device 2, thereby coating the workpiece W in the space S.

[0030] In this embodiment, the work booth 1 is described as a painting booth in which the work W is painted inside the booth body 10, but the work booth 1 can be applied to various other work booths, such as a booth for drying the painted work W or a booth for blasting the work W.

[0031] (3) First door device 18A, second door device 18B The first door device 18A and the second door device 18B will be described with reference to the drawings.

[0032] 1 and 2, the first door device 18A closes the first opening 15 from outside the booth body 10 and supplies air to the space S formed inside the booth body 10. The second door device 18B closes the second opening 16 from outside the booth body 10 and exhausts the air in the space S formed inside the booth body 10 to the outside.

[0033] The first door device 18A and the second door device 18B have different air blowing directions of the blower 52 provided in the air intake and exhaust device 50 described later, but share a basic configuration. Therefore, here, the first door device 18A will be described, and for the second door device 18B, the same components as those of the first door device 18A will be assigned the same reference numerals, and detailed description of the components will be omitted.

[0034] As shown in Figures 1 to 6, the first door device 18A includes a plurality of door elements 21a, 21b, 21c, 22a, 22b, and 22c that close the first opening 15 from the outside of the booth body 10, opening and closing devices 30, 40a, 40b, and 40c that move the door elements 21a, 21b, 21c, 22a, 22b, and 22c up and down, and an air supply and exhaust device 50 that pressurizes air into a space S formed inside the booth body 10.

[0035] The multiple door elements 21a, 21b, 21c, 22a, 22b, 22c are longer in the second direction Y than the first opening 15, block the entire width of the first opening 15 (corresponding to the second direction Y), and are arranged side by side in the vertical direction Z on the outside of the front wall 11 to block the first opening 15.

[0036] The multiple door elements 21a, 21b, 21c, 22a, 22b, and 22c that close the first opening 15 are moved above the first opening 15 by the opening and closing devices 30, 40a, 40b, and 40c to open the first opening 15. The door elements 21a, 21b, 21c, 22a, 22b, and 22c that have moved above the first opening 15 are accommodated in the door accommodating section 17 provided above the first opening 15, and open the entire first opening 15 in the up-down direction Z.

[0037] The multiple door elements 21a, 21b, 21c, 22a, 22b, 22c include vent door elements 22a, 22b, 22c that are connected to the air intake and exhaust device 50 and supply pressurized air from the air intake and exhaust device 50 to the space S of the booth body 10, and flat panel door elements 21a, 21b, 21c that are not connected to the air intake and exhaust device 50. In this embodiment, the panel door elements 21a, 21b, 21c close the first opening 15 above the vent door elements 22a, 22b, 22c.

[0038] Panel door members 21a, 21b, and 21c and opening / closing device 30 that moves them up and down constitute air-blocking door device 20. Ventilation door members 22a, 22b, and 22c, together with opening / closing devices 40a, 40b, and 40c that move them up and down and air supply / exhaust device 50, constitute air supply / exhaust door device 19. In other words, first door device 18A comprises air-blocking door device 20 and air supply / exhaust door device 19.

[0039] (4) Air shutoff door device 20 In the air blocking door device 20, the panel door members 21a, 21b, and 21c close a portion of the first opening 15 to block the flow of air into and out of the space S, or open a portion of the first opening 15.

[0040] As shown in Figures 4 to 6, the panel door elements 21a, 21b, and 21c that make up the air blocking door device 20 include a first panel door element 21a that closes the top of the first opening 15, a second panel door element 21b that is arranged below the first panel door element 21a, and a third panel door element 21c that is arranged below the second panel door element 21b.

[0041] The first panel door element 21a and the second panel door element 21b are arranged offset vertically so that the bottom end of the first panel door element 21a and the top end of the second panel door element 21b overlap in the vertical direction Z. The second panel door element 21b and the third panel door element 21c are arranged offset vertically so that the bottom end of the second panel door element 21b and the top end of the third panel door element 21c overlap in the vertical direction Z.

[0042] The first panel door element 21a is disposed in a position closest to the front wall 11. The second panel door element 21b is disposed on the outer side of the first panel door element 21a (the side away from the front wall 11). The third panel door element 21c is disposed on the outer side of the second panel door element 21b, and is disposed in a position farthest from the front wall 11 among the three panel door elements 21a, 21b, and 21c. The three panel door elements 21a, 21b, and 21c are disposed close to each other in the first direction X, leaving a gap therebetween that allows them to move in the up-and-down direction Z.

[0043] A support portion 21b1 is provided on the lower end of the second panel door element 21b, facing the first panel door element 21a. The support portion 21b1 protrudes from the second panel door element 21b toward the first panel door element 21a. When the second panel door element 21b moves upward, the support portion 21b1 comes into contact with the underside of the first panel door element 21a, supporting the first panel door element 21a.

[0044] A support portion 21c1 is provided on the lower end of the third panel door member 21c, facing the second panel door member 21b. The support portion 21c1 protrudes from the third panel door member 21c toward the second panel door member 21b. When the third panel door member 21c moves upward, the support portion 21c1 comes into contact with the lower surface of the second panel door member 21b, supporting the second panel door member 21b.

[0045] As shown in FIGS. 5A and 5B, the opening and closing device 30 that moves the panel door members 21a, 21b, and 21c up and down includes a drive motor 32, a sprocket 33, a chain , and a counterweight .

[0046] The drive motor 32 is connected to a shaft 36 extending in the second direction Y via a gear (not shown). Sprockets 33 around which chains 34 are wound are provided on both ends of the shaft 36 in the second direction Y. A connecting piece 21c2 provided on the outer side of the third panel door member 21c in the second direction Y is fixed to one end of the chain 34, and a counterweight 35 is fixed to the other end of the chain 34. The counterweight 35 is housed in a weight box 38 provided on a support 37 that supports the drive motor 32 and the sprocket 33.

[0047] The drive motor 32 rotates the sprocket 33 via the shaft 36, thereby moving the third panel door element 21c fixed to one end of the chain 34 upward and downward. As the third panel door element 21c moves up and down, the counterweight 35 moves in the weight box 38 in the opposite direction to the third panel door element 21c, thereby assisting the movement of the third panel door element 21c.

[0048] The opening and closing device 30 moves the third panel door element 21c in the vertical direction Z by operating the drive motor 32, thereby moving the third panel door element 21c up and down between a position that blocks a predetermined portion of the first opening 15 and the door accommodating section 17 formed above the first opening 15.

[0049] 4 and 6, when the opening / closing device 30 rotates the drive motor 32 in one direction to move the third panel door element 21c upward from a state in which the first panel door element 21a, the second panel door element 21b, and the third panel door element 21c close the top of the first opening 15, the support portion 21c1 of the third panel door element 21c supports the underside of the second panel door element 21b, causing the second panel door element 21b to move upward together with the third panel door element 21c. When the second panel door element 21b moves upward, the support portion 21b1 of the second panel door element 21b supports the underside of the first panel door element 32a, causing the first panel door element 21a to move upward together with the second panel door element 21b. Then, the first panel door element 21a, the second panel door element 21b, and the third panel door element 21c are placed in the door accommodating portion 17 provided above the first opening 15, opening the first opening 15.

[0050] When the opening and closing device 30 rotates the drive motor 32 in the other direction to move the third panel door element 21c downward from a state in which the first opening 15 is opened by the first panel door element 21a, the second panel door element 21b, and the third panel door element 21c, the second panel door element 21b and the first panel door element 21a also move downward following the third panel door element 32c. Note that when the first panel door element 21a, the second panel door element 21b, and the third panel door element 21c, which are heavy objects, are moved downward, the drive motor 32 enters a power generating state and generates regenerative power, and therefore the opening and closing device 30 is configured to return the regenerative power generated in the drive motor 32 to the primary power line using a regenerative converter.

[0051] When the third panel door element 21c reaches a predetermined position, the opening and closing device 30 stops, and the third panel door element 21c is positioned so that it blocks a predetermined portion of the first opening 15. In addition, the first panel door element 21a and the second panel door element 21b are stopped at predetermined positions in the vertical direction Z by stoppers (not shown), and block a predetermined portion of the first opening 15.

[0052] Groove-shaped guide portions (not shown) extending in the vertical direction Z are provided on the outer sides of the first panel door member 21a, the second panel door member 21b, and the third panel door member 21c in the second direction Y. Both ends of the panel door members 21a, 21b, and 21c in the second direction Y are inserted into the guide portions, and movement in the vertical direction Z is guided by the guide portions.

[0053] (5) Intake and exhaust door device 19 4 and 6, the air intake and exhaust door device 19 includes vent door members 22a, 22b, and 22c, opening and closing devices 40a, 40b, and 40c, and an air intake and exhaust device 50. The air intake and exhaust door device 19 supplies pressurized air from the air intake and exhaust device 50 through the vent door members 22a, 22b, and 22c to the space S in the booth body 10, while the vent door members 22a, 22b, and 22c close a portion of the first opening 15 to block the flow of air into and out of the space S. Note that in the air intake and exhaust door device 19 provided in the second door device 18B, the vent door members 22a, 22b, and 22c close a portion of the first opening 15 to block the flow of air into and out of the space S, while the air intake and exhaust door device 19 exhausts air from the space S to the outside through the vent door members 22a, 22b, and 22c.

[0054] (6) First ventilation door member 22a, second ventilation door member 22b, and third ventilation door member 22c As shown in Figures 4, 6 and 7, the ventilation door members 22a, 22b, and 2c that make up the air intake and exhaust door device 19 include a first ventilation door member 22a that is arranged below the third panel door member 21c, a second ventilation door member 22b that is arranged below the first ventilation door member 22a, and a third ventilation door member 22c that is arranged below the second ventilation door member 22b and closes the bottom part of the first opening 15.

[0055] The first ventilation door member 22a is arranged offset in the vertical direction Z so that its upper end overlaps the lower end of the third panel door member 21c of the air blocking door device 20 in the vertical direction Z.

[0056] The first ventilation door member 22a and the second ventilation door member 22b are arranged offset in the vertical direction Z so that the lower end of the first ventilation door member 22a and the upper end of the second ventilation door member 22b overlap in the vertical direction Z. The second ventilation door member 22b and the third ventilation door member 22c are arranged offset in the vertical direction Z so that the lower end of the second ventilation door member 22b and the upper end of the third ventilation door member 22c overlap in the vertical direction Z.

[0057] The first vent door element 22a is disposed outside the third panel door element 21c of the air blocking door device 20, the second vent door element 22b is disposed outside the first vent door element 22a, and the third vent door element 22c is disposed outside the second vent door element 22b. The three vent door elements 22a, 22b, and 22c are disposed close to each other in the first direction X, leaving a gap sufficient to allow movement in the vertical direction Z.

[0058] In this embodiment, sealing materials 29a, 29b, 29c, 29d, 29e, and 29f made of a rubber-like elastic material are provided over the entire third panel door element 21c, the first vent door element 22a, the second vent door element 22b, and the third vent door element 22c of the air blocking door device 20 in the second direction Y, thereby sealing the gaps between adjacent door elements in the first direction X.

[0059] Specifically, the seal material 29a is provided at the lower end of the third panel door member 21c so as to protrude toward the first ventilation door member 22a, and the seal material 29b is provided at the upper end of the first ventilation door member 22a so as to protrude toward the third panel door member 21c.

[0060] After the third panel door element 21c closes the first opening 15, when the first ventilation door element 22a closes the first opening 15, the sealing material 29a comes into contact with the upper end of the first ventilation door element 22a, and the sealing material 29b comes into contact with the lower end of the third panel door element 21c, thereby closing the gap between the first ventilation door element 22a and the third panel door element 21c.

[0061] The seal material 29c is provided at the lower end of the first ventilation door member 22a so as to protrude toward the second ventilation door member 22b. The seal material 29d is provided at the upper end of the second ventilation door member 22b so as to protrude toward the first ventilation door member 22a.

[0062] After the first ventilation door member 22a closes the first opening 15, when the second ventilation door member 22b closes the first opening 15, the sealing material 29c comes into contact with the upper end of the second ventilation door member 22b, and the sealing material 29d comes into contact with the lower end of the first ventilation door member 22a, thereby closing the gap between the first ventilation door member 22a and the second ventilation door member 22b.

[0063] The seal material 29e is provided at the lower end of the second ventilation door member 22b so as to protrude toward the third ventilation door member 22c. The seal material 29f is provided at the upper end of the third ventilation door member 22c so as to protrude toward the second ventilation door member 22b.

[0064] After the second ventilation door member 22b closes the first opening 15, when the third ventilation door member 22c closes the first opening 15, the sealing material 29e comes into contact with the upper end of the third ventilation door member 22c, and the sealing material 29f comes into contact with the lower end of the second ventilation door member 22b, thereby closing the gap between the second ventilation door member 22b and the third ventilation door member 22c.

[0065] Furthermore, a sealant 29g is provided at the bottom of the third ventilation door member 22c, protruding downward over the entire length in the second direction Y. When the third ventilation door member 22c closes the first opening 15, the sealant 29g comes into contact with the floor surface 6 to seal the gap between the third ventilation door member 22c and the floor surface 6.

[0066] Next, the specific configurations of the first ventilation door member 22a, the second ventilation door member 22b, and the third ventilation door member 22c will be described. The first ventilation door member 22a, the second ventilation door member 22b, and the third ventilation door member 22c have the same basic configuration. Therefore, here, the first ventilation door member 22a will be described in detail, and for the second ventilation door member 22b and the third ventilation door member 22c, the same components as those of the first ventilation door member 22a will be assigned the same reference numerals, and a description of those components will be omitted.

[0067] As shown in Figures 4, 6 to 8, the first ventilation door member 22a comprises a rectangular parallelepiped main body portion 23, door-side connecting portions 24 provided on both sides of the main body portion 23 in the second direction Y (i.e., both sides in the width direction of the first opening 15), and a support portion 25 attached to the main body portion 23.

[0068] 4, main body 23 is a box-shaped body with hollow portion 26 provided therein, and is disposed so as to cover a portion of first opening 15 from the outside. Main body 23 is provided with ventilation portion 27 on the surface facing first opening 15. Ventilation portion 27 includes, for example, door opening 27a provided on the surface of main body 23 facing first opening 15, and ventilation filter 27b covering said opening, and allows air in hollow portion 26 to move to the outside of main body 23.

[0069] The ventilation section 27 may be provided with ventilation filters 27b having the same opening ratio over the entire door opening 27a, or the opening ratio of the ventilation filters 27b may be varied depending on the position of the door opening 27a.

[0070] For example, if door-side connecting portions 24 are provided on both sides of the main body 23 in the second direction Y and air is introduced into the main body 23 from both sides in the second direction Y, it is preferable to set the aperture ratio of the ventilation filter 27b smaller in the center than at both ends in the second direction Y. When air is introduced into the main body 23 from both sides in the second direction Y, the air merges in the center in the second direction Y and tends to be blown out from the center in the second direction Y. However, by setting the aperture ratio of the ventilation filter 27b smaller in the center than at both ends in the second direction Y, the amount of air blown out from the door opening 27a can be made uniform in the second direction Y, making it easier to flow uniformly. In the main body 23, air pressurized from the air supply / exhaust device 50 is introduced into the cavity 26. The air introduced into the cavity 26 is supplied to the space S from the ventilation portion 27 through the first opening 15.

[0071] As shown in Figures 6 and 7, the door-side connecting portion 24 is a duct that protrudes outward in the second direction Y from the main body portion 23 and opens downward. The door-side connecting portion 24 is connected to the air supply and exhaust device 50, which will be described later, when the main body portion 23 is in a state where a predetermined portion of the first opening 15 is closed. The door-side connecting portion 24 communicates with a cavity portion 26 formed in the main body portion 23, and when connected to the air supply and exhaust device 50, supplies air pressurized from the air supply and exhaust device 50 to the cavity portion 26. The support portion 25 includes an upper frame 25a provided on the top surface of the main body portion 23 and guide mounting portions 25b provided at both ends of the upper frame 25a in the second direction Y. The support portion 25 is formed, for example, by connecting multiple steel members together.

[0072] The upper frame 25a extends along the upper surface of the main body 23 in the second direction Y, outward in the second direction Y beyond the door-side connecting portion 24. The upper frame 25a is provided with a ring 25c for hooking onto a hook provided on the opening / closing device 40a.

[0073] The guide mounting portions 25b extend downward from both ends of the upper frame 25a in the second direction Y and are provided further outward in the second direction Y than the door-side connecting portions 24. The guide mounting portions 25b are provided with guide members that guide the movement of the vent door element 22a in the up-down direction Z. Specifically, a first guide roller 25d and a second guide roller 25e are provided as guide members on the surface of the guide mounting portions 25b facing outward in the second direction Y.

[0074] The first guide roller 25d is a roller that rotates around a rotation axis extending in the second direction Y. The second guide roller 25e is a roller that rotates around a rotation axis extending in the first direction X. As shown in FIGS. 7 and 8, the guide mounting portion 25b has two first guide rollers 25d arranged at an interval in the vertical direction Z, and the second guide roller 25e is arranged between the first guide rollers 25d.

[0075] The first guide roller 25d and the second guide roller 25e move along a guide rail 43 that is provided outside the second direction Y and extends in the up-down direction Z. The guide rail 43 is fixed to a support 44 that extends upward from the floor surface 6. When the first ventilation door member 22a moves up and down, its movement in the first direction X is restricted by the first guide roller 25d, and its movement in the second direction Y is restricted by the second guide roller 25e.

[0076] The first ventilation door element 22a, the second ventilation door element 22b, and the third ventilation door element 22c are provided with opening and closing devices 40a, 40b, and 40c, respectively. The first ventilation door element 22a, the second ventilation door element 22b, and the third ventilation door element 22c are lifted up or lowered by the opening and closing devices 40a, 40b, and 40c, and move up and down between a position where they close a predetermined portion of the first opening 15 and a door receiving portion 17 formed above the first opening 15.

[0077] (7) Opening and closing devices 40a, 40b, and 40c Next, the opening and closing devices 40a, 40b, and 40c will be described.

[0078] The opening and closing device 40a is connected to the first ventilation door member 22a and lifts and lowers the first ventilation door member 22a. The opening and closing device 40b is connected to the second ventilation door member 22b and lifts and lowers the second ventilation door member 22b. The opening and closing device 40c is connected to the third ventilation door member 22c and lifts and lowers the third ventilation door member 22c.

[0079] The opening and closing devices 40a, 40b, and 40c have different ranges for suspending the first ventilation door element 22a, the second ventilation door element 22b, and the third ventilation door element 22c, but have the same basic configuration. Therefore, only the opening and closing device 40a will be described here, and the same components as those of the opening and closing device 40a will be assigned the same reference numerals, and descriptions of those components will be omitted.

[0080] The opening and closing device 40 a includes a support beam 41 provided above the first opening 15 of the booth body 10 , and a lifting machine 42 provided on the support beam 41 .

[0081] The support beam 41 extends in the second direction Y at a position above the door accommodating portion 17 that accommodates the vent door members 22a, 22b, 22c and the panel door members 21a, 21b, 21c when the first opening 15 is open.

[0082] Both ends of the support beam 41 in the second direction Y are supported by supports 44 extending in the vertical direction along guide rails 43 from the floor surface 6 on which the booth body 10 is provided. A plurality of (two in this embodiment) lifting machines 42, 42 are provided on the support beam 41 at intervals in the second direction Y.

[0083] The lifting machine 42 is, for example, a known two-point horizontal electric chain hoist equipped with a pair of load chains 42a, 42a. The lifting machine 42 has the pair of load chains 42a, 42a connected to the rings 42c of the first ventilation door member 22a. The lifting machine 42 simultaneously winds up and down the pair of load chains 42a, 42a, thereby horizontally lifting and lowering the first ventilation door member 22a at two locations spaced apart in the second direction Y. In this embodiment, two lifting machines 42, 42 spaced apart in the second direction Y are each connected to the first ventilation door member 22a at two locations spaced apart in the second direction Y, thereby horizontally lifting and lowering the first ventilation door member 22a at a total of four locations.

[0084] Such an opening and closing device 40a is provided with a first position sensor 45 and a second position sensor 46 that detect the vertical position of the first ventilation door member 22a, and a stopper 47 that prevents the first ventilation door member 22a from falling.

[0085] As shown in FIGS. 6 to 10, a plurality of first position sensors 45 are attached to both sides of the first ventilation door member 22a in the second direction Y at intervals in the up-down direction Z. The plurality of first position sensors 45 are, for example, limit switches, and are fixed to supports 44 that support the guide rail 43. When the first ventilation door member 22a passes a predetermined position in the up-down direction Z, the detection pieces of the plurality of first position sensors 45 arranged at corresponding positions are operated by operating units 28 provided on both sides of the first ventilation door member 22a in the second direction Y. In this way, the plurality of first position sensors 45 detect the position in the up-down direction Z of both ends of the first ventilation door member 22a in the second direction Y.

[0086] In addition, second position sensors 46 are provided at both ends of the support beam 41 in the second direction Y to detect the position in the up-down direction Z of the first ventilation door element 22a at both ends in the second direction Y. The second position sensors 46 detect the position in the up-down direction Z of the first ventilation door element 22a based on the different positions of the first position sensor 45 and the first ventilation door element 22a. The second position sensor 46 is a different type of sensor from the first position sensor 45, and is, for example, a wire-type displacement sensor. The second position sensors 46 measure the distance in the up-down direction Z from the support beam 41 to the upper frame 25a of the first ventilation door element 22a at both ends of the support beam 41 in the second direction Y.

[0087] 9 and 10, the stopper 47 includes a support plate 47a and a drive device 47b, such as an air cylinder, that moves the support plate 47a in the second direction Y. The stopper 47 is attached to a support 44 that supports the guide rail 43, and is disposed in the door accommodating section 17, on both sides of the first ventilation door member 22a in the second direction Y.

[0088] The support plate 47a is moved by the drive device 47b between a stop position below the first ventilation door member 22a arranged in the door accommodating section 17 and a retracted position further outward in the second direction Y than the first ventilation door member 22a.

[0089] The stopper 47 places the support plate 47a in a stop position to restrict downward movement of the first ventilation door element 22a while the first ventilation door element 22a is positioned in the door housing portion 17. When the first ventilation door element 22a moves downward from the door housing portion 17, the stopper 47 causes the drive device 47b to move the support plate 47a from the stop position to the retracted position. While the first ventilation door element 22a is positioned below the door housing portion 17, the stopper 47 continues to place the support plate 47a in the retracted position. Then, when the first ventilation door element 22a rises and is positioned in the door housing portion 17, the stopper 73 causes the drive device 73b to move the support plate 73a from the retracted position to the stop position, restricting downward movement of the first ventilation door element 22a.

[0090] 2 and 9, reference numeral 48 denotes an entry detection sensor that detects that a worker or object has entered below the first door device 18A. The entry detection sensor 48 is made up of an area scanner or the like, and detects that a person or object has entered a predetermined area including at least the areas below the first ventilation door member 22a, the second ventilation door member 22b, and the third ventilation door member 22c.

[0091] (8) Intake and exhaust equipment 50 Next, we will explain the air intake and exhaust device 50. As shown in Fig. 4, the air intake and exhaust device 50 includes a blower 52 provided in a housing 51, an air intake and exhaust side connecting part 53 connected to the door side connecting parts 24 provided on the first ventilation door member 22a, the second ventilation door member 22b, and the third ventilation door member 22c, and a duct 54 connecting the housing 51 and the air intake and exhaust side connecting part 53.

[0092] The air supply and exhaust device 50 pressurizes the air generated by the blower 52 through the duct 54 to the air supply and exhaust side connection part 53, thereby supplying air from the door side connection part 24 into the booth body 10 through the first ventilation door element 22a, the second ventilation door element 22b, and the third ventilation door element 22c.

[0093] In the air intake and exhaust device 50 of the air intake and exhaust door device 19 provided in the second door device 18B, the blower 52 sucks air inside the housing 51 and exhausts it to the outside, thereby drawing air inside the booth body 10 through the ventilation section 27 into the ventilation door members 22a, 22b, and 22c, and exhausting it to the outside of the booth body 10 via the door-side connecting member 24, the air intake and exhaust side connecting member 53, and the duct 54. In other words, by changing the air blowing direction of the blower 52, the air intake and exhaust device 50 can function as an air intake device that supplies air from the ventilation door members 22a, 22b, and 22c to the space S of the booth body 10, or as an exhaust device that sucks air from the space S of the booth body 10 through the ventilation door members 22a, 22b, and 22c and exhausts it to the outside.

[0094] 2 and 3, in this embodiment, two air intake and exhaust devices 50 are provided for one door device 18A. One air intake and exhaust device 50 is connected to a door-side connector 24 provided on one side of the first ventilation door element 22a, the second ventilation door element 22b, and the third ventilation door element 22c in the second direction Y. The other air intake and exhaust device 50 is connected to a door-side connector 24 provided on the other side of the first ventilation door element 22a, the second ventilation door element 22b, and the third ventilation door element 22c in the second direction Y.

[0095] As shown in Figures 6 to 10, the air supply / exhaust side connecting portion 53 includes a connection portion 53d to which one end of the duct 54 is connected, and a first fitting portion 53a, a second fitting portion 53b, and a third fitting portion 53c that communicate with the connection portion 53d.

[0096] The first fitting portion 53a is a cylindrical member that is positioned below the door-side connecting portion 24 of the first ventilation door member 22a and opens upward. As shown in Figures 6 to 8, when the first ventilation door member 22a is positioned at a predetermined position that closes the first opening 15, the door-side connecting portion 24 of the first ventilation door member 22a fits into the first fitting portion 53a, and the first ventilation door member 22a is connected to the intake / exhaust side connecting portion 53.

[0097] The second fitting portion 53b is a cylindrical member that is positioned below the door-side connecting portion 24 of the second ventilation door element 22b and opens upward. When the second ventilation door element 22b is positioned at a predetermined position that closes the first opening 15, the door-side connecting portion 24 of the second ventilation door element 22b fits into the second fitting portion 53b, and the second ventilation door element 22b is connected to the intake / exhaust side connecting portion 53.

[0098] The third fitting portion 53c is arranged below the door-side connecting portion 24 of the third ventilation door element 22c and has a cylindrical shape that opens upward. When the third ventilation door element 22c is arranged in a predetermined position that closes the first opening 15, the door-side connecting portion 24 of the third ventilation door element 22c fits into the third fitting portion 53c, and the third ventilation door element 22c is connected to the intake / exhaust side connecting portion 53.

[0099] In the air supply / exhaust side coupling 53 of this embodiment, the connection portion 53d is located at a position farthest from the front wall 11 of the booth body 10, and the third fitting portion 53c, the second fitting portion 53b, and the first fitting portion 53a are arranged and connected in series from the connection portion 53d toward the front wall 11 in this order. In the air supply / exhaust side coupling 53, air supplied from the duct 54 to the connection portion 53d flows into the third fitting portion 53c, a portion of which is supplied to the third vent door element 22c, and the remainder flows into the second fitting portion 53b. A portion of the air flowing into the second fitting portion 53b is supplied to the second vent door element 22b, and the remainder flows into the first fitting portion 53a and is supplied to the first vent door element 22a.

[0100] 7 and 8, flange-shaped seals 53e made of a rubber-like elastic material protruding inward may be provided around the periphery of the upward openings provided in the first fitting portion 53a, the second fitting portion 53b, and the third fitting portion 53c. The seals 53e are interposed between the first fitting portion 53a, the second fitting portion 53b, and the third fitting portion 53c and the door-side connecting portions 24 of the first ventilation door member 22a, the second ventilation door member 22b, and the third ventilation door member 22c, respectively, to provide a seal therebetween.

[0101] Furthermore, a flow rate adjusting unit 53f such as a damper may be provided between the first fitting portion 53a and the second fitting portion 53b or between the second fitting portion 53b and the third fitting portion 53c. The flow rate adjusting unit 53f adjusts the flow rate of air flowing from the first fitting portion 53a to the second fitting portion 53b and the flow rate of air flowing from the second fitting portion 53b to the third fitting portion 53c, thereby adjusting the flow rate of air supplied from the first fitting portion 53a, the second fitting portion 53b, and the third fitting portion 53c to the first ventilation door member 22a, the second ventilation door member 22b, and the third ventilation door member 22c.

[0102] The intake and exhaust device 50 can be switched between an intake device and an exhaust device by simply changing the airflow direction of the blower 52. However, the type and rated output of the blower 52 may be different when the intake and exhaust device 50 is functioning as an intake device and when it is functioning as an exhaust device, or the filters and straightening plates provided in the ventilation section 27 of the ventilation door members 22a, 22b, and 22c may be different, or the opening degree of the flow rate adjustment section 53f that adjusts the amount of air flowing through the first fitting section 53a, the second fitting section 53b, and the third fitting section 53c may be different.

[0103] (9) Control device 70 As shown in FIG. 11, the work booth 1 includes a control device 70 having a processing device such as a computer and a storage device such as a memory, and an operation unit 72 for operating the control device 70.

[0104] The control device 70 is connected to the drive motor 32 of the opening / closing device 30, the lifting machine 42 of the opening / closing devices 30a, 30b, and 30c, the drive device 47b of the stopper 47, the blower 52 of the air supply and exhaust device 50, the first position sensor 45, the second position sensor 46, and the entry detection sensor 48.

[0105] The control device 70 controls the operation of the work booth 1 by controlling the operation of the drive motor 32, the lifting machine 42, the drive device 47b, and the blower 52 based on signals input from the operating unit 72, the first position sensor 45, the second position sensor 46, and the entry detection sensor 48, and a control program stored in the memory device.

[0106] (10) Operation of Work Booth 1 To use the work booth 1 described above, at least one of the first door device 18A and the second door device 18B (for example, the first door device 18A) opens at least one of the first opening 15 and the second opening 16 (for example, the first opening 15), as shown in Figures 9 and 10. That is, the opening and closing device 30 of the air blocking door device 20 moves the panel door elements 21a, 21b, and 21c upward to accommodate them in the door accommodating section 17, and the opening and closing devices 40a, 40b, and 40c of the air supply and exhaust door device 19 move the vent door elements 22a, 22b, and 22c upward to accommodate them in the door accommodating section 17.

[0107] Then, the holding device 2 holding the workpiece W moves into the booth body 10 through the first opening 15 and carries the workpiece W into the space S.

[0108] Thereafter, the opening / closing device 30 of the air-blocking door device 20 moves the panel door elements 21a, 21b, and 21c downward from the door accommodating section 17 to block the upper part of the first opening 15, and the opening / closing devices 40a, 40b, and 40c of the air supply / exhaust door device 19 move the ventilation door elements 22a, 22b, and 22c downward from the door accommodating section 17 to block the lower part of the first opening 15.

[0109] 4 and 6 to 8, when the ventilation door elements 22a, 22b, and 22c are placed in predetermined positions to close the bottom of the first opening 15, the door-side connecting portion 24 of the first ventilation door element 22a fits into the first fitting portion 53a of the air intake / exhaust side connecting portion 53, the door-side connecting portion 24 of the second ventilation door element 22b fits into the second fitting portion 53b of the air intake / exhaust side connecting portion 53, and the door-side connecting portion 24 of the third ventilation door element 22c fits into the third fitting portion 53c of the air intake / exhaust side connecting portion 53. This connects the ventilation door elements 22a, 22b, and 22c to the air intake / exhaust device 50.

[0110] When the first opening 15 is closed by the air blocking door device 20 and the air supply / exhaust door device 19, it is preferable that the panel door elements 21a, 21b, and 21c are moved downward from the door accommodating section 17 so that the air blocking door device 20 closes the first opening 15, and then the ventilation door elements 22a, 22b, and 22c are moved downward from the door accommodating section 17 so that the air supply / exhaust door device 19 closes the first opening 15.

[0111] Furthermore, when the air intake / exhaust door device 19 closes the first opening 15, it is preferable to move the first ventilation door element 22a, the second ventilation door element 22b, and the third ventilation door element 22c downward from the door accommodating section 17 in that order to close the first opening 15.

[0112] Then, when the first door device 18A closes the first opening 15 and the second door device 18B closes the second opening 16, the air intake and exhaust device 50 of one of the first door device 18A and the second door device 18B (for example, the first door device 18A) functions as an air intake device, and the air intake and exhaust device 50 of the other (for example, the second door device 18B) functions as an exhaust device.

[0113] As a result, as shown in Figures 1 and 4, the air intake and exhaust device 50 of the first door device 18A, which functions as an air intake device, supplies air pressurized from the blower 52 through the duct 54, the air intake and exhaust side connecting portion 53, and the door side connecting portion 24 to the hollow portion 26 of the ventilation door members 22a, 22b, and 22c, and then supplies the air from the ventilation portion 27 to the space S of the booth body 10.

[0114] The air supplied to the space S flows from one side to the other in the first direction X within the space S, and is then taken into the cavity 26 through the ventilation section 27 of the second door device 18B, which functions as an exhaust device. The air taken into the cavity 26 of the ventilation door members 22a, 22b, and 22c returns to the housing 51 through the door-side connecting section 24, the air supply / exhaust-side connecting section 53, and the duct 54, and is then exhausted to the outside through an exhaust pipe (not shown).

[0115] As a result, a push-pull ventilation passage is formed inside the booth body 10, forcing air in and out from the ventilation section 27 of the first door device 18A and the ventilation section 27 of the second door device 18B, which face each other in the first direction X, and ventilating the space S with a uniform air flow.

[0116] In this embodiment, vent door members 22a, 22b, and 22c are arranged below the first opening 15 and the second opening 16, and panel door members 21a, 21b, and 21c are arranged above the first opening 15 and the second opening 16. Therefore, in this embodiment, within the space S of the booth body 10, the lower portion of the space S sandwiched between the vent door members 22a, 22b, and 22c of the first door device 18A and the second door device 18B is ventilated by a uniform air flow.

[0117] Then, when work is completed in the space S of the booth body 10, the air-blocking door device 20 and the air intake / exhaust door device 19 are operated in at least one of the first door device 18A and the second door device 18B, and the panel door elements 21a, 21b, 21c and the ventilation door elements 22a, 22b, 22c are moved upward to open at least one of the first opening 15 and the second opening 16.

[0118] When the ventilation door members 22a, 22b, 22c are moving downward or upward, the first position sensor 45 and the second position sensor 46 detect the positions of the ventilation door members 22a, 22b, 22c in the up-down direction Z. The detection results from the first position sensor 45 and the second position sensor 46 are transmitted to the control device 70. The control device 70 detects an operational abnormality in the air supply / exhaust door device 19 based on the detection results from the first position sensor 45 and the second position sensor 46.

[0119] Specifically, the multiple first position sensors 45 detect the positions in the up-down direction Z of the vent door members 22a, 22b, 22c at both ends in the second direction Y. The control device 70 calculates the deviation in the up-down direction Z position between one end and the other end of the vent door members 22a, 22b, 22c in the second direction Y from the detection values ​​of the multiple first position sensors 45. Furthermore, the second position sensor 46 detects the positions in the up-down direction Z of the vent door members 22a, 22b, 22c at both ends in the second direction Y. The control device 70 calculates the deviation in the up-down direction Z position between one end and the other end of the vent door members 22a, 22b, 22c in the second direction Y from the detection values ​​of the second position sensor 46.

[0120] If at least one of the deviations in the vertical direction Z calculated based on the detection results of the multiple first position sensors 45 and second position sensors 46 is greater than a predetermined value, the control device 70 determines that the air intake and exhaust door device 19 is operating abnormally, stops the lifting machine 42, and notifies the worker of the abnormality.

[0121] In addition, when the intrusion detection sensor 48 detects that a person or object has entered a specified area including the area below the first ventilation door member 22a, the second ventilation door member 22b, and the third ventilation door member 22c, the control device 70 stops the lifting machine 42 or prohibits the operation of the lifting machine 42.

[0122] (11) Effects In the first door device 18A and the second door device 18B of this embodiment, the ventilation door elements 22a, 22b, and 22c that open and close the openings 15 and 16 are connected to the air intake and exhaust device 50 with the openings 15 and 16 closed, so that outside air can be supplied to the space S in the booth body 10 through the ventilation door elements 22a, 22b, and 22c, or the air in the space S can be exhausted to the outside. In other words, in this embodiment, outside air can be supplied or exhausted to the outside through the openings 15 and 16 through which the workpiece W is carried in and out of the booth body 10. Therefore, there is a high degree of freedom in the arrangement of the air intake and exhaust device 50 relative to the booth body 10.

[0123] In particular, when the space S of the booth body 10 is long in the direction in which the work W is carried in, as in this embodiment, the cross-sectional area perpendicular to the air flow direction in the space S becomes small, and the amount of air flow required for ventilation can be reduced.

[0124] In this embodiment, the plurality of vent door members 22a, 22b, 22c are arranged offset in the vertical direction Z so that portions of the plurality of vent door members 22a, 22b, 22c overlap in the vertical direction Z, and therefore it is possible to prevent the size and weight of the individual vent door members 22a, 22b, 22c from increasing even when the door devices 18A, 18B open and close large openings 15, 16. As a result, it is possible to reduce the size of the opening and closing devices 40a, 40b, 40c that move the vent door members 22a, 22b, 22c up and down.

[0125] In this embodiment, the vent door members 22a, 22b, and 22c close the lower portions of the openings 15 and 16 in the booth body 10, and the panel door members 21a, 21b, and 21c close the upper portions of the openings 15 and 16, so that the area through which air circulates in the space S of the booth body 10 can be limited to the lower portion of the space S. This ensures air circulation in the area where workers perform their work, while reducing the air circulation in the upper portion of the space S where no workers are present, thereby reducing the air circulation required for ventilation.

[0126] In this embodiment, a plurality of lifting machines 42 spaced apart in the second direction Y lift and lower the ventilation door members 22a, 22b, 22c, so that even if the ventilation door members 22a, 22b, 22c are long in the second direction Y, the ventilation door members 22a, 22b, 22c can be stably lifted and lowered.

[0127] In this embodiment, the housing 51 containing the blower 52 of the air intake and exhaust device 50 is provided above the ceiling wall 13 of the booth main body 10, making it possible to utilize the space above the booth main body 10 which tends to become dead space.

[0128] In this embodiment, door-side connecting portions 24 connected to the air supply and exhaust device 50 are provided on both sides of the ventilation door members 22a, 22b, and 22c in the second direction Y, so that air can circulate evenly in the second direction Y in the space S of the booth body 10.

[0129] In this embodiment, first guide rollers 25d and second guide rollers 25e are provided at both ends of the ventilation door members 22a, 22b, 22c in the second direction Y to guide the movement of the ventilation door members 22a, 22b, 22c in the vertical direction Z, so that the ventilation door members 22a, 22b, 22c can be moved up and down along the desired trajectory.

[0130] In this embodiment, a stopper 47 is provided to restrict the downward movement of the ventilation door members 22a, 22b, and 22c housed in the door housing portion 17, thereby preventing the ventilation door members 22a, 22b, and 22c from falling.

[0131] In this embodiment, the first position sensor 45 and the second position sensor 46 detect the positions in the vertical direction Z of the ventilation door members 22a, 22b, and 22c at both ends in the second direction Y, and from the deviation in the positions in the vertical direction Z at both ends in the second direction Y, the inclination of the ventilation door members 22a, 22b, and 22c relative to the horizontal direction can be detected, and an abnormal operation of the air supply and exhaust door device 19 can be detected.

[0132] In this embodiment, when the intrusion detection sensor 48 detects that a person or object has entered a specified area including the area below the first ventilation door member 22a, the second ventilation door member 22b, and the third ventilation door member 22c, the control device 70 stops the lifting machine 42 or prohibits the operation of the lifting machine 42, thereby improving the safety of the door devices 18A and 18B.

[0133] 2. Example of changes Although the embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. The above embodiments can be embodied in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. The above embodiments and their modifications are included within the scope and spirit of the invention, as well as within the scope of the invention and its equivalents as set forth in the claims.

[0134] Any one of the multiple modified examples described below may be applied to the above embodiment, or any two or more of the modified examples described below may be applied in combination. Various modifications other than the modified examples below are also possible. Components with the same configuration as the above embodiment are designated by the same reference numerals, and descriptions of those configurations will be omitted.

[0135] (1) Change example 1 In the above-described embodiment, the first opening 15 and the second opening 16 are closed by a plurality of vent door members 22a, 22b, 22c and a plurality of panel door members 21a, 21b, 21c, but the first opening 15 and the second opening 16 may be closed by one or more vent door members without using the panel door members 21a, 21b, 21c.

[0136] (2) Change example 2 In the above embodiment, the blower 52 and housing 51 that constitute the air intake and exhaust device 50 are arranged on the upper surface of the ceiling wall 13 of the booth main body 10, but the housing 51 that houses the blower 52 may also be provided on the floor surface 6 on which the booth main body 10 is installed.

[0137] (3) Change example 3 In the above embodiment, multiple lifting machines 42 are provided for each ventilation door element 22a, 22b, 22c to move the ventilation door element 22a, 22b, 22c up and down, but it is also possible to provide one lifting machine for each ventilation door element to move the ventilation door element 22, 22b, 22c up and down.

[0138] In the above embodiment, a horizontal electric chain hoist is used as the lifting machine, but various other lifting machines can be used. For example, the vent door members 22a, 22b, and 22c may each have a driven sprocket, a drive sprocket that is driven and rotated by a drive motor, and a chain wound between the driven sprocket and the drive sprocket, and the power of the drive motor may be transmitted to the drive sprocket via the chain to move the vent door members 22a, 22b, and 22c up and down.

[0139] (3) Change example 3 In the above-described embodiment, door-side connecting portions 24 that connect to the air intake / exhaust side connecting portion 53 of the air intake / exhaust device 50 are provided at both ends of the ventilation door members 22a, 22b, and 22c in the second direction Y, but door-side connecting portions may also be provided at only one end of the ventilation door members 22a, 22b, and 22c in the second direction Y.

[0140] (4) Change Example 4 In the above-described embodiment, the first door device 18A is provided at the first opening 15 in the front wall 11 of the booth body 10, the door device 18A is provided at the second opening 16 in the rear wall 12, and both the first opening 15 and the second opening 16 are provided with door devices whose vent door members move up and down to open and close the openings. However, instead of a door device whose vent door member moves up and down to open and close the opening at either the first opening 15 or the second opening 16, an air supply and exhaust device that is fixed to the floor surface 6 and does not open or close the opening may be provided. [Explanation of symbols]

[0141] 1...work booth, 6...floor, 10...booth body, 11...front wall, 12...rear wall, 13...ceiling wall, 15...first opening, 16...second opening, 17...door accommodating section, 18A...first door device, 18B...second door device, 19...air intake / exhaust door device, 20...air blocking door device, 21a...panel door element, 21c...panel door element, 21c...panel door element, 22a...ventilation door element, 22b...ventilation door element, 22c...ventilation door element, 23...main body, 24...door side connecting portion, 25...support portion, 25a...upper frame, 25b...guide mounting portion, 25c...ring, 25d...first guide roller, 25e...second Guide roller, 26... hollow portion, 27... ventilation portion, 28... operating portion, 30... opening / closing device, 40a... opening / closing device, 40b... opening / closing device, 40c... opening / closing device, 41... support beam, 42... lifting machine, 42a... load chain, 43... guide rail, 44... support column, 45... first position sensor, 46... second position sensor, 47... stopper, 47a... support plate, 47b... drive portion, 48... entry detection sensor, 50... air supply device, 51... housing, 52... blower, 53... air supply side connecting portion, 53a... first fitting portion, 53b... second fitting portion, 53c... third fitting portion, 54... duct, 70... control device

Claims

1. A door device provided at an opening of a booth body that accommodates works, One or more door members that close the opening; an opening and closing device that moves the door element upward to open the opening, and moves the door element downward from a state in which the opening is open to close the opening; an air supply and exhaust device that supplies air into the booth body or exhausts air from the booth body, At least one of the one or more door elements is a ventilated door element having a door-side connecting portion that is connected to the air supply and exhaust device when the opening is closed, a hollow portion that communicates with the air supply and exhaust device via the door-side connecting portion, and a ventilation portion that is provided on a surface facing the inside of the booth body and that communicates between the hollow portion and the booth body.

2. a plurality of the door members arranged in a vertical direction to close the opening, The door apparatus of claim 1 , wherein at least one of the plurality of door elements is the vent door element.

3. 3. The door device according to claim 2, wherein the plurality of door elements include one or more of the vent door elements and one or more panel door elements not connected to the air supply / exhaust device, and the panel door elements close the opening above the vent door elements.

4. 2. The door device according to claim 1, further comprising: a support beam disposed above the opening and extending in the width direction of the opening; and a plurality of lifting machines disposed at intervals in the width direction and configured to lift and lower the ventilation door element.

5. the air intake and exhaust device includes a blower provided in the housing, an air intake and exhaust side connecting part connected to the door side connecting part, and a duct connecting the housing and the air intake and exhaust side connecting part, The door device according to claim 1 , wherein the blower is provided on an upper surface of the booth body.

6. The door device according to claim 1 , wherein the vent door member is provided with the door-side connecting portions at both widthwise ends of the opening.

7. The door device according to claim 1 , wherein the vent door element includes guide members at both widthwise ends of the opening, for guiding the vertical movement of the vent door element.

8. The door device according to claim 1 , further comprising a stopper that restricts downward movement of the vent door member when the vent door member opens the opening.

9. The door device according to claim 1 , further comprising position sensors for detecting vertical positions of the vent door member at both widthwise ends of the opening.

10. 2. The door device according to claim 1, further comprising a sensor for detecting a person entering an area below the ventilation door member, and when the sensor detects a person entering the area, the operation of the opening and closing device is stopped.

11. A work booth comprising: a booth body for accommodating a workpiece; an opening provided at one horizontal end of the booth body; and the door device according to claim 1 provided at the opening.

12. The booth body includes a first opening provided at one end in a horizontal direction and a second opening provided at the other end in the horizontal direction, The door device includes a first door device provided at the first opening and a second door device provided at the second opening, the first door device is a door device including an air supply device that supplies air into the booth body as the air supply and exhaust device, The work booth according to claim 11, wherein the second door device is a door device provided with an exhaust device that exhausts air from inside the booth body as the air supply and exhaust device.

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