Air suction and blowing devices

Abstract

The present invention provides an air suction device and an air blowing device that can further reduce air consumption without complicating the routing of electrical wiring. The present invention is an air suction device, characterized in that the air suction device comprises: an air suction mechanism, which is arranged inside a workbench and sucks air above the workbench; an air spray gun, which has a working switch for switching the working state and the stopping state of air spraying; and a linkage control valve, which switches the working state and the stopping state of the air suction mechanism by utilizing the change of the motion state of the air toward the air spray gun in linkage with the switching operation of the working state and the stopping state of the air spraying of the air spray gun performed on the working switch, wherein the air suction mechanism is configured to suck air in a pulsed manner in the working state of the air suction mechanism.

Description

Technical Field

[0001] The present invention relates to an air suction device and an air blowing device for effectively recovering air sprayed toward various parts from, for example, an air spray gun in order to perform air cleaning on the parts. Background Art

[0002] Patent Document 1 discloses a device including: a spray gun for spraying air; a net-type suction table having a suction port covered with a net; and a vacuum pump connected to the suction table to vacuum-exhaust the suction port.

[0003] In addition, Patent Document 1 discloses that a push button switch provided on the spray gun is operated to switch the spray gun to an air spray state, and that a vacuum pump is driven simultaneously with the switching.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Publication No. 2008-125818 Summary of the invention

[0007] Problem that the invention aims to solve

[0008] As mentioned above, Patent Document 1 discloses that the switching between the working state and the stopping state of the vacuum pump is linked with the switching between the working state and the stopping state of the spray gun. However, these linkages are electrically realized in the control device 13. Therefore, the push button switch 4 and the vacuum pump 8 need to be electrically connected via the control device 13 (refer to paragraph 0017 of Patent Document 1).

[0009] The inventors of this case have developed a linkage control valve that does not use electrical signals, that is, does not complicate the wiring of electrical wiring, and can switch the working state and stop state of the air suction device in conjunction with the switching operation of the working state and stop state of the air injection only by using a mechanical structure. In this way, a more convenient air suction device that can be used anywhere as long as there is compressed air can be constructed. In addition, since no electricity is used, it also has the following advantages: there is no need to worry about explosions caused by ignition (meeting explosion-proof specifications).

[0010] In addition, the inventors of this case have repeatedly conducted the following research on air suction based on the technology of pulse valves (for example, the pulse air supply valve "AXTS040-2" manufactured by SMC Corporation) that reduces air consumption by performing air injection in a pulsed state: Can air consumption be further reduced by performing air suction in a pulsed state?

[0011] Furthermore, the inventors of the present invention have repeatedly studied the form of air blowing for effectively realizing air recovery.

[0012] The present invention is based on the above background. The purpose of the present invention is to provide an air suction device that can further reduce air consumption without complicating the routing of electric wiring. In addition, the purpose of the present invention is to provide an air blowing device that can effectively recover air.

[0013] Solutions for solving problems

[0014] The present invention is an air suction device, characterized in that the air suction device comprises: an air suction mechanism, which is arranged inside a workbench and sucks the air above the workbench; an air spray gun, which has a working switch for switching the working state and the stopping state of the air spraying; and a linkage control valve, which switches the working state and the stopping state of the air suction mechanism by utilizing the change of the movement state of the air toward the air spray gun in linkage with the switching operation of the working state and the stopping state of the air spraying of the air spray gun performed on the working switch. The air suction mechanism is configured to suck air in a pulsed state when the air suction mechanism is in the working state.

[0015] According to the present invention, the linkage control valve switches the working state and the stopping state of the air injection by utilizing the change of the motion state of the air toward the air spray gun in conjunction with the switching operation of the working state and the stopping state of the air suction device, so there is no need to complicate the routing of the electric wiring. In addition, the air suction mechanism is configured to suck air in a pulsed manner, so that the air consumption can be effectively reduced, and energy saving can be achieved.

[0016] In addition, preferably, the air suction device also has a blowing mechanism, which is arranged above the workbench and blows air downward to the top of the workbench. The interlocking control valve is also linked to the switching operation of the working state and the stop state of the air spray of the air spray gun performed on the working switch to switch the working state and the stop state of the blowing mechanism by utilizing the change in the movement state of the air toward the air spray gun. The blowing mechanism is constructed to blow air in a pulsed state when the blowing mechanism is in the working state.

[0017] In this case, the air above the workbench can be effectively sucked by utilizing the synergistic effect of blowing (for example, 4 times the amount of air can be moved) and suction (for example, 3 times the amount of air can be moved) (4×3=12 times the amount of air can be moved). In addition, the air consumption can be effectively reduced without complicating the routing of the electric wiring, and energy saving can be achieved.

[0018] Alternatively, preferably, the air suction device further includes a second air suction mechanism, which is arranged above the workbench and sucks the air above the workbench upward. The interlocking control valve is also linked to the switching operation of the working state and the stop state of the air spray of the air spray gun performed on the working switch to switch the working state and the stop state of the second air suction mechanism by utilizing the change in the movement state of the air toward the air spray gun. The second air suction mechanism is also constructed to suck air in a pulsed state when the second air suction mechanism is in the working state.

[0019] In this case, the air above the workbench can be effectively sucked from both the upper and lower sides. In addition, the air consumption can be effectively reduced without complicating the routing of the electric wiring, and energy saving can be achieved.

[0020] In addition, it is preferable that the air spray gun is configured to change the air injection amount in a pulsed manner when the air spray gun is in an operating state.

[0021] This can effectively reduce air consumption and achieve energy saving.

[0022] In addition, at least at the time of the present application, only the point that the air suction mechanism is configured to suck air in a pulsed manner is required to be protected as a patent. That is, the present invention is an air suction device, characterized in that the air suction device includes an air suction mechanism, the air suction mechanism is arranged inside a workbench, and sucks air above the workbench, and the air suction mechanism is configured to suck air in a pulsed manner when the air suction mechanism is in an operating state.

[0023] In the present invention, it is also preferred that the air suction device further comprises a blowing mechanism, which is arranged above the workbench and blows air downward to the top of the workbench, and the blowing mechanism is configured to blow air in a pulsed state when the blowing mechanism is in an operating state. Alternatively, it is preferred that the air suction device further comprises a second air suction mechanism, which is arranged above the workbench and sucks the air above the workbench upward, and the second air suction mechanism is also configured to suck air in a pulsed state when the second air suction mechanism is in an operating state.

[0024] In addition, the present invention is an air blowing device, characterized in that the air blowing device comprises: an air passage, which is arranged inside a workbench to allow air above the workbench to pass through; two blowing mechanisms, which are arranged along the front-to-back direction on the rear side above the workbench to blow air toward the workbench at an angle downward to the front; and an air spray gun, which has a working switch for switching between a working state and a stop state of the air injection, and the center axis of the air blown from the front blowing mechanism passes at a position closer to the center of the workbench than the center axis of the air blown from the rear blowing mechanism.

[0025] According to the air blowing device of the present invention, the air on the workbench can be recovered by using the air blown from the rear blowing mechanism, and the air on the workbench can be further recovered by using the air blown from the front blowing mechanism in the area in front of the workbench. According to various experiments conducted by the inventor of the present case, by adopting such a front and rear two-stage blowing mechanism, the air on the workbench can be recovered efficiently (with a smaller total flow rate).

[0026] Preferably, the top of the workbench is surrounded by a left side wall, a right side wall, a rear wall and a top wall. When a front inclined lower wall and a front inclined upper wall are provided on the front side above the workbench, the upper end edge of the front inclined lower wall becomes an inlet air guide edge with a U-shaped cross-section, and the lower end edge of the front inclined upper wall also becomes an inlet air guide edge with a U-shaped cross-section.

[0027] By using the U-shaped cross-section air introduction guide edge, the introduction resistance of air introduced (sucked) from the front side to the top of the workbench is reduced, so that the air introduction is smooth. For example, the U-shaped cross-section air introduction guide edge can be formed by folding the upper edge of the front inclined lower wall and the lower edge of the front inclined upper wall inward.

[0028] In the air blowing device of the present invention, it is also preferred that the air blowing device further includes a linkage control valve, which is linked to the switching operation of the working state and the stop state of the air spray of the air spray gun performed on the working switch to switch the working state and the stop state of the two blowing mechanisms by utilizing the change of the movement state of the air toward the air spray gun.

[0029] In this case, the interlocking control valve switches the working state and the stopping state of the two blowing mechanisms in conjunction with the switching operation of the working state and the stopping state of the air injection by utilizing the change in the movement state of the air toward the air spray gun, so there is no need to complicate the routing of the electrical wiring.

[0030] In addition, it is preferable that one or both of the two blowing mechanisms are configured to blow air in a pulsed manner when the two blowing mechanisms are in an operating state.

[0031] In this case, the air consumption can be further effectively reduced, and further energy saving can be achieved.

[0032] In addition, it is preferable that the air blowing device of the present invention further includes an air suction mechanism connected to the air passage to suck the air above the workbench.

[0033] According to various experiments conducted by the inventors of the present case, by using the front and rear two-stage blowing mechanism and air suction mechanism together, the air on the workbench can be recovered more efficiently (with a smaller total flow rate).

[0034] Preferably, the air suction mechanism in this case is also configured to suck air in a pulsed manner when the air suction mechanism is in an operating state.

[0035] This makes it possible to further effectively reduce air consumption and achieve greater energy saving.

[0036] Effects of the Invention

[0037] According to the air suction device of the present invention, the linkage control valve switches the working state and the stopping state of the air injection by utilizing the change of the motion state of the air toward the air spray gun in linkage with the switching operation of the working state and the stopping state of the air suction device, so there is no need to complicate the routing of the electric wiring. In addition, the air suction mechanism is configured to suck air in a pulsed manner, so that the air consumption can be effectively reduced, and energy saving can be achieved.

[0038] In addition, the air blowing device of the present invention can recover the air on the workbench by using the air blown from the rear blowing mechanism, and further recover the air on the workbench by using the air blown from the front blowing mechanism in the area in front of the workbench. According to various experiments conducted by the inventor of the present invention, by using such a front and rear two-stage blowing mechanism, the air on the workbench can be recovered efficiently (with a smaller total flow rate). BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic front cross-sectional view of the air suction device according to the first embodiment of the present invention.

[0040] Figure 2 yes Figure 1 A schematic side cross-sectional view of an air suction device.

[0041] Figure 3 yes Figure 1Diagram of the compressed air supply system of the air suction device.

[0042] Figure 4 This is a schematic diagram for explaining the linkage control valve.

[0043] Figure 5 It is a diagram of a compressed air supply system of an air suction device according to a second embodiment of the present invention.

[0044] Figure 6 It is a diagram of a compressed air supply system of an air suction device according to a third embodiment of the present invention.

[0045] Figure 7 It is a diagram of a compressed air supply system of an air suction device according to a fourth embodiment of the present invention.

[0046] Figure 8 It is a diagram of a compressed air supply system of an air suction device according to a fifth embodiment of the present invention.

[0047] Fig. 9 It is a diagram of a compressed air supply system of an air suction device according to a sixth embodiment of the present invention.

[0048] Fig.10 It is a schematic front view of an air suction device according to a sixth embodiment of the present invention.

[0049] Fig.11 yes Fig.10 A schematic side cross-sectional view of an air suction device.

[0050] Fig.12 yes Fig.10 A top view of the mesh portion of an air suction device.

[0051] Fig.13 It is a diagram of a compressed air supply system of an air suction device according to a seventh embodiment of the present invention.

[0052] Fig.14 It is a diagram of a compressed air supply system of an air suction device according to an eighth embodiment of the present invention.

[0053] Fig.15 It is a diagram of a compressed air supply system of an air suction device according to a ninth embodiment of the present invention.

[0054] Fig.16 It is a diagram of a compressed air supply system of an air blowing device according to a tenth embodiment of the present invention.

[0055] Fig.17 It is a schematic front view of an air blowing device according to a tenth embodiment of the present invention.

[0056] Fig.18 yes Fig.17A schematic side sectional view of the blowing device.

[0057] Fig.19 yes Fig.17 A top view of the mesh portion of the blowing device.

[0058] Description of Reference Numerals

[0059] 1. Air suction device; 2. Shell; 2a. Inclined plate; 2m. Net; 3a. Left side wall; 3b. Right side wall; 3c. Front vertical wall; 3d. Front inclined wall; 3e. Rear wall; 3f. Protrusion; 10. Air spray gun; 11. Hook; 12. Working switch; 20. Vacuum device (a form of air suction mechanism); 22. Small vacuum device; 27. Dust bag; 41. Filter regulator; 42. Compressed air pipe; 43. Linkage control valve; 44. Compressed air pipe; 45. Compressed air pipe; 47. Speed ​​controller; 51. Compressed air pipe; 52. Pulse valve; 52a. Regulator for connecting time adjustment; 52b. Regulator for disconnecting time adjustment; 52c. Pneumatic valve; 53, compressed air pipe; 54, T-shaped joint; 55, compressed air pipe; 56, compressed air pipe; 57, check valve; 58, compressed air pipe; 59, T-shaped joint; 60, T-shaped joint; 61, compressed air pipe; 62, compressed air pipe; 63, T-shaped joint; 64, compressed air pipe; 70, T-shaped joint; 71, compressed air pipe; 72, compressed air pipe; 73, T-shaped joint; 74, compressed air pipe; 75, compressed air pipe; 76, Y-shaped pipe joint; 77, compressed air pipe; 78, compressed air pipe; 101, air suction device; 101', air suction device; 154, cross pipe; 155, compressed air pipe; 120, blower (blowing 120', second vacuum device (a form of the second air suction mechanism); 122, small blower (a form of the blowing mechanism) (arranged at the front position); 122a, small blower (a form of the blowing mechanism) (arranged at the front position); 122b, small blower (a form of the blowing mechanism) (arranged at the front position); 201, air suction device; 201', air suction device; 242, compressed air pipe; 243, single slot valve; 254, T-shaped connector; 301, air suction device (sixth embodiment); 301', blowing device (10th embodiment); 302, shell; 302', shell; 3 02a, inclined plate; 302m, net; 302m', net; 303a, left side wall; 303a', left side wall; 303b, right side wall; 303b', right side wall; 303c, front vertical wall; 303c', front vertical wall; 303d, front inclined lower wall; 303d', front inclined lower wall; 303e, rear wall; 303e', rear wall; 303f, protrusion; 303f', protrusion; 303g, front inclined upper wall; 303g', front inclined upper wall; 343, bottom valve; 401, air suction device (7th embodiment); 501, air suction device (8th embodiment); 601, air suction device (9th embodiment). DETAILED DESCRIPTION

[0060] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0061] Figure 1 is a schematic front cross-sectional view of an air suction device according to a first embodiment of the present invention, Figure 2 yes Figure 1 A schematic side sectional view of an air suction device, Figure 3 yes Figure 1 Diagram of the compressed air supply system of the air suction device.

[0062] like Figure 1 and Figure 2 As shown, the air suction device 1 of this embodiment has a rectangular parallelepiped housing 2. The upper surface of the housing 2 is funnel-shaped by a shallow inclined surface 2a, and on the other hand, it is flatly covered by a net 2m to form a flat workbench. The upper end of the vacuum device 20 as an air suction mechanism is connected to the lower side of the funnel-shaped inclined surface 2a. In order to ensure a larger working space on the workbench, the net 2m may not be provided, or the net 2m may be detachable.

[0063] See also Figure 3 The vacuum device 20 uses compressed air supplied from the compressed air pipe 55 to suck the air above the workbench through the net 2m into the interior (below) of the workbench. A dust bag 27 is attached to the lower end of the vacuum device 20.

[0064] return Figure 1 and Figure 2 The area above the workbench is surrounded by the left side wall 3a, the right side wall 3b, the front vertical wall 3c, the front inclined wall 3d and the rear wall 3e. Thus, it is easy to perform air jetting (cleaning) operations on the workbench to jet air to various parts, while preventing the surroundings from being polluted by the jetted air.

[0065] In addition, if Figure 1 and Figure 3 As shown, the air suction device 1 of this embodiment includes an air spray gun 10. The air spray gun 10 has an operating switch 12, and the operating state and the stop state of the air spray are switched by switching whether to hold the operating switch 12 tightly or lightly (if held tightly, it becomes the operating state, and if it returns to the state of light holding, it becomes the stop state).

[0066] Reference Figure 3 In the air suction device 1 of the present embodiment, compressed air from a compressed air source (not shown) is supplied to a linkage control valve 43 via a filter regulator 41 and a compressed air pipe 42. Furthermore, compressed air is supplied from the linkage control valve 43 to the air spray gun 10 via a compressed air pipe 44, a T-shaped joint (general name for a T-shaped pipe seat) 59, and a compressed air pipe 45. A speed controller 47 is provided in the middle of the compressed air pipe 44.

[0067] When the air injection is in the stopped state, the compressed air is not injected from the air spray gun 10. At this time, the compressed air inside the filter regulator 41, the compressed air pipe 42, the linkage control valve 43, the compressed air pipe 44, the T-joint 59 and the compressed air pipe 45 does not move.

[0068] When the air jet is in operation, compressed air is ejected from the air spray gun 10. At this time, the compressed air in the filter regulator 41, the compressed air pipe 42, the linkage control valve 43, the compressed air pipe 44, the T-joint 59 and the compressed air pipe 45 moves toward the air spray gun 10.

[0069] The change in the movement state of the compressed air toward the air spray gun 10 causes the control valve 43 to switch between blocking and supplying compressed air to the vacuum device 20. Thus, the vacuum device 20 is switched between a stopped state and an operating state.

[0070] Figure 4 4 is a schematic diagram for explaining the linkage control valve 43. Figure 4 (a) corresponds to when the air spray of the air spray gun 10 stops, Figure 4 (b) corresponds to when the air spray gun 10 is working with air spraying.

[0071] like Figure 4 As shown in (a), the interlocking control valve 43 has: a connecting hole 43a, which connects the compressed air pipe 42 on the compressed air source side and the compressed air pipe 51 on the blowing side of the vacuum equipment in a roughly horizontal direction; a cylindrical hole 43b, which is roughly perpendicular to the connecting hole 43a and extends in a roughly vertical direction; a large diameter hole 43c, which is continuous with the cylindrical hole 43b and extends in a roughly vertical direction; and a connecting hole 43d, which connects the large diameter hole 43c and the compressed air pipe 44 on the air spray gun side in a roughly horizontal direction.

[0072] A valve core 43v is inserted in a manner to block the cylindrical hole 43b, and a flange portion 43f continuous with the valve core 43v slides in the large diameter hole 43c. In addition, the linkage control valve 43 also has a bypass hole 43e of a small diameter, which is parallel to the cylindrical hole 43b and connects the connecting hole 43a and the large diameter hole 43c. A through hole 43h is provided in a position of the flange portion 43f substantially adjacent to the valve core 43v in a manner parallel to the valve core 43v. The valve core 43v side of the through hole 43h is relatively large in diameter, and the opposite side is relatively small in diameter, and their transition portion is truncated into a cone shape.

[0073] When the air spraying of the air spray gun 10 is in the stopped state, the compressed air is not sprayed from the air spray gun 10, and therefore, Figure 4The air flow indicated by arrow B in (a) stops (the air from the air pipe 44 to the air spray gun 10 forms a closed air circuit). At this time, due to the compressed air supply force from the compressed air source, the air pushes the flange 43f toward Figure 4 The valve core 43v is pushed in the direction of arrow A in (a), but the bypass hole 43e is smaller, so the force is smaller. In addition, the weight of the valve core 43v also plays a role, so the flange portion 43f does not move in a manner that presses the air in the direction of arrow B, thereby maintaining the state of the valve core 43v blocking the connecting hole 43a.

[0074] On the other hand, if the air spray of the air spray gun 10 is in the working state, compressed air can be sprayed from the air spray gun 10, so that the air is directed to the Figure 4 The air moves in the direction of arrow B in (a). Due to the change in the motion state of the air, the air pushes the flange portion 43f toward Figure 4 Push in the direction of arrow A of (a) to become Figure 4 (b) state. Figure 4 In the state (b), the large diameter hole 43c and the connecting hole 43d are connected via the periphery of the flange portion 43f, and the air flowing in the direction of arrow A flows in the direction of arrow B. At this time, the position of the valve core 43v also moves, and the air flows in the connecting hole 43a in the direction of arrow C via the small diameter portion 43s set at the corresponding position of the valve core 43v.

[0075] After that, if the air spray of the air spray gun 10 returns to the stopped state again, the air flowing in the direction of arrow B suddenly loses its destination (exit), and the flow of the air in the direction of arrow B stops. In this state, the air is forced in the direction of arrow A, so the air on the valve core 43v side passes through the flange 43f little by little due to the effect of the through hole 43h with a diameter difference, and the flange 43f is pushed to Figure 4 Thus, the valve core 43v is restored to the state where the communicating hole 43a is blocked.

[0076] return Figure 3 The compressed air pipe 51 is connected to the vacuum device 20 via a pulse valve 52, a compressed air pipe 53, a T-joint 54 and a compressed air pipe 55. The pulse valve 52 is configured by providing a pneumatic valve 52c with a connection time adjustment regulator 52a for adjusting the connection time of the pulse waveform and a disconnection time adjustment regulator 52b for adjusting the disconnection time of the pulse waveform.

[0077] Furthermore, the T-joint 54 is also connected to a compressed air pipe 56 , which reaches a T-joint 59 via a check valve 57 and a compressed air pipe 58 .

[0078] Furthermore, the air spray gun 10 is provided with a hook portion 11 so as to be hung on a protrusion 3 f provided on the side surface of the housing 2 .

[0079] Next, the operation of the air suction device 1 according to the present embodiment as described above will be described.

[0080] When the air spray of the air spray gun 10 is in the stopped state, the compressed air is not sprayed from the air spray gun 10. Figure 4 As shown in (a) of FIG. 2 , the valve body 43 v is kept in a state of blocking the communication hole 43 a , and compressed air is not supplied to the vacuum device 20 .

[0081] The operator squeezes the operating switch 12 of the air spray gun 10, and the air spray of the air spray gun 10 is switched to the operating state. As a result, compressed air is sprayed from the air spray gun 10. Due to the change in the motion state of the compressed air accompanying this, the valve core 43v moves to Figure 4 The valve body 43 moves to the position shown in (b), and compressed air is supplied to the vacuum device 20 through the small diameter portion 43s of the valve body 43v.

[0082] That is, without complicating the routing of the electrical wiring, the compressed air can be supplied to the vacuum device 20 in conjunction with the operation of the working switch 12 (the switching operation from the stop state of the air injection to the working state) by using only the mechanical structure of the interlocking control valve 43.

[0083] After that, the operator returns the grip of the working switch 12 of the air spray gun 10 to a light grip, and the air spray of the air spray gun 10 is switched to a stopped state. As a result, the injection of compressed air from the air spray gun 10 is stopped. Due to the change in the motion state of the compressed air accompanying this, the valve core 43v moves to Figure 4 The position shown in (a) is returned, and the supply of compressed air to the vacuum device 20 is stopped.

[0084] That is, without complicating the routing of the electrical wiring, the supply of compressed air to the vacuum equipment 20 can be blocked in conjunction with the operation of the working switch 12 (the switching operation from the working state of the air injection to the stopped state) by utilizing only the mechanical structure of the interlocking control valve 43.

[0085] The compressed air supplied from the interlocking control valve 43 to the compressed air pipe 51 is converted into pulsed compressed air by the pulse valve 52 and then supplied to the vacuum equipment 20 .

[0086] Thus, the vacuum device 20 performs the air suction action in a pulsed manner, but the air suction effect is not insufficient and the air consumption can be significantly reduced.

[0087] On the other hand, the pulsed compressed air generated by the pulse valve 52 merges with the non-pulsed compressed air supplied from the interlocking control valve 43 to the air spray gun 10 via the compressed air pipe 44 via the T-joint 54 and the T-joint 59 .

[0088] As a result, the amount of air sprayed from the air spray gun 10 changes in a pulsed manner, but the cleaning effect by the air spray does not become insufficient. On the other hand, the air consumption can be significantly reduced.

[0089] Furthermore, the amount of compressed air passing through the compressed air pipe 44 can be adjusted by the speed controller 47 , thereby adjusting the mixing ratio of the pulsed compressed air and the non-pulsed compressed air.

[0090] As described above, according to the air suction device 1 of the present embodiment, the linkage control valve 43 is linked to the operation of the working switch 12 of the air spray gun 10 to switch the supply and blocking of compressed air to the vacuum device 20 by utilizing the change in the motion state of the air toward the air spray gun 10, so there is no need to complicate the routing of the electric wiring. In addition, the vacuum device 20 is configured to suck air in a pulsed manner, so that the air consumption can be effectively reduced, and energy saving can be achieved.

[0091] In addition, in the air spray gun 10, the air injection amount is also changed in a pulse shape, thereby also being able to effectively reduce the air consumption and achieve energy saving.

[0092] then, Figure 5 It is a diagram of a compressed air supply system of an air suction device 101 according to a second embodiment of the present invention.

[0093] The air suction device 101 of the present embodiment further includes a blower 120 as a blowing mechanism, and the blower 120 is supported on a ceiling wall above the workbench and blows air downwardly toward the top of the workbench (at Figure 2 (also shown in the figure with a single-dot dash line).

[0094] In the present embodiment, a “1→3” type cross pipe (general term for a cross-shaped pipe socket) 154 is used instead of the “1→2” type T-joint 54 , and compressed air is supplied from the cross pipe 154 to the blower 120 via a compressed air pipe 155 .

[0095] The other structures of this embodiment are the same as those of the first embodiment described above, and therefore the same reference numerals are used and the description thereof is omitted.

[0096] According to the air suction device 101 of the present embodiment, the linkage control valve 43 is linked to the operation of the working switch 12 of the air spray gun 10 to switch the supply and blocking of compressed air to the vacuum device 20 and the blower 120 by utilizing the change in the motion state of the air toward the air spray gun 10, so there is no need to complicate the routing of the electrical wiring. In addition, the vacuum device 20 is configured to suck air in a pulsed manner, and the blower 120 is configured to blow air in a pulsed manner, so that the air consumption can be effectively reduced and energy saving can be achieved.

[0097] then, Figure 6 It is a diagram of a compressed air supply system of an air suction device 101 ′ according to a third embodiment of the present invention.

[0098] The air suction device 101' of this embodiment further includes a second vacuum device 120' as a second air suction mechanism. The second vacuum device 120' is supported on a ceiling wall above the workbench and sucks the air above the workbench upward (at Figure 2 (also shown in the figure with a single-dot dash line).

[0099] In this embodiment, a “1→3” type cross pipe (general name for a cross-shaped pipe seat) 154 is used instead of the “1→2” type T-joint 54 , and compressed air is supplied from the cross pipe 154 to the second vacuum device 120 ′ via a compressed air pipe 155 .

[0100] The other structures of this embodiment are the same as those of the above-mentioned first embodiment, and therefore the same reference numerals are used and the description thereof is omitted.

[0101] According to the air suction device 101 of the present embodiment, the linkage control valve 43 is linked to the operation of the working switch 12 of the air spray gun 10 to switch the supply and blocking of compressed air to the vacuum device 20 and the second vacuum device 120' by utilizing the change in the motion state of the air toward the air spray gun 10, so there is no need to complicate the routing of the electrical wiring. In addition, the vacuum device 20 and the second vacuum device 120' are configured to suck air in a pulsed manner, so that the air consumption can be effectively reduced and energy saving can be achieved.

[0102] then, Figure 7 It is a diagram of a compressed air supply system of an air suction device 201 according to a fourth embodiment of the present invention.

[0103] In this embodiment, an air spray gun is not provided, and a “1→2” type T-joint 254 is used instead of a “1→3” type cross pipe 154 , and compressed air is supplied from the T-joint 254 to the vacuum equipment 20 and the blower 120 via the compressed air pipe 55 and the compressed air pipe 155 .

[0104] In the present embodiment, no interlocking control valve is provided, and the compressed air pipe 51 is directly connected from the filter regulator 41 via the compressed air pipe 242 and the single slot valve 243 .

[0105] The other structures of this embodiment are the same as those of the second embodiment described above, and therefore the same reference numerals are used and the description thereof is omitted.

[0106] According to the air suction device 201 of this embodiment as well, the vacuum equipment 20 is configured to suck air in a pulsed manner, and the blower 120 is configured to blow air in a pulsed manner. Therefore, the air consumption can be effectively reduced, and energy saving can be achieved.

[0107] The air suction device 201 of this embodiment can be used in combination with any known air injection device. In addition, by adopting the single-slot valve 243, the operator can freely use both hands on the workbench.

[0108] then, Figure 8 It is a diagram of a compressed air supply system of an air suction device 201 ′ according to a fifth embodiment of the present invention.

[0109] In this embodiment, no air spray gun is provided, and a "1→2" type T-joint 254 is used instead of a "1→3" type cross pipe 154, and compressed air is supplied from the T-joint 254 to the vacuum equipment 20 and the second vacuum equipment 120' via the compressed air pipe 55 and the compressed air pipe 155.

[0110] In the present embodiment, no interlocking control valve is provided, and the compressed air pipe 51 is directly connected from the filter regulator 41 via the compressed air pipe 242 and the single slot valve 243 .

[0111] The other structures of this embodiment are the same as those of the third embodiment described above, and therefore the same reference numerals are used and the description thereof is omitted.

[0112] According to the air suction device 201 ′ of the present embodiment as well, the vacuum equipment 20 and the second vacuum equipment 120 ′ are configured to suck air in a pulsed manner, and therefore, air consumption can be effectively reduced, thereby achieving energy saving.

[0113] The air suction device 201' of this embodiment can be used in combination with any known air injection device. In addition, by adopting the single-slot valve 243, the operator can freely use both hands on the workbench.

[0114] then, Fig. 9 It is a diagram of a compressed air supply system of an air suction device 301 according to a sixth embodiment of the present invention.

[0115] The air suction device 301 of this embodiment is provided with a blower 120 and a blower 122 as a blowing mechanism, and the blower 120 and the blower 122 are arranged above the workbench and blow air downwardly to the upper part of the workbench. In addition, a smaller vacuum device 22 is provided as an air suction mechanism instead of the vacuum device 20. Compared with the blower 120, the blower 122 is smaller, and the flow rate of the air blown from the blower 120 (flow rate of about 390L / min) is greater than the flow rate of the air blown from the blower 122 (flow rate of about 180L / min).

[0116] The compressed air pipe 51 is connected to the blower 122 via the pulse valve 52, the compressed air pipe 53, the T-joint 154, the compressed air pipe 55, the T-joint 60, and the compressed air pipe 61. In addition, the compressed air pipe 51 is also connected to the vacuum device 22 via the pulse valve 52, the compressed air pipe 53, the T-joint 154, the compressed air pipe 55, the T-joint 60, and the compressed air pipe 62.

[0117] Fig. 9 Other structures and Figure 5 Since the present invention is similar to the second embodiment of the present invention, the same reference numerals are used and the description thereof is omitted.

[0118] In the air suction device 301 of the present embodiment, the linkage control valve 43 is linked to the operation of the working switch 12 of the air spray gun 10, and the change in the motion state of the air toward the air spray gun 10 is used to switch the supply and blocking of the compressed air to the vacuum device 22, the blower 120, and the blower 122, so there is no need to complicate the routing of the electrical wiring. In addition, the vacuum device 22 is configured to suck air in a pulsed manner, and the blower 120 and the blower 122 are configured to blow air in a pulsed manner, so that the air consumption can be effectively reduced, and energy saving can be achieved.

[0119] Here, Fig.10 2 is a schematic front view of the air suction device 301 of this embodiment. Fig.11 2 is a schematic side sectional view of the air suction device 301 of this embodiment. Fig.12 It is a top view of the net part 302m of the air suction device 301 of this embodiment.

[0120] like Figure 10 to Figure 12As shown, the air suction device 301 of this embodiment also has a rectangular parallelepiped housing 302. The upper surface of the housing 302 is funnel-shaped by a shallow inclined surface 302a, and on the other hand, it is flatly covered by a net 302m to form a flat workbench. The upper end of the vacuum device 22 as an air suction mechanism is connected to the lower side of the funnel-shaped inclined surface 302a. It is also possible that the net 302m is not provided, or the net 302m can be detachable in order to ensure a larger working space on the workbench.

[0121] See also Fig. 9 The vacuum device 22 uses compressed air supplied from the compressed air pipe 62 to suck the air above the workbench into the interior (below) of the workbench through the net 302m. A dust bag 27 can be installed at the lower end of the vacuum device 22, and a filter device not shown in the figure can also be connected.

[0122] return Fig.10 and Fig.11 The area above the workbench is surrounded by the left side wall 303a, the right side wall 303b, the front vertical wall 303c, the front inclined lower wall 303d, the front inclined upper wall 303g, the rear wall 303e and the top wall. Thus, it is easy to perform air spraying (cleaning) operations on the workbench to spray air on various parts, and on the other hand, it is prevented that the surrounding is polluted by the sprayed air.

[0123] In addition, in this embodiment, the upper edge of the front inclined lower wall 303d is folded back inward, and similarly, the lower edge of the front inclined upper wall 303g is also folded back inward (see Fig.11 ). As a result, the upper edge of the front inclined lower wall 303d becomes an air introduction guide edge with a U-shaped cross section, and the lower edge of the front inclined upper wall 303g also becomes an air introduction guide edge with a U-shaped cross section. Utilizing these air introduction guide edges with a U-shaped cross section, the introduction resistance of the air introduced (sucked) from the front side to the top of the workbench is reduced, so that the introduction of air is smooth. The diameter of R with a U-shaped cross section is preferably in the range of 2.0mm to 5.0mm, for example, 3.2mm. In addition, the inclination angle of the front inclined lower wall 303d and the front inclined upper wall 303g is preferably about 40° to 50°, for example, 45°. In addition, the length of the front inclined lower wall 303d and the front inclined upper wall 303g in the inclination direction is preferably 25mm to 40mm, for example, 33mm and 30mm respectively. In addition, the height of the front vertical wall 303c is 70mm.

[0124] Furthermore, a protrusion 303 f for hanging the hook 11 of the air spray gun 10 is provided on the side surface of the housing 302 .

[0125] And, if Fig.10 and Fig.11As shown, the blower 120 and the blower 122 are arranged along the front-to-back direction ( Fig.11 The left and right directions) are arranged on the rear side above the workbench ( Fig.11 The blower 120 is arranged at the rear side, and the blower 122 is arranged at the front side.

[0126] In addition, if Fig.11 As shown, the center axis of the air blown from the front blower 122 is farther from the center of the workbench (the center of the circular net 302m: refer to Fig.12 ) passes nearer.

[0127] Specifically, the central axis of the air blown from the rear blower 120 is at the rear of the center of the workbench ( Fig.11 The blower 120 is arranged so as to pass through a position about 3 cm to 6 cm to the right of the workbench, so that the central axis of the air blown from the front blower 122 is in front of the center of the workbench ( Fig.11 The blower 122 is arranged so as to pass through a position of about 0 cm to 3 cm (to the left of the object).

[0128] In this embodiment, the central axis of the air blown from the rear blower 120 is substantially parallel to the central axis of the air blown from the front blower 122, and forms an angle of 45° with respect to the vertical direction. The inclination angle is preferably about 40° to 50°.

[0129] According to the air suction device 301 of the present embodiment as described above, the air with a large flow rate blown from the rear blower 120 can be used to recover air from the entire workbench, and the air on the workbench can be further recovered from the front side of the workbench using the air blown from the front blower 122. According to various experiments conducted by the inventors of this case, by using the front and rear blowers 120 and 122, the air on the workbench can be recovered efficiently (with a smaller total flow rate).

[0130] In the air suction device 301 described above, the compressed air pipe 55 and the blower 122 can be directly connected to omit the T-joint 60, the compressed air pipe 62 and the vacuum device 22 (see Fig. 9). In this case, there is no air suction mechanism in the device, so the device is called an air blowing device 301. In addition, in this case, the dust bag 27 is directly installed on the lower side of the funnel-shaped inclined surface 302a. In addition, the space between the funnel-shaped inclined surface 302a and the net 302m is equivalent to an air passage path that allows air above the workbench to pass. Alternatively, in this case, the funnel-shaped inclined surface 302a may not be provided, so that the cylindrical space functions as an air passage path.

[0131] In addition, at least at the time of the present application, the form in which the pulse valve 52 is removed from the air suction device 301 described above (having a front and rear two-stage blower 120, 122) (a form in which air is not sucked and / or blown in a pulsed manner) and the form in which the speed controller 47 is removed are also the objects of protection of the present application. Fig.13 Such an embodiment is referred to as the seventh embodiment.

[0132] exist Fig.13 In the air suction device (air blowing device) 401 of the seventh embodiment shown, the compressed air pipe 51 is connected to the compressed air pipe 155 and the compressed air pipe 64 via a T-shaped joint 63, the compressed air pipe 155 is connected to the blower 120, and the compressed air pipe 64 is connected to the T-shaped joint 60.

[0133] According to the air suction device 401 of this embodiment, the air with a large flow rate blown from the rear blower 120 can be used to recover air from the entire workbench, and the air on the workbench can be recovered from the area in front of the workbench by using the air blown from the front blower 122. By using the blowers 120 and 122 in the front and rear stages, the air on the workbench can be recovered efficiently (with a smaller total flow rate).

[0134] Furthermore, at least at the time of filing this application, the form in which the interlocking control valve 43 is removed from the air suction device 401 (having front and rear two-stage blowers 120, 122) described above and a single-slot valve 243 is provided is also the object of protection of this application. Fig.14 Such an embodiment is referred to as the eighth embodiment.

[0135] exist Fig.14In the air suction device (air blowing device) 501 of the eighth embodiment shown, the compressed air pipe 42 is connected to the compressed air pipe 44 and the compressed air pipe 71 via the T-joint 70, the compressed air pipe 44 is connected to the air spray gun 10, and the compressed air pipe 71 is connected to one end of the single slot valve 243. In addition, the compressed air pipe 72 connected to the other end of the single slot valve 243 is connected to the compressed air pipe 74 and the compressed air pipe 75 via the T-joint 73, the compressed air pipe 74 is connected to the vacuum device 22, and the compressed air pipe 75 is connected to the Y-shaped pipe joint 76. In addition, the Y-shaped pipe joint 76 is connected to the blower 122 via the compressed air pipe 77, and is connected to the blower 120 via the compressed air pipe 78.

[0136] According to the air suction device 501 of this embodiment, the air with a large flow rate blown from the rear blower 120 can be used to recover air from the entire workbench, and the air on the workbench can be recovered from the area in front of the workbench by using the air blown from the front blower 122. By using the blowers 120 and 122 in the front and rear stages, the air on the workbench can be recovered efficiently (with a smaller total flow rate).

[0137] exist Fig.14 In the air suction device (air blowing device) 501 of the eighth embodiment shown, the single groove valve 243 can be replaced with a bottom valve 343. Fig.15 Such an embodiment is represented as the ninth embodiment.

[0138] Fig.15 Other structures and Fig.14 The present invention is similar to the eighth embodiment, and therefore, the same reference numerals are used and description thereof is omitted.

[0139] According to the air suction device 601 of this embodiment, the air with a large flow rate blown from the rear blower 120 can be used to recover air from the entire workbench, and the air on the workbench can be further recovered from the front side of the workbench using the air blown from the front blower 122. By using the front and rear blowers 120 and 122, the air on the workbench can be recovered efficiently (with a smaller total flow rate).

[0140] In addition, it is also possible to use Fig. 9 The dotted line portion (the portion of the interlocking control valve 43) of the sixth embodiment shown in FIG. Fig.14 The dotted line portion (the portion of the single slot valve 243) of the eighth embodiment shown in the figure or Fig.15 In these embodiments, air is sucked and / or blown in a pulsed manner, but linkage control with the air spray gun 10 is not implemented.

[0141] In addition, Figures 9 to 12 In the device of the sixth embodiment shown, as described above, the compressed air pipe 55 can be directly connected to the blower 122, and the T-joint 60, the compressed air pipe 62 and the vacuum device 22 can be omitted. In this case, there is no air suction mechanism in the device, so the device is called an air blowing device.

[0142] then, Fig.16 It is a diagram of a compressed air supply system of an air blowing device 301 ′ according to a tenth embodiment of the present invention.

[0143] The air blowing device 301' of this embodiment is equipped with a blower 120, a blower 122a and a blower 122b as a blowing mechanism, and the blower 120, the blower 122a and the blower 122b are arranged above the workbench and blow air downward to the top of the workbench. On the other hand, no air suction mechanism is provided. Compared with the blower 120, the blower 122a and the blower 122b are small, and the flow rate of air blown from the blower 120 (flow rate of about 390L / min) is greater than the flow rate of air blown from the blower 122a and the blower 122b (flow rate of about 180L / min).

[0144] A compressed air supply system diagram of the air blowing device 301' of the tenth embodiment (see Fig.16 ) is equivalent to the air suction device 301 of the sixth embodiment (refer to Fig. 9 )'s blower 122 and vacuum device 22 are replaced with blower 122a and blower 122b.

[0145] Fig.16 Other structures and Fig. 9 Since the sixth embodiment is the same as that of the present invention, the same reference numerals are used and the description thereof is omitted.

[0146] In the air blowing device 301' of the present embodiment, the linkage control valve 43 is linked to the operation of the working switch 12 of the air spray gun 10, and the change in the motion state of the air toward the air spray gun 10 is used to switch the supply and blocking of the compressed air to the blower 120, the blower 122a, and the blower 122b, so there is no need to complicate the routing of the electric wiring. In addition, the blower 120, the blower 122a, and the blower 122b are configured to blow air in a pulsed state, so that the air consumption can be effectively reduced, and energy saving can be achieved.

[0147] Here, Fig.17 is a schematic front view of the air blowing device 301' of this embodiment. Fig.18 is a schematic side sectional view of the air blowing device 301' of this embodiment. Fig.19It is a top view of the web portion 302m' of the air blowing device 301' of the present embodiment.

[0148] like Figure 17 to Figure 19 As shown, the air blowing device 301' of this embodiment also includes a rectangular parallelepiped housing 302'. The upper surface of the housing 302' is flatly covered with a net 302m' to form a flat workbench. A cylindrical air passage is provided below the net 302m'.

[0149] The area above the workbench is surrounded by the left side wall 303a', the right side wall 303b', the front vertical wall 303c', the front inclined lower wall 303d', the front inclined upper wall 303g', the rear wall 303e' and the top wall. Thus, the air spraying (cleaning) operation of spraying air to various parts is easy to perform on the workbench, and on the other hand, the surrounding area is prevented from being polluted by the sprayed air.

[0150] In this embodiment, the upper edge of the front inclined lower wall 303d' is folded back inwards, and similarly, the lower edge of the front inclined upper wall 303g' is preferably folded back inwards (see Fig.18 ). In this case, the upper edge of the front inclined lower wall 303d' becomes an air introduction guide edge with a U-shaped cross section, and the lower edge of the front inclined upper wall 303g' also becomes an air introduction guide edge with a U-shaped cross section. By using these air introduction guide edges with a U-shaped cross section, the introduction resistance of the air introduced (sucked) from the front side to the top of the workbench is reduced, so that the introduction of air is smooth. The diameter of R with a U-shaped cross section is preferably in the range of 2.0mm to 5.0mm, for example, 3.2mm. In addition, the inclination angle of the front inclined lower wall 303d' and the front inclined upper wall 303g' is preferably about 40° to 50°, for example, 45°. In addition, the length of the inclination direction of the front inclined lower wall 303d' and the front inclined upper wall 303g' is preferably 25mm to 40mm, for example, 33mm and 30mm respectively. In addition, the height of the front vertical wall 303c' is 70mm.

[0151] Furthermore, a protrusion 303f' for hanging the hook 11 of the air spray gun 10 is provided on the side surface of the housing 302'.

[0152] And, if Fig.17 and Fig.18 As shown, on the upper rear side of the workbench ( Fig.18 ), the two smaller blowers 122a, 122b are arranged at positions that are symmetrical when viewed from the front and overlap with each other when viewed from the side, and the larger blower 120 is arranged in the middle of the two blowers 122a, 122b when viewed from the front and at the rear side when viewed from the side.

[0153] Each blower 120, 122a, 122b blows air toward the workbench in a forward and downward tilted manner when viewed from the side. When viewed from the side, the center axis of the air blown from the front blowers 122a, 122b is farther from the center of the workbench (center of the circular net 302m': refer to Fig.19 ) passes closer.

[0154] Specifically, when viewed from the side, the central axis of the air blown by the blower 120 from the rear (rear position) is at the rear of the center of the workbench ( Fig.18 The blower 120 is arranged so as to pass through a position of about 3 cm to 6 cm to the right of the workbench, so that the central axis of the air blown from the blowers 122a and 122b in the front (front position) is in front of the center of the workbench ( Fig.18 The blowers 122a and 122b are arranged so as to pass through a position of about 0 cm to 3 cm (to the left of the image).

[0155] In addition, in this embodiment, the central axis of the air blown from the rear (rear stage position) blower 120 and the central axis of the air blown from the front (front stage position) blower 122a, 122b are roughly parallel in side view and form 60 degrees with the vertical direction. The inclination angle is preferably about 50° to 70°.

[0156] On the other hand, in the main view, if Fig.17 As shown, the central axis of the air blown from the rear (rear position) blower 120 is in the vertical direction, while the central axis of the air blown from the front (front position) blower 122a, 122b is inclined 10° relative to the vertical direction. The inclination angle is preferably about 5° to 20°.

[0157] According to the above-mentioned air blowing device 301' of this embodiment, the air with a large flow rate blown from the blower 120 at the rear (rear stage position) can be used to recover the air from the entire workbench, and for the area in front of the workbench, the air blown from the blowers 122a and 122b at the front (front stage position) can be further used to recover the air on the workbench. According to various experiments conducted by the inventor of this case, by using the three blowers 120, 122a, and 122b at the front and rear stages, the air on the workbench can be efficiently recovered (with a smaller total flow rate).

[0158] In addition, at least at the time of the present application, the form obtained by removing the pulse valve 52 from the blowing device 301' (having three blowers 120, 122a, 122b in two front and rear sections) described above (a form in which air is not blown in a pulsed state) and the form obtained by removing the speed controller 47 are also the objects of protection of the present application.

Claims

1. A blowing device, characterized in that: The blowing device has: An air passage, which is provided inside the workbench and allows air above the workbench to pass through; Two or more blowing mechanisms, which are arranged on the upper rear side of the workbench in a side view, and respectively blow air toward the workbench in a forward and downward slanting manner in a side view; as well as The air spray gun has a working switch for switching the working state and the stopping state of the air spray. The two or more blowing mechanisms are arranged at any of the front and rear positions arranged along the front-rear direction when viewed from the side. When viewed from the side, the center axis of the air blown from the blowing mechanism disposed at the front position passes through a position closer to the center of the workbench than the center axis of the air blown from the blowing mechanism disposed at the rear position, and the center axes of the air blown from the two or more blowing mechanisms are inclined at an inclination angle of 50° to 70° relative to the vertical direction. The flow rate of air blown from the blowing mechanism disposed at the rear position is greater than the flow rate of air blown from the blowing mechanism disposed at the front position. The air passage has a funnel-shaped inclined surface or a cylindrical space and an air suction mechanism provided on the lower side of the inclined surface or the space. The central axis of the air blown from the two or more blowing mechanisms passes through a portion of the air passage inside the workbench, and the air blown from the two or more blowing mechanisms is recovered via the air passage.

2. The blowing device according to claim 1, characterized in that: The top of the workbench is surrounded by a left wall, a right wall, a rear wall and a top wall. A front inclined lower wall and a front inclined upper wall are provided on the front side above the workbench. The upper edge of the front inclined lower wall is formed into an air introduction guide edge having a U-shaped cross section. The lower end edge of the front inclined upper wall also serves as an air introduction guide edge having a U-shaped cross section.

3. The blowing device according to claim 1 or 2, characterized in that: The air blowing device also has an interlocking control valve, which is linked to the switching operation of the working state and the stop state of the air spray of the air spray gun performed on the working switch, and utilizes the change of the movement state of the air toward the air spray gun to switch the working state and the stop state of the more than two blowing mechanisms.

4. The blowing device according to claim 1 or 2, characterized in that: One or both of the two or more blowing mechanisms are configured to blow air in a pulsed manner when the two or more blowing mechanisms are in an operating state.

5. The blowing device according to claim 1 or 2, characterized in that: The air suction mechanism is configured to suck air in a pulsed manner when the air suction mechanism is in an operating state.

6. A blowing device, characterized in that: The blowing device has: An air passage, which is provided inside the workbench and allows air above the workbench to pass through; Two or more blowing mechanisms, which are arranged on the upper rear side of the workbench when viewed from the side, and respectively blow air toward the workbench in a forward and downward slanting manner when viewed from the side; as well as The air spray gun has a working switch for switching the working state and the stopping state of the air spray. The two or more blowing mechanisms are arranged at any of the front and rear positions arranged along the front-rear direction when viewed from the side. When viewed from the side, the center axis of the air blown from the blowing mechanism disposed at the front position passes through a position closer to the center of the workbench than the center axis of the air blown from the blowing mechanism disposed at the rear position, and the center axes of the air blown from the two or more blowing mechanisms are inclined at an inclination angle of 50° to 70° relative to the vertical direction. In the front view, the central axis of the air blown from the blowing mechanism arranged at the rear stage is in the vertical direction, and the central axis of the air blown from the blowing mechanism arranged at the front stage is inclined at an angle of 5° to 20° relative to the vertical direction. The flow rate of air blown from the blowing mechanism disposed at the rear position is greater than the flow rate of air blown from the blowing mechanism disposed at the front position. The air passage has a funnel-shaped inclined surface or a cylindrical space and an air suction mechanism provided on the lower side of the inclined surface or the space. The central axis of the air blown from the two or more blowing mechanisms passes through a portion of the air passage inside the workbench, and the air blown from the two or more blowing mechanisms is recovered via the air passage.

7. The blowing device according to claim 6, characterized in that: The air blowing device also has an interlocking control valve, which is linked to the switching operation of the working state and the stop state of the air spray of the air spray gun performed on the working switch, and utilizes the change of the movement state of the air toward the air spray gun to switch the working state and the stop state of the more than two blowing mechanisms.

Images