TWI373306B - - Google Patents

Description

1373306 VI. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to a combine harvester. Conventionally, a harvesting device is provided on the front side of the vehicle having the traveling device f. The operating portion, the threshing device, and the granule groove are provided on the upper side of the platform, and the bottom of the grain groove is provided with a dam in the grain groove. The delivery device that delivers the pellets to the lower conveyor is provided with a blower on the inlet side of the transport cylinder, and a combine harvester for the discharge drum for guiding the discharge of the pellets on the outlet side of the transport cylinder. This combined harvester is mainly made by Wei Chengtian #, and the micro-synthesis is applied to the larger grain size of soybeans, etc., and 'the place where the harvested grain is discharged in a spiral by the wind." @f If the surface of the granules σ > granules is scratched, the commercial value of the granules of the granules can be increased. k < In addition, the following patent document 1 of the combined harvester from the air supply device to the transfer cylinder side is disclosed The wind from the air supply device is guided to the transport cylinder ★ The technique of guiding the wind from the set wind to the air supply outer phase and switching from the air supply device. The second state is the wind in the first state. Move #以,., 山榖叔出出,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, In the case of the air blower, the air blower can be used to remove the 1733306 barrage and the like which are attached to the body. [Patent Document 1] JP-A-2002-65047 SUMMARY OF INVENTION Technical Problem However, the problem is to be solved. Valve switched to second shape In this case, the wind from the air supply device is not guided to the transfer cylinder. Therefore, if the feed device is driven and the grain in the tank is sent out to the transfer cylinder, the grain in the transfer cylinder is clogged, and not only cannot be carried out. The granule discharge operation cannot be carried out by the combine harvester itself. In addition, the shovel operation is, for example, the slanting of the combine harvester, ::= Γ can move to the lower side due to its own weight, so the work: in the joint The cleaning operation is carried out in the vicinity of the harvester. The technical means for solving the problem is as follows: The invention is based on the above-mentioned technical means for solving the above problems. a combine harvester having a harvesting device (3) on the front side of the platform (1) having the marking device (7), a longitudinal portion (4) and a threshing device (5) and a grain trough (6). (9) The delivery device (29), the second: the valley... the delivery cylinder is provided with the reverse side of the Jinzhou delivery cylinder (35): η = (37), from the air supply device (37) to the delivery valve (68) for guiding the wind from the air supply device (9): 4() The state of 1 is switched between the wind guide 5 from the air blowing device (37) and the second state on the side of the discharge port (7〇) which is open to the outside of the wind! The outer diameter of the transport cylinder (35) The discharge cylinder (88) for guiding the grain discharge guide is provided on the side, and is characterized in that: a switching position detecting device (82) for detecting a switching position of the switching valve (68) is provided, and the control device is called When the switching position detecting means (82) detects that the switching valve (68) is switched to the first state, (4) operates the air blowing device (37) to start the air blowing device (37) and sends (4) (4) When the (4) position detecting device (10) detects that the switching valve _ is switched to the second state, the air blowing I (37) is started, the wind I is set (37), and the sending device (29) is stopped. maintain. Item 2. The invention of the present invention is the combine harvester of claim i, and the second control unit (4) is provided with a parking brake pedal (26) for maintaining the traveling device (7) in a stopped state. When the parking coach is out, the board (10) is depressed to the position detecting device (27) for stopping the parking of the parking wheel, and the switching valve (10) is switched to the switching position detecting device (10). In the second state, the air supply Ϊΐ (4) operation is performed, and the position detecting device is pressed by the parking brake. 2 When the parking brake pedal (10) is stepped to the input driving position of the parking brake, the air blowing device is still being used ( 37) The stop state is maintained. Advantageous Effects of Invention According to the invention described in the first aspect, the switching valve _ is switched to the first! In the case of "clearing, (4) loading and moving to the transport (5), the granules in the granule tank (6) are sent out to the transport cylinder (3 5) and discharged by the wind transport unit. As described above, since the front end of the glutinous wind power: =) is transported and discharged, it is less likely to cause scratches on the surface of the grain than when the snail [s] 丄 373306 is rotated, and the commercial value of the harvested granules can be improved. Switching the switching valve (68) to the second state and starting the operation of the air supply device (), the air blowing device (37) is started and the wind is ejected from the discharge port (70) opening to the outside of the air supply path, and the wind can be used for joint harvesting. The cleaning work of each part of the machine body. Further, at this time, since the feeding device (29) is not activated, the granules in the granule groove (6) are not sent out into the conveying cylinder (35), and the conveying cylinder that can transport the granules of the granules is no longer carried out ( 35) The inner grain does not block. Thereby, the state of being convertible into the granule discharge operation can be maintained, and the work efficiency of the combine harvester can be improved. [Embodiment] Hereinafter, embodiments of the present invention will be described based on the drawings. As shown in Fig. 1 and Fig. 2, the combined harvester is provided with a traveling device 2 on the lower side of the platform 1 in which the top frame group is formed in a rectangular shape, and a harvesting device 3' on the front side of the platform 1 on the front side of the platform 1 The control unit 4 is provided on the right side, and the unloading device 5' is disposed on the left side of the rear portion of the vehicle platform 1 and the grain groove 6 is provided on the right side of the rear portion of the vehicle platform 1. The traveling device 2 is a driving sprocket 7 that drives the front end from a traveling task box (not shown), a plurality of rotating wheels 9 that are pivotally supported by the wheel frame 8, and a shaft that is supported by the rear end of the wheel frame 8. Most of the tensioning wheels are composed of a π-crawling track π. The harvesting device 3 is attached to a frame 12 having a dial-in drilling machine (not shown), and is provided with a grass body 13 for dividing the left and right sides of the grain stem, and the slider can be freely moved up and down. The dialing wheel 14, the cutting-in lever, the 1373306 cutter 15, and the transporting belt η which transports the harvested grain rod to the rear are formed. The rear end portion of the transport conveyor belt 16 is connected to the mast supply port of the threshing device 5. The operation unit 4 is provided with an operation #19 attached to an upper portion of the hood 18 that covers the engine 17 mounted on the vehicle platform 1. The operation seat is provided with a front side console 20' on the front side and a side portion on the left side of the operation seat 19. The structure of the operation panel 21. On the right side of the upper side of the front side console 2, the operation of the front and rear direction is adjusted to adjust the harvesting station 1, ιν &> j褒3 ’ to operate the body in the left and right direction

The rod 22 of the direction of travel. Further, a monitor 显示 for displaying work information such as a vehicle speed or a grain storage amount of the granule groove 6 is disposed on the upper side of the front side console 2, and an automatic control device is disposed on the inclined surface formed on the left side of the monitor 23. switch. In addition, the side operating panel 21 is provided with a shift lever for adjusting the driver and a trip lever (not shown) for starting the harvesting device 3 and the disengaging device 5, and the side speed setting of the side speed and the clutch lever is set to The remote control 24 for free loading and unloading of the granules. Further, the parking brake pedal 26 for the parking brake provided in the traveling task box is stepped on the left side of the step 25 below the control seat 9 . The base of the parking brake pedal % is provided with a switch 27 in a state where the parking brake pedal 26 is depressed to the parking brake operating position (the parking brake pedal position detecting device is described above) In the separation chamber, there is a spiral separation method for the stable front portion threshing process for feeding the transfer hopper 16 from the harvesting device 3 to the grain stem, and the shake chamber is selected in the lower W room. 1373306 As shown in Fig. 3 to Fig. 3, the grain trough 6 is a box-shaped container in which a bottom portion is formed into a funnel shape, and the grain is selected by a lifting device 28 by a lifting device. The central portion of the bottom of the grain ridge 6 is opened downward, and the opening is connected to the upper portion of the granule feeding device 29. am as shown in Fig. 4 to Fig. 7, the feeding device The inside of the delivery box 3 is provided with six pieces of delivery blades 33 that are rotationally driven by the electric motor through the transmission key 32. The upper part of the delivery box 3G corresponds to the mouth opening of the bottom of the groove 6 and has an adjustment from _ 6 side of the grain under the amount of grain 34 official addition, in The lower portion of the delivery box (9) is formed such that the transfer cylinder 35 that is formed to be longer than the door is comminuted. The bottom portion/P formed in the delivery box 30 communicates with the opening formed on the upper surface of the transport cylinder 35. Further, as shown in Fig. 7, the upper portion of the opening portion H is provided with the opening portion 30 so that the rotation axis of the delivery leaf 33 is sent out, and the falling side or the rising rotation bias of the blade 33 is borrowed. In this configuration, since the granules in the granules of the 卞^ 卞 ^ ^ ^ 流入 流入 形成 形成 形成 形成 形成 形成 形成 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 The electric motor 31 is thrown out. The retractable device is placed in the transfer cylinder 35, as shown in FIG. 1 to FIG. 3. When the transfer cylinder 35 is inserted, the end portion is connected to the air blower through the tubular body 36. ^Air supply port I as shown in Fig. 3 and Fig. 8 'This cooling cold g μ air supply device 37 is provided with one of the plurality of crotch fins 39 on the outside, and the side case bursts π ^ 0 internally provided by the drive shaft 41 The support is a freely rotatable circular rotation of the persuasion turntable 42. Along the circumference of the rotary disk 42 The drive shaft 41 < axial direction cross-sectional shape is formed as a circle-shaped recessed portion 1373306, and is provided with the partitioning portion 43 spaced apart in the circumferential direction by a predetermined interval. The partitioning plate 43 is at the axial center along the driving shaft Directional cross-section: The shape is formed in a semi-circular shape. Further, the front side: the moxibustion side box 44 is formed with a concave portion that is opposite to the circumference of the rotation ... and the concave portion is circumferentially < z private · 6 inhaled outside the air to blow out the air outlet I in addition, in order to join the front side box 4 〇 and the rear side 44 will be along the circumference of the rotating disc 42, the a A door margin 4 set the recess and the rear side box 44 (four) to the configuration. With this configuration, the driving force of the engine 17 is rotated by the input pulley 51 fixed to the end portion of the movable shaft 41, and the rotary disk 42 is rotated: 曰 the outer air port is sucked from the air inlet 45 by the winding of the partition plate 43. 40 squirts. ^: The wind is as shown in Fig. 3. The wheel of the bevel gear box 52 fixed on the car a U 疋 on the early D 1 is fixed by 53. The output pulley 54 is attached to the output pulley. The tension transmission belt 55. The bevel gear box 5^22 is interlocked by the two bevel gears in the bevel gear case 52: the wheel-out shaft 53 is changed in a posture of 90 degrees in a plan view, and is disposed in the left-right direction of the body. Further, the wheel shaft 57 projecting outward from the engine 17 is fixedly outputted between the output pulley 58 and the end portion fixed to the input shaft %: the input pulley 59, and the drive belt 6 is wound in a slow state. Here: the upper side of the belt 60 is configured such that the transmission belt 6 is tensioned to convey the driving force of the engine from the output: the rim to the input pulley 59. The tension roller 61 is pivoted on the side of the platform i The support is freely rotatable up and down on the free end side of the two tension arms 62, and is configured to move up and down by the action of the electric motor fixed to the side of the vehicle i. Thereby, the discharge clutch is constructed, [玄] 9 1373306 by When the electric motor 63 is actuated and lowered, the drive belt (10) is strained by the tension roller 61, The rotary disk 4 of the air blowing device 37 rotates by the driving force of the engine 17, and the wind is ejected from the air blowing port 46. Note that the figure is omitted, but the rotation position of the tension arm 62 or the operation stop position of the electric horse 63 is set. The discharge clutch "discharges the person: the operation detection sensor 96, and the discharge detection clutch 96 detects the discharge clutch stop detection sensor 97. In addition, as shown in FIG. 8, the integrated connection is provided here. The suction cylinder 47 of the air inlet 45 air supply port 46 and the attachment member 49 of the air supply cylinder 48 are locked and fixed to the rear side of the side box 44 behind the air blowing device 37 by bolts 5. The air cylinder 48 is connected to the transport cylinder 35. As shown in Fig. 9, the upper surface of the blower cylinder 48 is cut away to form an open portion 65 having a rectangular shape in plan view, and a lock plate 66 having an arc-shaped cross section covering the open portion 65 from the upper side is welded and fixed. Further, the lock is cut off. The central portion of the plate 66 is formed with an open portion 67 having a rectangular shape in plan view. Further, as shown in Fig. 8, a valve block 69 having a switching valve 68 is welded and fixed to cover the open portion 67 from the upper side. Fig. 8, Fig. 1, Fig. As shown, the upper part of the valve block 69 is formed through The opening portion 65 and the opening portion 67 communicate with the discharge port 70 inside the blower cylinder 48. Further, the discharge cylinder 71 that communicates with the discharge port 7 is protruded upward from the upper surface of the valve block 69. As shown in the figure, the flexible tube 83 is connected to the discharge tube, and the tube 83 is wound and stored in the card holder 84 provided in the space below the grain tank 6. During the cleaning operation, the pull is performed. The hose 83 can be used. Further, the valve block 69 is formed in the left-right direction through the valve block 69 and is connected to the inside of the air supply cylinder 48 and is sprayed through the through hole 72. Further, the :: shaft 74 is freely rotatably inserted, and the through hole 73 of the valve shaft 74 is changed to the base of the operating lever 75. The basis. The Ρ fixed cutting structure is as shown in FIG. 13 , and the slewing operation is performed on the side of the switching discharge operation position to be the traverse of the intermediate shaft 74 : after the inside of the grain transport cylinder 48 or the discharge port 7 〇 is connected It does not stop with the spurt of the outside wind. On the other hand, as shown in FIG. 14 , the operation lever 75 is moved to the cleaning position (4) (4) (4), and the feeding portion is connected to the discharge port 7 through the through hole 73 of the boring shaft 74; The wind is ejected from the main discharge chamber 7" In addition, as shown in FIG. 13 and FIG. 14, the peripheral shaft 7 is locked to the circumferential guide plate 76 of the wind direction guide plate 76 by the cross section of the inner surface of the lock body. In the tangential direction of the installation, in addition, as shown in (4) in the state in which the valve shaft 7 4 is discharged to the grain, #菲··里', the wind direction of the wind direction guide plate 6 is retracted in the state of the swirling operation. Contact the state of the second. In this state, since the thickness of the wind direction guide plate 76 is thin, the wind direction guide plate 76 is housed in the air supply cylinder: the portion 65 and does not protrude into the air supply cylinder 48, and does not become in the air supply cylinder\8. Resistance to the flow of the wind. Thereby, the air supply efficiency in the air supply cylinder 48 is improved. In the state where the steering shaft 74 is moved to the cleaning operation position: the wind direction guide plate 76 is swung in the upright direction to invade the air supply. In the cylinder 48, the wind direction guide plate 76 guides the wind of the blower cylinder (4) toward the discharge cylinder side. In addition, Jiang: meter. +. M w + (four) a u and the wind direction guide plate 76 are collectively referred to as a switching space 66. In addition, a 0 a ^ under ... in the state of the sweeping operation position, the state of the wind direction guides the extension % and τ ~ into one. Blocks the air supply path in the air duct 48 to leave a slight gap The composition of the M ^ ^ 屮饩 7 丨 1] gap. Thereby, the wind discharged from the discharge request 71 is weakened to an air volume suitable for the cleaning operation. As shown in Fig. 1 to Fig. 12, the upper part of the outer side of the valve block 69, h, and the lock of the king's lock are fixed, and the position of the operating lever and the cleaning are turned off to stop the grain discharge operation. The cross-section is an inverted L-shaped switching operation guide plate. Further, the micro-switch 80' is fixed to the side of the mounting member 49 or the blower cylinder 48 so as to be fixed to the base plate of the switching lever 75 by n = 1:1" 〇〇Ν or 〇 FF. That is, the switching operation lever 75 4 is discharged from the working position of the grain discharge operation (9) (10), and the switching room 68 is detected to switch and move to make the micro opening, „ , s + Η 冯 von von grain discharge operation state (i-th state). On the other hand, after the switching operation lever 75 is rotated to the cleaning operation position: the rotation of the cam plate 81 causes the micro switch 80 0N, and the detection switching valve 68 is switched to the cleaning operation state (the second position, the cam (four) is collectively referred to as switching. Position inspection: device ^ (4) off 8 〇 and in addition, the rear side of the grain trough 6 is erected by the electric motor ι〇4 and can be freely swayed by the vertical axis. The upper end portion (4) of the valley support cylinder 85 is connected to the base portion of the support cylinder 86 by the oil 87. Further, the discharge side of the front discharge member is disposed on the side of the discharge cylinder 88 having the exchangeability. The discharge cylinder 88 is supported by the support tray 85 for the YANG YANG and the support for the discharge 胄: The front end is supported. The state of the discharge operation is not performed in the (four) center* to the discharge 仃 拉 ) ) 12 12 1373306 The support member 89, which is positioned on the side of the disengaging device 5, supports the intermediate portion of the barrel 86. Supporting the discharge is also shown in Fig. 1, and #_ φ < in the granule tank 6 is provided in the cleaning switch 91 operated during the cleaning operation. The switching operation is disposed below the cleaning switch 91 in the space below the grain tank 6. Further, the operating unit 4 is provided with an electric motor 63 that is actuated by the remote control 24° 64 and discharged from the control driving and discharging device. Control device 92 for starting and stopping motor 31. Electric control As shown in Fig. 15, this control device sets the cleaning switch 91 and the micro switch 8. And the switch 27 J: the dynamic detection sensor 96, the discharge clutch stop detection function as the engine key switch 94, the detection guide f motion sensor... the discharge support cylinder 86 is detected to support the structure, and the state of rotation The storage detection switch 102 is housed. In addition, the unit motor 1G that controls the connection of the electric motor 63, the electric motor 31, the monitor, the sensation engine 17, the opening and closing adjustment engine 17, the electric current motor (10), the oil... It is also set to discharge...;:::2: The lifting and lowering switch for the lifting and supporting support cylinder 86 is discharged (the automatic branching of the discharge operation position is automatically rotated back to the discharge operation position (not shown), and the support cylinder for discharge is made 86: The automatic storage switch (not shown) from the discharge of the work position switch to the support member 89 and the automatic stop switch for stopping the automatic rotation of the support cylinder 86 by 2 [S] 13 1373306 (the illustration is omitted from the above) 'When the switching lever 75 is switched to the = grain=change to the micro switch 8, the battery is discharged (4). After the second is known, the controller 93 outputs the electric motor 63, and the electric starting and discharging clutch 64 are connected. Then, the air blower 37 starts the wind blown from the air blowing port 38 to pass through the switching valve 68 to the transport cylinder. After the set time elapses after the start ===, the controller % electric motor 31 outputs 'this electric motor 31 is started and Delivery device 29 starts ' The grain in the grain tank 6 is sent out to the conveyance cylinder 35. The granules sent out here are conveyed by the air sent to this conveyance cylinder 35, and are conveyed in the discharge 88 from the front end of this row (four) 88 to the exterior row b As described above, it is conveyed and discharged by the grain wind, so that it is less likely to cause scratches on the surface of the grain than in the case of spiral conveyance, and the product value of the harvested grain can be improved. 27 〇N> / month unloading position switching After the operation of the micro switch 8〇〇n ^sweeping, the controller 93 goes to the electric motor: the lower transfer motor Ο starts and the discharge clutch Μ is connected. Thereby, the feed 7 is started, and the wind blown from the air supply port 38 is from The discharge cylinder 71 is ejected, and the combined harvesting is performed by the wind ejected from the front end of the soft official 83. The cleaning is performed. In addition, at this time, the control is maintained from the control state of the electric motor. The inside of the tank 6 is sent out to the transfer cylinder 35, and the grain is not clogged in the movement of the grain that can be transported no longer. In this way, the state of the transferable and granule discharge operation can be maintained. Machine operation efficiency., '.·'

Cs) 14 ^73306 In addition, 'the brake pedal 26 is OFF when the vehicle is not depressed, so even if t & , w is switched on the switch 27 冉 (10), the lever 75 is switched to the cleaning and the sweat is turned off. When the cleaning is performed from 93 to the electric motor 63, the #:, starting from the controller, the discharge clutch 64 is not connected to the electric motor 63, and the wind is not stopped from the Z device 37 of the hose 83. The cleaning operation can be carried out directly, and the safety of the work can be improved. The knowledge of the cleaning is also known. In addition, before the engine 17 is started, the position of the sweeping operation is switched, and the micro switch 80 ON is changed to the clear (4) slave control. The device 93 goes to the unit, up to down, even if the operation of the key switch does not start. Therefore, if the cutting is not performed, the engine-: engine is started, so that the switching operation 2 == is caused in the transport cylinder 35. In the state of the state in which the storage support is supported by the support member 89 by the storage detection switch 1〇2, even if the storage is performed,

: 〇 ON operation, from controller 93 to electric motor. The output is also different. I: The clutch 64 will not be connected. On the other hand, in this state, if the operation is performed, the output from the controller 93 to the output/discharge clutch 64 of the electric motor 63 is connected. In addition, if the cleaning switch 91〇N is operated, the control is throttled from the front. 3 Output 4:: = : The slave rotation speed is automatically increased to the rotation speed suitable for the pellet discharge operation. However, in the case where the cleaning switch _(10) is operated, it is increased from the controller core section 15 1537330. The flow adjustment amount of the motor 103 is increased rapidly, and the rotation speed of the engine 17 is not smoothly increased. It can prevent the hose 83 from sweeping. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a side view of a combine harvester. Figure 2 is a top plan view of the combine harvester. Fig. 3 is a plan view showing the essential part of the see-through groove. Figure 4 is a front view of the delivery device. Figure 5 is a rear view of the delivery device. Figure 6 is a cross-sectional view of the delivery device. Figure 7 is a cross-sectional view of the delivery device. Fig. 8 is a rear view showing the relationship between the air blowing device and the switching valve. Fig. 9 is an explanatory view showing the upper half of the blower cylinder in a cross section. Fig. 10 is a rear view showing the description of the switching valve in the state in which the grain is discharged and the rear view 7 11 is a wide switching in the cleaning state. Fig. 12 is a side view for explaining the periphery of the switching valve. Fig. 1 3 i Sn: A side view for explaining the operation state of the granules. Fig. 14 is a side elevational view showing the state of the cleaning operation. Figure 15 is a block circuit diagram. [Main component symbol description] 1373306

2 Traveling device 3 Harvesting device 4 Control unit 5 Disengaging device 6 Grain trough 26 Parking brake pedal 27 Parking brake depression position detecting device 29 Delivery device 35 Transfer cylinder 37 Air supply device 68 Switching valve 70 Discharge port 82 Switching position detection Device 88 discharge cylinder 92 control device

[s ] 17

Claims (1)

1373306 VII. Patent application scope: 1. A combine harvester is provided with a harvesting device (3) on the front side of the platform (1) equipped with the traveling device (2), and a manipulating portion (4) and a threshing device (7) on the upper side of the platform (1). And the granule tank (6), at the bottom of the grain tank (6), a delivery device (10) that sends the grain in the grain tank (6) downward to the transfer cylinder (35) is provided in the transfer cylinder (35) The air blowing device (π) is provided on the side of the person, and the switching space (68) is provided on the air blowing path from the air blowing device (9) to the transporting side, and the wind from the air blowing device (37) is guided to the transporting cylinder ( The first state in the Μ) is switched between the second state in which the wind from the air blowing device (37) is guided to the side of the discharge port (70) which is opened to the outside of the air blowing path, and the valley is provided on the outlet side of the conveying cylinder. a discharge cylinder (88) for guiding the grain discharge, characterized in that: (4) a switching position detecting device (10)' for switching the switching position of the switching port (10) and a control device (92) for checking at the switching position When the device (82) detects that the switching valve (6) is switched to the first state, the air blowing device (37) is activated. The operation of the air blowing device (37) is started and the feeding device (10) is also & 1 & when the switching position detecting device (82) detects that the switching valve (68) is switched to the second state, the air blowing device (37) is performed. The start (9) is started and the stop state of the delivery device (4) is maintained. Send eight sets 2, such as the scope of patent application! In the combined harvester, the vertical section (4) is provided with the material (7) for stopping (4), and the stepping operation is performed; the parking brake pedal (26) is detected and the detecting device (27) is set, that is: the parking brake is set. Step-down switching (4) U The above-described switching position detecting means (82) detects that the cutting (4) (10) is switched to the second state τ to perform the starting operation of 1373306, and the parking position detecting means (27) does not detect the parking by the parking brake. When the brake pedal (26) is stepped to the input actuation position of the parking brake, the stopped state of the air blowing device (37) is maintained. Eight, schema: (such as the next page) [S 19