JP3964955B2 - Air flow switching device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a blower switching device suitable for use in a riding management machine or the like for spraying chemicals, fertilizers, etc. on paddy fields and field crops, for example.
[0002]
[Prior art]
Conventionally, a riding management machine has been used as one method for spraying chemicals, fertilizers, etc. to paddy fields and field crops. The passenger management machine is generally configured as a three-wheeled or four-wheeled traveling vehicle in which a chemical liquid tank, a granule tank, an engine, a chemical liquid pump, a centrifugal blower, and the like are mounted on the upper surface of a gantry constituting the airframe.
[0003]
And, for example, when the riding management machine is used for both chemical solution and granule spraying, a boom type chemical solution spraying provided by a spray nozzle or the like provided with a driver's seat at substantially the center of the top surface of the gantry and being vertically movable is possible. The device is provided in the front, the granule spraying device is provided in the rear, and the like, and the balance of the airframe and the power transmission mechanism during traveling and spraying work are considered.
[0004]
Moreover, it provides so that the ventilation from the said centrifugal blower can blow to the said chemical | medical solution and granule spraying apparatus which were provided before and behind the body, and in the said boom type chemical spraying apparatus, the chemical | medical solution sprayed from an injection nozzle is more than necessary. It is used for air assist to form an air curtain so as not to diffuse, and in the above-mentioned granule spraying device, it is configured for air blowing conveyance of granules etc., and generally the air blowing side is simply opened by a valve or the like provided in the air passage. The air blowing direction is switched by setting the state.
[0005]
[Problems to be solved by the invention]
However, in the blower switching device that simply opens the blower side with a valve or the like provided in the conventional blower passage, the blower direction can be switched. However, when the blower is stopped, the blower fan is driven. It is necessary to separately provide an ON / OFF switch for the electric motor and a clutch for the blower. In addition, each time the air flow is stopped, it is necessary to operate the fan fan ON / OFF switch, to input / release the fan clutch, etc. Cost.
[0006]
Further, when resuming air blowing, it is necessary to restart the air blowing fan and re-input the air blower clutch, and at the time of stopping and restarting driving systems such as V-belts, transmissions and clutches, etc. There was a problem such as an increase in the burden on the company.
[0007]
The present invention has been made in view of the above circumstances, and it is possible to easily switch the air flow from the blower to the chemical solution and the granule spraying device and to stop the air flow with one touch operation without any trouble, and to the drive system. It is an object of the present invention to provide a blower switching device that reduces the burden and further simplifies and reduces the weight of the fuselage.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides a valve chamber in which an arcuate bulging portion having a blower inlet intersecting at right angles between left and right airflow passages, the base portion of which is the arcuate bulge. The switching piece is fixed on the rotation shaft located at the center of the arc of the part, and in the neutral position, both the switching pieces are located at the left and right ends of the air inlet, respectively, close the air inlet, At the time of switching air flow to one side, a V-shaped valve is provided in which one of the switching pieces on the side of the one air flow path to be blown closes the other air flow path on the opposite side. which has a configuration in which a partition plate for blocking between the deflection outer peripheral portion of the airflow path extends it is tilted toward the position provided adjacent to the base of the valve to the deflection outer periphery of each of the air passage It is.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic overall perspective view showing an example of a passenger management machine equipped with a blower switching device according to an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view of a main part showing when air blow is stopped by the blower switching device of the present embodiment. 3 is a cross-sectional view taken along the line III-III in FIG. 2, FIG. 4 is a vertical cross-sectional view showing a state of switching air flow, and FIG. 5 is a vertical cross-sectional view showing another state of air flow switching.
[0010]
FIG. 1 shows an example of a riding management machine equipped with a blower switching device according to an embodiment of the present invention. In this riding management machine, a chemical spraying device 2 is provided in front of a gantry 1 constituting the airframe, a granule spraying device 3 is provided in the rear, and a driver's seat 4 is provided in the approximate center. In the figure, 5 is a chemical solution tank, 6 is a granule tank, and 7 is a centrifugal blower.
[0011]
In the riding management machine shown in the drawings, the chemical spraying device 2 provided in front of the gantry 1 is provided with a boom member 8 that can be expanded or folded in the left-right direction perpendicular to the traveling direction of the machine body, and its lower surface. The spray nozzles 9 are provided at appropriate intervals in the section, and air blowers (not shown) for air blown from the blower 7 through the aggregate of the gantry 1 to the both front and rear sides of the plurality of spray nozzles 9 ), And air curtains are formed on both front and rear sides of the injection nozzle 9.
[0012]
Further, the chemical spraying device 2 is supported by a parallel link type lift arm 10 whose one ends are pivotally supported on the left and right side surfaces of the gantry 1, and moves up and down according to the height of paddy fields, crops, etc. Highly adjustable.
[0013]
The granule spraying device 3 for spraying the granule provided behind the gantry 1 is not shown in detail, but the air blown from the blower 7 causes the granule tank 6 to be sprayed. The stored granule is blown and transported to be dispersed. That is, the frame 1 and the flexible tube are formed from the blower 7 toward the chemical spraying device 2 provided in front of the mount 1 and the granule spraying device 3 provided in the rear of the mount 1. The front blast pipe 11 and the rear blast pipe 12 are extended and connected.
[0014]
The air blowing switching device 13 according to the present embodiment is provided at a connection portion between the blower 7 and the front (left side) air pipe 11 and the rear (right side) air pipe 12. Specifically, as shown in FIGS. 2 to 5, first, a cylindrical front (left side) air passage 14 and a rear (right side) air passage 15 are provided in a straight line, and the linear portion A blower inlet 16 to which the air outlet 7a of the blower 7 is connected is provided at the center upper part so as to intersect at right angles.
[0015]
Further, arcuate bulges 17 and 17a are formed on the left and right sides of the connecting portion between the front air passage 14 and the rear air passage 15 and the air inlet 16, and the arcuate bulges 17 and 17a A valve chamber 19 is formed along the inner periphery to enable a later-described V-shaped valve 18 to be rotated.
[0016]
In the valve chamber 19, a base 18c is pivotally supported on a rotation shaft 22 located at the center of the arc of the bulging portions 17 and 17a, and along the inner surfaces of the bulging portions 17 and 17a. A V-shaped valve 18 having two switching pieces 18a and 18b formed in a substantially V-shape that rotates in an upper region in the valve chamber 19 is provided.
[0017]
When the air flow is stopped, the V-shaped valve 18 is positioned so that the front ends of both switching pieces 18a and 18b are located at the left and right side end portions 16a and 16b of the air inlet 16 so as to close the air inlet 16, respectively. At the time of switching operation to the front air passage 14 or the rear air passage 15 in advance, the switching piece 18b on the side of the rear air passage 15 to be blown is on the opposite side, for example, as shown in FIG. In this case, the other switching piece 18 a is positioned in the front air passage 14.
[0018]
The above configuration is the same when the air flow is switched to the front air passage 14, and as shown in FIG. 5, the switching piece 18a on the front air passage 14 side to be blown is the rear air blow on the opposite side. The passage 15 is closed, and the other switching piece 18 b is positioned in the rear air blowing passage 15.
[0019]
Further, a partition that extends from a position adjacent to the base portion 18c of the V-shaped valve 18 in the lower region of the valve chamber 19 and that blocks the diverting outer peripheral portions 14a and 15a of the air passages 14 and 15 is provided. Plates 20 and 20 are provided. In the present invention, the partition plates 20 and 20 extend from a position adjacent to the base portion 18c of the V-shaped valve 18 and are directed toward the turning outer peripheral portions 14a and 15a on the air passages 14 and 15 side, respectively. It is inclined so obtained structure.
[0020]
In the figure, reference numeral 21 denotes a ventilation switching lever which is provided at the outer end of the rotary shaft 22 of the V-shaped valve 18 and can hold the switching position, and 23 is a bearing of the rotary shaft 22.
[0021]
For example, as shown in FIG. 1, the air flow switching device 13 of the present embodiment having the above-described configuration has the front air duct 11 connected to the front air duct 14 and the rear air duct 12 connected to the rear air duct 15. Have been used.
[0022]
And, for example, when the air blowing switching lever 21 is operated to the neutral position, as shown in FIG. 2, the front ends of both the switching pieces 18a, 18b are left and right side end portions 16a of the air inlet 16, The air inlet 16 is closed by the switching pieces 18a and 18b, and the air blowing from the blower 7 is blocked.
[0023]
Next, when the air blowing switch lever 21 is operated to rotate the V-shaped valve 18 by a predetermined angle in the counterclockwise direction as shown in FIG. The front end of the switching piece 18b on the 15 side is positioned at the left end 16a of the air inlet 16, and the front air passage 14 is closed, and the other switching piece 18a is located in the front air passage 14. The air from the blower 7 is turned by the switching piece 18b and the partition plate 20 and is blown toward the rear air passage 15.
[0024]
Further, when the air flow switching lever 21 is operated to rotate the V-shaped valve 18 by a predetermined angle in the clockwise direction as shown in FIG. The tip of the switching piece 18a is positioned at the right end 16b of the air inlet 16, the rear air passage 15 is closed, and the other switching piece 18b is located in the rear air passage 15. The air from the blower 7 is turned by the switching piece 18 a and the partition plate 20 and is blown toward the front air passage 14.
[0025]
Furthermore, in the present invention, since the partition plates 20 and 20 are provided to be inclined from the base portion 18c of the V-shaped valve 18 toward the turning outer peripheral portions 14a and 15b of the air passages 14 and 15 , respectively, Does not occur, and air blowing is performed smoothly.
[0026]
In addition, it cannot be overemphasized that the ventilation switching device of this invention is not limited for the said riding management machines, It can apply also to various ventilation apparatuses.
[0027]
【The invention's effect】
According to the present invention, since air blowing can be switched and air blowing can be stopped, the ON / OFF switch and fan clutch for driving the fan for blowing can be eliminated, the burden on the drive system can be reduced, and the airframe The effect that simplification and weight reduction of the whole can be achieved is obtained.
[Brief description of the drawings]
FIG. 1 is a schematic overall perspective view showing an example of a passenger management machine equipped with an air flow switching device according to an embodiment of the present invention.
FIG. 2 is a longitudinal sectional view of a main part showing when air blowing is stopped by the air flow switching device according to the embodiment.
3 is a cross-sectional view taken along arrows III-III in FIG.
FIG. 4 is a longitudinal sectional view showing a blowing switching state.
FIG. 5 is a longitudinal sectional view showing another state of air blowing switching.
[Explanation of symbols]
13 Blower switching device 14 Front air passage 14a Turning outer periphery 15 Rear air passage 15a Turning outer periphery 16 Air inlet 16a, 16b Side end portion 17, 17a Swelling portion 18 V-shaped valve 18a, 18b Switching piece 18c Base portion 19 Valve chamber 20, 20 Partition plate 22 Rotating shaft

Claims (1)

In the valve chamber (19) in which the arcuate bulges (17, 17a) having the air inlets (16) intersecting at right angles between the left and right air passages (14, 15) are formed, the base ( 18c) is fixed on the rotating shaft (22) located at the center of the arc of the arcuate bulges (17, 17a), and the switching pieces (18a, 18b) are respectively blown in the neutral position. The blower inlet (16) is located at both left and right end portions (16a, 16b) of the inlet (16) and is blown when switching the blower to one of the blower passages (14, 15). A V-shaped valve (18) is provided in which one of the switching pieces (18b) on one air passage (15) side closes the other air passage (14) on the opposite side, and further, the V-shaped valve is provided. from the to adjacently provided to the base (18c) the position of the shaped valve (18) Respectively the deflection outer peripheral portion of the air passage (14,15) (14a, 15a) said deflection outer peripheral portion of the airflow path extends is tilted toward the (14,15) (14a, 15a) between A blower switching device, characterized in that a partition plate (20, 20) for blocking the air is provided.

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