JPH10272390A - Air sending line change-over device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To change over and stop air sending line, eliminate the necessity of ON of OFF switches and clutches for driving a fan, to reduce the burden on a driving system, and to simplify and reduce the weight of the machine body. SOLUTION: The device is provided with a V-shaped valve 18 having its base 18c supported rotatably and blocking an air inlet 16 by positioning both change-over pieces 18a and 18b on both sides 16a and 16b of the air inlet 16 and also having the function of blocking either of air lines 14 or 15 at the time of changing over the air from one line to the other line or vice versa, for instance, blocking the air line 14 on the opposite side by using one piece 18b on the side of one air line 15 to be used or vice versa in a chamber 19 having the air inlet 16 crossing orthogonally between air lines 14 and 15, left and right, and also having arc-shaped swelling sections 17 and 17a. Also interstructures 20, 20 for shutting off between deflected outer peripheral sections 14a and 15a of the air lines 14 and 15 are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation switching device suitable for use as a riding control device for spraying chemicals, fertilizers and the like on paddy and field crops.

[0002]

2. Description of the Related Art Conventionally, a passenger management machine has been used as one method of spraying chemicals, fertilizers, and the like on crops in paddy fields and fields. The riding management machine is generally provided with a chemical solution tank, a granular material tank, an engine, a chemical solution pump,
It is configured as a three- or four-wheeled free-running vehicle equipped with a centrifugal blower or the like.

[0003] For example, when the riding management machine is used for both chemical solution and granule spraying, a driver's seat is provided substantially at the center of the upper surface of the gantry, and a boom composed of an injection nozzle or the like which is vertically movable. It is configured in consideration of the balance of the machine body during running and spraying work, a power transmission mechanism, and the like, such as a shape spraying device is provided at the front and a granule spraying device is provided at the back.

In addition, the centrifugal blower is provided so that air can be blown to the chemical and granule spraying devices provided before and after the machine body. In the boom type chemical spraying device, the chemical sprayed from the spray nozzle is provided. It is for air assist for forming an air curtain so as not to diffuse more than necessary, and in the granule spraying device, it is configured for blowing and conveying granules and the like, and is generally configured by a valve provided in a blowing path and the like on the blowing side. Is simply opened to switch the air blowing direction.

[0005]

However, in the conventional air blower switching device in which the air blow side is simply opened by a valve or the like provided in the air blow path, the air blow direction can be switched. It is necessary to separately provide an ON / OFF switch of an electric motor for driving a fan for blower and a clutch for a blower, and furthermore, every time the blower is stopped, an ON / OFF switch of the fan for blower and an input of a clutch for the blower are required. , A release operation is required, and so on.

Further, in restarting the blower, the blower fan must be restarted and the clutch for the blower must be re-input, and a drive system such as V
There have been problems such as an increase in the load at the time of stopping and restarting the driving of the belt, transmission, clutch, and the like.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is possible to easily switch and stop the air supply from a blower to a chemical and granule spraying device by one-touch operation without any trouble. It is an object of the present invention to provide a blower switching device capable of reducing the load on a system and further simplifying and reducing the weight of a body.

[0008]

In order to solve the above-mentioned problems, the present invention provides a valve chamber having an arc-shaped bulging portion having an air inlet crossing a right angle between left and right air passages. The base is pivotally supported on a rotating shaft positioned at the center of the arc-shaped bulging portion, and in a neutral position, the two switching pieces are located at both left and right end portions of the air inlet so as to close the air inlet. In addition, at the time of the air blow switching to one of the air passages, a V-shaped valve is provided in which one of the switching pieces on the one air passage side to be blown respectively closes the other air passage on the opposite side, Further, a partition plate extending from a position adjacent to the base of the V-shaped valve is provided so as to block between the deflected outer peripheral portions of the air passage, and preferably, the partition plate is provided with the V-shaped valve. Forward from the position adjacent to the base of the valve Is obtained by the above is tilted toward the turning outer peripheral portion thus provided a configuration of the blower roadside.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic overall perspective view showing an example of a passenger management machine equipped with a ventilation switching device according to an embodiment of the present invention, and FIG. 3 and FIG.
FIG. 4 is a vertical cross-sectional view showing an air blowing switching state, and FIG. 5 is a vertical cross-sectional view showing another state of the air blowing switching.

FIG. 1 shows an example of a passenger management machine equipped with a ventilation switching device according to an embodiment of the present invention. In this riding management machine, a chemical liquid spraying device 2 is provided in front of a gantry 1 constituting the body, a granule spraying device 3 is provided in the rear, and a driver's seat 4 is provided substantially in the center. In the figure, 5 is a chemical tank, 6 is a granule tank, and 7 is a centrifugal blower.

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 which can be extended or folded in the left-right direction perpendicular to the running direction of the body. Injection nozzles 9 are provided on the lower surface thereof at appropriate intervals, and the pedestal 1 is provided on both front and rear sides of the plurality of injection nozzles 9 by the blower 7.
An air outlet (not shown) for air blown by using the aggregate as a conduit is provided, and air curtains are formed on both front and rear sides of the injection nozzle 9.

Further, the chemical spraying device 2 is supported by a parallel link type lift arm 10 having one end pivotally supported on both left and right side surfaces of the gantry 1 and moves up and down in accordance with the height of crops in paddy fields and fields. The height of the ground is adjustable.

Although not shown in detail, the granule spraying device 3 for spraying granules provided at the rear of the gantry 1 uses the air blown from the blower 7 to blow the granules. The granules stored in the tank 6 are blown and conveyed to be sprayed. That is, the chemical spraying device 2 provided in front of the gantry 1 from the blower 7
And the granule spraying device 3 provided behind the gantry 1
The front blower tube 11 and the rear blower tube 12 composed of the gantry 1 and the flexible tube are respectively extended and connected to the base 1.

The air blow switching device 13 according to the present embodiment
The blower 7 is provided at a connection portion between the front (left) blower tube 11 and the rear (right) blower tube 12. Specifically, as shown in FIGS. 2 to 5, first, a cylindrical front (left) air passage 14 and a rear (right) air passage 1 are formed.
5 is provided in a straight line, and a blow-in port 16 to which the blow-out port 7a of the blower 7 is connected is provided above the center of the straight portion so as to intersect at right angles.

Further, arc-shaped bulging portions 17 and 17a are formed on both left and right sides of a connecting portion between the front air passage 14 and the rear air passage 15 and the air inlet 16, and the arc-shaped bulging portions 17 are formed. , 17a along a V-shaped valve 18 to be described later.
A valve chamber 19 is formed, which enables the turning operation of the valve chamber 19.

The bulging portion 1 is provided in the valve chamber 19.
A base 18c is pivotally supported on a rotating shaft 22 located at the center of the arc of the circular arc 7, 17a, and rotates substantially in an upper region in the valve chamber 19 along the inner surface of the bulging portion 17, 17a. V-shaped valve 1 having two switching pieces 18a, 18b
8 are provided.

When the air supply is stopped, the V-shaped valve 18 closes the air inlet 16 when the ends of the two switching pieces 18a and 18b are located at the left and right ends 16a and 16b of the air inlet 16 respectively. At the time of the switching operation to the front air passage 14 or the rear air passage 15, for example, as shown in FIG. 4, the switching piece 18b on the side of the rear air passage 15 to be blown is The opposite side front air passage 14 is closed, and at this time, another switching piece 18a is located in the front air passage 14.

The same applies to the case where the air is switched to the front air passage 14, and as shown in FIG. 5, the switching piece 18a on the side of the front air passage 14 to be blown is connected to the opposite side. Of the rear air passage 15 is closed, and another switching piece 18b is closed.
Are located in the rear air passage 15.

Further, in the valve chamber 19, the outer peripheral portions 14a, 15a of the ventilation passages 14, 15 extend from a position adjacent to the base portion 18c of the V-shaped valve 18 in a lower region thereof.
Partition plates 20, 20 are provided to shut off the gap. In the embodiment shown in the drawings, the partition plates 20, 20 extend from a position adjacent to the base 18c of the V-shaped valve 18, and each of the deflection outer peripheral portions 14a on the side of the air passages 14, 15, respectively.
It is configured to be inclined toward 15a.

In the figure, reference numeral 21 denotes a rotating shaft 2 of the V-shaped valve 18.
Reference numeral 23 denotes a blower switching lever which is provided at an outer end of the rotating shaft 2 and which is capable of holding a switching position.

The blower switching device 13 of the present embodiment having the above-described structure.
For example, as shown in FIG. 1, the front air duct 14 is connected to the front air duct 14, and the rear air duct 12 is connected to the rear air duct 15.

Then, for example, the air supply switching lever 21
Is operated to bring it to the neutral position, as shown in FIG. 2, the leading ends of the two switching pieces 18a, 18b are located at the left and right side ends 16a, 16b of the air inlet 16,
The air inlet 16 is controlled by the switching pieces 18a and 18b.
Is shut off, and the blowing from the blower 7 is shut off.

Next, by operating the ventilation switching lever 21, the V-shaped valve 18 is moved as shown in FIG.
When rotated by a predetermined angle in the counterclockwise direction, the tip of the switching piece 18b on the side of the rear air passage 15 to be blown is positioned at the left end 16a of the air inlet 16,
The front air passage 14 is closed, and the other switching piece 18a is positioned in the front air passage 14 so that the air from the blower 7 blows the switching piece 18b and the partition plate 2 to each other.
The air is deflected by 0 and is blown toward the rear air passage 15.

Further, by operating the ventilation switching lever 21, the V-shaped valve 18 is moved as shown in FIG.
When it is rotated by a predetermined angle in the clockwise direction, the tip of the switching piece 18a on the side of the front air passage 14 to be blown is positioned at the right end 16b of the air inlet 16 and the rear air passage 15 Is closed, and the other switching piece 18b is positioned in the rear air passage 15 so that air from the blower 7 blows the switching piece 18a and the partition plate 20.
And the air is blown toward the front air passage 14.

As shown in the drawing, the partition plates 20, 2
If 0 is inclined downward from the base portion 18c of the V-shaped valve 18 toward the respective air passages 14 and 15, turbulence does not occur and air is blown smoothly.

It is needless to say that the ventilation switching device of the present invention is not limited to the above-mentioned riding management machine, but can be applied to various ventilation devices.

[0027]

According to the present invention, since the air supply can be switched and the air supply can be stopped, ON and O for driving the air supply fan can be achieved.
The FF switch and the clutch for the blower can be eliminated, and the load on the drive system can be reduced, and further, the effect of simplifying and reducing the weight of the entire body can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic overall perspective view showing an example of a passenger management machine equipped with a ventilation switching device according to an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of a main part illustrating a state where air blowing is stopped by an air blowing switching device of the present embodiment.

FIG. 3 is a sectional view taken along the line III-III in FIG. 2;

FIG. 4 is a vertical cross-sectional view showing a state in which air is switched.

FIG. 5 is a vertical cross-sectional view showing another state of air flow switching.

[Explanation of symbols]

 13 Ventilation switching device 14 Front ventilation path 14a Deflected outer peripheral part 15 Rear ventilation path 15a Deflected outer peripheral part 16 Ventilation inlet 16a, 16b Side end 17, 17a Swelling part 18 V-shaped valve 18a, 18b Switching piece 18c Base 19 Valve chamber 20, 20 Partition plate 22 Rotation axis

Claims (2)

[Claims] An inside of a valve chamber (19) in which an arc-shaped bulging portion (17, 17a) having a ventilation inlet (16) intersecting at right angles between right and left ventilation paths (14, 15) is formed. The base (18c) has the arc-shaped bulge (17,
17a) is pivotally supported on a rotating shaft (22) positioned at the center of the arc, and the two switching pieces (18a, 18) in the neutral position.
b) are located at both left and right end portions (16a, 16b) of the air inlet (16) to close the air inlet (16), and when air is switched to one of the air passages (14, 15). A V-shaped valve (18) is provided in which one of the switching pieces (18b) on the side of the one air passage (15) to be blown respectively closes the other air passage (14) on the opposite side. Further, a partition plate (20) extending from a position adjacent to the base portion (18c) of the V-shaped valve (18) to shut off between the deflected outer peripheral portions (14a, 15a) of the air passages (14, 15). , 20) is provided. 2. The V-shaped valve (1), wherein the partition plate (20) is
8) from the position adjacent to the base portion (18c), the turning outer peripheral portion (14) on the side of the air passage (14, 15).
The blower switching device according to claim 1, wherein the blower switching device is provided to be inclined toward (a, 15a).