JP2003024833A - Cock device and electric sprayer - Google Patents

Abstract

(57) [Problem] To provide a cock device in which spraying at a set spray pressure is started simultaneously with opening and closing of an on-off valve, and in which electric power consumption by an electric pump can be reduced as much as possible. SOLUTION: An opening and closing operation member 19, 52 of an on-off valve 18 for opening and closing a flow path 32 and switches 20, 55 of an electric pump 7 for supplying the liquid L to the flow path 32 are operated by a series of operations by an operator M. The opening and closing valve 18 is opened after the electric pump 7 is started. When the on-off valve 18 is opened, the electric pump 7 has already been started, so that spraying at a predetermined set pressure is performed at the same time as the on-off valve 18 is opened. The operation time of the electric pump 7, which is not involved in the actual spraying, is a short time from the start of the electric pump 7 by the operation of the open / close operating members 19, 52 by the operator M to the opening of the open / close valve 18. Power consumption is also saved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cock device, and more particularly to a cock device having an opening / closing operation member for an opening / closing valve for opening / closing a flow passage and an electric pump switch for supplying liquid to the flow passage. It is a thing. The present invention also relates to an electric sprayer having the cock device.

[0002]

2. Description of the Related Art An electric sprayer is known as a kind of a portable sprayer for spraying a liquid such as a control liquid on agricultural crops. According to the electric sprayer, when the electric pump is turned on, the electric pump is started, and the spray liquid in the tank is sucked, and is pressure-fed toward the spray nozzle through the discharge passage. Therefore, when the open / close valve interposed in the discharge flow path is opened by operating the cock lever as the open / close operation member, the spray liquid is sprayed from the spray nozzle. While the on-off valve is closed, the spray liquid pressure-fed by the operation of the electric pump is released through a spill passage that connects the upstream side of the on-off valve in the discharge passage to the tank. The valve is automatically returned to the tank by automatically opening with increasing hydraulic pressure.

From the viewpoint of improving the efficiency of the spraying work using the sprayer as described above, it is desirable that the spraying at the set spraying pressure be started at the same time as the opening / closing valve is opened. For this purpose, the electric pump is always operated during the spraying work, and only the cock lever is operated while the hydraulic pressure in the discharge passage is kept at a predetermined set value. It is convenient to do the actual spraying while opening and closing.

[0004]

However, when the work is performed with the electric pump being operated, the electric power for driving the electric pump is wastefully consumed while the on-off valve is closed. Will be. However, every time the cock lever is operated, immediately before that, it is complicated to perform the "ON" operation as a separate operation of the pump switch, and there is a problem that the work efficiency is rather reduced.

The present invention has been made in view of the above circumstances, and at the same time when the opening / closing valve is opened, the spraying at the set spraying pressure is started, and the electric power consumption by the electric pump is saved as much as possible. The present invention seeks to provide a cock device and an electric sprayer.

[0006]

In order to solve the above problems, a cock device according to the present invention includes an opening / closing operation member for an opening / closing valve for opening / closing a flow passage, and a switch for an electric pump for supplying a liquid to the flow passage. Are linked to each other by an operating mechanism so that the opening / closing valve opens after the electric pump is started by a series of operations by the operator (claim 1).

Further, the electric spraying machine according to the present invention comprises a spraying nozzle, an electric pump for pumping liquid to the spraying nozzle,
An opening / closing valve for opening / closing a discharge flow path between the electric pump and the spray nozzle, an opening / closing operation member for the opening / closing valve, and a switch for the electric pump are provided, and the opening / closing operation member and the switch are provided. The operation mechanism is linked to each other so that the on-off valve opens after the electric pump is started by a series of operations by the operator (claim 2).

According to the cock device and the electric sprayer of the present invention, the electric pump has already been started by a series of operations by the operator before the opening / closing valve is opened. Therefore, at the same time as the opening / closing valve is opened, spraying is performed at a predetermined set pressure, so that work efficiency is improved. Further, the operating time of the electric pump that is not involved in the actual spraying is only a short time from the start of the operation of the electric pump by the operation of the opening / closing operation member by the operator to the opening of the opening / closing valve. Therefore, power consumption is also saved.

As a preferred embodiment, in the cock device and the electric sprayer, the opening / closing operation member is in a first operation position where the switch is turned on and the electric pump starts to operate, and the electric pump operates. In this state, the on-off valve can be operated freely at the second operation position where it is opened (claim 3).

In this case, when the operator operates the opening / closing operation member to the first operation position, the switch is turned on and the electric pump is started. Therefore, the operator holds the opening / closing operation member in the first operation position for a very short time necessary for the hydraulic pressure of the discharge flow path to rise to a predetermined set value, and thereafter, , Operating the opening / closing operation member to the second operation position. As a result, spraying at a predetermined set pressure is performed at the same time when the on-off valve is opened.

Since the operating time of the electric pump that is not involved in the actual spraying is only a short time during which the opening / closing operation member is held in the first operation position by the operator,
Power consumption is saved and the life of the electric pump is extended. In addition, operability is good because it is sufficient to hold the opening / closing operation member in the first operation position for a short period of time and then operate the opening / closing operation member to the second operation position.

In the cock device and the electric sprayer, it is possible to provide the operator with a notification means for notifying that the opening / closing operation member has reached the first operation position. 4). With this configuration, the operator can easily recognize the state in which the electric pump is operating but the opening / closing valve is not opened, so that the opening / closing operation member is reliably held in the first operation position. It is possible and preferable. The aforesaid recognizing means is, for example, a click-stop mechanism having a well-known configuration, which enables the operator to recognize that the opening / closing operation member is in the first operation position without looking at the hand. Things are desirable.

Further, as another preferred embodiment, a holding means for holding the opening / closing operation member at least at the first operation position may be provided (claim 5). With this configuration, even if the opening / closing operation member is released from the hand, the opening / closing operation member stops at the first operation position, which is convenient and is preferable.

The holding means may be of a type manually operated by the operator, but from the viewpoint of improving operability, it is preferable that the holding means is operated from the non-operation position of the opening / closing operation member to the first operation position. It is preferable that it is automatically operated in response to an operation to one operation position (claim 6).

As another preferred embodiment of the present invention,
A holding means for holding the opening / closing operation member in the first operation position and the second operation position, the holding means comprising:
The opening / closing operation member is automatically operated in response to the operation from the non-operation position to the first operation position, and the opening / closing operation member is operated from the first operation position to the second operation position. It may be configured to automatically operate according to the above (claim 7).

In the electric sprayer according to the present invention, further, a tank having a suction port of the electric pump in communication with each other,
A stirring means for stirring the liquid in the tank by the operation of the electric pump may be provided (claim 8). In this case, by starting the operation of the electric pump before the opening / closing valve is opened,
In addition to the action already described, the liquid in the tank is stirred by the stirring means before the start of spraying. For this reason, as the spray liquid, for example, a powder and granules dissolved in water (solvent) is used, and even when the powder and granules are difficult to dissolve in water, the powder and granules are sufficiently mixed with water. It is more preferable because the spraying can be performed in the state of being kept.

As the stirring means, a stirring blade or the like which rotates in the tank in conjunction with the operation of the electric pump can be used, but in addition, in the discharge passage communicated with the discharge port of the electric pump. A spillage channel that connects the upstream side of the on-off valve to the tank, and a relief valve interposed in the spillage channel are provided, and of the liquid returned to the tank from the spillage channel. If the stirring is performed by hydraulic pressure (claim 9), it is not necessary to provide the stirring blades or the like, extra power is not required, and the configuration is simplified, which is more preferable.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a perspective view of a backpack type electric sprayer as an example of an electric sprayer equipped with a cock device according to an embodiment of the present invention, and FIG. 2 is a spray of the electric sprayer of FIG. It is a circuit diagram.

As shown in FIG. 1, an electric sprayer 1 according to this embodiment has a backpack-type sprayer main body 2 and a hand-held sprayer main body 2 connected to the sprayer main body 2 via a flexible hose 3. And the spray rod 4 of.

The sprayer main body 2 has a spray liquid L such as a control liquid.
A tank 5 for storing the fuel, an electric pump 7 for pumping the spray liquid L in the tank 5 to a spray nozzle 6 at the tip of the spray rod 4, an electric motor 8 for driving the pump 7, and an electric motor A rechargeable battery 9 serving as a power source of the motor 8 is provided. The tank 5 has an openable and closable cap 10 for supplying the spray liquid L therein, and a pair of left and right shoulder straps 11 and 11. The pump 7, the electric motor 8 and the battery 9 are housed in a rearward recess 13 formed on the back support side of the tank 5 and fixed to the tank 5,
It is covered with a back support plate 12 having a cushioning property.

The spray rod 4 has a handle 15 having the cock device 14 according to the present embodiment, an elongated liquid guiding tube 16 connected to the front part of the handle 15, and a tip portion of the liquid guiding tube 16. The attached spray nozzle 6 is provided. In the present embodiment, as the spray nozzle 6, a bifurcated nozzle in which the spray angle is vertically shifted is adopted, but the present invention is not limited to this. Although the detailed configuration will be described later, the spray liquid L pumped by the electric pump 8 is sent to the handle 15 through the flexible hose 3,
An on-off valve 18 provided in a discharge flow path 17 in the handle 15.
Is sprayed from the spray nozzle 6 through the liquid guiding tube 16 by being opened by operating the cock lever 19 as an opening / closing operation member.

The handle 15 is provided with the cock lever 19 for opening / closing the opening / closing valve 18 and a switch 20 for opening / closing a drive circuit of the electric motor 8 for driving the pump 7. Has been done. As will be described later in detail, the cock lever 19 and the motor switch (pump switch) 20 are connected to the open / close valve 1 after the pump 7 is started by a series of operations by an operator (operator) M.
The operation mechanism is linked to each other so that 8 is opened.
The motor switch 20 is connected to the drive circuit of the electric motor 8 by an electric cord 21 wired along the flexible hose 3.

The operator M carries the sprayer main body 2 with the pair of left and right shoulder straps 11, 11 while holding the handle 15 and operating the cock lever 19 with his thumb, and at the same time as the sprayer. The spray liquid L is sprayed onto a crop or the like while swinging the rod 4 left and right.

Next, referring to FIG. 2, the electric atomizer 1
The spraying circuit of will be described.

The suction port 22 of the pump 7 has a suction passage 2
The bottom of the tank 5 is connected to the bottom of the tank 5. In addition, the discharge port 24 of the pump 7 is connected to the flexible hose 3
It is connected to the spray nozzle 6 through the discharge flow path 17 including the above and the liquid guide tube 16.

The on-off valve 18 in the discharge passage 17
The upstream side of the is communicated with the tank 5 through the spillway 25. A relief valve 26 having a spray pressure adjusting function is provided in the spillway 25. While the pump 7 is operating, but the open / close valve 18 is not open, the relief valve 26 is automatically opened by the hydraulic pressure in the discharge passage 17, so that the pump 7 is pressure-fed. The spray liquid L is returned to the tank 5 as spilled water through the spillage channel 25. Further, even during the actual spraying operation in which the pump 7 is operated and the opening / closing valve 18 is opened, the spray liquid L corresponding to the liquid pressure exceeding the set spray pressure set by the relief valve 26 is It is returned to the inside of the tank 5 via the spillway 25.

In this embodiment, the spillway 25 having the relief valve 26 is used as a stirring means for stirring the spray liquid L in the tank 5 in conjunction with the operation of the pump 7. ing. That is, the tip 25a of the spill channel 25 is arranged at the bottom of the tank 5, and the tank 5 is supplied with the spray liquid L returned to the tank 5 via the spill channel 25. The spray liquid L in
Is allowed to stir well.

Thus, for example, as the spray liquid L, even when a powder or granule is dissolved in a solvent such as water, and the powder or granule is hardly soluble in water, the powder or granule is It is preferable because spraying can be performed in a state of being sufficiently mixed with water. Further, compared to a case where a stirring blade or the like (not shown) that rotates in the tank 5 in conjunction with the operation of the pump 7 is separately provided as stirring means, the configuration is more rational and intensive, which is more preferable.

If necessary, a stirring nozzle (not shown) may be connected to the tip 25a of the spill channel 25, or the spill channel 25 may extend over a predetermined length range on the tip 25a side. A plurality of spillage holes (not shown) are provided, and the tip portion 25a of the spillage channel 25 is formed so that the spillage is evenly ejected from the plurality of spillage holes to the entire inner bottom surface of the tank 5. By arranging the side in the tank 5,
It is also possible to allow the remaining water to stir more effectively.

Next, referring to FIG. 3, the cock device 1 will be described.
4 will be described in detail. FIG. 3 is a partially cutaway side view showing the inside of the handle 15 including the cock device 14 according to the present embodiment.

In FIG. 3, the case 2 of the handle 15 is shown.
7 is formed by joining a pair of substantially identical left and right case halves 28 to each other. A valve casing 29 is arranged in the handle case 27, and in the valve chamber 30 of the valve casing 29,
The valve body 31 of the opening / closing valve 18 is constantly pressed against the valve seat 34 by a valve spring (compression coil spring) 33 so as to liquid-tightly close the opening / closing port 32 forming the discharge passage 17. The flexible hose 3 is liquid-tightly connected to the liquid inlet 35 of the valve casing 29 via a screw-type pipe joint 36. On the other hand, the liquid guide pipe 16 is liquid-tightly connected to the liquid outlet 37 of the valve casing 29.

A valve shaft 38 integrally formed with the valve body 31.
Retains liquid tightness with the valve casing 29 and protrudes upward from the valve casing 29.

The motor switch 20 is also disposed in the handle case 27. In the present embodiment, as the motor switch 20, a type in which the switch is turned off (OFF) when the switch lever 39 is pushed and the switch is turned on (ON) when the switch lever 39 is released is adopted.

The opening / closing operation of the opening / closing valve 18 and the ON / OFF operation of the motor switch 20 are performed by a series of swinging movements of the cock lever 19 pivotally supported on the handle case 27 by a lever shaft 40 so as to be rotatable back and forth. It is done by operation. The cock lever 19 sandwiches an operating portion 41 for the operator M to put an operating finger, and before and after the operating portion 41, a valve driving portion 42 for opening and closing the opening / closing valve 18 and the motor switch 20 are turned on. A switch drive unit 43 in the form of a leaf spring for performing the -OFF operation is integrally provided. The operation portion 41 projects upward from the handle case 27 so that the operator M can easily operate it with the fingers of the hand holding the handle 15.

The cock lever 19 is constantly urged by a cock lever return spring 44 so as to be held at the non-operating position N shown by the solid line in FIG. The cock lever 19
Is in the non-operating position N, the switch drive unit 43 presses the switch lever 39, and the valve drive unit 42 is away from the valve shaft 38 of the opening / closing valve 18. Therefore, the drive circuit of the electric motor 8 is open, the electric motor 8 is inoperative, and the opening / closing port 32 forming the discharge flow path 17 is also closed.

The cock lever 19 moves from the non-operating position N to a first operating position P1 and a first operating position P1.
The swing operation can be freely performed to the second operation position P2 that is continuous with. At the first operation position P1, the switch drive unit 43 is separated from the switch lever 39 as shown by the alternate long and short dash line in FIG. 3, but the valve drive unit 42 still pushes down the valve shaft 38. Not in the operating position. Therefore, when the cock lever 19 is operated to the first operation position P1, the motor switch 20 is turned on to start the electric motor 8 and the pump 7, but the opening / closing port 32 is closed. Therefore, the spray liquid L in the tank 5 which is pumped by the pump 7 is
It is returned to the tank 5 through the spillway 25 shown in FIG.

On the other hand, at the second operation position P2 of the cock lever 19, the switch driving section 43 is separated from the switch lever 39 as shown by the chain double-dashed line in FIG.
In addition, the valve drive unit 42 is in an operation position where the valve shaft 38 is pushed down. Therefore, the cock lever 19
Is operated from the first operation position P1 to the second operation position P2 in front of the first operation position P1, the opening / closing valve 18 opens with the electric motor 8 and the pump 7 already operating. Therefore, the spray liquid L in the tank 5 which is pumped by the pump 7 exits from the opening / closing port 32, flows into the liquid guiding pipe 16, and is ejected from the spray nozzle 6.

When the worker M puts his finger on the operating portion 41 of the cock lever 19 and rotates the operating portion 41 in the non-operating position N forward by a predetermined angle, the cock lever 19 is displaced to the first operation position P1 and the operation portion 41 is further rotated forward by a predetermined angle from the first operation position P1, the cock lever 19 is moved to the second operation position. Displaced to P2.
Therefore, the worker M moves the cock lever 19 to the first operation position P1 only for a short time necessary for the pump 7 to start and the discharge liquid flow path 17 to be filled with the spray liquid L. After holding, the second operation position P
When the cock lever 19 is swung to 2, the on-off valve 18 can be opened and the spray can be performed at a predetermined spray pressure at the same time. Therefore, the spraying work efficiency is improved.

In the case where the spray liquid L in the tank 5 is a solution of powder and granules in water, the time for holding the cock lever 19 at the first operation position P1 is the spray liquid. Depending on the characteristics of L, it may be set longer, for example, one or two minutes. By doing so, the spillway 2 shown in FIG.
Since the spray liquid L in the tank 5 is sufficiently agitated before the start of spraying by the liquid pressure of the spray liquid L returned to the tank 5 via 5,
It is preferable because the spraying can be performed at a uniform concentration.

Further, the cock lever 19 is provided between the handle case 27 and the cock lever 19 against the biasing force of the cock lever return spring 44, and the first operation position P1 and the second operation position P1. Hold it in the operating position P2,
For example, a hook 4 that can be engaged with and disengaged from the cock lever 19
It is also possible to provide a lever holding means such as a rotatable lever restraining arm 45 having 6, 47.

In this case, the worker M rotates the lever restraining arm 45 to engage the one hook 46 with the operating portion 41 of the cock lever 19 at the first operating position P1. If you stop it, the cock lever 1
9 is held at the first operation position P1. Similarly, if the other hook 47 is locked to the operation portion 41 of the cock lever 19 in the second operation position P2, the cock lever 19 is held in the second operation position P2. . With this configuration, even if the worker M releases his hand from the cock lever 19,
Is the first operation position P1 and the second operation position P2
Since it is held at, there is no finger fatigue even when the spraying work is continued for a long time, which is preferable.

In particular, if the lever restraining arm 45 can hold the cock lever 19 not only at the second operating position P2 but also at the first operating position P1, Before the start of the spraying, the cock lever 19 is used to sufficiently stir the spray liquid L in the tank 5 with the spray liquid L returned as spillage.
Even when it is desired to hold the operator at the first operation position P1 for a relatively long time, there is no fatigue of the operator M's finger, which is more suitable.

Further, the operator M is informed that the cock lever 19 has reached the first operation position P1 which is an unstable operation position compared to the second operation position P2, for example, It is also possible to provide a not-shown consciousness means 100 such as a click stop mechanism having a known structure per se. By doing so, the operator M can easily recognize the state in which the pump 7 is operating but the opening / closing valve 18 is not open without looking at the operating position of the cock lever 19 at hand. It is more preferable because the starting operation of the pump 7 before the start of spraying can be performed easily and surely.

The worker M operates the lever restraining arm 4
5 is released to release the cock lever 19 in the first or second operation position P1, P2, the cock lever 19 is automatically moved to the non-operation position N by the urging force of the cock lever return spring 44. Since the opening / closing port 32 is closed, the operations of the electric motor 8 and the pump 7 are stopped at the same time. As described above, according to the present embodiment, the operating time of the pump 7 that is not involved in actual spraying depends on the cock lever 19 by the worker M.
Since it is only a short time from the start of the operation of the pump 7 to the opening of the opening / closing valve 18 by the operation, the power consumption of the battery 9 is saved, and the electric motor 8 and the pump 7 are saved. Has the advantage of extending the service life of the

Next, another embodiment of the present invention will be described with reference to FIG. FIG. 4 is a partially cutaway side view showing the inside of the handle 51 including the cock device 50 according to another embodiment of the present invention. Handle 5 according to the present embodiment
The disposing position of the electric spraying machine 1 of No. 1 is also the same as that of the above-mentioned embodiment.

In this embodiment, a grip type cock lever 52 is adopted as the opening / closing operation member of the cock device 50.

In FIG. 4, the case 5 of the handle 51 is shown.
Similarly to the above-mentioned embodiment, 3 is also formed by joining a pair of left and right case halves 54, 54, which are substantially the same, to each other. A valve casing 29 is arranged in the handle case 53. The valve casing 29 is arranged upside down from that of the above-described embodiment, and the detailed internal structure and relationship with other components are the same as those described above. The same reference numeral is given to omit redundant description.

A motor switch 55 is also provided in the handle case 53. In the present embodiment, contrary to the above embodiment, the motor switch 55
In this case, when the switch lever 56 is released, the switch is turned off (OFF), and when the switch lever 56 is pushed, the switch is turned on (ON).

The opening / closing operation of the opening / closing valve 18 and the ON / OFF operation of the motor switch 55 are carried out by a series of operations of the grip type cock lever 52 pivotally supported by the lever case 57 on the handle case 53. It is done by operation.

On the cock lever 52, an operating portion 58 for the operator M to grip and operate, a valve driving portion 59 for opening and closing the opening / closing valve 18, and an ON-OFF operation for the motor switch 55. And a switch drive unit 60 in the form of a leaf spring. The operation portion 58 is located below the handle case 53.

The cock lever 52 is constantly urged by a cock lever return spring 61 so as to be held at the non-operating position N shown by the solid line in FIG. The cock lever 52
Is in the non-operating position N, the switch drive unit 60 is separated from the switch lever 56, and the valve drive unit 59 is separated from the valve shaft 38. Therefore, the drive circuit of the electric motor 8 is open, the electric motor 8 is inoperative, and the opening / closing port 32 is also closed.

From the non-operating position N, the cock lever 52 is provided with a first operating position P1 and a first operating position P1.
The swing operation can be freely performed to the second operation position P2 that is continuous with. At the first operation position P1, the switch drive unit 59 is pressing the switch lever 56 as shown by the alternate long and short dash line in FIG. 4, but the valve drive unit 59 still pushes up the valve shaft 38. Not in the operating position. Therefore, when the cock lever 52 is squeezed into the first operation position P1, the motor switch 55 is turned on to start the electric motor 8 and the pump 7, but the opening / closing port 32 is closed. Therefore, the spray liquid L in the tank 5 that is pumped by the pump 7 is
Through the spillway 25 shown in FIG.
Returned to.

On the other hand, the second operating position P2 of the cock lever 52 is set in the valve drive section while the switch drive section 60 presses the switch lever 56 as shown by the chain double-dashed line in FIG. 59 is an operation position for pushing up the valve shaft 38. Therefore, the cock lever 52
From the first operation position P1 to the second operation position P
When it is operated to 2, the opening / closing valve 18 is opened in a state where the electric motor 8 and the pump 7 are already in operation, so that the spray liquid L in the tank 5 that is pumped by the pump 7 is opened. Exits from the opening / closing port 32, enters the liquid guide tube 16, and is ejected from the spray nozzle 6.

When the operator M grips the operating portion 58 of the cock lever 52 upward to the handle case 53 side by a predetermined angle, the cock lever 52 moves to the first operating position P1. When the operating portion 58 is further grasped from the first operating position P1 by a predetermined angle, the cock lever 52 is moved to the second operating position P2.
Is displaced to. Therefore, the worker M moves the cock lever 52 to the first operation position P1 only for a short time required for the pump 7 to start and the discharge liquid flow path 17 to be filled with the spray liquid L. After the holding, by further swinging the cock lever 52 to the second operation position P2, it is possible to perform spraying at a predetermined spray pressure at the same time as the opening / closing valve 18 opens. Therefore, the spraying work efficiency is improved.

Also in the case of the present embodiment, if the time for holding the cock lever 52 at the first operating position P1 is set longer, for example, one or two minutes, depending on the characteristics of the spray liquid L, The spray liquid L in the tank 5 is sufficiently agitated before the start of spraying by the liquid pressure of the spray liquid L returned to the tank 5 through the spillway 25 shown in FIG. It is preferable because spraying can be performed at various concentrations.

As in the case of the above-mentioned embodiment, between the handle case 53 and the cock lever 52,
As a lever holding means, a rotatable lever restraining arm 6
Since the second lever 2 is provided, even if the worker M releases his hand from the cock lever 52, the cock lever 52 is held at the first operation position P1 and the second operation position P2. In the present embodiment, the lower end portion 62a of the lever restraining arm 62 extends downward from the window 63 formed in the cock lever 52, and the arm urging spring 64 causes the lower end portion 62a to rotate in the clockwise direction as viewed in FIG. Is always energized. The lever restraining arm 62 includes the cock lever 5
It has upper and lower two-stage claws 65 and 66 that engage with the front edge portion 63a of the second window 63.

In the above structure, the cock lever 52
Is operated from the non-operation position N to the first operation position P1, the lower claw 66 is automatically caught on the front edge 63a of the window 63, and the cock lever 52 is operated by the first operation. It is held at the position P1. Similarly, when the cock lever 52 is operated from the first operation position P1 to the second operation position P2, the upper claw 65 is automatically caught by the front edge portion 63a of the window 63, and The cock lever 52 is held at the second operation position P2. Then, the lower end portion 62a of the lever restraining arm 62 resists the urging force of the arm urging spring 64,
When the finger is pulled counterclockwise as viewed in FIG.
Since 5, 6 are disengaged from the cock lever 52, the cock lever 52 is returned to the non-operating position N by the urging force of the cock lever return spring 61.

According to the above configuration, the cock lever 52
Is swingable from the non-operating position N to the first operating position P1, and the cock lever 52 is automatically held at the first operating position P1 by the lever restraining arm 62. In addition, the cock lever 52 is automatically held at the second operation position P2 only by swinging the cock lever 52 from the first operation position P1 to the second operation position P2. . Therefore, the operability is good and it is more preferable.

In the present embodiment as well, the fact that the cock lever 52 has reached the first operation position P1 which is an unstable operation position compared to the second operation position P2 is described above. It is even more preferable to provide a consciousness means 100 such as a click stop mechanism for making the operator M aware.

[Brief description of drawings]

FIG. 1 is a perspective view of a backpack electric sprayer as an example of an electric sprayer including a cock device according to an embodiment of the present invention.

FIG. 2 is a spray circuit diagram of the electric sprayer of FIG.

3 is a partially cutaway side view showing the inside of the handle in FIG. 1. FIG.

FIG. 4 is a partially cutaway side view showing the inside of a handle having a cock device according to another embodiment of the present invention.

[Explanation of symbols]

5 tanks 6 spray nozzles 7 Electric pump 17 discharge channel 18 open / close valve 19 Opening / closing operation member (cock lever) 20 switches 22 Pump inlet 24 Pump outlet 25 Stirrer (spillway) 26 Stirring means (relief valve) 32 discharge flow path (open / close port) 45 Holding means (lever restraining arm) 52 Opening / closing operation member (cock lever) 55 switch 62 Holding means (lever restraining arm) 100 Sense means (click stop mechanism) L liquid (spray liquid) M operator (worker) N Non-operation position P1 First operation position P2 Second operation position

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 2B121 CB03 CB25 CB28 CB53                 3H063 AA01 BB15 BB32 BB47 DA05                       DC01 GG05 GG11                 4F033 AA06 BA03 DA01 EA01 GA03                       GA11 PA04 PD01 PD06 RA14                       RA20 RD02 RD09 RD10 RE04                       RE19

Claims (9)

[Claims] 1. An on-off valve (18) for opening and closing a flow path (32).
Opening / closing operation member (19, 52) and switch (2) of the electric pump (7) for supplying the liquid (L) to the flow path (32).
0, 55) are linked with each other on the operation mechanism so that the opening / closing valve (18) opens after the electric pump (7) is started by a series of operations by the operator (M). 2. A spray nozzle (6), an electric pump (7) for pumping liquid (L) to the spray nozzle (6), and between the electric pump (7) and the spray nozzle (6). An opening / closing valve (18) for opening and closing the discharge flow path (32), an opening / closing operation member (19, 52) for the opening / closing valve (18), and a switch (20, 55) for the electric pump (7). , The opening / closing operation member (19, 52) and the switch (20,
55) and the electric sprayer, which are linked with each other on the operation mechanism so that the opening / closing valve (18) opens after the electric pump (7) is started by a series of operations by the operator (M). 3. The opening / closing operation member (19, 52) closes the opening / closing valve (18) and the switch (2).
0, 55) is turned off from the non-operation position (N), the switch (20, 55) is turned on and the electric pump (7) starts to operate, and the electric pump ( The cock device according to claim 1 or the electric spray according to claim 2, which is operable to a second operation position (P2) in which the opening / closing valve (18) is opened while 7) is operated. Machine. 4. An alarming means (100) for alarming the operator (M) that the opening / closing operation member (19, 52) has reached the first operation position (P1). ,
The cock device or the electric sprayer according to claim 3. 5. The cock device according to claim 3, further comprising holding means (45, 62) for holding the opening / closing operation member (19, 52) at least at the first operation position (P1). Electric sprayer. 6. The holding means (45, 62) is automatically operated in response to an operation of the opening / closing operation member (19, 52) from the non-operation position (N) to the first operation position (P1). The cock device or the electric sprayer according to claim 5, which operates in accordance with. 7. The opening / closing operation member (19, 52) is moved to the first operation position (P1) and the second operation position (P1).
2) is provided with holding means (45, 62) for holding the opening / closing operation member (19, 5).
2) Automatically actuated according to the operation from the non-operation position (N) to the first operation position (P1),
The automatic operation mechanism according to an operation of the opening / closing operation member (19, 52) from the first operation position (P1) to the second operation position (P2). The described cock device or electric sprayer. 8. The inlet (22) of the electric pump (7)
A tank (5) communicating with the tank, and a stirring means (25, 26) for stirring the liquid (L) in the tank (5) by operating the electric pump (7). The electric sprayer according to any one of 2 to 7. 9. The electric pump (7), wherein the stirring means is the electric pump (7).
Spill channel (25) for communicating the upstream side of the on-off valve (18) in the discharge channel (17) communicated with the discharge port (24) of the same with the tank (5), and the spill channel (25) A relief valve (26) interposed in the liquid flow path (25), the liquid (L) being returned from the spillway channel (25) to the tank (5) with stirring. The electric sprayer according to item 8.