JP5865315B2 - Nebulizer - Google Patents

Description

  The present invention relates to a gun type sprayer that operates a valve provided in the middle of a liquid supply path to switch between a sprayed state and a stopped state.

  A sprayer used for spraying liquids such as agricultural chemicals usually has a nozzle part at the tip of the main body, and by operating a valve provided in the middle of the liquid supply path to the nozzle part The spray state and the stop state are switched.

  For example, in a gun (pistol) type sprayer in which a gripping portion is provided on the rear end side of a cylindrical main body so as to protrude from the outer periphery, a valve body is used as an opening / closing mechanism that opens and closes a liquid supply path by operating the valve body A valve closing spring that urges the valve in the closing direction is provided, a lever connected to the valve body is rotatably attached to the main body, a locking piece such as a ring is provided on the lever, and the locking piece is hung In many cases, a portion provided on the grip portion is employed (see, for example, Patent Document 1). According to this opening / closing mechanism, the operator grips the lever together with the grip portion against the elasticity of the valve closing spring, moves the valve body in the opening direction, and hooks the locking piece of the lever on the locking portion. Thus, the liquid can be sprayed while holding the lever with the liquid supply path opened. When the locking piece is removed from the locking portion, the lever returns to the initial position by the elasticity of the valve closing spring. The valve body moves in the closing direction, the liquid supply path is closed, and spraying can be stopped.

JP 2010-110717 A

  By the way, in the gun type sprayer having the conventional opening / closing mechanism as described above, when stopping spraying during the spraying operation, the holding piece is held with one hand and the locking piece is held with the other hand. It will be removed from the locking part. For this reason, when frequently switching between the sprayed state and the stopped state, an operation with both hands is required every time the spraying is stopped, and the operator often feels troublesome.

  Then, this invention makes it a subject to provide the gun type sprayer which can perform spray stop operation easily.

  In order to solve the above-described problems, the present invention provides a main body having a nozzle portion at the front end and a gripping portion on the rear end side, and a valve body provided in the middle of a liquid supply path to the nozzle portion of the main body. And an opening / closing mechanism that opens and closes the liquid supply path by operating the valve body, wherein the opening / closing mechanism is rotatable to a valve closing spring that biases the valve body in a closing direction, and to the main body A main lever attached to the main lever, a locking piece rotatably attached to the main lever, a locking part provided on the main body, and a direction in which the locking piece abuts the locking part. A biasing spring, and a sub-lever attached to the main body or the main lever so that a central portion of the main spring or the main lever can be rotated, and by rotating the main lever from the initial position toward the gripping portion, The valve body resists the elasticity of the valve closing spring. The liquid supply path is opened, and the locking piece is locked to the locking portion, so that the main lever is held while pressing the valve body. , The sub lever rotates the locking piece against the elastic force of the locking spring to remove it from the locking portion, and the main lever is initialized by the elastic force of the valve closing spring. The valve was returned to the position, and the valve body moved in the closing direction so that the liquid supply path was closed.

  According to the above-described configuration, the main lever attached to the main body is rotated from the initial position toward the gripping portion, so that the main lever keeps pressing the valve body, that is, the liquid supply path is kept open. The operation of releasing the locked state, returning the main lever to the initial position, and closing the liquid supply path can be performed by rotating the main lever or the sub lever attached to the main lever in a predetermined direction. The spray start operation and the spray stop operation can be easily performed only with the hand of the person holding the hand.

  Here, the locking piece and the sub-lever may be arranged so that the other end of the sub-lever rotates the locking piece when one end of the sub-lever is operated in a direction approaching the gripping part. desirable. When performing spray stop operation (cancellation of the locked state) with only the hand holding the gripping part, operate closer to the gripping part than to operate (push) one end of the sub lever away from the gripping part. This is because it is easier to do (pull).

  Further, the sub lever is pivotally attached to the main lever with one end projecting from the main lever to the front end side of the main body, and the one end of the sub lever is attached to the main lever in the initial position. When operated in a direction approaching the gripping portion, the other end of the sub lever rotates the locking piece, and then the rotation of the sub lever relative to the main lever is restricted, and the main lever is integrated with the sub lever. If the sub lever is pulled together with the main lever, spraying is performed while the locking piece is disengaged from the locking portion, and spraying is stopped simply by releasing the pulled sub lever. Therefore, the operability when the spraying time per time is short is greatly improved.

  As described above, the sprayer of the present invention is in a locked state in which the liquid supply path is held open by rotating the main lever from the initial position. When the sub lever is rotated in this locked state, the main lever is Since the liquid supply path is closed after returning to the initial position, the spray start operation and the spray stop operation can be easily performed only with the hand holding the gripping part. When switching is performed frequently, the operability can be greatly improved.

Front view of the sprayer of the embodiment 1 is a longitudinal sectional view of the sprayer of FIG. 1 is a perspective view of the main part of FIG. Fig. 1 is an enlarged vertical sectional view of a main part of the sprayer in the locked state in Fig. 1. Explanatory drawing of the operation | movement which cancels | releases the locked state of the sprayer of FIG. Explanatory drawing of the 1st step of the operation | movement which sprays, without being in a locked state with the sprayer of FIG. Explanatory drawing of the second step of the above operation

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the sprayer includes a cylindrical main body 1, a nozzle portion 2 provided at the front end of the main body 1, and a gripping portion extending obliquely rearward from the outer peripheral surface on the rear end side of the main body 1. 3 and holding the main lever 5 of the opening / closing mechanism 4 together (with the main lever 5 pulled) in a state where a hose (not shown) for supplying liquid is connected to the lower end of the holding portion 3. This is a gun type that ejects liquid from the nozzle part 2. Then, by rotating the adjustment knob 7 connected to the rotation shaft 6 in the main body 1, the liquid ejection amount can be adjusted. A cylindrical hood 8 that covers the radially outer side of the nozzle portion 2 is attached to the distal end side of the main body 1.

  In the main body 1, a liquid supply path 9 to the nozzle portion 2 is formed between an inner peripheral surface of the main body 1 and the rotary shaft 6, and a flow rate adjusting valve 10 is provided in the middle of the liquid supply path 9. Further, a male screw member 11 fitted and fixed to the outer periphery of the rotary shaft 6 on a female screw 1 a provided on the inner peripheral surface on the rear end side of the main body 1 and a lid for closing the rear end opening of the main body 1 through the rotary shaft 6. The member 12 is screwed.

  The flow control valve 10 includes an annular valve seat 13 provided on the inner peripheral surface of the main body 1 and a conical valve body 14 provided at the tip of the rotary shaft 6. When the adjusting knob 7 is rotated to rotate the rotating shaft 6, the rotating shaft 6 moves in the axial direction due to the screw connection between the male screw member 11 on the outer periphery of the rotating shaft 6 and the female screw 1 a on the inner peripheral surface of the main body 1. The distance between the valve body 14 and the valve seat 13 at the tip thereof (the opening degree of the valve body 14) changes so that the flow rate of the liquid sent to the nozzle unit 2, that is, the liquid ejection amount can be adjusted. .

  The nozzle portion 2 has a cylindrical flow straightening core 15 inserted into the liquid supply passage 9 on the tip side of the flow rate adjustment valve 10 in the main body 1, and a conical injection plate 17 with a cap 16 screwed to the main body 1. Is fixed to the tip of the rectifying core 15, and the liquid is ejected from an ejection port 17 a provided at the center of the ejection plate 17.

  The grip portion 3 is formed integrally with the main body 1, and a part of the liquid supply path 9 is passed through the inside thereof. A cylindrical hole 9 a is formed in the middle of the liquid supply path 9 in parallel with the main body 1, and an opening / closing valve 18 is provided in the cylindrical hole 9 a. The cylindrical hole portion 9 a is opened on the rear surface (the surface on the rear end side of the main body 1) of the grip portion 3, and the opening is closed with a lid member 19.

  The on-off valve 18 includes an annular valve seat 20 provided on the inner peripheral surface of the cylindrical hole 9a, and a truncated cone-shaped valve body 21 that is held in contact with and separate from the valve seat 20. The valve body 21 is urged in a direction (closed direction) to be pressed against the valve seat 20 by a valve closing spring 22 provided between the valve body 21 and the lid member 19. As the valve closing spring 22, a coil spring into which a protruding shaft provided on the large diameter side end surface of the valve body 21 is inserted is used. Further, the rear end portion of the interlocking shaft 23 with the tip portion protruding from the front surface of the grip portion 3 (surface on the tip side of the main body 1) is inserted and fixed to the end surface on the small diameter side of the valve body 21. The interlocking shaft 23 extends in the opening / closing direction of the valve body 21 and is slidably supported by a cylindrical support member 24 screwed into a concave portion on the front surface of the gripping portion 3. The interlocking shaft 23 and the valve body 21 are integrally formed. The main lever 5 is pressed to move in the opening direction.

  Further, a locking portion 25 is provided on the front surface of the grip portion 3 so as to protrude downward from a portion into which the support member 24 is screwed and constitutes a part of the opening / closing mechanism 4 as will be described later.

  In addition to the main lever 5, the valve closing spring 22, and the locking portion 25 of the grip portion 3, the opening / closing mechanism 4 includes a locking piece 26 rotatably attached to the main lever 5 and a locking piece 26. A coil-shaped locking spring 27 urged in a direction to contact the locking portion 25 and a sub-lever 28 rotatably attached to the main lever 5 are provided, and a valve body 21 of the on-off valve 18 is described later. Is used to open and close the liquid supply path 9.

  As shown in FIGS. 3 and 4, the main lever 5 has a first shaft pin 29 at a position where a pair of mounting portions 5 a formed at the upper end are adjacent to the upper end of the grip portion 3 on the front end side of the main body 1. The other portion is an operation portion 5b formed in a substantially U-shaped plane cross section. The operating portion 5b is provided with a pressing portion 5c that protrudes rearward from the front wall. When the operating portion 5b rotates in a direction approaching the grip portion 3 from the initial position, the pressing shaft 5 and the valve body 21 are moved by the pressing portion 5c. The valve is integrally pressed against the elasticity of the valve closing spring 22. In addition, a window 5d through which a part of the sub lever 28 passes is formed below the pressing portion 5c in the operation portion 5b.

  The locking piece 26 is a circle-shaped contact portion 26 a that is rotatably mounted by the second shaft pin 30 inside the U-shaped cross section of the main lever 5, and a circle that contacts the locking portion 25 of the grip portion 3. The columnar contact portions 26b are arranged in parallel to each other, and both ends thereof are connected by a pair of connecting plates 26c extending in the respective radial directions. When the locking piece 26 approaches the gripping part 3 integrally with the operation part 5b of the main lever 5, the locking part 25 of the gripping part 3 enters between the mounting part 26a and the contact part 26b. It has become.

  A concave portion 26d is formed at the axial center of the mounting portion 26a of the locking piece 26, and a locking spring 27 is accommodated in the concave portion 26d in a posture in which the axial direction is parallel to the mounting portion 26a. And the 2nd axial pin 30 which penetrates the attaching part 26a to an axial direction is also passed through the latching spring 27 accommodated in the recessed part 26d, and is supporting the latching spring 27. FIG. One end of the locking spring 27 is pressed against the front wall of the operation portion 5 b of the main lever 5, and the other end is pressed against the mounting portion 26 a of the locking piece 26 to grip the contact portion 26 b of the locking piece 26. The urging force is applied in the direction in which the locking portion 25 of the portion 3 comes into contact. The mounting portion 26 a of the locking piece 26 is provided with a bulging portion 26 e that bulges radially outward over the entire axial length, and this bulging portion 26 e is in contact with the sub lever 28.

  The sub-lever 28 is formed in a substantially wedge shape, and a central portion thereof is rotatably attached to the main lever 5 by a third shaft pin 31, and one end portion 28 a is opened from the window 5 d of the operation portion 5 b of the main lever 5. The main body 1 protrudes toward the distal end side, and the other end portion 28 b is in contact with the bulging portion 26 e of the mounting portion 26 a of the locking piece 26. As a result, when the one end 28 a rotates in a direction approaching the grip portion 3, the other end 28 b rotates the locking piece 26 against the elasticity of the locking spring 27.

  Further, on both side surfaces of the sub lever 28, a pair of cylindrical portions 28c projecting from the periphery of the hole through which the third shaft pin 31 is passed, and a pair of columnar projections 28d parallel to the cylindrical portion 28c are provided. . The cylindrical portion 28c is in sliding contact with the side wall of the operation portion 5b of the main lever 5 at its end face, and restricts the movement of the sub lever 28 along the axial direction of the third shaft pin 31. Abutting against the front wall of the operation portion 5 b of the lever 5, the rotation of the one end portion 28 a of the sub lever 28 in a direction away from the grip portion 3 is restricted. A number of V-shaped grooves extending in the width direction are formed on the front surface of the sub-lever 28 in order to facilitate operation with a finger.

  This sprayer has the configuration as described above. Next, the switching operation between the sprayed state and the stopped state will be described.

  1 and 2, the main lever 5 of the opening / closing mechanism 4 is in the initial position, and the valve body 21 of the opening / closing valve 18 is pressed against the valve seat 20 by the elasticity of the valve closing spring 22 to close the liquid supply path 9. The state, ie, the state where the spraying of the sprayer is stopped (stopped state) is shown. At this time, the contact portion 26 b of the locking piece 26 is pressed against the locking portion 25 of the grip portion 3 without being caught by the elastic force of the locking spring 27. Further, the sub lever 28 abuts against the mounting portion 26a of the locking piece 26, and the projections 28d on both side surfaces abut against the front wall of the operation portion 5b of the main lever 5, thereby restricting the rotation and maintaining a certain posture. Is held by.

  When the gripper 3 and the main lever 5 are grasped together (pulling the main lever 5) from the stopped state shown in FIGS. 1 and 2, the main lever 5 is rotated from the initial position toward the gripper 3 side. 4, the pressing portion 5c of the operation portion 5b presses the interlocking shaft 23 and the valve body 21 integrally against the elasticity of the valve closing spring 22 to move in the opening direction, and the liquid supply path 9 Will open and spray. At the same time, the contact portion 26b of the locking piece 26 attached to the main lever 5 moves rearward from the locking portion 25 of the grip portion 3, and the mounting portion 26a of the locking piece 26 and the contact portion The locking part 25 enters between 26b. As a result, the abutment portion 26b of the locking piece 26 is hooked on the locking portion 25, and the main lever 5 is held while pressing the interlocking shaft 23 and the valve body 21, that is, the lock that is held with the liquid supply path 9 open. Therefore, even if the hand is released from the main lever 5 or the main lever 5 is pulled strongly, the spraying is continued.

  When the one end portion 28a of the sub lever 28 is operated in the direction approaching the grip portion 3 during the spraying in the locked state described above (when the sub lever 28 is pulled), the other end portion 28b of the sub lever 28 is moved as shown in FIG. The locking piece 26 is rotated against the elastic force of the locking spring 27, whereby the contact portion 26 b of the locking piece 26 is detached from the locking portion 25 and the locked state is released. Accordingly, when the hand is released from the sub-lever 28 after that, the main lever 5 returns to the initial position by the elasticity of the valve closing spring 22, and the valve body 21 moves integrally with the interlocking shaft 23 in the closing direction, and the liquid supply path 9. Closes and spraying is stopped. At the same time, the locking piece 26 and the sub-lever 28 rotate in the opposite direction to when the sub-lever 28 is pulled by the elastic force of the locking spring 27 and return to the stopped state (the state shown in FIGS. 1 and 2).

  On the other hand, when the sub lever 28 is pulled in the above-described stop state (with the main lever 5 in the initial position), first, the other end 28b of the sub lever 28 is moved to the locking spring 27 as shown in FIG. By rotating the locking piece 26 against resilience, the contact portion 26 b of the locking piece 26 is separated from the locking portion 25. Thereafter, when the central portion of the sub lever 28 comes into contact with the contact portion 26b of the locking piece 26, the rotation of the sub lever 28 relative to the main lever 5 is restricted. In this case, the rotation restriction of the sub lever 28 may be performed when the bulging portion 26 e of the locking piece 26 contacts the front wall of the main lever 5.

  When the sub lever 28 is further pulled from the state of FIG. 6, the main lever 5 rotates from the initial position to the grip portion 3 side together with the sub lever 28 and is pressed by the main lever 5 as shown in FIG. 7. The interlocking shaft 23 and the valve body 21 are integrally moved in the opening direction, the liquid supply path 9 is opened, and spraying is started. However, at this time, unlike the state shown in FIG. 4, the contact portion 26 b of the locking piece 26 is disengaged from the locking portion 25, so that the locked state is not achieved (during the unlocking shown in FIG. 5). The same as the state). Therefore, when the hand is released from the sub-lever 28 after this, it returns to the stop state in the same manner as when the lock state is released.

  As described above, when the main lever 5 is pulled from the stopped state, the sprayer enters a locked state in which the liquid supply path 9 is kept open, and spraying starts. When the sub lever 28 is pulled in this locked state, the sprayer starts. The locked state is released, the main lever 5 returns to the initial position, the liquid supply path 9 is closed, and the spraying is stopped. That is, the spray start operation and the spray stop operation can be easily performed only with the hand holding the grip portion 3. When frequently switching between the spray state and the stop state, the spray stop operation is performed with both hands. The operability can be greatly improved as compared with the conventional one that needs to be performed. During spraying, the locked state is not released even if the hand is released from the main lever 5 or if the main lever 5 is pulled strongly. Therefore, care is taken about how the main lever 5 and the grip portion 3 are gripped and how strong the grip is. You can work easily without having to.

  Further, when the sub lever 28 is pulled from the stop state and rotated together with the main lever 5, spraying is performed while the sub lever 28 is pulled together with the main lever 5, and spraying is stopped only by releasing the sub lever 28 being pulled. Therefore, when the spraying time per time is short, particularly excellent operability can be obtained.

  Note that the locking piece and the sub-lever of the opening / closing mechanism are locked when the other end of the sub-lever rotates the locking piece when one end of the sub-lever is operated away from the gripping part (when pressed). It can also be arranged to be released. However, as in the above-described embodiment, the arrangement in which the locked state is released by operating (pulling) one end portion of the sub-lever in the direction approaching the gripping portion can be operated more easily and can be stopped. An operation method in which spraying is performed by pulling the sub-lever from is also possible.

  Moreover, although the sub lever was attached to the main lever in the embodiment, it can also be attached to the main body or its grip.

DESCRIPTION OF SYMBOLS 1 Main body 2 Nozzle part 3 Grip part 4 Opening / closing mechanism 5 Main lever 7 Adjustment knob 9 Liquid supply path 10 Flow control valve 18 Opening / closing valve 20 Valve seat 21 Valve body 22 Valve closing spring 23 Interlocking shaft 25 Locking part 26 Locking piece 27 Locking spring 28 Sub-lever 29, 30, 31 Axial pin

Claims (2)

A main body having a nozzle part at the front end and a gripping part on the rear end side, a valve body provided in the middle of the liquid supply path to the nozzle part of the main body, and operating the valve body to open the liquid supply path In a sprayer equipped with an opening and closing mechanism that opens and closes,
The valve body is provided in the middle of the liquid supply path in the gripping part, and is integrated with an interlocking shaft that protrudes the tip part from the surface of the gripping part on the tip side of the main body,
The opening / closing mechanism includes a valve closing spring that urges the valve body in a closing direction, a main lever that is rotatably attached to the main body, and a locking piece that is rotatably attached to the main lever, a locking portion which projects downwardly from a portion for supporting the interlocking shaft of the gripping portion, a locking spring for biasing the locking piece in a direction to abut against the locking portion, the center before texture Inreba And a sub-lever attached to the part so as to be rotatable,
By rotating the main lever from the initial position toward the gripping portion, the main lever presses the interlocking shaft and the valve body together against the elasticity of the valve closing spring to move in the opening direction. The liquid supply path is opened and the locking piece is locked to the locking portion, and the main lever is in a locked state that is held while pressing the valve body,
By rotating the sub lever in the locked state in a direction in which one end of the sub lever approaches the gripping portion, the other end of the sub lever resists the elasticity of the locking spring and moves the locking piece in a direction opposite to the sub lever. The main lever is returned to the initial position by the elasticity of the valve closing spring, and the valve body moves integrally with the interlocking shaft to close the liquid supply path. A sprayer characterized by being made as described above. The sub lever is pivotally attached to the main lever with one end projecting from the main lever toward the front end side of the main body, and the one end of the sub lever is gripped with the main lever in the initial position. When the second lever is operated in a direction approaching the portion, the other end of the sub lever rotates the locking piece, and then the rotation of the sub lever with respect to the main lever is restricted, and the main lever is integrated with the sub lever. The sprayer according to claim 1 , wherein the sprayer is configured to rotate toward the side of the sprayer.

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