JP2017114543A - Trigger type liquid sprayer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable continuous injection of a liquid.SOLUTION: A sprayer body 2 comprises: a connection cylinder part 30 extending forward from a vertical supply cylinder part 10; a closing plug 31 integrally formed with a main cylinder 53, for closing a front end opening of the connection cylinder part 30; a storage cylinder 90 in which a liquid having passed through the inside of the vertical supply cylinder part 10 and the inside of the connection cylinder part 30 is supplied to an interior thereof through a supply hole 95a by rearward movement of a trigger part 51; a storage plunger 91 which is disposed inside the storage cylinder 90 so as to be movable in an axial direction along a center axis O2 of the storage cylinder, moves toward one side in the axial direction and is urged toward the other side as the liquid is supplied into the storage cylinder 90; and a storage valve 32 for allowing supply of the liquid from the inside of the connection cylinder part 30 into the storage cylinder 90 through the supply hole 95a, and regulating outflow of the liquid from the inside of the storage cylinder 90 into the connection cylinder part 30 through the supply hole 95a. An injection cylinder part 11 extends forward from the storage cylinder 90.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a trigger type liquid ejector.

2. Description of the Related Art A trigger type liquid ejector that sucks up liquid from a container body and discharges it from a nozzle by operating a trigger portion extending below the nozzle is known (for example, Patent Document 1 below).
In a conventional trigger type liquid ejector, an injection cylinder portion extending toward the front is provided on an upper portion of a vertical supply cylinder portion communicating with a container body. A nozzle is attached to the distal end side of the injection tube portion. A cylinder that is operated by operating the trigger portion is disposed below the injection cylinder portion. And by operating the trigger part, the liquid can be sucked into the cylinder from the vertical supply cylinder part, and the liquid can be ejected (spouted) forward from the injection cylinder part through the nozzle.

Japanese Patent No. 3789904

  However, in the conventional trigger type liquid ejector, liquid is ejected only when the trigger portion is pulled. Therefore, for example, when the liquid is sprayed over a large area, it is necessary to repeat the operation of pulling the trigger portion many times, which is troublesome.

  This invention is made | formed in view of such a situation, The objective is to provide the trigger type | mold liquid ejector which enabled the continuous injection of the liquid.

In order to solve the above problems, the present invention proposes the following means.
The trigger type liquid ejector according to the present invention includes an ejector body mounted on a container body in which a liquid is accommodated, and an ejection hole that is disposed on the front side of the ejector body and ejects the liquid forward. And the nozzle body is disposed in front of the vertical supply cylinder, the vertical supply cylinder extending in the vertical direction, and sucking up the liquid in the container body, An injection cylinder part that guides the liquid in the supply cylinder part to the ejection hole; and a trigger part that is arranged in front of the vertical supply cylinder part in a forward-biased state so as to be movable rearwardly, to the rear of the trigger part A trigger mechanism that causes the liquid to flow from the inside of the vertical supply cylinder part to the side of the ejection hole through the injection cylinder part, and the trigger mechanism includes a main piston that moves in the front-rear direction in conjunction with the movement of the trigger part. , The internal movement with the movement of the main piston A trigger type liquid ejector comprising a main cylinder that is pressurized and depressurized and whose inside communicates with the vertical supply cylinder, wherein the ejector body extends forward from the vertical supply cylinder The connecting cylinder part formed integrally with the main cylinder, and a closing plug for closing the front end opening of the connecting cylinder part, and a supply hole communicating with the inside of the connecting cylinder part are formed. By movement, the liquid that has passed through the vertical supply cylinder and the connection cylinder is supplied to the inside through the supply hole, and is arranged in the storage cylinder so as to be movable in the axial direction along its central axis. And a storage plunger that moves toward one side of the axial direction along with the supply of the liquid into the storage cylinder and is biased toward the other side, and the inside of the connecting cylinder portion through the supply hole From A storage valve that allows the supply of liquid into the storage cylinder and regulates the outflow of liquid from the storage cylinder through the supply hole into the connection cylinder, and the injection cylinder is It is characterized by extending forward from the storage cylinder.

According to the present invention, when the trigger portion is pulled rearward in a state where it is mounted on a container body containing liquid, the main piston moves in the front-rear direction within the main cylinder, and the inside of the main cylinder is pressurized. The liquid inside is supplied into the vertical supply cylinder. The liquid is ejected from the ejection hole through the connection cylinder part, the supply hole, the storage cylinder, and the injection cylinder part, and is also stored in the storage cylinder. As the liquid is stored in the storage cylinder, the storage plunger in the storage cylinder moves toward one side in the axial direction.
In this way, each time the operation of pulling the trigger portion is performed, the storage plunger can be moved to one side in the axial direction while the liquid is ejected from the ejection hole, and the liquid can be stored (filled) in the storage cylinder. .
Then, when the operation of pulling the trigger portion is stopped, the supply of the liquid into the vertical supply cylinder portion is stopped, but the storage plunger starts to revert toward the other side in the axial direction by the biasing force acting on the storage plunger. . Thereby, the liquid with which the storage cylinder was filled is pushed out from the storage cylinder through the injection cylinder part toward the ejection hole side, so that the liquid can be continuously ejected from the ejection hole. At this time, the outflow of the liquid from the storage cylinder into the connecting cylinder is regulated by the storage valve. Therefore, the liquid can be ejected not only when the trigger part is pulled backward but also when the trigger part is not operated, and the liquid can be continuously ejected.
When the storage plunger is restored and moved toward the other side in the axial direction, if the trigger portion is not pulled again, the storage plunger moves to the other end in the axial direction of the storage cylinder, but the trigger portion is pulled before that. You can repeat the operation. In this case, the storage plunger repeats the movement toward the one side in the axial direction and the movement toward the other side with a substantially constant width, and as a whole, gradually moves toward the one side in the axial direction. Thereby, the liquid gradually accumulates in the storage cylinder.
According to the present invention, when the liquid in the storage cylinder is ejected from the ejection hole, the outflow of the liquid from the storage cylinder into the connecting cylinder portion can be regulated by the storage valve. Therefore, for example, it becomes possible to easily increase the pressure of the liquid ejected from the ejection hole through the ejection cylinder portion, and the liquid can be ejected in a suitable form.
Moreover, since the closure plug is formed integrally with the main cylinder, an increase in the number of parts can be suppressed.

  The connecting cylinder part and the storage cylinder may be arranged in parallel in the vertical direction and may include a common partition wall.

  Since the connecting cylinder part and the storage cylinder are arranged in parallel in the vertical direction and have a common partition wall, the ejector body can be downsized.

  The ejector body may be provided with a collection passage that communicates the inside of the storage cylinder and the inside of the container when the storage plunger moves to the one side.

  A recovery passage is provided in the ejector body. Therefore, when the storage plunger is sufficiently moved to one side in the axial direction and the liquid is further introduced into the storage cylinder, the liquid can be returned from the collection passage into the container. Thereby, it can suppress that the pressure in a storage cylinder becomes high too much, for example, can make it easy to prevent damage etc. of a storage cylinder.

  According to the present invention, it is possible to continuously inject liquid.

It is a longitudinal cross-sectional view which shows one Embodiment of the trigger type liquid ejector which concerns on this invention. FIG. 2 is an enlarged longitudinal sectional view of a main part including a storage cylinder constituting the trigger type liquid ejector shown in FIG. 1. FIG. 3 is an enlarged vertical cross-sectional view of the main part shown in FIG.

Hereinafter, an embodiment of a trigger type liquid ejector according to the present invention will be described with reference to FIGS. 1 to 3.
As shown in FIG. 1 and FIG. 2, the trigger type liquid ejector 1 of the present embodiment is mounted on a container body A that stores liquid, and an ejector body 2 having a vertical supply cylinder portion 10 that sucks up the liquid, An ejection hole 4 for ejecting liquid toward the front is formed, and a nozzle member 3 attached to the ejector body 2 is provided.
Each component of the trigger type liquid ejector 1 is a molded product using a synthetic resin unless otherwise specified.

  Here, in the present embodiment, the central axis of the vertical supply cylinder portion 10 is defined as an axis O1, and the container body A side is referred to as the lower side along the axis O1, and the opposite side is referred to as the upper side. One direction orthogonal to the axis O1 is referred to as the front-rear direction, and the direction orthogonal to the direction of the axis O1 and the front-rear direction is referred to as the left-right direction.

The ejector body 2 includes the vertical supply cylinder portion 10 extending in the vertical direction, the injection cylinder portion 11 disposed in front of the vertical supply cylinder portion 10, and the inside communicating with the inside of the vertical supply cylinder portion 10, It has. The ejector body 2 includes a connecting cylinder part 30, a blocking plug 31, a cylinder cylinder part 40, a storage cylinder 90, a storage valve 32, a storage plunger 91, a regulating part 98, a biasing member 33, Is further provided.
Of the front and rear directions, the direction in which the injection cylinder 11 is located with respect to the vertical supply cylinder 10 is referred to as the front side or the front, and the opposite direction is referred to as the rear or the rear.

The vertical supply cylinder portion 10 includes a top cylinder-shaped outer cylinder 12 and an inner cylinder 13 fitted into the outer cylinder 12.
The outer cylinder 12 includes a large-diameter portion 12a, a small-diameter portion 12b disposed above the large-diameter portion 12a and having a diameter smaller than that of the large-diameter portion 12a, an upper end portion of the large-diameter portion 12a, and a lower end portion of the small-diameter portion 12b. Are formed in a two-stage cylindrical shape having a diameter reduced from below to above. The upper end opening of the small diameter portion 12b is closed by the top wall portion 12d. The top wall portion 12d is provided with a seal cylinder portion 12e and a regulation protrusion 12f. Both the seal cylinder portion 12e and the restriction projection 12f extend downward from the top wall portion 12d and are disposed coaxially with the axis O1. The seal cylinder portion 12e surrounds the restriction projection 12f from the outside.

  The inner cylinder 13 includes a large-diameter portion 13a, a small-diameter portion 13b disposed above the large-diameter portion 13a and having a diameter smaller than that of the large-diameter portion 13a, an upper end portion of the large-diameter portion 13a, and a lower end portion of the small-diameter portion 13b. Are formed in a two-stage cylindrical shape having a diameter reduced from below to above. The seal tube portion 12e is fitted in the upper end portion of the small diameter portion 13b.

In the small diameter portion 13b of the inner cylinder 13, an upper portion of a pipe 15 that is disposed in the container body A and that has a lower end opening located at a bottom portion (not shown) of the container body A is fitted. The flange portion 13c of the inner cylinder 13 is positioned below the flange portion 12c of the outer cylinder 12 in a state where a clearance S1 is secured between the flange portion 12c of the outer cylinder 12 and the flange portion 12c. In the large diameter portion 13 a of the inner cylinder 13, an annular flange portion 13 d that protrudes outward in the radial direction is formed at a portion protruding downward from the large diameter portion 12 a of the outer cylinder 12. The flange portion 13d is disposed in the upper end portion of the mounting cap 14 that is mounted (for example, screwed) to the mouth portion A1 of the container body A, and locks the upper end portion of the mounting cap 14 around its axis. The collar portion 13d is sandwiched in the vertical direction by the mounting cap 14 and the upper end opening edge at the mouth portion A1 of the container body A.
In addition, the axis O1 of the vertical supply cylinder portion 10 configured by the outer cylinder 12 and the inner cylinder 13 is eccentric to the rear side with respect to the container axis of the container body A.

An annular tapered cylindrical portion 35 that protrudes inward is formed on a portion of the inner peripheral surface of the inner cylinder 13 that is positioned below the seal cylinder portion 12e and above the upper end of the pipe 15. ing.
The tapered cylindrical portion 35 is gradually reduced in diameter as it goes downward. A spherical suction valve 36 that is detachably seated on the inner peripheral surface of the tapered cylindrical portion 35 is disposed inside the tapered cylindrical portion 35. In the inner cylinder 13, the suction valve 36 communicates and blocks a space located above the tapered cylinder part 35 and a space located below the taper cylinder part 35.

The connection cylinder part 30 is extended from the vertical supply cylinder part 10 toward the front. The connecting cylinder part 30 communicates with the vertical supply cylinder part 10. The rear end portion of the connection tube portion 30 is connected to the front side of the upper end portion of the vertical supply tube portion 10. The rear end opening of the connection cylinder part 30 opens into the seal cylinder part 12e.
The closing plug 31 closes the front end opening of the connecting cylinder part 30. The blocking plug 31 is closely fitted in the connecting cylinder part 30. The blocking plug 31 is provided with a protruding portion 34 that protrudes rearward. The protruding part 34 reduces the flow path cross-sectional area of the connecting cylinder part 30.

  The cylinder cylinder portion 40 is integrally formed in a portion of the outer cylinder 12 positioned below the connection cylinder portion 30. The cylinder cylinder portion 40 protrudes forward from the outer cylinder 12 and opens forward. The cylinder cylinder portion 40 is disposed between the connection cylinder portion 30 and the flange portion 12c. The cylinder cylinder part 40 is arranged in parallel with the connection cylinder part 30 and the flange part 12c in the vertical direction. The cylinder cylinder portion 40 includes partition walls W1 and W2 common to the connection cylinder portion 30 and the flange portion 12c.

  The storage cylinder 90 is formed with a supply hole 95 a that communicates with the connection cylinder portion 30. The liquid that has passed through the vertical supply cylinder part 10 and the connection cylinder part 30 is supplied through the supply hole 95a into the storage cylinder 90 by the rearward swing (movement) of the trigger part 51 described later. The storage cylinder 90 extends in the front-rear direction and is disposed above the connecting cylinder portion 30. The connecting cylinder part 30 and the storage cylinder 90 are arranged in parallel in the vertical direction and include a common partition wall W3. The storage cylinder 90 is disposed in parallel with the connecting cylinder portion 30 and the cylinder cylinder portion 40. In the illustrated example, the storage cylinder 90 is also disposed on the vertical supply cylinder portion 10. The vertical supply cylinder part 10 and the storage cylinder 90 are provided with a common partition wall W4. The partition wall W4 is formed by the top wall portion 12d.

As shown in FIG. 2, the storage cylinder 90 includes a front wall portion 95 and a cylinder tube 96 extending rearward from the front wall portion 95, and is formed in a cylindrical shape that opens rearward.
The front wall portion 95 is provided with a mounting recess 97 and a communication hole 104. The mounting recess 97 is formed in an annular shape coaxial with the central axis O <b> 2 of the storage cylinder 90. The mounting recess 97 is formed on the rear end surface of the front wall portion 95. The communication hole 104 is disposed inside the mounting recess 97 in a front view when the front wall portion 95 is viewed from the front-rear direction. The communication hole 104 passes through the front wall portion 95 in the front-rear direction.

  The cylinder cylinder 96 is formed in a multistage cylinder shape that gradually increases in diameter from the front side toward the rear side. The cylinder cylinder 96 includes a small-diameter front cylinder part 112, a large-diameter rear cylinder part 113, and a step part 114 that connects the front cylinder part 112 and the rear cylinder part 113. The stepped portion 114 gradually increases in diameter from the front side toward the rear side. The rear cylinder portion 113 protrudes rearward from the vertical supply cylinder portion 10. The front cylinder portion 112 constitutes the partition wall W3. The step portion 114 and the front end portion of the rear cylinder portion 113 constitute the partition wall W4.

  In the cylinder cylinder 96, the supply hole 95a, the communication groove 115, and the recovery hole 116 are formed. The supply hole 95 a is provided at the front end portion of the front cylinder portion 112. The supply hole 95a penetrates the partition wall W3 in the vertical direction. The supply hole 95a exposes the protruding portion 34 upward. The communication groove 115 is provided at the rear end portion of the front tube portion 112. The communication groove 115 is provided on the inner peripheral surface of the front tube portion 112. The communication groove 115 extends in the front-rear direction and opens rearward. A plurality of communication grooves 115 are arranged at intervals around the central axis O2. The recovery hole 116 is disposed at the front end portion of the rear cylinder portion 113. The recovery hole 116 penetrates the partition wall W4 in the vertical direction. The recovery hole 116 communicates with a recovery passage 117 provided in the ejector body 2. As shown in FIG. 1, the recovery passage 117 vertically cuts the vertical supply cylinder portion 10 in the vertical direction. The collection passage 117 penetrates the small diameter portion 13b in the vertical direction and communicates with the large diameter portion 13a. The collection passage 117 communicates the collection hole 116 and the inside of the container body A.

  As shown in FIG. 2, the storage valve 32 allows the supply of liquid from the inside of the connecting cylinder portion 30 through the supply hole 95 a into the storage cylinder 90. The storage valve 32 regulates the outflow of liquid from the storage cylinder 90 through the supply hole 95a into the connecting cylinder portion 30. The storage valve 32 is a check valve. The storage valve 32 includes a valve base portion 118 and a valve body portion 119. The valve base 118 is formed in an annular shape coaxial with the central axis O2. The valve base 118 is disposed on the rear end surface of the front wall portion 95. The valve base 118 includes a mounting protrusion 120 that is mounted in the mounting recess 97. The valve body 119 is formed in a cylindrical shape that protrudes rearward from the valve base 118. The valve body 119 can be elastically deformed inward in the radial direction of the valve body 119. The rear end portion of the valve body portion 119 is detachably seated on the inner peripheral surface of the cylinder cylinder 96. The rear end portion of the valve body portion 119 is located on the rear side of the supply hole 95a. The valve body portion 119 closes the supply hole 95a so as to be opened and closed from the inside of the storage cylinder 90.

  The storage plunger 91 is disposed in the storage cylinder 90 so as to be movable in the front-rear direction (axial direction) along the central axis O2. The storage plunger 91 moves toward the rear side (one side) in the front-rear direction along with the supply of the liquid into the storage cylinder 90 and is biased toward the front side (the other side). The storage plunger 91 includes a sliding member 121 and a receiving member 122. Both the sliding member 121 and the receiving member 122 are formed in a cylindrical shape extending in the front-rear direction. The sliding member 121 is externally fitted to the receiving member 122. The sliding member 121 can be formed of a softer material than the receiving member 122, for example.

The sliding member 121 slides in the storage plunger 91 in the front-rear direction. The sliding member 121 includes a plunger cylinder 110 extending in the front-rear direction, and a closing wall 111 that closes the front end opening of the plunger cylinder 110.
The plunger cylinder 110 is formed in a multistage cylinder shape that gradually increases in diameter from the front side toward the rear side. Lip portions 124 and 125 are provided on the outer peripheral surface of the plunger cylinder 110. The lip portions 124 and 125 are formed over the entire circumference of the plunger cylinder 110 in the circumferential direction. The lip portions 124 and 125 slide closely on the inner peripheral surface of the cylinder cylinder 96 in the front-rear direction. A pair of lip portions 124 and 125 are arranged at intervals in the front-rear direction. The lip parts 124 and 125 include a first lip part 124 on the front side and a second lip part 125 on the rear side. The first lip portion 124 slides on the inner peripheral surface of the front cylinder portion 112. The second lip part 125 slides on the inner peripheral surface of the rear cylinder part 113.

The front end surface of the blocking wall 111 is in contact with the rear end surface of the valve base 118. As a result, the blocking wall 111 closes the communication hole 104. The blocking wall 111 is detachably seated on the valve base 118 toward the rear side. A convex portion 126 and a concave groove 127 are formed on the front end surface of the blocking wall 111. The protrusion 126 protrudes forward from the blocking wall 111. The convex portion 126 is disposed in the valve base 118. The concave groove 127 extends in the radial direction of the storage plunger 91. The concave groove 127 opens toward the outside in the radial direction. In a state where the front end surface of the blocking wall 111 is in contact with the rear end surface of the valve base 118, communication between the concave groove 127 and the communication hole 104 is blocked.
The rear end portion of the receiving member 122 protrudes rearward from the sliding member 121. The receiving member 122 is provided with a receiving seat portion 128. The receiving seat portion 128 protrudes from the outer peripheral surface of the receiving member 122 in the radial direction of the receiving member 122. The receiving seat portion 128 is formed in an annular shape that extends over the entire circumference of the receiving member 122 in the circumferential direction.

  The restricting portion 98 restricts the amount of movement of the storage plunger 91 to the rear. The restricting portion 98 is mounted in the rear end portion of the storage cylinder 90. The restricting portion 98 is formed in a double cylinder shape that is disposed coaxially with the central axis O2 and extends in the front-rear direction. The restricting portion 98 includes a fitting tube portion 129, a connecting seat portion 130, and an insertion tube portion 131. The fitting cylinder portion 129 is fitted in the storage cylinder 90. The connecting seat portion 130 is formed in an annular shape coaxial with the central axis O2. The outer peripheral edge portion of the connecting seat portion 130 is connected to the rear end portion of the fitting tube portion 129. The insertion tube portion 131 protrudes forward from the outer peripheral edge portion of the coupling seat portion 130. A front end portion of the insertion tube portion 131 is located in the receiving member 122. The connecting seat portion 130 faces the rear end portion of the receiving member 122 in the front-rear direction.

  The urging member 33 urges the storage plunger 91 toward the front. The biasing member 33 is disposed between the storage plunger 91 and the restricting portion 98. The front end portion of the urging member 33 is disposed on the rear end surface of the receiving seat portion 128. The rear end portion of the urging member 33 is disposed on the front end surface of the connecting seat portion 130. The urging member 33 is compressed in the front-rear direction in a state where the storage plunger 91 is located at the most advanced position described later, and urges the storage plunger 91 forward. The urging member 33 is a coil spring and is externally mounted on the rear end portion of the receiving member 122 and the insertion tube portion 131.

  As shown in FIGS. 1 and 2, the injection cylinder part 11 guides the liquid in the vertical supply cylinder part 10 to the ejection holes 4. The injection cylinder portion 11 extends forward from the storage cylinder 90. The injection cylinder portion 11 protrudes forward from the front wall portion 95. The inside of the injection cylinder part 11 is communicated with the injection cylinder part 11 through the communication hole 104, the valve base part 118, the storage cylinder 90, the supply hole 95 a and the connection cylinder part 30.

  As shown in FIG. 1, the ejector main body 2 extends downward from the injection cylinder portion 11 and is arranged to be swingable (movable) rearward in a forward biased state in front of the vertical supply cylinder portion 10. Trigger portion 51, main piston 52 that moves in the front-rear direction in conjunction with the swing (movement) of trigger portion 51, main cylinder 53 that is pressurized and depressurized as the main piston 52 moves, and trigger portion The elastic plate portion 54 that biases the front 51 forward, and the cover body 55 that covers the entire vertical supply cylinder portion 10, the injection cylinder portion 11, and the storage cylinder 90 from at least the upper side and the left-right direction are further provided.

  Further, the storage valve 32, the suction valve 36, the trigger part 51, the main piston 52, the main cylinder 53, and the elastic plate part 54 described above are configured to supply liquid vertically by swinging (moving) the trigger part 51 backward. A trigger mechanism 50 that circulates from the inside 10 to the ejection hole 4 side through the inside of the injection cylinder 11 is configured.

  The main cylinder 53 communicates with the vertical supply cylinder portion 10. The main cylinder 53 protrudes forward from the outer cylinder part 60 that opens toward the front, the rear wall part 61 that closes the rear opening of the outer cylinder part 60, and the central part of the rear wall part 61. And a piston guide 62 whose front end is closed. The main stopper 53 is formed integrally with the main cylinder 53.

The piston guide 62 is opened rearward on the inside, and a fitting protrusion 41 projecting forward from the rear wall (the small diameter portion 12b of the outer cylinder 12) of the cylinder cylinder portion 40 is provided in the opening. It is mated.
The outer cylinder part 60 is fitted inside the cylinder cylinder part 40. The inner peripheral surface of the cylinder cylinder portion 40 and the outer peripheral surface of the outer cylinder portion 60 are in close contact with each other at both ends in the front-rear direction. On the other hand, an annular gap S2 is secured in an intermediate portion located between both end portions in the front-rear direction, between the inner peripheral surface of the cylinder cylinder portion 40 and the outer peripheral surface of the outer cylinder portion 60. .

  The outer cylinder part 60 is formed with a first air vent 63 that allows the inside of the outer cylinder part 60 to communicate with the gap S2. A second ventilation hole 64 that communicates the gap S2 with the flange portion 12c of the outer cylinder 12 and the gap S1 defined between the flange portion 12c of the outer cylinder 12 and the flange portion 13c of the inner cylinder 13. Is formed. Further, the flange portion 13 c of the inner cylinder 13 is formed with a third vent hole 65 that allows the gap S <b> 1 to communicate with the large diameter portion 13 a of the inner cylinder 13 and the inside of the mounting cap 14.

A first through hole 66 penetrating in the front-rear direction is formed in the rear wall portion 61 of the main cylinder 53 at a portion located above the piston guide 62. In the illustrated example, a cylindrical portion protruding rearward is formed at the opening peripheral edge portion of the first through hole 66 in the rear wall portion 61, and this cylindrical portion is formed in the small diameter portion 12 b of the outer cylinder 12. Is fitted into the through-hole. The first through-hole 66 passes through the second through-hole 67 formed in the inner cylinder 13 of the vertical supply cylinder portion 10, and is in a space located between the seal cylinder portion 12 e and the suction valve 36 in the inner cylinder 13. Communicate.
Thereby, the inside of the main cylinder 53 communicates with the space located between the seal cylinder portion 12e and the suction valve 36 in the inner cylinder 13 through the first through hole 66 and the second through hole 67. . Accordingly, the suction valve 36 switches communication between the container body A and the main cylinder 53 and blocking of the communication.

The main piston 52 includes a columnar connecting part 70 connected to the trigger part 51, and a piston cylinder 71 located behind the connecting part 70 and having a larger diameter than the connecting part 70, and as a whole. It is formed in a cylindrical shape that opens rearward.
The main cylinder 53 and the main piston 52 are disposed on a common axis (not shown) extending along the front-rear direction.

  The piston cylinder 71 has a piston main body 72 that opens rearward and into which the piston guide 62 is inserted. The piston cylinder 71 projects outward from the rear end of the piston main body 72 in the radial direction. A sliding cylinder portion 73 that is in close sliding contact with the inner peripheral surface of the portion 60.

The piston main body 72 has an inner diameter larger than the outer diameter of the piston guide 62. In the illustrated example, there is a slight gap between the inner peripheral surface of the piston main body 72 and the outer peripheral surface of the piston guide 62.
The sliding cylindrical portion 73 is formed in a tapered shape that gradually increases in diameter from the central portion in the front-rear direction toward the front and rear, and the sliding contact portions 73 a located at both ends in the front-rear direction are the inner circumference of the outer cylindrical portion 60. Make sliding contact with the surface.

  The connecting portion 70 of the main piston 52 is connected to the trigger portion 51 via a connecting shaft 86 described later. Thereby, the main piston 52 is urged forward by the urging force of the elastic plate portion 54 together with the trigger portion 51, and moves rearward in the main cylinder 53 as the trigger portion 51 moves rearward. Pushed in.

  Further, when the trigger portion 51 is in the foremost swing position (the foremost movement position), the sliding cylinder portion 73 of the main piston 52 closes the first vent hole 63. When the main piston 52 moves backward by a predetermined amount due to the backward swing of the trigger portion 51, the sliding cylinder portion 73 opens the first vent hole 63. Thereby, the inside of the container body A communicates with the outside through the third ventilation hole 65, the second ventilation hole 64, and the first ventilation hole 63.

  The trigger portion 51 has a main plate member 80 having a front surface that is concavely curved toward the rear in a side view as viewed from the left and right directions, and a pair of side plate members 81 that stand rearward from the left and right side edge portions of the main plate member 80. And.

A pair of connecting plates 82 are formed at the upper end portions of the pair of side plate members 81 so as to extend upward to the side of the injection tube portion 11 and sandwich the injection tube portion 11 from the left-right direction. The pair of connecting plates 82 are provided with a rotating shaft portion 83 projecting outward in the left-right direction. These rotary shaft portions 83 are rotatably supported by bearing portions provided on an upper plate member 84 that covers the upper side of the injection cylinder portion 11. The upper plate member 84 is disposed on the injection cylinder portion 11 via a mounting cylinder 92 described later.
Thereby, the trigger part 51 can be swung in the front-rear direction around the rotation shaft part 83.

The trigger 51 is formed with an opening 51a penetrating the main plate member 80 in the front-rear direction, and a connecting cylinder 85 is formed so as to extend rearward from the peripheral edge of the opening 51a.
A pair of connecting shafts 86 projecting in the left-right direction toward the inner side of the connecting cylinder 85 are formed on a portion of the inner peripheral surface of the connecting cylinder 85 positioned on the rear side. These connecting shafts 86 are inserted into connecting holes formed in the connecting portion 70 of the main piston 52. Thereby, the trigger part 51 and the main piston 52 are mutually connected.

  The connecting portion 70 of the main piston 52 is connected to the connecting shaft 86 so as to be rotatable about its axis and movable by a predetermined amount in the vertical direction. Thereby, the main piston 52 can be moved back and forth as the trigger portion 51 swings in the front-rear direction.

The horizontal plate-like upper plate member 84 connected to the top wall portion 12 d of the outer cylinder 12 in the vertical supply cylinder portion 10 is attached to the upper surface of the injection cylinder portion 11.
The elastic plate portions 54 are integrally formed on both the left and right sides of the upper plate member 84 so as to be formed in an arc shape that is convex forward in a side view as viewed from the left and right directions and that extends to below the injection cylinder portion 11. Yes. The elastic plate portion 54 is formed in a circular arc shape that is concentric with each other when viewed from the side in the left-right direction, and includes a pair of leaf springs arranged in the front-rear direction.

Of the pair of leaf springs, the leaf spring located on the front side is the main leaf spring 54a, and the leaf spring located on the rear side is the sub leaf spring 54b.
The lower ends of the main leaf spring 54a and the sub leaf spring 54b are integrally connected via an arcuate folded portion 54c. A locking piece 54d projects downward from the folded portion 54c, and the locking piece 54d is inserted into and engaged with a pocket portion 81a formed in the side plate member 81 of the trigger portion 51 from above. ing.
Thereby, the elastic board part 54 is urging | biasing the trigger part 51 toward the front via the locking piece 54d and the pocket part 81a.

The upper end portion of the main plate member 80 of the trigger portion 51 is in contact with the lower end portion of a restriction wall 123 described later by the urging by the elastic plate portion 54 from the rear. Thereby, the trigger part 51 is positioned in the foremost swing position.
When the trigger portion 51 is pulled backward from the foremost swing position, the elastic plate portion 54 is elastically deformed so as to move the folded portion 54c backward via the locking piece 54d. At this time, in the elastic plate portion 54, the sub leaf spring 54b is elastically deformed larger than the main leaf spring 54a.

  Even if the trigger piece 51 is pulled rearward, the locking piece 54d is pulled upward from the pocket portion 81a until the trigger portion 51 reaches the rearmost swing position (the rearmost movement position). The engaged state with the pocket portion 81a is maintained.

  The nozzle member 3 is disposed on the front side of the ejector body 2. The nozzle member 3 includes a nozzle plate 105, a mounting cylinder 92, a restriction wall 123, an insertion part 201, a nozzle shaft part 100, and a surrounding cylinder 101.

  The front and back surfaces of the nozzle plate 105 face in the front-rear direction. The nozzle plate 105 covers the front end opening of the injection cylinder portion 11 from the front. The nozzle plate 105 is disposed at the opening edge of the front end of the injection cylinder part 11. The mounting cylinder 92 protrudes rearward from the nozzle plate 105. The mounting cylinder 92 is closely fitted on the injection cylinder portion 11. A connection hole 106 is formed in the nozzle plate 105. The connection hole 106 is disposed inside the mounting cylinder 92 in a plan view of the nozzle plate 105 viewed from the front-rear direction. The restriction wall 123 protrudes downward from the mounting cylinder 92. Since the lower end portion of the restriction wall 123 abuts against the upper end portion of the main plate member 80 of the trigger portion 51 from the front, the restriction wall 123 positions the trigger portion 51 at the foremost swing position.

  The insertion part 201 extends toward the rear. The insertion portion 201 is inserted over substantially the entire length in the front-rear direction in the injection cylinder portion 11. The insertion part 201 is inserted into the injection cylinder part 11 so as to ensure a slight gap S3 in the upper part of the internal space of the injection cylinder part 11. Thereby, the space volume in the injection cylinder part 11 can be made small. The gap S3 communicates with the connection hole 106.

The nozzle shaft portion 100 and the surrounding cylinder 101 protrude forward from the nozzle plate 105. The surrounding cylinder 101 surrounds the nozzle shaft portion 100 from the outside. The surrounding cylinder 101 slightly protrudes forward from the nozzle shaft portion 100. An annular flow passage 102 is formed between the nozzle shaft portion 100 and the surrounding cylinder 101. The nozzle shaft portion 100 is fitted with a nozzle cap 103 in which an ejection hole 4 opening forward is formed, and the flow passage 102 and the ejection hole 4 communicate with each other. The flow passage 102 communicates with the connection hole 106.
Accordingly, the inside of the storage cylinder 90 communicates with the ejection hole 4 through the communication hole 104, the injection cylinder portion 11, the connection hole 106, and the flow passage 102. That is, the communication hole 104 communicates the inside of the storage cylinder 90 and the ejection hole 4.

  Note that the position of the storage plunger 91 when the front end surface of the blocking wall 111 is in contact with the rear end surface of the valve base 118 as shown in FIG. When the storage plunger 91 is disposed at the most advanced position, the liquid is hardly contained in the storage cylinder 90 and the communication between the storage cylinder 90 and the communication hole 104 is blocked.

  As shown in FIG. 3, when the storage plunger 91 moves toward the rear side (one side in the axial direction) and the storage plunger 91 comes into contact with the restriction portion 98 from the front side (the other side in the axial direction), the storage plunger 91. Any further rearward movement is restricted. The position of the storage plunger 91 at this time is defined as the last retracted position. When the storage plunger 91 has reached the last retracted position, the rear end portion of the receiving member 122 abuts on the connecting seat portion 130, and the maximum amount of liquid is stored in the storage cylinder 90.

(Operation of trigger type liquid ejector)
Next, the case where the trigger type liquid ejector 1 comprised as mentioned above is used is demonstrated.
It is assumed that the liquid is filled in each part of the trigger type liquid ejector 1 by the operation of the trigger part 51 a plurality of times, and the liquid can be sucked up from the vertical supply cylinder part 10.

  When the trigger portion 51 is pulled backward against the urging force of the elastic plate portion 54, the main piston 52 moves backward with the rearward movement of the trigger portion 51, so that the liquid in the main cylinder 53 is allowed to flow through the first through hole 66. And, it can be introduced into the inner cylinder 13 of the vertical supply cylinder portion 10 through the second through hole 67. Then, the liquid introduced into the inner cylinder 13 pushes down the suction valve 36 to close it, and is supplied to the supply hole 95a through the connection cylinder portion 30 to push up the storage valve 32 to open it. Thereby, the liquid can be introduced into the storage cylinder 90. Then, the storage plunger 91 can be moved rearward from the most advanced position, and the communication hole 104 can be opened by separating the front end surface of the blocking wall 111 from the rear end surface of the valve base 118.

  Accordingly, the liquid can be guided to the ejection hole 4 through the communication hole 104, the injection cylinder portion 11, and the flow passage 102, and the liquid can be ejected forward from the ejection hole 4, and at the same time, the storage plunger 91 is moved backward. Can be moved toward.

  Thus, every time the trigger portion 51 is pulled backward, the liquid can be ejected from the ejection hole 4 and the storage plunger 91 is moved backward to accumulate the liquid in the storage cylinder 90 (filling). can do. As the liquid is introduced into the storage cylinder 90, the storage plunger 91 in the storage cylinder 90 moves to the rear side (one side in the axial direction) while elastically compressing and deforming the urging member 33 in the front-rear direction. Thereby, a biasing force directed from the biasing member 33 toward the front side acts on the storage plunger 91.

When the operation of pulling the trigger portion 51 is stopped and the trigger portion 51 is released, the trigger portion 51 is urged forward by the elastic restoring force of the elastic plate portion 54 and returned to the original position. The main piston 52 moves forward. Therefore, a negative pressure is generated in the main cylinder 53, and the liquid in the container body A can be sucked into the vertical supply cylinder portion 10 through the pipe 15 by this negative pressure.
Then, the newly sucked liquid pushes up the suction valve 36 to open it, and is introduced into the main cylinder 53. Thereby, it can prepare for the next injection. The storage valve 32 is closed.

At this time, although the supply of the liquid from the connecting cylinder part 30 into the storage cylinder 90 is stopped, the storage plunger 91 moves forward (to the other side in the axial direction) toward the most advanced position by the urging force of the urging member 33. Move to restore). At this time, the outflow of the liquid from the storage cylinder 90 into the connection cylinder part 30 is regulated by the storage valve 32. Thereby, the liquid accumulated in the storage cylinder 90 can be guided to the ejection hole 4 through the communication hole 104, the injection cylinder portion 11, and the flow passage 102, and the liquid can be ejected forward through the ejection hole 4.
Thus, not only when the trigger part 51 is pulled backward, but also when the trigger part 51 is not operated, the liquid can be ejected, and the liquid can be continuously ejected.

  In particular, the storage cylinder 90 is formed with a communication hole 104 that communicates with the ejection hole 4 and a supply hole 95 a that communicates with the inside of the injection cylinder portion 11, and the storage plunger 91 directly closes the communication hole 104. Therefore, the space volume (internal volume occupied by the path) of the path from the connecting cylinder part 30 to the storage cylinder 90 can be easily reduced with little restriction. Therefore, when the trigger part 51 is operated, the liquid can be immediately introduced from the connection cylinder part 30 into the storage cylinder 90, and the pressure in the storage cylinder 90 is quickly raised, and the storage plunger 91 is immediately moved backward. Easy to do. Therefore, it is possible to quickly eject the liquid while suppressing the number of priming times. Therefore, it is easy to use and has excellent operability.

  Moreover, since the space volume in the injection cylinder part 11 is made small by the insertion part 201, the pressure in the injection cylinder part 11 can be raised rapidly, and a liquid can be injected with a high injection pressure.

Further, since the storage plunger 91 directly closes the communication hole 104, the liquid is not ejected unless the internal pressure of the storage cylinder 90 exceeds a predetermined value. Therefore, the liquid can be ejected at an appropriate pressure (injection pressure) without providing a high-pressure valve or the like, and the configuration can be easily simplified. Moreover, since the pressure can be accumulated by moving the storage plunger 91 urged forward by the urging force of the urging member 33 backward, when the liquid is ejected, the liquid can be ejected with further pressure applied.
Further, it is possible to effectively suppress liquid leakage from the ejection holes 4 when not in use.

When the storage plunger 91 advances, the storage plunger 91 moves to the most advanced position (the other end in the axial direction of the storage cylinder 90) unless the operation of pulling the trigger portion 51 again is performed. You may repeat the operation of pulling.
In this case, the storage plunger 91 gradually moves backward as a whole while repeating the backward movement and the forward movement. Thereby, the liquid can be gradually stored in the storage cylinder 90. Then, by moving the storage plunger 91 to the last retracted position, for example, the liquid can be continuously ejected over a long period of time until the storage plunger 91 moves from the last retracted position to the most advanced position.

  As shown in FIG. 3, the first lip portion 124 is positioned on the communication groove 115 in the state where the storage plunger 91 is positioned at the last retracted position. At this time, the inside of the front cylinder portion 112 communicates with the collection hole 116 through the communication groove 115, and the inside of the storage cylinder 90 and the inside of the container body A communicate with each other through the collection hole 116 and the collection passage 117.

As described above, according to the trigger type liquid ejector 1 according to the present embodiment, when the liquid in the storage cylinder 90 is ejected from the ejection hole 4, the liquid from the storage cylinder 90 into the connection cylinder portion 30 is obtained. Can be regulated by the storage valve 32. Therefore, for example, it becomes possible to easily increase the pressure of the liquid ejected from the ejection hole 4 through the ejection cylinder portion 11, and the liquid can be ejected in a suitable form.
Moreover, since the closing plug 31 is formed integrally with the main cylinder 53, an increase in the number of parts can be suppressed.

Moreover, since the connection cylinder part 30 and the storage cylinder 90 are arrange | positioned in parallel with the up-down direction and are provided with the common partition W3, size reduction of the ejector main body 2 can be achieved.
A collection passage 117 is provided in the ejector body 2. Therefore, when the storage plunger 91 is sufficiently moved to the rear side and the liquid is further introduced into the storage cylinder 90, the liquid can be returned from the collection passage 117 into the container body A. Thereby, it can suppress that the pressure in the storage cylinder 90 becomes high too much, for example, can make it easy to prevent damage etc. of the storage cylinder 90.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

  The collection passage 117 may not be provided. The connection cylinder part 30 and the storage cylinder 90 do not need to be provided with the common partition wall W3. The vertical supply cylinder portion 10 and the storage cylinder 90 may not include the common partition wall W4.

  In the embodiment, the storage plunger 91 moves rearward with the supply of the liquid into the storage cylinder 90, but the present invention is not limited to this. For example, it is possible to employ a configuration in which the storage plunger 91 moves forward as the liquid is supplied into the storage cylinder 90. Furthermore, a configuration is adopted in which the central axis O2 of the storage cylinder 90 extends in a direction different from the front-rear direction, and the storage plunger 91 moves in an axial direction along the central axis O2 (a direction different from the front-rear direction). You can also.

In the above embodiment, the storage plunger 91 is restored and moved using the biasing force acting from the biasing member 33, but the present invention is not limited to this. In addition to the urging force from the urging member 33 or instead of this urging force, the following configuration may be employed. That is, the ejector body 2 is connected to the storage plunger 91, and is linked to the movement of the storage plunger 91 in the axial direction, and extends along the axial direction while the other end opening in the axial direction and the outside. It is possible to adopt a configuration including a negative pressure cylinder in which communication is blocked and the negative pressure plunger is accommodated in the axial direction so as to be movable toward one side in the axial direction. In this case, with the introduction of the liquid into the storage cylinder 90, the storage plunger 91 in the storage cylinder 90 moves toward one side in the axial direction together with the negative pressure plunger in the negative pressure cylinder. At this time, in the negative pressure cylinder, the sealed space located on the other side in the axial direction from the negative pressure plunger becomes negative pressure. Thereby, the urging | biasing force toward the other side of the said axial direction acts with respect to the negative pressure plunger and the storage plunger 91. FIG. As a result, the storage plunger 91 can be restored and moved using this biasing force.
According to this aspect, since the negative pressure in the negative pressure cylinder is used when the storage plunger 91 is reconstructed and moved, for example, even without using the biasing force acting from another member such as the biasing member 33, The storage plunger 91 can be restored and moved. Thereby, thrust can be applied to the storage plunger 91 while achieving simplification of the structure. In addition, it becomes possible to form a trigger type liquid ejector only by a synthetic resin material by not using the urging member 33.

  In the above embodiment, the trigger portion 51 is swingable backward, but it is possible to appropriately adopt a form in which the trigger portion 51 moves backward. For example, the trigger unit 51 may be slidable backward.

  In addition, it is possible to appropriately replace the constituent elements in the embodiment with known constituent elements without departing from the spirit of the present invention, and the above-described modified examples may be appropriately combined.

DESCRIPTION OF SYMBOLS 1 Trigger type liquid ejector 2 Ejector main body 3 Nozzle member 4 Ejection hole 10 Vertical supply cylinder part 11 Injection cylinder part 30 Connection cylinder part 31 Blocking plug 32 Storage valve 50 Trigger mechanism 51 Trigger part 52 Main piston 53 Main cylinder 90 Storage cylinder 91 Storage Plunger 95a Supply Hole 117 Recovery Passage A Container Body A1 Port W3 Partition

Claims (3)

An ejector body mounted on a container body containing a liquid;
A nozzle member disposed on the front side of the ejector body and having a nozzle hole formed to eject liquid toward the front;
The ejector body is
A vertical supply cylinder that extends in the vertical direction and sucks up the liquid in the container body;
An injection cylinder part disposed in front of the vertical supply cylinder part and guiding the liquid in the vertical supply cylinder part to the ejection holes;
There is a trigger part disposed in front of the vertical supply cylinder part so as to be movable rearward in a forward-biased state, and liquid is moved from the vertical supply cylinder part into the injection cylinder part by the rearward movement of the trigger part. A trigger mechanism that circulates to the ejection hole side through,
The trigger mechanism is
A main piston that moves in the front-rear direction in conjunction with the movement of the trigger portion;
A trigger type liquid ejector comprising: a main cylinder that is pressurized and depressurized in accordance with the movement of the main piston, and the inside communicates with the longitudinal supply cylinder portion;
The ejector body is
A connecting cylinder extending forward from the vertical supply cylinder,
A closure plug that is formed integrally with the main cylinder and closes the front end opening of the connection cylinder portion;
A storage cylinder in which a supply hole communicating with the inside of the connection cylinder portion is formed, and liquid that has passed through the vertical supply cylinder portion and the connection cylinder portion by the movement of the trigger portion to the rear is supplied to the inside through the supply hole. When,
The storage cylinder is movably disposed in the axial direction along the central axis thereof, and moves toward one side of the axial direction along with the supply of the liquid into the storage cylinder and toward the other side. An energized storage plunger;
A storage valve that allows liquid to be supplied from the connection cylinder through the supply hole into the storage cylinder, and restricts the liquid from flowing from the storage cylinder through the supply hole into the connection cylinder. And comprising
The trigger liquid ejector according to claim 1, wherein the injection cylinder portion extends forward from the storage cylinder.   The trigger type liquid ejector according to claim 1, wherein the connection cylinder part and the storage cylinder are arranged in parallel in the vertical direction and have a common partition wall.   The said ejector main body is provided with the collection | recovery channel | path which connects the inside of the said storage cylinder and the said container body, when the said storage plunger moves to the said one side. Triggered liquid ejector as described.

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