JP3647574B2 - Liquid jet pump - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a liquid jet pump.
[0002]
[Prior art]
As a liquid ejection pump, a so-called depressing head type pump configured to eject liquid from a nozzle hole of a head by an action of an internal pump mechanism by depressing a depressing head at an upper end is known.
Examples of these include, for example, a cylinder in which the upper end is fixed by a mounting cap fitted to the container body neck and neck and the lower part is suspended in the container body, and an annular piston fitted in the cylinder so as to be movable up and down. A stem that protrudes from the outer periphery of the lower end and can be moved up and down, and has a stem with the upper end protruding above the cylinder and a push-down head with a nozzle fitted to the upper end of the stem. Discharge valves are provided in the inner upper part, and a vertically moving member consisting of a stem and a pressing head is always urged upward by a coil spring, and the vertically moving member is pushed down against the urging of this spring, thereby Pressurize the liquid and open the discharge valve to eject the liquid from the nozzle. When the head is released, the spring moves up and down the cylinder, and the cylinder There negative pressure to the discharge valve is closed, and the container body of the liquid by the suction valve opens and as configured introduced into the cylinder.
[0003]
[Problems to be solved by the invention]
This type of conventional pump often uses metal for some of its components. For example, a ball valve element constituting a suction valve, a discharge valve, or a coil spring that urges a vertically moving member upward is made of metal. Forming. However, in recent waste disposal circumstances, separation processing of metal and plastic is required, and in the conventional one, this separation is extremely difficult due to the fact that the metal parts are fine and sealed inside. .
In view of such circumstances, the present invention is entirely formed of synthetic resin, eliminates the need for separation treatment, and can exhibit the same excellent function as the conventional product in the pump function. The present invention proposes an excellent liquid jet pump that does not leak liquid while reducing the cost as much as possible.
[0004]
[Means for Solving the Problems]
As a first means, a mounting cap 2 to be fitted to the container body neck 9 and a bottomed cylindrical shape in which the upper part is fixed to the container body neck 9 by the cap and the lower end is suspended in the container body, A support tube 3 having a valve opening 14a in the bottom wall 12 and a lower end outer periphery of the support tube 3 are liquid-tightly fitted and fixed to the lower end of the support tube so that the bellows tube 24 can be extended and retracted. A valve member 4 with a bellows tube, in which a valve body 26 is integrally extended through a coil spring 25 extending from a lower end edge, and the valve port 14a is closed by the valve body to form a suction valve 27. A stem 5 formed by connecting a lower end to the upper end of the bellows tube so as to be movable up and down, projecting an upper end above the support cylinder 3 and forming a discharge valve 31 therein, and an upper end of the stem And a push-down head 7 with a nozzle 6 fitted and fixed to the Form was.
[0005]
As a second means, in the first means, a detent mechanism A is provided between the stem 5 and the support cylinder 3 so that the stem can be moved up and down and prevented from rotating. 7 is fitted to the outer periphery of the upper end of the stem 5 in a fluid-tight and rotatable manner, and the communication hole 37 drilled in the upper portion of the stem 5 and the nozzle base end opening are communicated with each other by the rotation of the head 7 with respect to the stem 5. 6 was opened and closed .
[0006]
As a third means, in the first means or the second means , a spacer 41 is detachably provided at the lower part of the head while the head 7 is pulled up.
[0007]
As a fourth means, in the first to third means, the valve body 26 of the suction valve 27 is in pressure contact with the valve seat 14 to close the valve port 14a; And a rod-like portion 26b provided with a vertically concave groove 28 for liquid circulation around the lower surface of the main body, and a locking projection 29 protruding from the lower outer periphery. The valve body 26a closes the valve opening. From the state, the valve body 26 is provided so as to be movable up and down while the locking projection 29 is engaged with the downward stepped portion 30 provided below the valve port .
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The liquid jet pump 1 of the present invention is formed entirely of synthetic resin, and includes a mounting cap 2, a support cylinder 3, a valve member 1 with a bellows cylinder, a stem 5, and a push-down head 7 with a nozzle 6 as main members. As prepared.
[0009]
The mounting cap 2 is used to fix and attach the support cylinder 3 to the container body 8 by fitting it into the mouth and neck portion 9 of the container body 8, and thus to attach and fix the entire pump to the container body. A flange-like top wall 11 is extended inward from the upper edge of the peripheral wall 10 to be screwed to the container body neck 9.
[0010]
The support cylinder 3 has a bottomed cylindrical shape with an upper end opening formed by standing a peripheral wall 13 from the periphery of the bottom wall 12, and has a valve port in the center of a valve seat 14 for a suction valve formed in the center of the bottom wall 12. 14a is opened, and a flange 15 is projected outward from the upper outer periphery of the peripheral wall 13. Then, the lower end portion is inserted into the container body, the flange 15 is placed on the upper surface of the container body neck portion 9 via the packing 16, and the upper surface of the flange 15 is pressed and locked by the top wall 11 of the mounting cap 2. Further, in order to fix a bellows tube, which will be described later, in a retractable manner, the lower end portion of the peripheral wall 13 is configured as a reduced diameter portion 13a via a tapered portion that reduces the diameter downward. Further, a fitting cylinder portion 17 for fitting a pipe is suspended from the back surface of the bottom wall 12.
[0011]
In the present embodiment, the mounting cap 2 is mounted so as to be freely rotatable with respect to the support cylinder 3, and only the mounting cap 2 is rotated after the support cylinder 3 is inserted into the container, thereby mounting cap. 2 is configured so as to be fitted to the container body neck 9. The mounting cap 2 is prevented from coming off by a locking member 18 fitted to the upper end of the support cylinder 3.
[0012]
The locking member 18 has a flange-like top wall 20 extending inwardly from the upper end edge of the fitting tube 19 fitted on the outer periphery of the upper end of the peripheral wall 13 of the support tube 3 via a concave and convex engaging means. A cylindrical portion 21 is integrally connected to the inner peripheral edge portion of the outer surface in the vertical direction, and the lower outer surface of the cylindrical portion 21 is liquid-tightly fitted to the upper portion of the inner surface of the peripheral wall 13 of the supporting cylinder 3. A detent 22 constituted by the engagement of the vertical ridges or the like is provided at a position opposite to the upper end of the inner surface of the peripheral wall 13 so as to be non-rotatably fitted. The fitting cap 19 prevents the mounting cap 2 from coming out. In addition, the outer surface of the lower end of the cylinder portion 21 is reduced in diameter to form a gap with the support cylinder peripheral wall 13, and a through hole 23 is formed in the support cylinder peripheral wall 13 to prevent negative pressure in the container body. Has been established.
[0013]
The support cylinder 3, the locking member 18 and the mounting cap 2 are formed separately, but they may all be formed integrally, or the mounting cap may be attached to the support cylinder without providing a locking member. It may be formed by fitting and fixing, and in such a case, when the mounting cap is screwed, the whole is mounted while rotating.
[0014]
A valve member 4 with a bellows tube is mounted in the support tube 3. The valve member 4 has a lower end outer periphery fitted and fixed to the inner peripheral lower part of the support cylinder 3 in a liquid-tight manner to erect the bellows tube 24 so as to be extendable and retracted via a coil spring 25 extending from the lower end edge of the bellows tube. The valve body 26 is integrally extended, and the valve port 14a is closed by the valve body to form the suction valve 27.
[0015]
In the present embodiment, the bellows tube 24 whose lower end portion is liquid-tightly fitted and fixed to the inner surface of the upper end portion of the reduced diameter portion 13a of the support cylinder 3 is erected upward. Therefore, a gap is provided between the outer peripheral surface of the bellows tube 24 and the support cylinder peripheral wall 13 so that the bellows tube 24 does not get caught even if the bellows tube 24 contracts and spreads outward, so that it can freely contract. Further, a spiral coil spring 25 having a diameter that gradually decreases from the lower end edge of the bellows tube 24 is extended, and a valve element 26 is extended to the lower end thereof. A plurality of the coil springs 25 are provided at predetermined intervals in the circumferential direction at the lower end edge of the bellows tube 24. The valve body 26 includes a valve body 26a that presses on the valve seat 14 around the valve port 14a and closes the valve port 14a, and is suspended from the lower surface of the body, and has a vertical concave groove for liquid circulation around the valve body 26a. 28, and a rod-like portion 26b having a locking projection 29 protruding from the lower outer periphery. In this embodiment, a dish-shaped valve main body 26a and a rod-shaped portion 26b having a cross-shaped cross section from the lower surface of the main body are suspended, and locking projections 29 are provided on the front, rear, left and right of the rod-shaped portion 26b. The valve body 26 is provided so as to be movable up and down from the closed state of the valve port 14a until each locking projection 29 is engaged with the downward stepped portion 30 provided below the valve port 14a. The valve body 26 is configured to prevent the inconvenience that the valve body 26 rises too much and does not return to the original state.
[0016]
Above the bellows tube 24, a stem 5 and a push-down head 7 supported so as to be movable up and down are provided.
The stem 5 communicates with the inside of the bellows tube 24 and the inside of the support tube 3 below the bellows tube, and is a conduit for introducing the liquid therein into the push-down head 7 above. The lower end portion is liquid-tightly fitted and fixed to the outer periphery of the upper end of the bellows tube 24, and the upper end protrudes above the locking member 18 so as to be vertically movable.
A discharge valve 31 is provided in the upper part of the stem 5. The discharge valve 31 is configured such that a valve body 33 is placed on a valve seat 32 projecting from the upper part in the stem so that the valve port 32a is closed and can be moved up and down. The valve body 33 is made of a synthetic resin, and as shown in FIG. 1, has a cylindrical shape in which the upper and lower surface peripheral portions are chamfered in a tapered shape, and a recess is formed in the central portion of the upper and lower surfaces. The discharge valve element may be a ball valve element made of synthetic resin.
[0017]
Further, in this embodiment, the stem 5 is slightly rotated by providing a detent mechanism A that allows the stem to move up and down and prevents rotation between the lower end outer periphery of the stem 5 and the inner surface of the support cylinder peripheral wall 13. The nozzle hole is configured so as not to rotate with respect to the support cylinder 3, and is configured to be able to open and close the nozzle hole in conjunction with a structure of a push-down head described later. In this embodiment, as shown in FIG. 2, a plurality of protrusions 34 protrude from the lower end of the outer periphery of the stem 5 at equal intervals in the circumferential direction, while the peripheral wall 13 is formed on the inner periphery of the peripheral wall 13 of the support tube 3 from directly below the through hole 23. A plurality of vertically long ridges 35 extending to the taper portion are provided in the circumferential direction so that each protrusion 34 does not rotate except for a slight rotation between the ridges 35.
[0018]
The push-down head 7 ejects the liquid introduced from the stem 5 from the nozzle 6 at the front end, and pushes it down to operate the internal pump mechanism. In this embodiment, the push-down head 7 is liquid-tight and rotates around the upper end of the stem 5. The vertical cylinder 36 is fitted to the top, and the nozzle 6 having a base end opened at the top of the vertical cylinder 36 is projected forward, and the communication hole 37 formed at the top of the stem 5 and the nozzle base end opening are connected to the head. 7, the nozzle is opened and closed by communicating with the stem 5 by rotation.
[0019]
In the present embodiment, the vertical cylinder 36 is vertically suspended from the center of the back surface of the top wall 38, and the peripheral wall 39 is vertically suspended around the vertical cylinder 36, and from the peripheral edge of the top wall around the peripheral wall. A hanging wall 40 is suspended up to the middle position of the peripheral wall, and the nozzle 6 having a base end opened on the upper front surface of the vertical cylinder 36 extends through the peripheral wall 39 and the hanging wall 40 and protrudes to the front of the tip. Has been established.
In addition, when the base end opening of the nozzle 6 is located at a position shifted from the communication hole 37, the above-described opening and closing of the nozzle is closed liquid-tightly by the upper end of the stem 5 and the inside of the stem and the inside of the nozzle are blocked. Further, the head 7 is rotated by a predetermined angle with respect to the stem 5 so that liquid can be ejected when the communication hole 37 and the nozzle base end opening communicate with each other.
In this embodiment, the push-down head with the nozzle is configured as described above. However, as usual, the head may be fitted and fixed in a state where the nozzle and the stem communicate with each other. In that case, a nozzle cap may be provided to prevent liquid leakage.
[0020]
In this embodiment, a spacer 41 is provided. The spacer 41 is provided on the lower surface of the push-down head 7 so as to make it impossible to push down the head. In this embodiment, a handle 43 protrudes from the rear outer surface of the ring-shaped base 42 having one end opened. The base 42 is pushed down and fitted to the outer surface of the upper portion of the cylindrical portion 21 of the locking member 18 below the head 7 in a snap-fit manner. At this time, since the bellows tube 24 is locked in a state of being stretched upward, the bellows tube 24 does not sag before use for storage, transportation, etc., and the elastic restoring force during use is improved. I can do it. Further, an upward stepped portion 44 formed at the lower outer surface of the stem 5 is configured to be in close contact with the lower surface of the cylindrical portion 21 and maintain the liquid tightness of this portion.
[0021]
The pump 1 configured as described above is in a state in which the spacer 41 as shown in FIG. 1 is mounted and the base end opening of the nozzle 6 is closed when not in use such as storage and transportation. In use, the spacer 41 is pulled out, the push-down head 7 is rotated, the base end opening of the nozzle 6 is communicated with the communication hole 37, and then the push-down head is moved up and down several times to perform initial operation. Preparation is made by introducing the liquid in the container into the bellows tube 24. Next, when the push-down head is pushed down, as shown in FIG. 3, the bellows tube 24 is compressed and the pressurized liquid in the bellows tube 24 passes through the stem 5, opens the discharge valve 31, and is ejected from the nozzle 6. Next, when the pressing of the head is released, the stem 5 and the head 7 are lifted by the elastic restoring force of the bellows tube 24, and the inside of the bellows tube 24 becomes negative pressure, so that the liquid in the container body is introduced by opening the suction valve 27.
[0022]
【The invention's effect】
As described above, the liquid ejection pump according to the present invention has a bottomed cylindrical support cylinder fixed by hanging a lower end portion inside a container body with a mounting cap, and a lower end outer periphery is liquid-tightly fitted to the inner lower part of the cylinder. The bellows tube is erected so that it can be extended and contracted, and the valve body is integrally extended via a coil spring extending from the lower end edge of the bellows tube. A valve member with a bellows tube formed as a valve, a stem connected to the upper end of the bellows tube so as to be movable up and down, and a push-down head with a nozzle fitted and fixed to the upper end of the stem, Because it is made of synthetic resin, there is no metal member like the conventional product, so there is no need for separation treatment at the time of disposal, and the liquid ejection function can be performed well, and the presence of the valve member with the bellows tube With as few components as possible The effect of such a cost decrease can be attained can be exhibited.
[0023]
Also, an anti-rotation mechanism is provided between the stem and the support cylinder, and the push-down head is fitted in a fluid-tight and rotatable manner on the outer periphery of the upper end of the stem, and a communication hole and a nozzle base end opening formed in the upper part of the stem are provided. In addition to the above effects, in addition to the above effects, liquids can be prevented from leaking even if the head is accidentally pushed down, and the presence of an anti-rotation mechanism. The head can be smoothly rotated with respect to the stem.
[0024]
In addition to the above effects, in addition to the above-described effect, in addition to the above effects, the head with the head pulled up can prevent the pressing head from being inadvertently pressed down, and the bellows tube can be slightly moved from a predetermined position. It can be pulled up and locked, and the elastic restoring force of the bellows during use can be maintained better.
[0025]
In addition, the valve body of the suction valve is suspended from the lower surface of the main body of the valve body that presses on the valve seat and closes the valve port, and has a vertical concave groove for liquid circulation around it. It consists of a rod-like part with a locking projection protruding at the bottom, and provided so that it can move up and down while the locking projection is engaged with the downward stepped part provided below the valve port from the valve port closed state by the valve body In the case of a valve body, in addition to the above effects, the valve body that has been opened by hydraulic pressure does not come out of the valve hole, and the valve body is restored by the reverse of the coil spring that connects the valve bodies. There is no inconvenience that the valve cannot be returned to the closed state, and a good valve function can be exhibited.
[Brief description of the drawings]
FIG. 1 is a partially cut-out half sectional view showing an embodiment of the present invention.
FIG. 2 is a cross-sectional view of a portion of a detent mechanism of the same embodiment.
FIG. 3 is a partially cut-out half cross-sectional view when the head of the embodiment is pushed down.
FIG. 4 is a partially cut-out half cross-sectional view when the head of the embodiment is raised.
[Explanation of symbols]
2 ... mounting cap, 3 ... support tube, 4 ... valve member with bellows tube, 5 ... stem,
6 ... Nozzle, 7 ... Depressing head, 9 ... Mouth and neck, 12 ... Bottom wall, 14 ... Valve seat,
14a: Valve port, 24: Bellows tube, 25 ... Coil spring, 26 ... Valve body,
26a ... Valve body, 26b ... Rod-shaped part, 27 ... Suction valve, 29 ... Locking protrusion,
30 ... downward step, 31 ... discharge valve, 37 ... communication hole, 41 ... spacer,
A ... Anti-rotation mechanism

Claims (3)

  A fitting cap 2 to be fitted to the container body neck 9, a bottomed cylindrical shape in which the upper part is fixed to the container body neck 9 by the cap and the lower end is suspended in the container body. The bellows tube 24 is extended and extended from the lower end edge of the bellows tube by extending the bellows tube 24 so that it can extend and contract with the support tube 3 having an opening 14a and the lower periphery of the support tube being liquid-tightly fitted and fixed to the inner periphery lower part of the support tube A valve member 4 with a bellows tube, in which a valve body 26 is integrally extended through a coil spring 25, and the valve port 14a is closed by the valve body to form a suction valve 27; and the upper end of the bellows tube The lower end is connected to the support cylinder 3 so as to be movable up and down, the upper end protrudes above the support cylinder 3 and the discharge valve 31 is formed inside, and the nozzle fitted and fixed to the upper end of the stem 6 and a push-down head 7 with a stem 6 between the stem 5 and the support tube 3. A non-rotating mechanism A that can be moved downward and prevents the rotation is provided, and the push-down head 7 is fitted to the outer periphery of the upper end of the stem 5 so as to be fluid-tight and rotatable, and the communication is formed in the upper portion of the stem 5. A liquid jet pump characterized in that the hole 37 and the nozzle base end opening are communicated with each other by rotating the head 7 with respect to the stem 5 so that the nozzle 6 is opened and closed, and the whole is formed of a synthetic resin.   The liquid jet pump according to claim 1, wherein a spacer (41) is detachably provided at a lower portion of the head with the head (7) pulled up.   A valve body 26 of the suction valve 27 is pressure-contacted on the valve seat 14 to close the valve port 14a, and is suspended from the lower surface of the body. And a rod-like portion 26b with a locking projection 29 projecting from the lower outer periphery, and the locking projection 29 is formed on the downward stepped portion 30 provided below the valve port from the closed state of the valve port by the valve body 26a. 2. The liquid jet pump according to claim 1, wherein the valve body is provided so as to be movable up and down while being engaged.

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