JP3678857B2 - 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, for example, a fixed suction part in which a cylinder is fixed in a state where the lower end is suspended into the container body by a mounting cylinder fitted to the outer periphery of the mouth and neck of the container body, and above the opening at the center of the upper end of the suction part An operating member having a push-down head with a nozzle fitted and fixed to the upper end of a stem that protrudes in a biased state so as to be movable up and down, and is configured so that liquid in the container body is sucked up and ejected from the nozzle by the vertical movement of the operating member. What is made is known. Since these perform the pump function, they are generally provided with a suction valve and a discharge valve.
[0003]
A conventional suction valve in this type of pump is known in which a ball-shaped valve element is placed on a valve seat provided at the lower end of a cylinder. In addition, recently, in order to prevent liquid dripping from the nozzle tip after liquid ejection, the upper surface of the ball valve body of the suction valve is pressed with a relatively weak coil spring, and the operation after liquid dispensing is performed. Constructed to prevent the dripping by preventing the suction valve from being opened immediately and the negative pressure in the cylinder is transmitted to the nozzle when the member is raised, and as a result, the liquid in the nozzle flows back to the cylinder. Is also known.
[0004]
[Problems to be solved by the invention]
Although the above-mentioned pump can prevent dripping well, the suction valve is constituted by a plurality of members such as a ball-shaped valve body, a coil spring, and a fixing base for supporting and locking the upper end of the spring. Since the shape of each member is also fine and unstable, there is a problem that the assembling operation is troublesome.
[0005]
In consideration of these points, the present invention provides a specially configured valve member that can be integrally formed of a synthetic resin, thereby preventing dripping and providing a suction valve that can be easily manufactured and assembled. A liquid jet pump provided with a valve member is proposed.
[0006]
Further, the present invention proposes a pump provided with a valve member that can prevent inconvenience such as deformation of the elastic plate at the time of conveyance or assembly after molding.
[0007]
[Means for Solving the Problems]
As a first means, a fixed suction part A in which the cylinder 5 is fixed in a state where the lower end is suspended in the container body by the mounting cylinder 4 fitted to the outer periphery of the mouth and neck part 3 of the container body 2, and the center of the upper end of the suction part And an operating member B having a push-down head 8 fitted with a nozzle 7 fitted on and fixed to the upper end of the stem 6 that protrudes upward and downwardly in a biased state from the opening of the nozzle, and sucks up the liquid in the container body by the vertical movement of the operating member. In the liquid ejection pump configured to eject from the nozzle, a coil spring 10 having an upper end engaged with the lower surface of the actuating member B is connected to a locking step portion 11 provided in the cylinder. The base 12 is pressed against and locked in a state where it is in contact and allows fluid to flow up and down, and is pressed against the valve seat 14 at the lower end of the cylinder 5 via an elastic plate 13 suspended from the lower surface of the base 12. By closing the valve hole so that it can be opened and closed Consist valve body 15 for forming a have included valve C, and was provided a valve member 9 which form a serpentine-shaped to the elastic plate 13 reaches the valve body 15 upper center than the base portion 12 the center of the lower surface.
[0008]
Further, as a second means, in the first means, the valve member 9 is on the locking step portion 11 formed on the inner edge of the upper surface of the locking rib 16 projecting from the lower end of the inner surface of the cylinder 5 in the circumferential direction. The lower surface of the ring portion 21 at the lower end is placed in contact with each other, and a pair of support protection walls 22 are erected at opposite positions on the upper surface of the ring portion 21, and the top plate portion 23 is placed between the upper surfaces of the support protection walls. The elastic plate 13 is suspended between the support walls 18 from the center of the back surface of the top plate portion 23, and the upper portion of the valve body 15 is inserted and supported in the ring portion 21. A valve member 9 was obtained.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in the drawings, the liquid jet pump 1 according to the present invention is a fixed suction system in which a cylinder 5 is fixed in a state where a lower end is suspended in a container body by a mounting cylinder 4 fitted to an outer periphery of a mouth neck portion 3 of the container body 2. And a working member B having a push-down head 8 with a nozzle 7 fitted and fixed to the upper end of the stem 6 projecting from the opening at the center of the upper end of the suction part. This is an improvement of a so-called depressing head type liquid ejection pump configured to suck up the liquid and eject it from a nozzle.
[0010]
In the present invention, in this type of conventional pump, a specially configured valve member 9 for forming the suction valve C is provided. The valve member 9 has a lower end of a coil spring 10 whose upper end is locked to the lower surface of the actuating member B in a state in which the peripheral surface of the lower surface is in contact with a locking step portion 11 provided in the cylinder and A valve 12 that press-contacts to a valve seat 14 at the lower end of the cylinder 5 through a base 12 that is press-fitted and locked in a state where it can be circulated, and an elastic plate 13 that is suspended from the lower surface of the base 12 so that the valve hole can be opened and closed It has a body 15. Further, the elastic plate 13 is formed in a meandering plate shape extending from the center of the lower surface of the base 12 to the center of the upper surface of the valve body 15 so as to prevent irregular deformation during compression and to obtain good durability. It is composed.
[0011]
In the embodiment shown in the drawings, the cylinder 5 has a cylindrical shape with upper and lower ends opened, a flange projecting from the upper part of the outer periphery, and a fitting cylinder portion for pipe fitting with a reduced diameter is extended to the lower end portion, The pipe 30 having the upper end fitted in the cylinder is suspended from the lower end of the container. Further, the above-mentioned locking step portion 11 is formed on each inner upper end of the locking rib 16 projecting in the circumferential direction on the inner surface of the lower end of the cylinder 5, and the upper and lower sides of the cylinder 5 are passed through the base 12 from the gap of each rib 16. The liquid can be distributed.
[0012]
In the embodiment shown in FIG. 1, the valve member 9 includes a support wall 18 having a cross-shaped cross-section standing upright at the center of the upper surface of the bottom plate 17 in which the outer peripheral edge of the lower surface is placed in contact with each of the locking step portions 11. An upper plate 19 is extended on the upper surface of the upper plate 19, and a fitting cylinder portion 20 is erected from the periphery of the upper surface of the upper plate 19 to constitute the base portion 12. Further, a valve body 15 is provided which presses against the upper surface of the valve seat 14 through a meandering plate-like elastic plate 13 suspended integrally from the bottom surface of the bottom plate 17 and closes the valve hole.
[0013]
Then, the lower end of the coil spring 10 abutted and locked to the lower end of the stem 6 of the operating member B is pressed and locked to the peripheral edge of the upper surface of the bottom plate 17 to fix the base 12 to the upper surface of the locking step 11. The operating member B is constantly biased upward. Further, the fitting cylinder portion 20 is configured to close and close by tightly fitting the lower end opening of the stem 6 in a state where the operation member B is pushed down and locked.
[0014]
Further, in the embodiment shown in FIG. 3, the base 12 abuts the lower surface of the lower ring portion 21 on the locking step portion 11, and a pair of opposed surfaces on the upper surface of the ring portion 21 are paired. It is a base 12 in which a support protection wall 22 is erected and a top plate portion 23 is bridged between the upper surfaces of the support protection walls, and the elastic plate 13 is interposed between the support protection walls 22 from the center of the back surface of the top plate portion 23. The valve member 9 is configured by inserting and supporting the upper portion of the valve body 15 in the ring portion 21.
[0015]
Further, as shown in FIGS. 4 to 6, each of the support protection walls 22 has a circular arc shape whose outer surface is substantially the same diameter as the ring outer surface and a vertical inner surface at the left and right facing positions of the ring portion 21. Each of the support walls 22a is erected, and the upper peripheral surface of each first support wall 22a has an outer peripheral edge substantially the same diameter as the outer surface of the ring portion 21 and has a larger area than the upper surface of the first support wall 22a. Each part 22b is extended, and each horizontal plate part 22b is provided with a small-diameter semi-columnar second support wall 22c at the center of the upper surface, and a disc-shaped top plate part between the upper surfaces of the second support walls 22c. 23 is extended, and the fitting tube portion 20 is erected from the peripheral edge portion of the top plate portion.
[0016]
Here, the other parts in the above embodiments will be described.
In each embodiment, the fixed suction portion A includes the cylinder 5, the mounting cylinder member 24, and the ring cap 25.
[0017]
The mounting cylinder member 24 is configured by projecting a mounting flange inwardly from the upper end of the mounting cylinder 4, and the flange is rotatably fitted on the upper surface of the flange of the cylinder 5. The ring cap 25 that is fitted prevents the slipping out and is provided so as to be rotatable with respect to the cylinder. Then, the lower end of the cylinder 5 is inserted and suspended in the container body, and the lower surface of the flange of the cylinder 5 is brought into contact with the upper surface of the neck portion of the container body via the packing and is pressed and locked by the flange of the mounting cylinder member 24.
[0018]
The ring cap 25 is provided with a fitting cylinder 26 that is fitted on the outer periphery of the cylinder wall at the upper end of the cylinder 5 so that the lower part cannot be pulled out via the concave and convex engaging means from the peripheral edge of the ring-shaped top plate. A guide cylinder 27 for penetrating the stem 6 is suspended, and the outer surface of the guide cylinder is tightly fitted to the inner surface of the cylinder upper portion so as not to rotate.
[0019]
The stem 6 of the actuating member B is a conduit that communicates with the inside of the cylinder and introduces the liquid therein into the push-down head 8 above it. An annular piston 28 is provided above the guide cylinder 27 so as to be able to move up and down, and an outer peripheral edge is slidably fitted to the inner surface of the cylinder 5 at the outer periphery of the lower end. Further, a discharge valve D is provided in the upper part inside.
[0020]
Further, a vertical cylinder 29 is fitted to the upper end of the stem 6 to fix the push-down head 8, and a thread that engages with a thread that is provided on the inner surface of the guide cylinder 27 is provided on the outer surface of the vertical cylinder 29. The actuating member B can be locked to the fixed suction portion A when the push-down head is pushed down by screwing them together.
[0021]
An example of how to use the pump 1 configured as described above will be described. The initial operation is performed by moving the push-down head 8 up and down several times, and the liquid in the container body 2 is introduced into the cylinder 5 to prepare. Arrange. Next, when the push-down head 8 is pushed down, the pressurized liquid in the cylinder 5 passes through the stem 6, opens the discharge valve D, and is ejected from the nozzle 7. Next, when the pressing of the head 8 is released, the operating member B is raised by the action of the coil spring 10, and the inside of the cylinder 5 becomes negative pressure, so that the discharge valve D is closed, and the liquid in the container body is introduced by opening the suction valve C. . At this time, the opening of the suction valve C is delayed by the action of the elastic plate 13, and for example, the suction valve C does not open until the discharge valve D is securely closed. As a result, the liquid in the nozzle 7 flows back into the cylinder and flows from the tip of the nozzle. To prevent dripping. Further, in a state where the push-down head 8 is pushed down and locked when not in use, even if the container is inadvertently tilted, the valve member closes the lower end of the stem and prevents leakage of the liquid in the cylinder. Yes.
[0022]
Each of the above members is mainly formed of a synthetic resin, and a metal or a flexible elastomer can be used in combination as required.
[0023]
【The invention's effect】
As described above, the pump of the present invention has the above-described configuration. In particular, the lower end periphery of the operating member B is locked by the coil spring 10 whose upper end is locked to the lower surface of the operating member B. Is pressed against the valve seat 14 at the lower end of the cylinder 5 via a base 12 that is pressed against and locked in a state where the liquid can flow up and down, and an elastic plate 13 that is suspended from the lower surface of the base 12. A valve member 9 comprising a valve body 15 that closes the valve hole so as to be openable and closable is provided, so that dripping can be prevented and the valve member 9 can be integrally formed of a synthetic resin. In addition, it exhibits a unique effect that it can be easily assembled to the bottom of the cylinder.
[0024]
Further, since the elastic plate 13 is configured to have a meandering plate shape extending from the center of the bottom surface of the base 12 to the center of the top surface of the valve body 15, it is possible to prevent irregular deformation at the time of compression and to obtain good durability. Also has.
[0025]
The valve member 9 has a lower surface of the ring portion 21 at the lower end in contact with and placed on a locking step portion 11 formed on the inner surface of the upper surface of the locking rib 16 projecting in the circumferential direction at the lower end of the cylinder 5. A pair of supporting and protecting walls 22 are erected at opposite positions on the upper surface of the ring portion 21, and have a base 12 with a top plate portion 23 spanned between the upper surfaces of each supporting and protecting wall, and the back surface of the top plate portion 23. In the case where the elastic plate 13 is suspended between the support protection walls 22 from the center, and the valve body 15 is inserted and supported in the ring portion 21, the elastic plate 13 is supported by each support protection wall 22. In addition, the valve body can be prevented from greatly moving outward due to the ring part. As a result, especially during transportation, storage, etc., until the pump assembly after the valve member is molded. Inconveniences such as deformation of the elastic plate during transportation and storage of the valve member can be prevented as much as possible.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing an embodiment of the pump of the present invention.
FIG. 2 is a longitudinal sectional view showing a valve member of the same embodiment.
FIG. 3 is a longitudinal sectional view showing another embodiment of the present invention.
FIG. 4 is a longitudinal sectional view showing a valve member of the same embodiment.
FIG. 5 is a longitudinal sectional view of the valve member at a 90 ° rotation position.
FIG. 6 is a transverse sectional view taken along line XX of the valve member.
FIG. 7 is a cross-sectional view taken along line YY of the valve member.
[Explanation of symbols]
2 ... container body, 3 ... mouth-neck part, 4 ... mounting cylinder, 5 ... cylinder, 6 ... stem,
7 ... Nozzle, 8 ... Depressing head, 9 ... Valve member, 10 ... Coil spring,
11 ... Locking step, 12 ... Base, 13 ... Elastic plate, 14 ... Valve seat, 15 ... Valve body,
21 ... Ring part, 22 ... Support / protection wall, 23 ... Top plate part, A ... Fixed suction part,
B ... Actuating member

Claims (1)

  A fixed suction part A in which the cylinder 5 is fixed in a state where the lower end is suspended in the container body by the mounting cylinder 4 fitted to the outer periphery of the mouth-and-neck part 3 of the container body 2, and upward biasing from the opening at the center of the upper end of the suction part And an operating member B having a push-down head 8 with a nozzle 7 fitted and fixed to the upper end of the stem 6 that is protruded so as to be movable up and down in a state, so that the liquid in the container body is sucked up and ejected from the nozzle by the vertical movement of the operating member. In the liquid jet pump constructed as described above, the coil spring 10 whose upper end is locked to the lower surface of the actuating member B is in contact with the locking step portion 11 provided in the cylinder by the coil spring 10 and It is possible to open and close the valve hole by press-contacting to the valve seat 14 at the lower end of the cylinder 5 through the base 12 that is press-fitted and locked in a state in which the liquid can flow up and down, and the elastic plate 13 that is suspended from the lower surface of the base 12. Suction valve C is formed by closing And the elastic plate 13 is provided with a valve member 9 having a meandering plate shape extending from the center of the bottom surface of the base 12 to the center of the top surface of the valve body 15. A plurality of circumferentially protruding locking ribs 16 are provided on the locking step portion 11 formed on the inner edge of the upper surface of the locking rib 16. The base plate 12 has a top plate portion 23 spanned between the upper surfaces of the support protection walls, and the elastic plate between the support walls 18 from the center of the back surface of the top plate portion 23. 13. A liquid jet pump characterized in that 13 is suspended and the upper part of the valve body 15 is inserted and supported in a ring portion 21.

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