JP2594560Y2 - Liquid dispensing pump - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid injection pump.

[0002]

[Prior art]

[Problems to be Solved by the Invention] As a liquid pouring pump, the lower peripheral edge is closely mounted on the upper surface of the cylinder bottom wall.
This part has a valve stem configured as a suction valve, and the pressurized liquid in the cylinder opens the discharge valve at the upper end in the stem and pushes out from the nozzle hole of the head by pushing down the operating member consisting of the piston, stem and head. Further, there is known a configuration in which the pressure in the cylinder is reduced by raising the operating member, the valve stem rises, and the suction valve is opened.
These are configured so that they can be screwed and locked to the threaded cylinder at the upper end of the cylinder when the operating member is depressed at the lowest position when not in use.

In a conventional container of this type, when the operating member is unscrewed and raised at the beginning of use, the contact portion between the lower surface of the valve stem and the upper surface of the cylinder bottom wall forming the suction valve does not peel off. In some cases, the valve stem is not lifted, and the operating member is moved up and down many times.

Further, a discharge valve using a ball valve body is provided in the upper part of the stem, but in the discharge valve using this ball valve body, the ball valve body is displaced from the valve seat when the container is accidentally knocked down. The liquid cannot be sealed, resulting in a disadvantage that the liquid leaks from the nozzle.

The present invention proposes an excellent liquid dispensing pump which has solved the above-mentioned disadvantages of the prior art.

[0006]

In order to solve the above-mentioned problems, the pump according to the present invention has a mounting cap 2 fitted to the outer periphery of the neck 6 of the container body, an upper end fixed to the cap 2 and a lower end attached to the container body 6. To the inside and at the lower end of the inner surface
Peripheral cylinder 3 formed by Tate設directions plurality of ribs 19, shea <br/> cylinder 3 of the bottom wall 16 is closely placed on flange 21 lower surface which projects from the lower periphery to the upper surface by suction in both valve 35 with constituting a valve stem 4 which is extended to the upper end to the upper cylinder 3, an annular piston 23 which has slidably fitted in a liquid tight manner and vertically the outer surface sheet cylinder 3 inner surface, the piston 2
3 is fixed to the lower end of the valve stem 4 upper inside by vertically movable accommodated by extending upward, and a stem 24 formed by a discharge valve 29 provided within the upper end, fixed to the stem 24 the upper end as well as a head 26 depressed with nozzles is vertically movably protrude 2 upper mounting cap, the annular pin
Stone 23 is interposed between the lower surface and the rib 19 upper surface, the piston 23, stem 24, it becomes the operating member 5 made of depressed head 26 from the spring 30 for energizing upward, the cylinder 3 at work moving member 5 downward state Screw part 14 at the upper end
The actuating member 5 is configured to be capable of being screwed and locked.
Whether the lower surface of the nozzle 21 is in contact with the upper surface of the cylinder bottom wall 16
The upper surface of the flange 21 contacts the lower surface of the spring 30
In the liquid pouring pump vertical movement of the actuating member 5 is configured so as to be between the up state, through a concavo-convex engaging means in work moving member downward retained state a ring-shaped piston 23 inside surface valve rod 4 the outer surface The inner skirt portion 23c of the piston 23 is liquid-tightly engaged with the lower end of the ridge 34 provided around the upper end of the outer periphery of the valve rod 4 when the operating member 5 is raised.

[0007]

In the state shown in FIG. 1, the fitting groove 32 of the piston 23 and the ridge are provided.
Even if the container is accidentally knocked down and the ball valve body of the discharge valve is displaced from the valve seat, the liquid is sealed in this portion, and the liquid does not leak from the nozzle because the liquid seal 31 is fitted in a liquid-tight manner.

When the screwing of the actuating member 5 with the threaded tube portion 14 is released from the state shown in FIG. 1, the actuating member 5 is raised by the action of the spring 30, and the liquid can be poured out. At this time, because it is locked by concavo-convex engaging section and the annular piston 23 and the valve stem 4, the valve rod 4 rises together until its flange 21 partial top comes into contact with the lower surface a spring 30, the valve rod 4 lower surface There is no inconvenience that the contact surface between the cylinder and the upper surface of the cylinder bottom wall 16 does not peel off. In addition, as shown in FIG.
Since c contacts the lower surface of the ridge 34 at the upper end of the valve stem 4 in a liquid-tight manner,
There is no leakage of liquid from the nozzle even if the container is accidentally knocked down.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show an embodiment of the present invention.
In the figure, reference numeral 1 denotes a liquid discharge pump. The pump 1 includes a mounting cap 2, a cylinder 3, a valve stem 4, and an operating member 5 as main members.

The mounting cap 2 has a cylindrical shape with an opening at the lower end face where a top wall 9 having an inward flange shape extends from the upper end edge of a peripheral wall 8 screwed to the outer periphery of the mouth and neck portion 7 of the container body 6. The upper surface of the outward flange 10, which is protruded from the upper part of the outer periphery of the cylinder 3 whose lower end is suspended and is mounted on the upper surface of the mouth and neck portion 7 through the packing 11, is pressed and locked by the top wall 9 to form the container body 6.
To be detachably attached to

A screw member 12 is fitted and fixed to the upper end of the cylinder 3. The member 12 is formed by vertically extending a threaded cylindrical portion 14 fitted to the inner surface of the upper end of the cylinder 3 from the inner peripheral edge of an inward flange extending from the upper end edge of the fitting cylindrical portion 13 fitted to the outer peripheral upper end of the cylinder 3. The fitting tube 13 prevents the mounting cap 2 from slipping upward.

The cylinder 3 has a tapered bottom wall 16 extending inward from the lower edge of the peripheral wall 15, a circular suction port 17 formed in the center of the bottom wall 16, and a bottom surface of the bottom wall 16. A fitting cylindrical portion 18 for fitting a suction pipe is provided vertically. A plurality of ribs 19 in the circumferential direction are provided vertically at the lower end of the inner surface of the peripheral wall 15.

The valve stem 4 has a rod shape having a diameter-reduced portion 20 at the upper part, and the lower surface thereof extends outward from the lower end of the outer periphery to the cylinder bottom wall 16.
A flange 21 having a tapered surface that is in close contact with the tapered surface of the upper surface protrudes, and a suction valve 35 is formed by the upper surface of the bottom wall 16 and the valve rod 4. The flange 21 has one or more through holes 22 through which a liquid flows. In addition, flange 21
Are provided with cut grooves radially in the circumferential direction through which the respective ribs 19 of the cylinder 3 can be inserted. And cut each kerf into each rib 19
, And the lower surface is closely mounted on the upper surface of the cylinder bottom wall 16 so as to rise up and down in the center of the cylinder 3.

The operating member 5 includes an annular piston 23 having a substantially H-shaped cross section in which outer upper and outer lower skirt portions 23a and 23b are fitted to the inner surface of the cylinder peripheral wall 15 so as to be liquid-tight and slidable up and down.
Is fixed to the lower end of the cylindrical stem 24.
At the upper end, a press-down head 26 with a nozzle 25 that moves up and down above the screw member 12 is fixed and mounted so as to be able to move up and down. The piston 23 is formed of a flexible and elastic material such as rubber or synthetic resin. A discharge valve 29 in which a ball valve body 28 is mounted on a valve seat 27 so as to be able to move up and down is provided at an upper end portion inside the stem 24 so as to flow unidirectionally from upstream to downstream.

The operating member 5 includes a coil spring 30 installed between the lower surface of the piston 23 and the upper surface of each of the ribs 19.
The upper part of the stem 24 is always urged upward, and a screw thread is screwed around the upper end portion of the stem 24 so as to be screwed with the inner surface thread of the screw part 14 so that the operating member 5 can be locked at the lowest position. I have.

When the operating member 5 is screwed into the lowermost position, the ridge 31 provided at a predetermined position on the outer periphery of the valve rod 4 is fitted into the fitting groove 32 provided on the inner surface of the inner lower skirt portion 23d of the piston 23. It is configured to be fitted and locked in a liquid-tight manner so as to provide a sealing property to this portion and to raise the valve stem 4 reliably. A plurality of ribs 33 in the circumferential direction are protruded from the lower end of the outer periphery of the valve stem 5 so that the protrusion 31 and the fitting groove 32 can be securely fitted.

Further, the inner upper skirt portion 23 of the piston 23
c, when the operating member 5 is pushed up to the uppermost position by the action of the spring 30, the lower surface of the ridge 34 provided around the upper end of the valve stem 4 is brought into liquid-tight contact with the lower surface of the ridge 34 so that the inside of the cylinder 3 and the stem 24 The inside is shut off to prevent leakage of liquid from the nozzle 25 due to the movement of the ball valve body 28 of the discharge valve 29 when the container falls down accidentally.

In the pump 1 constructed as described above, when the screwing with the screw 14 is released from the state shown in FIG. 1, the operating member 5 rises by the action of the spring 30, and at this time, the valve rod 4 also rises. However, when the upper surface of the flange 21 abuts against the lower surface of the spring 30, the engagement between the ridge 31 and the fitting concave groove 32 is released, and only the operating member 5 rises to a predetermined position. The portion 23c is configured so as to be pressed against the lower surface of the ridge 34 at the upper end of the valve rod 4 to seal in a liquid-tight manner.

Next, when the operating member 5 is pushed down from the raised state of the operating member 5 shown in FIG. 2, the valve stem 4 is lowered and its lower surface is in close contact with the upper surface of the cylinder bottom wall 16 to close the suction valve 35. The pressurized fluid inside is discharged from the stem 24
29 is opened and discharged from the nozzle 25 of the head 26. Next, when the pressing of the operating member 5 is released, the operating member 5 is raised by the action of the spring 30. At this time, the pressure in the cylinder 3 is reduced to a negative pressure, so that the discharge valve 29 is closed, and the suction valve 35 is opened instead, and the container body is opened. The liquid in 6 is sucked into cylinder 3.

The above members are all made of synthetic resin unless otherwise specified.

[0022]

As described above, the container according to the present invention has the above-described structure, so that the operating member can be erroneous even when the operating member is in the downwardly locked state when not in use or when the operating member is in the raised state when in use. There is no leakage of liquid due to overturning the container.

Further, when the screwing of the operating member is released from the lowering state of the operating member, there is no danger that the contact surface between the lower surface of the valve stem and the upper surface of the cylinder is not peeled off and is mistaken as a failure.

[Brief description of the drawings]

FIG. 1 is a half longitudinal sectional view showing an embodiment of the present invention.

FIG. 2 is a half sectional view showing an ascending state of the operating member of the embodiment.

[Explanation of symbols]

2 mounting cap, 3 cylinder, 4 valve stem, 5 operating member, 6 container, 14 screw part, 23 piston, 23c
Inner upper skirt, 24… Stem, 25… Nozzle, 26… Push down head, 29… Discharge valve, 30… Coil spring, 31
... projecting ridge, 32 ... fitting groove, 34 ... projecting ridge

Claims (1)

(57) [Scope of request for utility model registration] 1. A mounting cap 2 fitted to the outer periphery of a container body neck 6 and an upper end fixed to the cap 2.
The lower end is suspended in the container body 6 , and is
A cylinder 3 in which a countercurrent plurality of ribs 19 and Tate設 phosphorylates <br/> Da 3 of the bottom wall 16 upper surface is closely mounting the flange 21 lower surface which projects from the lower end peripheral portion by suction in both valve 35 with constituting a valve stem 4 which is extended to the upper end to the upper cylinder 3, an annular piston 23 which has slidably fitted in a liquid tight manner and vertically the outer surface sheet cylinder 3 inner surface, the piston 23 is fixed to the lower end, the valve stem 4 upper inside by vertically movable accommodated by extending upward, and a stem 24 formed by a discharge valve 29 provided within the upper end, is fixed to the stem 24 the upper end , a head 26 depressed with nozzles is vertically movably protrude 2 upper mounting cap, the annular piston
And a spring 30 interposed between the lower surface of the spring 23 and the upper surface of the rib 19 to urge the operating member 5 composed of the piston 23, the stem 24, and the press-down head 26 upward .
With the actuating member 5 to the threaded cylinder portion 14 of the cylinder 3 the upper end configured to allow Nishigigakaritome in work moving member 5 downward state, the flange
21 from the state in which the lower surface contacts the upper surface of the cylinder bottom wall 16.
Until the upper surface of the flange 21 contacts the lower surface of the spring 30.
Liquid through the liquid pouring pump vertical movement made by possible constructed of the actuating member 5, a concavo-convex engaging means in work moving member downward retained state a ring-shaped piston 23 inside surface valve rod 4 the outer surface between the at The upper skirt portion 23c of the piston 23 is liquid-tightly abutted against the lower surface of the ridge 34 provided around the upper end of the outer periphery of the valve rod 4 when the operating member 5 is raised. Liquid dispensing pump.