JPH10272392A - Vertical pump type liquid jetting instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the inside of a cylinder lower section from being highly pressurized when an operation body is clamped to the lower limit in a vertical pump type liquid jetting instrument in which the operation member to stand up by being upwardly energized from inside the cylinder is pressed down in against the energizing force and engaged at the pressing-down position and the lower end of a liquid jet pipe of the operation member is closed at the pressing-down position by a closed-end sealing cylinder at the upper end of a sealing member standing up from inside the cylinder low section. SOLUTION: A closed-end sealing pipe 24 section being in contact with a lower section inner wall face of a jet pipe 12 in the water-tight state is formed in the upper section of a sealing cylinder, and an elastically deformable thin-wall section or sections 36 are formed vertically on one or a plurality of sections on the upper section of the sealing cylinder, and a check valve 37 for releasing the liquid in the cylinder lower section into the jet pipe 12 is formed by the thin-wall sections 36 and the lower section inner wall face of the jet pipe 12 with which the outer faces of the thin wall sections 36 are brought into contact.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art For example, as disclosed in JP-A-9-24310,
From the inside of the cylinder having the suction valve in the bottom, the operating member that is urged upward and rises up is pressed down against the urging and locked at the pushing-down position. 2. Description of the Related Art There is known a vertical pump type liquid ejector in which a bottomed sealing cylinder at the upper end of a rising sealing member is fitted to an inner surface of a lower end opening of a discharge pipe of an operating member in a watertight manner. The reason for locking the actuating member to the depressed position against the urging as described above is to prevent the liquid ejector from becoming bulky at the time of transportation, and to attach the bottomed seal cylinder to the lower end of the discharge pipe. The reason for fitting watertight into the opening is to prevent leakage of liquid from the operating member when the container falls down in a state where the operating member is pressed down and locked.

[0003]

In the above-mentioned conventional liquid ejector, when used, the operating member is raised and the liquid in the container is sucked into the cylinder via the suction valve in the seal bottom by the up and down movement. The liquid in the cylinder is ejected from the nozzle of the pressing head at the upper end of the operating member via the discharge valve in the operating member. There was a case to stop.

In this case, since the liquid has already flowed into the cylinder after being used once, the prevention of liquid leakage when the operating member is depressed is performed by discharging the operating member as described above. Since the bottomed seal cylinder is fitted into the lower end opening of the pipe, the upper end of the bottomed seal cylinder fits into the inner edge of the lower end opening of the discharge pipe by pressing down the operating member, and the upper end of the sealed cylinder and the cylinder Even after the lower portion of the cylinder is sealed with the suction valve in the bottom, the operating member is further lowered to ensure the sealing, so that the pressure in the lower portion of the cylinder increases, and the operating member and the operating member The guide cylinder of the operating member connected to the upper end of the cylinder comes off the cylinder and is pushed upward, or the cylinder expands and deforms.
The pump function could be impaired.

The present invention eliminates the above-mentioned danger by providing a check valve at the fitting portion between the lower end of the discharge pipe and the bottomed seal cylinder to allow the high-pressure liquid in the lower part of the cylinder to escape into the discharge pipe. is there.

[0006]

As a first means, an operating member 4 which is urged upward and erected from the inside of a cylinder 2 having a suction valve 27 in the bottom thereof is pressed down against the urging to push it down. The bottomed sealing cylinder 24 at the upper end of the sealing member 21, which is raised from the inner surface of the lower portion of the cylinder, is watertight to the inner surface of the lower end opening of the discharge pipe 12 of the operating member 4. In the vertical pump type liquid ejector provided so as to be fitted to, a bottomed seal cylinder portion that is in water-tight contact with the lower inner wall surface of the discharge pipe 12 is formed at the upper portion of the seal cylinder, and at the upper portion of the seal cylinder. An elastically deformable thin portion 36 is vertically provided at one or more locations, and the liquid in the lower portion of the cylinder is allowed to escape into the discharge pipe 12 between the thin portion and the inner wall surface of the lower part of the discharge pipe where the outer surface of the thin part is in water-tight contact. A check valve 37 was formed.

As a second means, the above-mentioned first means is provided, and the entire upper portion of the bottomed sealing cylinder 24 is formed as a thin portion 36 which can be elastically deformed.

As a third means, the operating member 4 which is urged upward and rises from the inside of the cylinder 2 having the suction valve 27 in the bottom portion is pressed down against the urging and locked at the pushed-down position. In the depressed position, a bottomed sealing cylinder 24 at the upper end of the sealing member 21 erected from the inner surface of the lower portion of the cylinder is provided so as to fit water-tightly into the inner surface of the lower end opening of the discharge pipe 12 of the operating member 4. In the vertical pump type liquid ejector, the lower end inner diameter of the discharge pipe 12 is formed in the large inner diameter portion 42 via the downward step portion 41, and the bottomed seal cylinder is inserted into the large inner diameter portion.
24 is inserted between the inner surface of the large-diameter portion and the outer surface of the bottomed seal cylinder so that liquid can flow therethrough, and the elastic thin cylinder 43 is hung down from the inner peripheral edge of the downward step portion 33, and Bottom seal cylinder
A check valve 37 for allowing the liquid in the lower part of the cylinder to escape into the discharge pipe 12 is formed of the elastic thin cylinder and the bottomed seal cylinder by being pressed against the inner surface of the upper part of the cylinder 24 in a watertight manner.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a conventionally known structure will be described. 1 is a mounting cylinder which is screwed to the outer surface of the mouth and neck of a container body.
A cylinder 2 having a suction valve is suspended from the upper part of the mounting cylinder to the inner surface of the bottom part. A guide cylinder 3 having a female thread on the inner surface is fitted in the upper end of the cylinder.

The operating member 4 is inserted into the cylinder in a downwardly depressed state against the upward bias by the spring 5, and a stem fitting cylinder 7 that is suspended from a depressing head 6 at the upper end of the operating member is The guide tube 3 is screwed to the inner surface. The operating member has a cylindrical piston 9 at a lower end of a stem 8 and a discharge valve 10 in an upper part of the stem, and the upper part of the stem is fitted to the inner surface of the stem fitting cylinder 7. The stem 8 and the stem fitting tube 7 form a discharge pipe 12 for ejecting the liquid in the cylinder from the nozzle 11 of the press-down head 6. The operating member 4 is erected from the guide cylinder 3 and rises upward by an upward bias.

A sealing member is provided in a lower portion of the cylinder 2.
21 are decorated. The sealing member is provided with an outer peripheral portion of the base plate 22 placed on an upward step provided on the plurality of ribs 13 provided vertically on the inner surface of the lower portion of the cylinder, and an upright portion having a cross-shaped cross section rising from the base plate. A bottomed sealing cylinder 24 is attached to the upper end of 23, and the bottomed sealing cylinder is fitted into the opening of the lower end of the discharge pipe 12 to seal the lower end of the discharge pipe.

In the illustrated example, from the center of the lower surface of the base plate 22 described above,
A bent spring plate 25 having a bent portion in a meandering cross section is hung down, and a suction valve plate 26 attached to the lower end of the spring plate is pressed against a valve seat provided at the cylinder bottom to form a suction valve 27. However, as in the case of the discharge valve 10, it may be formed by a ball valve.

In the above construction, according to the first aspect of the present invention, as shown in FIGS. 1 to 3, the lower part of the discharge pipe 12 is a large-diameter part 31 and the upper part of the large-diameter part 31 is a middle part. Inner diameter 32
The upper end of the middle inner diameter portion is formed as a downward step portion 33, and a sealing ridge 34 is provided around the lower inner surface of the middle inner diameter portion 32. The upper part was fitted, and a concave groove 35 was vertically provided on the inner surface of the upper part of the bottomed seal cylinder 24 to make the bottomed seal cylinder part outside the concave groove a thin part 36 that can be elastically deformed. The outer surface of the thin part is the inner diameter part
The check valve 37 is formed by pressing against the inner wall surface of the seal 32, particularly the inner surface of the seal ridge 34, and when the liquid in the lower part of the cylinder is pressurized, the check valve is opened to release the high-pressure liquid into the discharge pipe 12. Things. As shown, a small groove 38 may be formed in the downward step 33 above the concave groove 35 in the inward and outward directions to facilitate the escape of the high-pressure liquid.

In the above embodiment, the large inner diameter portion 31, the middle inner diameter portion
Although the seal ridges 32 and the like are provided on the lower inner surface of the discharge pipe, these are not necessarily required, and the upper part of the bottomed seal cylinder 24 may be directly fitted to the lower inner surface of the discharge pipe 12 in a watertight manner. Good. However, in this case, it is desirable to provide a tapered portion at the lower end of the discharge pipe for guiding the upper end of the bottomed sealing cylinder into the discharge pipe.

FIGS. 4 and 5 show a second embodiment. In this case, an example is shown in which the thin portion 36 capable of being elastically deformed in the embodiment shown in FIGS. In the illustrated example, the outer diameter of the upper half part of the bottomed sealing cylinder 24 is reduced to a small outer diameter, so that the inner surface side of the cylinder is made a thinner portion 36. It is.

FIGS. 6 and 7 show a third embodiment in which an elastic thin portion is provided on the discharge pipe 12 side. In this case, as shown in the drawing, the lower end inner diameter of the discharge pipe 12 is formed in the large inner diameter portion 42 through the downward step portion 41, and the elastic thin tube 43 is suspended from the inner peripheral edge of the downward step portion 41. I have. The bottomed seal cylinder 24 has a tapered portion with a large diameter
44, the upper half thereof is located between the elastic thin cylinder 43 and the inner wall surface of the large-diameter portion 42, and the elastic thin cylinder 43 is pressed against the inner surface of the bottomed seal cylinder 24 in a watertight manner to check it. Valve 37. Also in the case of this embodiment, the seal ridge 34 is provided around the inner surface of the bottomed seal cylinder below the tapered portion.

In each of the embodiments described above, when the operating member 4 is depressed from the state where the cylindrical piston 9 of the operating member 4 is located in the upper portion of the cylinder 2, the liquid in the upper portion of the cylinder passes through the discharge valve 10 and passes through the nozzle. Squirt through eleven. First,
In the second embodiment, a thin portion 3
In the third embodiment, the upper ends of the elastic thin tubes 4
3. The lower end of the cylinder is hermetically sealed by bringing the lower end into water-tight contact with the inner surface of the upper end of the bottomed sealing cylinder 24. When the operating member 4 is further lowered to screw the guide tube 3 and the stem fitting tube 7 from the above state, the volume in the lower portion of the cylinder is further reduced. Then, in the case of the first and second embodiments, the thin portion 36,
In the case of the third embodiment, the thin-walled cylinder 43 is pushed inward against the elasticity by the high-pressure liquid and the operating member 4 reaches the lower limit. Tube
43 restores elasticity and closes each check valve 37. Therefore, in this state, even if the suction valve 27 is formed of a ball valve and the container falls down, the liquid in the container enters the discharge pipe and leaks because the check valve is provided. There is no. In the case of a suction valve which automatically closes as shown in the figure, the suction valve and the check valve prevent liquid leakage twice, so there is no concern about liquid leakage.

[0018]

According to the present invention, the bottomed sealing cylinder 24 which is in water-tight contact with the lower inner wall surface of the discharge pipe 12 is provided with the sealing member. A discharge pipe in which a part or the whole of the upper part of the cylinder is elastically deformable thin portions 36, 36 and the thin portion and the outer surface of the thin portion are in water-tight contact
Since the check valves 37 and 37 are formed with the lower inner wall surface of the cylinder 12, the inside of the cylinder lower part does not abnormally increase in pressure as in the above-described conventional example. There is no possibility that the guide cylinder 3 will come off from the upper end of the cylinder.

In the case of the third aspect of the present invention, the first aspect of the present invention is provided.
In addition to having the same effect as the effect of the second aspect of the present invention, since the elastic thin tube 43 is provided on the discharge pipe 12 side, when assembling each component, the sealing member 21, the spring 5 and the like are put into the cylinder. After that, the lower part of the operating member 4 with the elastic thin tube 43 is inserted, so that the assembling can be performed quickly. That is, in the case of the first and second aspects of the invention, since the spring 5 is inserted into the cylinder after the sealing member 21 is inserted into the cylinder, the spring is provided in the bottomed sealing cylinder 24 of the sealing member. It is necessary to insert the spring while taking care not to damage the thin portion 36, but in the case of the third aspect of the invention, the elastic thin tube is used.
Since the discharge pipe 12 of the operating member with 43 is mounted in the cylinder after the spring is mounted, there is no possibility that the elastic thin cylinder 43 is damaged when the spring is mounted, and therefore, it is possible to quickly assemble them. I can do it.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a liquid ejector of the present invention.

FIG. 2 is an enlarged sectional view of a main part of FIG. 1;

FIG. 3 is an enlarged perspective view of a main member of FIG. 1;

FIG. 4 is a longitudinal sectional view of a liquid ejector of the present invention shown in a second embodiment.

FIG. 5 is an enlarged sectional view of a main part of FIG. 4;

FIG. 6 is a longitudinal sectional view of a liquid ejector of the present invention shown in a third embodiment.

FIG. 7 is an enlarged sectional view of a main part of FIG. 6;

[Explanation of symbols]

 12 ... Discharge pipe 21 ... Seal member 24 ... Bottom seal cylinder 36 ... Thin wall 37 ... Check valve 43 ... Elastic thin cylinder

Claims (3)

[Claims] 1. A cylinder 2 having a suction valve 27 in the bottom.
From below, the operating member 4 which is erected upward by being urged upward is pressed down against the urge to be locked at the depressed position, and the sealing member 21 erected from the inner surface of the lower portion of the cylinder at the depressed position. In a vertical pump type liquid ejector in which a bottomed seal cylinder 24 at the upper end is provided in a watertight manner to fit inside the lower end opening of the discharge pipe 12 of the operating member 4, a lower inner wall surface of the discharge pipe 12 is provided. A bottomed sealing cylinder portion which is in contact with water is formed at an upper portion of the sealing cylinder, and a thin or elastically deformable thin portion 36 is formed at one or more locations on the upper portion of the sealing cylinder.
A vertical check valve 37 in which the thin portion and the inner wall surface of the lower part of the discharge pipe where the outer surface of the thin portion is in water-tight contact are formed with a check valve 37 for discharging the liquid in the lower part of the cylinder into the discharge pipe 12. Pump-type liquid ejector. 2. The vertical pump type liquid ejector according to claim 1, wherein the entire upper part of the bottomed seal cylinder is formed as a thin portion which can be elastically deformed. 3. A cylinder 2 having a suction valve 27 in the bottom.
From below, the operating member 4 which is erected upward by being urged upward is pressed down against the urge to be locked at the depressed position, and the sealing member 21 erected from the inner surface of the lower portion of the cylinder at the depressed position. In a vertical pump-type liquid ejector in which a closed-end sealed cylinder 24 at the upper end is provided in a watertight manner inside the lower end opening of the discharge pipe 12 of the operating member 4, the inner diameter of the lower end of the discharge pipe 12 Is formed in the large-diameter portion 42 via the downwardly facing step portion 41, and the bottomed sealing cylinder 24 is introduced into the large-diameter portion, and the liquid flows through between the inner surface of the large-diameter portion and the outer surface of the bottomed sealing cylinder. Can be inserted and the downward step 33
An elastic thin cylinder 43 is hung down from the inner peripheral edge of the cylinder, and is brought into water-tight contact with the upper inner surface of the bottomed seal cylinder 24 so that the liquid in the lower part of the cylinder is discharged into the discharge pipe 12 by the elastic thin cylinder and the bottomed seal cylinder. A vertical pump type liquid ejector characterized by forming a check valve 37 for allowing the liquid to escape.