JP3712819B2 - Liquid ejector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a liquid ejector for sucking up liquid in a container into a cylinder by operating a trigger or an operation member and ejecting the liquid from a nozzle, and is fitted into a suction pipe fitting cylinder of the liquid ejector and hangs down. It is equipped with a mechanism that can reliably prevent the suction pipe from falling off.
[0002]
[Prior art]
For example, Japanese Utility Model Laid-Open No. 3-49960 discloses a liquid ejection container in which an operating member push-down type liquid ejection container is provided with a suction pipe-extracting protrusion at the lower end of the cylinder at the lower end of the cylinder. Is disclosed.
[0003]
[Problems to be solved by the invention]
From the viewpoint of effective use of waste from the request for recycling and low cost, there are many products that can be used any number of times in the liquid ejection container by simply replacing the container body. In the product, the vertical pump must be removed from the container at the time of replacement, and then the suction pipe hanging from the vertical pump will easily come off the suction pipe mounting cylinder part by hitting an object outside the container body. However, there are some liquids that you do not want to touch.If such liquid adheres to the suction pipe, the removed suction pipe will eventually be reattached to the suction pipe mounting cylinder. In many cases, it was thrown away as waste together with the vertical pump without being mounted, which was against the request for recycling.
Therefore, in the above conventional example, in order to prevent this, a ridge is provided around the inner surface of the suction pipe mounting cylinder portion, and the suction pipe is pushed into this and the outer surface of the suction pipe is pressed and engaged with the protrusion. The protrusion was rounded and protruded in the horizontal direction.
[0004]
In addition, the ridge is formed on the pipe mounting cylinder itself that hangs down from the lower end of the cylinder, and the suction valve seat is also formed on the suction pipe mounting cylinder. was there.
Furthermore, since the suction valve seat is formed in the pipe mounting cylinder part integrated with the cylinder as described above, its position is restricted, and as a result, the degree of freedom of the entire configuration of the liquid ejection container itself is restricted. The degree of design freedom had to be limited.
[0005]
The liquid ejector according to claim 1, wherein a plurality of long holes are formed in the upper part of the cylinder wall on the inner surface of the suction pipe fitting cylinder, and a plurality of back pierces projecting upward and inward from the lower end surface of these long holes. By fitting the tube with the reverse puncture, pushing the upper part of the suction pipe into the cylinder with the reverse puncture, and pressing the tip of the reverse piercing to the upper outer surface of the suction pipe, thereby preventing the suction pipe from being pulled out, By forming the back puncture in a cylinder with a back puncture separate from the cylinder, the degree of freedom in forming the back puncture is increased.
[0006]
The liquid ejector according to claim 2 has the solution to be solved by the liquid ejector according to claim 1, and the tapered suction valve seat is formed in a valve holding cylinder separate from the cylinder. It is intended to increase the degree of freedom in setting the position of the suction valve seat.
[0007]
[Means for Solving the Problems]
As a first means, in a liquid ejector for sucking up the liquid in the container 3 into the cylinder 3 by the operation of the trigger or the actuating member 13 and ejecting the liquid from the nozzle 22, fitting of a suction pipe suspended from the lower end of the liquid ejector A plurality of elongated holes 30 are formed on the inner surface of the cylinder 7 at the upper part of the cylinder wall, and a plurality of counter-piercing cylinders 29 are fitted from the lower end surface of these elongated holes upward and inwardly. The upper part of the suction pipe 28 was pushed into the stabbed tube 29, and the tip of the reverse piercing 31 was brought into pressure contact with the upper outer surface of the suction pipe 28.
[0008]
As a second means, the first means is provided, and the valve holding cylinder 34 is erected from the upper end of the back-pricked cylinder 29 via an inward flange, and the upper inner surface of the valve holding cylinder is tapered with a small diameter on the bottom. A suction valve seat 35 was formed.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a cross-sectional view of a liquid ejector according to the present invention, and FIG. 2 is a perspective view of a discharge valve body.
The liquid ejector according to the present invention includes any one of a vertical pump type liquid ejector that sucks and ejects liquid by operating an operation member, and a trigger type liquid ejector that sucks and ejects liquid by a trigger operation. Although the present invention is applied to the former, a conventionally known type of vertical pump type liquid ejector different from the conventional example will be briefly described here.
[0010]
In FIG. 1, 1 is a mounting cylinder fitted to the outer surface of the container body neck 2 and 3 is a cylinder.
The cylinder 3 is suspended in the container body by engaging an outward flange 4 attached to the upper end portion with the lower surface of the inward flange 5 at the upper end of the mounting cylinder 1.
[0011]
Further, the cylinder 3 is provided with an upright cylindrical portion 6 with a window hole from the lower end through an inward flange, and a suction pipe is fitted from the lower surface of the inward flange portion between the cylindrical portion 6 and the cylinder wall. The tube 7 is suspended.
[0012]
8 is a member with a screw cylinder, which consists of a double cylinder of an inner cylinder 9 and an outer cylinder hanging from the lower surface of the flange-like top plate 8a, and the inner cylinder 9 has an engaging protrusion formed vertically on the upper end outer surface of the cylinder upper end 10 inner surface. The fitting cylinder 11 suspended from the inner surface of the lower end thereof is fitted into the inner surface of the cylinder 3 so that it cannot be removed from the upper end portion of the cylinder.
[0013]
Further, the inner cylinder 9 has an internal thread 12 formed on the inner surface of the upper end portion, and the lower end portion of the fitting cylinder 11 is a lower small diameter tapered cylinder portion. The connecting portion between the cylindrical piston 15 and the stem 14 can be brought into contact freely.
[0014]
Reference numeral 13 denotes an operating member, which has a cylindrical piston 15 at the lower end of the stem 14 fitted into the cylinder 3 by being urged upward, and a pressing head 16 with a nozzle fitted to the upper outer surface of the stem 14. Yes.
The cylindrical piston 15 is fitted to the inner surface of the cylinder 3 with the outer peripheral edges of both the upper and lower end surfaces in an airtight and freely movable manner. An inward flange protrudes from the inner peripheral surface of the cylindrical piston 15, and a stem 14 protrudes upward from the inner peripheral edge of the inward flange. The stem 14 has a lower-diameter tapered discharge valve seat 17 on the inner surface of the upper end.
[0015]
The upper end of the coil spring 19 is engaged with the lower surface of the inward cylinder forming the connecting portion between the stem 14 and the cylindrical piston 15 to urge the cylindrical piston 15 upward.
[0016]
The pressing head 16 with the nozzle has a hanging cylinder 20 suspended from the top wall, and the hanging cylinder 20 has a screw cylinder suspended from the lower end. On the outer surface of the screw cylinder, a male screw 21 that can be screwed onto the female screw 12 is formed, and the inner surface thereof is fitted to the outer surface of the stem 14.
[0017]
Reference numeral 24 denotes a discharge valve body, and FIG. 2 shows a state before assembly to the stem 14. As shown in the figure, the discharge valve body 24 has a valve plate 25 that is expanded upward and outward from the upper end of the valve stem, and a plurality of protrusions that are radially extended downward from the lower end of the valve stem before assembly. Engaging plate 26.
[0018]
When assembling the discharge valve body 24 to the stem 14, the engagement plate 26 is bent upward from its base so that its tip is slidably contacted with the inner surface of the upper end of the stem, and the upper part of the valve plate 25 is below the upper part. The outer surface may be placed on the tapered discharge valve seat 17. The discharge valve body 24 and the tapered discharge valve seat 17 form a discharge valve 27.
[0019]
In the present invention, an extraction preventing means is provided so that the suction pipe 28 does not easily come out, and this will be described below. As described above, the cylinder 3 hangs the suction pipe fitting cylinder 7 from its lower end. The cylinder 29 with the reverse puncture is sucked into the inner surface of the suction pipe fitting cylinder 7 and the outer surface of the cylinder 29 with the reverse puncture is absorbed. The concave and convex portions provided on the inner surface of the raising pipe fitting cylinder 7 are engaged with each other , and a long hole 30 extending vertically is provided vertically at the upper end of the tube with the reverse stab. A plurality of the long holes 30 are formed at predetermined intervals in the circumferential direction, and a counterspin 31 projects from the bottom end surface of each long hole toward the upper and inner sides.
[0020]
The back pierce 31 has a wedge shape whose longitudinal cross-sectional shape is an elongated triangle as shown in the figure, and the above-mentioned upper and inner direction indicating the protruding direction of the back pierce 31 is above the wedge-shaped back pierce 31. It means that the inclined surface is located between two orthogonal planes of a vertical plane including the cylinder axis and a horizontal plane including the cylinder diameter.
[0021]
Further, the lower end surface of the long hole 30 from which the barb 31 protrudes may be a horizontal plane. However, as shown in the drawing, the bottom of the wedge barb 31, that is, the base 32 of the lower slope and the base of the upper barb. It is preferable that the inclined surface forms a bottom side connecting to 33. By making the bottom of the wedge-shaped back bar 31 longer, when a downward load is applied to the suction pipe 28, the back bar 31 is prevented from being easily deformed downward with its base as a fulcrum. is there.
[0022]
After fitting such a tube with reverse puncture 29 to the inner surface of the suction pipe fitting cylinder 7, the upper portion of the suction pipe 28 is pushed into the tube 29 with reverse puncture and the tip of the reverse pierce 31 is directed to the outer surface of the suction pipe 28. Press contact.
As described above, from the standpoint of preventing the suction pipe 28 from being pulled out, it is sufficient to fit the tube 29 with the back stab onto the inner surface of the suction pipe fitting cylinder 7. The following measures are taken from the viewpoint of providing a tapered suction valve seat on a member separate from the cylinder to increase the degree of design freedom.
[0023]
That is, the valve holding cylinder 34 is erected from the upper end of the tube 29 with reverse piercing through the inward flange, the valve holding cylinder 34 is fitted to the lower inner surface of the top tube portion 6 with a window hole, and the valve holding A tapered suction valve seat 35 having a lower diameter is formed on the inner surface of the upper end of the cylinder, and a suction valve body 36 is placed on the tapered suction valve seat 35. The tapered suction valve seat 35 and the suction valve body 36 form a suction valve 37.
The inward flange is provided with the same number of short holes connected to the long holes 30 as the long holes at predetermined intervals in the circumferential direction.
[0024]
Next, the operation of this embodiment will be described.
A valve holding cylinder 34 is formed at the upper end of the tube with back puncture 29, and the valve holding cylinder 34 is fitted to the lower inner surface of the topped cylinder portion 6 with a window hole. 7 After fitting the inner surface of the suction pipe 28, the upper part of the suction pipe 28 is pushed into the tube 29 with the reverse stick, and the tip of the reverse stick 31 is pressed against the outer surface of the suction pipe 28. In this state, the suction pipe 28 is moved downward. When pulled, the tip of the counterspin 31 that faces upward and inward sticks into the pipe wall of the suction pipe 28, so that the suction pipe 28 does not easily come out.
[0025]
Further, the tube with back puncture 29 is separate from the cylinder 3, and the back puncture tube 29 is formed with only the back piercing 31 without providing a tapered suction valve seat. The degree of freedom is relatively high, and therefore there are relatively few restrictions on the shape of the barb 31.
[0026]
Further, since the tapered suction valve seat 35 is formed in the valve holding cylinder 34 which is separate from the cylinder 3, the degree of freedom in setting the valve seat position is high, and therefore the degree of freedom in designing the liquid ejector itself is increased. To do.
As described above, the valve holding cylinder 34 can be omitted when only the suction pipe 28 is prevented from being pulled out.
[0027]
The above is an example in which the present invention is applied to a vertical pump type liquid ejector that sucks and ejects liquid into the cylinder by operating the operating member. However, the present invention is not limited to this, and the liquid is sucked into the cylinder by a trigger operation. As described above, the present invention can also be applied to a trigger type liquid ejector to be ejected.
[0028]
【The invention's effect】
The liquid ejector according to claim 1, wherein a plurality of long holes are formed in the upper part of the cylinder wall on the inner surface of the suction pipe fitting cylinder, and a plurality of back pierces projecting upward and inward from the lower end surface of these long holes. The pipe with the reverse stab is fitted, the upper part of the suction pipe is pushed into the cylinder with the reverse puncture, and the tip of the reverse pierce is pressed against the upper outer surface of the suction pipe, so that a downward load acts on the suction pipe. Even so, since the tip of the reverse piercing pointed upward pierces the outer surface of the suction pipe, the suction pipe does not easily come out.
[0029]
Further, the tube with back puncture is a separate body from the cylinder, and the tube with back stab does not have a tapered suction valve seat, and only the back stab is formed. It is relatively high and therefore there are relatively few constraints on the shape of the barb.
[0030]
In the liquid ejector according to claim 2, since the tapered suction valve seat is formed in the valve holding cylinder separate from the cylinder, the degree of freedom in setting the valve seat position is high. Therefore, the design of the liquid ejector itself The degree of freedom increases.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a first embodiment of a liquid ejector according to the present invention.
FIG. 2 is a perspective view of a discharge valve body.
[Explanation of symbols]
3 Cylinder 7 Suction pipe fitting cylinder 13 Actuating member 22 Nozzle 28 Suction pipe 29 Cylinder 30 with reverse piercing Long hole 31 Back piercing 35 Tapered suction valve seat

Claims (2)

In a liquid ejector that sucks up the liquid in the container body into the cylinder 3 by the operation of the trigger or the operating member 13 and ejects the liquid from the nozzle 22 to the inner surface of the suction pipe fitting cylinder 7 suspended from the lower end of the liquid ejector. A plurality of long holes 30 are drilled in the upper part of the wall, and a plurality of back piercing cylinders 29 projecting upward and inward from the lower end surfaces of these long holes are fitted to the outer surface of the back piercing cylinder 29 and a suction pipe. The concave and convex portions provided on the inner surface of the tube 7 are engaged with each other, and the upper portion of the suction pipe 28 is pushed into the tube 29 with the reverse stick, and the tip of the reverse stick 31 is brought into pressure contact with the upper outer surface of the suction pipe 28. A liquid ejector characterized by that. 2. A valve holding cylinder 34 is erected from an upper end of the tube with reverse pin 29 via an inward flange, and a lower-diameter tapered suction valve seat 35 is formed on the upper inner surface of the valve holding cylinder. Liquid ejector as described.

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