JP2003191989A - Liquid ejection pump, and method for screwing ejection head in the pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid ejection pump comprising a cylinder 4 with a ring member 3 fitted to an upper end part and a working member A with an ejection head 6 fitted to an upper end of a stem 5 protruded from an upper end opening of the cylinder in an upwardly urged condition and screwed and locked to the ring member when a working member is depressed, with the operational stability which can prevent the working member from being detached from the ring member by the external force when the pump is not in use, and easily unscrew the working member when the pump is in use. <P>SOLUTION: The pump comprises a surmountable projection 12 provided at a predetermined position of the ring member and the surmountable projection 12 provided at a predetermined position of the ejection head, and the ejection head reaches the predetermined screwing level at a time when the surmounting part rides over the surmountable part if the ejection head is lowered in a screwing manner. Thus, if the ejection head is turned downwardly to the surmountable position, the opening torque can be stably controlled. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a liquid jet pump.

[0002]

2. Description of the Related Art As a liquid jet pump, there is provided an operating member in which a jet head is fitted to the upper end of a stem projecting so as to be able to be pushed down while being biased upward from the upper end of a cylinder. It is known that the stored liquid in the mounted container body is ejected from the ejection port of the ejection head by the action of the built-in pump mechanism.

For the purpose of preventing the actuating member from being pushed down by an external force during storage and transportation and preventing inadvertent pouring of the liquid, the actuating member is pushed down onto the ring member fitted to the upper end of the cylinder. In general, it is configured so that it can be screwed and locked in the closed state. For example, the thread provided around the outer circumference of the ring member is screwed to the thread provided around the inner circumference of the peripheral wall of the ejection head to be screwed and locked.

In addition, the operation member in these pumps is screwed and locked by, for example, a capper that pushes down while rotating the upper surface thereof. The capper is configured so that the tightening torque is set in advance, and when the predetermined value is reached, the tightening is stopped. For example, the lower surface of the jet head peripheral wall abuts the upper surface of the flange protruding below the thread of the ring member. Tightening was stopped at that point and the end of screwing was made. On the other hand, the opening torque is adjusted by controlling the tightening torque of the capper.

[0005]

The loose engagement of these actuating members may cause the actuating members to come off during storage, transportation, etc. On the other hand, if the actuating members are too tight, it is difficult to unscrew them during use. Become. Therefore, it is preferable to adjust the torque properly so that it will not come off when not in use and can be relatively easily unscrewed when in use. It is difficult to apply a large opening torque.

That is, since the tightening torque cannot be controlled with high accuracy and there is a tendency to set a large control value for the purpose of preventing loosening, the lower surface of the jet head peripheral wall contacts the upper surface of the flange of the ring member. It is difficult to immediately stop tightening at the end of the screwing contact, and it is pressed more than necessary, and since the contact area between the two pressed is large, the friction force becomes larger and the opening torque is planned. There is a risk of becoming much larger, and variations easily occur.

The present invention has been made in view of the above points, and it is possible to reduce the variation of the opening torque to an extremely small extent, prevent the actuating member from coming off by an external force when not in use, and easily actuate the actuating member during use. It is possible to obtain the operational stability that can be unscrewed, and the structure can be formed without complicating compared with the conventional product, and no special torque management in the assembly line is required. The present invention proposes an excellent liquid ejection pump that improves productivity.

Another object of the present invention is to provide a liquid-squirting pump having such a spouting method, by which the spouting head can be easily screwed onto the ring member with a preferable opening torque. It is a proposal.

[0009]

In order to solve the above-mentioned problems, the liquid jet pump according to the first aspect of the present invention is provided with a cylinder 4 fitted with a ring member 3 at its upper end portion, and an upward biasing state from the cylinder upper end opening. A jet head 6 is attached to the upper end of the protruding stem 5.
And an actuating member A fitted with the actuating member, and is configured to suck up the liquid in the mounted container by the vertical movement of the actuating member and eject it from the ejection port a of the head. In a liquid jet pump configured to be attachable / detachable, a step-over protrusion 12 provided at a predetermined position of the ring member 3 and a step-over protrusion 13 provided at a predetermined position of the jet head 6 are provided. When the screw descends
The liquid jet pump is characterized in that it reaches the predetermined screwing level when the vehicle has passed over the overriding projection 12.

The liquid jet pump according to a second aspect of the present invention is
The ejection head 6 has a vertical cylinder 24 fitted to the upper end of the stem.
And the peripheral wall 26 is hung from the peripheral portion of the top plate 25, and the tip end ejection port a of the nozzle cylinder 27 having the base end opened to the vertical cylinder 24 is projected to the outside of the peripheral wall 26. It is a head, and the overriding protrusion 12 is an overriding protrusion protruding on the peripheral surface of the first engagement cylinder 23 standing on the upper surface of the ring member 3, and the overriding protrusion 13 is the jet head top plate 25. The liquid jet pump according to claim 1, wherein the second jet cylinder (29) is provided at a predetermined position on the back surface of the second engagement cylinder (29), and the crossover projection is provided on the peripheral surface of the second engagement cylinder (29).

A liquid jet pump according to a third aspect of the present invention is
The ejection head 6 has a vertical cylinder 24 fitted to the upper end of the stem.
And the peripheral wall 26 is hung from the peripheral portion of the top plate 25, and the tip end ejection port a of the nozzle cylinder 27 having the base end opened to the vertical cylinder 24 is projected to the outside of the peripheral wall 26. In the head, the overriding protrusion 12 is an overriding protrusion projecting on a peripheral surface forming an arcuate recess 35 formed in the upper surface of the ring member 3, and the overriding protrusion 13 is the jet head peripheral wall. 26. The liquid jet pump according to claim 1, wherein the liquid jet pump is a step-over protrusion that is provided at a predetermined position in 26 and is movable in the recess 35 as the head rotates.

Further, a fourth aspect of the invention is a method of screwing the jet head, wherein the jet head 6 is screwed in the liquid jet pump according to the first aspect, in which the top surface of the jet head 6 is rotated. The ejecting head 6 is attached to the ring member 3 by using the capper 34 that has the pressing plate portion 33 that pushes down while pushing it, and sets the stroke to the lowest position when the overriding protrusion 13 passes over the overriding protrusion 12. It is configured as a method of screwing the ejection head, which is characterized by screwing.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

As shown in the drawings, the liquid jet pump 1 of the present invention is used by mounting it on a container body 2 and the like. It has a cylinder 4 fitted with a ring member 3 at its upper end and an upper end from a cylinder upper end opening. An operating member A having an ejection head 6 fitted to the upper end of the stem 5 protruding in a urged state is provided so that the liquid in the mounted container body is sucked up by the vertical movement of the operating member and ejected from the ejection port a of the ejection head 6. In addition to being configured, it is configured such that it can be screwed and locked to the ring member 3 when the operating member A is pushed down.

As a method of mounting the pump 1 on the container body 2, a conventional pump mounting method of this type, in which the pump 1 is mounted and fixed to the container body by a mounting cylinder fitted to the outer periphery of the mouth and neck, can be adopted. Then, a flange-shaped top plate 9 extending from the upper end of the mounting cylinder 8 is rotatably sandwiched between the flange 7 protruding from the upper outer periphery of the cylinder 4 and the ring member 3 fitted to the upper end of the cylinder. With the flange 7 placed on the mouth / neck portion 11 via the packing 10, the mounting cylinder 8 is attached to the container body 2.
It is detachably attached to the container body 2 by being screwed onto the outer periphery of the mouth / neck portion 11.

The ring member 3 is a member to which the pushed down operation member A is screwed and locked in order to prevent the operation member A from being pushed down when it is not used for storage, transportation, etc., and prevent inadvertent leakage of liquid. Is. The screwing portion with the actuating member A can be variously adopted according to the form of the ejection head. For example, the outer peripheral surface is a screwing portion as in the embodiment of FIG. 1, or the inner peripheral surface is a screwing portion (not shown). Alternatively, the peripheral surface of the cylindrical portion protruding from the upper surface may be a threaded cylindrical portion, and the threaded portion may be screwed to the corresponding threaded cylindrical portion of the ejection head.

The ejection head 6 is fitted to the upper end of the stem 5, has an ejection port a which communicates with the inside of the stem 5, and is constructed so as to eject the liquid from the inside of the stem 5 from the ejection port a. By pressing the upper surface, the operating member A is pressed down against the upward biasing force. Also,
It is configured such that it can be screwed and locked to the ring member 3 in the depressed state, and screwed portions are formed at predetermined portions corresponding to the screwed portions of the ring member described above.

According to the present invention, in the liquid jet pump constructed as described above, the ride-over protrusion 12 provided at the predetermined position of the ring member 3 and the ride-over protrusion 13 provided at the predetermined position of the jet head 6 are provided. Provided, when the jet head 6 is screwed down,
The overcoming protrusion 13 is configured so as to reach a predetermined screwing level at the time when the overcoming protrusion 12 is passed over, and the predetermined opening torque can be obtained at that time.

The predetermined screwing level in this case is a screwing level at which a predetermined opening torque is obtained as described above, and the predetermined opening torque is unscrewed by a normal external force related to transportation, storage, etc., such as vibration. On the other hand, it is a torque that can be relatively easily performed when the ejection head 6 is rotated and screwed out by hand. The opening torque in this case is mainly related to the frictional force when the overriding protrusion 13 crosses over the overriding protrusion 12, and is also involved in the unscrewing between the threads of the screwed parts, between the piston and the cylinder, etc. The size of the frictional force depends on the frictional force and the like. still,
The predetermined screw release level is not a specific value, but a value having a width is considered.

Various forms can be adopted for the overriding protrusion 12 and the overhang protrusion 13 as long as the above requirements are met. However, as shown in the figure, the protrusion is formed on the cylindrical portion, or the protrusion is not shown. Various types such as a plate type, a plate type, and the like can be adopted, and a combination thereof can also be used.

Therefore, in the liquid jet pump 1 of the present invention, if the operating member A is rotated and lowered to the predetermined screwing level,
An appropriate opening torque can be applied at all times, and it is configured so as to prevent inconveniences such as excessive tightening that does not come off during use, and excessive looseness that causes the operating member A to screw out and rise when not in use.

A more specific description will be given below. In the embodiment shown in FIG. 1, the ring member 3 has a fitting cylinder 17 which is fitted to the outer circumference of the upper end of the cylinder 4 to prevent the projection from slipping upward due to the crossover engagement of the ridges. The donut plate-shaped top plate (18) having a window hole opened is hung from the back surface of the top plate (18), a peripheral wall (19) is hung downward from the outer peripheral edge of the top plate (18), and a screw thread (20) is provided around the outer periphery thereof. Further, an inner fitting cylinder 21 fitted to the inner surface of the cylinder 4 is vertically provided from the inside of the rear surface of the top plate 18, and a guide cylinder 22 for inserting the stem 5 is vertically provided below the inner peripheral edge portion of the top plate 18. I am configuring. Further, the first engagement cylinder 23 is erected from the inner peripheral edge of the upper surface of the top plate 18, and the ride-over projection portion 12 in the form of a ridge is projectingly provided at a predetermined position on the outer peripheral surface thereof.

The jet head 6 has a vertical cylinder 24 fitted on the upper end of the stem 5 vertically extending from the rear surface of the top plate 25 and a top plate 25.
A peripheral wall 26 is vertically provided from the peripheral edge portion, and further, a tip end ejection port a of a nozzle cylinder 27 having a base end opened to the vertical cylinder 24 is configured to project outward. Further, a thread 28 is provided around the inner wall of the peripheral wall 26,
With the operating member A pushed down, as shown in FIG. 2, the operating member A is configured to be screwed with the thread 28 of the ring member 3. Also,
A second engaging cylinder 29 is vertically provided at a predetermined position on the outside of the vertical cylinder 24, and an overhanging projection 13 in the form of a ridge is projectingly provided at a predetermined position on the inner peripheral surface thereof.
It is constructed so as to get over the above-mentioned crossover protrusion 13 at a predetermined screwing level.

A cylindrical piston 30 is linked to the lower end of the outer periphery of the stem 5, and a coil spring 31 for urging the operating member A upward is interposed on the lower surface of the stem 5.
Further, a suction valve (not shown) is provided at the lower end of the cylinder 4, and a discharge valve 32 is provided at the upper portion inside the stem 5. The internal structure of these pumps is not limited to this, and the structure of a conventional pump of this type can be adopted.

When filling the liquid jet pump constructed as described above with liquid, after filling the liquid in the container body 2, the liquid jet pump 1 is mounted as described above, and the jet head 6 is attached to the ring member 3. Screw it on.

Although the screwing can be carried out by various methods, in the present invention, as a method of screwing the jetting head 6 in such a pump, as shown in FIG. 4, the top surface of the jetting head 6 is rotated and pushed down. Having the pressing plate portion 33, the crossover protrusion portion
The capper set to the stroke L so that the pressing plate portion 33 is at the lowest position when the rideover portion 13 has passed over the projected portion 12.
34 is used to screw the ejection head 6 to the ring member 3.

In order to screw the thread 28 of the jet head 6 onto the thread 20 of the ring member 3, the operating member A is rotated and pushed down by the capper 34 as shown in FIG. 4 (a). Next, as the screwing progresses and the overcoming protrusion 13 crosses over the overriding protrusion 12, the screwing progresses to a predetermined lowest descending screwing level, and as shown in FIG. 4 (b), the pressing plate portion of the capper 34 is pushed. The descent of 33 stops and screwing is completed. At this time, the ejection head 6
It is preferable that the lower surface of the peripheral wall 26 and the lower surface of the second engagement cylinder 29 do not come into contact with the facing surface.

Further, when the liquid jet pump 1 is used, by depressing the operating member A from the state shown in FIG. 1, the pressurized liquid in the cylinder 4 opens the discharge valve 32 and is jetted from the jet port a. When the pushed down operating member A rises, the suction valve opens and sucks the liquid in the container body 2 into the cylinder.

FIG. 5 shows another embodiment of the present invention. In this embodiment, a recess 35 having an arcuate shape in a plan view is formed at the outer peripheral edge of the upper surface of the ring member 3, and the bottom surface is successively lowered. The above-mentioned overriding protrusion 12 is provided at a predetermined position on the peripheral surface forming 35. A pair of the recessed portion 35 and the overriding protrusion 12 are formed at symmetrical positions.

In addition, a plate-like carry-over projection 13 is projected downward from the outer edge of the lower surface of the reinforcing plate 36 which is laid between the upper inner surface of the peripheral wall 26 of the jet head 6 and the upper outer surface of the vertical cylinder 24. At the descending screwing level, it is configured so as to get over the overriding protrusion 12. The other structure is basically the same as that of the embodiment shown in FIG. 1, and the same reference numerals are given to omit the description. The operation is basically the same, and will not be repeated.

The material of each of the above-mentioned members is not particularly limited, but a synthetic resin is mainly used, and if necessary, a metal, an elastomer and the like can be used in combination to manufacture.

[0032]

As described above, the liquid jet pump according to the present invention is configured as described above, so that when the jet head is screwed, the jet head is rotated and lowered to the position where the crossover projection gets over the crossover projection. By doing so, a screwing end point can be obtained in that state, and a reliable screwing state can be maintained, and since the frictional force between the overriding protrusions and the like greatly contributes to the opening torque of the operating member, By appropriately selecting these factors such as shape and protrusion width, the open torque can always be stably controlled regardless of the tightening torque, and special torque control on the assembly line is not required, resulting in productivity improvement. Bring improvement. Further, the structure can be formed without complicating the structure as compared with the conventional product.

According to a fourth aspect of the present invention, there is provided a method of screwing a jet head, wherein the jet head of the liquid jet pump can be easily screwed to the ring member with a preferable opening torque.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing an embodiment of the present invention.

FIG. 2 is a partially cutaway side view showing a state in which the operating member of the embodiment is pushed down and locked.

FIG. 3 is an enlarged cross-sectional view of an essential part of the working example of the embodiment in a state where the operating member is pushed down and locked.

FIG. 4 is an explanatory diagram illustrating an operation of the embodiment.

FIG. 5 is a partially cutaway side view showing another embodiment of the present invention.

FIG. 6 is a perspective view showing a ring member of the embodiment.

[Explanation of symbols]

3 ... Ring member, 4 ... Cylinder, 5 ... Stem, 6 ... Jet head, 12 ... Overcoming projection, 13 ... Overcoming projection, 23 ... First engaging tube, 24 ... Vertical tube, 25 ... Jet head top plate, 26 ... Jet head peripheral wall, 27 ... Nozzle cylinder, 29 ... Second engagement cylinder, 33 ... Press plate part, 34
... Capper, 35 ... Recess, A ... Actuating member, a ... Jet port,

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 3E014 PA01 PB03 PC02 PC03 PD11                       PE02 PE10 PE14 PE15 PF10                 3E084 AA04 AA12 AA24 AB01 BA02                       CA01 CB03 CC03 DA01 DB12                       DC03 FA09 FB01 GA04 GB11                       HA03 HB09 HD01 KB01 LB02                       LB07 LC01 LD22

Claims (4)

[Claims] 1. A cylinder 4 having a ring member 3 fitted to an upper end thereof, and an operating member A having an ejection head 6 fitted to an upper end of a stem 5 protruding from an upper end opening of the cylinder in an upwardly biased state. A liquid jet pump configured such that liquid in a mounted container is sucked up by a vertical movement of a member to be jetted from a jet port a of a head, and can be screwed and locked to a ring member when an operating member is pushed down. The ring member 3 is provided with an overriding protrusion portion 12 provided at a predetermined position and an overtaking protrusion portion 13 provided at a predetermined position of the ejection head 6, and the overpass protrusion portion 13 is overridden when the ejection head is screwed down. A liquid jet pump characterized in that a predetermined screwing level is reached when the projection (12) is overcome. 2. The jet head 6 vertically extends a vertical cylinder 24 fitted to the upper end of the stem from the back surface of a top plate 25, and also has a top plate.
25 is a jet head in which a peripheral wall 26 is vertically provided from a peripheral edge portion, and a tip end jet outlet a of a nozzle cylinder 27 having a base end opened to the vertical cylinder 24 is projected to the outside of the peripheral wall 26. , The first engagement cylinder 23 standing upright on the upper surface of the ring member 3, which is a projecting-over projection protruding on the peripheral surface of the ring member 3. The crossover projecting section 13 is the second engagement which is vertically provided at a predetermined position on the back surface of the jet head top plate 25. The liquid ejecting pump according to claim 1, wherein the liquid ejecting pump is an overhanging projecting portion projecting on a peripheral surface of the cylinder 29. 3. The jet head 6 vertically extends a vertical cylinder 24 fitted to the upper end of the stem from the rear surface of a top plate 25, and also has a top plate.
25 is a jet head in which a peripheral wall 26 is vertically provided from a peripheral edge portion, and a tip end jet outlet a of a nozzle cylinder 27 having a base end opened to the vertical cylinder 24 is projected to the outside of the peripheral wall 26. , The ride-over protrusion projecting on the peripheral surface forming the arcuate recess 35 formed on the upper surface of the ring member 3, and the ride-over protrusion 13 projects at a predetermined position in the jet head peripheral wall 26, The liquid ejection pump according to claim 1, wherein the liquid ejection pump is a step-over protrusion that can move in the concave portion 35 as the shaft rotates. 4. A method of screwing the ejection head 6 in the liquid ejection pump according to claim 1, further comprising a pressing plate portion 33 for pushing down while ejecting the top surface of the ejection head 6, and further comprising the step-over collision. The capper 34 is set to the stroke that is at the lowest position when the part 13 gets over the overriding protrusion 12
A method of screwing a jet head to the ring member 3 by using the above method.