JP4232885B2 - 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 jet pump, it has an operating member formed by fitting the jet head to the upper end of a stem that protrudes so as to be pushed down from the upper end of the cylinder so that it can be pushed down. Thus, it is known that the liquid contained in the mounted container is ejected from the ejection port of the ejection head.
[0003]
These are the states in which the operating member is pushed down on the ring member fitted to the upper end of the cylinder for the purpose of preventing the pressing of the operating member due to external force during storage and transportation, and preventing inadvertent liquid dispensing. Generally, it is configured to be able to be screwed and locked. For example, the thread provided on the outer periphery of the ring member is screwed and locked by screwing the thread provided on the inner periphery of the peripheral wall of the ejection head.
[0004]
Also, threaded locking of at actuating members of these pumps, for example, by capper depressing while rotating the top surface thereof. The capper is set so that the tightening torque is set in advance, and the tightening is stopped when a predetermined value is reached. At that time, tightening is stopped and the end of screwing is set. On the other hand, the opening torque is adjusted by managing the tightening torque of the capper.
[0005]
[Problems to be solved by the invention]
If these operating members are screwed and tightened loosely, there is a risk that they will come off during storage, transportation, etc. On the other hand, if the tightening is too strong, screwing becomes difficult during use. Therefore, it is preferable to adjust the torque appropriately so that it does not come off when not in use and can be easily screwed off when used. However, in conventional pumps, the mechanical adjustment described above has a large variation in open torque and is always appropriate. It is difficult to give an open torque.
[0006]
That is, the tightening torque cannot be controlled with such high accuracy, and the control value tends to be set large to prevent loosening. At the end point, it is difficult to stop tightening immediately, and it is pressed more than necessary, and because the contact area between the two pressed together is large, the frictional force is larger and the opening torque is much higher than the expected one There is a risk that it will become large, and variations are likely to occur.
[0007]
The present invention has been made in view of the above points, and it is possible to extremely reduce the variation in open torque, prevent the operating member from being detached by an external force when not in use, and easily remove the operating member when in use. In addition, the structure can be formed without complication even when compared with conventional products, and no special torque management in the assembly line is required. The present invention proposes an excellent liquid jet pump that brings about improvement.
[0008]
Another object of the present invention is to propose a thread screwing method in such a liquid jet pump, in which the jet head can be easily screwed to the ring member in a preferable open torque state. It is.
[0009]
[Means for Solving the Problems]
The first means is configured as follows. That is, a cylinder 4 having a ring member 3 fitted to the upper end thereof and an operating member A having an ejection head 6 fitted to the upper end of a stem 5 protruding in an upward biased state from the upper end opening of the cylinder 4 are provided. The liquid jet is constructed such that the liquid in the container mounted by the up and down movement is sucked up and ejected from the jet outlet a of the jet head 6 and can be screwed and locked to the ring member 3 when the operating member A is pushed down. In the pump, the ejection head 6 suspends a vertical cylinder 24 fitted to the upper end of the stem 5 from the back surface of the top plate 25, and a peripheral wall 26 from the peripheral edge of the top plate 25. A jet head that protrudes outward from the peripheral wall 26 at the distal end outlet a of the nozzle cylinder 27 having an open base end, and a to-be-passed protrusion that protrudes from the circumferential surface of the first engagement cylinder 23 that is erected on the upper surface of the ring member 3 12 and the peripheral surface of the second engagement cylinder 29 suspended from the back surface of the ejection head top plate 25 And Norikoshi projection 13 projecting from the provided upon threadedly downward ejection head Norikoshi projection 13 is provided with a torque adjuster to overcome the Norikoshi projection 12.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0014]
As shown in the drawings, the liquid jet pump 1 according to the present invention is used by being mounted on a container body 2 or the like, and a cylinder 4 having a ring member 3 fitted to the upper end thereof and an upward biased state from the cylinder upper end opening. And an operating member A fitted with a jet head 6 at the upper end of the protruding stem 5, and is configured to suck up the liquid in the mounted container body by the vertical movement of the operating member and eject it from the jet outlet a of the jet head 6. The operation member A is configured to be able to be screwed and locked to the ring member 3 in a pressed state.
[0015]
As a mounting method of the pump 1 to the container body 2, a conventional pump mounting method of this type in which the pump body 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 employed. A flange-like top plate 9 extending from the upper end of the mounting cylinder 8 is rotatably held between the flange 7 projecting from the upper outer periphery of the ring 4 and the ring member 3 fitted to the upper end of the cylinder. The mounting cylinder 8 is screwed onto the outer periphery of the mouth / neck portion 11 of the container body 2 and is detachably mounted on the container body 2 while being placed on the mouth / neck section 11 via the packing 10.
[0016]
The ring member 3 is used for screwing and locking the depressed operating member A in order to prevent the actuating member A from being pushed down when not in use, such as storage and transportation, and to prevent inadvertent leakage of liquid. Various screwed portions with the actuating member A can be adopted in accordance with the form of the ejection head. For example, the outer peripheral surface is a screwed portion as in the embodiment of FIG. 1, or the inner peripheral surface is a screwed portion although not shown. Alternatively, the peripheral surface of the cylindrical portion projecting from the upper surface can be used as a screw tube portion, and it is preferable that the screw portion is screwed to the screw tube portion of the corresponding ejection head.
[0017]
The ejection head 6 is fitted to the upper end of the stem 5 and includes an ejection port a communicating with the inside of the stem 5. The ejection head 6 is configured to eject liquid from the stem 5 from the ejection port a and presses the upper surface thereof. By doing so, the actuating member A is pushed down against the upward biasing force. Further, the ring member 3 is configured to be screwed and locked in the depressed state, and the screwed portions are respectively formed in the predetermined portions corresponding to the screwed portions of the ring member.
[0018]
In the present invention, in the liquid ejection pump configured as described above, the ring member 3 is provided with the overpass projection 12 and the ejection head 6 is provided with the overpass projection 13, and when the ejection head 6 is screwed down. In addition, it is configured to reach a predetermined screwing level when the ride-over protrusion 13 gets over the over-passage protrusion 12 and is configured to obtain a predetermined open torque at that time.
[0019]
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 may be screwed off by a normal external force related to transportation, storage, etc., for example, vibration. On the other hand, it refers to a torque that can be relatively easily performed when the ejection head 6 is rotated and screwed by hand. The opening torque in this case is mainly related to the frictional force when the overpass projection 13 gets over the overpass projection 12 and other factors, such as between the threads of the screwed part and between the piston and cylinder. Since the magnitude depends on the frictional force, etc., the setting is made in consideration of these. Note that the predetermined threading level is not a specific value but a value having a width.
[0020]
Various forms can be adopted as the form of the overpassing protrusion 12 and the overpassing protrusion 13 as long as the above-mentioned requirements are satisfied. Alternatively, various types of plates can be used, and a combination of these can also be used.
[0021]
Accordingly, the present invention liquid jet pump 1, if the actuating member A is the predetermined screwing level until in turning downward, it is possible to impart constantly proper opening torque, may not come off in use by over-tighten, loose It is so configured that it is possible to prevent inconveniences such as the operation member A being screwed up when not in use.
[0022]
More specific description will be given below. In the embodiment shown in FIG. 1, the ring member 3 has a fitting tube 17 fitted on the outer periphery of the upper end of the cylinder 4 so as not to be pulled upward by a mutual overpass engagement. The bottom wall 18 is suspended from the rear surface of the top plate 18 having a donut plate shape with a window hole opened, and the peripheral wall 19 is suspended downward from the outer peripheral edge of the top plate 18, and the 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 suspended from the inner side of the back surface of the top plate 18, and a guide cylinder 22 that passes through the stem 5 is suspended downward from the inner peripheral edge of the top plate 18. It is composed. Further, the first engagement cylinder 23 is erected from the inner peripheral edge of the upper surface of the top plate 18, and the overpass projection 12 in the form of a ridge is provided on the outer peripheral surface of the first engagement cylinder 23.
[0023]
The ejection head 6 has a vertical cylinder 24 fitted to the upper end of the stem 5 suspended from the back surface of the top plate 25, a peripheral wall 26 suspended from the periphery of the top plate 25, and a nozzle having a base end opened to the vertical cylinder 24. The tip outlet port a of the tube 27 is configured to protrude outward. Further, a screw 28 is provided around the inner peripheral lower portion of the peripheral wall 26, and is configured to be screwed with the screw 28 of the ring member 3 as shown in FIG. Further, a second engagement cylinder 29 is suspended from the outer side of the vertical cylinder 24 , and an overpass projection 13 in the form of a ridge is provided on the inner peripheral surface of the second engagement cylinder 29 at the predetermined screwing level. It is configured to get over the protrusion 13.
[0024]
A cylindrical piston 30 is linked to the lower end of the outer periphery of the stem 5, and a coil spring 31 for biasing the actuating 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 part in the stem 5. Of course, the internal structure of these pumps is not limited to this, and the configuration of this type of conventional pump can be employed.
[0025]
When the liquid jet pump configured as described above is filled with the liquid, after the liquid is filled in the container body 2, the liquid jet pump 1 is mounted as described above, and the jet head 6 is screwed to the ring member 3. .
[0026]
The screwing can be performed by various methods. In the present invention, as a screwing method of the ejection head 6 in such a pump, as shown in FIG. 4, a pressing plate portion that pushes down the top surface of the ejection head 6 while rotating it. And the ring member 3 of the ejection head 6 using a capper 34 set at a stroke L such that the pressing plate 33 is in the lowest lowered position when the above-described overpass projection 13 has passed over the overpass projection 12. It is configured so as to be screwed on.
[0027]
In order to screw the screw 28 of the ejection head 6 onto the screw 20 of the ring member 3, the operating member A is pushed down while being rotated by the capper 34, as shown in FIG. Next, when the screwing progresses and the overpassing protrusion 13 gets over the overpassing protrusion 12, the screwing proceeds to a predetermined lowest screwing level, and as shown in FIG. The descent of 33 stops and the screwing is completed. At this time, it is preferable that the lower surface of the peripheral wall 26 of the ejection head 6 and the lower surface of the second engagement cylinder 29 be configured not to contact the opposing surface.
[0028]
Further, when the liquid jet pump 1 is used, the pressurizing liquid in the cylinder 4 is opened from the discharge valve 32 by pushing down the operating member A from the state of FIG. When the actuating member A is raised, the suction valve is opened to suck the liquid in the container body 2 into the cylinder.
[0029]
FIG. 5 shows another embodiment of the present invention. In this embodiment, a concave portion 35 having a circular arc shape in plan view in which the bottom surface sequentially descends is formed on the outer peripheral edge of the upper surface of the ring member 3, and the concave portion 35 is formed. The above-described overpass projection 12 is provided on the peripheral surface . A pair of the recess 35 and the overpass projection 12 are formed at symmetrical positions.
[0030]
Further, a plate-shaped overpass projection 13 is provided below the outer edge of the lower surface of the reinforcing plate 36 that spans between the inner surface of the peripheral wall 26 of the ejection head 6 and the outer surface of the vertical cylinder 24, and is screwed downward. It is configured to get over the overpassed protrusion 12 at the level. The other configuration is basically the same as that of the embodiment of FIG. Also, the operation is basically the same and will be omitted.
[0031]
In addition, although the material of each said member is not specifically limited, A synthetic resin is mainly used and it can manufacture using a metal, an elastomer, etc. together as needed.
[0032]
【The invention's effect】
As described above, the liquid jet pump according to the present invention has the above-described configuration, so that when the jet head is rotated and lowered to the position where the ride-over projection protrudes over the overpass projection when the jet head is screwed, Since the screwing end point can be obtained in a state and a reliable screwing state can be maintained, and the frictional force between the overpassing protrusion is greatly involved in the opening torque of the operating member, these shapes and protrusions By appropriately selecting factors such as the width, the open torque can be always stably managed regardless of the tightening torque, and no special torque management in the assembly line is required, resulting in improved productivity. Further, the structure can be formed without complication even when compared with the conventional product.
[Brief description of the 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 where the operating member of the embodiment is locked down.
FIG. 3 is an enlarged cross-sectional view of a main part in a state where the operating member of the embodiment is locked down.
FIG. 4 is an explanatory diagram for explaining the 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 same embodiment.
[Explanation of symbols]
3 ... Ring member, 4 ... Cylinder, 5 ... Stem, 6 ... Ejection head,
12 ... Overpassing projection, 13 ... Passing over projection, 23 ... First engaging cylinder, 24 ... Vertical cylinder,
25 ... Ejection head top plate, 26 ... Ejection head peripheral wall, 27 ... Nozzle cylinder,
29 ... second engaging cylinder, 33 ... pressing plate, 34 ... capper, 35 ... concave,
A ... Actuating member, a ... Spout,

Claims (1)

A cylinder (4) with a ring member (3) fitted to the upper end, and an operating member with a jet head (6) fitted to the upper end of a stem (5) projecting upward from the cylinder (4) upper end opening (A) is configured to suck up the liquid in the container body mounted by the vertical movement of the operating member (A) and eject the liquid from the ejection port (a) of the ejection head (6). In the liquid jet pump configured to be able to be screwed and locked to the ring member (3) in the depressed state, the jet head (6) has a vertical cylinder (24) fitted to the upper end of the stem (5) as a top plate. (25) The tip jet outlet (a) of the nozzle cylinder (27) is suspended from the back surface, the peripheral wall (26) is suspended from the peripheral edge of the top plate (25), and the base end is opened to the vertical cylinder (24). ) Is an ejection head projecting outwardly from the peripheral wall (26), and the overpass projection (12) projecting from the circumferential surface of the first engagement tube (23) standing on the upper surface of the ring member (3) , head top plate (25) and vertically to the back surface Norikoshi projections projecting from the peripheral surface of 2 Kakarigoto (29) and (13) is provided, the torque adjuster Norikoshi projection when threadedly lowering the injection head (13) to overcome the Norikoshi protrusion (12) liquid jet pump, characterized in that the provided.

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