JP4137443B2 - 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]
Further, the operation member in these pumps is screwed and locked by, for example, a capper that pushes down the upper surface while rotating. The capper has a tightening torque set in advance and is configured to stop tightening when a predetermined value is reached. For example, the lower surface of the jet head peripheral wall is applied to the upper surface of the flange projecting below the thread of the ring member. At the point of contact, the 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 locked 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 screwed out relatively easily when used. However, in conventional pumps, the above-mentioned mechanical adjustment has a large variation in opening torque and is always appropriate. It is difficult to give a large opening torque.
[0006]
That is, the tightening torque cannot be controlled so accurately, and there is a tendency to set the control large for the purpose of preventing loosening. Therefore, the screwing end point where the lower surface of the jet head peripheral wall comes into contact with the upper surface of the flange of the ring member In this case, it is difficult to stop tightening immediately, it is pressed more than necessary, the contact area between them is large, the frictional force between them is larger, and the opening torque is much larger than planned There is a risk, and variations are likely to occur.
[0007]
The present invention has been made in view of the above points, and it is possible to greatly reduce the variation in opening torque, prevent the actuating member from being detached by an external force when not in use, and easily disengage the actuating member during 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]
[Means for Solving the Problems]
The first means is configured as follows: a cylinder 4 having a ring member 3 fitted to the upper end thereof, and a jet head 6 fitted to the upper end of a stem 5 projecting upward from the cylinder 4 upper end opening. The operating member 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, and the ring member 3 while the operating member A is pushed down. in Nishigigakaritome configured to be capable of liquid jet pump, the jet head 6, the stem longitudinal tube 24 while vertically from top plate 25 back surface which is fitted to the 5 upper peripheral wall 26 than the top plate 25 periphery , And an ejection head projecting outwardly from the distal end ejection port a of the nozzle cylinder 27 whose base end is opened to the vertical cylinder 24 , and the locking surface 13 formed upright on the ring member 3 ; Provided in the ejection head 6 and of the ejection head 6 In certain screwing level during moving downward is provided a torque adjusting section 12 composed of engaging projections 14 that are locked abutting engagement with the engaging surface 13, the engagement surface 13, the ring member 3 in the upper surface It is an end surface that forms an arc-shaped recess 23 that is recessed in the inner periphery of the short cylinder portion 35 that stands up at the peripheral edge , and the engagement projection 14 projects from the outer surface of the ejection head vertical cylinder 24 , and the ejection head 6. wherein the of a engagement projection that is movable said arcuate recess 23 with the rotation.
[0011]
The second means is configured as follows. That is, in the first means, the engagement surface 13 is formed on the peripheral surface forming the arcuate recess 23 at the screwing level immediately before the engagement surface 13 and the engagement protrusion 14 abut. A loosening prevention protrusion 16 over which the mating protrusion 14 gets over is provided.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0013]
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.
[0014]
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.
[0015]
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 employed in accordance with the form of the ejection head. For example, the outer peripheral surface can be a screwed portion as in the embodiment of FIG. 1, or the inner peripheral surface as in the embodiment of FIG. Although not shown, the peripheral surface of the cylindrical portion protruding from the upper surface can be used as the screw tube portion, and the screw portion may be screwed to the screw tube portion of the corresponding ejection head.
[0016]
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 so as to be able to be screwed and locked in the depressed state, and screwed portions are respectively formed in portions corresponding to the screwed portions of the ring member.
[0017]
In the present invention, the torque adjusting unit 12 is provided in the liquid jet pump configured as described above. The torque adjustment unit 12 includes a locking surface 13 formed upright on the ring member 3 and an engagement protrusion 14 provided on the ejection head 6 , and a predetermined screwing level when the ejection head is lowered. In this case, the engaging projection 14 is configured to be brought into contact with and locked to the locking surface 13, and is configured to obtain a predetermined opening torque at that time.
[0018]
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, when the ejection head 6 is rotated by hand and screwed, it means a torque that can be relatively easily performed. The opening torque depends on the frictional force involved in other screwing between the piston and the cylinder, etc., mainly due to the frictional force between the threads at the screwed part. Is set. Note that the predetermined threading level is not a specific value but a value having a width.
[0019]
By providing this torque adjusting portion 12, it is possible to prevent further rotation of the actuating member A when the engaging projection 14 abuts against the locking surface 13 regardless of the magnitude of the tightening torque. The frictional force in a wide area between the lower surface of the conventional peripheral wall of the head and the upper surface of the flange does not contribute to the opening torque, and the opening torque can be managed at all times in a desirable state. The operating member A is configured to prevent inconveniences such as the operating member A being screwed up during use.
[0020]
Further, in the present invention, at the screwing level immediately before the locking surface 13 and the engaging protrusion 14 come into contact with each other, the loosening preventing protrusion 16 that the overpass protrusion 15 provided on the ejection head 6 gets over. and it can be performed more preferable torque management when provided in the ring member (3).
[0021]
By providing such an overpass projection 15 and a loosening prevention projection 16, the frictional force between the overpass projection and the loosening prevention projection is greatly involved in the opening torque of the actuating member A. By appropriately selecting factors such as the protrusion width, the opening torque can be managed constantly and stably regardless of the tightening torque.
[0022]
Form of Norikoshi projection 15 and loosening prevention protrusion 16 can take various forms satisfies the above requirements, for example, each collision in a cylindrical portion which is vertically in the cylindrical portion及 beauty injection head projecting from the ring member upper surface Although it is possible to use a projecting ridge shape, or a projection shape, etc., as shown in the illustration, if the engagement projection 14 is also used as the overpass projection 15, the structural complexity can be eliminated, and more preferable.
[0023]
More specific description will be given below. In the embodiment shown in FIG. 1, the ring member 3 includes a fitting tube 17 fitted to the outer periphery of the upper end of the cylinder 4 by preventing over-extension by mutual engagement between protrusions, and a top plate 18 having a donut plate shape. In addition to being suspended from the back surface, a peripheral wall 19 is suspended downward from the outer peripheral edge of the top plate 18, and a screw thread 20 is circumferentially provided on 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.
[0024]
Further, a concave portion 23 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, and one end surface that forms the concave portion is configured as a locking surface 13, and immediately before the locking surface 13 The loosening-preventing protrusion 16 is provided on the peripheral surface forming the recess 23. A pair of the recess 23, the locking surface 13, and the loosening prevention protrusion 16 are formed at symmetrical positions.
[0025]
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 thread 28 is provided around the inner peripheral lower portion of the peripheral wall 26, and is configured to be screwed with the thread 20 of the ring member 3 as shown in FIG. In addition, a plate-like engagement protrusion 14 is provided below the outer edge of the lower surface of the reinforcing plate 29 spanned between the inner surface upper part of the peripheral wall 26 and the outer surface upper part of the vertical cylinder 24 so as to reach a predetermined screwing level. However, it is configured to abut and engage with the engaging surface 13. A pair of the engaging protrusions 14 are also provided at symmetrical positions.
[0026]
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 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 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.
[0027]
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. . For example, as shown in FIG. 5, the operating member A is pushed down while being rotated by the capper 33, and the screw 28 of the ejection head 6 is screwed onto the screw 20 of the ring member 3. As the screwing progresses, the engaging protrusion 14 gets over the loosening prevention protrusion 16 and reaches the predetermined screwing level when it is brought into contact with and locked to the locking surface 13, and the operation member A is further rotated. When a preset numerical value is reached, the pressing plate 34 of the capper 33 is idled, and after a predetermined time has elapsed, the pump on the line moves. At this time, the lower surface of the peripheral wall of the ejection head may be configured not to contact the opposing surface.
[0028]
Further, when the liquid jet pump 1 is used, for example, by depressing the operating member A from the state of FIG. 1, the pressurized liquid in the cylinder 4 opens the discharge valve 32 and is ejected from the jet outlet a. 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. 6 shows another embodiment of the present invention . In this embodiment, the threaded portion is provided on the inner peripheral surface portion of the ring member 3, and the locking surface 13 and the protrusion for preventing looseness are shown. An example in which the concave portion 23 forming the portion 16 is formed in the inner peripheral edge portion of the ring member 3 is shown.
[0030]
In this embodiment, the ring member 3 includes a fitting tube 17 that is fitted on the outer periphery of the upper end of the cylinder 4 by preventing over-extraction by means of a mutual engagement between protrusions. Further, the peripheral wall 19 is suspended downward from the outer peripheral edge of the top plate 18, and the guide cylinder 22 is inserted through the stem 5 while being fitted to the inner surface of the cylinder 4 from the inner peripheral edge of the back surface of the top plate 18. The screw 20 is formed on the upper portion of the guide tube 22.
[0031]
In addition, a concave portion 23 having a circular arc shape in plan view in which the bottom surface sequentially descends is formed on the inner periphery of the short cylindrical portion 35 standing on the inner peripheral edge of the upper surface, and one end surface forming the concave portion is configured as a locking surface 13. The loosening prevention protrusion 16 is provided on the peripheral surface forming the recess 23 immediately before the locking surface 13. A pair of the recess 23, the locking surface 13, and the loosening prevention protrusion 16 are formed at symmetrical positions.
[0032]
The basic structure of the ejection head 6 is the same as that of the above-described embodiment. In this embodiment, a screw 28 is provided around the lower outer periphery of the vertical cylinder 24 which is the upper outer periphery of the actuating member A, as shown in FIG. In this manner, the operating member A is configured to be screwed with the thread 20 of the ring member 3 in a state where the operating member A is pushed down. Further, the plate-like engaging protrusion 14 serving also as the riding over protrusion 15 is provided on the outer surface of the vertical cylinder 24 above the screw 28, and is brought into contact with and locked to the locking surface 13 at a predetermined screwing level. It is configured as follows. Also in the case of the present embodiment, the operation when the actuating member A is screwed is the same as that of the above embodiment, and the description thereof is omitted.
[0033]
In addition, although the material of each said member is not specifically limited, A synthetic resin is mainly used and it can manufacture by using a metal, an elastomer, etc. together as needed.
[0034]
【The invention's effect】
As described above, since the liquid jet pump of the present invention has the above-described configuration, it becomes possible to reduce variation in the opening torque adjusted by the management of the tightening torque, and the operating member is detached by an external force when not in use. In addition, it is possible to obtain the operational stability that the actuating member can be easily screwed off during use, and the structure can be formed without complication even when compared with conventional products. Special torque management is not required, resulting in improved productivity.
[0035]
The liquid jet pump of the second means, the frictional force or the like between Norikoshi peaks and loosening prevention protrusion is largely responsible for the opening torque of the actuating member A, their shape, the elements such as protrusion width appropriately By selecting, the opening torque can be constantly managed stably regardless of the tightening torque.
[Brief description of the drawings]
FIG. 1 is a partially cutaway side view showing an embodiment of the present invention.
FIG. 2 is a perspective view showing a ring member of the embodiment.
FIG. 3 is a plan view showing a ring member of the same embodiment.
FIG. 4 is a partially cutaway side view showing a state in which the operating member of the embodiment is locked down.
FIG. 5 is an explanatory diagram for explaining the operation of the embodiment;
FIG. 6 is a partially cutaway side view showing another embodiment of the present invention.
FIG. 7 is a perspective view showing a ring member of the same embodiment.
FIG. 8 is a partially cutaway side view showing a state where the operating member of the embodiment is locked down.
[Explanation of symbols]
3 ... Ring member, 4 ... Cylinder, 5 ... Stem, 6 ... Ejection head,
12 ... Torque adjustment part, 13 ... Locking surface, 14 ... Engagement protrusion, 15 ... Passover protrusion,
16 ... Loosening prevention protrusion, 18 ... Ring member top plate, 19 ... Ring member peripheral wall,
23 ... arc-shaped recess, 26 ... jet head peripheral wall, 24 ... vertical cylinder, 27 ... nozzle cylinder,
A ... Actuating member, a ... Outlet,

Claims (2)

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) protruding 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). ) Projecting outwardly, and is provided on the ring member (3), the locking surface (13) standing upright, and the ejection head (6) and when the ejection head (6) is screwed down. Predetermined screwing Provided with a torque adjusting portion (12) comprising an engaging protrusion (14) that abuts and locks with the locking surface (13), and the locking surface (13) is provided with a ring member (3 ) Is an end surface forming an arcuate recess (23) recessed in the inner periphery of the short cylindrical portion (35) upstanding on the inner peripheral edge of the upper surface , the engagement protrusion (14) is a jet head vertical cylinder ( 24) A liquid jet pump characterized in that it is an engaging projection that protrudes from the outer surface and is capable of moving the arcuate recess (23) as the jet head (6) rotates. The engagement protrusion (14) is formed on the circumferential surface forming the arc-shaped recess (23) at a screwing level immediately before the engagement surface (13) and the engagement protrusion (14) abut. 2. A liquid jet pump according to claim 1, further comprising a protrusion (16) for preventing loosening.

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