JP3569384B2 - Bellows pump with down nozzle head - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bellows pump having a down nozzle head for a liquid discharging container.
[0002]
[Prior art]
In general bellows pumps, a suction port provided with a suction valve and a discharge port provided with a discharge valve are connected to a bellows. It is made to send out.
[0003]
[Problems to be solved by the invention]
Recently, in such a bellows pump, a pump provided with a press-down nozzle head at the upper end of the bellows and used by being attached to the mouth and neck of the container body has been considered.
(1) The direction of the nozzle is not constant during assembly, and therefore, the direction of the nozzle is not constant even when the nozzle is attached to the mouth and neck of the container.
(2 ) When used in a liquid dispensing container as a product containing the contents, the direction of the nozzle in each product will be different, and the bellows will be exposed, making it look bad, which can lead to an image down of the contents There is.
Due to the bendability of the three bellows, the position and direction of the nozzle are unstable, difficult to operate, and difficult to use.
4 The pushing state is not constant, and it is difficult to dispense a fixed amount. There are problems such as.
The present invention seeks to solve these problems.
[0004]
[Means for Solving the Problems]
As a first means , a base cylinder 1 having a suction pipe 2 suspended from a lower end is provided, a suction valve 3 communicating with the suction pipe 2 is provided in the base cylinder 1, and the suction pipe 3 is provided in the base cylinder 1. A bellows fitting portion 4 surrounding the valve 3 is provided, and a bellows 5 for fitting a lower end fitting portion 6 in an airtight and watertight manner is provided in the bellows fitting portion 4, and an upper end fitting portion 7 of the bellows 5 is provided on the bellows 5. A press-down nozzle head 9 having a discharge valve 8 therein and a nozzle 10 protruding forward is fitted in a certain direction, and a space between the bellows fitting portion 4 and a lower end fitting portion 6 of the bellows 5 is provided. Then, a fixed direction restricting means 11 is provided so as to be fitted in a fixed direction corresponding to the press-down nozzle head 9, and an actuator cylinder 12 covering the bellows 5 from the press-down nozzle head 9 is vertically provided. The cylinder 12 is slidable up and down inside the base cylinder 1 Characterized in that was impossible fitted.
[0005]
As a second means, in the first means , a direction setting concave groove 13 is provided on the lower surface of the base cylinder 1 as the fixed direction regulating means 11, and a lower portion of the bellows fitting portion 4 and the bellows 5 are provided. A plurality of engaging projections 14 and a plurality of engaging recesses 15 are arranged at unequal pitches between the lower end fitting portion 6 and the lower edge of the lower end fitting portion 6. The base cylinder 1 is engaged based on a fixed direction setting. (Claim 1)
[0006]
As a third means, in the first or second means , an engaging ridge is provided on the outer edge of the actuator cylinder 12 vertically extending from the press-down nozzle head 9 on the outer edge thereof. An engagement cylinder 16 is vertically provided, and an inner surface of an upper end portion of the actuator cylinder 12 having a locking ridge 17 laterally provided on an inner surface of the engagement cylinder 16 is fitted and engaged. A notch window 18 is provided at the front edge of the notch window, and the locking ridge 17 is deficiently permeable to the notch window 18 portion, and the upper portion of the notch window 18 is engaged with the base of the nozzle 10; The lower part of the cutout window 18 is formed as a vent hole inside and outside the actuator cylinder. (Claim 2)
[0007]
As a fourth means, in the first, second or third means, a lower end portion of the actuator cylinder 12 is formed in a large-diameter portion 19 with a step, and the large-diameter portion 19 with a step is connected to the base cylinder. 1 and a plurality of guide longitudinal grooves 20 and guide longitudinal protrusions 21 are formed so as to correspond to each other so as to be non-rotatably engaged with each other. The upper end of the base cylinder 1 is provided with a mounting cylinder 22 to be attached to the mouth-neck portion Aa of the container A, and the stepped large-diameter portion 19 is prevented from falling off at the inner periphery of the mounting cylinder 22. (Claim 3)
[0008]
As a fifth means, in the first, second, third or fourth means , an obliquely downward elastic flange 23 is integrally provided around the outer periphery of the lower end fitting portion 6 of the bellows 5, and the obliquely downward elastic flange 23 is provided. The elastic flange 23 is formed by pressing the base cylinder 1 into an upright cylinder 24 erected outside the bellows fitting portion 4. (Claim 4)
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
The drawings show a bellows pump with a down nozzle head made of synthetic resin according to an embodiment of the present invention .
In the drawing, 1 is a base cylinder having a suction pipe 2 suspended from the lower end, 3 is a suction valve provided in the base cylinder 1 in communication with the suction pipe 2, and 4 is a base valve in the base cylinder 1. The bellows fitting portion 5 surrounding the suction valve 3 is a bellows in which a lower end fitting portion 6 is fitted to the bellows fitting portion 4 in an airtight and watertight manner. The discharge valve 9 provided in the upper end fitting portion 7 is a push-down nozzle head fitted in a fixed direction on the outer periphery of the upper end fitting portion 7 of the bellows 5 and has a nozzle 10 projecting forward.
Reference numeral 11 denotes a fixed direction restricting means provided between the bellows fitting portion 4 fitted in a fixed direction corresponding to the press-down nozzle head 9 and a lower end fitting portion 6 of the bellows 5, and 12 denotes a press-down nozzle head. An actuator cylinder vertically extending from 9 to cover the bellows 5 and is fitted in the base cylinder 1 so as to be vertically slidable and non-rotatable.
[0010]
The base tube 1 is fitted into the mouth and neck portion Aa of the container body A, and is formed in a cup shape to facilitate the insertion, and the middle portion of the bottom wall 25 is bulged upward into a two-stage tube. The upper cylinder is the bellows fitting portion 4, and the upright cylinder 24 for holding down the bellows 5 from the lower cylinder is provided upright. Then, a fitting small tube 27 is suspended from the center of the bulging bottom portion 26 in the bellows fitting portion 4, and the upper end of the suction pipe 2 is fitted to the outer periphery of the fitting small tube 27 so as to be suspended. ing. An outer flange 28 is provided at the upper end of the base cylinder 1 so as to be in contact with the top surface of the mouth-neck portion Aa of the container body A. A reverse hook ridge 29 for pressing against the inner periphery of the neck portion Aa is provided around, and a plurality of receiving pieces 30 for abutting the actuator cylinder 12 on the inner peripheral surface of the bottom wall 25 are provided.
[0011]
The suction valve 3 is provided with a tapered valve seat 31 at an upper end portion in the fitting small cylinder 27, and a rod-shaped valve body 32 having a spherical valve portion 33 formed at an intermediate portion is movably seated on the tapered valve seat 31. Further, a plurality of valve element retaining members 34 are provided upright from the bulging bottom portion 26 in the bellows fitting portion 4.
The bellows 5 has a lower end fitting portion 6 formed to have a large diameter corresponding to the bellows fitting portion 4, and an obliquely downward elastic flange 23 is integrally provided around the outer periphery of the lower end fitting portion 6, and the obliquely downward elastic portion 23 is provided. The flange 23 is pressed into the upright cylinder 24. Further, the upper end fitting portion 7 is formed to have a small diameter so as to be fitted into the fitting vertical cylinder 35 of the press-down nozzle head 9, and a cutout opening 36 is formed at the front edge to open the nozzle 10 of the press-down nozzle head 9. ing.
The discharge valve 8 is provided with a tapered valve seat 37 at a lower end in the upper end fitting portion 7 of the bellows 5, and a rod-shaped valve body 38 having a spherical valve portion 39 formed at an intermediate portion on the tapered valve seat 37 so as to be movable. It is made to sit.
The press-down nozzle head 9 has the fitting vertical tube 35 suspended from the center of the inner surface of the head 40, and a nozzle 10 protrudes from the front surface by communicating the upper end portion and the base of the fitting vertical tube 35 with each other. A short stopper 41 is suspended from the head 40 inside the fitting tube 35, and the stopper 41 is fitted to the inner periphery of the tip of the upper fitting part 7 of the bellows 5. Prevents deformation. Further, an engaging cylinder 16 is suspended from the head 40 outside the fitting vertical cylinder 35, and the inner periphery of the upper end portion of the actuator cylinder 12 having the locking ridge 17 provided laterally on the engaging cylinder 16 is engaged. A notch window 18 is provided at the front edge of the actuator cylinder 12, and the notch window 18 is engaged with the base of the nozzle 10.
[0012]
The constant direction restricting means 11 is provided between a direction setting groove 13 (FIG. 3) provided on the lower surface of the base cylinder 1 and a lower portion of the bellows fitting portion 4 and a lower edge of the lower end fitting portion 6 of the bellows 5. It includes three engaging projections 14 and three engaging recesses 15 formed at corresponding unequal pitches (or unequal angular intervals) (FIG. 4).
In the assembly line, the base cylinder 1 is held in a specific direction (or angle) by the action of the direction setting groove 13. The bellows 5 is fixed to the base cylinder 1 only in a specific direction (or angle) with reference to a fixed direction setting of the base cylinder 1 by the direction setting groove 13. In a preferred embodiment, as shown in FIG. 5, a guide rail B having a rectangular cross section is provided on the assembling conveyance line, and the direction setting groove 13 on the lower surface of the base cylinder 1 is fitted to the guide rail B. Then, the fixed direction of the base cylinder 1 is set, and the bellows 5 is assembled in the fixed direction based on this. In another preferred embodiment, in order to maintain the stability of the base cylinder 1, a shuttle C shown in FIG.
Although the three unequal pitches are set to 150 degrees, 150 degrees, and 60 degrees (FIG. 4), the present invention is not limited to this and is appropriate in design. In addition, the engaging projections 14 located at locations with a large interval are made thicker from the viewpoint of strength, and the corresponding engaging recesses 15 are also adapted to the thickness.
[0013]
The actuator cylinder 12 has a vent hole for preventing a pressure difference between the inside and the outside of the cylinder. Preferably, the vent hole is formed in a place where external water hardly enters the inside of the actuator tube 12 (for example, immediately below the depression nozzle head or the nozzle). For example, in the embodiment of FIG. 1, the locking ridge 17 is provided laterally on the inner periphery of the upper end portion, and the cutout window 18 is provided at the front edge. The upper portion of the cut-out window 18 is engaged with the base of the nozzle 10 so that it can be ventilated, and the lower portion serves as a vent that communicates with the inside and outside of the actuator cylinder. However, in the illustrated embodiment, the notched windows 18 are arranged at three locations at equal intervals together with the guide vertical groove 20 to allow flexibility in the direction of assembly and increase the number of ventilation holes. The lack of the locking ridge 17 at these vents and the cut-out window 18 prevents internal and external air from entering and exiting when the actuator cylinder 12 is moved up and down, thereby preventing the internal air from being pressurized and negatively pressurized. Enables smooth lifting.
The lower end of the actuator cylinder 12 is formed as a stepped large-diameter portion 19, and the stepped large-diameter portion 19 is fitted to the inner periphery of the base cylinder 1 so as to be slidable up and down. In this fitting, the three guide vertical grooves 20 and the guide vertical ridges 21 formed at a correspondingly equal interval are engaged when the press-down nozzle head is pressed down, so that the press-down nozzle head 9 and the actuator The cylinder 12 does not rotate. Further, a mounting cylinder 22 to be attached to the mouth-neck portion Aa of the container body A is provided at the upper end of the base cylinder 1, and the stepped large-diameter portion 19 is prevented from falling off at an inner peripheral portion of the mounting cylinder 22. In the figure, reference numerals 47 and 48 denote play.
The mounting cylinder 22 has an engaging short cylinder 43 suspended from the inner edge of an annular top wall 42 that is brought into contact with the top surface of the base cylinder 1, and the engaging short cylinder 43 is provided around the inner periphery of the upper end of the base cylinder 1. The engagement short groove 43 is engaged with the engagement concave groove 44 and connected to the base cylinder 1. The lower end of the engagement short cylinder 43 obtains the above-described stopper of the actuator cylinder 12. A mounting cylinder portion 45 is vertically provided, and several locking projections 46 are disposed on the inner peripheral surface of the mounting cylinder portion 45. These locking projections 46 are attached to the outer periphery of the mouth-neck portion Aa of the container body A. Is formed so as to be engaged with the locking ridge Ab formed in the above. In use, the mounting cylinder 22 is attached to the mouth-neck portion Aa of the container A containing the liquid.
[0014]
In a preferred embodiment, the bellows pump has a function to prevent the contained liquid from being released from the pump when not in use or when transporting the product, that is, a shipping seal function. A preferred structure for the shipping seal function is disclosed in International Publication No. WO 95/01226, the disclosure of which is incorporated by reference. When the bellows pump is not used or the product is transported, the output opening or notch 36 for discharging the liquid is not connected to the nozzle 10. When a bellows pump is used, the notch 36 is connected to the nozzle 10, as shown in FIG. 1, by manually rotating the depression nozzle head 9.
[0015]
When the liquid is poured, the bellows 5 is compressed by depressing the press-down nozzle head 9, and the bellows 5 is extended by its own elasticity to return upward. As the bellows 5 is compressed and expanded, the suction valve 3 and the discharge valve 8 interact with each other, so that the bellows 5 sucks up the liquid in the container body A and sends it out under pressure. The liquid in the container A is discharged from the nozzle 10 of the nozzle head 9.
At the lower limit of the depression of the depression nozzle head 9, the lower end of the actuator cylinder 12 abuts against the receiving piece 30 in the base cylinder 1, and as long as the abutment is made, the amount of the liquid to be discharged is constant.
[0016]
【The invention's effect】
According to the present invention, since the configuration is as described above,
At the time of one assembly, the direction of the nozzle 10 can be made to be a fixed direction naturally, and therefore, even when the nozzle 10 is attached to the mouth-neck portion Aa of the container A, the direction of the nozzle 10 can be made to be exactly the fixed direction.
(2 ) When used in a liquid discharging container as a product containing the contents, the direction of the nozzle 10 in each product does not vary, and the bellows 5 is covered with the actuator cylinder 12 so as not to be exposed. The appearance is good and the image of the contents does not go down.
Even if the three bellows 5 have flexibility, the position and direction of the actuator cylinder 12 are regulated, so that the position and direction of the nozzle 10 are stable, and the nozzle 10 can be easily operated and used.
(4) Since the pushed-down state can be regulated by the actuator tube 12, the operation can be made constant, and by pushing down to the lower limit, a certain amount of pouring can be obtained accurately each time.
[0017]
In addition , according to the second means, the press-down nozzle head 9 is fitted to the upper end fitting portion of the bellows 5 in a certain direction, and the direction setting means 11 is provided on the lower surface of the base cylinder 1 as a certain direction regulating means 11. A concave groove 13 is provided, and a plurality of engaging protrusions 14 and a plurality of engaging recesses 15 are provided between the lower portion of the bellows fitting portion 4 and the lower edge of the lower end fitting portion 6 of the bellows 5 at unequal pitch. , And these are engaged with each other based on a fixed direction setting of the base cylinder 1 by the direction setting groove 13, so that the fixed direction restricting means 11 can be embodied with a simple configuration and accurately. Direction can be set.
[0018]
According to the third means, an engaging cylinder 16 having an engaging ridge provided on the outer edge thereof is suspended from the press-down nozzle head 9, and a locking ridge 17 is provided on the inner surface of the outer periphery of the engaging cylinder 16. The inner surface of the upper end of the laterally mounted actuator cylinder 12 is fitted and engaged, and a notch window 18 is provided at the front edge of the actuator cylinder 12, and the locking ridge 17 can be ventilated at the notch window 18. The upper part of the notch window 18 is engaged with the base of the nozzle 10 and the lower part of the notch window 18 is a vent hole inside and outside the actuator cylinder. The cylinder 12 can be firmly and stably connected in a certain direction, and a ventilation port free of water from the outside can be easily formed behind the depressing nozzle head 9. Actuators are not provided due to the ventilation holes at the bottom and the lack of locking ridges 17 at the cutout windows 18. In lifting of over motor cylinder 12, it can be and out the inside and outside air, pressurized internal air, can be prevented negative pressure, it is possible to obtain a smooth lifting does not interfere.
[0019]
According to the fourth means, the lower end of the actuator cylinder 12 is formed in the large-diameter stepped portion 19, and the large-diameter stepped portion 19 is fitted to the inner periphery of the base cylinder 1 so as to be slidable up and down. A plurality of guide flutes 20 and guide flutes 21 are formed so as to correspond to each other and are non-rotatably engaged with each other. The mounting cylinder 22 to be attached is equipped, and the stepped large-diameter portion 19 is prevented from falling off at the inner periphery of the mounting cylinder 22, so that the actuator cylinder 12 can be easily and accurately rotated with respect to the base cylinder 1 with a simple configuration. It can be mounted so that it cannot be removed and cannot be pulled out, and its appearance can be made simple and beautiful.
[0020]
According to the fifth means, an obliquely downward elastic flange 23 is integrally provided around the outer periphery of the lower end fitting portion 6 of the bellows 5, and the obliquely downward elastic flange 23 is attached to the outside of the bellows engaging portion 4 by the base cylinder 1. The lower end fitting portion 6 of the bellows 5 is strongly and air-tightly and watertightly fixed to the bellows fitting portion 4 even when the internal pressure of the bellows 5 greatly changes, because the bellows 5 is press-contacted inside the upright cylinder 24 provided upright. it can.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional side view showing an embodiment of a bellows pump with a press-down nozzle head according to the present invention .
FIG. 2 is an exploded perspective view of a main part member in the embodiment.
FIG. 3 is an inverted perspective view of a main part member in the embodiment.
FIG. 4 is a cross-sectional plan view of a main part in the embodiment.
FIG. 5 is a perspective view showing an assembled state of main parts in the embodiment.
FIG. 6 is a perspective view showing a shuttle used for assembling main members in the embodiment.
FIG. 7 is an exploded perspective view of another main member according to the embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Base cylinder 2 ... Suction pipe 3 ... Suction valve 4 ... Bellows fitting part 5 ... Bellows 6 ... Lower fitting part 7 ... Upper fitting part 8 ... Discharge valve 9 ... Depressed nozzle head 10 ... Nozzle
11… Constant direction regulating means 12… Actuator cylinder
13 ... groove for setting the direction 14 ... engaging projection
15 ... engagement recess 16 ... engagement cylinder
17 ... locking ridge 18 ... notched window
19: Large diameter part 20: Guide flute
21 ... Guide vertical ridge 22 ... Mounting tube
23… Downward elastic flange 24… Standing cylinder
25 ... bottom wall 26 ... bulging bottom
27… Mating cylinder 28… Outward flange
29: Reverse hook ridge 30: Receiving piece
31: Taper valve seat 32: Rod-shaped valve
33: Spherical valve part 34: Valve body retaining
35: Vertical fitting 36: Notch
37 ... taper valve seat 38 ... rod-shaped valve
39… Spherical valve part 40… Head
41 ... stopper tube 42 ... annular top wall
43: short engaging cylinder 44: concave engaging groove
45… Mounting tube 46… Latch
47 ... rattle stop 48 ... rattle stop A ... container body Aa ... mouth and neck
Ab ... locking ridge B ... guide rail C ... shuttle

Claims (4)

A base cylinder 1 having a suction pipe 2 suspended from a lower end is provided, a suction valve 3 communicating with the suction pipe 2 is provided in the base cylinder 1, and the suction valve 3 is enclosed in the base cylinder 1. A bellows fitting portion 4 is provided, and a bellows 5 for fitting a lower end fitting portion 6 in a gas-tight and watertight manner is provided in the bellows fitting portion 4, and a discharge valve 8 is provided in an upper fitting portion 7 of the bellows 5. At the same time, a press-down nozzle head 9 having a nozzle 10 projecting forward is fitted in a fixed direction, and a fixed direction regulating means 11 is provided between the bellows fitting portion 4 and the lower end fitting portion 6 of the bellows 5. The actuator cylinder 12 that covers the bellows 5 is suspended from the depression nozzle head 9 so that the actuator cylinder 12 is attached to the base cylinder. 1 is fitted slidably up and down and non-rotatable, As the fixed direction restricting means 11, a direction setting groove 13 is provided on the lower surface of the base cylinder 1, and a plurality of grooves are provided between the lower part of the bellows fitting part 4 and the lower edge of the lower end fitting part 6 of the bellows 5. The engaging projections 14 and the plurality of engaging recesses 15 are arranged at unequal pitches, and they are engaged with each other based on a fixed direction setting of the base cylinder 1 by the direction setting groove 13. A bellows pump with a press-down nozzle head. With respect to the actuator cylinder 12 vertically extending from the depression nozzle head 9, an engagement cylinder 16 having an engagement ridge formed around the outer edge of the depression cylinder head 9 is vertically extended from the depression nozzle head 9, and is provided on the outer periphery of the engagement cylinder 16. Engages and engages the inner surface of the upper end of the actuator cylinder 12 having a locking ridge 17 laterally provided on the inner surface thereof, and further provides a notch window 18 at the front edge of the actuator cylinder 12, and The locking ridge 17 is deficiently ventilated, the upper part of the notch window 18 is engaged with the base of the nozzle 10, and the lower part of the notch window 18 is a vent hole inside and outside the actuator cylinder. 2. The bellows pump with a down nozzle head according to 1. The lower end of the actuator cylinder 12 is formed as a stepped large diameter portion 19, and the stepped large diameter portion 19 is vertically slidably fitted to the inner periphery of the base cylinder 1 and has a mutual correspondence between them. Then, a plurality of guide vertical grooves 20 and guide vertical protrusions 21 are formed and non-rotatably engaged with each other, and a mounting cylinder 22 attached to the mouth and neck portion Aa of the container body A is mounted on the upper end of the base cylinder 1. The bellows pump with a down nozzle head according to claim 1 or 2, wherein the bellows pump has a stepped large diameter portion (19) at an inner peripheral portion of the mounting cylinder (22). An obliquely downward elastic flange 23 is integrally provided around the outer periphery of the lower end fitting portion 6 of the bellows 5, and the obliquely downward elastic flange 23 is erected outside the bellows engaging portion 4 in the base cylinder 1. 4. The bellows pump with a down nozzle head according to claim 1, wherein the bellows pump is pressed into the cylinder 24.

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