JP3924821B2 - 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 ejection pump, a so-called depressing head type pump configured to eject liquid from a nozzle hole of a head by an action of an internal pump mechanism by depressing a depressing head at an upper end is known.
Examples of these include, for example, a cylinder in which the upper end is fixed by a mounting cap fitted to the container body neck and neck and the lower part is suspended in the container body, and an annular piston fitted in the cylinder so as to be movable up and down. It is provided with a stem that protrudes from the outer periphery of the lower end and can be moved up and down, and has a stem that protrudes upward from the cylinder and a push-down head with a nozzle that is fitted to the upper end of the stem. Discharge valves are provided in the inner upper part, and a vertically moving member consisting of a stem and a pressing head is always urged upward by a coil spring, and the vertically moving member is pushed down against the urging of this spring, thereby Pressurize the liquid and open the discharge valve to eject the liquid from the nozzle. When the head is released, the spring moves up and down the cylinder, Negative pressure and discharge valve closed and has a liquid container the body is suction valve opens and as configured introduced into the cylinder.
[0003]
[Problems to be solved by the invention]
This type of conventional pump often uses metal for some of its components. For example, a ball valve element constituting a suction valve, a discharge valve, or a coil spring that urges a vertically moving member upward is made of metal. Forming. However, in recent waste disposal circumstances, separation of metal and plastic is required, and in the conventional one, this separation is extremely difficult due to the fact that metal parts are fine and sealed inside. Met.
In view of such circumstances, the present invention eliminates the need for separation treatment by forming the whole with a synthetic resin, and can exhibit the same excellent function as a conventional product in terms of pump function, and also leaks liquid. The present invention proposes an excellent liquid jet pump that can satisfactorily prevent dents due to negative pressure of a container body to be mounted.
[0004]
[Means for Solving the Problems]
In order to solve the above problems, the pump according to the first aspect of the present invention is provided with a guide cylinder 13 penetrating through the center of the top plate portion 12 while fitting and fixing the mounting cylinder 2 to the outer periphery of the container body neck portion 9 , and A lower end is fitted and fixed to a cylindrical support case 3 having a plurality of window holes 11 formed in a peripheral wall suspended in the container body, and a support case bottom around the suction valve A provided at the center of the bottom of the support case. The lower end is connected to the upper end of the bellows tube so that the upper end of the bellows tube can be moved upward and downward, and the upper end of the bellows tube 4 is supported above the top plate portion 12 of the support case 3 via the guide tube 13. A stem 5 which is provided with a discharge valve B formed therein and a push-down head 7 with a nozzle 6 fitted and fixed to the upper end of the stem is provided, and the lower end of the outer periphery of the stem is guided while the bellows tube 4 is extended. It is constructed so that it can be slidably locked to the inner peripheral lower end of the cylinder 13 and synthesized as a whole Configured as a liquid jet pump characterized by being formed by fat.
[0005]
In the pump according to the second aspect of the invention, the upward step portion 33 provided around the lower end portion of the outer surface of the stem 5 is brought into contact with and locked to the downward step portion 34 provided around the inner surface of the guide tube 13, and the upward step portion 33 is provided. The outer surface of the locking projection 35 provided on the outer periphery of the lower part is brought into sliding contact with the inner surface of the guide tube 13 below the downward stepped portion 34, and the lower end of the outer periphery of the stem is slid to the lower end of the inner surface of the guide tube 13 when the bellows tube 4 is extended. The liquid ejection pump according to claim 1, wherein the liquid ejection pump is contacted and locked.
[0006]
According to a third aspect of the present invention, the nozzle 6 is configured such that the nozzle 6 can be rotated from the forward projecting state to the downward hanging state, and the nozzle hole and the stem 5 communicate with each other only in the forward projecting state. 2. The liquid jet pump according to claim 1, wherein the tip is locked to the upper surface of the top plate portion 12 of the support case in a suspended state so that the head cannot be pushed down.
[0007]
In the pump according to a fourth aspect of the present invention, a rotation preventing mechanism C is provided between the stem 5 and the support case 3 so that the stem can be moved up and down and cannot be rotated. The nozzle 6 is opened and closed by fitting the upper end outer periphery in a fluid-tight manner so as to be pivotable, and communicating the communication hole 46 drilled in the upper portion of the stem 5 with the nozzle base end opening by turning the head 7 with respect to the stem 5. The liquid jet pump according to claim 1 is configured as described above.
[0008]
The pump according to claim 5 is the liquid jet according to claim 1, wherein a spacer 49 is detachably provided at the lower portion of the head in a state where the outer periphery lower end of the stem 5 is slidably locked to the inner periphery lower end of the guide tube 13. Configured as a pump.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The liquid jet pump 1 of the present invention is formed entirely of synthetic resin, and includes a support case 3 with a mounting cylinder 2, a bellows tube 4, a stem 5, and a push-down head 7 with a nozzle 6 as main members. ing.
[0010]
The support case 3 has a cylindrical shape with an opening at the center of the bottom portion and the center of the top plate portion, and a mounting tube 2 projecting in a double tube shape with an open bottom surface on the upper outer periphery. By fitting, the lower end of the container is suspended and fixed in the container. In addition, a plurality of window holes 11 are formed in the peripheral wall suspended in the container body, and a guide tube 13 for penetrating the stem 5 is provided in the center of the top plate portion 12, and in the center of the bottom portion. A suction valve A is provided. Furthermore, a pipe 14 that is connected to the suction valve A and is suspended at the lower end of the container body is connected.
The embodiment shown in FIG. 1 shows an example in which the mounting cylinder 2 is rotatably provided, and the support case 3 is composed of a case body 15, a locking member 16, and a mounting cylinder member 17.
[0011]
The case body 15 has a cylindrical shape with an opening at the upper end where the peripheral wall 19 is erected from the peripheral edge of the bottom wall 18. A flange 20 protrudes outward from the outer peripheral upper part of the peripheral wall, and the peripheral wall directly below the flange is formed thick. In addition, a bulging portion 18a is formed by bulging the center portion of the bottom wall upward in a cylindrical shape, and a through hole serving as a valve hole of the suction valve is opened at the center of the top plate. Further, a fitting cylinder 21 for pipe fitting is suspended from the bottom wall rear surface, the upper end of the pipe 14 is fitted to the inner surface of the fitting cylinder, and the lower end is suspended from the lower end of the container body.
[0012]
The window hole 11 serves to reduce the weight of the support case 3 and also serves as an air intake hole for eliminating negative pressure in the container body. In this embodiment, the window hole 11 having a vertically long rectangular shape is used in the circumferential direction or the like. About six are provided at intervals. However, the number and shape of the window holes 11 are not particularly limited, but it is preferable that the lower end of the window holes 11 reaches the bottom wall 18 portion of the support case 3 in consideration of the intrusion of liquid.
[0013]
The locking member 16 has the above-described guide tube 13 penetrating from the upper end edge of the fitting tube 22 fitted to the outer periphery of the upper end of the peripheral wall of the case body 15 through the uneven engagement means so as not to come out, and A top plate portion 12a constituting the top plate portion 12 of the support case 3 is extended, and a seal cylinder 23 suspended from the peripheral edge of the back surface of the top plate portion 12a is tightly fitted to the upper end of the inner surface of the peripheral wall of the case body 15.
[0014]
The mounting cylinder member 17 has a mounting flange 24 extending inwardly from the upper end edge of the mounting cylinder 2 having a threaded inner periphery, and the inner peripheral edge of the flange is engaged with the flange 20 of the case body 15. The member 16 is loosely fitted to the fitting cylinder 22 so as to be rotatable. Then, the lower end of the case body 15 is inserted and suspended in the container body, and the peripheral portion of the flange 20 is formed by tightly fitting the above-mentioned thick portion of the peripheral wall of the case body to the upper end of the inner surface of the container body neck 9 Is pressed and locked by the flange 24 of the mounting cylinder member 17.
[0015]
The suction valve A is formed by mounting a valve member 25 that closes the through hole of the support case 3 so as to be opened and closed. As shown in FIG. 2, the valve member 25 has a plurality of elastic plate portions 27 projecting inward from the upper end of the fitting peripheral wall 26, and an outer peripheral edge is integrally connected to the inner end of each elastic plate portion 27. A plate 28 is provided, and the peripheral wall is fitted to the outer surface of the bulging portion 18a of the case body 15 and the through hole is closed by the valve plate.
The suction valve A is not limited to the above-described one. For example, the suction valve A can be configured by adopting a valve member 25a as shown in FIGS.
[0016]
This valve member 25a has a cylindrical base portion 29 having a flange projecting inward from the upper end edge and outward from the lower end edge, and is a coil standing integrally with the upper end edge of the base portion. A plurality of springs 30 are provided in the circumferential direction, and a valve plate 31 whose central portion is recessed in a spherical shape is extended at the upper end thereof. Further, the support case 3 to which the valve member 25a is mounted is fitted with a fitting cylinder part 32 standing from the peripheral edge of the through hole of the bulging part 18a, and the cylindrical base part 29 covering the bulging part 18a. The coil spring 30 is fitted to the outer periphery of the fitting cylinder part 32, and the upper end opening of the fitting cylinder part 32 is closed by the valve plate 31 and attached.
[0017]
The bellows tube 4 is erected in such a manner that the lower end thereof is liquid-tightly fitted and fixed to the bottom of the support case around the suction valve A so as to expand and contract upward. In the present embodiment, the lower connecting cylinder 4a having a large diameter at the lower end, the upper connecting cylinder 4b having a small diameter at the upper end, and a shape in which each connecting cylinder is connected by a cylindrical expansion / contraction wall 4c unevenly formed, The lower connecting cylinder 4a is sandwiched and fixed between the outer periphery of the peripheral wall of the valve member 25 and the lower end of the inner surface of the case main body peripheral wall 19, and is raised upward. Further, the length of the bellows tube 4 is slightly longer than the actual stroke so that a sliding contact locking state between a stem outer periphery and a guide tube inner periphery, which will be described later, is possible.
Above the bellows tube 4, a stem 5 and a push-down head 7 supported so as to be movable up and down are provided.
[0018]
The stem 5 communicates with the inside of the bellows tube 4 and is a conduit for introducing the liquid therein into the upper push-down head 7. The stem 5 has a cylindrical shape with its upper and lower ends opened, and its lower end is formed on the outer periphery of the upper end of the bellows tube. The upper end of the support case 3 protrudes above the top plate portion 12 of the support case 3 so as to be vertically movable.
Further, the upward stepped portion 33 formed at the lower outer surface of the stem 5 is in contact with the downward stepped portion 34 provided around the inner surface lower portion of the guide tube 13 to make it impossible to lift the stem further. 33 The locking protrusion 35 provided around the lower end of the outer periphery of the lower stem is slidably brought into contact with the lower end of the inner surface of the guide tube 13 below the downward stepped portion 34 so that the good liquid tightness of this portion is maintained. Yes. The locking ridge 35 forcibly rides on the lower end of the inner surface of the guide tube 13, and the locking ridge 35 is liquid-tightly engaged with the lower surface of the guide tube 13 during upward biasing by the bellows tube 4 during use. Stopped. Accordingly, the bellows tube 4 is in a state of being fully extended upward in the locked state of FIG. 1, and is performed in a slightly contracted state during expansion and contraction during use.
A discharge valve B is provided in the upper part of the stem 5. The discharge valve B is configured by placing a ball valve element 37 made of a synthetic resin on a valve seat 36 protruding from the upper part in the stem so that the valve port is closed and movable up and down.
[0019]
The push-down head 7 ejects the liquid introduced from the stem 5 from the nozzle 6 at the front end, and pushes it down to operate the internal pump mechanism. In this embodiment, the push-down head 7 is liquid-tightly fitted to the outer periphery of the upper end of the stem. The vertical cylinder 38 is suspended from the center of the rear surface of the top wall 39, and the hanging wall 40 is suspended from the peripheral edge of the top wall to the middle position of the vertical cylinder. It penetrates and protrudes forward. In addition, a rod-like protrusion 41 that restricts the vertical movement of the ball-shaped valve element 37 is suspended from the center of the back surface of the top wall 39.
[0020]
In this embodiment, the nozzle 6 is configured to be rotatable from the forward projecting state to the downwardly suspended state, and is configured such that the nozzle hole and the inside of the stem 5 communicate with each other only in the forwardly projecting state. Is locked to the upper surface of the top plate portion 12 of the support case 3 so that the head cannot be pushed down. In this embodiment, both sides of the base end portion of the nozzle 6 provided separately are pivotally attached to the front portion of the vertical cylinder 38 of the head 7, and the end surfaces thereof are formed as arcuate surfaces, and the transparent holes formed in the front surface of the vertical cylinder 38. The wall surface of the opening portion at the front end of the hole 42 is formed as an arc surface on which the arc surface can slide, and when the nozzle 6 is in a forward projecting state, the nozzle hole and the through hole 42 communicate with each other and the nozzle 6 is rotated downward. The circular arc surface is configured to close the through hole 42. Further, when the nozzle is hung downward, the tip of the stem 5 abuts on the top surface of the top plate 12 at a position where the upward step 33 of the stem 5 and the downward step 34 of the guide tube 13 abut. .
[0021]
When the pump 1 configured as described above is not used for storage, transportation, etc., the nozzle 6 is pivoted down so that the tip thereof is in contact with the top surface of the top plate portion 12. In use, the nozzle 6 is erected so that its base end opening communicates with the through hole 42, and then the initial operation is performed by moving the push-down head up and down several times. To prepare. Next, when the push-down head is pushed down, the bellows tube is compressed, and the pressurized liquid in the bellows tube passes through the stem 5 and opens the discharge valve B to be ejected from the nozzle 6. Next, when the pressing of the head is released, the stem 5 and the head 7 are lifted by the elastic restoring force of the bellows tube 4, and the inside of the bellows tube becomes negative pressure, so that the liquid in the container opens the suction valve A and is introduced.
At this time, outside air is introduced from the window hole 11 through the space between the guide tube 13 and the stem 5 into the container body that becomes negative pressure due to the decrease of the liquid.
[0022]
The embodiment shown in FIG. 7 shows a case where the mounting cylinder 2 is fixed so as not to rotate, and the support case 3 is composed of a case main body 15a and a mounting cylinder member 17a. The case body 15a has the same configuration as in the embodiment shown in FIG. 1 except that the flange 20 extends outward from the upper edge of the peripheral wall. The mounting cylinder member 17a extends from the upper end edge of the mounting cylinder 2 fitted to the outer periphery of the neck 9 to the inside, and a top plate portion 12b that also serves as the top plate portion 12 of the case body is extended, and a similar guide tube is formed at the center thereof. 13 is formed through. Then, the seal cylinder 43 suspended from the back surface of the top plate portion 12b of the mounting cylinder member 17a is closely fitted to the upper end of the inner surface of the case body peripheral wall 19, and the upper end of the inner surface of the mounting cylinder 2 is closely fitted to the outer peripheral edge of the flange 20 of the case body. It is fixed. Since other configurations are the same as those in the above embodiment, the same reference numerals are given and description thereof is omitted.
[0023]
Further, in the embodiment shown in FIG. 8, a detent mechanism C is provided between the lower outer periphery of the stem 5 and the inner surface of the guide tube 13. As the detent mechanism C, a concave groove 44 is provided vertically on the outer periphery of the stem 5, while a vertical protrusion 45 is provided vertically on the inner surface of the guide tube 13 of the support case 3. The stem is configured to be movable so that the stem moves up and down with respect to the support case 3 but does not rotate.
[0024]
Further, the fitting position of the upper end of the stem 5 extends to the upper part in the vertical cylinder 38 of the head 7 and is fitted in a liquid-tight and rotatable manner, and a communication hole 46 and a nozzle proximal end opening formed in the upper part thereof. The nozzles are opened and closed by communicating with each other by rotating the head 7 with respect to the stem 5.
[0025]
Further, a locking plate portion 47 is spanned between the upper outer surface of the rod-shaped protrusion 41 and the upper inner surface of the vertical cylinder 38, and the locking plate portion 47 is inserted into a notch 48 provided at the upper end of the stem 5 to The rotation is restricted. Therefore, when the locking plate 47 is in contact with one side of the notch 48, the base end opening of the nozzle 6 is in a position shifted from the communication hole 46 and is liquid-tightly closed by the upper end of the stem 5. As a result, the inside of the stem and the inside of the nozzle are blocked, and when the locking plate portion 47 is rotated to contact the other side of the notch 48, the communication hole 46 and the nozzle proximal end opening communicate with each other. Thus, the liquid can be ejected.
[0026]
In this embodiment, a spacer 49 is provided. This spacer is provided in the lower part of the push-down head 7 so as to make it impossible to push down the head. The spacer 51 is formed by projecting a handle 51 from the rear outer surface of the ring-shaped base 50 having one end opened. 50 is pushed down to fit the lower part of the vertical cylinder 38 of the head 7 and the outer surface of the upper part of the stem 5 in a snap-fit manner, and the upper surface is locked to the downward step provided on the outer surface of the vertical cylinder 38 and the lower surface is supported by the support case 3. The top plate 12 is attached to the top surface of the top plate 12 while being locked.
Since other configurations are the same as those of the embodiment shown in FIG. 1, the same reference numerals are given and description thereof is omitted.
[0027]
【The invention's effect】
As described above, the liquid ejection pump of the present invention is fitted and fixed by fitting the mounting cylinder 2 to the outer periphery of the container body neck 9 and is provided with the guide cylinder 13 penetrating the center of the top plate 12 and is suspended in the container body. A cylindrical support case 3 having a plurality of window holes 11 formed in the peripheral wall, and a lower end of the support case around the suction valve A provided at the center of the support case. A bellows tube 4 standing upright, a lower end connected to the upper end of the bellows tube to be supported in a vertically movable manner, and an upper end protruding above the top plate portion 12 of the support case 3 through the guide tube 13, and A stem 5 having a discharge valve B formed therein and a push-down head 7 with a nozzle 6 fitted and fixed to the upper end of the stem are provided, and the lower end of the outer periphery of the stem is made the lower end of the outer periphery of the guide tube 13 when the bellows tube 4 is extended. It is configured to be slidably locked, and the whole is made of synthetic resin. Because it is formed, there is no metal member like the conventional product, so there is no need for separation processing at the time of disposal, and since the bellows tube can be stored in an expanded state, the bellows tube does not sag when in use and is good The elastic expansion and contraction action can be performed, and the liquid ejection function can be exhibited well. Further, the presence of the window hole provided in the peripheral wall of the support case can reduce the weight of the support case.
[0028]
Further, an upward step portion 33 provided around the lower end portion of the outer surface of the stem 5 is brought into contact with and locked to a downward step portion 34 provided around the inner surface of the guide tube 13, and is provided on the outer periphery below the upward step portion 33. The outer surface of the locking protrusion 35 is brought into sliding contact with the inner surface of the guide tube 13 below the stepped downward portion 34, and the lower end of the outer periphery of the stem is slidably locked to the lower end of the inner surface of the guide tube 13 when the bellows tube 4 is extended. In this case, it is not necessary to pull up the extra push-down head, and the bellows tube can be reliably stretched to an appropriate length, so that a more reliable elastic expansion and contraction of the bellows tube can be performed.
[0029]
In addition, the nozzle 6 is configured to be rotatable from a forward projecting state to a downward hanging state, and is configured such that the nozzle hole and the stem 5 communicate with each other only in the forward projecting state. For those that are locked to the top surface of the top plate 12 so that the head cannot be pushed down, even if the spacer is not present, the sliding contact between the stem and the guide tube is ensured, and the head is pushed down by external force. There is no risk that the liquid will leak, and good leakage prevention can be achieved.
[0030]
In addition, a non-rotating mechanism C is provided between the stem 5 and the support case 3 so that the stem can be vertically moved and cannot be rotated, and the push-down head 7 is liquid-tight and rotated on the outer periphery of the upper end of the stem 5. The nozzle 6 is configured to be opened and closed by allowing fitting so that the communication hole 46 formed in the upper portion of the stem 5 and the nozzle base end opening communicate with each other by turning the head 7 with respect to the stem 5. In this case, the nozzle can be opened and closed by a very simple operation of rotating the head, and leakage of liquid from the nozzle hole can be prevented even if the head is pushed down by mistake.
[0031]
Further, in the case where the lower end of the stem 5 is slidably engaged with the lower end of the inner periphery of the guide tube 13 and the spacer 49 is detachably attached to the lower part of the head, the sliding contact between the stem and the guide tube is ensured. In addition, there is no fear that the head is pushed down by an external force, and good liquid leakage prevention can be achieved.
[Brief description of the drawings]
FIG. 1 is a partially cut-out half sectional view showing an embodiment of the present invention.
FIG. 2 is an exploded cutaway perspective view of the same embodiment.
FIG. 3 is an enlarged cross-sectional view of a main part of a stem sliding contact portion of the embodiment.
FIG. 4 is a plan view of the embodiment.
FIG. 5 is a half sectional view of the main part showing another suction valve of the present invention.
FIG. 6 is an exploded cutaway perspective view of the same embodiment.
FIG. 7 is a partially cut-out half sectional view showing still another embodiment of the present invention.
FIG. 8 is a partially cut-out half sectional view showing still another embodiment of the present invention.
[Explanation of symbols]
2 ... Installation cylinder, 3 ... Support case, 4 ... Bellows tube, 5 ... Stem, 6 ... Nozzle,
7 ... depressing head, 8 ... container body, 9 ... mouth neck, 12 ... top plate, 13 ... guide tube,
33 ... Upward stepped portion, 34 ... Downward stepped portion, 35 ... Locking protrusion, 46 ... Communication hole,
49 ... Spacer, A ... Suction valve, B ... Discharge valve, C ... Non-rotating mechanism

Claims (5)

The mounting cylinder 2 is fitted and fixed to the outer periphery of the container body neck 9 , and a guide cylinder 13 penetrating the center of the top plate 12 is provided, and a plurality of window holes 11 are formed in the peripheral wall suspended in the container body. A cylindrical support case 3 provided, a bellows tube 4 that is vertically fixed by fitting and fixing a lower end to the bottom of the support case around the suction valve A provided in the center of the bottom of the support case, and the above A lower end is connected to the upper end of the bellows tube so as to be movable up and down, the upper end protrudes above the top plate portion 12 of the support case 3 through the guide tube 13, and a discharge valve B is formed inside. A stem 5 and a push-down head 7 with a nozzle 6 fitted and fixed to the upper end of the stem, and configured such that the lower end of the outer periphery of the stem can be slidably locked to the lower end of the inner periphery of the guide tube 13 when the bellows tube 4 is extended. Liquid ejection port characterized by being formed entirely of synthetic resin Flop. The upward step portion 33 provided around the lower end of the outer surface of the stem 5 is brought into contact with and locked to the downward step portion 34 provided around the inner surface of the guide tube 13, and the protrusion provided on the outer periphery below the upward step portion 33 is provided. The outer surface of the ridge 35 is brought into sliding contact with the inner surface of the guide tube 13 below the downward stepped portion 34, and the lower end of the outer periphery of the stem is slidably engaged with the lower end of the inner surface of the guide tube 13 when the bellows tube 4 is extended. Liquid jet pump. The nozzle 6 is configured to be rotatable from the forward projecting state to the downwardly suspended state, and is configured such that the nozzle hole and the stem 5 communicate with each other only in the forward projecting state, and the tip is a top plate portion of the support case in the nozzle suspended state. 12. The liquid jet pump according to claim 1, wherein the liquid jet pump is configured to be locked to the upper surface so that the head cannot be pushed down. A detent mechanism C is provided between the stem 5 and the support case 3 so that the stem can be moved up and down and cannot be rotated, and the push-down head 7 is liquid-tight and rotatable on the outer periphery of the upper end of the stem 5. 2. The nozzle 6 is configured to be opened and closed by connecting the communicating hole 46 formed in the upper part of the stem 5 and the nozzle proximal end opening by communicating with the stem 5 of the head 7. Liquid jet pump. 2. A liquid jet pump according to claim 1, wherein a spacer 49 is detachably provided at a lower portion of the head in a state where the outer peripheral lower end of the stem 5 is slidably locked to the inner peripheral lower end of the guide tube.

Images