JP5229822B2 - Metering pump - Google Patents

Description

  The present invention relates to a metering pump capable of metering discharge.

Attach the pump body to the mouth and neck of the container body, connect a suction pipe that hangs into the container body to the pump body, project a nozzle from the pump body through the discharge valve, and introduce air into the container body A metering pump with holes is known as the prior art.

Japanese Patent Laid-Open No. 10-101119

However, according to the prior art, when the remaining amount of the container contents decreases, air is sucked into the pump body, so that the metered amount is not reliably discharged. In such a case, use will be stopped, but if the contents remain in the pump, the contents may leak from the pump when the container falls down, or the pump may be pushed down accidentally. When it is operated by, for example, the contents, the surroundings will be soiled with the contents. Therefore, it is necessary to discharge all the contents remaining in the pump, but when the pump is operated, the contents mixed with air are sucked into the pump, so that the pump can suck the contents. There is a problem that the discharge operation has to be repeated until it disappears.
The present invention has been made to solve the above-described problem, and an object of the present invention is to provide a metering pump capable of always performing metering discharge by preventing the liquid in the container body to which the pump is attached from decreasing. .

In order to solve the above-mentioned problems, the present invention hangs a mounting cylinder from the bottom wall of a cylinder member fitted with a piston member so as to be movable up and down, and fits the lower part of the mounting cylinder to the main container body neck. And connecting a discharge nozzle to the top of the mounting cylinder via a discharge path with a discharge valve,
Furthermore, a first suction pipe connected to a suction hole formed in the bottom wall of the cylinder member via a suction valve is suspended into the main container body,
In the metering pump provided so that the liquid in the cylinder member can be quantitatively discharged through the discharge nozzle in the compression stroke by the lowering of the piston member,
A suction hole communicating with the inside of the main container is provided in the upper portion of the mounting cylinder, and one end of the second suction pipe is connected to the suction hole, and the other end of the second suction pipe is connected to the replaceable sub container. Hanging down and holding the second suction pipe middle part to the sub-container body neck through a cylindrical plug,
The sub-container liquid is provided so as to be able to be sucked into the main container body via the second suction pipe due to the negative pressure in the main container body during the suction stroke of the piston member.

In the present invention, the cylindrical plug is detachably fitted to the inner surface of the mouth and neck of the sub-container body, and the second suction pipe is inserted into the cylindrical plug. An air introduction hole communicating with the sub container is provided.

Furthermore, the present invention provides a base tube in which the tubular stopper is fitted with a lower part to the inner surface of the mouth and neck of the sub container body,
An inner plug in which a peripheral wall is fitted to the upper outer surface of the base cylinder, and the fitting cylinder is suspended from the upper end of the peripheral wall via an inward flange,
A cap in which one end of a connecting pipe is pierced through the top wall of a cap cylinder that is detachably fitted to the outer surface of the inner plug peripheral wall, and the one end is detachably fitted into the upper part of the fitting cylinder of the inner plug. And comprising
The second suction pipe is cut at an intermediate portion so that the end of the second suction pipe portion connected to the main container body is fitted to the other end of the connection pipe and suspended into the sub container body. Fitting the end of the second suction pipe part into the lower part of the fitting cylinder,
Further, the inward flange of the inner plug is provided with an air introduction hole communicating with the sub container.

Further, according to the present invention, an engagement protrusion is formed on each of the outer surface of the inner wall of the inner plug and the inner surface of the cap cylinder, and the engagement protrusion of the cap is rotated by the rotation of the cap. The cap is provided so as to be detachable from the inner plug by climbing onto the section.

Furthermore, the present invention can change the distance between the two container bodies by bending the second suction pipe portion between the main container body and the sub container body and forming a bent portion in the pipe portion. It is provided to be able to follow.

Further, according to the present invention, a discharge port is formed in the bottom wall of the cylinder member, a nozzle fitting tube is projected from the mounting tube, and the nozzle fitting tube is communicated with the discharge port to form the discharge path. A discharge valve is provided between the nozzle fitting cylinder and the discharge port.

Since the present invention is provided so that the liquid in the sub-container can be sucked into the main container by negative pressure in the main container during the suction stroke of the piston member, the discharged liquid is always replenished, Therefore, since the liquid amount in the main container is always kept constant, it is possible to prevent the inability to dispense quantitatively due to a decrease in the remaining amount.

  In the present invention, the second suction pipe is inserted into the cylindrical plug that is detachably fitted to the inner surface of the mouth and neck of the sub container body, or the cylindrical plug is constituted by the inner plug and the cap. The cylindrical stopper can be easily detached from the sub container body, and therefore, the sub container body can be replaced quickly.

  Furthermore, in the present invention, since the second suction pipe portion between the main container body and the sub container body is formed in an inverted U shape or a circular shape, the pipe portion between both container bodies is further provided. Flexibility can be provided, so that the sub-container can be easily replaced, and the distance between the two containers can be set freely.

  Further, the present invention provides the cap so that the cap can be detached from the inner plug by the cap's engaging projection protruding onto the inner plug's engaging projection by the rotation of the cap. Can be detached from the sub-container body, which makes it easier to replace the sub-container body.

  Further, according to the present invention, since an air introduction hole communicating with the inside of the sub container is provided in the cylindrical plug, or an air introduction hole communicating with the inside of the sub container is provided in the inward flange of the inner plug, the negative pressure inside the container due to discharge The container body is not deformed due to the pressure.

It is sectional drawing of the metering pump which concerns on this invention. It is sectional drawing which shows other embodiment. FIG. 5 is a cross-sectional view showing a main part and showing a state in which a cap is detached from the inner plug.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  In FIG. 1, 1 is a main container body, and the mouth-and-neck part 2 is erected from the upper end of the trunk part through the shoulder part. Reference numeral 3 denotes a plug, which has a peripheral wall 4 penetrating the inner periphery of an outward flange engaged with the upper end of the mouth-and-neck portion 2.

  Reference numeral 10 denotes a cylinder member. A suction hole 13 with a suction valve is formed at the center of the bottom wall 12 that closes the lower surface of the peripheral wall 11, and a suction pipe fitting cylinder 14 is vertically suspended from the periphery of the suction hole 13. The first sucking pipe 14a is fitted into the raising pipe fitting cylinder, and the mounting cylinder 15 surrounding the sucking pipe fitting cylinder 14 is suspended from the cylinder member bottom wall 12 to The part is placed on the outward flange of the plug 3.

  The nozzle fitting cylinder 16 is provided so as to protrude from the front part of the upper part of the mounting cylinder 15, and the overlapping part between the front part of the cylinder member bottom wall 12 and the upper part of the nozzle fitting cylinder 16 is cut out to form the discharge port 17, The discharge port 17 and the nozzle fitting cylinder 16 form a discharge path, and a through hole is formed in the mounting cylinder 15 surrounded by the nozzle fitting cylinder 16, and the rear part of the valve body 18 is fitted into the through hole. At the same time, the skirt-like discharge valve is expanded outward from the front peripheral edge of the valve body 18, and the discharge valve peripheral edge is brought into contact with the inner peripheral surface of the nozzle fitting cylinder 16. Further, a pipe connection cylinder 19 is provided to project rearward from the rear part of the upper part of the attachment cylinder 15, and a suction hole is formed in a portion of the attachment cylinder 15 surrounded by the pipe connection cylinder 19. Reference numeral 16 a denotes a discharge nozzle fitted to the nozzle fitting cylinder 16.

  Reference numeral 20 denotes a connecting member, which is formed from a first connecting cylinder 21 that is non-rotatably fitted to the outer surface of the container body neck and neck, and a second connecting cylinder 22 that is screwed at the lower part to the upper outer surface of the first connecting cylinder. The cylinder member 10 is firmly connected to the main container body by engaging the hook portion at the upper end of the second connecting cylinder with the flange portion of the mounting cylinder 15.

  Reference numeral 30 denotes a piston member, and a base portion that erects the guide tube 33 from the lower end of the inner tube 32 that hangs down from the upper end of the outer tube 31 that is fitted to the outer surface of the upper end portion of the cylinder member 10 through the inward flange. A push-down portion 37 that hangs the fitting cylinder 36 from the center of the top wall of the peripheral wall 35 that is fitted to the outer surface of the outer cylinder 31 so as to move up and down, and a cylindrical slide that is fitted into the cylinder member so as to move up and down. Between the cylindrical piston portion in which the connecting cylinder 30 is fitted into the lower part of the fitting cylinder 36 from the center of the bottom plate 39 of the moving part 38, the upward step formed at the lower part of the inner cylinder 32, and the top wall of the peripheral wall 35 And a coil spring 33 that urges the push-down portion 37 upward. Note that the base, the push-down portion 37, the cylindrical piston portion, and the coil spring 33 can be disassembled, and thus can be easily cleaned.

Reference numeral 40 denotes a sub-container body. A mouth-and-neck part 41 is erected from the upper end of the trunk part via a shoulder part, and a cylindrical plug 42 is detachably fitted to the inner surface of the mouth-neck part. The cylindrical plug 42 has an insertion tube 44 penetrating the inner periphery of the engagement flange 43 engaged with the upper end of the mouth and neck portion 41, and the portion of the insertion tube 44 below the engagement flange 43 is connected to the inner surface of the mouth neck portion 41. The inner diameter of the insertion cylinder 44 portion that is fitted and above the engagement flange 43 is formed smaller than the inner diameter of the insertion cylinder 44 portion below the engagement flange 43 and the insertion cylinder 44 portion above the engagement flange 43. A plurality of air introduction holes 45 are formed in the inner peripheral portion so as to communicate with the sub container body 40.

46 is a second suction pipe, one end of which is fitted into the pipe connection cylinder 19 of the main container body, the other end is suspended into the sub container body 40, and the insertion tube that constitutes the cylindrical plug 42 at the middle part. 44 is inserted.

Next, the operation will be described.
In order to dispense the liquid in a fixed amount, the push-down portion 37 of the piston member 30 may be pushed down from the state shown in FIG. 1 until it abuts against the bottom wall of the cylinder member. It flows into the fitting cylinder 16, opens the discharge valve of the valve body 18, and discharges a fixed amount from the discharge nozzle.

  After the discharge, when the push-down portion 37 is raised by the biasing force of the coil spring, the liquid in the main container body 1 is sucked into the cylinder member 10 through the first suction pipe 14a and the suction valve 13. Due to this suction, the container body becomes negative pressure, so that the liquid in the sub container body 40 is sucked into the main container body 1 through the second suction pipe 46. In this way, since the same amount of liquid sucked into the cylinder member 10 by the pumping action is supplied by the liquid in the sub container body 40, the amount of liquid in the main container body 1 may be reduced. Therefore, it is possible to prevent a situation in which the quantitative discharge is impossible due to the decrease in the liquid amount.

  When the liquid in the sub container body 40 is consumed, the sub container body is replaced. That is, after removing one end of the second suction pipe 46 from the pipe connection cylinder 19, the second suction pipe 46 is taken out from the sub container body 40 by removing the cylindrical stopper 42 from the sub container body 40. Next, after removing the stopper from the new sub container body, the second suction pipe 46 is inserted into the container body to fit the cylindrical stopper 42 into the sub container body neck and the second suction pipe. One end of 46 is fitted to the pipe connection cylinder 19. At that time, the second suction pipe 46 portion between the main container body 1 and the sub-container body 40 is formed in a bent portion such as an inverted U-shape so that it can be easily bent. Since the attachment and detachment of the second suction pipe 46 and the attachment and detachment of the cylindrical stopper 42 with respect to the sub container body 40 are easy, the above operation can be easily performed.

  2 and 3 show a second embodiment. It differs from 1st Embodiment in the structure of a cylindrical stopper and a 2nd suction pipe. In the present embodiment, the cylindrical plug 50 includes a base cylinder, an inner plug, and a cap. These will be sequentially described below.

  The base tube 60 is provided with an outward flange 62 attached to an insertion tube 61 in which a lower portion is fitted to the inner surface of the mouth neck portion 41 of the sub container body 40, and the outward flange 62 is engaged with the upper end of the mouth neck portion. Yes.

The inner plug 70 hangs down the first fitting cylinder 73 from the upper end of the peripheral wall 71 fitted to the outer surface of the insertion cylinder 61 above the outward flange 62 through the inward flange 72 into the insertion cylinder 61 through a gap. At the same time, the second fitting cylinder 74 is suspended from the lower end of the peripheral wall 71 through the outward flange so as to be detachably fitted to the upper portion of the mouth and neck portion 41, and further, the sub container body 40 is attached to the inner peripheral portion of the inward flange 72. An air introduction hole 75 communicating with the inside is provided.

The cap 80 is connected to the outer surface of the peripheral wall 71 of the inner plug 70 via a concave and convex engaging means so as to be detachably fitted to the top wall 82a of the cap cylinder 82. The air introduction hole 84 is pierced so that the one end can be detachably fitted into the upper part of the first fitting cylinder 73 of the inner plug 70 and the air introduction hole 75 can communicate with the air introduction hole 75 in the inner peripheral portion of the top wall 82a. 85 is formed.

The concave-convex engagement means includes a first engagement protrusion 85 having a triangular shape on the side view formed on the outer surface of the inner peripheral wall 71 and a second engagement protrusion 86 having a triangular shape on the side view formed on the inner surface of the cap cylinder 82. (A triangular shape opposite to the first engaging protrusion 85), and the cap 80 is driven by the second engaging protrusion 86 riding on the first engaging protrusion 85 by the rotation of the cap 80. Is removable from the inner plug 70.

  The concave / convex engaging means is not limited to the above, and for example, the inner plug peripheral wall 71 and the cap cylinder 82 may be configured to be screwed together, or the inner plug peripheral wall 71 may have a protrusion on a part of the outer peripheral surface. In addition to being formed in a spiral shape, it is also possible to provide a protrusion on the inner surface of the cap cylinder 82 that is slidably engaged with the protrusion. However, in these cases, the cap 80 is provided so that it can be detached from the inner plug 70 at a rotation angle as small as possible.

In order to hold the second suction pipe 46 to the cylindrical stopper 50, the end of the second suction pipe portion connected to the pipe connection cylinder 19 of the main container body by cutting the second suction pipe at the intermediate portion. Is fitted into the other end 83a of the connecting pipe 83, and the end of the second suction pipe 46 hanging down into the sub container body 40 is fitted into the lower part of the first fitting cylinder 73. It is to be noted that the two suction pipes 46 between the main container body 1 and the sub container body 40 are bent to form a bent portion having a circular shape, a wave shape, a bellows shape, or the like in the pipe portions. It is provided so as to be able to follow changes in the spacing between bodies.

  When the liquid in the sub-container body 40 is consumed and needs to be replaced, the cap 80 is rotated and detached from the inner plug 70, and then the base tube 60 and the inner plug 70 are removed from the mouth and neck. . Next, after removing the plug from the new sub-container body, the base tube 60 and the inner plug 70 that have been removed from the old container body are fitted to the mouth and neck, and finally the cap 80 is fitted into the inner plug 70. Combine. At that time, since the circular fold-back portion 90 is provided in the second suction pipe 46 portion between the main container body 1 and the sub-container body 40, the above operation is easy.

In addition, it is preferable from the viewpoint of discharge operation that the main container body 1 and the sub-container body 40 are in an integral relationship at the time of normal discharge. Like that. Since other configurations are the same as those of the first embodiment, description thereof is omitted.

  The present invention can be used in the field of discharge containers equipped with a metering pump.

DESCRIPTION OF SYMBOLS 1 Main container body 10 Cylinder member 13 Suction hole 14a First suction pipe 15 Mounting cylinder 17 Discharge port 19 Pipe connection cylinder 30 Piston member 40 Subcontainer body 42 Cylindrical plug 45 Air introduction hole 60 Base cylinder 70 Middle plug 71 Circumferential wall 72 Inward flange 73 First fitting cylinder 75 Air introduction hole 80 Cap 82 Cap cylinder 83 Connection pipe 85 First engagement protrusion 86 Second engagement protrusion

Claims (6)

The mounting cylinder 15 is suspended from the bottom wall of the cylinder member fitted with the piston member so as to be movable up and down, the lower part of the mounting cylinder is fitted to the neck of the main container body, and the discharge valve to the upper part of the mounting cylinder. Connect the discharge nozzle through the discharge path with
Further, a first suction pipe 14a connected to a suction hole 13 formed in the cylinder member bottom wall 12 via a suction valve is suspended into the main container body 1,
In the metering pump provided so that the liquid in the cylinder member can be quantitatively discharged through the discharge nozzle in the compression stroke by the lowering of the piston member,
A suction hole communicating with the inside of the main container is provided in the upper portion of the mounting cylinder 15, and one end of the second suction pipe 46 is connected to the suction hole, and the other end of the second suction pipe is connected to a replaceable sub-container. Hanging down into the body, and holding the second suction pipe middle part to the mouth and neck of the sub container body through a cylindrical plug,
A metering pump comprising: a liquid in the sub-container that can be sucked into the main container through the second suction pipe when the negative pressure in the main container is reduced during the suction stroke of the piston member. . The cylindrical plug 42 is detachably fitted to the inner surface of the mouth and neck portion of the sub container body, and the second suction pipe 46 is inserted into the cylindrical plug, and the cylindrical plug is inserted into the sub container body. The metering pump according to claim 1, wherein an air introduction hole is provided. The cylindrical plug 50 includes a base tube 60 having a lower portion fitted to the inner surface of the mouth and neck of the sub container body;
An inner plug 70 in which the peripheral wall 71 is fitted to the upper outer surface of the base cylinder, and the first fitting cylinder 73 is suspended from the upper end of the peripheral wall via the inward flange 72;
One end of the connecting pipe 83 is made to penetrate the top wall of the cap cylinder 82 detachably fitted to the outer surface of the inner plug peripheral wall 71, and the one end is detachable into the upper part of the first fitting cylinder 73 of the inner plug. And a cap 80 fitted to
The second suction pipe 46 is cut at an intermediate portion so that the end of the second suction pipe portion connected to the main container body 1 is fitted to the other end of the connection pipe 83 and the sub container Fitting the end portion of the second suction pipe portion hanging down into the body 40 into the lower portion of the first fitting cylinder 73;
The metering pump according to claim 1, further comprising an air introduction hole communicating with the inward flange 72 of the inner plug 70 into the sub container.   Engaging protrusions 85 and 86 are formed on the outer surface of the inner plug peripheral wall 71 and the inner surface of the cap cylinder 82, respectively, and the engaging protrusion of the cap is rotated by the rotation of the cap. The metering pump according to claim 3, wherein the cap is provided so as to be removable from the inner plug by riding on. The second suction pipe portion between the main container body and the sub container body is bent, and a bent portion is formed in the pipe portion so as to be able to follow the change in the interval between the two container bodies. The metering pump according to any one of claims 1 to 4, characterized in that: A discharge port 17 is formed on the bottom wall of the cylinder member, a nozzle fitting tube 16 is projected from the mounting tube 15, and the nozzle fitting tube 16 is communicated with the discharge port 17 to form the discharge path. The metering pump according to claim 1, wherein a discharge valve is provided between the nozzle fitting cylinder and the discharge port.

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