JPH11128793A - Pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To minimize the clearance between a guide hole and an operation shaft and to prevent corotation of a gasket with a pump main body by the screwing torgue of a container cap. SOLUTION: In a pump, a wave form formed by a ridge line which extends radially from the central line of a pump main body 3 and has differences in height is formed on the lower surface of the flange part 15 of the pump main body 3 which is attached to the mouth-neck part of a container through a gasket 16 by a gasket or to a part of at least one of the surfaces of the gasket 16 which contact the flange part 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pump attached to an opening of a container for discharging or spraying liquid contents inside the container.

[0002]

2. Description of the Related Art As a conventional pump of this type, for example, there is one as shown in FIG.
Reference). That is, the pump 200 is a reciprocating pump, and has a cylindrical pump body 201 inserted into the container, a piston 202 reciprocally inserted into the pump body 201, and connected to the piston 202. And a stem 203. This stem 2
Numeral 03 extends vertically and linearly, and is reciprocally inserted into a guide hole 205 provided in a guide member 204 at the upper end of the pump body 201. A nozzle portion 206 for ejecting the contents is provided at the upper end of the stem 203, and a skirt portion 2 having a female screw on the inner surface is provided below the nozzle portion 206.
10 are provided.

The guide hole 20 of the guide member 204 is
The guide member 204 is provided with a stem 20 so that water does not enter the inside of the pump body 201 through a gap between the pump body 5 and the stem 203.
3 was provided with an elastic cylindrical portion 207 which was slidably and closely contacted.

[0004] In particular, the stem 203 is provided with a large-diameter portion 208 and a small-diameter portion 209, and the stem 2 is used to operate the pump.
03 is reciprocated, the elastic cylinder 207 is
In order to minimize the frictional resistance by contacting the small-diameter portion 209 of FIG. 3, the elastic cylinder 207 is brought into close contact with the large-diameter portion 208 at the most extended position of the stem 203 where no pump is used, thereby preventing water from entering. I was

[0005] The skirt portion 210 is connected to the nozzle portion 20.
When water starts to fall from above 6 by shower,
When water hits the outer periphery of the skirt portion 210, the guide member 2
In addition to preventing water from directly falling into the gap between the guide hole 205 and the stem 203 of the guide member 204, the guide member 20
4 was engaged with a female screw on the side surface to maintain a locked state during transportation and the like.

[0006] When using these pumps 200, the gasket 21 is filled after the contents liquid is filled in a container.
The pump 200 was mounted by mounting the flange portion of the pump main body 201 on the nozzle portion of the container via 2 and fixing the nozzle 206 and rotating the main body cap 211.

[0007]

However, in the above-mentioned conventional example, when the torque for rotating the main body cap 211 is excessively applied to mount the main body cap 211 on the mouth and neck of the container, the lower surface of the pump main body flange portion and the gasket are formed. Slip occurs between the pump body 201 and the upper surface, and the pump body 201 and the guide member are integrated with each other in the rotation direction by a detent.
04 turns around. However, since the nozzle 206 is fixed by the gripper, the nozzle 2 is relatively
06 is rotated in a direction opposite to the direction in which the body cap 211 rotates, so that the guide member 204 and the skirt portion 210 are rotated.
There is also a problem that the screw loosens or comes off.

The present invention has been made to solve the above-mentioned problems of the prior art, and an object of the present invention is to provide a pump capable of preventing water from entering a pump body.
Moreover, it is an object of the present invention to provide a pump capable of preventing the nozzle from being inadvertently rotated to release the locked state when the pump body is mounted.

[0009]

In order to achieve the above object, according to the present invention, there is provided a pump body having a cylindrical shape capable of temporarily storing a content liquid, and a reciprocatingly inserted pump body. Piston, a stem extending upward from the piston, an upper cap having a guide hole for closing the upper end of the pump body and through which the stem is reciprocally movable, and a nozzle connected to the upper end of the stem. A pump body provided with a flange portion mounted on the top surface of the container via a gasket when the pump body is mounted on the neck of the container using a container cap. The mechanism to prevent the pump body and gasket from rotating together by the screwing torque into the container cap when mounted on the container cap reduces the lower surface of the flange or the upper surface of the gasket. Wherein the also provided on one portion.

[0010] This co-rotation prevention mechanism is characterized in that it has a wavy shape formed by a ridge line extending radially from the center line of the pump body and having a height difference in the height direction.

The co-rotation prevention mechanism is a mechanism in which a protrusion or a recess is provided on the side of the top of the neck of the container or on the lower surface of the gasket, and the protrusion or the recess engages to prevent co-rotation. There is a feature.

Further, an inner ring is provided which comprises a horizontal portion sandwiched between the lower surface of the gasket and the top surface of the container neck, and a hanging portion hanging down from the lower surface of the horizontal portion toward the bottom of the container. Features.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1A, 1B and 2 show a pump according to a first embodiment of the present invention.

The pump 1 is used for a stationary shampoo container or the like, and has a cylindrical pump body 3 provided with a pump chamber 2 which is inserted into the container from an opening of the container and stores liquid therein. An upper cap 4 for closing the upper opening of the pump body 3, a piston 5 as a movable member which is reciprocally inserted into the pump body 3 and expands and contracts the volume of the pump chamber 2, and is provided on the upper cap 4. An operating shaft 7 reciprocally inserted into the guide hole 6 for operating the piston 5; an ejector head 9 having a discharge nozzle 8 connected to the upper end of the operating shaft 7; A discharge passage 11 that communicates between the pump chamber 2 and the discharge nozzle 8 of the ejector head 9, and a suction valve 12 that is provided in the suction passage 10.
, A discharge valve 13 provided in the discharge passage 11, and a spring member 14 that constantly urges the piston 5 in a direction to expand the volume of the pump chamber 2.

The pump body 3 is a cylindrical member whose bottom wall is provided with a suction valve 12 and whose upper end is open. A flange 15 is provided at the upper end to protrude outward in the radial direction.
This flange portion 15 is engaged with the upper end of the mouth and neck formed at the container opening via a gasket 16. At the base of the flange portion 15 of the pump body 3, the flange portion 15
A cylindrical wall 17 projecting further upward is formed.

The flange portion 15 of the pump body 3
Is fixed by a container cap 18 screwed to the neck of the container. The container cap 18 includes a cylindrical portion 18a provided with a female screw portion to be screwed into a male screw portion on the outer periphery of the container mouth and neck portion, the cylindrical portion 18a, and an inward flange extending inward from an upper end of the cylindrical portion 18a. Part 18b
The inward flange portion 18b is engaged with the upper surface of the flange portion 15 of the pump main body 3, and the container cap 18 is screwed around the outer periphery of the neck of the container mouth to thereby connect the flange portion 15 of the pump main body 3 to the container mouth. It is firmly fixed by tightening up and down between the upper end of the neck.

The piston 5 is formed integrally with the operating shaft 7, and the lower end of the operating shaft 7 projects below the piston 5.
2a can be held down.

The piston 5 is directed upward by a spring member 14 mounted in the pump chamber 2, ie,
Is always urged in the direction in which the operating shaft 7 is expanded, and in the free state, the operating shaft 7 is in the upwardly extending state from the upper surface of the upper cap 4.

The ejector head 9 has a head body 19 having a round top surface and a discharge nozzle 8 extending laterally from a side surface of the head body 19.

The head body 19 has a central boss 20 and
A skirt portion 21 extending downward from the periphery of the crown-shaped top surface at the upper end of the boss portion 20 so as to surround the boss portion 20;
It is composed of

The boss 20 has a cylindrical shape whose upper end is closed and whose lower end is open. A cylindrical joint portion 22 for connecting to the upper end of the operating shaft 7 is formed on the inner diameter end side of the lower surface of the annular boss portion 20. Have been.

In the present embodiment, a female screw is provided on the inner periphery of the lower end of the skirt portion 21 so as to be screwable with a male screw provided on the outer periphery of the upper cap 4.

The discharge nozzle 8 extends slightly inclining with respect to the horizontal direction, and its tip is bent downward. The base end of the discharge nozzle 8 penetrates the skirt 21 and is connected to the boss 20. One end of the discharge hole 81 passing through the discharge nozzle 8 also opens at the tip of the discharge nozzle 8, and the other end communicates with the space around the boss 20. The boss 2
A projection 23 projecting downward is provided at the center of the upper bottom wall 0, and the lower end of the projection 23 extends to a position facing the opening of the discharge hole.

The upper cap 4 has an ejector head 9
The skirt portion 21 has a male screw which can be screwed with a female screw provided on the inner periphery of the lower end, and a guide hole 6 is opened at the upper end, and the inner surface of the guide hole 6 comes into sliding contact with the operation shaft 7.

The suction valve 12 provided on the bottom wall of the pump body 3 has a valve seat projecting from the bottom wall into the pump chamber 2.
A valve body that comes into contact with and separates from the valve seat, a valve guide that is vertically movably inserted from the valve body into a valve hole provided in the valve seat, And a presser spring that is seated on the seat to maintain the valve closed state. The presser spring is disposed in the valve hole. When the pressure in the pump chamber 2 becomes lower than a predetermined pressure with respect to the internal pressure in the container, the suction valve 1
The second valve body rises from the valve seat against the presser spring and is opened.

On the other hand, on the lower surface of the bottom wall of the pump body 3, there is provided a connecting tube portion 24 in which the valve hole of the suction valve 12 projects cylindrically downward from the opening edge. A dip tube 25 constituting 10 is connected.

The hollow inside of the operating shaft 7 constitutes a liquid discharge passage 11, and a discharge valve 13 is provided at an upper end thereof. The discharge valve 13 includes a valve seat formed on the inner periphery of the discharge passage 11 and a ball-shaped valve provided on the upper surface of the valve seat so as to close a central valve hole. The valve seat is closed by its own weight. When the internal pressure of the pump chamber 2 becomes higher than the atmospheric pressure by a predetermined pressure or more, the valve body of the discharge valve 13 is lifted and opened. The lifted valve body contacts the projection 23 so as not to block the discharge hole of the discharge nozzle 8.

According to the present invention, the suction valve 12 is
The discharge valve 13 is configured to open when the pressure is negative and close when the pressure is positive, and to close when the pressure in the pump chamber 2 is negative and open when the pressure is positive.

As shown in FIG. 1, in the locked position, the locked state is maintained by the internal thread 21a of the lower end inner periphery of the skirt portion 21 and the external thread 41a of the threaded portion 41 of the upper cap 4 being screw-engaged. I have. The outer periphery of the cylindrical joint portion 22 at the lower end of the ejector head 9 connected to the reduced diameter portion above the operation shaft 7 enters the inner periphery of the guide hole 6. On the other hand, the lower end of the operating shaft 7 of the pump body 3 is the suction valve 1
The second valve body is in contact with the upper surface of the valve body, and the valve body is pressed against the valve seat to maintain the valve closed state.

Then, when the ejector head 9 is rotated with respect to the upper cap 4 to release the screw engagement between the female screw on the inner periphery of the lower end of the skirt portion 21 and the male screw of the upper cap 4, as shown in FIG. The operating shaft 7 protrudes upward by the urging force of the member 14, and the piston 5 moves upward, so that the volume in the pump chamber 2 expands, and the pressure in the pump chamber 2 becomes negative. The suction valve 12 is opened by this negative pressure, and a certain amount of liquid is automatically sucked into the pump chamber 2 from the inside of the container. This state is a use standby state.

When the operating shaft 7 is pushed in against the spring force of the spring member 14 from the standby state, the pump chamber 2 is compressed by the piston 5, the discharge valve 13 is opened, and the pump chamber 2 is sucked into the pump chamber 2. The discharged liquid is discharged through a discharge nozzle 8 provided in the ejector head 9.

As shown in FIG. 1 (a), the gasket 16 has a hole in the center through which the upper large-diameter portion of the pump body 3 can be inserted. The facing surfaces are radially expanded from the center line of the pump body, and have a wavy shape formed by a ridge having a height difference placed in the height direction, and at the same time, the lower surface of the flange portion 15 is also similarly wavy, It is designed to be able to strongly resist the force of rotating either one by the frictional force.

When the pump 1 is mounted on a container, the container is first filled with liquid, and then the pump 1 in a locked state is placed on the upper end of the mouth and neck of the container. Next, while holding the ejector head 9 with the gripper, the container cap 18 is rotated clockwise as viewed from above the ejector head 9 using a roll or the like, and screwed around the outer periphery of the container mouth and neck to be mounted.

At this time, if the torque for rotating the container cap 18 is excessively applied, the excessive torque normally causes the normal container cap 18 to go beyond the stop position and overrun. Further, the excessive torque is applied to the inward flange portion 18 of the container cap 18.
b, the cylindrical wall 17 and the upper cap 4 are simultaneously rotated. However, since the ejector head 9 is fixed by the gripper, the ejector head 9 does not rotate together with the upper cap 4, and as a result, the upper cap 4 and the pump body 3 relatively rotate, and the ejector head 9 The screw between the female screw on the inner periphery of the lower end of the skirt 21 and the male screw of the upper cap 4 is loosened or deviated.

However, in the embodiment of the present invention, as described above, since the lower surface of the flange portion 15 of the upper cap 4 and the upper surface of the gasket 16 opposed thereto have strong resistance, the container cap 18 is screwed. Even if the torque force is excessively applied, the male screw of the upper cap 4 and the female screw of the ejector head 9 are not loosened or disengaged.

[Second Embodiment] FIG.
In the second embodiment of the present invention shown in FIG.
The pump in which the male screw of the upper cap 4 and the female screw of the ejector head 9 of the same embodiment are engaged to prevent water from entering through the guide hole 6 is shown. The gasket 16 has a hole at the center through which the upper large-diameter portion of the pump body 3 can be inserted.
5 has a corrugated shape formed by ridges extending radially from the center line of the pump body and having a height difference in the height direction, and at the same time, the lower surface of the flange portion 15 has the same shape. The corrugated shape is such that it can strongly resist the force of rotating either one by the frictional force.

In the embodiment of the present invention, a protrusion or a recess is provided on the side of the top of the neck of the container or on the lower surface of the gasket 16, respectively, and the container cap 18 is screwed by engaging the protrusion or the recess with each other. Even when an excessive torque is applied, the upper cap 4 is prevented from rotating together with the pump body 3.

[Third Embodiment] A third embodiment of the present invention shown in FIG. 4 also has substantially the same male screw of the upper cap 4 and the ejector head 9 as those of the first and second embodiments. A pump in which female threads are engaged to prevent water from entering through the guide hole 6 is shown. Gasket 16
Has a hole at the center through which the upper large-diameter portion of the pump body 3 can be inserted, and a surface facing the lower surface of the flange portion 15 when attached to the container is radiated from the center line of the pump body radially, and has a height It has a corrugated shape formed by ridges having a height difference when placed in the
Similarly, the lower surface of 5 has a corrugated shape so that it can strongly resist a force for rotating one of the lower surfaces by a frictional force.

An inner ring 26 is provided between the lower surface of the gasket 16 and the top of the neck of the container. And this inner ring 26 is a gasket 1
6 and a horizontal portion 26a sandwiched between the lower surface of the container 6 and the top surface of the neck of the container.
And a hanging portion 26b hanging down from the lower surface of the horizontal portion 26a toward the bottom of the container. The outer diameter of the hanging portion 26b is formed to be larger than the inner diameter near the top surface of the neck of the container. Therefore, the inner ring 26 and the neck of the container are firmly engaged.

The second embodiment and the third embodiment
The pump according to the first embodiment may be used for the pump according to the first embodiment, and the first, second, and third pumps may be used.
The pump according to the embodiment can be used at the same time. In this case, the effect of preventing co-rotation is further improved than when each is used alone.

[0042]

As described above, according to the present invention,
A co-rotation prevention mechanism is provided between the gasket and the flange of the pump body, or between the gasket and the container neck.
Even if an excessive torque is applied when the container cap is mounted on the container, the pump body and the upper cap rotate together to prevent the screw engagement between the upper cap and the ejector head from being loosened or disconnected.

[Brief description of the drawings]

FIG. 1A is a half sectional view of a locked state of a pump according to a first embodiment of the present invention, and FIG. 1B is a bottom view of a gasket.

FIG. 2 is a longitudinal sectional view of the pump of FIG. 1 in a use state.

3A is a half sectional view of a locked state of a pump according to a second embodiment of the present invention, FIG. 3B is a side view of a gasket, and FIG. FIG.

FIG. 4 (a) is a half sectional view of a locked state of a pump according to a third embodiment of the present invention, FIG. 4 (b) is a side view of an inner ring, and FIG. It is a top view.

FIG. 5 is a longitudinal sectional view of a conventional pump.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pump 2 Pump room 3 Pump body 4 Upper cap 5 Piston 6 Guide hole 7 Operation shaft 8 Discharge nozzle 9 Ejector head 10 Suction passage 11 Discharge passage 12 Suction valve 13 Discharge valve 14 Spring member 15 Flange part 16 Gasket 17 Cylindrical wall 18 Container Cap 19 Head body 20 Boss part 21 Skirt part 22 Cylindrical joint part 23 Projection 24 Connection tube part 25 Dip tube 26 Inner ring

Claims (4)

[Claims] 1. A pump body having a cylindrical shape and capable of temporarily storing a content liquid, a piston inserted into the pump body to be reciprocally movable, a stem extending upward from the piston, An upper cap having a guide hole for closing the upper end and having the stem inserted therein so as to be reciprocally movable, and an ejector head having a nozzle connected to the upper end of the stem, the pump body includes In a pump provided with a flange portion mounted on the top surface of a container via a gasket when the pump body is mounted on the neck portion of the container using the container cap, a screwing torque into the container cap when the pump body is mounted on the container. The mechanism for preventing the pump body and the gasket from rotating together is provided on at least a part of the lower surface of the flange portion or the upper surface of the gasket. Pump according to claim. 2. The co-rotation prevention mechanism has a wavy shape formed by a ridge line extending radially from a center line of the pump body and having a height difference in a height direction. 2. The pump according to 1. 3. A projection or a recess is provided at an outer peripheral end of a top surface of a neck of the container, and a projection or a recess is provided on a lower surface of the gasket so as to engage with the projection or the recess of the container neck. 3. The pump according to claim 2, wherein the flange portion abuts on an upper surface of the gasket and is mounted on a top surface of the container. 4. An inner ring comprising a horizontal portion sandwiched between the lower surface of the gasket and the top surface of the container neck, and a hanging portion hanging down from the lower surface of the horizontal portion toward the bottom of the container. The pump according to claim 2 or 3, wherein: