JPH1099744A - Discharging device of contents in vessel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent as much as possible a function deterioration due to a compression load of a spring part by providing a compression rate variable means compressing the spring part in a prescribed amount in the case of a discharging mode and keeping the spring part in almost noncompression state in the case of a stop mode. SOLUTION: A slide valve 82 of a mode switching valve mechanism 8 is rotated to switch to the discharging mode like figure (b) at the time of using the device. At this time, a tip of an axial part 15 gets on a compression facial seat 181 since the compression facial seat 181 of a spring seat 18 is located at the tip of the axial part 15 of a plastic valve 13, and a valve body part 11 is pressurized to a valve seat with a prescribed load by compressing quantitatively the spring part 12 of a nonreturn valve mechanism 7 to set a prescribed sealing load. Then the slide valve 82 is rotated to switch to the stop mode and the spring seat 18 is rotated simultaneously and a noncompression facial seat 182 of the spring seat 18 is located at the position of the axial part 15 of the plastic valve 13 of the nonreturn valve mechanism 7 and the spring part 12 is kept in a noncompression state to keep a free length.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid discharge device for a container having a check valve mechanism at a discharge portion, and more particularly to a container having a mode switching valve mechanism for switching between a stop mode and a discharge mode at a discharge portion. The present invention relates to a liquid discharge device.

[0002]

2. Description of the Related Art In this type of conventional liquid discharge device for a container, a main body of the container is attached to an opening of the container to suck and discharge the liquid.
A check valve mechanism that allows only the flow of the content liquid in the discharge direction and prevents backflow, and is disposed downstream of the check valve mechanism and has passed through the check valve mechanism The configuration is provided with a mode switching valve mechanism that can switch between a stop mode for preventing the content liquid from flowing out to the outside and a discharge mode for discharging the content liquid to the outside.

[0003] The check valve mechanism includes a valve seat, a valve body that can be brought into contact with and separated from the valve seat, and a spring part that presses the valve body against the valve seat at a predetermined pressure. Also, in the discharge mode, the liquid is not discharged unless a constant pressure is applied.

[0004]

However, in the case of the above-mentioned prior art, since the spring portion is always compressed to a constant load state, the spring portion material is not stored during long-term storage or long-term stock. , Etc., is promoted, the load applied between the valve body and the valve seat (seal load) is reduced, and after the content liquid is discharged, liquid dripping may occur from the discharge port. In addition, there is a possibility that the function may be deteriorated, for example, ejection leakage may occur even with a slight operation force due to an erroneous operation. This is particularly remarkable when the spring portion is made of a resin material.

An object of the present invention is to provide an apparatus for discharging the contents of a container, which can prevent the function from being deteriorated due to the compressive load of the spring portion as much as possible.

[0006]

In order to achieve the above object, according to the present invention, an apparatus main body is mounted on an opening of a container to suck and discharge a content liquid. A check valve mechanism that allows only the flow of
A mode switch disposed downstream of the check valve mechanism and capable of switching between a stop mode in which the content liquid that has passed through the check valve mechanism is prevented from flowing out and a discharge mode in which the content liquid is discharged to the outside. A valve mechanism, wherein the check valve mechanism includes a valve seat, a valve body that can be brought into and out of contact with the valve seat, and a spring part for pressing the valve body against the valve seat. In the apparatus for discharging a liquid content of a container provided, a compression amount variable means for compressing the spring portion by a predetermined amount in the discharge mode and providing the spring portion in a substantially non-compressed state in the stop mode is provided. Features.

The non-compressed state is not limited to the case where the amount of compression is completely zero, but may be slightly compressed within the range where there is no influence of creep over time.

In the container discharging apparatus of the present invention, the mode is switched to the discharging mode by the mode switching valve mechanism when used. In the case of this discharge mode, the spring portion of the check valve mechanism is compressed by a predetermined amount by the compression amount variable means, and the valve body is pressed against the valve seat by the elastic restoring force to set a predetermined seal load. Is done.

On the other hand, when the use is completed, the mode is switched to the stop mode by the mode switching valve mechanism. Then, the spring portion of the check valve mechanism is in a non-compressed state and is maintained at a free length by the compression amount variable means.

Therefore, if the mode is switched to the stop mode, the creep of the spring portion is prevented over time even during long-term storage or long-term stock, and the function of the check valve mechanism does not deteriorate. That is, at the time of switching to the discharge mode at the time of use, an appropriate sealing load between the valve body and the valve seat can be obtained. And there is no danger that discharge leakage will occur due to a slight operating force.

The compression amount changing means changes the end position of the spring portion on the side opposite to the valve body by the switching operation of the mode switching valve mechanism, and sets the end of the spring portion in the free length in the discharge mode. It is characterized by a spring seat that is closer to the valve seat by a predetermined compression allowance than the part position, and is located at the end position of the spring part in the case of the stop mode in the case of the stop mode.

That is, the compression allowance of the spring portion is changed by changing the position of the end of the spring portion of the check valve mechanism by the spring seat. With this configuration, the compression allowance of the spring portion is accurately determined.

The mode switching valve mechanism switches the mode by rotating the operating member, and the spring seat is a cam whose height protrudes toward the valve seat depending on the rotational position of the operating member. I do.

According to this configuration, the compression amount of the spring portion can be smoothly adjusted in conjunction with the mode switching operation.

The spring portion is made of resin, and is characterized by being integrally formed with the valve body portion.

In the case of the resin material, the creep with time is remarkable, but the progress of the creep can be reduced by keeping the uncompressed state during the unused stop mode.

When made of resin, not only is it cheaper than metal, but also the device body is usually a resin molded product, and the spring portion and the valve body are also made of resin. There is no need to separate and collect. However, the spring portion may be made of metal.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the illustrated embodiment.

FIGS. 1 to 5 show a container discharging apparatus according to an embodiment of the present invention.

That is, the discharge device 1 is a so-called trigger-type pump dispenser, and as shown in FIG. 4, a device body for sucking a content liquid into a mouth and neck 3 as an opening of a container 2 and discharging the liquid to the outside. 4 is attached. The apparatus main body 4 includes a discharge nozzle 6 provided with a discharge passage 5.
A check valve mechanism 7 that allows only the flow of the liquid in the discharge direction and prevents the backflow, and a mode switching valve mechanism 8 that is disposed downstream of the check valve mechanism 7. .

The apparatus main body 4 includes a retainer 42 fixed to the container mouth and neck 3 via a container cap 41, and a hollow body 43 held by the retainer 42. This body 43 has a cylinder portion 4 opened downward.
4 is fixed, and the piston member 4
5 is reciprocally inserted. A spring 46 is interposed between the piston member 45 and the upper bottom of the cylinder portion 44. The spring 46 urges the piston member 45 in a direction to protrude from the cylinder portion 44, and opens the suction valve 47 in a state where the inside of the cylinder portion 44 is set to a negative pressure and the check valve mechanism 7 is closed. The liquid is sucked into the cylinder part 44.

Then, by pulling the trigger lever 49 attached to the body 43 against the spring force of the spring 46, the piston member 45 is pushed into the cylinder portion 44 and the cylinder portion 44 is closed in a state where the suction valve 47 is closed. The interior is compressed, the check valve mechanism 7 is opened, and the content liquid sucked into the cylinder portion 44 is discharged through the discharge nozzle 6.

The check valve mechanism 7 includes a valve seat 10 and the valve seat 1.
0 and a valve body 11 that can be brought into contact with and separated from the valve seat 1.
And a spring portion 12 for pressing against zero. The valve is kept closed at a predetermined pressure or less, and opens when the pressure exceeds the predetermined pressure.

In this embodiment, the valve portion 11 and the spring portion 12 are resin molded products, and are integrally formed as a plastic valve 13 as shown in FIG. Spring part 12
Is constituted by two arcuate elastic pieces 14, 14 bulging in an arc shape, a valve body 11 is integrally formed at one end, and a shaft 15 is provided at the other end. The valve body 11 is elastically displaced in the axial direction by the bending of the arcuate elastic piece 14 in the direction orthogonal to the axial direction. A plurality of guide projections 16 protrude laterally from the shaft 15.

The shape of the spring portion 12 is not limited to the arcuate elastic piece portion 14 but also includes a plurality of elastic ring portions 17 which can be elastically deformed in the axial direction, as shown in FIG. Although not shown, a coil spring shape (not shown) may be used, and other various shapes that can be elastically deformed in the axial direction can be adopted.

The valve seat 10 is provided at the opening end of the discharge nozzle 6 extending from the cylinder portion 44 of the apparatus main body.
1 is configured to open and close the discharge passage 5 by coming and going in the axial direction.

The mode switching valve mechanism 8 includes a stop mode for stopping the content liquid passing through the check valve mechanism 7 (see FIGS. 1A and 2A), and a discharge mode for discharging the content liquid. 1 (b) and FIG. 2 (b)). In this embodiment, the valve insert 81 is inserted into and fixed to the discharge nozzle 6 of the apparatus main body 4, and rotates with respect to the valve insert 81. The slide valve 82 is freely mounted, and is configured to switch between a stop mode and a discharge mode depending on the rotational position of the slide valve 82.

That is, the valve insert 81 is provided with a plug portion 811, and the slide valve 82 is provided with a first cylindrical portion 821 provided with a hole 821 a fitted in the plug portion 811. A discharge port 95 is provided in a hole bottom wall 821 b of the first cylindrical portion 821 of the slide valve 82, and an inflow port 96 is opened at an open end of the first cylindrical portion 821. Outer periphery of plug portion 811 and hole 82 of first cylindrical portion 821
A first flow path 91 communicating with the inflow port 96 side and a second flow path 92 communicating with the discharge port 95 side are provided between the fitting surfaces with the inner periphery of 1a. 1st cylinder part 8
The first flow path 91 and the second flow path 92 are selectively communicated and blocked according to the relative rotation position of 21, so that the discharge mode and the stop mode are switched. That is, the first flow path 91
When the and the second flow path 92 communicate with each other, the discharge mode, the first flow path 91
When the second flow path 92 is shut off, the stop mode is set. In the case of the illustrated example, there are three switching positions at 120 degrees each,
One stop mode and two discharge modes are set.

Further, in the illustrated example, a chamber 94 communicating with the discharge port 95 is provided between the distal end wall of the plug portion 811 and the hole bottom wall 821a of the first cylindrical portion 821, and a radially outward portion from the chamber 94. A third flow passage 93 extending in the direction is provided, and the second flow passage 92 communicates with the discharge port 95 through the third flow passage 93 and the chamber 94. The communication between the second flow path 92 and the third flow path 93 is interrupted by the first flow path 9.
The switching is performed in synchronization with the communication and cutoff of the first and second flow paths 92.

The valve insert 81 is mounted on the body 43
Fitting 83 that is inserted and connected to the outer periphery of the discharge nozzle 6
And an insert body 84 connected to the pipe joint 83 with its central axis offset downward by a predetermined amount.
, Is provided.

The plastic valve 13 is inserted into the pipe joint portion 83, and the guide convex portion 16 slidably contacts the inner periphery of the pipe joint portion 83 to move the position of the valve body 11 to the valve seat. At the same time as positioning so as to coincide with 10, the axial movement is guided.

The insert body 84 includes an end wall portion 841 to which one end of the pipe joint portion 83 is fixed, and the above-described plug protruding from the center of the end wall portion in a cantilever state on the opposite side to the pipe joint portion. Part 811 and a plug part 811 from the outer end of the end wall part 841.
An outer cylindrical portion 842 protruding concentrically with the inner cylindrical portion 843 protruding concentrically between the outer cylindrical portion 842 and the plug portion 811.
And

On the other hand, the slide valve 82 has a hole 821a into which the plug 811 is rotatably slidably inserted.
A first cylindrical portion 821 provided with an insert main body 8 which is provided concentrically outside the first cylindrical portion 821 with a predetermined distance therebetween.
4, a second cylindrical portion 822 having an annular groove 822d rotatably slidably fitted to the outer periphery of the outer cylindrical portion 842, and a substantially triangular third cylindrical portion provided further outside the second cylindrical portion 822. 823. The second cylindrical portion 822 has an inner peripheral wall 822a and an outer peripheral wall 822b sandwiching the annular groove 824,
They are connected by an annular bottom wall 822c of the annular groove 822d. The length of the outer peripheral wall 822b is substantially equal to the length of the first cylindrical portion 821, and the length of the inner peripheral wall 822a is about half thereof. The end of the inner peripheral wall 822a and the first cylindrical portion 821
Annular first connecting wall 824 whose middle part extends in the radial direction
Are connected by Therefore, the outer periphery of the first tubular portion 821 and the inner periphery of the outer tubular portion 842 of the insert body portion 84,
Connecting wall 824 and end wall 841 of insert body 842
To form a closed annular space 85 surrounded by.

A hole 86 communicating the annular space 85 and the internal space of the pipe joint portion 83 is formed through the end wall portion 841 of the insert main body 84. The hole 86 communicates with the plastic valve 13. The shaft 15 located at the end of the spring 12 opposite to the valve body 11 is inserted, and the tip of the shaft 15 protrudes into the annular space 85. Also, this hole 8
Numeral 6 communicates with an inflow port 96 opening at the opening end of the first cylindrical portion 821.

On the other hand, in the annular space 85, a spring seat 18 is provided as a compression amount varying means projecting from the first connecting wall 824 toward the annular space 85.

By the switching operation of the mode switching valve mechanism 8, the spring seat 18 changes the tip end position of the shaft portion 15 which is the end of the spring portion 12 on the side opposite to the valve body portion 11 in the case of the discharge mode. The spring portion 12 is moved closer to the valve seat 10 by a predetermined compression allowance a than the end position in the case of the free length L0, and the spring portion 12 is moved to a predetermined size L1.
To set the seal load between the valve body 11 and the valve seat 10 to a predetermined load. In the stop mode, the seal portion is almost positioned at the end position in the case of the free length L0, and the spring portion 12 is uncompressed. The state is maintained.

That is, as shown in FIG.
Is formed into a cylindrical shape so as to surround the first cylindrical portion 821,
A compression seat surface 181 having a higher protrusion height toward the valve seat 10 along the circumferential direction and a non-compression seat surface 182 having a lower protrusion height than the compression seat surface 181 by a compression allowance a are formed. . The boundary between the compressed seat surface 181 and the non-compressed seat surface 182 is
It is 3.

Accordingly, the range in which the shaft portion 15 of the plastic valve 13 contacts the non-compression seat surface 182 of the spring seat 18 is the non-compression range x of the valve, and the range in which it contacts the compression seat surface 181 is the compression range. In the stop mode, the spring seat 18
The shaft portion 15 of the plastic valve 13 is located in the non-compression seat surface 182 of the spring valve 18. In the discharge mode, the positional relationship is set such that the tip of the shaft portion 15 of the plastic valve 13 contacts the compression seat surface 181 of the spring seat 18. ing.

In the container discharging apparatus of the present invention, when used, the slide valve 82 of the mode switching valve mechanism 8 is rotated as shown in FIGS. 1 (b) and 2 (b). Switch to ejection mode. At this time, since the compression seat 181 of the spring seat 18 is located at the tip of the shaft 15 of the plastic valve 13, the tip of the shaft 15 of the plastic valve 13 rides on the compression seat 181 and the spring 12 of the check valve mechanism 7. Is compressed by a predetermined amount, the valve body 11 is pressed against the valve seat 10 with a predetermined load, and a predetermined sealing load is set.

On the other hand, when the slide valve 8 has been used,
Rotate 2 to switch to stop mode. Then, the spring seat 18 also rotates at the same time, and the non-compressed seat surface 182 of the spring seat 18 is located at the position of the shaft 15 of the plastic valve 13 of the check valve mechanism 7.
Is located, and the spring portion 12 is kept in a free length in an uncompressed state.

Therefore, if the mode is switched to the stop mode during long-term storage or long-term market stock, the spring 1
2 is prevented, and the function of the check valve mechanism 7 is prevented from deteriorating. That is, an appropriate sealing load between the valve body 11 and the valve seat 10 can be obtained when the mode is switched to the discharge mode at the time of use, and there is a possibility that liquid dripping may occur from the discharge port 95 after discharging the content liquid. In addition, there is no possibility that a discharge leak may occur due to a slight operation force due to an erroneous operation.

In the above embodiment, the case where the present invention is applied to a trigger type pump dispenser has been described. However, the present invention can be applied to various pump dispensers having a check valve mechanism in a discharge section. In addition, although the case where the valve body and the spring are integrally formed is illustrated, a separate structure may be used. Further, the spring portion can be applied to a metal spring.

[0043]

As described above, according to the present invention,
The compression amount variable means compresses the spring portion of the check valve mechanism only in the discharge mode to set a predetermined seal load, and switches to the non-compressed state in the stop mode. By doing so, the creep of the spring portion with time can be prevented, and the function of the check valve mechanism can be prevented from deteriorating.

Also, if the position of the spring seat that supports the spring portion is changed as the compression amount variable means, the compression allowance of the spring portion can be accurately determined.

Further, if the spring seat is constituted by a cam whose height protrudes toward the valve seat, the amount of compression of the spring portion can be adjusted smoothly.

In particular, when the spring portion is made of a resin, the creep with time is remarkable. However, as in the present invention, the uncompressed state during the unused stop mode reduces the progress of the creep. Can be.

[Brief description of the drawings]

FIGS. 1A and 1B show an apparatus for discharging a content liquid of a container according to an embodiment of the present invention. FIG. 1A is a sectional view of a main part in a stop mode, and FIG. It is principal part sectional drawing.

2A is a sectional view taken along line AA of FIG. 1A, and FIG. 2B is a sectional view taken along line BB of FIG. 1B.

FIG. 3 is a perspective view conceptually showing a spring seat portion of the apparatus shown in FIG. 1;

FIG. 4 is an overall configuration diagram of a trigger-type pump dispenser to which the content liquid discharging device of FIG. 1 is applied.

5 (a) is a schematic perspective view of the plastic valve of FIG. 1, and FIG. 5 (b) is a schematic perspective view showing another embodiment of the plastic valve.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Discharge apparatus 2 Container 3 Neck and neck part (opening part) 4 Main body 6 Discharge nozzle 7 Check valve mechanism 8 Mode switching valve mechanism 81 Valve insert 811 Plug part 82 Slide valve 821 First cylinder part 821a Hole 91-93 First To third flow path 94 chamber 95 discharge port 96 inflow port 10 valve seat 11 valve body part 12 spring part 13 plastic valve 14 arcuate elastic piece part 15 shaft part 16 guide convex part 17 elastic ring part 18 spring seat 181 compression seat surface 182 Non-compressed seat surface 183 Inclined surface

Claims (4)

[Claims] 1. A non-return valve mechanism for mounting a device main body in an opening of a container to suck and discharge a content liquid, allowing only a flow of the content liquid in a discharge direction and preventing a backflow, A mode switching valve mechanism that is disposed downstream of the stop valve mechanism and that can be switched between a stop mode in which the content liquid passing through the check valve mechanism is prevented from flowing out and a discharge mode in which the content liquid is discharged to the outside. The check valve mechanism includes a valve seat, a valve body that can be brought into contact with and separated from the valve seat, and a spring part that presses the valve body against the valve seat. In the apparatus for discharging a liquid content of a container, a compression amount varying means for compressing the spring portion by a predetermined amount in the discharge mode and providing the spring portion in a substantially non-compressed state in the stop mode is provided. A liquid discharge device for the contents of the container. The compression amount varying means changes the end position of the spring portion on the side opposite to the valve body by the switching operation of the mode switching valve mechanism, and sets the end of the spring portion in the free length in the discharge mode. A spring seat is provided which is closer to the valve seat by a predetermined compression allowance than the end position, and which is located at the end position of the spring portion when the stop mode is substantially free length in the stop mode. 2. The device for discharging a content liquid of a container according to 1. 3. A mode switching valve mechanism wherein the mode is switched by rotating the operating member, and the spring seat is a cam whose height protruding toward the valve seat varies depending on the rotational position of the operating member. A device for discharging a liquid content of a container according to claim 1. 4. The apparatus according to claim 1, wherein the spring portion is made of resin and is formed integrally with the valve body portion.