JP3416624B2 - Pump unit and container with pump - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pump unit and a container with a pump used for a container of shampoo liquid or the like used at home, for example.

[0002]

2. Description of the Related Art Conventionally, for example, a container with a pump has been used to store shampoo liquid, soap liquid, etc. used at home. This container comprises a container body and a pump unit that is detachably inserted into the container body. Normally, in the pump unit, when the piston portion is pressed, the piston portion returns to suck up the solution from the container body, and when the piston portion is pressed again, the solution is discharged from the discharge end of the piston portion. Explaining this example with reference to FIGS. 10 and 11, the pump unit 1 is composed of a pipe-shaped pump body 2 which is detachably inserted into a container body (not shown), and an L-shaped pipe-shaped piston portion 3. .

The piston portion 3 is slidably inserted into the pump body 2, and a piston portion 3 is interposed between a suction port 4 of the pump body 2 and a piston 5 at an end portion of the piston portion 3. A solution storage unit 6 that communicates with the atmosphere is formed. Further, a check valve G1 which allows only the inflow of the solution from the container body side to the solution containing section 6 side is provided on the suction port 4 side of the solution containing section 6, and the discharge end of the piston section 3 is provided. A check valve G2 that allows only the outflow of the solution from the solution storage part 6 to the piston part 3 is provided between the discharge side of the solution storage part 6 and the piston 5 and the check valve G.
A coil spring 7 is interposed between the coil spring 7 and the coil 1. The coil spring 7 causes the piston portion 3 to move.
Is urged against the pump body 2 in a direction to increase the volume of the solution storage portion 6. In addition, as shown by arrows in FIG.
0 shows a state in which the piston portion 3 is pushed in, and FIG. 11 shows a state in which the piston portion 3 has returned.

[0004]

However, in the above-mentioned conventional pump unit, the coil spring 7 must be inserted between the piston 5 and the suction port 4, so that the assembling work is troublesome. There's a problem.
Also, from the viewpoint of protecting the natural environment, there is a demand for recycling of parts, and normally, the coil spring 7 made of metal must be disassembled and separately disposed, which is an obstacle to reuse. Further, since the coil spring 7 is used, there is a problem that the number of assembling steps and the number of parts are increased, leading to cost increase.

Further, in the container equipped with the above-mentioned pump unit, the solution in the container body normally does not come out unless the piston portion 3 is pushed, but when the container falls down, the check valve G1 and Since the check valve G2 opens, there is a problem that the solution flows out from the piston part 3. Therefore, it is an object of the present invention to provide a pump unit and a pump-equipped container that can be easily assembled, can be manufactured at low cost, can be easily reused, and can prevent the solution from flowing out even when it is collapsed.

[0006]

In order to solve the above-mentioned problems, the pump unit according to the invention described in claim 1 is
It has a bellows-shaped first bellows which can be restored in the extending direction and whose inside is a pump chamber. The suction pipe is connected to the lower part of the first bellows and the spout pipe is connected to the upper part.
A first check valve that allows only the inflow of the solution from the suction pipe to the first bellows is provided upstream of the first bellows, and only the outflow of the solution from the first bellows to the pouring pipe is provided downstream of the first bellows. And a second bellows having a bellows shape capable of returning in the extending direction.
The check valve has a valve seat provided between the first bellows and the second bellows, a base end fixed to a spout pipe downstream of the second bellows, and a tip end thereof passing through the second bellows to an upstream side. A stem that extends; and a valve element that is provided at the tip of the stem and that can be seated and separated from the valve seat from its upstream side ,
The stem is a fixing part fixed to the spout pipe and
And a pouring hole provided in the fixed part and communicating with the pouring pipe .

With such a structure, the second check valve is normally closed by seating the valve body on the valve seat by the restoring force of the second bellows. In this second check valve, the valve element is separated from the valve seat and opened by compressing the second bellows. And
If the first bellows is compressed while the second check valve is opened in a state where there is no solution in the first bellows, the air in the pump chamber becomes the second
Exhaled through the check valve. Then, when the compression of the first bellows and the second bellows is released, the second check valve closes and the inside of the first bellows returning in the extending direction becomes negative pressure. Then, the first check valve is opened, and the solution is sucked into the first bellows from the inside of the container body to fill the pump chamber. Next, when the first bellows and the second bellows are compressed again, the second check valve opens, and the solution in the pump chamber is prevented from moving into the container body by the first check valve. Is extruded through the second check valve, and the extruded solution is extruded from the spout pipe through the spout hole to the outside of the container body. Further, the second check valve can prevent the solution from flowing out when the container body falls.

A pump unit according to a second aspect of the present invention is the pump unit according to the first aspect, wherein the valve element of the second check valve is downstream of the valve seat by compressing the second bellows. From the side to the upstream side,
Before this press-fitting, it is located downstream of the valve seat. With this structure, the manufacture and assembly of the second check valve are facilitated.

[0009]

According to a third aspect of the present invention, in the pump unit according to the first or second aspect , the first check valve is a valve integrally formed with the first bellows or the suction pipe. The chamber is characterized by including a chamber, a valve body that can be inserted into the valve chamber from the outside, and a protrusion that prevents the valve body from rising. With this configuration, the valve chamber including the protrusion can be integrally formed with the first bellows or the suction pipe, and therefore, the valve body can be subsequently pushed in to manufacture.

A pump unit according to a fourth aspect of the present invention is the pump unit according to any one of the first to third aspects, wherein the first bellows, the suction pipe, the spout pipe, and the second bellows are provided. And the valve seat of the second check valve are integrally formed. With this configuration, it is possible to significantly reduce the number of parts and the number of assembling steps.

A pump unit according to a fifth aspect of the present invention is the pump unit according to any one of the first to third aspects, wherein the first bellows, the suction pipe, the spout pipe, and the second bellows. And the valve seat of the second check valve, the stem, and the valve body are integrally formed. With this configuration, it is possible to significantly reduce the number of parts and the number of assembling steps.

A pump unit according to a sixth aspect of the invention is characterized in that, in the fourth or fifth aspect of the invention, the integral molding method is a blow molding method. With this configuration, mass production of pump units is facilitated.

A pump-equipped container according to a seventh aspect of the present invention comprises the pump unit according to any one of the first to sixth aspects, and a container body to which the pump unit is attached. To do. With this configuration, it is possible to reduce the number of parts and the number of assembling steps for the entire container. In addition, the second check valve can prevent the solution from flowing out when the container falls.

The pump equipped container according to the invention described in claim 8 is the invention according to claim 7, fitted with a lower portion of the first bellows of the pump unit immovably relative to the container body, the pump unit Is equipped with an operation head having a spout that communicates with the spout pipe, and the first bellows contracts when the operation head is pushed. With this configuration, the solution in the container body can be surely sucked up and poured out by the pump unit.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a pump unit and a container with a pump according to the present invention will be described below with reference to FIGS.
Will be described with reference to the drawings. First Embodiment First, a first embodiment of a pump unit and a container with a pump according to the present invention will be described with reference to FIG.
From now on, description will be made with reference to FIG. In FIG. 1, Y indicates a container body, in which a liquid hair wash is stored. The container body Y is made of resin and has a cylindrical upper opening 10.
A male screw portion 11 is formed on the. A resin cap 13 having a female screw portion 12 screwed onto the male screw portion 11 of the upper opening portion 10 is detachably attached, and the pump unit PU is attached by the cap 13.

The pump unit PU includes a resin case 14 mounted in the upper opening 10 of the container body Y toward the inside of the container body Y, and a resin guide member 15 mounted on the upper end of the case 14. A resin bellows unit 16 inserted into the container body Y, and a resin operation head S mounted on the bellows unit 16 are provided. The case 14 is a tubular member having a flange portion 17 that is locked around the upper opening 10 of the container body Y,
An opening 18 is provided at the bottom. And this case 1
An engaging portion 19 is formed on the inner peripheral surface of the upper portion of 4, and the guide member 15 is fitted therein.

The guide member 15 has an engaging portion 20 which fits into the engaging portion 19 of the case 14, and a holding portion for slidably inserting the discharge pipe 21 of the operation head S inside the engaging portion 20. The unit 22 is provided. The engaging portion 20 and the holding portion 22 are integrated in the upper portion and are urged in directions away from each other. In addition, the guide member 15 includes the holding portion 22 and the engaging portion 2.
0 has an annular flange portion 23 which extends outward in the radial direction and can be locked to the upper surface of the cap 13, and the flange portion 23 prevents the cap 13 from moving in the pulling direction. ing.

As shown in FIG. 2, the bellows unit 16 is inserted into the container body Y, sucks up the solution inside, and pours it out of the container body Y. The bellows unit 16 includes a suction end 3 at the lower end which is inserted into the container body Y.
A suction pipe 27 in which 2 is obliquely cut is provided, and a bellows-shaped first bellows 28 is connected to the suction pipe 27 so as to communicate with the upper portion of the suction pipe 27.
The first bellows 28 is capable of returning in the extending direction, that is, the direction in which the internal volume increases, has a predetermined spring constant, and has a pump chamber 31 inside.

A first non-return valve which permits only the inflow of the solution from the container body Y into the first bellows 28 upstream of the first bellows 28, that is, between the suction pipe 27 and the first bellows 28. A valve G1 is provided. The first
The check valve G1 includes a valve chamber 30 integrally formed with the suction pipe 27 and the first bellows 28, and a valve body 33 that can be inserted from a suction end 32 of the suction pipe 27 is inserted into the valve chamber 30. There is. Here, the valve element 33 is a spherical member made of resin, but may have a bowl shape, a hemispherical shape, or the like as long as the opening 37 can be closed, and the shape thereof is not limited.

Here, as shown in FIG. 4, the first check valve G
The ridge 3 is provided between the suction pipe 27 of No. 1 and the opening 37.
4 is formed so that the valve body 33 inserted from the suction end 32 of the suction pipe 27 cannot be pushed in unless it is pressed in with a certain force, and the valve body 33 is prevented from coming off.

Then, as shown in FIG. 2, the first check valve G
1, a protrusion 35 for preventing the valve body 33 from rising is formed in the valve chamber 30 at the downstream side. This projection 35 is also formed at the same time when the valve chamber 30 is formed. If the valve body 33 can be prevented from rising, the cross section of the valve chamber 30 itself can be changed to the valve body 33 instead of the protrusion 35.
Shapes that do not rise, such as ellipses, squares,
It is also possible to have a modified cross section such as a triangle.

Here, the first check valve G1 and the first bellows 2
8 The opening 18 of the case 14 at the boundary with the lower part
A constricted portion 36 that locks (shown in FIG. 1) is formed, and when the first bellows 28, that is, the bellows unit 16 is locked to the case 14 and the first bellows 28 is compressed, It can be supported from below.

A second bellows 40, which is capable of returning in the extending direction, is communicatively connected to the upper portion of the first bellows 28, and the discharge pipe 2 of the operation head S is attached to the upper portion of the second bellows 40.
The spout pipe 41 to which 1 is connected is communicatively connected.
Further, a constricted portion 42 is formed between the first bellows 28 and the second bellows 40, and a discharge pipe from the inside of the first bellows 28 (that is, the pump chamber 31) is provided here, that is, downstream of the first bellows 28. A second check valve G2 that allows only the outflow of the solution to the 41 side is provided.

The second check valve G2 includes a valve seat 43 formed by the inner peripheral surface of the constricted portion 42 on the first bellows 28 side,
A valve element 44 that can be seated on and away from the valve seat 43 from the first bellows 28 side, and a base end of the valve element 4 is fixed to the spout pipe 41.
4 and a stem 45 that supports 4. As shown in FIG. 5, at the base end of the stem 45, a flange portion (fixed portion) 46 mounted on the upper end of the spout pipe 41 and having the same outer diameter as the spout pipe 41, and inserted into the spout pipe 41. The large diameter portion (fixed portion) 47 is provided, and the small diameter shaft portion 48 extends downward from the center of the large diameter portion 47. The stem 45 is liquid-tightly fixed to the spout pipe 41 by fitting the large diameter portion 47 into the spout pipe 41 and bringing the flange portion 46 into close contact with the upper end of the spout pipe 41. In addition,
The securing means of the stem 45 is not limited to the fitting as long as the liquid-tight state between the spout pipe 41 and the stem 45 can be secured, and the flange portion is simply placed on the upper end of the spout pipe 41. However, it is also possible to adopt an adhesion or welding means. Further, a plurality of spout holes 49 penetrating from the flange portion 46 to the large diameter portion 47 are provided at the base end of the stem 45, and the spout holes 49 are solution passages. The number of the pouring holes 49 is not particularly limited,
It can be appropriately set based on the viscosity of the solution to be poured.

The small-diameter shaft portion 48 is connected to the spout pipe 41.
The second bellows 40 is passed through and the tip thereof is located near the constricted portion 42. And this small diameter shaft portion 4
The valve element 44 provided at the tip of 8 projects toward the first bellows 28 side from the constricted portion 42. The valve element 44 has an abacus bead shape, and a bulging portion 44a formed substantially in the center is set to have an outer diameter larger than the inner diameter of the constricted portion 42.
The bellows 28 is seated on and away from the valve seat 43. It should be noted that the valve element 44 may have a bowl shape, a hemispherical shape, or the like as long as it can be seated on the valve seat 43 and can be closed, and the shape thereof is not limited.

The second bellows 40 is compressed in the mounted state shown in FIG. 1 and FIG.
The valve body 44 is urged in a direction to be seated on the valve seat 43 by a restoring force of 0 in the extending direction. The second bellows 40 is dimensioned so as to be slightly compressible when the valve element 44 is seated on the valve seat 43, and when the stem 45 is pushed downward when the valve element 44 is seated, the second bellows 40 is pressed. 40 is slightly compressed so that the valve element 44 moves the valve seat 43.
And the second check valve G2 is opened.

The method of assembling the second check valve G2 will now be described. Before assembly, the second bellows 40 of the bellows unit 16 is kept in an expanded state as shown in FIG. Then, the valve element 44 and the small diameter shaft portion 48 are inserted into the spout pipe 41, the large diameter portion 47 is fitted into the spout pipe 41, and the flange portion 46 is placed on the upper end of the spout pipe 41. In this state, the valve element 44 has the constricted portion 4
It is located above 2 (that is, on the downstream side of the valve seat 43 in the flow direction of the solution). Next, the flange portion 46 is pushed down and the second bellows 40 is compressed, so that the valve element 44 is press-fitted further into the inner portion than the constricted portion 42, and the first
Push it into the bellows 28 side. When the pushing of the flange portion 46 is released after the valve body 44 has passed through the constricted portion 42,
The return force in the extending direction of the second bellows 40 pushes up the spout pipe 41, and the stem 45 is pushed up accordingly. As a result, the valve element 44 is seated on the valve seat 43. In this way, the second check valve G2 is assembled and brought into the state shown in FIG.

A flat portion 50 is formed on the upper end of the second bellows 40, and the flat portion 50 is engaged with the lower end of the holding portion 22 of the guide member 15 and is displaced in the extending direction. It also functions as a stopper that prevents the upward movement of the second bellows 40.

Here, the suction pipe 27, the valve chamber 30 of the first check valve G1, the first bellows 28, the constricted portion 42, the second bellows 40, and the spout pipe 41 are made of resin material such as PP or PET blown. It is integrally molded by molding, and the valve body 33 of the first check valve G1 and the second check valve G1 are
The bellows unit 16 is assembled by mounting the stem 45 and the valve element 44 of the check valve G2. In addition, in this embodiment, the valve body 33 of the first check valve G1 and the second check valve G1.
The second stem 45 and the valve element 44 are formed as separate members, but it is preferable that these parts are made of the same resin material as the first bellows 28 or the like. By doing so, when recycling as a material, there is no need to disassemble and separate each type of resin, and it becomes easier to handle.

Further, as shown in FIG. 6, the second check valve G2
It is also possible to integrally form the stem 45 and the valve element 44 of the pouring pipe 41. By doing so, the number of parts can be reduced, the number of assembling steps can be reduced, and the cost can be reduced. Note that FIG. 6 shows a state before the second check valve G2 is assembled, and the same mode parts as those of the second check valve G2 described above are denoted by the same reference numerals. Even when the valve body 44 and the stem 45 are integrally formed with the spout pipe 41 as described above, the second bellows 40 is compressed and the valve body 44 is constricted.
The second check valve G2 can be assembled by press-fitting it below.

Then, the insertion portion of the discharge pipe 21 of the L-shaped operation head S slidable with respect to the guide member 15 is inserted into the pouring pipe 41 on the upper portion of the bellows unit 16 configured as shown in FIG. 38 is pressed in from the outside,
The operation head S is attached to the bellows unit 16 and the pump unit PU is assembled. Here, in the bent portion of the discharge pipe 21, the above-mentioned cap-shaped pressing portion 2 is provided.
5, the horizontally extending terminal 51 of the discharge pipe 21 that bends at the pressing portion 25 bends slightly obliquely downward,
It opens at the outlet 52.

By pressing the pressing portion 25 of the operation head S composed of the pressing portion 25 and the discharge pipe 21, the second check valve G2 is opened, and the lower portion is attached to the container body Y via the case 14. The first bellows 28, which is attached so as to be unable to move up and down, is compressed to suck out the solution in the container body Y.

In the container of this embodiment, as shown in FIG. 1, when there is no solution in the first bellows 28 and the pressing portion 25 of the operation head S is pushed downward, as shown in FIG. Then, the valve element 44 of the second check valve G2 opens apart from the valve seat 43. On the other hand, since the valve element 33 of the first check valve G1 closes the opening 37, when the pressing portion 25 is subsequently pushed down, the air inside the first bellows 28 is compressed as the first bellows 28 is compressed. Is extruded from the second check valve G2 through the second bellows 40 into the spout pipe 41, and further extracted through the spout hole 49 and the discharge pipe 21 of the operation head S through the spout 52.

When the pressing portion 25 of the operation head S is released, the first bellows 28 and the second bellows 40 try to return in the extending direction, so that the valve body 4 of the second check valve G2 is opened.
4 is seated on the valve seat 43 and closed, and the inside of the first bellows 28 becomes negative pressure. Then, as the operation head S returns,
The valve body 33 of the first check valve G1 floats upward to open the opening 37, sucks the solution from the container body Y into the first bellows 28, and as shown in FIG. The solution is filled inside.

Next, when the pushing portion 25 of the operating head S is pushed again as shown in FIG. 7, the second check valve G2 opens to allow the outflow from the pump chamber 31 to the pouring pipe 41, and Since the valve body 33 of the first check valve G1 closes the opening 37 to prevent the valve body 33 from returning to the container body Y side, the pump chamber 31
As the first bellows 28 is compressed, the solution therein is pushed out to the spout pipe 41 through the second check valve G2 and the second bellows 40, and further through the spout 49 of the stem 45. It is poured out from the pouring outlet 52 through the discharge pipe 21 of the operation head S.

Therefore, the expansion and contraction of the first bellows 28, which itself functions as the pump chamber 31, causes the container body Y to be expanded.
Since the solution inside can be sucked out, there is no need for a member for storing the solution (that is, a member forming the pump chamber) as in the case of using a conventional coil spring, and the number of parts and the number of assembly steps can be reduced. be able to.
Also, since each member can be molded with resin,
It is easier to disassemble and reuse than when using steel coil springs, valves and check valves.

Even if the first check valve G1 is opened when the container to which the pump unit PU is attached falls, the second check valve G1 is opened.
Since the check valve G2 maintains the closed state, it is possible to prevent the solution from flowing out. In addition, when the solution in the first bellows 28 is about to be pushed out due to the rise in the pressure in the first bellows 28 when the container does not fall, the second check valve G2 does not operate. Therefore, it is possible to prevent the liquid from dripping from the spout 52 even when the container is not falling.

Therefore, the solution does not drip at the spout 52 at the end 51 of the discharge pipe 21, and the container and the surroundings of the container can be always kept clean, and the solution drip at the spout 52 results. Then, it is possible to prevent the solution attached around the spout 52 from solidifying and reducing the opening area of the spout 52 or blocking it, which is advantageous in that it is easy to use.

Further, the second check valve G2 is the second bellows 40.
The valve closed state is maintained by the restoring force in the extension direction of the second head unless the pressing portion 25 of the operation head S is pushed down.
Since the check valve G2 does not open, the second check valve G2 does not open due to vibration applied to the container at the time of falling or the like, so that careless leakage of the solution can be reliably prevented.

The suction pipe 27, the valve chamber 30 of the first check valve G1, the first bellows 28, the constricted portion 42, the second bellows 40, and the spout pipe 41 can be integrally molded by blow molding. It is possible to significantly reduce the cost, and since the valve body 33 of the first check valve G1, the valve body 44 of the second check valve G2, and the stem 45 are molded of resin, the container body Y and other parts are formed. At the same time, it becomes easy to reuse, and in particular, when they are formed of the same material, it is not necessary to separate and process each material, so that it is possible to easily deal with environmental problems.

Second Embodiment Next, a second embodiment of the pump unit and the pump-equipped container according to the present invention will be described with reference to FIG. The pump unit and the pump-equipped container of the second embodiment differ from those of the first embodiment described above in the following points. First
In the second embodiment, the suction pipe 27 and the valve chamber 30 of the first check valve G1 are integrally formed with the first bellows 28 as a part of the bellows unit 16. However, in the second embodiment, the suction pipe is 27 and the valve chamber 30 of the first check valve G1 are formed integrally with the case 14 and are separate from the bellows unit 16.

More specifically, in the bellows unit 16,
A short tubular portion 53 is integrally provided at the lower portion of the first bellows 28. On the other hand, in the case 14, the valve chamber 30 of the first check valve G1 is integrally formed in the lower portion of the opening 18, and the suction pipe 27 is integrally connected to the lower portion of the valve chamber 30. . And
By fitting the tubular portion 53 of the first bellows 28 into the valve chamber 30 provided in the case 14, the first bellows 28 and the valve chamber 30 are connected for communication. Since other configurations are the same as those of the first embodiment, the same reference numerals are given to the same aspect parts and the description thereof will be omitted.

In the pump unit thus constructed, the first check valve G1 is inserted into the valve chamber 30 through the upper opening of the case 14 before inserting the bellows unit 16 into the case 14.
Since the valve body 33 can be inserted, the first check valve G
1. Assembling of 1 becomes easy. Therefore, in this case, it is not necessary to provide the ridge 34 on the upper end of the inner surface of the suction pipe 27 as in the first embodiment.

[0045]

As described above, according to the invention described in claim 1, since the solution in the container body can be sucked out by the expansion and contraction of the first bellows, which itself functions as a pump chamber, the spring is used. There is no need for a member to contain the solution as in the case of use, the number of parts,
This has the effect of reducing the number of assembly steps.

Further, since each member can be molded from resin, there is an effect that disassembly and reuse can be performed more easily than in the case where a steel coil spring or a check valve is used. Furthermore, even if the first check valve opens when the container to which this pump unit is attached falls,
The check valve is effective in preventing the solution from flowing out.

According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, the manufacturing and assembling of the second check valve can be facilitated and the cost can be reduced. There is.

According to the invention described in claim 3 , in addition to the effect of the invention described in claim 1 or 2 , the valve chamber can be integrally formed with the first bellows or the suction pipe, including the protrusion, and thereafter. Since it can be manufactured by pushing in the valve body, there is an effect that a significant cost reduction can be achieved.

According to the invention described in claim 4 or 5 , in addition to the effect of the invention described in any one of claims 1 to 3 , it is possible to significantly reduce the number of parts and the number of assembling steps. As a result, it is possible to reduce the cost. Further, if these parts are molded from the resin of the same material, there is no need to disassemble and separate each material, and there is an effect that it can be easily reused.

According to the invention described in claim 6 , there is an effect that the mass production of the pump unit is facilitated and the cost can be largely reduced. According to the invention described in claim 7 , it is possible to reduce the number of parts and the number of assembling steps for the entire container. Further, even if the first check valve is opened when the container falls, the second check valve can prevent the solution from flowing out.

According to the invention described in claim 8 ,
In addition to the effect of the invention described in 7 , the solution in the container body can be surely sucked up by the pump unit and poured out.

[0052]

[Brief description of drawings]

FIG. 1 is an overall cross-sectional view of a container equipped with a pump unit according to a first embodiment of the present invention.

FIG. 2 is an overall cross-sectional view showing a state after the second check valve of the bellows unit in the first embodiment is assembled.

FIG. 3 is an overall sectional view showing a state before assembling a second check valve of the bellows unit.

FIG. 4 is an enlarged cross-sectional view of a valve chamber of a first check valve in the bellows unit.

FIG. 5 is an enlarged cross-sectional view of a valve body and a stem of a second check valve of the bellows unit according to the first embodiment.

FIG. 6 is an enlarged cross-sectional view showing another embodiment of the second check valve.

FIG. 7 is an enlarged cross-sectional view of a main part of the container equipped with the pump unit according to the first embodiment when the operating head is lowered.

FIG. 8 is an enlarged cross-sectional view of a main part of the container equipped with the pump unit according to the first embodiment when the operation head is elevated.

FIG. 9 is an overall sectional view of a container equipped with a pump unit according to a second embodiment of the present invention.

FIG. 10 is a cross-sectional view showing an operating state of the conventional technique.

FIG. 11 is a cross-sectional view showing an operating state of the conventional technique.

[Explanation of symbols]

27 Suction pipe 28 First Bellows 30 valve chamber 31 pump room 33 valve body 35 Protrusion 40 Second Bellows 41 Pour pipe 43 valve seat 44 valve body 45 stem 46 Flange part (fixed part) 47 Large diameter part (fixed part) 49 pouring hole G1 1st check valve G2 Second check valve PU pump unit S operation head Y container body

─────────────────────────────────────────────────── --- Continuation of the front page (56) References JP-A-10-211947 (JP, A) JP-A-9-169353 (JP, A) JP-A-56-104184 (JP, A) JP-A-63- 91161 (JP, A) JP 48-50881 (JP, A) JP 60-185516 (JP, A) Actually opened 53-57308 (JP, U) Actually opened 53-131942 (JP, U) (58) Fields surveyed (Int.Cl. ⁷ , DB name) B05B 11/00 B65D 47/34 F04B 9/00-15/08 F04B 43/00-47/14 F04B 53/00-53/22 F16K 15 / 00-15/20

Claims (8)

(57) [Claims] 1. A bellows-shaped first bellows, which can return in the extending direction and whose inside is a pump chamber, has a suction pipe connected to the lower part of the first bellows and a spout pipe connected to the upper part thereof. A first check valve is provided upstream of the first bellows that allows only the solution to flow from the suction pipe to the first bellows, and the solution flows out of the first bellows to the pouring pipe downstream of the first bellows. A second check valve that allows only the above and a bellows-shaped second bellows that can return in the extending direction are provided, and the second check valve is a valve seat provided between the first bellows and the second bellows. And a stem whose base end is fixed to a pouring pipe downstream of the second bellows and whose tip extends upstream through the second bellows; and an upstream side of the stem which is provided at the tip of this stem. and a valve body which can be seated away from the scan System is fixed to the spout pipe
And a fixed part that is provided on this fixed part and communicates with the pouring pipe.
Pump unit, characterized in Rukoto a note Deana. 2. The valve body of the second check valve is press-fitted from the downstream side to the upstream side of the valve seat by compressing the second bellows, and before the press-fitting, the valve seat of the valve seat is closed. The pump unit according to claim 1, wherein the pump unit is located on the downstream side. 3. The first check valve is provided with the first bellows.
Or the valve chamber integrally formed with the suction pipe and this valve chamber
The valve body that can be inserted from the outside and the lift of this valve body
And a protrusion for preventing the protrusion.
Alternatively, the pump unit according to claim 2. 4. The first bellows and the suction pipe.
And the spout pipe, the second bellows, and the second check valve
2. The valve seat according to claim 1 is integrally molded.
4. The pump unit according to claim 3. 5. The first bellows, the suction pipe, the spout pipe, the second bellows, the valve seat of the second check valve , the stem, and the valve body are integrally formed. The pump unit according to any one of claims 1 to 3 . 6. The integral molding method is a blow molding method.
Pump unit according to claim 4 or claim 5, characterized in that it. 7. The method according to any one of claims 1 to 6.
I installed this pump unit with this pump unit
A container with a pump, characterized by comprising:
vessel. 8. Below the first bellows of the pump unit.
Part is attached immovably to the container body, and
The pump unit has a spout that communicates with the spout pipe.
Equipped with an operating head for
The first bellows contracts according to claim 1.
The container with a pump according to 7 .