JPS6241981A - Pump - Google Patents

Abstract

PURPOSE:To increase the types of using fluid and prevent the pollution of said fluid by the action of both members by connecting a closed space between a pump body and a polimeric film to the exterior with a flow path, and providing plural annular members and elastic members having specific forms on said film. CONSTITUTION:A vacant space 9 between a pump body 10 and a polimeric film 1 which is thermally fused to the body 10, is connected to the exterior with a flow path 6, and a valve 7 and a spring 8 are housed in this space 9. Annular members 2 (2-1-2-3) are thermally fused to the outside of the polimeric film 1, and a hole is provided on a part of the member 2 to pass through an elastic member 3. When a push rod 4 is moved up and down increasing or reducing the volume 9 to carry out a pumping action, the quantity of variation in length is absorbed by small deformations between the annular members 2, on the polimeric film 1, to prevent the elongation of the film 1, while the elastic member 3 slides in the radial direction to absorb the variation, contributing to increase and decrease in pressure of the pump. Due to such a construction of a pump, the range of the types of using fluid can be enlarged while preventing the pollution of the fluid.

Description

[Detailed description of the invention] [Industrial application field] TECHNICAL FIELD The present invention relates to a pump structure for transporting fluid.

[Conventional technology]

In the conventional diaphragm type pump structure, as shown in Fig. 3, the rubber 31 is pressed against the pump body 10 by a presser member 33 to seal it, and the volume of the space 9 is increased or decreased by moving it up and down with the action body 4 to perform the pump action. was.

[Problem that the invention seeks to solve]

However, in the above-mentioned conventional technology, the fluid that degrades rubber (
If the liquid is fully used (for example, a strong alkaline liquid), the rubber material will dissolve into the fluid and contaminate the fluid, making it unusable for inkjet devices and the like.

The present invention is intended to solve these problems, and its purpose is to increase the types of meltable fluids that can be used, and to make it possible to use inks that are most suitable for inkjet devices.

Means for Solving Problem c] The pump of the present invention has a closed space formed by the pump body and the polymer film, and at least one flow path communicating with the closed space to the outside. It is characterized in that a hole is provided in a part and at least one or more -fC annular member is joined, and at least one or more elastic members are provided passing through the hole.

[Effect]

The parts that come into contact with the fluid are the pump body and a polymer film, and the polymer film has much better chemical resistance than conventional rubber. When increasing or decreasing the volume of the closed space, the annular member completely prevents the polymer film from elongating, and the elastic member contributes to fully increasing or decreasing the pressure of the pump.

〔Example〕

FIG. 1 (aL(b) is a cross-sectional view and a plan view of an embodiment of the present invention, in which a polymer film 1 is attached to a pump body 10.
A valve 7 and a spring 8 are placed in advance in a space 9 surrounded by the polymer film 1 and the pump body 10. An annular member 2 (2-
1 to 2-3) are heat-sealed. A hole is formed in a part of the annular member 2, and the elastic member 3 passes through it as shown in FIG.

The elastic member 3 is made of spring steel in this embodiment and is rotatably attached to the pusher 4 by a wire 21.

As shown in Figure 2, the polymer film 1 is made of aluminum (22i) laminated with polyethylene film to restrict the permeation of air, etc. Various polymer films can be used such as polyester, polypropylene, nylon, etc. The annular member 2 is made of polyethylene and can be easily heat-sealed to the polymer film 1.The push rod 4 is also made of polyethylene and is heat-sealed to the polymer film 1.It can be bonded with adhesive. If the material is used, adhesive may be used.

The pump body 10 is made of polyethylene and is connected to the outside from the valve 7 through the port 5 and the outlet 6.

Now, if you try to reduce the entire volume of the space 9 by pushing the pusher 4, the internal pressure of the space 9 will increase and the partial film 1 will try to spread outward, but the annular member 2 is restrained by the elastic member 3. It doesn't swell outside. Direct pressure is applied to the polymer film IK between the annular members 2.)7'l: It tries to spread, but since the area is small, it does not apply much force, so it can withstand high pressure. When the volume of the space 9 is increased, the pressure in the space 9 is reduced and the polymer film 1 tries to stretch inward, contrary to the above, but it does not stretch because no force is applied to the small area portion. As the pusher 4 moves up and down, the length from the center to the outer periphery changes, but this change in length is caused by a small deformation between the annular members 10 on the polymer film 1.
(Fig. 4), and the elastic member 3 slides in the radial direction to absorb it.

The number of annular members 2 and elastic members 3 may be increased or decreased appropriately depending on the pressure used, the material of the polymer film 1, etc.

The hole in the annular member 2 does not need to be a complete hole, and if there is only a cutout in a part as shown in FIG. 5, assembly will be made much easier.

The reason why the polymer film 1 is laminated with aluminum foil is not only to prevent the polymer film 1 from stretching especially at high temperatures or high pressures, but also to prevent permeation with the outside.

〔Effect of the invention〕

As described above, according to the present invention, a closed space is created by the pump body and the polymer film, and there is at least one flow path communicating between the closed space and the outside, and the polymer film has one channel. By creating a pump structure in which at least one annular member having a hole in the part is joined and at least one elastic member passing through the hole, the width of the types of fluids to be used can be increased. This has the effect of increasing the size of the pump, not contaminating the fluid used, and increasing the durability of the pump itself.

[Brief explanation of the drawing]

FIGS. 1(a) and 1(b) are a sectional view and a plan view of an embodiment according to the present invention, and FIG. 2 is a partial view according to the present invention. FIG. 3 is a diagram of a conventional pump. FIGS. 4 and 5 are detailed explanatory diagrams of the present invention. 1, polymer film 2, annular member 3, elastic member 4, push rod 10, pump body 31, rubber member or more

Claims (1)

[Claims] A closed space is created by the pump body and the polymer film, and there is at least one flow path communicating between the closed space and the outside, and the polymer film has at least one annular member partially provided with a hole. A pump characterized in that it includes at least one elastic member that is connected to one another and passes through the hole.