JP3265537B2 - Liquid holding container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid holding container for storing a liquid or supplying a liquid from the container. The present invention proposes a container suitable for holding, holding, and even more uniformly feeding.

[0002]

2. Description of the Related Art For example, in a fuel container in which the container is fixed to a vehicle or the like, there is a problem caused by a dynamic use state. Of particular importance is the problem of the liquid in the container moving to one end in the container cavity under dynamic use conditions. this is,
This is because the center of gravity of the liquid in the dynamic use state moves within the container cavity.For this reason, when the liquid in the fuel container cavity is supplied to an engine or the like, the supply amount varies depending on the amount of liquid in the cavity, and the amount of the liquid varies. Supply cannot be expected. As a measure to solve these problems, a method of solving the problem by filling the cavity with urethane foam in order to prevent the liquid from moving in the cavity of the container is disclosed in, for example, Japanese Patent Publication No. 42-21.
No. 03 publication and the like.

[0003] To summarize this technology, urethane foam is filled in a cavity of a container to store a liquid. Even if the container is in a dynamic use state, a large amount of liquid moves in the cavity. It can be expected that the liquid in the cavity of the container can be supplied to an engine or the like more uniformly than before.

[0004]

However, this technique also has the following problems. That is, the container is simply filled with a single-layer urethane foam of a volume corresponding to the cavity of the container, and the foam is filled without considering the properties of the stored liquid. Depending on the case, the effect may not be fully exhibited.
In particular, in these containers, when the liquid in the cavity is supplied to the outside, it is not allowed to cause the supply to be uneven, and there is no one that sufficiently considers this point.

[0005] In view of these points, the present applicant considers Japanese Utility Model Application No.
No. 56310 proposes to press-fill urethane foam into the cavity of the container. Although the above problem has been solved by this, the problem remains that the manufacturing process becomes complicated because the foam must be permanently deformed by mechanical compression or thermal compression.

The present invention relates to a container for holding paint, ink and the like which is stored in a cavity of a container and sequentially supplies the paint or ink from the container, and in particular, a cavity corresponding to a discharge port of the container in order to always supply a constant amount from the container. And the other cavity space is filled with a foam having an optimum cell diameter to hold the liquid by capillary action,
A liquid container with a constant supply has been developed.

[0007]

According to the present invention, in a liquid holding container having a liquid discharge port and a vent, at least 50 to 200 cells are provided in a cavity corresponding to at least the liquid discharge port.
A synthetic resin communicating foam having a thickness of 1 mm or more per 25 mm is attached. Further, in the remaining space of the cavity, the number of cells whose mesh is coarser than that of the synthetic resin communicating foam is 5 to 10
It is characterized by being filled with 0/25 mm synthetic resin communicating foam, the liquid in the container is stably held by the capillary action by the foam, and a constant amount of discharge / supply is possible. Things. The synthetic resin communication foam used is preferably urethane foam or melamine foam.

[0008] The urethane foam used as a synthetic resin communicating foam to be used corresponding to the liquid discharge port or filled in the entire cavity is generally a so-called soft urethane foam, which is mounted in the cavity. In the state, the former has a cell number of 50 to 200 cells / 25 mm, and it is necessary that the thickness is at least 1 mm or more.
Pieces / 25 mm. As for these urethane foams, those having an original number of cells in each range, for example, those having a cell number of 50 to 200/25 mm in the former may be used as they are, or urethane foams having a small number of cells may be used. The form may be compressed and used within the range of the number of cells. This is to promote the capillary phenomenon for always supplying a constant amount from the extremely fine discharge port when the stored liquid is supplied to the outside, and of course, depending on the stored liquid, With regard to the foam applied to the liquid discharge port, if the number of cells is 50 cells / 25 mm or less, there is a possibility that the capillary phenomenon is interrupted, while the number of cells is 200 cells / 25 m.
If it is more than m, the clogging phenomenon may occur.

The urethane foam may have a cell membrane attached at the time of foaming, but it is particularly preferably a so-called open cell having the cell membrane removed. The method of forming an open cell form (three-dimensional reticulated form) from which the cell film has been removed is performed, for example, by immersing the film in an alkaline aqueous solution or by an explosion method.

Further, when the urethane foam is mounted, it is filled in the cavity of the container as it is or by being compressed, and the compression is also performed by mechanically compressing the container. It may be permanently deformed by compression.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to a container for holding paint, ink, etc., and more particularly, to a container suitable for supplying these liquids to the outside more uniformly from inside the container. 200 cells / 25 mm, a synthetic resin communicating foam having a thickness of 1 mm or more with respect to the discharge direction is attached, and the remaining cavity space is made of a synthetic resin having a cell number of 5 to 100 cells / 25 mm with a coarser mesh than this. The biggest feature is that it is filled with open-cell foam.
The liquid filled in the container is stable against the oscillation of the container, and even when discharging and supplying, always provides a constant liquid supply by the capillary phenomenon. Thus, the amount of the foamed member that requires a post-process such as permanent deformation due to heat or thermal compression can be minimized.

[0012]

The present invention will be described in detail with reference to Examples.
There is no restriction at all by these examples. FIG. 1 is a perspective view showing an ink liquid holding container main body which is an example of the container of the present invention, and FIG. 2 is a partially cutaway perspective view thereof. FIG. 3 is a sectional view of a main part. In the figure, 1
Denotes a container body, and 2 denotes an air vent provided at an upper end portion of the container body 1, which makes the inside of the cavity 3 of the container atmospheric pressure. Reference numeral 4 denotes an ink ejection port provided at the lower end of the container body 1 at a diagonal position of the ventilation port 2.

A urethane foam 5 having a cell number of 80 cells / 25 mm and a thickness of 2 mm is adhered in the cavity 3 of the container 1 so as to close the ink discharge port 4.
The urethane foam 5 is permanently deformed by thermal compression, and the number of cells after the deformation is as described above. The urethane foam 5 is a so-called three-dimensional reticulated foam from which a film formed during the production of the foam has been removed, and the film is removed by an explosion method.

By filling the space in the cavity 3 with urethane foam 7 having a cell number coarser than that of the urethane foam, the ink is excellent in holding the ink and the discharge and supply become more uniform. The urethane foam 7 in this case is larger than the number of cells of the foam 5 described above.

That is, the ink in the cavity 3 is retained by the urethane foam 7 and stored in the container 1 by capillary action, and is always a fixed amount by the superior capillary action of the urethane foam 5 from the discharge port 4. Is discharged and supplied. The ink is supplied to the outside by the negative pressure applied to the discharge port 4. At the same time, the same amount of air is supplied from the vent 2 to keep the balance. In this example, the same urethane foam 6 as described above is attached to the vent 2 to maintain the air pressure balance,
The intrusion of fine dust and the like into the cavity 3 is prevented.

In the present invention, the synthetic resin communication foam, in this case, urethane foam is attached to the inside of the cavity as well as to the inside of the cavity near the ink discharge port. A pin may be erected, and urethane foam may be interposed between the pin and the inner surface of the cavity, or may be interposed between the rib and the inner surface of the cavity. Further, it is also possible to attach a urethane foam to a perforated plate in advance, or to prepare a laminate in which the urethane foam is sandwiched between them, and to provide the laminate for the discharge port.

[0017]

According to the present invention, a liquid such as ink is held by the capillary phenomenon of a synthetic resin communicating foam filled in a cavity, and the number of cells is 50 to 200 cells / 25 mm at a liquid discharge port and a thickness of 1 mm. Since the synthetic resin communicating foam is attached, when the liquid such as ink stored in the cavity is supplied to the outside from the discharge port, a constant amount is always supplied due to the excellent capillary phenomenon. That is what it was. And, in the synthetic resin communicating foam used, for example, the amount of expensive members that require a post-process such as mechanical compression or permanent deformation due to thermal compression can be minimized, and a container excellent in cost is provided. It was provided.

[Brief description of the drawings]

FIG. 1 is a perspective view of an ink liquid holding container main body which is an example of a liquid holding container of the present invention.

FIG. 2 is a partially cutaway perspective view of an ink liquid holding container which is an example of the liquid holding container of the present invention.

FIG. 3 is a sectional view of a main part of the liquid holding container of FIG. 2;

[Explanation of symbols]

1) container body, 2) vent hole provided at the upper end of the container body, 3) container cavity, 4) ink discharge port, 5) synthetic resin communicating foam (urethane foam),
6 ‥‥ Urethane foam provided in the vent, 7 ‥‥ Urethane foam provided in the cavity.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B65D 23/00-25/56 B41F 31/02

Claims (2)

(57) [Claims] 1. A liquid holding container having a liquid outlet and a vent, wherein at least a cavity corresponding to the liquid outlet has 50 to 200 cells / 25 mm and a thickness of 1 mm.
The above-mentioned synthetic resin communication foam is attached, and the remaining space of the cavity is filled with a synthetic resin communication foam having a cell number of 5 to 100 cells / 25 mm coarser than the synthetic resin communication foam. A liquid holding container characterized by a capillary phenomenon for constantly supplying a constant amount from an outlet. 2. The liquid holding container according to claim 1, wherein the synthetic resin communicating foam is urethane foam or melamine foam.