JPS6346635Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an extensible molded body used as a constituent material of blinds installed in windows of buildings.

2. Description of the Related Art Conventionally, as a simple shielding material for blinds, a paper material whose cross section is bent into a zigzag shape is known. However, such materials made of paper have disadvantages such as not only poor strength and durability but also an extremely high risk of fire.

Therefore, in order to eliminate or alleviate the above-mentioned drawbacks, this invention aims to provide a stretchable molded body for blinds made of synthetic resin, and furthermore, it aims to solve the problem of uniform expansion throughout the entire body. This is a rational solution to the drawback of being difficult to obtain.

That is, the expandable molded body for blinds according to this invention has a large number of hard synthetic resin slats arranged in parallel with their faces facing each other, and the side edges of adjacent slats are sequentially turned to opposite sides. and a hinge part made of soft synthetic resin that is connected to each other at the side edge of the slat, and is formed in a zigzag shape in cross section, and the slat and the hinge part are integrally molded from the same or different synthetic resins that are compatible with each other. In addition, the hinge portions are characterized in that, when the slats are placed laterally, the upper portions of the hinge portions have greater bending elasticity than the lower portions.

This will be further explained with reference to the illustrated embodiment as follows.

In the illustrated embodiment, the molded body A includes a large number of band-shaped slats 1, a large number of hinge parts 2 having a U-shaped cross section by sequentially connecting the side edges of the slats, and side frame parts on both side edges. 3, and the slat 1 and hinge portion 2 are formed in a zigzag shape as a whole. The slat 1 is made of hard synthetic resin, and usually has a width W = 10 to 50 mm and a thickness T =
It is formed to a thickness of about 0.5 to 1.5 mm. The side frame portion 3 is formed as required, and is also made of hard synthetic resin. On the other hand, hinge part 2
The slats 1 are made of a soft synthetic resin with free flexibility, and when the plurality of slats 1 are arranged in parallel with their faces facing each other, the side edges of adjacent slats 1 are They are successively connected at opposite side edges.

Moreover, as shown in FIG. 2, this hinge portion 2 can be
As the hinge portion 2 is located in the upper part, that is, from the lower end to the upper end, the thickness of the hinge part 2 is gradually increased, so that the bending elasticity thereof becomes gradually larger. It is formed like this. Therefore, when the whole body is suspended by the side frame part 3 at the upper end, the gravity applied to the upper hinge part 2 and the lower hinge part 2 is different, but the gravity applied thereto is approximately the same. By elastically deforming,
A substantially uniform expansion state can be obtained throughout the molded body A.

The molded article A as described above is produced by an extrusion molding machine, while a hard synthetic resin is supplied to the slat molding part of the molding die, and at the same time, a compound that is well integrated with the resin is supplied to the hinge molding part. It is manufactured by supplying a soft, soluble synthetic resin and extruding it all at once. Therefore, slat 1
From relatively small slats with a length of about 10 slats to fairly long slats with over 100 slats, the entire slat is molded to the required length according to the height of the window. It is.

At the time of being extruded from the molding die, the two adjacent slats 1, 1 are molded into a state in which they are slightly opened into a V-shaped cross section through the hinge portion 2. However, immediately after extrusion, at a time when the slats 1, 1 are not yet fully cured, the slats 1, 1 are closed together so that their surfaces almost touch each other,
It is kept in that state and cooled. Therefore, by such a forming means, the product has a slight elasticity in the hinge portion 2 in the direction of closing the slats 1, 1 together.

As the synthetic resin constituting the slat 1 and the hinge portion 2, for example, vinyl chloride resin, polyolefin resin, etc., which are prepared by changing the amount of plasticizer to suit each hardness, can be suitably used.

When using the molded body A as described above, the first
As shown in the figure, the slats 1 are arranged horizontally and the side frame portions 3 at the upper ends are attached to the upper stile of the window frame, so that the slats 1 are suspended from the inner surface of the window. Then, a hole 4 is made at a position corresponding to each slat 1 near both ends of the molded body, and a string 5 for lifting and lowering is passed through the hole 4, and the lower end of the string 5 is attached to the lower side frame 3. By being fastened, it can be opened and closed by operating the string 5. Note that 6 in FIG. 1 is a guide roller for the string 5.

As mentioned above, the molded article according to this invention is formed by connecting a large number of hard synthetic resin slats through a soft synthetic resin hinge, and has a zigzag cross section. It can be freely expanded and contracted between a folded state and an expanded state in a direction perpendicular to the length direction of the material, and has functionality suitable for use as a shielding material for blinds. Also, since it is made of resin, it is less flammable and less likely to cause a fire than those made of paper. Moreover, since the hard slat 1 acts as a strength member, it has the required rigidity and strength as a whole, and has excellent durability. It can be used to maintain a shielded state. Moreover, it can be made to have a feeling of weight and an excellent appearance.
Furthermore, since the hinge portions 2 are designed to have progressively greater bending elasticity as they are located higher up, the degree of opening between the adjacent slats 1, 1 in the upper and lower portions is made uniform in the expanded state, so that the so-called A good appearance can be achieved when the blinds are lowered. Moreover, since this molded body is manufactured by extrusion molding as described above, it is easily mass-producible and can be manufactured at low cost. Therefore, compared to conventional blinds manufactured by connecting individual slats together, it can be manufactured and provided at a much lower cost, and on the other hand, as a constituent material for simple blinds, it has better quality and performance than conventional paper-made ones. We can offer superior quality products at similar prices.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention; FIG. 1 is a perspective view of the device in use, and FIG. 2 is an enlarged sectional view with the intermediate portion omitted. A...Molded body, 1...Slat, 2...Hinge part.

Claims (1)

[Claims for Utility Model Registration] (1) A large number of hard synthetic resin slats arranged in parallel with their faces facing each other, and the side edges of adjacent slats being successively moved to opposite sides. The slat and hinge portion are formed in a zigzag shape in cross section and are made of a soft synthetic resin that are connected to each other at the edges, and the slat and the hinge portion are integrally molded from the same or different types of synthetic resin that are compatible with each other. In addition, the hinge portion is
1. A telescopic molded body for a blind, characterized in that when the slats are arranged horizontally, the upper slats have greater bending elasticity than the lower slats. (2) The expandable molded body for a blind according to claim 1, wherein the bending elasticity of the hinge portion is changed by changing its wall thickness.