Filter sheet for a screen door and a screen door with the filter sheet for a screen door

Abstract

To simplify the structure of a screen door filter sheet.SOLUTION: A screen door filter sheet 10 includes an air-permeable polyurethane foam 12 and locking means 14 that can be attached to and detached from a screen door SD. As the polyurethane foam 12, one having an open cell structure can be used. As the locking means 14, for example, a hook-and-loop fastener that can be hooked on a net NT of the screen door SD can be used. The polyurethane foam 12 can be provided with a decoration 16 such as an uneven pattern.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] This invention relates to a filter sheet for a screen door that is attached to a screen door.

Background Art

[0002] In recent years, the demand for indoor ventilation has been increasing. Along with this, the problem has arisen that pollen and the like that cannot be blocked by a screen door enter the room. Therefore, as in Patent Document 1, it has been proposed to make the screen door into a double structure of an outer frame and an inner frame, and sandwich a non-woven fabric between the outer frame and the inner frame to prevent the intrusion of pollen and the like.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, the screen door of Patent Document 1 has a special structure having an outer frame and an inner frame, and the structure is complicated.

[0005] In view of the above problems in the prior art, the present invention has been proposed to preferably solve these problems, and an object thereof is to provide a filter sheet for a screen door that can easily prevent the intrusion of pollen and the like.

Means for Solving the Problems

[0006] In order to overcome the above problems and achieve the intended object, the filter sheet for a screen door according to the present invention is characterized by comprising a polyurethane foam having air permeability and locking means detachable from the screen door.

Effects of the Invention

[0007] According to the filter sheet for a screen door according to the present invention, it is possible to easily prevent the intrusion of pollen and the like.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Modes for Carrying Out the Invention

[0009] Next, the filter sheet for a screen door according to the present invention will be described below with reference to the accompanying drawings by giving preferred embodiments.

Embodiment

[0010] The filter sheet for a screen door (hereinafter simply referred to as the filter sheet) 10 according to the embodiments shown in FIGS. 1 and 2 is mainly composed of a polyurethane foam 12. Further, the filter sheet 10 has a locking means 14 that can be attached to and detached from the screen door SD (see FIG. 4). The filter sheet 10 is attached to the net NT or the frame FL of the screen door SD by the locking means 14, and the polyurethane foam 12 is arranged so as to overlap the net NT (see FIGS. 3(a) and 5(a)). The filter sheet 10 can be attached to either the indoor side or the outdoor side of the screen door SD, but it is preferable to attach it to the indoor side because it can avoid falling outdoors even if it comes off the screen door SD.

[0011] The polyurethane foam 12 may be any of soft, semi-rigid, and rigid. Here, when it is a soft polyurethane foam 12, it has flexibility that allows it to be rounded, folded, etc., so it is preferable because it has good handleability such as storability during attachment, transportation, and when not in use.

[0012] The polyurethane foam 12 is formed in a sheet shape. The polyurethane foam 12 is set to be the same as or larger than the net NT (opening of the frame FL) of the screen door SD, for example. When the thickness of the polyurethane foam 12 is set in the range of, for example, 2 mm to 4 mm, it is preferable because it allows light transmission, is lightweight, and is easy to handle. Also, the density (JIS K7222) of the polyurethane foam 12 is, for example, 25 kg / m 3 ~80 kg / m 3 In this range, it is preferable because it is lightweight and easy to handle.

[0013] The polyurethane foam 12 has air permeability. The polyurethane foam 12 can ensure air permeability, for example, by having a closed-cell structure in which adjacent cells are connected, or by forming air holes. Here, as the polyurethane foam with a closed-cell structure, for example, those obtained by removing the cell membrane by dissolution, blast treatment, etc., or those made into a three-dimensional network structure by using a combination of a high-ethylene oxide (EO) content polyol and a low-ethylene oxide content polyol to make it difficult to form a cell membrane by promoting foam breakage during the reaction (for example, Patent No. 5906040), or those made into a three-dimensional network structure by a production method using a siloxane compound (for example, Japanese Patent Application Laid-Open No. 2011-037987) can be used. As a result, air flow in the thickness direction of the polyurethane foam 12 is allowed.

[0014] When the air permeability (JIS K6400-7 (Method A)) of the polyurethane foam 12 is in the range of, for example, 50 L / min to 200 L / min, it is preferable because it can prevent foreign substances such as pollen from entering the room and allows light transmission for proper ventilation. Also, when the cell count (Annex 1 of JIS K6400-1) of the polyurethane foam 12 is in the range of, for example, 20 cells / 25 mm to 80 cells / 25 mm, it is preferable because it can prevent foreign substances such as pollen from entering the room and allows light transmission for proper ventilation.

[0015] When the tensile strength (JIS K6400-5) of the polyurethane foam 12 is in the range of, for example, 80 kPa to 200 kPa, it is preferable because it can achieve both appropriate handleability and durability. Also, when the elongation (JIS K6400-5) of the polyurethane foam 12 is in the range of, for example, 80% to 100%, it is preferable because it can achieve both appropriate handleability and durability.

[0016] As shown in FIGS. 1 to 4, the decoration 16 is formed on the polyurethane foam 12. The presence of the decoration 16 on the polyurethane foam 12 improves the design of the filter sheet 10 and enhances the atmosphere around the window compared to the screen SD. The decoration 16 can be composed of, for example, one or a combination of color, pattern, ornament, shape, etc. Also, the decoration 16 may be in a partial range (Example) of the polyurethane foam 12 or over the entire polyurethane foam 12. As shown in FIG. 3(b), the decoration 16 of the example is a concavo-convex pattern. The decoration 16 of the example is formed to be recessed from one surface on the indoor side in the polyurethane foam 12, while the other surface on the screen SD side in the polyurethane foam 12 is flat. The decoration 16 of the example forms a three-dimensional concavo-convex pattern by a combination of a first recess 16a with a shallow recess and a second recess 16b with a deeper recess than the first recess 16a. The presence of the concavo-convex pattern decoration 16 on the polyurethane foam 12 further improves the design of the filter sheet 10 and enhances the atmosphere around the window even more compared to the screen SD. Note that the concavo-convex pattern of the decoration 16 may be a single stage or multiple stages of three or more stages.

[0017] The concavo-convex pattern decoration 16 can be formed, for example (Example), by melting a part of the polyurethane foam 12 with a laser or the like, or by compression molding by heat pressing the polyurethane foam 12 or the like. For example, in the case of laser processing, it becomes easier to ensure air permeability, and in the case of compression molding, the ability to remove foreign substances such as pollen can be improved, and there are also advantages in terms of the processing method. Also, the decoration 16 may be provided by printing with an inkjet printer or the like, and in the case of printing, relatively complex decoration 16 can be easily provided.

[0018] The decoration 16 can be formed on both sides or either side of the screen door SD side and the indoor side of the polyurethane foam 12, but it is preferably provided on the indoor side of the polyurethane foam 12. When there is a decoration 16 on the indoor side of the polyurethane foam 12, the decoration 16 becomes easier to see from the indoor side during the day when the window side is brighter than the indoor side. In particular, in the case of the decoration 16 with an uneven pattern, the three-dimensional effect of the decoration 16 can be improved.

[0019] Part or all of the polyurethane foam 12 may be colored. Coloring can be achieved by various methods such as adding a coloring agent to the raw material of the polyurethane foam 12, dyeing the polyurethane foam 12 after foam molding, or coloring it by printing.

[0020] The polyurethane foam 12 may be subjected to antibacterial treatment. For example, an antibacterial agent can be added to the raw material of the polyurethane foam 12 to give the polyurethane foam 12 antibacterial properties, the polyurethane foam 12 can be colored using a coloring agent with antibacterial properties, or an antibacterial agent can be applied to the polyurethane foam 12 to perform antibacterial treatment. By having the polyurethane foam 12 have antibacterial properties in this way, it is possible to suppress the generation of mold, which is preferable.

[0021] As shown in FIG. 4, the locking means 14 can be arranged at an appropriate position, such as at the edge of the polyurethane foam 12. In the embodiment, a hook-and-loop fastener is used as the locking means 14, and the hook 14a of the hook-and-loop fastener is hooked on the mesh of the net NT, and the filter sheet 10 is attached to the screen door SD (see FIG. 5(a)). Also, by removing the hook 14a from the mesh, the filter sheet 10 can be removed from the screen door SD. By using a hook-and-loop fastener as the locking means 14 in this way, the filter sheet 10 can be easily attached to and detached from the screen door SD with a simple configuration.

[0022] The filter sheet 10 has a simple structure in which the polyurethane foam 12 is attached to the screen door SD by the locking means 14. Although the filter sheet 10 has such a simple structure, even when ventilation is being carried out, the intrusion of foreign substances such as pollen into the room can be suppressed by the polyurethane foam 12. Further, since the filter sheet 10 can block the heat transfer between the inside and outside of the room due to the heat insulating property peculiar to the polyurethane foam 12, the heating and cooling effect inside the room can be improved. Since the polyurethane foam 12 is less permeable to water than a net or curtain with linearly perforated holes, it is difficult for rain to pour in while ensuring ventilation. Furthermore, since the filter sheet 10 is attached to the screen door SD by the locking means 14, it can be prevented from swaying like a curtain, and has a high blindfolding effect.

[0023] (Modification example) Not limited to the matters described above, for example, the following may be adopted. The present invention is not limited only to the specific descriptions of the embodiments and the following modification examples. (1) The locking means is not limited to the configuration of the embodiment, and may be another one such as a magnet or a locking pin. For example, the locking means 18 in the modification example shown in FIG. 6 passes the protrusion of the locking pin 18a through the polyurethane foam 12 and the mesh of the net NT, and attaches the pin receiver 18b to the protrusion protruding to the opposite side. In this way, the polyurethane foam 12 can be attached to the screen door SD by sandwiching the polyurethane foam 12 and the net NT with the locking pin 18a and the pin receiver 18b. (2) The object to which the locking means is attached is not limited to a net as in the embodiment, and may be, for example, a frame of a screen door. In this case, various locking means can be used, such as using a magnet that adheres to the frame of the screen door, or attaching a hook-and-loop fastener provided on the filter sheet for the screen door to a hook-and-loop fastener provided on the frame.

Description of reference numerals

[0024] 10 Filter sheet for screen door, 12 Polyurethane foam, 14 Locking means, 16 Decoration

Claims

1. A polyurethane foam having air permeability, and detachable locking means for a screen door, and a decoration is formed on the polyurethane foam, the decoration has a concavo-convex pattern, one surface of the polyurethane foam facing the screen door is formed flat, the decoration including the concavo-convex pattern recessed from the other surface is formed on the other surface of the polyurethane foam opposite to the one surface A filter sheet for a screen door, characterized by the above.

2. A polyurethane foam having air permeability, and detachable locking means for a screen door, and the polyurethane foam has a decoration of a concavo-convex pattern formed by the polyurethane foam itself being recessed A filter sheet for a screen door, characterized by the above.

3. The filter sheet for a screen door according to Claim 1 or 2, wherein the locking means is a hook-and-loop fastener that can be hooked on the mesh of the screen door.

4. The number of cells measured based on Appendix 1 of JIS K6400-1 of the polyurethane foam is in the range of 20 cells / 25 mm to 80 cells / 25 mm, the tensile strength measured based on JIS K6400-5 of the polyurethane foam is in the range of 80 kPa to 200 kPa, The elongation measured based on JIS K6400-5 of the polyurethane foam is in the range of 80% to 100%. The filter sheet for a screen door according to Claim 1 or 2.

5. A screen door, and a filter sheet for a screen door attached to the screen door, and the filter sheet for a screen door has a polyurethane foam having air permeability, and detachable locking means for the screen door, and the locking means is a hook-and-loop fastener provided with a hook that can be hooked on the mesh of the screen door, the hook is hooked on the mesh of the screen, and the filter sheet for a screen door is attached to the screen door A screen door with a filter sheet for a screen door, characterized by the above.

Images