JP2019027172A - Pleat screen - Google Patents

Abstract

To provide a pleat screen to allow the operability to be better than those of conventional screens.SOLUTION: A pleat screen in accordance with the present invention provided with a screen folded in a zigzag shape and a lifting code to allow the screen to be lifted by pulling-in/pulling-out the lifting code which is inserted through an insertion hole arranged in the screen is made of fiber. A fastened part formed by fastening at least a part of cut ends of fiber in an inner edge of the insertion hole to each other is provided.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a pleated screen which is one of shielding devices.

  Various shielding devices such as a roll curtain, a blind, an accordion curtain, a pleated screen, a pleated screen door, and a partition are in practical use. There is a need for a shielding device that is highly operable for the operator.

  For example, Patent Document 1 discloses that a shielding device with high operability is realized by adding ingenuity to a code equalizer used for a shielding device (including a pleated screen). Specifically, the cord equalizer is provided with a structure that imparts a loose resistance and increases the resistance during a pulling operation. However, this is only an example, and there are various factors that improve (or lower) the operability of the shielding device, and there is a need for a more preferable operability improving method suitable for the structure and material of the pleated screen. It can be said.

Japanese Patent Laying-Open No. 2015-098754

  The present invention has been made in view of such circumstances, and provides a pleated screen with higher operability than conventional ones.

  According to the present invention, the pleat includes a screen that is folded in a zigzag manner, and a lifting / lowering cord, the insertion hole is provided in the screen, and the lifting / lowering cord is inserted into the lifting / lowering cord to be pulled in / out. A pleat, wherein the screen is made of fibers, and at least a part of the cut ends of the fibers are fixed to each other at the inner edge of the insertion hole. A screen is provided.

  In the pleated screen according to the present invention, the screen is made of fiber, and at least some of the cut ends of the fiber are fixed to each other at the inner edge of the insertion hole, so that the friction between the inner edge of the insertion hole and the lifting / lowering cord passing through the inner edge is reduced. Can be reduced. That is, a pleated screen with higher operability can be realized.

  Hereinafter, various embodiments of the present invention will be exemplified. The following embodiments can be combined with each other.

Preferably, the fixing portion is a portion formed by applying heat or ultrasonic vibration to the inner edge of the insertion hole.
Preferably, the fixing part is a part formed by applying heat to the inner edge of the insertion hole, and the heat penetrates the screen with a hole processing shaft to form the insertion hole, This is the frictional heat between the inner edge of the insertion hole and the hole processing shaft produced when the hole processing shaft is rotated while the hole processing shaft is penetrated through the insertion hole.
Preferably, the screen is made of synthetic fiber, woven fabric or non-woven fabric.
Preferably, the screen is made of a woven fabric, and the cut ends are a plurality of cut ends of a fiber bundle of the woven fabric, and at least one set of the adjacent cut ends is fixed to each other.
Preferably, the screen is made of a non-woven fabric, the insertion hole has a substantially circular shape with a radius r, and d is a maximum one of the distances in which the cut edge protrudes in the center direction of the circular shape. The value of d / r is 0.15 or less.
Preferably, 30% or more of the cut ends are fixed to each other.
Preferably, 70% or more of the cut ends are fixed to each other.
Preferably, the cut ends are welded and fixed to each other.
Preferably, the cut end is adhered and fixed by infiltrating another resin material.

It is a simplified perspective view which shows the pleat screen which concerns on 1st and 2nd embodiment, and has shown especially the front side. It is the simplified perspective view seen from the angle different from FIG. 1, and has shown especially the back side. It is the simple perspective view seen from the angle different from FIG. 1, FIG. 2, especially the side surface side is shown. It is detail drawing which shows the aspect by which the raising / lowering cord 5 is penetrated by the penetration hole 2a. 3 is a schematic view of an insertion hole 2a formed in the screen 2. FIG. FIG. 6B is a photograph of the insertion hole 2a provided in each pleat piece 2b in the pleat screen according to the first embodiment. In particular, FIG. 6B is an enlarged view of FIG. 6A. It is a comparative example (comparative example 1) with 1st Embodiment, Comprising: It is a photograph of the insertion hole 2a provided in each pleat piece 2b in the pleat screen which concerns on a prior art. FIG. 5 is a perspective view showing a process of forming an insertion hole 2a using a hollow drill 8. FIG. 5 is a perspective view showing a process of forming an insertion hole 2a using a hollow drill 8. FIG. 5 is a perspective view showing a process of forming an insertion hole 2a using a hollow drill 8. In the pleat screen concerning a 2nd embodiment, it is a photograph of penetration hole 2a provided in each pleat piece 2b. It is a comparative example (comparative example 2) with 2nd Embodiment, Comprising: It is a photograph of the insertion hole 2a provided in each pleat piece 2b in the pleat screen which concerns on a prior art. It is a perspective view which shows the process of forming the insertion hole 2a using the drill 9 and the hot wire 10. FIG. It is a perspective view which shows the process of forming the insertion hole 2a using the drill 9 and the hot wire 10. FIG. It is a perspective view which shows the process of forming the insertion hole 2a using the drill 9 and the hot wire 10. FIG. It is a photograph of the insertion hole 2a formed using the drill 9 and the hot wire 10.

1. First Embodiment Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. Various characteristic items shown in the following embodiments can be combined with each other.

1.1 Overall Configuration FIGS. 1 to 4 are diagrams showing a pleated screen according to the first embodiment. Specifically, FIG. 1 is a simplified perspective view (mainly the front side) showing the pleated screen according to the first embodiment, and FIG. 2 is a simplified perspective view (mainly viewed from an angle different from FIG. 1). 3 is a simplified perspective view (mainly the side surface side) seen from an angle different from that of FIGS. 1 and 2, and FIG. FIG. As shown in FIGS. 1 to 3, the pleated screen according to the first embodiment is supported by hanging a screen 2 that can be bent in a zigzag shape vertically from the head box 1, and a bottom rail at the lower end of the screen 2. 3 is attached. The screen 2 is formed by bending a piece of fabric in a zigzag shape. The screen 2 will be described in detail in section 1.2.

  Two lift cords 5 are suspended in the longitudinal direction of the head box 1. Preferably, it hangs down to a position having symmetry in front view. One end of the lifting / lowering cord 5 is connected to the bottom rail 3. The other end of the lifting / lowering cord 5 is guided to one side of the head box 1 through a self-weight drop prevention device (not shown) inside the head box 1 and one end thereof is connected to the code equalizer 4a. One end of the operation cord 4 is connected to 4a. The other end of the operation cord 4 is connected to the bottom rail 3. When the operator operates the operation cord 4 (connected to the lift cord 5), the screen 2 can be lifted and lowered together with the bottom rail 3. For example, when the operator pulls out the operation cord 4, the screen 2 is folded upward by lifting the bottom rail 3. Note that the bottom rail 3 can be positioned at an arbitrary position by the self-weight drop prevention device. That is, if the operator stops the operation of pulling out the operation cord 4 (elevating cord 5) and releases it, the weight drop prevention device is activated to prevent the bottom rail 3 from falling down and the weight drop prevention device is activated. When the operation cord 4 (elevating cord 5) is slightly pulled downward from the state, the operation of the own weight lowering prevention device is released, and the bottom rail 3 can be lowered by its own weight.

  In place of the above configuration, the other end of the lifting / lowering cord 5 is attached to a winding shaft provided inside the head box 1, and is wound or wound on the winding shaft by operation of an operating device (not shown). The structure which can be returned may be sufficient. When the lifting / lowering cord 5 is wound around the winding shaft, the bottom rail 3 is pulled up and the screen 2 is folded upward, and when the lifting / lowering cord 5 is unwound from the winding shaft, the bottom rail 3 is lowered. Thus, the screen 2 is extended downward.

  The two lifting cords 5 are suspended while being inserted through an insertion hole 2a provided in the screen 2 (an example of an “insertion hole” in the claims). In particular, FIG. 4 shows a mode in which the lifting / lowering cord 5 is inserted through the insertion hole 2a. Here, the insertion hole 2 a is provided in the approximate center of each pleat piece 2 b in the screen 2. The front side of the screen 2 may be either inside the room or outside the room. In the pleated screen, the light shielding performance is very important. Therefore, it is preferable that the insertion hole 2a has a minimum size that can realize the lifting function. In general, a millimeter order insertion hole 2a can be implemented.

  As shown in FIGS. 2 and 3, the pitch holding cord 6 is suspended from the head box 1 on the back side of the screen 2. The pitch holding cord 6 has an upper end attached to the head box 1 and a lower end attached to the bottom rail 3. The pitch holding cord 6 is set to a length that is substantially tensioned when the bottom rail 3 is lowered to the lower limit.

  As shown in FIGS. 2 to 4, the pitch holding cord 6 is provided with a large number of annular holding portions 7 at equal intervals. In particular, as shown in FIG. 4, the pitch holding cord 6 is a cord in which warp yarns are formed by knitting yarn with a knitting machine, and the yarn is knitted to form a holding portion 7 in the cord. And the thread | yarn is exposed cyclically | annularly for every fixed space | interval, and the holding part 7 is formed.

  Here, in relation to the pitch holding cord 6, as shown in FIG. 4, the lifting / lowering cord 5 exposed to the holding portion 7 of the pitch holding cord 6 on the back side between the two insertion holes 2 a adjacent to each other. Note that is inserted. In other words, the holding portion 7 in the pitch holding cord 6 is configured to surround the side circumference of the lifting / lowering cord 5.

  With such a configuration, as shown in FIGS. 1 to 3, when the bottom rail 3 is lowered to the lower limit, the holding portions 7 support the pleat pieces 2 b from below, and the folds of the screen 2 are equally spaced. To be held.

  The operation of such a pleated screen is summarized as follows.

  When the bottom rail 3 is lowered to the lower limit, the screen 2 is extended downward. At this time, the front and rear edges of the bottom rail 3 are supported by the lifting / lowering cord 5 and the pitch holding cord 6, and the bottom rail 3 is suspended and supported so that the upper surface thereof is substantially horizontal. Further, the folds of the screen 2 are held at substantially equal intervals by the holding portion 7 of the pitch holding cord 6. When the operator pulls out the operation cord 4 (elevating cord 5) from this state, the bottom rail 3 is pulled up and the screen 2 is folded upward.

1.2 Screen 2
Subsequently, the above-described screen 2 will be described in further detail. In the first embodiment, the screen 2 is a screen 2 made of polyester (plain weave) lace (an example of “woven fabric” in the claims). As described above, each pleat piece 2b constituting the screen 2 is provided with an insertion hole 2a through which the elevating cord 5 is inserted.

  FIG. 5 is a schematic diagram of the insertion hole 2a, and FIGS. 6A and 6B are photographs of the insertion hole 2a (image processing, reference numerals and the like are added). As shown in FIGS. 5, 6A, and 6B, at least a part of the cut ends 2f of the fibers (a plurality of fiber bundles 2ea in the race) are fixed to each other at the inner edge 2c (so-called edge portion) of the insertion hole 2a, so that the smooth It is characterized by being. On the other hand, FIG. 7 is a comparative example (comparative example 1) with the first embodiment, and is a photograph of the insertion holes 2a provided in each pleat piece 2b in the pleated screen according to the prior art.

  When the insertion holes 2a are provided in each pleat piece 2b, a load is applied to the fibers of the pleat piece 2b using a tool such as a drill, for example, to perform a penetration process. At this time, if attention is paid to the inner edge 2c, the fiber bundle 2ea is cut off, and the cut end 2f of the fiber bundle 2ea is directed toward the center of the insertion hole 2a (substantially circular shape) as shown in FIG. 7 (Comparative Example 1). It is possible to confirm the mode of protruding or popping out. In such a state, the friction coefficient of the inner edge 2c is increased. Therefore, when the elevating cord 5 moves up and down (that is, when the pleat screen is opened and closed), an unnecessary frictional force is generated and the operability is impaired. Further, the state in which the cut end 2f protrudes alone is fragile as the fiber bundle 2ea, and when the elevating cord 5 is moved up and down, it is easy to receive damage such as fraying from there.

  On the other hand, in the pleated screen according to the first embodiment, a state in which the fiber bundle 2ea after the penetrating process is further fixed and the cut end 2f of the fiber bundle 2ea protrudes or jumps out as much as possible is possible. It is preventing. In particular, note that the cut ends 2f of at least one pair of adjacent fiber bundles 2ea are fixed. For example, in FIGS. 6A and 6B, it can be confirmed that the cut ends 2fa and 2fb are fixed to each other.

  Of the cut ends 2f of the plurality of fiber bundles 2ea, the ratio of the fixed cut ends 2f is, for example, 30% or more, preferably 50% or more, and more preferably 70% or more. Specifically, for example, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 82, 84, 86, 88, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100%, and may be within a range between any two of the numerical values exemplified here.

  In the present embodiment, the insertion hole 2a is formed by the following method. First, as shown in FIGS. 8 to 9, the hollow drill 8 penetrates the screen 2 by pressing the tip of the hollow drill (hole drilling shaft) 8 against the screen 2 while rotating the hollow drill 8 with the screen 2 folded. Thus, the insertion hole 2a is formed. In this state, similarly to FIG. 7, the cut edge 2f protrudes toward the center of the insertion hole 2a at the inner edge 2c of the insertion hole 2a. In the present embodiment, even after the insertion hole 2a is formed, the hollow drill 8 is continuously rotated while the hollow drill 8 is passed through the insertion hole 2a. As a result, the frictional heat generated between the hollow drill 8 and the inner edge 2c raises the temperature of the inner edge 2c to a temperature equal to or higher than the melting temperature of the fiber, and the cut end 2f is melted and fixed, and FIG. 6A and FIG. As shown, the cut end 2f does not protrude from the inner edge 2c of the insertion hole 2a.

2. Second Embodiment Next, a pleated screen according to a second embodiment will be described. The basic configuration is the same as that of the pleated screen according to the first embodiment, but it should be noted that a nonwoven fabric is adopted as the screen 2.

  FIG. 11 is a photograph of the insertion hole 2a provided in each pleat piece 2b in the pleated screen according to the second embodiment (added with image processing, reference numerals, and the like). As shown in FIG. 11, at least a part of the cut ends 2f of the fibers 2eb are fixed to each other at the inner edge 2c (so-called edge portion) of the insertion hole 2a and are smooth. On the other hand, FIG. 12 is a comparative example (Comparative Example 2) with the second embodiment, and is a photograph of the insertion holes 2a provided in each pleat piece 2b in the pleated screen according to the prior art.

  Here, regarding the cut end 2f of the fiber 2eb, if the radius of the insertion hole 2a (substantially circular) is r and the maximum protrusion distance in the center direction of the insertion hole 2a is d, in the second embodiment, d / r The value of is 0.15 or less, preferably 0.10 or less, and more preferably 0.08 or less. Specifically, for example, d / r = 0.15, 0.14, 0.13, 0.12, 0.11, 0.10, 0.09, 0.08, 0.07, 0.06, 0.05, 0.04, 0.03, 0.02, 0.01, 0.009, 0.008, 0.007, 0.006, 0.005, 0.004, 0.003, 0. 002 and 0.001, and may be within a range between any two of the numerical values exemplified here.

  With such a configuration, there is an effect that the friction coefficient at the inner edge 2c can be reduced and the operability can be further improved in the second embodiment, and the inner edge 2c becomes more robust by being further fixed, and the above-mentioned There is an effect that damage can be prevented.

3. Further, the pleated screen according to the embodiment can be realized in the following aspects.

(1) As an example, a lace and a non-woven fabric have been described. However, for example, a pleated screen made of glass fiber and vinyl chloride may be implemented. The lace or nonwoven fabric may be made of nylon or acrylic fiber instead of polyester fiber. Even in such a case, the above-described various effects can be achieved by fixing the fiber cut ends 2f to the inner edge 2c (so-called edge portion) of the insertion hole 2a.

(2) In the first embodiment, the fixing of the cut end 2f is realized by applying heat to the inner edge 2c of the insertion hole 2a by rotating the hollow drill 8 as a hole processing shaft body. A non-hollow drill may be used. Further, instead of rotating the drilling shaft, the inner edge 2c may be heated by ultrasonic vibration.

(3) In the first embodiment, the cut end 2f is fixed by continuously rotating the hole processing shaft body with the hole processing shaft body penetrating the screen 2, but when the insertion hole 2a is formed in the screen 2, By increasing the rotational speed of the hole machining shaft body, the temperature of the inner edge 2c of the insertion hole 2a may be raised to fix the cut end 2f. In this case, immediately after the insertion hole 2a is formed in the screen 2, the rotation of the drilled shaft body can be stopped, and the manufacturing efficiency is excellent.

(4) In the first embodiment, the cut end 2f is fixed by frictional heat. However, as shown below, the cut end 2f may be fixed by heat from the outside. First, as shown in FIG. 13 to FIG. 14, while the drill (hole machining shaft body) 9 is rotated with the screen 2 folded, the tip 2 is pressed against the screen 2 to penetrate the screen 2 with the drill 9. The insertion hole 2a is formed. In this state, as shown in FIG. 14, at the inner edge 2c of the insertion hole 2a, the cut end 2f protrudes toward the center of the insertion hole 2a. Next, as shown in FIGS. 14 to 15, the hot wire 10 is inserted through the insertion hole 2 a. As a result, the temperature of the inner edge 2c is raised to a temperature equal to or higher than the fiber melting temperature, the cut end 2f is melted and fixed, and the cut end 2f does not protrude from the inner edge 2c of the insertion hole 2a as shown in FIG. become. As the heating wire 10, a heating wire that generates heat by applying a voltage, such as a nichrome wire or tungsten, can be used.

(5) The fixing of the cut end 2f may be performed by infiltrating the fiber with a resin material that functions as an adhesive. Further, the cut end 2f may be fixed by a paste coating.

4). Conclusion As described above, according to the present embodiment, it is possible to provide a pleated screen with higher operability.

  While various embodiments according to the present invention have been described, these are presented as examples and are not intended to limit the scope of the invention. The novel embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. The embodiments and the modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1: Head box 2: Screen 2a: Insertion hole 2b: Pleated piece 2c: Inner edge 2ea: Fiber bundle 2eb: Fiber 2f: Cut end 2fa: Cut end 2fb: Cut end 3: Bottom rail 4: Operation cord 4a: Cord equalizer 5: Lifting cord 6: Pitch holding cord 7: Holding portion 8: Hollow drill 9: Drill 10: Hot wire r: Radius d: Projection distance

Claims (10)

A pleat screen comprising a screen folded in a zigzag and a lifting / lowering cord, wherein the screen is provided with an insertion hole, and the lifting / lowering cord is inserted into the lifting / lowering cord by being inserted / extracted.
The screen is made of a fiber, and among them, at least a part of the cut ends of the fiber is provided at the inner edge of the insertion hole, and a fixing portion formed by being fixed to each other is provided.
Pleated screen.   2. The pleated screen according to claim 1, wherein the fixing portion is a portion formed by applying heat or ultrasonic vibration to an inner edge of the insertion hole. The fixing part is a part formed by applying heat to the inner edge of the insertion hole,
The heat passes through the screen with a hole processing shaft body to form the insertion hole, and then the hole processing shaft body is rotated while the hole processing shaft body is passed through the insertion hole. 2. The pleated screen according to claim 1, wherein the pleated screen is friction heat between an inner edge of the insertion hole to be generated and the drilled shaft body. The screen is made of synthetic fiber, woven fabric or non-woven fabric,
The pleated screen according to claim 1. The screen is made of woven fabric,
The cut ends are a plurality of cut ends of the fiber bundle of the woven fabric,
Among these, at least one set of adjacent cut edges are fixed to each other,
The pleated screen according to claim 4. The screen is made of non-woven fabric,
The insertion hole has a substantially circular shape with a radius r,
If the maximum distance among the distances at which the cut ends project in the center direction of the circle is d,
the value of d / r is 0.15 or less,
The pleated screen according to claim 4. 30% or more of the cut edges are fixed to each other,
The pleated screen according to any one of claims 1 to 6. 70% or more of the cut edges are fixed to each other,
The pleated screen according to claim 7. The cut ends are welded and fixed to each other,
The pleated screen according to any one of claims 1 to 8. The cut end is adhered and fixed by infiltrating another resin material,
The pleated screen according to any one of claims 1 to 9.