JP2016023422A - Pleated screen - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pleated screen having a screen that may be folded in a zigzag form.SOLUTION: A pleated screen of the invention has a screen 7 formed by a deposition pattern 10, where the deposition pattern 10 has a form that conforms to a predetermined shrinkage resistance and deposition strength. Desirably, a unit deposition pattern P1 of the deposition pattern 10 has a form having deposition parts in both areas parted by a boundary marked by a line passing through a center in one direction. More desirably, the unit deposition pattern P1 of the deposition pattern 10 has a deposition part formed almost perpendicular to the one direction.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a pleated screen having a screen that can be bent in a zigzag shape.

  The pleated screen suspends and supports a screen that can be bent in a zigzag shape in the vertical direction, and adjusts the amount of light appropriately by moving the screen up and down.

  In the pleated screen, in order to be able to bend the screen in a zigzag shape, joining pieces are respectively provided by means of welding or the like on one fold line of the fabric having the zigzag fold line. Using this joining piece, it is possible to join with another joining piece of cloth by means such as welding. Further, the joining piece is provided with an insertion hole through which a lifting / lowering cord suspended from the head box can be inserted. For example, the lower end of the lifting / lowering cord is attached to the bottom rail. Therefore, the pleated screen can extend the screen downward by raising and lowering the bottom rail via the lifting cord, or can fold the screen upward.

  As a technique for forming such a joining piece, a technique of welding in a broken line shape in the longitudinal direction (left-right direction) of the screen is known (for example, see Patent Document 1).

US Pat. No. 4,974,656

  As disclosed in Patent Document 1, there is known a technique of welding in a broken line shape in the longitudinal direction (left-right direction) of the screen in order to provide a joining piece at the fold of the fabric.

  However, in the technique of welding in a broken line shape in the longitudinal direction (left and right direction) of the screen, there is a problem that, for example, when the fabric has heat shrinkability, the welded portion contracts and the entire screen is warped. .

  Accordingly, a welding technique is desired that is less likely to warp as a whole screen even if the fabric has heat shrinkability.

  In view of the above problems, an object of the present invention is to provide a pleated screen having a screen that can be bent in a zigzag shape.

  A pleated screen according to an aspect of the present invention is a pleated screen having a screen that can be bent in a zigzag shape, and includes a screen formed by continuously welding fabrics in one direction in a predetermined unit welding pattern. The unit welding pattern has a shape satisfying predetermined shrinkage resistance and welding strength.

  Further, in the pleated screen according to the present invention, the unit welding pattern satisfies the predetermined shrinkage resistance and welding strength as a whole in both regions divided by the boundary with the one direction passing through the center as a boundary. It has the shape which a welding part exists.

  In the pleated screen according to the present invention, the unit weld pattern is configured to include one or more of one or more dots, one or more line segments, and one or more curve segments.

  Further, in the pleated screen according to the present invention, the welded portion constituting the unit weld pattern has a weld width of all welded portions constituting the welded portion parallel to the one direction being a predetermined value or less, and the unit weld pattern The welding area of the whole welding part is comprised so that it may become a predetermined value or more, It is characterized by the above-mentioned.

  Further, in the pleated screen according to the present invention, the unit welding pattern has a welding portion inclined at a predetermined angle with respect to the one direction.

  In the pleated screen according to the present invention, the unit welding pattern is formed of a welding portion substantially perpendicular to the one direction.

  According to the present invention, it is possible to configure a pleated screen having a screen formed in such a manner that even a fabric having heat shrinkability does not easily warp as a whole screen.

It is a side view which shows schematic structure in the pleat screen of one Embodiment by this invention. (A), (b), (c) is a figure which shows the outline of the welding pattern of Example 1 in the pleated screen of one Embodiment by this invention, respectively, and the outline of the comparative examples 1 and 2, respectively. (A), (b) is a figure explaining the effect | action and effect of the welding pattern of Example 1, and the effect | action of the comparative example 1 in the pleated screen of one Embodiment by this invention, respectively. (A), (b), (c) is a figure explaining the working conditions of the welding pattern of Example 1 in the pleated screen of one Embodiment by this invention, and the comparative examples 1 and 2 contrasted with this, respectively. . (A) thru | or (h) is explanatory drawing of the welding pattern of another Example in the pleat screen of one Embodiment by this invention, respectively. (A), (b) is a side view which shows the outline of the pleat screen of another embodiment which has a screen to which the welding pattern which concerns on this invention is applied.

  Hereinafter, a pleated screen according to an embodiment of the present invention will be described with reference to the drawings. In the specification of the present application, the upper side and the lower side of the pleated screen shown in FIG. 1 are respectively upward (or upper) and downward (or lower) according to the screen hanging direction. The left direction in the figure is defined as the front side (inside the room) of the pleated screen, and the right direction in the figure is defined as the back side (outside of the room) of the pleat screen. The side on which the side view of FIG. 1 is viewed is the right side. For example, when referring to the left-right direction of the pleated screen (longitudinal direction of the screen), the direction perpendicular to the illustrated surface in the side view of FIG.

(Overall configuration of pleated screen)
FIG. 1 is a side view showing a schematic configuration of a pleated screen according to an embodiment of the present invention. The pleated screen shown in FIG. 1 suspends and supports a screen 7 that can be bent in a zigzag shape in the vertical direction from the head box 1, and the screen 7 is passed through an operating device (not shown) provided in the head box 1. The amount of light extraction is adjusted appropriately by moving up and down with an operation cord 9 (for example, a ball chain).

  The screen 7 is provided with a joining piece 7b formed by welding based on the welding pattern according to the present invention on one fold line of the fabric having the zigzag fold line 7a. By using this joining piece 7b, it is possible to join to the joining piece 7b of another fabric by the welding. Further, the joining piece 7b is provided with an insertion hole 7c through which the lifting / lowering cord 3 suspended from the head box 1 can be inserted, and the lower end of the lifting / lowering cord 3 is attached to the bottom rail 5.

  And the operation cord 9 is comprised, for example with an endless ball chain, and is wound around the pulley accommodated rotatably in the operating device which is not shown in figure. A plurality of recesses into which the ball portions of the ball chain of the operation cord 9 are fitted are formed on the outer peripheral surface of the pulley.

  A transmission gear composed of a plurality of gears is connected to the pulley in the head box 1, and this transmission gear is connected to each transmission clutch (not shown). Therefore, the rotation of the pulley is transmitted to the rotation drive shaft via each transmission clutch by this transmission gear.

  In the head box 1, a plurality of winding shafts (not shown) are provided with respect to the screen 7 and arranged in parallel. Then, the winding shaft that is rotatably supported in the head box 1 is rotated by the rotation of the rotary drive shaft, and the screen 7 is moved up and down by the winding and unwinding of the lifting / lowering cord 3.

  In the head box 1, a stopper device (not shown) for controlling the rotation of the rotary drive shaft is disposed. When the operation cord 9 is released after the bottom rail 5 is lifted, the weight of the bottom rail 5 is reduced. Descent is prevented.

  In addition, a pitch holding cord 4 is suspended from the head box 1 and attached to the bottom rail 5 behind the lifting cord 3, that is, on the outdoor side. The lifting / lowering cord 3 is inserted into an annular support cord 6 provided in a large number at equal intervals on the pitch holding cord 4. When the bottom rail 5 is lowered and the screen 7 is stretched, the joining piece 7b of the screen 7 is supported by the support cord 6, and the folds 7a of the screen 7 are held at substantially equal intervals.

  The pleated screen configured as described above is capable of extending the screen 7 downward by raising and lowering the bottom rail 5 or folding the screen 7 upward.

(Welding pattern)
FIG. 2A is a diagram showing an outline of the welding pattern 10 of Example 1 in the pleated screen of one embodiment according to the present invention, and FIGS. It is a figure which shows the outline of welding pattern 10a, 10b.

  First, referring to FIG. 2A, the welding pattern 10 of Example 1 according to the present invention is configured to have a welded portion in a horizontal streak shape. More specifically, the joining piece 7b of the screen 7 according to the first embodiment has a linear welding portion substantially perpendicular to the longitudinal direction of the screen 7 as a unit welding pattern in the left-right direction (longitudinal direction of the screen 7). It is formed by continuously welding the dough.

  On the other hand, referring to FIG. 2B, this is the same as the technique disclosed in Patent Document 1, but the welding pattern 10a of Comparative Example 1 is a broken line in the left-right direction (longitudinal direction of the screen 7). It is comprised so that it may have a welding part in a shape. More specifically, the joining piece 7b of the screen 7 in the comparative example 1 has a linear welding portion substantially parallel to the longitudinal direction of the screen 7 as a unit welding pattern in the left-right direction (longitudinal direction of the screen 7). It is formed by continuously welding the dough.

  Furthermore, referring to FIG. 2C, the welding pattern 10b of the comparative example 2 is configured to have a single dot-like welding portion in a dotted line direction in the left-right direction (longitudinal direction of the screen 7). . More specifically, the bonding piece 7b of the screen 7 in the comparative example 2 has the dough continuously welded in the left-right direction (longitudinal direction of the screen 7) with a single-dot welded portion as a unit weld pattern. It is formed by.

  Hereinafter, the operation and effect of the welding pattern 10 of Example 1 and the operation of the welding patterns 10a and 10b of Comparative Examples 1 and 2 will be described in detail. First, FIG. 3A is a diagram showing the operation and effect of the welding pattern 10 of Example 1 in the pleated screen of one embodiment according to the present invention, and FIG. 3B is the welding pattern of Comparative Example 1. It is a figure explaining the effect | action of 10a.

  Referring to FIG. 3A, the welding pattern 10 of the first embodiment is configured to have a welded portion in a horizontal streak shape, and the joining piece 7b of the screen 7 in the first embodiment is formed in the left-right direction (the length of the screen 7). Direction) is a processing direction, and a substantially vertical linear welded portion is formed by continuously welding the dough by a unit welding pattern.

  Thus, since the welding pattern 10 of Example 1 uses the linear welding part substantially perpendicular | vertical with respect to the longitudinal direction of the screen 7 as a unit welding pattern, even if it is the fabric | heater which has heat shrinkability, for example, the process Thermal shrinkage with respect to the direction is suppressed, and the cloth 7 does not bend as a whole.

  On the other hand, referring to FIG. 3B, the welding pattern 10a of the comparative example 1 is configured to have a welding portion in a broken line shape in the left-right direction (longitudinal direction of the screen 7). The joining piece 7b is formed by continuously welding the dough by a unit welding pattern with substantially parallel linear welded portions with the horizontal direction (longitudinal direction of the screen 7) as the processing direction.

  Then, since the welding pattern 10a of the comparative example 1 uses the linear welding part substantially parallel to the longitudinal direction of the screen 7 as a unit welding pattern, for example with respect to the process direction with respect to the cloth which has heat shrinkability. The heat shrinkage becomes so large that it cannot be ignored, and the cloth 7 is bent as a whole.

  In order to prevent such fabric bending, the welding pattern 10b of Comparative Example 2 described above may be configured to have a single-dot welded portion in the longitudinal direction (left-right direction) of the screen 7. Conceivable. However, in the welding pattern 10b of the comparative example 2, since the area of the welding portion is reduced and the welding strength is reduced as compared with the welding pattern 10 of the first embodiment and the welding pattern 10a of the comparative example 1, the welding portion is reduced. The problem that it peels easily arises.

  Therefore, the welding pattern 10 of Example 1 that satisfies the shrinkage resistance and welding strength of the fabric is suitable as the welding pattern for forming the joining piece 7b of the screen 7.

  This will be described more specifically with reference to FIG. FIG. 4A is a diagram for explaining the operating conditions of the welding pattern 10 of Example 1 in the pleated screen according to one embodiment of the present invention, and FIGS. 4B and 4C are comparative examples. It is a figure explaining the welding patterns 10a and 10b of Examples 1 and 2. FIG.

  First, referring to FIG. 4A, in the welding pattern 10 of the first embodiment, a linear welded portion that is substantially perpendicular to the longitudinal direction of the screen 7 is defined as a unit welding pattern P1 in the longitudinal direction of the screen 7. The dough is continuously welded. Thus, unit welding patterns P2 and P3 having the same shape as the unit welding pattern P1 are sequentially formed, and the welding pattern 10 of the first embodiment is configured.

  At this time, in the unit welding pattern P1 of Example 1, the welding width d in the processing direction is equal to or less than the predetermined value D, and satisfies the shrinkage resistance (condition A). Further, the unit welding pattern P1 has a welding area of a predetermined value S or more and satisfies the welding strength (condition B). The predetermined value D and the predetermined value S may take different values depending on the cloth to be welded, but are values that are uniformly determined depending on the cloth to be welded. By continuously welding the fabric with the unit welding pattern P1 satisfying such conditions A and B, it is possible to prevent the fabric from bending and to prevent the welded portion from peeling off. The pitches of the unit welding patterns P1, P2, P3, etc. that are sequentially formed can be varied depending on the fabric, but as long as the conditions A and B are satisfied, the fixed pitch common to many fabrics is fixed. It can also be a pitch.

  On the other hand, referring to FIG. 4B, the unit welding pattern P1 of Comparative Example 1 has a welding area of a predetermined value S or more and satisfies the welding strength (condition B). The width d exceeds the predetermined value D and does not satisfy the shrinkage resistance (condition A).

  Further, referring to FIG. 4C, the unit welding pattern P1 of Comparative Example 2 has a welding width d in the processing direction that is equal to or smaller than a predetermined value D, and satisfies the shrinkage resistance (condition A). The welding area becomes less than the predetermined value S and does not satisfy the welding strength (condition B).

  When defined in terms of the shape of the unit welding pattern P1, the unit welding pattern P1 of the first embodiment has both regions PE1, 1 divided by the boundary with the processing direction passing through the center O as a boundary. PE2 is formed to have a welded portion that satisfies conditions A and B as a whole.

  From the viewpoint of the shape of the unit welding pattern P1, a modified example of the unit welding pattern P1 of Example 1 will be described with reference to FIG. FIGS. 5A to 5H are explanatory diagrams of welding patterns of another example of the pleated screen according to the embodiment of the present invention.

  In Modification 1 shown in FIG. 5A, a broken-line welded portion that is substantially perpendicular to the longitudinal direction of the screen 7 is configured as a unit weld pattern P1.

  In the second modification shown in FIG. 5B, a linear weld portion inclined at a predetermined angle with respect to the longitudinal direction of the screen 7 is configured as a unit weld pattern P1.

  Modified example 3 shown in FIG. 5 (c) is a further modified example of modified example 2, and a broken-line welding portion inclined at a predetermined angle with respect to the longitudinal direction of the screen 7 is configured as a unit welding pattern P1. The

  The modified example 4 shown in FIG. 5D is configured as a unit welding pattern P <b> 1 having substantially dot-shaped welding portions dispersed in a predetermined arrangement with respect to the longitudinal direction of the screen 7.

  A modified example 5 shown in FIG. 5 (e) is a further modified example of the modified example 2, and has a substantially square shape having a plurality of linear welded portions inclined at a predetermined angle with respect to the longitudinal direction of the screen 7. The unit welding pattern P1 is configured.

  A modified example 5 shown in FIG. 5 (f) is a further modified example of the modified example 2 and has a substantially X shape having a number of linear welded portions inclined at a predetermined angle with respect to the longitudinal direction of the screen 7. The unit welding pattern P1 is configured.

  Modification 5 shown in FIG. 5G is an example in which the unit welding pattern P1 is configured by a graphic pattern surrounded by three or more line segments.

  The modified example 5 shown in FIG. 5 (h) is an example in which the unit welding pattern P1 is constituted by a graphic pattern surrounded by one or more curved lines.

  In addition to these, various forms are assumed as modified examples of the unit welding pattern P1 of the first embodiment. In summary, the conditions A and B are satisfied as a whole, that is, a welding portion parallel to the processing direction is configured. As long as the welding width d of all the welded portions is a predetermined value D or less and the welded area of the entire welded portion of the unit weld pattern P1 is a predetermined value S or more, one or more dots, one or more line segments, and It can be configured to include one or more of one or more curves. Then, with the processing direction passing through the center O of the unit welding pattern P1 as a boundary, both regions PE1 and PE2 divided by the boundary are formed so as to have a welding portion that satisfies the conditions A and B as a whole. Therefore, if it is the unit welding pattern P1 in which the welding part which satisfy | fills conditions A and B as a whole exists, it can be set as the welding pattern of various shapes.

  However, the above-described conditions A and B can be reliably satisfied by using the welding pattern 10 constituted by the welding portion substantially perpendicular to the processing direction as in the unit welding pattern P1 of the first embodiment. Is more preferable.

  The present invention has been described above with reference to specific embodiments. However, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the technical concept thereof. For example, in the above-described example, a pleated screen having one screen 7 is illustrated, but a form in which a plurality of screens are connected via an intermediate rail, or a two-row arrangement screen as shown in FIG. A screen to which the welding technique according to the present invention is applied can also be used for a pleated screen having a honeycomb arrangement as shown in FIG. 6B.

  According to the present invention, it is possible to configure a pleated screen having a screen formed in such a manner that warpage hardly occurs as a whole even if it is a fabric having heat shrinkability. Therefore, a screen that can be bent in a zigzag shape is provided. Useful for pleated screen applications.

7 Screen 7b Joining piece 10 Welding pattern of Example 1 10a Welding pattern of Comparative Example 1 10b Welding pattern of Comparative Example 2

Claims (6)

A pleated screen having a screen that can be bent in a zigzag shape,
A pleat comprising a screen formed by continuously welding a cloth in one direction with a predetermined unit welding pattern, wherein the unit welding pattern has a shape satisfying predetermined shrinkage resistance and welding strength. screen.   The unit welding pattern has a shape in which a welded portion that satisfies the predetermined shrinkage resistance and welding strength as a whole exists in both regions divided by the boundary with the one direction passing through the center as a boundary. The pleated screen according to claim 1, wherein:   The pleat according to claim 1 or 2, wherein the unit welding pattern includes at least one of one or more dots, one or more line segments, and one or more curve segments. screen.   In the welded portion constituting the unit weld pattern, the weld width of all welded portions constituting the welded portion parallel to the one direction is not more than a predetermined value, and the weld area of the entire welded portion of the unit weld pattern is predetermined. The pleated screen according to any one of claims 1 to 3, wherein the pleat screen is configured to be equal to or greater than a value.   The pleated screen according to any one of claims 1 to 4, wherein the unit welding pattern has a welding portion inclined at a predetermined angle with respect to the one direction.   The pleated screen according to any one of claims 1 to 5, wherein the unit welding pattern includes a welding portion substantially perpendicular to the one direction.