JP2006138103A - Blind - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To have a guide means for changing direction of a lifting code and suspend the lifting cord along a shielding material by a guide means in a different position in width direction of a blind relative to a winding drum and prevent height dimension of a head box including the guide means from being enlarged and prevent operation load from being excessive. <P>SOLUTION: The guide means comprises a first guide pulley 32 and a second guide pulley 34. The first guide pulley 32 is positioned in the vicinity of the winding drum 18, the second guide pulley 34 is positioned near an end part of the head box 12. The first guide pulley 32 and the second guide pulley 34 are both positioned approximately at the same height above the winding drum 18. The lifting cord 28 becomes horizontal by change in direction of about 90 °from the winding direction of the winding drum 18 through the first guide pulley 32. The lifting cord 28 becomes vertical by change in direction of about 90°from the horizontal direction through the second guide pulley 34 and is suspended in an end part in the width direction of the blind. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  According to the present invention, a winding drum is rotatably disposed in a head box, and one end of a lifting / lowering cord that lifts and lowers a shielding material is connected to the winding drum so as to be wound and unwound. Thus, the take-up drum is related to a blind that hangs down along the shielding member at a position different from the take-up drum in the blind width direction.

  Conventionally, what was described in patent document 1 is known as this kind of blind. According to this patent document 1, a winding drum is disposed in a head box, and one end of a lifting / lowering cord that lifts and lowers a slat as a shielding material is connected so as to be wound and unwound. Guide rails are arranged on both sides of the blind, and guided members are provided at both ends of each slat along the guide rails. The other end of the lifting / lowering cord is changed in direction from the take-up drum, is vertically suspended along a guide rail at a position different from the take-up drum in the blind width direction, and the other end is connected to the end of the lower plate. The

  For this reason, the lifting cord is suspended vertically from the take-up drum, and then is horizontally changed by a guide pulley attached to the lower portion of the head box and extends in the width direction of the blind. It is vertically converted by another guide pulley provided near the upper end and extends vertically along the guide rail.

Japanese Utility Model Publication No. 58-86897

  However, in the conventional blind described above, the guide pulley is attached to the lower part of the head box and protrudes downward from the main body of the head box, so that the overall height of the head box including the guide pulley is increased. There is.

  In general, a guide member such as a guide pulley is used to change the direction of the lifting / lowering cord, but in order to reduce the resistance with the guide member, the bending of the lifting / lowering cord is not increased, in other words, the direction changing It is desirable that the angle is 90 degrees or more so that the angle does not become an acute angle. Under this condition, when one guide member is arranged below the main body of the head box, the other guide members arranged on the left and right sides of the head box must be arranged so as to be shifted below the one guide member. However, as a result, there is a problem that the height of the entire head box including the guide member is increased.

  In order to avoid such a problem, it is conceivable to reduce the size of the guide member itself, but if it is so reduced, there is a problem that the resistance received by the lifting / lowering cord from the guide member increases and the operation load increases. .

  The present invention has been made in view of such a problem, and in a blind having guide means for changing the direction of the lifting / lowering cord, the head box including the guide means is prevented from being enlarged and the operation load is excessively increased. The aim is to provide a blind that can be prevented.

  In order to achieve the above-mentioned object, the invention according to claim 1 is characterized in that a winding drum is rotatably disposed in a head box, and one end of a lifting / lowering cord for lifting and lowering a shielding material is wound on the winding drum. In the blind that is connected so as to be unwound and the lifting / lowering cord is suspended along the shielding material at a position different from the winding drum by the guide means in the blind width direction, the guide means comprises a plurality of guide members, One guide member is provided above the winding drum.

  According to a second aspect of the present invention, the guide means according to the first aspect includes: a first guide member disposed above the winding drum; and a second guide member disposed near the end of the head box. It is characterized by being configured.

  According to a third aspect of the present invention, each of the first guide member and the second guide member according to the second aspect comprises a circular pulley, and the outer diameter of the second guide member is larger than the outer diameter of the first guide member. It is characterized by that.

  According to the present invention, by providing at least one guide member above the winding drum, the direction of the lifting / lowering cord can be provided even if another guide member is provided at the same height as or below the one guide member. The angle of conversion is not reduced, and the length in the vertical direction required by the guide member can be suppressed, and an increase in the height of the head box can be prevented. Further, by increasing the size of the guide member corresponding to the saving of the height of the head box, it is possible to prevent an excessive operation load.

  Since the guide member is provided in the upper part of the head box having a relatively large space, the space can be effectively used. Furthermore, it becomes possible to perform the work of arranging the lifting / lowering cords from above the head box, and the workability can be improved.

  According to the second aspect of the present invention, since the second guide member is provided in a portion having a relatively large space at the end of the head box, the space can be effectively used.

  According to the invention described in claim 3, since the outer diameter of the second guide member can be increased, the operation load can be reduced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is an overall view of a blind according to a first embodiment of the present invention. In the figure, a blind 10 is disposed in a window opening or in a multilayer glass, and has a head box 12 and a slat 14 as a shielding material supported by the head box 12.

  Inside the head box 12, a winding drum 18, a shaft 20 that can transmit rotation to the winding drum 18, and a pulley 22 that is driving means that can transmit rotation to the shaft 20 are disposed. An operation cord 24, which is an operation means, is wound around the pulley 22, and the operation cord 24 is suspended downward from the head box 12. The rotation of the operation cord 24 is transmitted to the winding drum 18 through the pulley 22 and the shaft 20. The operation means may be a means by either manual operation or electric operation, and a configuration other than the pulley and the operation cord is also possible.

  One end of a ladder cord 26 that supports the slats 14 aligned in the vertical direction is connected to the winding drum 18 so as to be integrally rotatable within a predetermined angle range, and a lifting cord 28 that moves the slats 14 up and down. One end of each is connected so as to be wound and unwound.

  The ladder cord 26 and the lifting / lowering cord 28 are suspended from the head box 12, respectively. The ladder cord 26 extends directly from the winding drum 18 in the head box 12 in the vertical direction, and the other end is connected to a bottom rail 30 disposed below the slat 14. On the other hand, the lifting / lowering cord 28 changes its direction from the winding drum 18 to about 90 degrees with respect to the winding direction of the winding drum 18, extends in the horizontal direction, and then changes its direction to about 90 degrees again. Then, it extends in the vertical direction, passes through a lifting / lowering cord insertion hole formed at the end of the slat 14, and the other end is connected to the bottom rail 30. The elevating cord insertion holes formed in the end portions of the slats 14 are not visible from the outside by guides (not shown) provided at both end portions of the blind 10, so that the elevating cord insertion portions other than the end portions of the slats 14 are thereby made. Light leakage in the fully closed state of the slat 14 that occurs when the through hole is formed is prevented.

  In order to change the direction of the elevating cord 28 as described above, as shown in FIG. 2, in the head box 12, a first guide pulley (first guide member) 32 and a second guide pulley (second guide) as guide members are provided. Guide member) 34 is provided, and these guide pulleys 32, 34 constitute guide means. Both the first guide pulley 32 and the second guide pulley 34 are provided above the take-up drum 18 and are rotatably supported by the head box 12 or a member coupled to the head box 12. Here, “above the winding drum 18” means that the upper end of the guide pulley is positioned above the upper end of the winding drum 18. The first guide pulley 32 is disposed near the winding drum 18, and the second guide pulley 34 is disposed near the end of the head box 12. In this example, the first guide pulley 32 and the second guide pulley 34 have substantially the same diameter.

  Due to the first guide pulley 32, the lifting / lowering cord 28 is turned approximately 90 degrees from the winding direction of the winding drum 18 to become a horizontal direction, and by the second guide pulley 34, the lifting / lowering cord 28 is moved approximately 90 from the horizontal direction. The direction is changed to a vertical direction and is derived from the head box 12. Since each direction change angle in the 1st guide pulley 32 and the 2nd guide pulley 34 is 90 degrees, the frictional force between the raising / lowering cord 28 does not become large.

  In the case of having the guide means configured as described above, the minimum height H of the head box 12 including the guide means (excluding dimensions determined by other members) is the diameter of the winding drum 18 as D. When the diameters of the first and second guide pulleys 32 and 34 are d, H = D + d + α. α is a dimension from the upper end of the take-up drum 18 to the lower ends of the guide pulleys 32 and 34. When the upward direction is positive, any value can be taken and set appropriately. The value that can be done.

  On the other hand, as shown in FIG. 4, in the case of basically the same configuration as the conventional patent document 1, the minimum height H ′ of the head box (excluding dimensions determined by other configuration requirements) is H ′ = D + 2d + α.

  From the above, under the condition that α is the same, the height dimension of the head box is reliably increased by a length corresponding to the diameter of one guide pulley in the present embodiment compared to the conventional configuration. It can be seen that can be reduced. Thus, the height dimension of the head box can be reduced by the configuration of the present embodiment.

  Or, optionally, instead of reducing the height of the headbox, the guide pulley to be used is made larger than the conventional configuration, and the headbox is kept at the same height as before. The load can be reduced.

  Further, since the guide pulleys 32 and 34 are provided on the upper portion of the head box 12 having a relatively large space, the space can be effectively used as compared with the conventional configuration.

  Further, when the assembling work of the lifting / lowering cord 28 is performed at the time of assembly, since it can be performed from above the head box 12, the lower portion of the head box 12 in which the slats 14 are disposed below as in the conventional configuration. Compared with the arrangement of the work, workability is improved.

  FIG. 3 is a view corresponding to FIG. 2 showing a main part of the second embodiment of the present invention. The other parts are basically the same as those shown in FIG.

  In this example, the first guide pulley 32 is the same as in the first embodiment, but the outer diameter of the second guide pulley 36 is larger than that of the first guide pulley 32.

  Since the shaft 20 or the like does not exist at the end of the head box 12 where the second guide pulley 36 is disposed and the empty space is large, the outer diameter of the second guide pulley 36 can be increased. However, the upper end of the second guide pulley 36 is positioned at substantially the same height as the upper end of the first guide pulley 32. Therefore, the second guide pulley 36 is independent of the position of the fulcrum of the second guide pulley 36. Is provided above the winding drum 18.

  Even in this configuration, since the second guide pulley 36 uses the empty space that originally exists at the end of the head box 12, the second guide pulley 36 affects the height dimension of the head box 12. The outer diameter of the first guide pulley 32 affects the height dimension of the head box 12 as in the first embodiment. Therefore, if the outer diameter of the first guide pulley 32 is approximately the same as that of the first embodiment, the height dimension of the head box 12 can be reduced. Alternatively, instead of reducing the height dimension of the head box, the outer diameter of the first guide pulley 32 is made larger than that of the conventional configuration, and the height dimension of the head box is maintained at the same level as the conventional one. The operation load can be reduced.

  Since the outer diameter of the second guide pulley 36 is large, the curvature of the elevating cord 28 whose direction is changed by the second guide pulley 36 is reduced, and the operation load can be reduced.

  In the above embodiment, two guide pulleys are provided, both guide pulleys are provided above the take-up drum, and the lifting cord is turned 90 degrees by each guide pulley. However, the present invention is not limited to this, and only one guide pulley may be provided above the take-up drum, and the remaining one or more guide pulleys may be provided below the take-up drum. Moreover, the angle of the direction change of the lifting / lowering cord performed by each guide pulley is not limited to 90 degrees, and may be an angle larger than 90 degrees. Further, one guide pulley need not be directly above the unwinding position of the winding drum 18.

  Further, the direction change of the lifting / lowering cord 28 using the guide means is not limited to the purpose of preventing such light leakage, and even when the direction of the lifting / lowering cord 28 is changed for any other purpose. Similarly, the guide means of the present invention can be applied.

It is the whole blind front view by a 1st embodiment of the present invention, and is a figure showing the internal structure of a head box for explanation. It is a principal part figure showing the structure inside the head box of the blind of FIG. FIG. 3 is a view corresponding to FIG. 2 of a blind according to a second embodiment of the present invention. It is a figure equivalent to FIG. 2 of the blind by a conventional structure.

Explanation of symbols

10 Blind 12 Head box 14 Slat (shielding material)
18 Winding drum 28 Lifting cord 32 First guide pulley (guide member)
34, 36 Second guide pulley (guide member)

Claims (3)

A winding drum (18) is rotatably arranged in the head box (12), and one end of a lifting / lowering cord (28) for lifting and lowering the shielding material (14) on the winding drum (18) is wound and wound. In a blind that is releasably connected and the lifting / lowering cord (28) is suspended along the shield (14) by a guide means at a position different from the winding drum in the blind width direction,
The blind is characterized in that the guide means comprises a plurality of guide members (32, 34, 36), and at least one guide member is provided above the winding drum (18).   The guide means includes a first guide member (32) disposed above the winding drum (18) and a second guide member (34, 36) disposed near the end of the head box. The blind according to claim 1.   The first guide member (32) and the second guide member (36) are each formed of a circular pulley, and the outer diameter of the second guide member (36) is larger than the outer diameter of the first guide member (32). The blind according to claim 2.

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