JP2008267115A - Blind - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blind having a simple structure for coping with a weight increase in the blind, and also to provide a blind capable of easily adjusting its height in manufacture or after manufacture. <P>SOLUTION: This blind B has a slat 6, a lifting device 11 of the slat, and a shaft 13 for a lift cord connected to the lifting device 11. The lifting device 11 of the slat has a dead weight falling preventive mechanism of the slat having a pulley 122, a clutch shaft 113 and a clutch spring 114 rotatingly driven by a loop cord 3 in series in this order, and a planetary gear mechanism C2 rotating in response to rotation of the pulley 112 and functioning as a load reducing means when lifting the slat, in series in this order, and is constituted for lifting the slat 6 by rotating the shaft 13 for the lift cord via the lifting device by rotational driving of the pulley 112. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a blind.

  The horizontal blind that blocks sunlight from entering the room is equipped with a pulley case that houses a pulley on the front of the head box, and the pulley is rotatably supported in this pulley case and an operation cord (loop cord) is attached to the pulley. The slat is moved up and down and the angle is adjusted through a slat drive device disposed in the head box by operating the operation cord and rotating the pulley. In this case, the slat drive device is provided with a self-weight drop prevention device for preventing the slat from dropping its own weight, and the pulley case is operated by operating the operation cord to cancel the operation of the self-weight drop prevention device and blinds are provided. There is known one provided with a release device that lowers at a stroke (for example, see Patent Document 1).

Japanese Patent Laid-Open No. 5-302482 (Claim 1, and FIGS. 1, 5 and 6 etc.)

  By the way, in recent years, wooden horizontal blinds using wooden slats and synthetic resin horizontal blinds using synthetic resin slats have attracted attention. However, these horizontal blinds can be moved up and down freely using heavy wooden slats and synthetic resin slats that have been used for conventional aluminum light slats. There is a problem that it cannot be performed and it cannot cope with the weight increase of the blinds. In addition, since the slat drive device has a pulley case on the front surface of the head box, there is a problem in that the configuration for transmitting the rotation drive of the pulley to the shaft in the head box is complicated, and the design is inferior. There is also.

  Furthermore, the height of the blind (finished height) depends on the overall length of the lift cord and ladder cord, but when the blind is manufactured, the length of the lift cord and ladder cord is determined and each cord is placed at a predetermined position. Since it cuts, there was also a problem that the height of the completed blind could not be adjusted.

  Accordingly, an object of the present invention is to solve the above-mentioned problems of the prior art, and to provide a blind that can cope with an increase in the weight of the blind and has a simple configuration. Furthermore, it is providing the blind which can adjust the height even at the time of manufacture or after manufacture.

  A blind according to the present invention includes a slat, a lifting device for the slat, and a shaft for a lift cord connected to the lifting device, the lifting device for the slat being rotated by an operation cord, a pulley, a clutch shaft, and a clutch spring Are provided in series in this order, and a planetary gear mechanism that is rotated in accordance with the rotation of the pulley and functions as a weight reducing means when raising and lowering the slat is provided in series in this order. It is characterized in that the shaft for the lift cord is rotated through a lifting device by rotational driving, and the slat is moved up and down.

  The blind according to the present invention can be applied to a heavy-duty large blind by being provided with a weight reducing means for raising and lowering the slats.

  In this case, it is preferable that adjustment means for adjusting the length of the lift cord and the length of the ladder cord supporting the slat is provided. In the conventional blind, since the extra lift cord and ladder cord are cut at the time of production, the entire length of the lift cord and ladder cord cannot be freely changed after production. By providing the adjusting means, it is possible to adjust the entire lengths of the lift cord and the ladder cord even after manufacturing. The adjustment means is provided on the bottom rail located under the lowermost slat, and includes a member for winding the lift cord, a hole portion for inserting and fixing the member, and a groove portion for arranging the ladder cord. It is preferable to consist of a member. The adjusting means of the present invention has a very simple configuration of a member for winding the lift cord and a fixing portion having a hole for inserting and fixing the member, but the length of the lift cord attached to the member is long. The height of the blind that could not be changed after manufacturing can be easily changed by adjusting the length of the ladder cord arranged in the groove.

  The fixing member includes a bottom member and a convex member formed on the bottom member, and the hole portion penetrates the bottom member and the convex member, and the surface of the bottom member on the convex member side is provided. A groove is provided, and the side surface of the convex member corresponding to the groove is preferably flat.

  In the blind according to the present invention, the elevating device for the slat and the shaft for the lift cord are housed in series in a head box provided in the upper portion of the slat, and the operation cord hung on the pulley is connected to the end of the head box. It is preferable to be configured to be suspended from an opening provided in the portion. All the components necessary for raising and lowering the slats are accommodated in the head box, and the operation cord is suspended from the opening of the head box, so that a pulley case becomes unnecessary. The shaft for the lift cord is connected to the lifting device at one end and connected to the feed screw fixed to the end of the head box at the other end, and driven by rotation of the pulley. When the shaft for the lift cord is rotated via the lifting device, the shaft for the lift cord moves according to the pitch of the feed screw, and the lift cords are wound around the shaft without overlapping each other so that the slats are lifted and lowered. Preferably, it is configured. In the blind of the present invention, a shaft for a lift cord is fitted and connected to a fixed feed screw, and when the shaft is rotated, the lift cord is wound around the shaft without overlapping each other. Thus, the lift cord can be prevented from being entangled and the slat can be moved up and down horizontally. The pulley includes a groove portion for hooking an operation cord, and rising portions on both sides of the groove portion have a gear shape, and a tooth portion of one rising portion and a tooth portion of the other rising portion are mutually It is preferable that an inclined protrusion is provided on at least a part of the inner surface of each tooth portion.

  The planetary gear mechanism is configured such that a gear ratio can be changed according to a required pulling force of an operation cord or a weight of all slats, or according to the pulling force and the weight of all slats. . Thereby, a pulling force can be made low or can be made high. Therefore, regardless of the operation load, even an operator with a weak force can easily operate the blind, and even an operator with a strong force can operate without considering the adjustment of the force.

  The blind according to the present invention has an excellent effect of being able to cope with an increase in size and weight of the blind by a simple configuration, and also has an excellent effect that the height of the blind can be adjusted.

  FIG. 1 is a perspective view for explaining the structure of a blind which is an embodiment of a horizontal blind according to the present invention. The blind B of the present invention includes an upper head portion B1 and a lower blind portion B2. The head part B1 includes an elevating mechanism 1 for elevating the slats, a head box 2 for accommodating the elevating mechanism 1, and an operation code 3 such as a loop cord or an elevating operation code for driving the elevating mechanism 1. Prepare. An opening is provided at the bottom of the head box 2, and a plurality of lift cords 4 and ladder cords 5 (two sets as an example in the figure) hang from the lifting mechanism 1 to the blind portion B2 through the opening. Has been. That is, the blind according to the present invention does not require a plurality of gear mechanisms for transmitting the rotational drive of the pulley to the lifting mechanism 1 because the pulley case is not provided on the front surface of the head box 2 unlike the conventional blind. The conventional plurality of gear mechanisms are not arranged in series. Therefore, the blind of the present invention has a simple configuration in which all the members constituting the lifting mechanism 1 are arranged in series and housed in the head box 2, and does not have a pulley case. It is also excellent. The operation cord is not particularly limited as long as the intended purpose such as raising and lowering and tilting can be achieved, and examples thereof include an unbroken ring-shaped string or a ball chain made of plastic, iron, or stainless steel.

  The blind part B <b> 2 includes a plurality of slats 6 and a bottom rail 7 below the lowermost slat 6. Each slat 6 is provided with a hole 61 through which each lift cord 4 suspended from the lifting mechanism 1 is passed. Each slat 6 is supported by a stage cord 52 connected between the two support cords 51 of the ladder cord 5. The bottom rail 7 is provided with a hole 71 at a position corresponding to the hole 61 of the slat 6 so that each lift cord 4 can pass through the hole 71. The bottom rail 7 is provided with a cord fixing means that also functions as an adjusting means for adjusting the lengths of the lift cord 4 and the ladder cord 5, and the lift cord 4 and the ladder cord 5 are fixed to the cord. It can be fixed at the bottom of the bottom rail 7 by means. In the horizontal blind of the present invention, the slat 6 is lifted and lowered by changing the length L of the suspended lift cord via the lifting mechanism 1.

  The slat 6 may be, for example, a slat made of wood or synthetic resin in which one slat is heavier than a light slat usually made of aluminum or the like for blinds. Examples of the synthetic resin include styrene resin and glass fiber reinforced plastic (FRP).

  The lifting mechanism 1 of the head part B1 will be described in detail with reference to FIG. 2 which is an enlarged perspective view of the head part B1 and FIG. 3 which is an exploded perspective view of the lifting mechanism 1. 2 and 3, the same components as those in FIG. 1 are denoted by the same reference numerals. According to FIG. 2, the lifting mechanism 1 of the head part B1 is fixed to the head box side wall 21a and is driven by a loop cord 3, and a square shaft (preferably a square shaft) connected to the lifting apparatus 11. ) 12, a shaft 13 connected to the square shaft 12 and supported by a frame 22 fixed to the bottom of the head box 2, and connected to an end of the shaft 13 opposite to the lifting device 11; And a feed screw 14 fixed to the head box side wall 21b.

  On the outer periphery of the shaft 13, latching means 15 for the ladder cord 5 is provided. The latching means 15 includes, for example, a torsion coil spring 151 provided on a torsion coil spring base. Each end 151a and 151b of the torsion coil spring 151 is formed in an annular shape as shown in FIG. 3, and is configured so that one end of each support cord 51 of the ladder cord 5 can be hooked at each end. Yes. The support cord 51 passes through the through hole for the ladder cord that penetrates the frame body 22 and the bottom of the head box 2, and passes from the head box 2 to the blind portion B2.

  A clip 16 is provided on the outer periphery of the shaft 13, and one end of the lift cord 4 is fixed by the clip 16. The remaining portion of the lift cord 4 is wound around the shaft 13 and then passes through a lift cord through-hole penetrating the frame 22 and the bottom of the head box 2, and from the head box 2 to the blind portion B2. Pass through the hole 61 of the slat 6 after that.

  Hereinafter, the lifting mechanism 1 will be described in detail with reference to FIG. 3, which is an exploded perspective view of the lifting mechanism 1. The shaft 13 includes a cylindrical central member, a cylindrical member 132 having a square hole 131, and a member 134 having a nut structure 133 therein, and the member 132 and the member 134 are provided at each end of the central member. Are configured to be fitted. Since the square hole 131 and the square shaft 12 are arranged so as to fit with each other, the shaft 13 into which the member 132 is fitted rotates integrally with the square shaft 12.

  In order to rotatably support the shaft 13, the frame body 22 includes a shaft roller 221. The frame body 22 will be described with reference to FIGS. 4, (a) is a top view of the frame body 22, (b) is a side view from the X direction in FIG. 4 (a) when the frame body 22 is installed in the head box 2, and (c) is a frame. FIG. 5 is a side view from the Y direction in FIG. 4A when the body 22 is installed in the head box 2, and the same components as those in FIGS.

  4B and 4C, the frame body 22 includes a shaft frame body 222 and a lift cord frame body 223 each having an arcuate concave upper surface. And as shown to Fig.4 (a), it is desirable that the frame 22 is integrally molded so that these frames may be connected by the board 224 at the bottom part.

  The shaft frame 222 is configured to be able to rotatably support the shaft 13 by a plurality of shaft rollers 221 (three as an example in the figure) (see (b)). The lift code frame 223 is provided with a lift code through hole 225, and the lift code 4 is suspended from the shaft 13 through the lift code through hole 225 to the head box 2. In this case, a lift cord roller 226 is provided on the upper surface of the lift cord frame 223, and the lift cord roller 226 opens a predetermined interval (the diameter of the lift cord) so as to open the lift cord. It arrange | positions at the upper part of the through-hole 225 for use.

  The plate 224 is provided with a ladder cord through hole 227, and the column cord 51 of the ladder cord 5 fixed to the shaft 13 can be suspended from the head box 2 to the blind portion B2 through the hole. . Further, the plate 224 is configured such that the partition plate 228 shown in FIG. 3 can be installed, and the lift cord 4 and the ladder cord 5 are not entangled by the partition plate 228.

  Further, the plate 224 is provided with a member 229. When the torsion coil spring 151 provided on the shaft 13 rotates, the end portions 151a and 151b come into contact with the member 229, and the torsion coil spring 151 The rotation is configured to stop.

  Referring to FIG. 3, the nut structure 133 is built in one member 134 of the shaft 13 rotatably supported by the frame body 22, and the nut structure 133 is mounted on the head box side wall 21b. It is configured to be fitted with a fixed feed screw 14. Therefore, when the shaft 13 rotates, the nut structure 133 and the feed screw 14 are fitted, but since the feed screw 14 is fixed to the head box side wall 21b, only the shaft 13 rotates to match the pitch of the feed screw. Move. Since the pitch of the feed screw is configured to match the lift cord diameter, the lift cord 4 can be wound around the shaft 13 without overlapping each other.

  That is, in the blind B of the present invention, the square shaft 12 is rotated by operating the loop cord 3 to drive the lifting device 11. Then, by rotating the shaft 13 in conjunction with the rotation of the square shaft 12 and moving the shaft 13 according to the pitch of the feed screw, the lift cords 4 are wound around the shaft 13 without overlapping each other, and as a result The slat 6 can be moved up and down by changing the length L of the lift cord.

  In this case, since the latching means 15 is fitted into the shaft 13 by the torsion coil spring 151 having a reduced diameter, the latching means 15 rotates as the shaft 13 rotates. When the latching means 15 rotates and the end portion 151a or 151b of the torsion coil spring 151 hits the member 229, the torsion coil spring 151 expands in diameter. At this time, the latching means 15 is interlocked with the rotation of the shaft 13. Only the shaft 13 rotates. As described above, when the torsion coil spring 151 rotates with the rotation of the shaft 13, one of the support cords 51 of the ladder cord 5 connected to the ends 151a and 151b of the torsion coil spring is moved upward. Since the other is moved downward by being lifted, the angle between the floor cord 52 provided between the support cords 51 and the floor changes. Since the angle of the slat 6 supported by the stage code 52 is changed by changing the angle of the stage code 52, for example, it is possible to change the light amount of the blind by changing the angle of the slat. Unlike the lift cord 4, the ladder cord 5 does not wrap around the shaft 13 because the torsion coil spring 151 contacts the member 229 and expands in diameter.

  Hereinafter, the lifting device 11 will be described with reference to an exploded perspective view of the lifting device 11 shown in FIG. The lifting device 11 includes a clutch mechanism C1 and a planetary gear mechanism C2. The clutch mechanism C1 and the planetary gear mechanism C2 are housed in a lifting device case 111. The clutch mechanism C1 is attached to the head box side wall 21a, and the planetary gear mechanism C2 is attached so as to communicate with the clutch mechanism C1.

  The clutch mechanism C1 includes a pulley 112 attached to the head box side wall 21a, a clutch shaft 113 that also functions as a means for preventing the slat from falling by its own weight, and a clutch spring 114 in this order from the head box side wall 21a side. ing.

  The planetary gear mechanism C2 is a weighted damping means for raising and lowering the slats. That is, the planetary gear mechanism C2 is disposed around the gear portion of the center gear 115 and the center gear 115, and rotates the planet gear 116 and the planet gear 116 fitted to the gear portion. A pedestal (carrier) 117 for supporting it, an outer gear 118 fitted on the outer periphery of the planet gear 116, and a spacer 119 are provided in this order. The center gear 115 and the clutch shaft 113 of the clutch mechanism C1 are fitted, and the clutch mechanism C1 and the planetary gear mechanism C2 communicate with each other. The planetary gear mechanism C2 is fixed to the lifting device case 111 using a fixing tool F such as a screw by a cover 111a provided on the spacer 119 side.

  A fixing member 1112 having a cylindrical projection 1111 for fixing the clutch spring 114 is provided in the lifting device case 111. The fixing member 1112 is provided with a hole corresponding to the inner diameter of the protruding portion 1111, and the clutch shaft 113 of the clutch mechanism C1 and the center gear 115 of the planetary gear mechanism C2 are fitted and communicated with each other through the hole.

  Further, two loop cord rollers 1113 for guiding the loop cord 3 to be applied to the pulley 112 are also provided so as to be separated from each other by the thickness of the loop cord 3, and a guide is provided between the two loop cord rollers 1113. The loop cord thus formed is suspended outside the head box as shown in FIG. 1 through an opening 1114 provided at a position corresponding to the pulley 112 at the end of the head box. Although not shown in FIG. 5, a washer (clutch washer) may be disposed between the center gear 115 and the fixing member 1112.

  Hereinafter, each component will be described. On the clutch shaft 113 side of the pulley 112, two arc-shaped engagement pieces 1121 formed integrally with the pulley 112 are provided facing each other with a predetermined interval. The pulley 112 is provided with a protrusion on at least a part of the inner surface of the rising portions 1122a and 1122b of the groove portion on which the loop cord 3 is hung so that the cord can be prevented from slipping when the loop cord 3 is hung. The protrusions are preferably provided so as not to face each other. In order to prevent warpage, the rising portions 1122a and 1122b of the groove portion may have a gear shape. Preferably, the tooth portions of each of the rising portions 1122a and 1122b are formed so as not to face each other, and an inclined protrusion that is inclined downward is formed at the center of the inner surface of each tooth portion. It is formed.

  The clutch shaft 113 includes a convex portion 1131 having a square shape (for example, a hexagonal shape) for connecting to the center gear 115 through the inside of the projection portion 1111 and the hole of the fixing member 1112, and one or more engagement pieces 1132 (in the drawing). Then, there are two examples). The clutch spring 114 is dimensioned so as to be firmly fixed to the outer periphery of the protrusion 1111. The ends 114a and 114b of the clutch spring 114 have a predetermined interval, and the ends are bent. Then, the engagement piece 1121 of the pulley 112 can be engaged with the outer periphery having the longer interval between the end portions 114a and 114b, and the engagement of the clutch shaft 113 with the outer periphery having the shorter interval between the end portions 114a and 114b. It is comprised so that the piece 1132 can engage.

  The clutch mechanism C1 will be described with reference to FIG. FIG. 6 is a schematic view when the clutch shaft 113 is viewed from the pulley 112 side (however, the pulley is not shown except the engaging piece 1121), and the same reference numerals are given to the same components as those in FIG. .

  The clutch shaft 113 is arranged so that one engagement piece 1132 can be engaged with the outer peripheral portion having the shorter interval between the end portions 114 a and 114 b of the clutch spring 114 fitted into the protrusion 1111. The pulley 112 is arranged so that the engagement piece 1121 can be engaged with the longer outer peripheral portion between the end portions 114 a and 114 b of the clutch spring 114. With such an arrangement, when the pulley 112 is rotated by the loop cord 3, the engagement piece 1121 hits either the end 114a or the end 114b in accordance with the rotation direction, the diameter of the clutch spring 114 is expanded, and the clutch spring 114 and the protrusion The frictional force with the part 1111 is reduced. As a result, the clutch spring 114 can be rotated. With this rotation, the engagement piece 1121 rotates and the clutch shaft 113 rotates. As the clutch shaft 113 rotates, the convex portion 1131 integrated with the clutch shaft also rotates. Since the convex portion 1131 is fitted into the hexagonal concave portion 1151 of the center gear 115 through the inside of the protruding portion 1111 and the hole of the fixing member 1112, the center gear 115 rotates as the clutch shaft 113 rotates. .

  Hereinafter, how the shaft 13 is rotated by the rotation of the center gear 115 will be described. Referring to FIG. 5, since the center gear 115 and the three planet gears 116 disposed on the outer periphery of the gear portion of the center gear 115 are fitted, each planet gear 116 rotates due to the rotation of the center gear 115. While rotating around the center gear (revolution). The pedestal 117 itself that rotatably supports the planet gear 116 is rotated by the revolution of the planet gear. The outer gear 118 that is disposed on the outer periphery of the planet gear 116 and engages with each planet gear is fixed by fitting the fixing portion 1181 into a groove (not shown) in the lifting device case 111, so that the planet gear guide Function as. Accordingly, the rotation of the center gear 115 is transmitted to the pedestal 117. Since the square shaft 12 is fitted to the convex portion 1171 of the pedestal 117, it rotates integrally with the pedestal 117.

  That is, in order to move the slat 6 up and down, the lifting device 11 is operated as follows. By pulling the front side 31 of the loop cord 3, when the pulley 112 is rotated forward, the engagement piece 1121 of the pulley 112 rotates forward. With this rotation, the engagement piece 1121 hits the end portion 114a of the clutch spring 114, and the clutch spring 114 expands in diameter, so that the clutch spring 114 and the clutch shaft 113 also rotate forward. As the clutch shaft 113 rotates forward, the center gear 115 connected to the convex portion 1131 of the clutch shaft rotates forward. As the center gear 115 rotates, the planet gear 116 fitted to the center gear 115 revolves while rotating, so that the pedestal 117 that supports the planet gear 116 rotates toward the opposite side of the center gear 115, that is, toward the back. To do. As a result, the square shaft 12 connected to the pedestal 117 also rotates to the back as the pedestal 117 rotates. The shaft 13 to which the square shaft 12 is connected via the member 132 also rotates to the back in accordance with the pitch of the feed screw 14 as the square shaft 12 rotates. The latching means 15 rotates in conjunction with the rotation of the shaft 13, and one of the end portions 151 a and 151 b of the torsion coil spring 151 comes into contact with the member 229, so that the latching means 15 stops rotating and the slat 6 As the angle is changed, the latching means 15 expands and only the shaft 13 continues to rotate. Further, as the shaft 13 rotates, the lift cord 4 fixed to the clip 16 on the shaft 13 wraps around the shaft 13 without overlapping, and the length L of the lift cord 4 shown in FIG. The bottom rail 7 goes up and goes up sequentially from the lower slat 6.

  When the back side 32 of the loop cord 3 is pulled, the pulley 112 rotates to the back, which is the reverse of the above case, and the shaft 13 rotates to the front, with the result that the slat angle is changed. At the same time, the bottom rail 7 is lowered.

  By the way, how to prevent the blind from falling due to its own weight when the raising / lowering of the slat is stopped at the position where the slat is raised / lowered will be described.

  As shown in FIG. 6, the clutch shaft 113 is disposed so that one engagement piece 1132 is located on the outer periphery with the shorter distance between the ends 114 a and 114 b of the clutch spring 114. Even if the piece 1132 hits the end portions 114a and 114b and the clutch spring 114 is rotated, the clutch spring 114 is reduced in diameter so that it does not rotate around the projection 1111 and the clutch shaft 113 itself does not rotate. Therefore, since the clutch shaft 113 does not rotate, the center gear 115 also does not rotate, and finally the shaft 13 does not rotate. Therefore, even if the hand is released from the loop cord 3, the slat 6 does not fall due to its own weight.

  That is, in the blind of the present invention, even if the bottom rail 7 descends due to its own weight and the shaft 13 tries to rotate via the lift cord 4, this rotation is caused by the square shaft 12, the pedestal 117, the planet gear 116, and the center gear 115. Since they are transmitted in order, only the clutch shaft 113, not the pulley 112, tries to rotate and hits the end 114a or 114b of the clutch spring. As a result, the diameter of the clutch spring cannot be increased, and as a result, the clutch shaft 113 connected to the center gear 115 cannot rotate, so that the slat 6 is prevented from dropping due to its own weight. As described above, in the blind according to the present invention, the clutch shaft 113 and the clutch spring 114 function as a self-weight fall prevention means, and the present invention constitutes the self-weight fall prevention means with such a very simple configuration. It has an excellent effect of being.

  Hereinafter, with respect to the cord fixing means 8 for fixing the lift cord 4 and the ladder cord 5 with the bottom rail 7, FIG. 7, which is a perspective view of the cord fixing means 8, and a sectional view of the bottom rail 7 in the lateral direction. This will be described with reference to FIG.

  According to FIG. 7, the cord fixing means 8 includes a cord fixing member 81 and a lift cord adjusting member 82 that is inserted into and fixed to a through hole provided in the cord fixing member 81. The cord fixing member 81 includes a bottom member 811 (preferably a disc shape or a polygonal shape) and a convex member 812 provided preferably at the center of the bottom portion. The bottom member 811 is provided with a hole 813 that penetrates to the top surface of the convex member 812. The hole 813 is preferably formed so that the sectional area of the hole is reduced near the upper surface of the convex member 812 and the lift cord adjusting member 82 is firmly fixed. For example, the hole 813 is formed so that the longitudinal section thereof has a truncated cone shape, a truncated pyramid shape, a convex shape, or the like. Further, a groove portion 814 for arranging a ladder cord is provided on the surface of the bottom member 811 on the convex member 812 side from the edge of the bottom member 811 to the lower portion of the convex member 812. The convex member 812 is formed such that at least a side surface 815 corresponding to the groove portion 814 can arrange the ladder cord 5 along the side surface. For example, the side surface 815 is a flat surface. Then, the support cord 51 of the ladder cord 5 is inserted into the hole 71 provided in the bottom portion of the bottom rail 7 in a state where the support cord 51 is disposed in the groove portion 814 of the cord fixing member 81 so that the cord fixing member 81 can be firmly fixed. Has been.

  The lift cord adjusting member 82 is made of a member (a columnar body such as a quadrangular column or a cylinder provided with a winding groove, a quadrangular frame, or the like) around which the lift cord 4 can be wound. For example, the lift cord adjusting member 82 is made of a frame, and as shown by a broken line in FIG. 7, the lift cord adjusting member 82 in which the lift cord 4 is wound around one side of the frame is fitted into the hole 813 from below. In some cases, the hole 813 is designed not to be easily removed. In addition, when the lift cord adjusting member 82 is fitted into the hole 813, the cord fixing member 81 and the lift cord adjusting member can be extracted from the upper surface of the convex member of the hole 813 which is a through hole. 82 is configured.

  When the cord fixing means 8 in which the lift cord adjusting member 82 with the lift cord 4 wound around the hole 813 is inserted and fixed in this way is inserted into the hole 71 provided on the bottom surface of the bottom rail 7, FIG. As shown, if the cord fixing member 81 is inserted into the hole 71 while the column cord 51 of the ladder cord 5 is held in the groove portion 814 of the cord fixing member 81, the lift cord 4 and the ladder cord 5 are formed at the bottom of the bottom rail 7. Can be fixed.

  Accordingly, in the present invention, the length of the lift cord 4 can be easily adjusted in mm by changing the winding length of the lift cord 4 at the lift cord adjusting member 82. Further, the length of the support cord 51 of the ladder cord 5 can be easily adjusted in mm by changing the length over which the ladder cord 5 is passed over the groove portion 814. Accordingly, in the present invention, the overall length of the lift cord 4 and the ladder cord 5 at the lift cord adjusting member 82 can be adjusted by a simple fixing means configuration, for example, only when the blind is attached to a window frame or the like. Instead, the height of the blind can be adjusted even after the blind is attached to a window frame or the like.

  In the present embodiment, an example in which only one planetary gear mechanism C2 is arranged has been described. However, the planetary gear mechanism C2 (from the center gear 115 to the outer gear 118) is arranged after the outer gear 118 so that a larger blind can be accommodated. 1 or more) may be arranged in series, and the components of the planetary gear mechanism C2 can be selected as appropriate, so that the gear ratio (the number of teeth of the outer gear to the number of teeth of the center gear) can be set to the weight and size of the blind. It is possible to set it freely. In this case, the hexagonal concave portion 1151 of the center gear 115 functions as an input shaft, and when this shaft rotates once, the gear ratio is the number of rotations of the convex portion 1171 of the pedestal 117 that functions as an output shaft.

  When setting the gear ratio, and when two or more planetary gear mechanisms C2 are arranged in series, the following may be performed.

  In order to achieve a predetermined uniform operating load (eg, within 3.0 kg) without depending on the weight or size of the blind, for example, the required pulling force of the loop cord and / or the total slats of the blind The gear ratio and the number of planetary gear mechanisms may be appropriately selected according to the total weight. For example, depending on how much the predetermined operating load is set, as a guideline, as shown in Table 1 below, if the gear ratio is selected according to the total weight of all slats of the blind, the weight From the point of damping action, in response to the increase in the size and weight of the blinds, it is possible to freely perform the raising / lowering operation of the blinds, regardless of age or sex, for both weak and strong people.

  In Table 1, when the gear ratio is 9.0: 1, a mechanism in which two planetary gear mechanisms having a gear ratio of 3.0: 1 are connected may be used. When these two planetary gear mechanisms are used, the concave portion 1151 of the center gear 115 of the second planetary gear mechanism may be fitted and connected to the convex portion 1171 of the pedestal 117 of the first planetary gear mechanism. The connection may be similarly performed when three or more planetary gear mechanisms are used.

  Table 1 shows the relationship between the weight of all blind slats and the gear ratio as an example for achieving a predetermined operating load. Other than these gear ratios are also appropriately selected and used. It is possible. For example, when a planetary gear mechanism having a gear ratio lower than 3.0: 1 is used, the speed of raising and lowering the blind is increased, and the operation load becomes heavy. This makes it possible to answer the demand for blinds that can be raised and lowered quickly. Also, when using a planetary gear mechanism having a gear ratio higher than 9.0: 1, the speed of raising and lowering the blinds is slow, and the operation load is lower. In the case of blinds, it is possible to respond to customer requests for blinds with lower operating loads.

  In addition to the gear ratios shown in Table 1, the types of gear ratios can be increased by adding or combining components. Further, the range of the weight of the blind slat in the relationship between the total blind slat and the gear ratio shown in Table 1 may be arbitrarily changed. This would be effective in making blinds that use more slats.

  When two or more planetary gear mechanisms are connected, a desired reduction ratio can be freely obtained by appropriately connecting the same or different gear ratios. For example, when a planetary gear mechanism having a gear ratio of 27: 1 is finally obtained, three planetary gear mechanisms having a gear ratio of 3.0: 1 are connected, or gear ratios of 9: 1 and 3: 1 or 4. What is necessary is just to connect two planetary gear mechanisms of 5: 1 and 6: 1. Connecting planetary gear mechanisms having the same gear ratio is more meaningful in manufacturing the gear and has the advantage that fewer types of components including the gear are required. However, a combination of planetary gear mechanisms having a plurality of gear ratios provides a greater selection ratio than a combination of planetary gear mechanisms having the same gear ratio.

  The number of teeth of the center gear, the planet gear, and the outer gear in the planetary gear mechanism is not particularly limited. Generally, the outer gear 118 has an inner diameter of a portion of the lifting device case 111 into which the planetary gear mechanism is inserted. The outer diameter is determined, and the number of teeth of the outer gear, the planet gear, and the center gear is determined therefrom.

  According to the present invention, if the diameter of the shaft 13 is increased, the winding length of the lift cord 4 by one rotation is increased, and it is possible to cope with a heavier blind.

  When the size of the blind is increased, it is necessary to change the lift cord 4 to a thicker one, and in this case, it is necessary to change the feed pitch so that the lift cord 4 does not get entangled. Further, when the size of the blind is increased, it is necessary to provide two or more sets of lift cords 4 and ladder cords 5 in order to support each slat 6 horizontally. In the present invention, one shaft 13 and a feed screw are provided. 14, the plurality of lift cords 4 can be suspended, and the specifications can be easily changed.

  In the present invention, all the components of the lifting mechanism 1 are arranged and housed in series inside the head box, the structure is simple, and since only one shaft 13 is provided, the feed screw 14 and the nut Replacing only the structure 133 can cope with larger size.

  The blind of the present invention can be enlarged and has a simple configuration. Moreover, it has the outstanding effect that the maximum length of a blind can be set suitably. Therefore, it can be used in the blind manufacturing industry.

The perspective view which shows the blind of this invention typically. FIG. 2 is an enlarged perspective view schematically showing a head part B1 of FIG. The disassembled perspective view which shows the raising / lowering mechanism of a slat typically. It is a figure for demonstrating a frame, Comprising: (a) Top view, (b) Side view from X direction, (c) Side view from Y direction. The disassembled perspective view of the raising / lowering apparatus for demonstrating an raising / lowering apparatus. The schematic diagram for demonstrating arrangement | positioning of each component in the clutch mechanism C1. The perspective view of a fixing means. Sectional drawing of the bottom rail for demonstrating arrangement | positioning in the bottom rail of a fixing means.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lifting mechanism 2 Head box 3 Loop cord 4 Lift code 5 Ladder cord 6 Slat 7 Bottom rail 8 Cord fixing means 11 Lifting device 12 Square shaft 13 Shaft 14 Feed screw 15 Latching means 16 Clip 21a, 21b Head box side wall 22 Frame Body 31 Front side 32 Back side 51 Column cord 52 Step cord 61 Hole 71 Hole 81 Fixing member 82 Frame body 111 Lifting device case 111a Cover 1111 Protruding portion 1112 Fixing member 1113 Loop cord roller 1114 Opening portion 112 Pulley 1121 Engagement piece 1122a, 1122b Rising portion 113 Clutch shaft 1131 Convex portion 1132 Engaging piece 114 Clutch spring 114a, 114b End portion 115 Center gear 1151 Concave portion 116 Planet gear 117 Stall 1171 Convex portion 118 Outer gear 1181 Fixing portion 119 Spacer 131 Square hole 132 Member 133 Nut structure 134 Member 151 Torsion coil spring 151a, 151b End portion 221 Shaft roller 222 Shaft frame body 223 Lift code frame body 224 Plate 225 Lift code through hole 226 Lift code roller 227 Ladder code through hole 228 Plate 229 Member 811 Bottom member 812 Convex member 813 Hole 814 Groove 815 Surface B Blind B1 Head B2 Blind C1 Clutch mechanism C2 Planetary gear mechanism F Fixture L length

Claims (8)

The slat includes a slat lifting device, and a lift cord shaft connected to the lifting device. The slat lifting device includes a pulley, a clutch shaft, and a clutch spring that are rotationally driven by the operation cord in series in this order. The slat is provided with a self-weight fall prevention mechanism and a planetary gear mechanism that rotates in accordance with the rotation of the pulley and functions as a weight reduction means when raising and lowering the slat in series in this order. The blind is characterized in that the shaft for the lift cord is rotated through the slat so as to move up and down. The blind according to claim 1, further comprising an adjusting unit that adjusts a length of the lift cord and a length of a ladder cord that supports the slat. The adjustment means is provided on the bottom rail located under the lowermost slat, and includes a member for winding the lift cord, a hole portion for inserting and fixing the member, and a groove portion for arranging the ladder cord. The blind according to claim 2, comprising a member. The fixing member includes a bottom member and a convex member formed on the bottom member. The hole portion penetrates the bottom member and the convex member, and the groove portion is formed on the surface of the bottom member on the convex member side. The blind according to claim 3, wherein a side surface of the convex member provided and corresponding to the groove is planar. The slat lifting device and the lift cord shaft are housed in series in a head box provided in the upper portion of the slat, and an operation cord hung on the pulley is provided in an opening provided in an end portion of the head box. The blind according to any one of claims 1 to 4, wherein the blind is configured to be hung from the bottom. The shaft for the lift cord is connected to the lifting device at one end and connected to the feed screw fixed to the end of the head box at the other end, and driven by rotation of the pulley. When the shaft for the lift cord is rotated via the lifting device, the shaft for the lift cord moves according to the pitch of the feed screw, and the lift cords are wound around the shaft without overlapping each other so that the slats are lifted and lowered. The blind according to claim 1, which is configured. The pulley includes a groove portion for hooking an operation cord, and rising portions on both sides of the groove portion have a gear shape, and a tooth portion of one rising portion and a tooth portion of the other rising portion are mutually The blind according to any one of claims 1 to 6, wherein the blind is provided so as not to face each other, and an inclined protrusion is provided on at least a part of the inner surface of each tooth portion. The planetary gear mechanism is configured such that a gear ratio can be changed according to a required pulling force of an operation cord or a weight of all slats, or according to the pulling force and the weight of all slats. The blind according to claim 1.

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