JP7263598B2 - Height adjuster - Google Patents

Description

The present invention relates to a bottom rail height adjustment device for horizontal blinds.

The horizontal blind is provided with a height adjusting device for adjusting the height position of the bottom rail when the blind is fully open. The bottom rail of the horizontal blind is supported by a ladder cord, and the height of the bottom rail is adjusted by the height adjusting device by adjusting the length of the ladder cord to a desired length.

Some conventional height adjusting devices have a bottom base that is provided on a bottom rail and is engaged with the bottom rail, and a cylindrical winding shaft that is supported by the bottom base. The bottom base has a cylindrical portion in the center, and the winding shaft is inserted into the cylindrical portion from below and rotatably supported. The lower ends of the pair of ladder cords enter from the upper surface of the winding shaft that has escaped from the cylindrical portion, and the lower ends are connected to each other inside the winding shaft so that the ladder cords can be wound up and unwound by the height adjusting device. , and the length of the ladder cord can be adjusted (see Patent Document 1, for example).

Japanese Unexamined Patent Application Publication No. 2010-31481

In the conventional height adjustment device as described above, the ladder cord guided from the lower surface of the bottom rail is guided along the tubular portion from the lower end to the upper end of the tubular portion, crosses the upper end of the tubular portion and enters the tubular portion. It enters and is fixed to the winding shaft. A cover attached to the tubular portion is provided to prevent the ladder cord wound around the tubular portion from slipping out of the tubular portion. As described above, the conventional height adjustment device has a complicated structure, and the attachment of the ladder cord is also complicated. For this reason, the conventional height adjustment device is required to have a simple structure that prevents the ladder cord from coming off.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a height adjusting device that can have a simple structure.

In order to solve the above problems, the present invention provides a bottom rail height adjusting device for a horizontal blind, comprising: a cylindrical winding shaft extending along an axis for winding a ladder cord; a cylindrical shaft support member extending along the axis and formed to be accommodated and supported rotatably around the axis; and a cylindrical shaft support member formed to support the shaft support member so as not to be rotatable around the axis. a bottom base attached to the bottom rail, wherein the winding shaft has a pair of holes which are holes passing through the winding shaft in a direction intersecting the axis; The support member is characterized by having a pair of guide spaces that are spaces that communicate the outside and the inside of the shaft support member.

Further, each of the pair of holes may have a locking portion that is formed so as to be able to lock the ladder cord.

Further, the locking portion of the hole may be a gap extending along the axis line and having a width capable of clamping the ladder cord.

Further, each of the pair of holes has an insertion portion that is a space continuing from the locking portion in the axial direction, and the insertion portion has a size that allows the ladder cord to be inserted thereinto. good too.

Further, each of the pair of guide spaces of the shaft support member is a recess formed at one end of the shaft support member on one side in the axial direction and recessed toward the other side in the axial direction, The shaft support member may be supported on the bottom base on the one side.

An engaging portion that can be engaged with each other is provided between the winding shaft and the shaft support member, and the engaging portion has at least a pair of a convex portion and a concave portion, The protrusion may be a portion protruding in a direction intersecting the axis, and the recess may be a portion recessed so as to accommodate the protrusion.

Further, the winding shaft may be formed with a groove that can be engaged with a tool for rotating the winding shaft at the other end of the winding shaft in the axial direction.

Further, the winding shaft is formed with another groove that intersects with the groove in which the lifting cord attached to the winding shaft can be retracted from the other end along the axis. good too.

Further, the shaft support member may have a holding portion that holds the lifting cord on the side of the pair of guide spaces of the shaft support member.

The bottom base has an accommodation recess formed to accommodate one end of the shaft support member in the axial direction. It may have a contact surface, which is a mutually opposing surface that contacts the end on one side.

The height adjustment device according to the present invention can have a simple structure.

1 is a front view of a horizontal blind device having a height adjusting device according to an embodiment of the invention; FIG. FIG. 2 is a side view of the horizontal blind device shown in FIG. 1; It is a figure which shows the bottom rail in a horizontal blind apparatus, Fig.3 (a) is a perspective view, FIG.3(b) is sectional drawing in the cross section which cross|intersects the extending direction of a bottom rail. 1 is a perspective view of a height adjusting device showing a schematic configuration of a height adjusting device according to an embodiment; FIG. 5(a) is a perspective view of the bottom base as seen from below, and FIG. 5(b) is a perspective view of the bottom base as seen from above. FIG. 6(a) is a perspective view of the shaft support member and FIG. 6(b) is a top view of the shaft support member in the height adjustment device to which the lifting cord is fixed. FIG. It is a figure which shows the winding shaft in a height adjustment apparatus, Fig.7 (a) is a perspective view of a winding shaft, FIG.7(b) is a front view of a winding shaft. FIG. 5 is a cross-sectional view of the height adjustment device taken along line AA shown in FIG. 4; FIG. 9A is a cross-sectional view of the horizontal blind device for explaining the process of winding the ladder cord around the winding shaft in the height adjusting device, and FIG. 9A is a cross-sectional view showing a state in which the ladder cord is not wound. , and FIG. 9(b) is a partial cross-sectional view showing a state in which the ladder cord is wound. FIG. 10 is a side view of another form of horizontal blind device;

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

A height adjusting device according to the present invention adjusts the height position of a bottom rail of a horizontal blind, and is applied to the horizontal blind. The horizontal blinds to which the height adjusting device according to the present invention is applied are known horizontal blinds, and are not limited to specific horizontal blinds. For example, the height adjustment device 1 according to the embodiment of the present invention is applied to a horizontal blind device 100 as a horizontal blind shown in FIGS. FIG. 1 is a front view of a horizontal blind device 100 having a height adjustment device 1 according to an embodiment of the invention, and FIG. 2 is a side view of the horizontal blind device 100. FIG. The horizontal blind device 100 is fixed to a window frame or the like to enable visibility of the outside from inside the room, block visibility of the inside of the room from the outside, and allow light and wind to enter the room. It is a cover that prevents light and wind from entering the room.

A horizontal blind device 100 to which the height adjustment device 1 according to the embodiment of the present invention is applied includes a head box 110, an operation cord 120, a ladder cord 130, an elevating cord 140, a bottom rail 150, and a slat 160. and 1 and 2, the direction in which the head box 110 of the horizontal blind device 100 extends is defined as the longitudinal direction LR, the left side in FIG. 1 is the left side L, and the right side is the right side in FIG. Let R. Further, the direction in which the bottom rail 150 moves up and down is defined as a height direction UD, the head box 110 side is defined as an upper side U in the height direction UD, and the bottom rail 150 side is defined as a lower side D in the height direction UD. Also, in FIG. 2, the left-right direction is defined as the front-rear direction (width direction) FB, and the left side is defined as the front side F and the right side as the rear side B in the front-rear direction FB. Specifically, the front side F is the side where the operation cord 120 hangs down from the head box 110 .

The headbox 110 is a part attached to the window frame and has a bracket (not shown), and the headbox 110 is attached to the window frame via the bracket. An operation cord 120 hangs down from the right side R of the head box 110 . Ladder cords 130 and lifting cords 140 hang down from the head box 110 at regular intervals in the longitudinal direction LR.

The headbox 110 has therein a drive mechanism (not shown) and a winding drum (not shown). The drive mechanism and each winding drum are connected by a common rotating shaft. An operation cord 120 is connected to the drive mechanism. The winding drums are provided at positions where the ladder cord 130 and the lifting cord 140 hang down. A ladder cord 130 of a predetermined length is attached to the winding drum so as to be drawn into or sent out from the head box 110, and the lifting cord 140 is wound or unwound. wrapped around.

The operation code 120 is a looped code. By operating the operation cord 120 , rotational driving force is transmitted to the drive mechanism arranged inside the head box 110 . This rotational driving force is transmitted to the winding drum via the above-described common rotating shaft, causing the ladder cord 130 to move up and down and the lifting cord 140 to be wound or unwound. Further, by operating the operation cord 120, operations related to tilting of the slat 160 and raising and lowering of the bottom rail 150, which will be described later, are performed.

The ladder cord 130 supports the bottom rail 150 on the lower side D, and the bottom rail 150 is suspended from the headbox 110 by the ladder cord 130 . The ladder cord 130 has one front ladder cord 131 and one rear ladder cord 132 . The front ladder cord 131 hangs down from the headbox 110 on the front side F of the horizontal blind device 100 . A rear ladder cord 132 depends from the headbox 110 on the rear side B of the horizontal blind system 100 .

The upper end of the front ladder cord 131 and the upper end of the rear ladder cord 132 are attached to the winding drum inside the headbox 110 . A lower end portion of the front ladder cord 131 and a lower end portion of the rear ladder cord 132 are each held by the height adjustment device 1 on the bottom rail 150 . Knots 131a and 132a are formed at the lower ends of the front ladder cord 131 and the rear ladder cord 132, respectively. The "knot 131a" is a knob formed by connecting the lower ends of the front ladder cords 131, and the "knot 132a" is a knob formed by connecting the lower ends of the rear ladder cords 132. It's about. The knots 131a and 132a of the front ladder cord 131 and the rear ladder cord 132 are thicker than the portions of the front ladder cord 131 and the rear ladder cord 132 other than the knots 131a and 132a.

The front side ladder cord 131 and the rear side ladder cord 132 are connected to each other by a connection thread group 133 . The group of connecting threads 133 is formed of a group of two threads spaced apart by a predetermined distance in the height direction UD. The connecting thread group 133 is provided at the left L and right R ends of the front ladder cord 131 and the rear ladder cord 132 at the same height position in the height direction UD. Each thread group of the connecting thread group 133 is provided in a pair with a slight gap enough to accommodate the slats 160 in the height direction UD. A slat 160, which will be described later, is inserted between the threads of each thread group.

The lifting cord 140 is at substantially the same position as the ladder cord 130 in the longitudinal direction LR and hangs down from substantially the central portion of the head box 110 in the front-rear direction FB. The lifting cord 140 has a front lifting cord 141 and a rear lifting cord 142 . The front lifting cord 141 hangs down from the front side F of the head box 110 in the front-rear direction FB. The rear lifting cord 142 hangs down from the rear side B of the head box 110 in the front-rear direction FB. The front lifting cord 141 and the rear lifting cord 142 are wound around the winding drum in the head box 110 at the upper end of the upper side U, respectively. The front lifting cord 141 and the rear lifting cord 142 are fixed to the bottom rail 150 at the lower end of the lower side D. As shown in FIG. The bottom rail 150 moves upward (U) by winding the front lifting cord 141 and the rear lifting cord 142 on the winding drum. Further, the bottom rail 150 moves (lowers) downward D by unwinding the front lifting cord 141 and the rear lifting cord 142 from the winding drum.

The front lifting cord 141 extends from the head box 110 to the bottom rail 150 at a predetermined location in the height direction UD through between a pair of threads of the connecting thread group 133 of the front ladder cord 131 . The rear lifting cord 142 extends from the head box 110 to the bottom rail 150 at a predetermined point in the height direction UD through between a pair of threads of the connecting thread group 133 of the rear ladder cord 132 .

3A and 3B are diagrams showing the bottom rail 150 in the horizontal blind device 100, FIG. 3A being a perspective view, and FIG. The bottom rail 150 is provided at the lowest position D (lower limit position) in the height direction UD in the horizontal blind device 100 . The bottom rail 150 has a top surface 151 facing the headbox 110 and a bottom surface 152 facing away from the headbox 110 . The bottom rail 150 has a circular accommodation hole 153 that accommodates the shaft support member 12 and the winding shaft 13 of the height adjustment device 1, which will be described later. The accommodation hole 153 penetrates from the upper surface 151 to the lower surface 152 . The accommodation hole 153 has a small accommodation hole portion 154 and a large accommodation hole portion 155 . The small accommodation hole portion 154 accommodates the winding shaft 13 . The large accommodation hole portion 155 accommodates the shaft support member 12 . The small accommodation hole portion 154 has a diameter smaller than that of the large accommodation hole portion 155 and is located on the upper surface 151 side of the large accommodation hole portion 155 .

The slats 160 are thin plate-like members, and each slat 160 is inserted between a pair of thread groups of the connecting thread groups 133 of the ladder cords 130 located at the same position in the height direction UD.

The horizontal blind device 100 having the configuration described above is provided with the height adjustment device 1 according to the embodiment of the present invention. FIG. 4 is a perspective view of the height adjustment device 1 showing a schematic configuration of the height adjustment device 1 according to the present embodiment, and FIG. 5 is a diagram showing the bottom base 11 in the height adjustment device 1. FIG. 5(a) is a perspective view of the bottom base 11 as seen from below, FIG. 5(b) is a perspective view of the bottom base 11 as seen from above, and FIG. 6(a) is a perspective view of the shaft support member 12, FIG. 6(b) is a top view of the shaft support member 12, and FIG. 7A is a perspective view of the winding shaft 13, FIG. 7B is a front view of the winding shaft 13, and FIG. 5] is a cross-sectional view of the height adjusting device 1 taken along line AA shown in FIG. 4. [FIG.

As shown in FIGS. 4 to 8, the height adjustment device 1 includes a cylindrical winding shaft 13 extending along an axis x for winding ladder cords 131 and 132, and a winding shaft 13 that accommodates the axis x. A cylindrical shaft support member 12 extending along an axis x formed to support the shaft rotatably around x, and a bottom formed to support the shaft support member 12 so as to be non-rotatable around the axis x. and a bottom base 11 attached to a rail 150 . The winding shaft 13 has a pair of holes 18 that penetrate the winding shaft 13 in a direction intersecting the axis x. The shaft support member 12 has a pair of guide spaces 12d that are spaces that communicate the outside and the inside of the shaft support member 12 . The configuration of the height adjustment device 1 will be specifically described below.

The bottom base 11 is a member extending like a plate, and supports the shaft support member 12 so as not to rotate. The bottom base 11 has a surface 11a facing the lower side D and a back surface 11b facing the upper side U. As shown in FIG. The bottom base 11 has two through holes 11c. Each through-hole 11c is formed at a left L end and a right R end in the longitudinal direction LR. The through hole 11c penetrates the bottom base 11 in the thickness direction. A screw (not shown) for fixing the bottom base 11 to the bottom rail 150 is inserted through the through hole 11c.

The bottom base 11 has an outer wall portion 11d and a housing recess 11e. The outer wall portion 11d extends upward U along the outer edge of the bottom base 11 on the side of the back surface 11b. The outer wall portion 11d has a pair of guide recesses 11f. Each guide recess 11f is a portion recessed from the upper side U to the lower side D, and is formed on the front side F and the rear side B in the front-rear direction FB and at the central portion of the outer wall portion 11d in the longitudinal direction LR. The guide recess 11 f on the front side F guides the front lifting cord 141 . The guide recess 11f on the rear side B guides the rear lifting cord 142. As shown in FIG.

The accommodation recess 11e is a recess formed to accommodate the shaft support member 12 at an end portion 12b (fixed portion) on one side (lower side D) in the direction of the axis x. 12 has a contact surface 11j which is a surface facing each other and contacts the end portion 12b of the lower side D of 12. As shown in FIG. Specifically, the housing recess 11e is defined by an outer wall portion 11d on the side of the back surface 11b of the bottom base 11 and a pair of inner wall portions 11g extending between the outer wall portions 11d in the front-rear direction FB. there is The left side L inner wall portion 11g is located on the right side R of the left side L through hole 11c. The right R inner wall portion 11g is located on the left side L of the right R through hole 11c. The surface facing the inside of the outer wall portion 11d is the contact surface 11j.

A convex portion 11h is formed in the central portion of the accommodation concave portion 11e. The convex portion 11h protrudes upward U from the back surface 11b of the bottom base 11 and extends annularly. A winding shaft 13, which will be described later, is rotatably accommodated in a region 11i defined by the convex portion 11h.

The shaft support member 12 has a cylindrical wall portion 12a and two fixing portions 12b. The cylindrical wall portion 12a and the fixed portion 12b are integrally formed with each other.

The cylindrical wall portion 12a is positioned on the upper side U with respect to the fixed portion 12b. The cylindrical wall portion 12a has a cylindrical shape. The cylindrical wall portion 12 a is accommodated in the large accommodation hole portion 155 of the bottom rail 150 . The cylindrical wall portion 12 a of the large accommodation hole portion 155 may or may not be in contact with the inner wall of the large accommodation hole portion 155 . An engaging portion 20 that can be engaged with each other is provided between the winding shaft 13 and the shaft support member 12, and the engaging portion 20 has at least a pair of a convex portion and a concave portion. The convex portion is a portion that protrudes in a direction intersecting the axis x, and the concave portion is a portion that is recessed so as to accommodate the convex portion. In this embodiment, the recess is the slit 12c, and the shaft support member 12 has the slit 12c as the recess of the engaging portion 20. As shown in FIG. Specifically, the cylindrical wall portion 12a has four slits 12c. Each slit 12c extends from the end facing the upper side U toward the lower side D halfway through the cylindrical wall portion 12a. Each slit 12c is formed at angular intervals of 90° in the circumferential direction. Only one slit 12c may be provided, or a plurality of slits 12c may be provided.

The two fixing parts 12b are respectively a left fixing part 12bl and a right fixing part 12br. The left fixing portion 12bl is positioned on the left side L with respect to the center of the cylindrical wall portion 12a, and the right fixing portion 12br is positioned on the right side R with respect to the center of the cylindrical wall portion 12a. The left fixing portion 12bl and the right fixing portion 12br are integrally formed at the ends of the lower side D of the cylindrical wall portion 12a. The left fixing portion 12bl and the right fixing portion 12br are provided at a predetermined interval in the longitudinal direction LR. A guide space 12d is formed between the left fixing portion 12bl and the right fixing portion 12br in the longitudinal direction LR. The guide space 12d on the front side F is a concave portion recessed upwardly U formed in the lower end portion 12b in the direction of the axis x, and the front ladder cord 131 is passed through the inner side of the cylindrical wall portion 12a. The guide space 12d on the rear side B is a concave portion recessed upwardly U formed in the lower end portion 12b in the direction of the axis x, and the rear side ladder cord 132 is passed through the inner side of the cylindrical wall portion 12a.

The left fixing portion 12bl and the right fixing portion 12br each have a guide holding portion (holding portion) 12e. The guide holding portion 12e of the left fixing portion 12bl is provided at the end portion of the front side F of the left fixing portion 12bl. The guide holding portion 12e of the right fixing portion 12br is provided at the end portion of the rear side B of the right fixing portion 12br. The guide holding portion 12e of the left fixing portion 12bl holds the lower end portion of the front lifting cord 141. As shown in FIG. The guide holding portion 12 e of the right fixing portion 12 br holds the lower end portion of the rear lifting cord 142 .

Each guide holding portion 12e has a guide hole portion 12f and an engaging recess portion 12g. Through each guide hole 12f, the front lifting cord 141 and the rear lifting cord 142 pass from the lower side D to the upper side U of the left fixing portion 12bl and the right fixing portion 12br. Each engaging recess 12g is a concave portion formed at the end of the left fixing portion 12bl and the right fixing portion 12br in the longitudinal direction LR, and formed at the lower ends of the front lifting cord 141 and the rear lifting cord 142. The knots 141a and 142a are locked. The "knot 141a" is a knob formed by connecting the lower ends of the front lifting cords 141, and the "knot 142a" is a knob formed by connecting the lower ends of the rear lifting cords 142. It's about. The knots 141a and 142a of the front lifting cord 141 and the rear lifting cord 142 are thicker than the portions of the front lifting cord 141 and the rear lifting cord 142 other than the knots 141a and 142a.

The distance _W1 between the contact surfaces 11j of the outer wall portion 11d in the front-rear direction FB of the housing recess 11e is such that the shaft support member 12 can be accommodated and held at the end portion 12b of the lower side D. 12, the interval _W2 between the outer surfaces of the left fixing portion 12bl and the right fixing portion 12br in the front-rear direction FB. As a result, the shaft support member 12 is housed between the outer wall portions 11d in the front-rear direction FB of the housing recess 11e at the lower end portion 12b so as not to rotate.

The take-up shaft 13 winds a front ladder cord 131 and a rear ladder cord 132 facing each other across the bottom rail 150 from the front side F and the rear side B, respectively, around the outer peripheral surface 17a. The winding shaft 13 is inserted into the cylindrical wall portion 12a of the shaft support member 12 from the upper side U. As shown in FIG. The winding shaft 13 is rotatably supported by the shaft support member 12 .

The winding shaft 13 has a cylindrical portion 14 and a flange portion 15 . A cylindrical portion 14 of the winding shaft 13 is formed in a tubular shape with one end closed. The cylindrical portion 14 is a bottomed cylindrical portion extending along the axis x and has a disk-shaped closed cylindrical portion (closed portion) 16 and a cylindrical winding cylindrical portion 17 . The flange portion 15 is a portion that protrudes radially outward from the outer peripheral surface of the cylindrical portion 14 and extends over the entire circumference. The closed cylindrical portion 16 is located on the upper side U of the flange portion 15 , and the winding cylindrical portion 17 is located on the lower side D of the flange portion 15 .

The closing cylinder 16 closes the cylinder 14 on the upper side U. The closed cylindrical portion 16 is rotatably received in the small receiving hole portion 154 of the bottom rail 150 . The closed cylindrical portion 16 may or may not be in contact with the inner wall of the small accommodation hole portion 154 at the small accommodation hole portion 154 . The closed cylindrical portion 16 is formed with a groove with which a tool for rotating the winding shaft 13 can be engaged. For example, the closed cylindrical portion 16 includes a tip of a slotted screwdriver recessed downward D in the end face of the upper side U, a groove 16a with which a coin or the like can be engaged, and a groove formed perpendicular to the groove 16a. 16b are provided. The closed cylindrical portion 16 has holes 16c at the bottoms of the grooves 16a and 16b. The hole 16c is formed at the intersection of the cross-shaped grooves 16a and 16b.

The winding cylindrical portion 17 is a portion for winding a pair of the front ladder cord 131 and the rear ladder cord 132 facing each other across the bottom rail 150 in the front-rear direction FB around the outer peripheral surface 17a. In a state in which the winding shaft 13 is accommodated in the shaft support member 12, a pair of front sides are provided between the outer peripheral surface 17a of the winding cylindrical portion 17 and the inner peripheral surface of the cylindrical wall portion 12a of the shaft support member 12. A sufficient space S is provided for winding the ladder cord 131 and the rear ladder cord 132 (see FIGS. 8 and 9).

The winding cylindrical portion 17 has a pair of hole portions 18 formed at positions facing each other in the radial direction. Each hole 18 penetrates in a direction orthogonal to the axis x of the winding cylindrical portion 17 (hereinafter also referred to as radial direction). Each of the holes 18 has an engaging portion (a small hole portion 18b to be described later) that is formed so as to be capable of engaging the ladder cords 131 and 132 . The locking portion 18b of the hole portion 18 is a gap extending along the axis x and having a width that allows the ladder cords 131 and 132 to be clamped. Each of the holes 18 has an insertion portion (large hole portion 18a described later) which is a space continuing to the locking portion 18b in the direction of the axis x, and the ladder cords 131 and 132 can be inserted into the insertion portion 18a. has a large size. Specifically, each hole portion 18 has a large hole portion 18a as an insertion portion and a small hole portion 18b as a locking portion. The large hole portion 18 a is formed immediately below D of the flange portion 15 . A small hole portion 18b is continuously formed at the end portion of the lower side D of the large hole portion 18a.

The large hole portion 18 a is large enough to guide the knots 131 a and 132 a of the pair of front ladder cords 131 and rear ladder cords 132 to the inside of the winding cylindrical portion 17 . The width of the large hole portion 18a in the circumferential direction of the winding cylindrical portion 17 is formed so as to gradually narrow from the upper side U toward the lower side D. As shown in FIG.

The small hole portion 18b is large enough to prevent the knots 131a and 132a of the pair of front ladder cords 131 and rear ladder cords 132 from passing from the inside of the winding cylindrical portion 17 to the outside. The width of the small hole portion 18b in the circumferential direction of the winding cylindrical portion 17 is substantially the same from the upper side U to the lower side D, and is formed smaller than the knots 131a and 132a. The knots 131a and 132a are hooked and locked to the periphery of the small hole 18b inside the winding cylindrical portion 17. As shown in FIG. A lower end 18c of the lowermost side D of the small hole portion 18b is positioned substantially at the center of the winding cylindrical portion 17 in the height direction UD.

The flange portion 15 has an annular shape and protrudes radially outward from an outer peripheral surface 17 a of the winding cylindrical portion 17 . In the present embodiment, the convex portion of the engaging portion 20 described above is the engaging convex portion 15a, and the winding shaft 13 has the engaging convex portion 15a as the convex portion of the engaging portion 20. . Specifically, the flange portion 15 has four engaging protrusions 15 a corresponding to the slits 12 c of the engaging portion 20 . Each engagement convex part 15a is provided on the outer peripheral surface 15b of the flange part 15 with an angular interval of 90° in the circumferential direction. Each engaging protrusion 15a is fitted into each slit 12c of the shaft support member 12 so as to be able to come out.

The arrangement of the bottom base 11, the shaft support member 12, and the winding shaft 13 in the height adjustment device 1 will be described below. In the height adjustment device 1, each guide recess 11f of the bottom base 11 and the guide space 12d of the shaft support member 12 overlap in the front-rear direction FB.

The take-up shaft 13 is rotatably supported in a region 11 i inside the projection 11 h of the bottom base 11 while being housed in the shaft support member 12 . The end portion of the winding shaft 13 on the lower side D in the height direction UD is in contact with the inner peripheral surface of the convex portion 11h extending annularly on the outer peripheral surface thereof. Thereby, the shaft support member 12 accommodating the winding shaft 13 can be easily positioned with respect to the bottom base 11 .

The guide space 12 d in the cylindrical wall portion 12 a of the shaft support member 12 is located on the lower side D than the small hole portion 18 b in the winding cylindrical portion 17 of the winding shaft 13 . Specifically, the position of the upper end 12h of the upper side U of the guide space 12d in the direction of the axis x (height direction UD) is closer to the bottom base than the position of the lower end 18c of the lower side D of the small hole 18b in the height direction UD. 11 side (lower side D).

Below, the process of adjusting the height of the bottom rail 150 by the height adjusting device 1 will be described. 9A and 9B are cross-sectional views of the horizontal blind device 100 for explaining the process of winding the ladder cord 130 around the winding shaft 13 in the height adjustment device 1. FIG. 9(b) is a partial cross-sectional view showing a state in which the ladder cord 130 is wound. Before attaching the height adjustment device 1 to the bottom rail 150 , the ladder cord 130 and the lifting cord 140 are attached to the height adjustment device 1 .

First, the knots 141a and 142a formed at the lower end portions of the front elevation cord 141 and the rear elevation cord 142 of the shaft support member 12 are passed through the guide hole portion 12f from the side opposite to the cylindrical wall portion 12a in the guide holding portion 12e. It is hooked on the locking concave portion 12g. Next, the knots 131a and 132a formed at the lower ends of the front ladder cord 131 and the rear ladder cord 132 are inserted into the winding shaft 13 from the large hole 18a in the winding cylindrical portion 17 of the winding shaft 13, It is fixed by pushing it into the small hole portion 18b.

Next, the winding shaft 13 is mounted on the shaft support member 12 from the fixed portion 12b side by aligning the engaging projections 15a of the flange portion 15 of the winding shaft 13 with the slits 12c of the shaft support member 12 .

Next, the shaft support member 12 with the winding shaft 13 attached thereto is attached to the bottom base 11 . The front ladder cord 131 and the rear ladder cord 132 are led out from the guide recess 11 f of the bottom base 11 .

Next, the shaft support member 12 and the winding shaft 13 of the height adjustment device 1 are inserted into the receiving holes 153 of the bottom rail 150, and the bottom base 11 is fixed to the bottom rail 150 with screws. In this state, the groove portion 16 a of the closed cylindrical portion 16 of the winding shaft 13 of the height adjusting device 1 is exposed on the upper surface 151 of the bottom rail 150 . The operator rotates the winding shaft 13 by engaging a predetermined known tool (for example, a screwdriver, a coin) or the like in the groove 16a of the closed cylindrical portion 16 from the upper surface 151 side of the bottom rail 150 .

By rotating the winding shaft 13, the engaging projection 15a of the flange portion 15 is pulled out of the slit 12c of the shaft support member 12 in which it is fitted, and is fitted into another slit 12c adjacent in the rotational direction. move up to As the winding shaft 13 rotates, the front ladder cord 131 and the rear ladder cord 132 are wound around the outer peripheral surface 17a of the winding cylindrical portion 17 of the winding shaft 13, and the bottom rail 150 rises upward U. do.

According to the height adjusting device 1 as described above, the knots 131a and 132a of the front ladder cord 131 and the rear ladder cord 132 are in contact with the periphery of the small hole 18b inside the winding shaft 13. It is in. As a result, if the take-up shaft 13 is rotated regardless of the direction of rotation, the knots 131a and 132a are kept engaged with the periphery of the small hole portion 18b, and the front ladder cord 131 and the rear ladder cord 132 are maintained. can be reliably wound around the winding shaft 13.

Further, the front ladder cord 131 and the rear ladder cord 132, which are located on the rear end side of the knots 131a and 132a and outside the winding shaft 13, respectively extend to the lower side D to connect the shaft support member 12 and the bottom. It is drawn out from the base 11 to the outside of the height adjustment device 1 . As a result, the knots 131a and 132a of the front ladder cord 131 and the rear ladder cord 132 are pulled to the side (lower side D) opposite to the side (upper side U) where the large hole portion 18a is located. As the winding shaft 13 rotates, the knots 131a and 132a of the front ladder cord 131 and the rear ladder cord 132 are caught by the peripheral edges of the small holes 18b, and are securely locked and held by the winding shaft 13.

In addition, since the slit 12c of the shaft support member 12 and the engaging projection 15a of the winding shaft 13 are engaged with each other at predetermined angles of the winding shaft 13, the operator does not feel any noise or vibration at the time of engagement. can feel. Thereby, in each height adjusting device 1 provided in the same horizontal blind device 100, the winding shaft 13 can be rotated evenly. The winding shaft 13 does not rotate unless the engagement state with the shaft support member 12 is released, so that unintentional rotation of the winding shaft 13 can be reliably prevented.

In addition, the shaft support member 12 is in surface contact with the contact surface 11j of the outer wall portion 11d of the bottom base 11 in the front-rear direction FB on the outer surfaces of the left fixing portion 12bl and the right fixing portion 12br in the front-rear direction FB. installed. As a result, the shaft support member 12 can be easily attached to the bottom base 11 without requiring a separate fixing structure or the like. Furthermore, the rotation of the shaft support member 12 accompanying the rotation of the winding shaft 13 is prevented.

Moreover, in the case of the configuration in which the winding shaft is exposed on the lower surface 152 side of the bottom rail 150, the design is poor. On the other hand, since the winding shaft 13 is exposed from the top surface 151 of the bottom rail 150 at the closed cylindrical portion 16 , the design is excellent. It can be performed from the side of 151, and workability is improved. For example, when performing a rotation operation on the side of the bottom surface 152, an inconvenient operation such as turning the bottom surface 152 of the bottom rail 150 upward U is required.

Although preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and includes all aspects included in the concept of the present invention and the scope of claims. Moreover, each configuration may be selectively combined as appropriate so as to achieve at least part of the above-described problems and effects. Further, for example, the shape, material, arrangement, size, etc. of each component in the above embodiment may be appropriately changed according to the specific usage of the present invention.

In the above-described embodiment, the lift cord 140 has the front lift cord 141 and the rear lift cord 142, but the form of the lift cord 140 is not limited to this and may be another form. . For example, the lifting cord 140 may be an intermediate lifting cord 143 that hangs down from the central portion of the head box 110 in the front-rear direction FB. FIG. 10 is a side view of another form of horizontal blind device 100A. The intermediate lifting cord 143 passes from the head box 110 through an opening (not shown) formed in the center of the slat 160 in the front-rear direction FB, and passes through the winding shaft 13 mounted in the bottom rail 150 along the axis x. It is fixed from the upper side U along. In addition, the slat 160 is placed on the connecting thread group 133 .

The intermediate lifting cord 143 has its lower end inserted through the hole 16c in the closed cylindrical portion 16 of the winding shaft 13 to form a knot 143a. By forming the knot 143 a , the intermediate lifting cord 143 does not come off from the winding shaft 13 . The "knot 143a" is a knob formed by tying the lower ends of the intermediate lifting cords 143 together. The knot 143a of the intermediate lifting cord 143 is a portion thicker than the portion of the intermediate lifting cord 143 other than the knot 143a.

The winding shaft 13 to which the intermediate lifting cord 143 is attached is inserted into the shaft support member 12 from the side of the cylindrical wall portion 12a, the front ladder cord 131 and the rear ladder cord 132 are attached to the winding shaft 13, and the winding is performed. The shaft support member 12 with the shaft 13 attached thereto is attached to the bottom base 11 . The front ladder cord 131 and the rear ladder cord 132 are drawn out from the guide recess 11 f of the bottom base 11 , and the shaft support member 12 and the winding shaft 13 of the height adjustment device 1 are inserted into the accommodation hole 153 of the bottom rail 150 . Then, the bottom base 11 is fixed to the bottom rail 150 with screws. When adjusting the height position of the bottom rail 150 by the height adjusting device 1, the intermediate lifting cord 143 can be retracted into the groove portion 16b. As a result, the lifting cord 140 does not interfere with the access of the tool to the groove 16a.

Further, in the above-described embodiment, the flange portion 15 of the take-up shaft 13 is provided with four engaging protrusions 15a, but five or more engaging protrusions 15a may be provided. As a result, the winding amounts of the front ladder cord 131 and the rear ladder cord 132 can be adjusted more finely, and the lower limit position of the bottom rail 150 can be finely adjusted.

In the above-described embodiment, the knots 131a and 132a are formed at the lower ends of the front ladder cord 131 and the rear ladder cord 132. The thickness of the lower end of the side ladder cord 132 may be increased.

Reference Signs List 1 height adjustment device 11 bottom base 11a front surface 11b back surface 11c through hole 11d outer wall portion 11e accommodation recess portion 11f guide recess portion 11g inner wall portion 11h protrusion 11i region 11j contact surface 12 shaft support Member 12a cylindrical wall portion 12b fixed portion 12bl left fixed portion 12br right fixed portion 12c slit 12d guide space 12e guide holding portion 12f guide hole portion 12g locking recess 12h upper end 13
Winding shaft 14 Cylindrical portion 15 Flange portion 15a Engagement convex portion 15b Peripheral surface 16
closed cylindrical portion 16a, 16b groove portion 16c hole portion 17 winding cylindrical portion 17a outer peripheral surface 18 hole portion 18a insertion portion large hole portion 18b small hole portion engaging portion 20 engaging portion 100 , 100A horizontal blind device, 110 head box, 120 operation cord, 130 ladder cord, 131 front ladder cord, 131a knot, 132 rear ladder cord, 132a knot, 133 connecting thread group, 140 lifting cord, 141 front lifting cord, 141a knot , 142 rear lifting cord, 142a knot, 143 intermediate lifting cord, 143a knot, 150 bottom rail, 151 upper surface, 152 lower surface, 153 accommodation hole, 154 small accommodation hole, 155 large accommodation hole, 160 slat, LR longitudinal direction , L left side, R right side, FB front-back direction, B rear side, F front side, UD height direction, U upper side, D lower side, S interval, W ₁ , W ₂ interval, x axis

Claims (3)

A bottom rail height adjustment device for a horizontal blind, comprising:
a winding shaft around which the ladder cord is wound;
a shaft support member that rotatably supports the winding shaft;
a bottom base attached to the bottom rail configured to non- rotatably support the shaft support member ;
The shaft support member has a pair of guide spaces that communicate between the outside and the inside of the shaft support member , and has a holding portion that holds the lifting cord on the side of the pair of guide spaces. and height adjustment device. each of the pair of guide spaces of the shaft support member is a recess formed at one end of the shaft support member and recessed toward the other side;
2. The height adjustment device according to claim 1, wherein said one side of said shaft support member is supported by said bottom base. An engaging portion that can be engaged with each other is provided between the winding shaft and the shaft support member, and the engaging portion has at least a pair of a convex portion and a concave portion. 3. The height adjusting device according to claim 1 , wherein the portion is a portion that protrudes in a direction intersecting the winding shaft , and the recess is a portion that is recessed so as to accommodate the protrusion.

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