JP2017110462A - Horizontal blind - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a horizontal blind that enables angles of upper and lower slat groups to be differently adjusted.SOLUTION: A horizontal blind has an angle changeover mechanism, which implements a lift operation and a lift-cancelling operation of a lower-stage slat group by drawing in or out a changeover cord whose one end can support the lower-stage slat group and the other end is passed through a head box. The horizontal blind also has either one of following structures: (1) when a lifting operation cord is operated in a lifted state of the lower-stage slat group, the lifted state is cancelled; (2) operation of the lifting operation cord is restricted and lifting up or down operation of the slat group is disabled in the lifted state of the lower-stage slat group.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a horizontal blind that rotates and rotates a rotating shaft to adjust the slats and adjust the angle.

  Conventionally, a lifting mechanism that lifts and lowers the slats by rotating and driving the rotating shaft to wind or rewind the lifting code, and an angle for rotating the slat group via the ladder cord based on the rotation of the rotating shaft There is a horizontal blind with an adjustment mechanism. For example, in the horizontal blind described in Patent Document 1, when the slat is lifted or lowered, the slat is turned based on the rotation of the rotating shaft, and at the same time, the slat is raised or lowered, and the slat is turned almost fully closed. After that, the slats are moved up and down in a state in which further rotation of the slats in the same direction is prevented.

JP 2010-150842 A

  However, in the configuration described in Patent Document 1, since all the slats rotate simultaneously, the upper slat group and the lower slat group cannot be adjusted at different angles.

  The present invention has been made in view of such circumstances, and provides a horizontal blind that can adjust the angle of upper and lower slats at different angles in a horizontal blind that rotates and rotates a rotary shaft to adjust the angle and adjust the angle of the slat. To do.

According to the present invention, a head box, a slat group having an upper slat group and a lower slat group disposed below the upper slat group, and a slat group suspended from the head box, the slat group being rotatable. A slat support cord for supporting, a lifting cord for lifting and lowering the slat group, a lifting shaft housed in the head box and winding and rewinding the lifting cord by rotation, and a lifting operation for rotating the lifting shaft The lower slat group by pulling in or discharging a switching cord that is capable of supporting the lower slat group on one end side and passed through the head box on the other end side. A horizontal blind is provided that includes an angle switching mechanism that releases lifting and further includes one of the following configurations. It is.
(1) A configuration in which the lifted state is released when the lifting operation cord is operated while the lower slat group is lifted.
(2) A configuration in which the operation of the elevating operation cord is restricted in the lifted state of the lower slat group, and the elevating operation of the slat group is disabled.

  According to the present invention, since the angle switching mechanism is configured to operate in accordance with the operation of the lifting / lowering operation code, interference between the switching operation and the lifting / lowering operation is suppressed, and operability can be improved.

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

Preferably, the angle switching mechanism is connected to the other end of the switching cord and operates within the head box to lift and release the switching cord, and to lift the lifting member A switching operation unit that is operated in the head box.
Preferably, a stopper that restricts the weight drop of the slat group by restricting rotation of the lifting shaft is provided, and the lifting member is a switching shaft that lifts and releases the switching cord by rotation, and the switching When the shaft winds the switching cord, the lifting shaft and the switching shaft are connected to restrict the rotation of the switching shaft by the stopper, and when the lifting operation cord is operated in the lifted state, the regulation by the stopper Is released and the suspended state is released.
Preferably, when the connection between the elevating shaft and the switching shaft is released, the suspended state is released by the weight of the slat.
Preferably, in the suspended state, the lifting operation of the slat group by the lifting operation cord is prohibited.
Preferably, when the slat lowering operation by the lifting operation cord is performed in the lifted state, the restriction by the stopper is released and the lifted state is released.
Preferably, the angle switching mechanism includes an engaging portion that rotates in conjunction with the rotation of the switching shaft, and an engaged portion that rotates in conjunction with the lifting shaft, and with the rotation of the front switching shaft. The engaging portion is coupled to the engaged portion by moving in the axial direction while rotating.
Preferably, a stopper for restricting the weight drop of the slat group by restricting the rotation of the elevator shaft is provided, and the elevator shaft cannot be rotated when the lower slat group is lifted.

It is a figure which shows the horizontal blind concerning 1st Embodiment of this invention, (a) is a front view, (b) is a side view. It is a principal part expanded sectional view of the switching operation part of the horizontal blind of FIG. It is a disassembled perspective view of the switching operation part of FIG. It is the disassembled perspective view which looked at the switching operation part of FIG. 2 from the other angle. FIG. 3 is a development view of a guide groove of a fixed drum of the switching operation unit in FIG. 2. It is AA sectional drawing of FIG. It is a figure which shows the structure of the transmission shaft of a switching operation part of FIG. 2, and a connection shaft, (a) is a perspective view, (b) is explanatory drawing which shows meshing | engagement of protrusion parts. It is BB sectional drawing of FIG. It is a figure which shows the state which has not lifted the lower slat group of the switching operation part of FIG. 2, (a) is sectional drawing of a switching operation part, (b) is a figure which shows the state of the spherical body on a guide groove. It is a figure which shows the state which lifted the lower slat group of the switching operation part of FIG. 2, (a) is sectional drawing of a switching operation part, (b) is a figure which shows the state of the spherical body on a guide groove. It is a table | surface which shows whether the relative rotation between each member of the switching operation part of FIG. 2 is controlled or permitted. It is the schematic which looked at the horizontal blind of FIG. 1 from the side, (a) is a full open state, (b) is a reverse fully closed state, (c) shows a fully closed state. It is the schematic which looked at the horizontal blind of FIG. 1 from the side, (a) shows an upper open and closed state, (b) shows an upper closed and open state. It is the schematic which shows the horizontal blind concerning 2nd Embodiment of this invention. It is the schematic which shows the horizontal blind concerning 3rd Embodiment of this invention. It is the schematic which shows the horizontal blind which concerns on 4th Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described. Various characteristic items shown in the following embodiments can be combined with each other. The invention is established independently for each feature.

(First embodiment)
(1) Description of Configuration (1-1) Overall Configuration of Horizontal Blind The horizontal blind according to the first embodiment of the present invention shown in FIG. 1 includes a plurality of ladder cords 2 (slat support cords) suspended from the head box 1. ) Supports a slat group 3 including a plurality of slats 3 a, and a bottom rail 4 is supported on the lower end of the ladder cord 2. The slat group 3 includes an upper slat group and a lower slat group 3L disposed below the upper slat group 3U.

  In the vicinity of the ladder cord 2, a plurality of lifting cords 5 are suspended from the head box 1, and the upper end portion of the lifting cord 5 is wound around a lifting cord winding cone 7 disposed in the head box 1. The lower end is connected to the bottom rail 4.

  And the horizontal blind of this embodiment switches the angle of the raising / lowering mechanism M1 which raises / lowers the slat group 3, the angle adjustment mechanism M2 which adjusts the angle of the slat group 3 to a predetermined angle, and the lower slat group 3L of the slat group 3. And an angle switching mechanism M3. Hereinafter, each of these mechanisms will be described.

(1-2) Elevating mechanism M1
The elevating mechanism M1 operates the above-described plurality of elevating cords 5 and elevating cord winding cones 7, the elevating shaft 6 that rotates each elevating cord winding cone 7 in conjunction with each other, and the endless loop elevating operation cord 8. It is comprised from the raising / lowering operation part 9 which rotates the raising / lowering axis | shaft 6, and the stopper 10 which regulates rotation of the raising / lowering axis | shaft 6. FIG.

  The lifting operation unit 9 and the stopper 10 are provided in the vicinity of one end 1a in the longitudinal direction in the head box 1 (the right end in FIG. 1A). In the present embodiment, for example, disclosed in JP-A-7-279558. Such a known configuration is applied.

When the lifting / lowering mechanism M1 operates the lifting / lowering operation cord 8 from the state shown in FIG. 1 in the lifting / lowering cord winding direction RW of the slat group 3, the pulley 11 around which the lifting / lowering operation cord 8 is wound rotates. With the rotation, the lifting shaft 6 rotates via the lifting operation unit 9. Then, as the elevating shaft 6 rotates, the elevating cord 5 is taken up by the elevating cord winding cone 7 and the slat group 3 is raised. On the other hand, when operating the lifting / lowering operation cord 8 in the lifting / retracting cord rewinding direction RU of the slat group 3, the lifting / lowering shaft 6 rotates in the opposite direction, and the lifting / lowering cord 5 is rewound from the lifting / lowering cord winding cone 7, so 3 goes down.
In the following description, the direction in which the elevating shaft 6 rotates when the slat group 3 is wound is defined as the elevating cord winding direction RW, and the direction in which the elevating shaft 6 rotates when the slat group 3 is rewound is defined as the elevating cord. This is called the rewind direction RU.

Further, if the operation of the lifting operation cord 8 is stopped, the stopper 10 described above restricts the rotation of the lifting shaft 6 so that the weight of the slat group 3 is prevented from dropping, and the slat group 3 is suspended and supported at a desired position. The
In the elevating mechanism M1 as described above, the elevating shaft 6 can be rotated only when the elevating operation cord 8 is operated by the action of the stopper 10, in other words, the elevating shaft 6 is not operated unless the elevating operation code 8 is operated. It does not rotate.

(1-3) Angle adjustment mechanism M2
The angle adjusting mechanism M2 includes a plurality of ladder cords 2 (see FIG. 1B) formed by a pair of front and rear warp yarns 2a and 2b and a plurality of weft yarns 2c that support each slat, and each lifting cord winding cone. 7 and a suspension member (not shown) provided to suspend and support the ladder cord 2.

  The angle adjusting mechanism M2 rotates the suspension member with the rotation of the elevating shaft 6, and moves one of the pair of warp yarns up and down relatively with respect to the other, thereby setting the angle of the slat group 3 to a predetermined angle. For example, a known configuration as disclosed in JP 2010-150842 A is applied.

  The angle adjusting mechanism M2 will be briefly described. In the fully open state (see FIGS. 1 and 12A) in which the slat group 3 is not rotated in the vertical direction, the friction between the suspension member and the lifting shaft 6 can be described. Sufficient force is secured, and the suspension member is rotated with the rotation of the lifting / lowering cord winding cone 7 in the lifting / lowering cord winding direction RW. Therefore, the slat group 3 is rotated by the operation of the raising / lowering operation cord 8 and is in a reverse fully closed state (FIG. 12B) in which the convex surface is the indoor side. And when the slat group 3 is rotated to a substantially vertical direction, a diameter of a suspension member will be expanded and the frictional force between a suspension member and the raising / lowering shaft 6 will become small. As a result, the elevating shaft 6 rotates while spinning around the suspension member, the elevating cord 5 is wound around the elevating cord winding cone 7 and the slat group 3 is raised.

  On the other hand, when the elevating shaft 6 is rotated in the elevating cord rewinding direction RU, the hanging member is rotated together with the elevating cord rewinding direction RU of the elevating cord winding cone 7, and the slat group 3 has a convex surface on the outdoor side. The fully closed state (see FIG. 12C). And when the slat group 3 is rotated to a substantially perpendicular direction, a suspension member will be diameter-expanded and the frictional force of a suspension member and the raising / lowering shaft 6 will become small. As a result, the elevating shaft 6 rotates while spinning around the suspension member, the elevating cord 5 is rewound onto the elevating cord winding cone 7, and the slat group 3 is lowered.

  Note that the above configuration switches between interlocking and non-interlocking of the rotation of the lifting shaft 6 and the operation of the ladder cord 2 by using a change in frictional force between the suspension member and the lifting shaft 6. The shaft 6 and the suspension member are configured to rotate integrally, and the rotation of the lifting shaft 6 and the ladder are utilized by utilizing the change in the frictional force between the suspension member and the ladder cord 2 caused by the load acting on the ladder cord 2. It is also possible to switch between interlocking and non-interlocking of the operation of the code 2. In this configuration, during the opening / closing operation of the slat group 3, the rotation of the elevating shaft 6 and the operation of the ladder cord 2 are interlocked by the frictional force between the suspension member and the ladder cord 2, so that the slat group 3 is fully closed or reversed fully. After being turned to the closed state, the elevating shaft 6 and the ladder cord 2 are not interlocked by reducing the frictional force.

(1-4) Angle switching mechanism M3
The angle switching mechanism M3 includes a plurality of switching cords 20 that support the lower slat group 3L on one end side and are passed through the head box 1 on the other end side, and a switch that is housed in the head box 1 and winds the switching cord 20 The cord winding cone 21 includes a switching shaft 22 that rotates the switching cord winding cones 21 in conjunction with each other, and a switching operation unit 24 that rotates the switching shaft 22 by operating the switching operation cord 23.

  Each switching cord 20 is pulled out from the head box 1, and a lower end as one end thereof is connected to a warp 2 a on the indoor side of the ladder cord 2 through a cord joint 25. In the present embodiment, the lower slat group 3L is defined as the slat 3 below the connecting portion. Further, the switching cord 20 is knitted to the weft 3c of the slat 3a of each stage of the upper slat group 3U. This weaving may be performed at every step or at any number of steps such as every two steps or every three steps. Then, the upper end portion side of the switching cord 20 is introduced into the head box 1 and wound around the switching cord winding cone 21 as shown in FIG.

  The switching cord winding cone 21 is a substantially cylindrical member having an outer surface formed in a taper shape, and penetrates the switching shaft 22 so as not to be relatively rotatable, and rotates and switches in accordance with the rotation of the switching shaft 22 in one direction. The lower slat group 3L can be lifted by winding the cord 20 in a spiral shape (see FIG. 13). In the state where the lower slat group 3L is lifted, the switching cord 20 is pulled downward by the weight of the lower slat group 3L, and in the state where the switching cord winding cone 21 and the switching shaft 22 are allowed to rotate, the switching cord 20 is pulled. Is unwound and lifting of the lower slat group 3L is released.

  The switching shaft 22 is a shaft having a polygonal cross section extending in the longitudinal direction in the head box 1 (for example, a regular hexagon), and the switching cord winding cones 21 described above are attached so as not to be relatively rotatable. The switching shaft 22 is rotated by the operation of the switching operation unit 24 and the rotation of the switching cord winding cone 21 due to the weight of the lower slat group 3L. Below, the switching operation part 24 is demonstrated in detail using FIGS.

  As shown in FIG. 2, the switching operation unit 24 is provided in the vicinity of the other end 1b in the longitudinal direction on the opposite side of the lifting operation unit 9 and the stopper 10 in the head box 1 (left end in FIG. 1A). The elevating shaft 6 and the switching shaft 22 are connected to each other. The switching operation unit 24 includes a case 50 fixed to the head box 1, a fixed drum 41, a pulley 42, a rotating shaft 43, a large gear 44 and a small gear 45 disposed therein, and a transmission shaft as an engaging unit. 46, a connecting shaft 47 and a shaft shaft 48 are provided as engaged portions. A clutch spring 43s is wound around the rotary shaft 43. In addition, a switching operation cord 23 is wound around the pulley 42, and a grip 23a is attached to a tip portion of the switching operation cord 23 ( (See FIG. 1).

  In the following description, with respect to the longitudinal direction, one end 1a side and the other end 1b side of the head box 1 are simply referred to as one end 1a side and the other end 1b side, and these directions are referred to as one end 1a direction and the other end 1b direction. Called.

<Case>
As shown in FIGS. 2 and 3, the case 50 includes an upper case 50t and a lower case 50b. The case 50 has a substantially cylindrical space that accommodates each member therein. The switching operation unit 24 is configured by assembling the case 50t and the lower case 50b. In FIG. 3, only the lower case 50b is assigned to each structure, but the upper case 50t has the same configuration unless otherwise specified.

  The case 50 has a wall 51 at the end on the other end 1b side, and rectangular recesses 51t and 51b in the upper case 50t and the lower case 50b, respectively. Similarly, the end portion on the one end 1a side has a wall portion 58, and the upper case 50t and the lower case 50b have semicircular recesses 58t and 58b, respectively.

  Between the wall portion 51 and the wall portion 58, a pulley housing portion 52 for housing the pulley 42, a gear housing portion 54 for housing the large gear 44, and an inner diameter in order from the other end 1b side to the one end 1a side. A narrowed diameter portion 53, a transmission shaft accommodating portion 56 that slidably accommodates the transmission shaft 46, and a one-way mechanism accommodating portion 59 that accommodates a one-way mechanism 49 constituted by the connecting shaft 47 and the shaft shaft 48. Is formed.

  In addition, a small gear accommodating portion 55 for accommodating the small gear 45 is formed in the upper case 50t, and through holes 51h and 58h through which the switching shaft 22 passes are formed in the wall portions 51 and 58 on the upper case 50t side. Yes. Also, through holes 55 h are provided on both axial sides of the small gear housing 55.

<Fixed drum>
The fixed drum 41 is a cylindrical member extending in the longitudinal direction as shown in FIGS. 2 to 4, and is slightly larger than the thick shaft portion 41 b on the thick shaft portion 41 b and the one end 1 a side of the thick shaft portion 41 b. A thin shaft portion 41s having a small diameter is provided. An engagement groove 41d that engages with the recesses 51t and 51b of the case 50 is provided on the side surface in the vicinity of the end of the thick shaft portion 41b on the other end 1b side. An endless guide groove 61 shown in FIG. In the development view of FIG. 5, the right side is one end 1a and the left side is the other end 1b side. The configuration of the guide groove 61 will be described later. Further, a sliding hole 41h for inserting a cylindrical portion 46t of a transmission shaft 46 described later is provided on the one end 1a side of the fixed drum 41.
<Pulley>

  The pulley 42 has a substantially cylindrical switching cord winding portion 42w having a winding groove formed over the outer peripheral surface, and an arcuate engaging portion 42e protruding from the switching cord winding portion 42w in the direction of the one end 1a. With. In addition, the inner diameter of the switching cord winding portion 42 w is slightly larger than the outer diameter of the thick shaft portion 41 b of the fixed drum 41.

  A switching operation code 23 (see FIG. 1) is wound around the switching code winding unit 42w, and the switching operation code 23 is led out of the case from a switching code deriving unit 52l of the case 50. Pulling up the grip 23 a attached to the tip of the switching operation cord 23 causes the pulley 42 to rotate.

<Rotating shaft>
The rotating shaft 43 includes a cylindrical portion 43t on the other end 1b side, a flange portion 43f formed on the one end 1a side of the cylindrical portion 43t, and two meshing portions 43m protruding from the flange portion 43f in the one end 1a direction. Thus, the inner diameter of the rotating shaft 43 is slightly larger than the outer diameter of the thin shaft portion 41 s of the fixed drum 41. The meshing portions 43m are each formed in a range of about 90 degrees in the circumferential direction, and the two meshing portions 43m are opposed to each other by 180 degrees.

<Large gear / Small gear>
The large gear 44 includes a partial cylindrical portion 44t having a shape in which a part of the side surface of the cylinder is missing on the other end 1b side, and gear teeth 44g continuous in the circumferential direction on the one end 1a side of the partial cylindrical portion 44t. It has. The lacking part of the partial cylindrical portion 44t is an engaged portion 44e that engages with the engaging portion 42e of the pulley 42.

  A small gear 45 having gear teeth 45g configured to mesh with the gear teeth 44g is disposed on the upper portion of the large gear 44. And the small gear 45 is provided with the square hole 45h penetrated to a longitudinal direction, and the switching shaft 22 can be inserted in this square hole 45h so that relative rotation is impossible. In the present embodiment, since the large gear 44 and the small gear 45 are assembled as described above, the large gear 44, the pulley 42 that rotates in the same direction as the large gear 44, and the switching shaft 22 that rotates integrally with the small gear 45. Will rotate in the opposite direction. The gear ratio between the large gear 44 and the small gear 45 is larger than 2: 1, and the lower slat group 3L can be lifted with a small operation force by the operation described below.

<Transmission shaft>
The transmission shaft 46 is disposed on the outer side of the cylindrical portion 46t having an outer diameter slightly smaller than the inner diameter of the sliding hole 41h of the fixed drum 41, and is larger than the outer diameter of the sliding hole 41h. It is comprised from the meshing part 46m which has a slightly large internal diameter, and the cylindrical part 46t and the thin-shaft cylindrical thick shaft part 46b formed in the one end 1a side of the meshing part 46m.

  The meshed portion 46m is configured so that two meshed portions 46m formed in a range of about 90 degrees in the circumferential direction face each other with a spacing of 180 degrees, like the rotary shaft 43 described above. It meshes with the portion 43m. Further, as shown in the cross-sectional view of FIG. 6, the steel spheres 46m1 are respectively locked on the inner peripheral surfaces of the two meshed portions 46m so as not to move relative to the meshed portions 46m, and only rotate. A locking hole 46m2 is provided.

  The spherical body 46m1 is positioned on the guide groove 61 of the fixed drum 41 when the switching operation unit 24 is assembled. When the transmission shaft 46 rotates with respect to the fixed drum 41, the spherical body 46m1 rotates and rotates around the guide groove 61. It is supposed to be.

  On the other hand, on the one end 1a side of the thick shaft portion 46b, as shown in the enlarged perspective views of FIGS. 4 and 7, a plurality of (for example, eight) protrusions extending at equal intervals from the inner peripheral surface 46i toward the center. 46p, and a substantially sector-shaped locking space 46r is formed by the protrusion 46p and the inner peripheral surface 46i.

<Connection shaft>
The connecting shaft 47 includes a disk part 47d having a through hole 47h at the center, and the same number of protrusions 47p as the protrusions 46p protruding from the disk part 47d toward the other end 1b. Further, on the surface of the disk portion 47d on the one end 1a side, as shown in the BB cross-sectional views of FIGS. 4 and 8, the circumferential groove 47c formed in the circumferential direction and the radial direction of the circumferential groove 47c. It has many (for example, 30 places) 47 g of locking grooves formed in the outer side.

<Shaft shaft>
The shaft 48 includes a thin shaft portion 48s on the other end 1b side, a thick shaft portion 48b on the one end 1a side of the thin shaft portion 48s, and a flange portion 48f on the one end 1a side of the thick shaft portion 48b. The outer diameter of the thin shaft portion 48 s is slightly larger than the inner diameter of the cylindrical portion 46 t of the transmission shaft 46, and the transmission shaft 46 can slide in the axial direction with respect to the shaft shaft 48. Further, the outer diameter of the thick shaft portion 48 b is slightly smaller than the through hole 47 h of the connecting shaft 47.

  On the other hand, on the surface on the other end 1b side of the flange portion 48f, six oval accommodating grooves 48g for disposing the clutch balls 49b are provided at equal intervals along the circumferential direction. Then, when the coupling shaft 47 is fitted to the thick shaft portion 48b in a state where the clutch ball 49b is disposed in the housing groove 48g, the clutch ball 49b is moved into the housing groove 48g of the shaft shaft 48 as shown in the sectional view of FIG. And the circumferential groove 47 c of the connecting shaft 47. In this way, the one-way mechanism 49 is configured by the connecting shaft 47, the shaft shaft 48, and the clutch ball 49b.

  The one-way mechanism 49 restricts rotation in one direction of the shaft shaft 48 relative to the connecting shaft 47 and allows rotation in the other direction. Specifically, when the shaft shaft 48 rotates in the direction of arrow X in FIG. 8 with respect to the connecting shaft 47, the clutch ball 49b moves radially outward along the housing groove 48g, The shaft shaft 48 is restricted from rotating in the direction of the arrow X by being locked in the locking groove 47g. On the other hand, when the shaft shaft 48 rotates in the direction of the arrow Y with respect to the connecting shaft 47, the clutch ball 49b moves to the center side in the radial direction along the receiving groove 48g. The rotation in the Y direction is allowed. However, when the shaft 48 rotates in the direction of arrow Y with respect to the connecting shaft 47, the connecting shaft 47 also rotates slightly in the direction of arrow Y.

  In addition, the shaft shaft 48 is provided with a square hole 48h that opens to the one end 1a side, and the shaft shaft 48 and the lift shaft 6 are fixed so that they cannot rotate relative to each other when the lift shaft 6 is inserted. It is like that.

(1-5) Assembly of switching operation unit To assemble the switching operation unit 24 including the above-described components, first, as shown in FIGS. Next, the rotary shaft 43 and the large gear 44, which are positioned at the portion 41b and attached with the clutch spring 43s, are inserted in this order. At this time, the other end surface 43c of the cylindrical portion 43t of the rotating shaft 43 is brought into contact with the stepped portion 41e formed between the thick shaft portion 41b and the thin shaft portion 41s of the fixed drum 41 and the contact surface 42c of the pulley 42. Touch. Further, the engaging portion 42e of the pulley 42 and the engaged portion 44e of the large gear 44 are engaged, and the flange portion 43f of the rotating shaft 43 and the step portion 44s of the large gear 44 abut.

  Further, at this time, as shown in FIG. 2, the clutch spring 43s has an outer peripheral surface of the cylindrical portion 43t of the rotating shaft 43, an inner periphery of the engaging portion 42e of the pulley 42, and an engaged portion 44e of the large gear 44. Sandwiched between the surface. When the large gear 44 and the pulley 42 rotate relative to the rotating shaft 43 in the pulling-down direction of the switching operation cord 23, the clutch spring 43 s expands to the large shaft 44 and the pulley 42 with respect to the rotating shaft 43. When the pulley 42 and the large gear 44 rotate relative to each other in the winding direction of the switching operation cord 23, the spring is wound and the pulley and the large gear 44 and the rotary shaft 43 rotate integrally. Yes.

  Next, clutch balls 49b are arranged in the respective housing grooves 48g of the shaft shaft 48 (see FIG. 8), and the connecting shaft 47 is inserted into the thick shaft portion 48b of the shaft shaft 48 from the other end 1b side. The transmission shaft 46 is inserted into the thin shaft portion 48s from the other end 1b side.

  Then, the transmission shaft 46, the coupling shaft 47, and the shaft shaft 48 that are integrated with each other are inserted into the sliding hole 41h of the fixed drum 41 by the cylindrical portion 46t of the transmission shaft 46, and the fixed drum 41 to the shaft that are integrated. The shaft 48 is assembled to the lower case 50b of the case 50 in this state (see FIG. 3). Finally, the switching operation unit 24 is configured by covering the upper case 50t with the small gear 45 engaged with the upper portion of the large gear 44.

  By the way, when the fixed drum 41 is assembled to the case 50, the engagement groove 41d of the fixed drum 41 is engaged with the recesses 51t and 51b of the upper case 50t and the lower case 50b as shown in FIG. On the other hand, it is fixed so that rotation and axial movement are impossible.

  Further, the switching cord winding portion 42w, the large gear 44, and the transmission shaft 46 of the pulley 42 are housed in the pulley housing portion 52, the gear housing portion 54, and the transmission shaft housing portion 56 of the lower case 50b, respectively. A one-way mechanism 49 constituted by the shaft 48 is accommodated in the one-way mechanism accommodating portion 59. At this time, the switching cord winding portion 42w of the pulley 42 is sandwiched between the wall portion 51 on the other end 1b side and the step portion 52s (see FIG. 3) on the one end 1a side, and the large gear 44 is sandwiched between the pulley 42 and the case 50. The one-way mechanism 49 is sandwiched between the stepped portion 59s (see FIG. 4) and the wall portion 58, and cannot be moved in the axial direction.

  Accordingly, the pulley 42, the large gear 44, the transmission shaft 46, the connecting shaft 47, and the shaft shaft 48 are immovable in the axial direction with respect to the case 50, and the rotating shaft 43 sandwiched between the pulley 42 and the large gear 44 is also included. Immovable in the axial direction. Therefore, in the case 50, only the transmission shaft 46 is allowed to move in the axial direction.

  On the other hand, each member 42 to 48 in the case is allowed to rotate around an axis extending in the longitudinal direction. In the following description, when the switching cord 20 is wound up and the lower slat group 3L is lifted, in other words, the direction in which the members 42 to 48 rotate when the switching operation cord 23 is pulled down is referred to as the switching cord winding direction SW. To do. Here, the rotation of the small gear 45 and the switching shaft 22 and the other members rotate in the opposite directions. On the other hand, the direction in which the members 42 to 48 rotate when the switching cord 20 is rewound to release the lifting of the lower slat group 3L is referred to as a switching cord unwinding direction SU.

  The one-way mechanism 49 is assembled so that the direction of the arrow X in FIG. 8 is the switching cord rewinding direction SU and the direction of the arrow Y is the switching cord winding direction SW. The relative rotation of the shaft shaft 48 in the switching code winding direction SW with respect to the shaft 46 is restricted, and the relative rotation of the shaft shaft 48 in the rewinding direction SU is allowed.

  Further, when the pulley 42, the rotating shaft 43 and the large gear 44 are inserted into the fixed drum 41, they can be accommodated in the lower case 50b, and then the transmission shaft 46, the connecting shaft 47 and the shaft shaft 48 can be assembled.

  In order to construct the horizontal blind by assembling the switching operation unit 24 assembled as described above to the head box 1, the lifting / lowering shaft 6 around which the lifting / lowering cord 5 is wound via the lifting / lowering cord winding cone 7 is used as the shaft. The switching shaft 22 into which the switching cord 20 is wound through the switching cord winding cone 21 is inserted into the square hole 48h of the shaft 48, and the corners of the through holes 51h, the through holes 55h and 58h of the case 50, and the small gear 45. What is necessary is just to insert in the hole 45h and arrange | position to the other end 1b side of the head box 1. The lifting shaft 6 and the shaft shaft 48 are connected so that the switching cord winding direction SW of the shaft shaft 48 and the lifting code winding direction RW of the lifting shaft 6 coincide.

(2) Explanation of operation Next, with respect to the operation of the horizontal blind having the above-described configuration, particularly the switching operation by the switching operation unit 24, FIGS. 5 to 11 showing the switching operation unit and FIGS. This will be described with reference to FIG.

(2-1) Lifting of Lower Slat Group When the lower slat group 3L is not lifted, that is, in the state shown in FIG. 12 (a), the switching operation cord 23 is wound around the pulley 42 (pre-wound). It is in a state. At this time, as shown in FIG. 9A, the transmission shaft 46 is located on the other end 1b side of the transmission shaft accommodating portion 56, and a sphere 46m1 provided on the meshed portion 46m of the transmission shaft 46. Is located in the circumferential groove 62 of the guide groove 61 as shown in FIG.

  When the grip 23a (see FIG. 1) of the switching operation cord 23 is pulled from this state, the pulley 42, the rotating shaft 43, the large gear 44, the gear 45, and the transmission shaft 46 are interlocked to rotate in the switching cord winding direction SW. . Then, the sphere 46m1 moves in the circular groove 62 from the upper side to the lower side in FIG. 5 along with the rotation of the transmission shaft 46, passes through the branch portion 63 along the arrow A, and moves in a spiral shape toward the one end 1a. It is guided to the groove 64.

  When the sphere 46m1 moves along the movement groove 64 along the arrow A, the guide groove 61 is provided on the fixed drum 41 fixed to the case 50, so that the sphere 46m1 is held in the locking hole 46m2 so as not to be relatively movable. The transmission shaft 46 moves toward the connecting shaft 47 on the one end 1a side while rotating in the transmission shaft accommodating portion 56 in the switching cord winding direction SW.

  When the sphere 46m1 reaches the vicinity of one end 1a of the moving groove 64 (see FIG. 10B), the transmission shaft 46 and the connection shaft 47 are connected to the engaging space 46r of the transmission shaft 46 shown in FIG. Since the protrusion 47p is fitted, the transmission shaft 46 and the connecting shaft 47 are interlocked with each other by the engagement of the protrusion 46p and the protrusion 47p (see FIGS. 10A and 11B).

  When the transmission shaft 46 approaches the connecting shaft 47, the opposing surface 46p1 of the protruding portion 46p of the transmitting shaft 46 and the opposing surface 47p1 of the protruding portion 47p of the connecting shaft 47 abut against each other. There is a possibility that the protruding portion 47p of the connecting shaft 47 cannot be fitted into the stop space 46r.

  However, in the present embodiment, as shown in FIG. 7B, the opposing surface 46p1 of each protrusion 46p is inclined so as to be lowered toward the switching cord rewinding direction SU, and the opposing surface 47p1 of each protrusion 47p. Is inclined so as to be lowered toward the switching cord winding direction SW, and the connecting shaft 47 can be rotated with respect to the transmission shaft 46 in the switching cord rewinding direction SU by the one-way mechanism 49. Therefore, when the facing surface 46p1 of the protruding portion 46p and the facing surface 47p1 of the protruding portion 47p hit each other, the hitting force causes the connecting shaft 47 to rotate relative to the transmission shaft 46 in the switching cord rewinding direction SU. Thus, the projecting portion 47p of the connecting shaft 47 can be fitted into the locking space 46r of the transmission shaft 46.

  Now, when the switching operation cord 23 is further pulled down while the transmission shaft 46 and the coupling shaft 47 are interlocked, the coupling shaft 47 will rotate in the switching cord winding direction SW with respect to the shaft shaft 48 as the pulley 42 rotates. And However, since the rotation of the shaft 6 connected to the shaft 48 is restricted by the stopper 10 and is not allowed to rotate, the shaft 48 is rotated to mesh with the connection shaft 47 and the transmission shaft 46 and the transmission shaft 46. The shaft 43 can no longer rotate in the switching cord winding direction SW.

  Therefore, the pulley 42 and the gear 45 are idled with respect to the rotating shaft 43 by expanding the spring of the clutch spring 43s described above (see FIG. 11A). Only the gear 44, the small gear 45, the switching shaft 22 and the switching cord winding cone 21 rotate in the switching cord winding direction SW.

  Accordingly, by pulling down the switching operation cord 23 by an arbitrary amount in this state, the switching cord 20 can be wound up by an arbitrary amount, and as shown in FIG. The angle can be adjusted by lifting it to the position.

  When this lifting operation is performed when the slat group 3 is in the open state (see FIG. 12C), the upper slat group 3U is in the open state and the lower slat group 3L is in the fully closed state. When the operation is performed when 3 is in the reverse fully closed state, as shown in FIG. 13B, the upper slat group 3U is in the reverse fully closed state, and the lower slat group 3L is in the open state.

  Thereafter, when the lowering of the switching operation cord 23 is stopped and the grip 23a is released, the switching cord 20 is pulled downward by the weight of the lower slat group 3L, and accordingly, the switching cord winding cone 21, the switching shaft 22, and the small gear. 45 tries to rotate in the lifting / lowering cord rewinding direction SU. Therefore, the large gear 44 (pulley 42), the rotary shaft 43, the transmission shaft 46, and the connecting shaft 47 that are rotated together with the clutch spring 43s are also rotated in the lifting / lowering cord unwinding direction SU. However, the connecting shaft 47 cannot rotate in the lifting / lowering cord rewinding direction SU with respect to the shaft shaft 48 by the function of the one-way mechanism 49 described above (see FIG. 11A), and the shaft shaft 48 is rotated by the stopper 10. Since each of the members 42 to 48 is non-rotatable because it is connected to the elevating shaft 6 that is disabled and cannot rotate.

  Therefore, the lower slat group 3L is prevented from falling due to its own weight, and the stopper 10 of the lifting mechanism M1 also functions as a stopper of the lower slat group 3L when viewed as the entire horizontal blind.

(2-2) Lifting Cancellation of Lower Slat Group On the other hand, when lifting the lower slat group 3L, the lifting operation cord 8 (see FIG. 1) is moved so that the lifting shaft 6 rotates in the lifting cord unwinding direction RU. Manipulate. When the lifting / lowering shaft 6 rotates in the lifting / lowering cord rewinding direction RU, the shaft shaft 48 rotates in the switching cord unwinding direction SU. Then, as the shaft shaft 48 rotates, the connecting shaft 47 slightly rotates in the switching cord unwinding direction SU, so that the transmission shaft 46 fitted to the connecting shaft 47 by the projecting portions 47p and 46p is slightly switched. Rotate in direction SU. At this time, the sphere 46m1 of the transmission shaft 46 moves in the switching cord rewinding direction SU, that is, upward in FIG. 5, in the moving groove 64 of the guide groove 61 shown in FIG. Then, the sphere 46m1 moves in the direction of the other end 1b along the moving groove 64, and at the same time, the transmission shaft 46 moves in the direction of the other end 1b, and the fitting between the transmission shaft 46 and the connecting shaft 47 is released.

  When the engagement between the transmission shaft 46 and the connection shaft 47 is released, the transmission shaft 46 and the pulley 42, the rotation shaft 43, the large gear 44, the small gear 45, and the switching shaft 22 connected thereto are respectively connected to the switching cord winding. As a result, the lower slat group 3L can be lifted by its own weight. At this time, the sphere 46m1 moves from the moving groove 64 of the guide groove 61 to the rotating groove 62, and then rotates around the rotating groove 62 in the direction of arrow B in FIG.

(2-3) Restriction of Ascending Operation of Slat Group When Lifting Lower Slat Group In the state where the lower slat group 3L is lifted (the state shown in FIGS. 10 and 13), the slat group 3 by the lifting / lowering cord 5 is used. Ascending operation is regulated.

  More specifically, when the shaft shaft 48 is rotated in the switching cord winding direction SW, the one-way mechanism 49 restricts the rotation of the shaft shaft 48 with respect to the connecting shaft 47, and the connecting shaft 47 and the transmission shaft 46 are connected. Therefore, the shaft shaft 48 tends to rotate integrally with the transmission shaft 46. However, the sphere 46m1 of the transmission shaft 46 is positioned in the moving groove 64 of the guide groove 61 as shown in FIG. 10B, and the transmission cord 46 is moved in the switching cord winding direction SW unless the transmission shaft 46 moves in the direction of one end 1a. It cannot rotate (refer FIG.11 (b)). In addition, since the transmission shaft 46 is already connected to the connecting shaft 47 and cannot move further in the direction of the one end 1a, the transmission shaft 46 cannot be rotated in the switching cord winding direction SW. As a result, the shaft shaft 48 is also switched in the switching cord winding direction SW. Can not be rotated.

  Since the lifting shaft 6 and the shaft shaft 48 are connected so that the switching cord winding direction SW of the shaft shaft 48 and the lifting cord winding direction RW of the lifting shaft 6 coincide with each other, the lower slat group 3L is In the suspended state (the state shown in FIGS. 10 and 13), the lifting shaft 6 cannot rotate in the lifting cord winding direction RW, and the lifting operation of the slat group 3 by the lifting cord 5 is restricted.

(3) Operational effects In the horizontal blind as described above, the following operational effects can be obtained.
(A) The lift shaft 6 is connected to the shaft shaft 48 of the switching operation unit 24, and the transmission shaft 46 is rotated while the transmission shaft 46 is rotated, and the connection is interlocked with the shaft shaft 48. Since the shaft 47 is fitted, the lifting shaft 6 and the switching shaft 22 are connected, and the rotation of the switching shaft 22 is restricted by the stopper 10 of the lifting mechanism M1. Accordingly, the stopper 10 of the elevating mechanism M1 also functions as a stopper of the switching shaft 22, and the lifting of the lower slat group 3L is automatically released by its own weight when the elevating operation cord 8 is operated. The problem of performing the lifting / lowering operation and the lifting operation of the lower slat group 3L independently is eliminated, and the operability of the switching operation and the lifting operation is improved.
(B) In the lifting state of the lower slat group 3L (see FIGS. 13A and 13B), the lifting shaft 6 is configured not to rotate in the lifting code winding direction RW. As a result, the raising operation of the slat group 3 is restricted, and the switching cord 20 can be prevented from being loosened and entangled.

In addition, this invention can be implemented also with the following aspects.
In the above-described embodiment, the pulley 42 and the large gear 44 are configured as separate bodies in order to position the rotating shaft 43 therebetween. However, the pulley 42 and the large gear 44 may be configured as a single unit.
The configuration of the elevating mechanism M1 is not limited to that of the above embodiment, and the stopper 10 is a heart cam stopper, and the heart cam stopper regulates the weight drop of the slat group, and when the regulation is released, the slat group descends by its own weight. It may be a thing. Even in this case, when the lifting shaft 6 is fixed by the stopper 10, the shaft shaft 48 connected to the lifting shaft 6 is unable to rotate, the rotation of the switching shaft 22 is restricted, and the lower slat group 3L is lifted. Therefore, the effect according to the above embodiment can be obtained.
In the above embodiment, in the lifting state of the lower slat group 3L, the operation of the elevating operation cord 8 in the elevating cord winding direction RW of the slat group 3 is prohibited, and the operation of the elevating operation cord 8 in the elevating cord rewinding direction RU is stopped. 10 is released and the lifting state of the lower slat group 3L is released. However, even if the lifting operation cord 8 is operated in the lifting state of the lower slat group 3L, the restriction by the stopper 10 is not applied. It is good also as a structure which cannot be cancelled | released. As such a configuration, for example, a moving member that moves in the head box 1 in conjunction with the operation of the switching operation code 23 is provided. When the lower slat group 3L is lifted, the moving member engages with the lifting shaft 6; It can be set as the structure which makes the raising / lowering axis | shaft 6 unrotatable. In this example, in order to release the stopper 10, first, the switching operation cord 23 side is operated to release the engagement between the moving member and the lifting shaft 6, and then the lifting operation code 8 is operated to operate the stopper. Will be released.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG. The present embodiment is similar to the first embodiment, and hereinafter, differences will be mainly described.

  In the present embodiment, as shown in FIG. 14, the warp 2a of the ladder cord 2 is divided at a position between the upper slat group 3U and the lower slat group 3L, and the warp 2a that supports the lower slat group 3L, The switching cord 20 is connected to the warp 2a at a connection point 25 in the vicinity of the uppermost slat.

  In the first embodiment, since the maximum distance between adjacent slats is defined by the distance between the wefts 2c that support the slats 3a of each step, the distance between the adjacent slats 3a is wider than the distance between the adjacent wefts 2c. Thus, the lower slat group 3L could not be rotated. On the other hand, in this embodiment, since the warp 2a is divided, on the warp 2a side, the maximum distance between adjacent slats 3a is not defined by the interval between adjacent wefts 2c. For this reason, in this embodiment, as shown in FIG. 14, it is also possible to place the lower slat group 3L in a reverse fully closed state while keeping the slats 3a of the upper slat group 3U horizontal.

  In the present embodiment, the tilt angle of the upper slat group 3U can be adjusted by operating the lifting / lowering operation cord 8 shown in FIG. In addition to the operation, the inclination angle of the lower slat group 3L can be adjusted by lifting the switching cord 20 by operating the switching operation cord 23 (grip 23a).

  Instead of the warp 2a, the warp 2b may be divided and the switching cord 20 may be connected to the warp 2b.

(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to FIG. The present embodiment is similar to the second embodiment, and hereinafter, differences will be mainly described.

  In the present embodiment, as shown in FIG. 15, the switching cord 20 is connected to the bottom rail 4 instead of being connected to the warp 2 a of the ladder cord 2 at the connection point 25. A weft 2e is provided between the switching cord 20 and the warp 2b at the same interval as the weft 2c of the ladder cord 2, and the slat 3a of the lower slat group 3L is supported by the weft 2e.

  Also in this embodiment, the inclination angle of the upper slat group 3U can be adjusted by operating the lifting operation cord 8 shown in FIG. 1, and the inclination angle of the lower slat group 3L can be adjusted by operating the lifting operation code 8 and the switching operation code 23. Can be adjusted.

  Instead of the warp 2a, the warp 2b may be divided and the weft 2e may be provided between the warp 2a and the switching cord 20.

(Fourth embodiment)
Next, a sixth embodiment of the present invention will be described with reference to FIG. The present embodiment is similar to the third embodiment, and hereinafter, differences will be mainly described.

  In the present embodiment, as shown in FIG. 16, the ladder cord 2 supports only the upper slat group 3U. An intermediate rail 4 a is provided at the lower end of the ladder cord 2. The switching cord 20 is connected to the bottom rail 4. An auxiliary cord 20a having one end connected to the head box 1 and the other end connected to the bottom rail 4 is provided. Between the switching cord 20 and the auxiliary cord 20a, substantially the same as the weft 2c of the ladder cord 2 is provided. Wefts 2f are provided at intervals, and the slats 3a of the lower slat group 3L are supported by the wefts 2f.

  In the present embodiment, the inclination angle of the upper slat group 3U can be adjusted by the lifting operation cord 8 shown in FIG. 1, and the inclination angle of the lower slat group 3L is raised by lifting the switching cord 20 by operating the switching operation code 23. Can be adjusted.

  Further, the lower slat group 3L can be lifted and lowered by the lifting mechanism M1 (see FIG. 1) similarly to the first embodiment. When the bottom rail 4 is raised, the upper slat group 3U can be raised by pushing up the intermediate rail 4a and the upper slat group 3U, and the upper slat group 3U can be lowered by lowering the bottom rail 4. In this case, the intermediate rail 4a can be omitted. Further, another lifting cord may be provided on the intermediate rail 4a so that the upper slat group 3U can be lifted and lowered independently.

  The arrangement of the auxiliary cord 20a and the switching cord 20 may be reversed, the switching cord 20 may be arranged on the warp yarn 2b side, and the auxiliary cord 20a may be arranged on the warp yarn 2a side.

  In addition, this invention is not limited to the said embodiment, A various deformation | transformation and change are possible within the range of the summary of invention.

  M3: Angle switching mechanism, 1: Head box, 1a: One end, 1b: Other end, 2: Ladder cord (slat support cord), 3: Slat group, 3U: Upper slat group, 3L: Lower slat group, 4: Bottom Rail: 5: Lifting cord, 6: Lifting shaft, 8: Lifting operation code, 9: Lifting operation unit, 10: Stopper, 20: Switching code, 22: Switching shaft (lifting member), 23: Switching operation code, 24: Switching operation part

Claims (8)

A head box,
A slat group having an upper slat group and a lower slat group disposed below the upper slat group; and
A slat support cord suspended from the head box and rotatably supporting the slat group;
An elevating cord for elevating the slats;
A lifting shaft housed in the head box and winding and rewinding the lifting cord by rotation;
A horizontal blind comprising a lifting operation unit for rotating the lifting shaft;
Provided with an angle switching mechanism capable of supporting the lower slat group on one end side and lifting or releasing the lower slat group by drawing or discharging a switching cord passed through the head box on the other end side ,
A horizontal blind further comprising one of the following configurations.
(1) A configuration in which the lifted state is released when the lifting operation cord is operated while the lower slat group is lifted.
(2) A configuration in which the operation of the elevating operation cord is restricted in the lifted state of the lower slat group, and the elevating operation of the slat group is disabled. The angle switching mechanism is
A lifting member that is connected to the other end side of the switching cord and operates in the head box to lift and release the switching cord, and a switching operation unit that causes the lifting member to operate in the head box The horizontal blind according to claim 1, comprising: A stopper for regulating the weight drop of the slat group by regulating the rotation of the lifting shaft;
The lifting member is a switching shaft that lifts and releases lifting of the switching cord by rotation;
When the switching shaft winds the switching cord, the lifting shaft and the switching shaft are connected to restrict the rotation of the switching shaft by the stopper, and when the lifting operation cord is operated in the suspended state, the stopper The horizontal blind according to claim 2, wherein the restriction by is released and the lifting state is released.   The horizontal blind according to claim 2 or 3, wherein when the connection between the elevating shaft and the switching shaft is released, the lifting state is released by the weight of the slat.   5. The horizontal blind according to claim 3, wherein in the suspended state, a lifting operation of the slat group by the lifting operation cord is prohibited.   The horizontal blind according to any one of claims 3 to 5, wherein when the slat lowering operation by the lifting operation cord is performed in the lifting state, the restriction by the stopper is released and the lifting state is released. . The angle switching mechanism includes an engaging portion that rotates in conjunction with rotation of the switching shaft, and an engaged portion that rotates in conjunction with the lifting shaft,
The horizontal blind according to any one of claims 3 to 6, wherein the engaging portion is connected to the engaged portion by moving in the axial direction while rotating as the front switching shaft rotates. It has a stopper that regulates the weight drop of the slat group by regulating the rotation of the lifting shaft,
The horizontal blind according to claim 1 or 2, wherein the lifting shaft is made non-rotatable when the lower slat group is lifted.