TWI672427B - Blind lifting device - Google Patents

Abstract

The present invention is capable of easily replacing the lifting cord and reducing the installation of the lifting cord The assembly cost or manufacturing cost produced; the lifting device of the louver of the present invention has a structure in which it is wound on the winding shaft (14) according to the operation of the operating rope for raising or lowering a plurality of blades or The front end of the unwinding rope (4) unwound on the winding shaft (14) is fixed to the winding shaft (14); the cover body (40) fitted to one end portion of the winding shaft (14) is provided with a rope locking a portion (45) that is disposed at a position opposed to an outer peripheral surface of the winding shaft (14) to which the cover body (40) is fitted, and has a winding shaft (14) side open An opening (45c) penetrating in the axial direction of the winding shaft (14); a through hole is formed in a state in which the lid body (40) is fitted to the winding shaft (14), and the through hole is surrounded by the rope locking portion (45) It is surrounded by the outer peripheral surface of the winding shaft (14) and has a smaller diameter than the knot (4a) provided at the front end of the lifting cord (4); the knot (4a) of the lifting cord (4) inserted into the through hole is locked in the through hole On one end side, the knot (4a) that is locked is exposed to the outside from the exposure window (45d).

Description

Blind lifting device

The present invention relates to a lifting device for a blind such as a horizontal blind, a pleated blind or a pull-up blind.

As the lifting device of the louver, there is, for example, a device disclosed in Patent Document 1. In the lifting device of the louver, a blade operating device is disposed on a side of the laterally elongated upper beam fixed to the window frame in the lateral direction, and an operating rope is suspended from the blade operating device toward the lower side of the upper beam. Further, the blade lifting shaft (drive shaft) is rotatably supported in the upper beam, and a cylindrical winding cone (winding shaft) for winding the lifting rope is attached to the blade lifting shaft in the lateral direction.

In the above-described lifting device, when the operating rope is operated in the blade lifting direction, the blade lifting direction is rotated in the winding rope winding direction, and the lifting rope is spirally wound around the outer circumferential surface of the winding cone. Through the winding, the lower beam and the blade attached to the lower end portion of the lifting rope are pulled up.

Here, a mounting structure for attaching the lifting cord to the winding cone will be described. A slit-shaped groove penetrating the inner and outer surfaces of the opening end portion is formed at the opening end portion of the winding cone. In addition, the front end of the lifting rope is fastened and knotted to form a knot. The knot root of the lift cord is inserted into the groove of the winding cone and the knot is introduced into the winding cone. Thereby, the knot is locked inside the winding cone via the groove, and the rope portion extending from the knot through the groove is disposed on the winding cone The state of the outer circumference of the cylinder. When the flange portion of the cover body is inserted into the open end portion of the winding cone and fitted, the knot introduced into the inside of the winding cone is sandwiched inside the winding cone and the flange portion of the cover Between, thus being fixed. Through this fixing, the lifting cord does not fall off the winding cone.

Further, as another example of the mounting structure in which the lifting cord is attached to the winding cone, there is a winding device disclosed in Patent Document 2. This winding device includes a C-shaped fixing ring which can be fitted to the outer peripheral surface of the winding cone as another independent member, and the fixing rope is used to fix the lifting rope as follows. In other words, the front end portion of the lifting cord is placed on the outer peripheral surface of the opening end portion of the winding cone, and the fixing ring is fitted to the outer circumferential surface of the winding cone in a state in which the fixing rope is interposed therebetween. Thereby, the lifting cord is fixed by being clamped by the fixing ring so as not to fall off from the winding cone.

[Previous Technical Literature] [Patent Literature]

Patent Document 1: Japanese Gazette, License No. 3,249,785

Patent Document 2: Japanese Gazette, License No. 3249617

In the apparatus of Patent Document 1, in the case where the lift cord is broken in the middle or the like, it is necessary to replace the lift cord. At this time, the cover rope must be removed from the winding cone and the broken lifting rope must be removed. However, when the cover body is removed from the winding cone, it is necessary to perform a man-hour operation such as unscrewing a plurality of screws or removing a cover body that is firmly assembled to the winding cone and difficult to remove. Therefore, there is a problem that the operation time for replacing the lift cord becomes high.

In the apparatus of Patent Document 2, in order to fix the lifting cord to the winding cone, the fixing ring as another independent member is used for fixing. Therefore, the number of components of the lifting device is increased, so that the number of assembly steps is increased, or the manufacturing cost is increased because the fixing ring is manufactured.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a lifting device for a louver that can easily replace a lifting cord and can reduce assembly cost or manufacturing cost due to attachment of a lifting cord.

In order to solve the above problems, the lifting device for a louver according to the present invention has a structure in which an end portion of a lifting cord is fixed to a winding shaft, and the lifting rope is wound according to an operation of an operating cord for raising or lowering a shielding member. The lifting device of the louver is characterized in that the locking portion provided at one end of the lifting rope is locked in such a manner that the locked portion is exposed to the outside. In the locking portion, the locking portion is provided in the winding shaft, a lid body fitted to one end portion of the winding shaft, and the three positions between the winding shaft and the lid body In any position.

According to this configuration, when the lift cord is broken in the middle, the locked portion at one end of the lift cord is exposed to the outside, and therefore the operator pulls the lift cord only by pinching the exposed locked portion. The lift cord can be removed from the winding shaft. Therefore, the lifting cord can be easily removed from the winding shaft.

Further, the present invention is characterized in that the locking portion is a first locking portion provided between the winding shaft and the cover; the first locking portion is disposed and fitted a position at which the outer peripheral surface of the winding shaft of the cover body is opposed to each other, and having an opening that is open on the winding shaft side and axially penetrates the winding shaft; and the cover body is fitted to the winding a through hole is formed in a state on the shaft, and the through hole is surrounded by the first locking portion and the outer circumferential surface of the winding shaft, and the diameter is smaller than the locked portion, and the through hole is inserted into the through hole. The locked portion of the lifting cord is locked to one end side of the through hole, and the first locking portion has an exposed portion that exposes the locked portion that is locked to one end side of the through hole to the outside.

According to this configuration, when the lift cord is broken in the middle, the operator can remove the lift cord by pinching the locked portion exposed from the exposed portion of the first locking portion, and the operator can remove the lift cord from the winding shaft. Lifting rope. Therefore, the lifting cord can be easily removed from the winding shaft.

Further, when the new lifting cord is attached to the winding shaft, one end of the lifting cord in a state where the locked portion is not provided is inserted from one side of the through hole and protrudes to the other side. Further, one end of the extended lifting cord is pulled out from the exposed portion to form a locked portion (for example, a knot), and the engaged portion is locked in the through hole. Therefore, the lift cord can be easily attached to the winding shaft, so that the lift cord can be easily replaced.

In addition, it is not necessary to use a fixing ring as another independent member to mount the lifting cord as in the prior art. Therefore, since no separate components are required, the assembly cost or the manufacturing cost due to the mounting of the lift cord can be reduced as compared with the prior art apparatus requiring the fixing loop.

Further, the present invention is characterized in that the locking portion is a second locking portion provided on the winding shaft or the cover body, and the second locking portion is erected in a convex shape. a winding shaft or an outer circumferential surface of the cover body, and having a groove extending in the axial direction of the winding shaft and having a width smaller than the locked portion; and the second card The lifting cord is inserted into the slot of the fixed portion and the locked portion is locked on one end side of the slot.

According to this configuration, when the upper end of the second locking portion is in the downward direction when the lifting cord is broken, the lifting cord is detached from the groove of the second locking portion, so that it is not necessary to remove the lifting cord. Even if the upper end of the second locking portion is in the upward direction, since the locked portion is only in the state of being fitted into the groove of the second locking portion, the lifting cord can be easily removed from the second locking portion.

According to the lifting device of the louver of the present invention, the lifting cord can be easily replaced, and the assembly cost or the manufacturing cost due to the mounting of the lifting cord can be reduced.

1‧‧‧ horizontal blinds

2‧‧‧上梁

3‧‧‧Operation rope

4‧‧‧ Lifting rope

4a‧‧‧Knots

5‧‧‧ Directional control rope

6‧‧‧Lower beam

7‧‧‧ leaves

10‧‧‧ lifting device

11‧‧‧ pulley

12‧‧‧Clutch mechanism

13‧‧‧Drive shaft

14‧‧‧Winding shaft

15‧‧‧ bearing parts

18‧‧‧ obstacle detection stop device

20‧‧‧blade drive

21‧‧‧ tilting axis

22‧‧‧ tilting reel

22a‧‧‧ Tilt spring

30‧‧‧Speed adjustment device

40‧‧‧ cover

41‧‧‧First cover parts

42‧‧‧First cylindrical part

43‧‧‧Second cylinder

44‧‧‧ring plate

45‧‧‧Rose Carding Department

45a‧‧‧beam

45b‧‧‧stringer

45c‧‧‧ openings

45d‧‧‧ exposed window (exposed part)

47‧‧‧Second cover parts

48‧‧‧The third cylinder

49‧‧‧Fourth cylinder

50‧‧‧ longitudinal slot

50a‧‧‧Longitudinal slot

50b‧‧‧ corner

H1, H2, H3‧‧‧ height

G1‧‧‧ interval

Fig. 1 is a side view showing a lifting device of a louver according to an embodiment of the present invention.

Fig. 2 shows the structure of a lifting device for a louver according to the present embodiment, wherein (a) is a plan view of the lifting device, and (b) is a cross-sectional view taken along line A1-A1 of (a).

Fig. 3 is a view showing the structure of the cover body and the one end portion of the winding shaft which are fitted to the winding shaft in the lifting device of the louver according to the embodiment, wherein (a) is the one end portion of the cover body and the winding shaft. In plan view, (b) is a cross-sectional view of A2-A2 shown in (a).

Fig. 4 is a view showing a structure in which a lid body is fitted to a winding shaft in the lifting device of the louver according to the embodiment, wherein (a) is a cross-sectional view of a portion in which the lid body is fitted to the winding shaft. (b) is a view from the direction of the arrow Y1 shown in (a).

FIG. 5 shows a mounting structure for attaching a lifting cord to a winding shaft in the lifting device of the louver according to the present embodiment, wherein (a) shows a structure of one end portion of the winding shaft provided with the rope locking portion. The perspective view, (b) is a plan view of one end portion of the winding shaft provided with the rope locking portion.

<Configuration of Embodiment>

Embodiments of the present invention will be described in detail with reference to the drawings.

In the present embodiment, a case where the lifting device of the present invention is applied to a horizontal blind may be described as an example. Fig. 1 is a side view showing a lifting device of a horizontal blind according to an embodiment of the present invention.

As shown in Fig. 1, the horizontal louver 1 includes a head frame 2 fixed to the window frame, an annular operating rope 3 suspended from a side end portion of the upper beam 2, and suspended from the upper beam 2. The lifting cord 4 and a rudder cord 5 suspended from the upper beam 2.

Further, the horizontal louver 1 further includes a bottom rail 6 attached to the lower end portion of the lifting cord 4 and a plurality of blades 7 (shielding members) supported by the directional control cord 5.

The direction control ropes 5 are disposed on the indoor side and the outdoor side in a pair of front and rear. The plurality of blades 7 are supported at equal intervals in the vertical direction between the front and rear direction control ropes 5, 5.

A lifting device 10 for raising or lowering the lower beam 6 and each of the blades 7 and a blade driving device 20 for turning the blades 7 are housed in the upper beam 2.

The lifting device 10 includes a pulley 11 , a clutch mechanism 12 connected to the pulley 11 , a drive shaft 13 connected to the clutch mechanism 12 , a winding shaft 14 connected to the drive shaft 13 , and a winding shaft 14 The bearing member 15 that is rotatably supported.

The pulley 11 is housed in the side end portion of the upper beam 2, and the upper end portion of the operation cord 3 is hung on the pulley 11.

The clutch mechanism 12 is a device that connects or disconnects the pulley 11 and the drive shaft 13. A bearing member 15 is disposed on one side (the left side of FIG. 1) of the clutch mechanism 12.

The bearing member 15 has a bottom plate portion and left and right side walls that are erected on the bottom plate portion, and the bearing member 15 is a bracket that rotatably supports the winding shaft 14.

Further, a hole portion for guiding the lifting cord 4 and the direction control cord 5 to hang in the vertical direction is formed on the right end portion of the bottom plate portion of the bearing member 15 in Fig. 1 .

The winding shaft 14 is a cylindrical member, and both end portions of the winding shaft 14 are rotatably supported on both side walls of the bearing member 15. Among them, a lid body 40 to be described later is attached to one end portion of the winding shaft 14 (the left side facing the drawing surface).

The drive shaft 13 is inserted into the winding shaft 14, and the drive shaft 13 and the winding shaft 14 are fitted so that the winding shaft 14 rotates in conjunction with the drive shaft 13. An upper end portion of the lifting cord 4 is fixed to the winding shaft 14.

In the lifting device 10, when the operation cord 3 is rotationally operated to rotate the pulley 11, the drive shaft 13 and the winding shaft 14 are rotated by the clutch mechanism 12.

Then, by winding the lifting/lowering cord 4 around the winding shaft 14, the lower beam 6 can be raised, and the lower blades 6 can be used to lift the respective blades 7 from the lower blades 7 in order, thereby enabling the respective blades 7 to be lifted. rise.

Further, when the lower rope 6 wound around the winding shaft 14 is unwound and the lower beam 6 is lowered, the blades 7 are sequentially supported by the direction control rope 5 from the upper blades 7 and sequentially developed.

When the lower beam 6 is lowered, the connection between the pulley 11 and the drive shaft 13 is broken by the clutch mechanism 12, whereby the lower beam 6 can be lowered by its own weight.

The speed adjusting device 30 is housed in the upper beam 2. When the lower beam 6 is lowered by its own weight, the speed adjusting device 30 adjusts the lower beam 6 by applying a braking force to the winding shaft 14. The speed of the decline. As the speed adjusting device 30, a speed reducer such as a governor or a hydraulic damper can be used.

Further, an obstacle detecting and stopping device 18 (see (b) in FIG. 2) is provided inside the lid 40, and when the lower beam 6 comes into contact with the obstacle during the lowering process, the obstacle detecting and stopping device 18 makes the winding shaft 14 stops rotating, thereby stopping the lower beam 6.

The obstacle detecting and stopping device 18 is configured such that when the lower beam 6 comes into contact with the obstacle during the lowering process so that the tension of the lifting rope 4 becomes small, the stopper protrudes from the end of the winding shaft 14 and with the bearing member 15 Engage, thereby causing the winding shaft 14 to stop rotating.

The blade drive device 20 is provided with a tilt shaft 21 and a tilt drum 22 connected to the tilt shaft 21. In addition, the blade drive unit 20 is supported on the bearing member 15.

The tilt shaft 21 is coupled to the pulley 11 by a gear mechanism, and the tilt shaft 21 is configured to rotate in conjunction with the pulley 11.

The inclined reel 22 is a cylindrical member that is rotatably supported on the bearing member 15. The tilt shaft 21 is coupled to the tilt reel 22 by a gear mechanism, so that the tilt reel 22 rotates in conjunction with the tilt shaft 21.

A spiral tilt spring 22a is wound around the outer circumferential surface of the inclined reel 22, and the tilt spring 22a is fastened to the outer circumferential surface of the inclined reel 22.

Further, upper end portions of the front and rear direction control ropes 5, 5 are fixed to the tilt spring 22a.

When the operation cord 3 is rotated and the pulley 11 is rotated while the blades 7 are horizontal, the drive shaft 13 and the tilt shaft 21 are rotated. Then, in the blade driving device 20, the tilting reel 22 and the tilting spring 22a are rotated in conjunction with the tilting shaft 21, so that one of the front and rear direction control ropes 5, 5 is lowered, and the other direction is The control rope rises. Thereby, the blades 7 supported between the front and rear direction control ropes 5, 5 stand up, and the blades 7 overlap each other in the front-rear direction.

Next, a mounting structure for attaching the lifting cord 4 to the winding shaft 14 in the above-described lifting device 10 will be described in detail with reference to Figs. 2 to 4 .

2 shows the structure of the lifting device 10, wherein (a) is a plan view of the lifting device 10, and (b) is a cross-sectional view taken along line A1-A1 shown in (a). 3 shows the structure of the lid body 40 and the one end portion of the winding shaft 14 which are fitted to the opening end portion (also referred to simply as "end portion") of the winding shaft 14 in the lifting device 10, wherein (a) It is a plan view of one end portion of the lid body 40 and the winding shaft 14, and (b) is a cross-sectional view taken along line A2-A2 shown in (a). 4 is a view showing a structure in which a lid body 40 is fitted to a winding shaft 14, wherein (a) is a cross-sectional view of a portion in which the lid body 40 is fitted to the winding shaft 14, and (b) is a A view from the direction of the arrow Y1 shown in (a).

As shown in FIG. 2(a), the lid body 40 is fitted to the opening end portion (the left side facing the drawing surface) of the winding shaft 14. As shown in (a) and (b) of FIG. 3, the lid body 40 is a combination of the first lid member 41 and the second lid member 47.

The first lid member 41 is formed such that the cylindrical first cylindrical portion 42 and the second cylindrical portion 43 having different diameter sizes are integrally fixed to the left and right via the annular plate 44. Further, on the side surface of the annular plate 44 on the side of the winding shaft 14, the top view shape shown in Fig. 3(a) is integrally formed. The shape of the rope locking portion 45. It should be noted that the rope locking portion 45 is the locking portion or the first locking portion described in the patent application.

The diameter of the first cylindrical portion 42 is smaller than the diameter of the second cylindrical portion 43, and as shown in (a) of FIG. 4, the diameter of the first cylindrical portion 42 is formed to be inserted and fitted into the inside of the winding shaft 14. Diameter size. In addition, the diameter of the annular plate 44 is larger than the diameter of the second cylindrical portion 43. When the first cylindrical portion 42 is fitted into the winding shaft 14, the opening end surface of the winding shaft 14 is in contact with the annular plate 44.

The rope locking portion 45 is fixed to the annular plate 44 in such a manner that when the first cylindrical portion 42 is inserted into the inside of the winding shaft 14, the rope locking portion 45 is located on the outer peripheral side of the winding shaft 14 ( The outer side of the outer peripheral surface). Further, as shown in FIG. 3(b), the rope locking portion 45 is fixed to the one surface of the annular plate 44 in a vertically symmetrical manner with respect to the first cylindrical portion 42. An interval G1 at which the opening end portion of the winding shaft 14 can be inserted is formed between each of the rope locking portions 45 and the first cylindrical portion 42. Further, as shown in FIG. 3( a ), the shape of the rope locking portion 45 in plan view is “ The rope locking portion 45 is formed by fixing the ends of the side cross members 45a extending in parallel to the annular plate 44 and connecting the front ends of the side cross members 45a to each other by the side members 45b. "shape.

As shown in FIG. 3(b), each of the beams 45a has a height H1, and the stringers 45b have a height H2 of a height of half or less of the height H1. The stringer 45b is fixed to the upper side of the beam 45a which is half the height H1, and a part thereof protrudes from above the beam 45a. An opening 45c having a height H3 from the lower surface to the outer circumferential surface of the winding shaft 14 is formed on the lower surface side of the side member 45b (see (a) and (b) in Fig. 4). This height H3 is formed to be smaller than the minimum outer diameter portion of the knot 4a of the lift cord 4. In addition, a portion having a rectangular shape in a plan view surrounded by the faces of the respective cross members 45a, the side members 45b, and the annular plate 44 is such that the knot 4a of the lift cord 4 is as follows, as indicated by a broken line in Fig. 3(a). The mode card timing causes the knot 4a to be exposed to the exposed window (exposed portion) 45d of the outside.

The opening 45c penetrates and opens in the insertion direction of the winding shaft 14, and the first cylindrical portion 42 side (the winding shaft 14 side) of the opening 45c is opened. That is, the rope locking portion 45 has an arcuate opening 45c. Further, the opening 45c is configured such that when the first cylindrical portion 42 is inserted into the winding shaft 14 and fitted as shown in FIG. 4(a), the open side of the opening 45c is rolled. The outer peripheral surface of the shaft 14 is blocked to form a through hole. As shown in (b) of FIG. 4, the through hole has a shape observed from the direction of the arrow Y1 in (a) of FIG. 4: two arcs of a concentric circle centered on the axis of the winding shaft 14 and A substantially square shape surrounded by parallel straight lines formed by two beams 45a. Further, the diameter of the through hole is formed to be smaller than the outer diameter of the knot 4a of the lift cord 4, and is a size in which the knot 4a cannot pass.

As shown in (a) and (b) of FIG. 3, in a state where the cover 40 is removed from the winding shaft 14, the root of the knot 4a of the lift cord 4 is inserted into the opening 45c, and the knot 4a is disposed. Temporary locking is performed in the exposure window 45d of the rope locking portion 45. This temporary locking is performed by a person pressing a root portion of the knot 4a inserted into the opening 45c by a hand or the like. When the first cylindrical portion 42 is inserted into the inside of the winding shaft 14 in the temporarily locked state, the knot 4a disposed at the inner portion of the string locking portion 45 is formed by the through hole card formed by the opening 45c. Fixed and fixed. It should be noted that the knot 4a is the locked portion described in the patent application scope. In addition to the knot 4a, the engaged portion may be another member that can be attached to the end of the lift cord 4 without passing through the through hole.

Next, the second cover member 47 is formed into a shape in which a cylindrical third cylindrical portion 48 that is inserted and fitted into the inside of the second cylindrical portion 43 and a diameter smaller than the third cylindrical portion are formed. The cylindrical fourth cylindrical portion 49 of 48 has a split layer shape formed integrally with each other in the front-rear direction. As shown in FIG. 2(b), after the obstacle detection stopping device 18 is disposed inside the first cover member 41, the second cover member 47 is fitted into the first cover member 41. The embedded second cover member 47 is inserted and fitted into the inside of the second cylindrical portion 43 as shown in FIG. 3(b). The second cover member 47 is rotatably supported by the bearing member 15 as shown in Figs. 2(a) and (b).

<Action of Embodiment>

In the configuration described above, for example, when the lifting cord 4 is detached in the middle, the lifting cord 4 is detached and a new lifting cord 4 is attached.

First, when the lift cord 4 is broken in the middle, since the lift cord 4 is broken in the middle, the knot 4a exposed from the exposure window 45d of the cord lock portion 45 is pinched and the lift cord 4 is pulled out.

Thereafter, when the new lifting cord 4 is mounted on the winding shaft 14, as shown in Fig. 1, the operator passes the lower end (the other end) through the hole of the bearing member 15 to which the lifting cord 4 attached to the lower beam 6 is passed. The portion is guided to the outer peripheral surface of the winding shaft 14. Further, the upper end (one end) of the guided lifting cord 4 is inserted from the side of the through hole formed by the opening 45c shown in FIG. 4(a), and protrudes to the other side. The front end of the extended lifting cord 4 is pulled out from the exposure window 45d and knotted to form a knot 4a. When the knot 4a is pulled back to the exposure window 45d, the lift cord 4 is pulled in the direction of the winding shaft 14 by the weight of the lower beam 6, and thus the knot 4a is locked by the through hole. Further, when the upper end of the lift cord 4 is difficult to pass through the opening 45c, the upper end of the lift cord is passed through the opening 45c so as to be pressed by a wire-shaped jig or the like.

<Effect of Embodiment>

As described above, in the lifting device 10 of the louver according to the present embodiment, when the lifting/lowering cord 4 is broken in the middle, the operator pulls out only the knot 4a exposed from the exposure window 45d of the rope locking portion 45 and pulls it out. The lifting cord 4 can be removed from the winding shaft 14. Therefore, the lift cord 4 can be easily removed from the winding shaft 14.

Further, when the new lifting cord 4 is attached to the winding shaft 14, the lower end of the lifting cord 4 is fixed to the lower beam 6, and is guided to the outer circumference of the winding shaft 14 after passing through the hole portion of the bearing member 15. The upper end of the surface of the lifting cord 4 is inserted from one side of the through hole formed by the opening 45c of the rope locking portion 45, and protrudes to the other side. The front end of the extended lifting cord 4 is pulled out from the exposure window 45d and knotted to form a knot 4a, and the knot 4a is pulled back to expose The window 45d is such that the knot 4a is locked by the through hole. Therefore, the lift cord 4 can be easily attached to the winding shaft 14.

However, it may be implemented in the opposite direction to the above-described insertion direction, that is, the lower end side of the lifting cord 4 opposite to the knot 4a is passed through the opening 45c and guided to the outer peripheral surface of the winding shaft 14, and further, the bearing member. The hole portion of 15 is guided through to the lower beam 6, and then the lower end side of the guided lifting rope 4 is attached to the lower beam 6.

As described above, according to the lifting device 10 of the present embodiment, the lifting cord 4 can be easily replaced. In addition, it is not necessary to use the fixing ring as another independent member to mount the lifting cord 4 as in the prior art. Therefore, since no separate components are required, the assembly cost or the manufacturing cost due to the mounting of the lift cord 4 can be reduced as compared with the prior art apparatus requiring the fixing loop.

<Other examples of the embodiment>

Next, another example of the mounting structure for attaching the lifting/lowering cord 4 to the winding shaft 14 will be described with reference to Fig. 5 .

FIG. 5 shows a mounting structure in which the lifting cord 4 is attached to the winding shaft 14, wherein (a) is a perspective view showing the structure of one end portion of the winding shaft 14 on which the rope locking portion 50 is disposed, (b) It is a top view of the one end part of the winding shaft 14 provided with the rope locking part 50. It should be noted that the rope locking portion 50 is the locking portion or the second locking portion described in the patent application.

As shown in (a) and (b) of FIG. 5, a rope locking portion 50 is provided upright on the outer peripheral surface of one end portion of the winding shaft 14.

As shown in (a) of FIG. 5, the string locking portion 50 has a substantially square plate shape, and the lower end of the plate shape is bent at the same curvature as the curved surface of the outer peripheral surface of the winding shaft 14, and is fixed at The outer peripheral surface. The rope locking portion 50 is fixed in a state in which the left and right sides of the plate shape are directed to the axial direction of the winding shaft 14, respectively.

Further, in the rope locking portion 50, a vertical groove 50a is formed from a central portion of the upper end of the plate shape to a position near the lower end. The vertical groove 50a penetrates the rope locking portion 50 in the axial direction of the winding shaft 14, and extends upward from the lower side at the same width, and is inclined to both sides to the upper end in the vicinity of the upper end, thereby being formed in the vicinity of the upper end to have a gradually increasing width. Expanded shape. That is, the corner portion 50b at the upper end of the vertical groove 50a is chamfered. Further, the groove portion of the longitudinal groove 50a extending in the same width is sized to be able to pass through the lifting cord 4 but the knot 4a cannot pass.

Therefore, as shown in (b) of FIG. 5, when the root of the knot 4a of the lifting cord 4 is inserted into the longitudinal groove 50a of the cord locking portion 50 and the knot 4a is disposed on the open end side of the winding shaft 14, Then, the lifting cord 4 can be locked so that it does not fall off. This is because the lower end side of the lifting cord 4 is pulled by the weight of the lower beam 6, so that the knot 4a is locked in the longitudinal groove 50a. In the locked state, since the outer shape of the knot 4a is larger than the width of the vertical groove 50a, the knot 4a does not fall off from the longitudinal groove 50a. Further, when the root portion of the knot 4a of the lift cord 4 is inserted into the vertical groove 50a, since the chamfered corner portion 50b is formed at the upper end of the vertical groove 50a, it is easy to insert.

As described above, by attaching the lifting/lowering cord 4 to the rope locking portion 50 that is erected on the outer circumferential surface of the winding shaft 14, and locking it, the replacement of the lifting cord 4 can be easily performed. For example, when the lifting cord 4 is broken in the middle, the force for locking the lifting cord 4 to the rope locking portion 50, that is, the pulling force caused by the weight of the lower beam 6 disappears. Therefore, the knot 4a can be taken out from the vertical groove 50a, so that the lift cord 4 can be easily removed from the winding shaft 14.

Thereafter, when the lifting cord 4 is attached to the winding shaft 14, the root of the knot 4a of the lifting cord 4 whose lower end is connected to the lower beam 6 is inserted into the longitudinal groove 50a of the cord locking portion 50 and the knot 4a is attached. Just fix it.

Therefore, according to another example of the embodiment, the lift cord 4 can be easily replaced. Further, when the lift cord 4 is broken, if the upper end of the rope locking portion 50 is directed downward, the lift cord 4 is detached from the cord lock portion 50, so that it is not necessary to remove the lift cord 4 Processing. Even if the upper end of the rope locking portion 50 is in the upward direction, since the root portion of the knot 4a is only in the state of being fitted in the longitudinal groove 50a of the rope locking portion 50, it can be easily taken from the rope locking portion 50. Lower the lifting rope 4.

Further, the vertical groove 50a of the string locking portion 50 may have a shape in which the width of the groove gradually narrows from the lower side toward the upper side, and the corner portion 50b near the upper end is chamfered. At this time, in the normal case where the lifting/lowering cord 4 is not broken, the root portion of the knot 4a can be prevented from falling off. Further, in the above description, the vertical locking groove 50a is formed in the longitudinal direction of the rope locking portion 50. However, instead of the vertical groove 50a, a lateral direction may be formed on the rope locking portion 50 that is erected. Slot or diagonal groove. Further, the rope locking portion 50 as the second locking portion may be provided on the outer circumferential surface of the second cylindrical portion 43 of the lid body 40. Further, a groove similar to the vertical groove 50a may be formed in the outer peripheral edge portion of the annular plate 44 as a second locking portion.

The embodiment of the present invention has been described above, but the present invention is not limited to the above-described embodiment, and can be appropriately modified without departing from the scope of the invention.

For example, in the present embodiment, the case where the lifting device of the present invention is applied to a horizontal blind having a plurality of blades has been described, but the lifting device of the present invention can be applied to a roman blind (roll-up curtain) or Various louvers such as pleated blinds (insolation screening devices).

Claims (3)

A louver lifting device having a structure for fixing an end portion of a lifting cord to a winding shaft, wherein the lifting rope is wound around the winding according to an operation of an operating cord for raising or lowering a shielding member Unwinding on or off the winding shaft, the lifting device of the louver is characterized in that the lifting rope is inserted in a state in which the cover body is fitted to one end of the winding shaft The locked portion provided at one end of the lifting cord is exposed to the locked portion in the opening surrounded by the locking portion of the cover and the outer peripheral surface of the winding shaft The outer portion of the winding shaft is locked to the locking portion. The lifting device of the louver according to the first aspect of the invention, wherein the cover body includes the locking portion, and the locking portion is disposed on an outer circumference of the winding shaft to which the cover body is fitted a position at which the surface faces the same, and the opening having the winding shaft side open and axially penetrating the winding shaft, in a state in which the lid body is fitted to the winding shaft, Forming a through hole having a diameter smaller than the locked portion by the outer peripheral surface of the locking portion and the winding shaft to surround the opening, and inserting the card into the through hole The fixed portion is locked to one end side of the through hole, and the locking portion has an exposed portion that exposes the locked portion that is locked to one end side of the through hole to the outside of the winding shaft. The lifting device of the louver according to the first aspect of the invention, wherein the locking portion is disposed on the winding shaft or the cover body, The locking portion is erected in a convex shape on the outer circumferential surface of the winding shaft or the cover body, and has a portion extending in the axial direction along the winding axis and having a width smaller than that on the convex portion The groove of the locked portion is inserted into the groove of the locking portion, and the locked portion is locked to one end side of the groove.