JP2001173343A - Shading material rising and falling device for solar shading device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shading material rising and falling device for a solar shading material capable of controlling the abrasion of a rising and falling cord. SOLUTION: The pulling-up operation of the solar shading material suspended and borne from a head box 1 can be made by pulling the rising and falling cord 10 out of the head box 1, the falling operation of the solar shading material can be made by pulling the rising and falling cord 10 in the head box 1 based on the weight of the solar shading material, the head box 1 can select either the pulling-up operation of the solar shading material and falling operation or a self-weight falling preventive operation for preventing the falling based on the weight of the solar shading material, and in the shading material rising and falling device for a solar shading device equipped with a self-weight falling prevention device 11, the self-weight falling prevention device 11 separates a holding device 21 for preventing the movement of the rising and falling cord 10 by holding if in the case of the self-weight falling preventive operation from the rising and falling cord 10 except the time in the case of the self-weight falling preventive operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevating device for elevating and lowering a solar shading material such as a slat of a horizontal blind, a curtain fabric of a tuck-up curtain or a pleated curtain.

[0002]

2. Description of the Related Art As one type of a slat elevating device of a horizontal blind, a slat can be raised by pulling out an elevating cord suspended from one side of a head box from the head box, and based on the weight of the slat and the bottom rail. Some slats can be lowered by pulling a lifting cord into a head box.

In such a slat elevating device, a self-weight descent prevention device for preventing the slat from falling by its own weight when the elevating code is not operated is arranged near a drawer opening for pulling out the elevating code from the head box.

[0004] Utility model registration publication No. 2591165, Japanese Patent Publication No. 2752303, Japanese Patent Publication No. 29121
No. 39 discloses that the operation of the nipping roller and the cam mechanism
A weight drop prevention device for preventing the weight of the slat from falling is disclosed.

[0005]

In any of the devices described in the above publications, when the slats are raised and lowered, the lifting cord moves while constantly contacting the peripheral surface of the holding roller. The outer peripheral surface of the holding roller is formed in a gear shape in order to securely hold the lifting cord.

Accordingly, there is a problem that as the slat is moved up and down repeatedly, the up and down cord is easily worn.
In addition, in order to move the holding roller to the lifting cord holding position based on the operation of the cam mechanism from the state in which the self-weight drop prevention device is not operated, the cam mechanism is rotated while rotating the holding roller with the movement of the lifting cord. It is necessary to move it to a position where it meshes, and further to mesh with the cam mechanism to move it to the position where the lifting cord is held.

[0007] Then, after the slat is pulled up to a desired position and before the self-weight drop prevention device is operated, the return amount of the lifting / lowering cord increases, and the descending amount of the slat increases. Therefore, there is a problem that it is difficult to finely adjust the suspension position of the slat.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a solar radiation shielding material lifting / lowering device capable of suppressing wear of a lifting / lowering cord.

[0009]

According to the first aspect of the present invention, the lifting / lowering cord is pulled out from the head box, whereby the solar shading material suspended and supported from the head box can be pulled up, and based on the weight of the solar shading material. The solar radiation shielding material can be lowered by pulling the elevating cord into the head box, and the head box has
A shielding material for a solar shading device provided with a self-weight drop prevention device that can select any of a lifting operation and a lowering operation of the solar shading material and a self-weight descent preventing operation for preventing a descent based on the weight of the solar shading material. In the lifting device, the self-weight drop prevention device separates the holding means for holding the lifting code and preventing its movement during the self-weight drop prevention operation from the lifting code except during the self-weight drop prevention operation.

According to a second aspect of the present invention, the holding means is moved to a pull-up operation position and a descent operation position of the solar shading material and a self-weight drop prevention operation position by a bogie which moves in the case with the movement of the elevating cord. A movable operation is possible, and between the carriage and the case, an operation position of the carriage is a first position for performing a self-weight drop prevention operation based on an operation of the lifting / lowering code, and a second position for releasing the self-weight drop prevention operation. A cam mechanism is provided which can be sequentially switched to a second position, a third position allowing the slats to descend, and a fourth position allowing the slats to be pulled up.

According to the third aspect, the holding means is rotatably supported by the self-weight drop prevention device. According to claim 4, the bogie is provided with a hold spring for holding the elevating cord with a predetermined frictional force, and with the movement of the elevating cord, the bogie is moved within the operating range of the cam mechanism. It is possible to move with.

According to a fifth aspect of the present invention, the hold spring is capable of holding the up / down cord while allowing the up / down cord to move in the vertical direction. In claim 6, the hold spring allows the lifting cord to be sandwiched between a pair of pressing portions bent in a cylindrical shape, and the bogie has a chevron portion that projects between the pressing portions and positions the hold spring. Provided.

According to a seventh aspect of the present invention, the carriage is provided with an insertion portion through which the elevation code can be inserted while maintaining the height position of the elevation code guided into the head box, Further, the holding means is movably supported.

According to another aspect of the present invention, the carriage is provided with a tension plate for pressing the lifting cord with a predetermined frictional force on the carriage, and as the lifting cord moves, the tension plate is moved within the operating range of the cam mechanism. The cart can be moved.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) A first embodiment of the present invention embodied in a horizontal blind will be described below with reference to the drawings. The horizontal blind shown in FIG.
A plurality of slats 3 are suspended from the head box 1 via a plurality of ladder cords 2, and the ladder cords 2
A bottom rail 4 is suspended and supported at the lower end of the bottom rail.

A plurality of support members 5 are provided in the head box 1, and a drum 6 is rotatably supported by the support members 5. The upper end of the ladder cord 2 is attached to the drum 6, and an angle adjusting shaft 7 is inserted into the center of the drum 6.

Accordingly, when the angle adjusting shaft 7 is rotated, the drum 6 is rotated, and with the rotation of the drum 6, one of the ladder cords 2 is pulled up, whereby the angles of the slats 3 are adjusted in phase. You.

At one end of the head box 1, an operation rod 8 is suspended and supported. When the operating rod 8 is rotated, the angle adjusting shaft 7 is rotated via a gear box 9 disposed in the head box 1. Therefore, the angle of each slat 3 can be adjusted by rotating the operation rod 8.

On both sides of the slat 3, a lifting cord 1
0 is inserted, and one end of the lifting cord 10 is attached to the bottom rail 4. The other end of the elevating cord 10 is guided through the support member 5 to a self-weight drop prevention device 11 provided at one end of the head box 1 as shown in FIG.

The weight lowering prevention device 11 is inserted into the operation rod 8 through the guide roller 9a in the gear box 9, and the tip is connected to the cord equalizer 12.

Therefore, as shown by a chain line in FIG. 1, when the cord equalizer 12 is pulled downward and the lifting cord 10 is pulled out from the head box 1, the slat 3 is pulled up by pulling up the bottom rail 4.

Then, if the lifting operation of the lifting cord 10 is stopped and the lifting cord 10 is released, the self-weight descent prevention device 11 operates to prevent the slats 3 and the bottom rail 4 from falling.

Further, when the lifting / lowering cord 10 is slightly pulled downward from the state in which the self-weight descent prevention device 11 is operating, the operation of the self-weight descent prevention device is released, and the slats 3 and the bottom rail 4 are moved by their own weight. Lowering operation is possible.

The specific structure of the self-weight drop prevention device 11 will be described. As shown in FIG. 2, a case 13 of the self-weight drop prevention device 11 is provided near the gear box 9 in the head box 1. 5 is fixed.

In the case 13, a carriage 14 is supported so as to be movable in the longitudinal direction of the head box 1. An insertion portion 15 for inserting the lifting cord 10 is formed at a lower portion of the carriage 14.

At the center of the carriage 14, a hold spring 16 is provided. This hold spring 16 is shown in FIG.
As shown in, pull out the center of the elastic metal plate,
Pressing portion 17 of lifting cord 10 by bending both ends in a cylindrical shape
a, 17b are formed, and the carriage 14 is bent in a state where the pressing portions 17a, 17b are folded in two so as to face each other.
It is arranged in.

The carriage 14 is provided with a chevron 14a projecting between the pressing portions 17a and 17b of the hold spring 16, and the hold spring 16 is vertically positioned by the chevron 14a. It is immovably supported in the longitudinal direction of the box 1, that is, in the left-right direction in FIG.

The pressing portions 17a and 17b can be bent in a direction away from the chevron 14a. A first pulley 18 is rotatably supported at an end of the case 13 on the side of the gear box 9. A second pulley 19 is rotatably supported at an end of the case 13 on the support member 5 side.

The lifting cord 10 is connected to the gear box 9.
From the first pulley 18, and is guided into each of the support members 5 through between the pressing portions 17 a and 17 b of the hold spring 16 and over the second pulley 19. And, it is guided under the head box 1 through a pulley 20 in the support member 5.

The holding spring 16 holds the lifting cord 10 between the pressing portions 17a and 17b by its spring force. Accordingly, a predetermined frictional force acts between the pressing portions 17a and 17b and the lifting cord 10, and when the lifting cord 10 moves in the case 13, the carriage 14 moves together with the hold spring 16. .

When the movement of the carriage 14 in the case 13 is prevented, the movement of the hold spring 16 is prevented, so that the lifting cord 10 moves while rubbing against the pressing portions 17a and 17b.

The case 13 includes the second pulley 19.
Above the stopper cam 21, a stopper cam 21 is rotatably supported. That is, the base end of the stopper cam 21 is rotatably supported on the case 13 with the shaft 22 as a rotation fulcrum, and the shaft 22 is located above the second pulley 19.

The tip of the stopper cam 21 is formed as a curved surface facing the outer peripheral surface of the second pulley 19, and a gear-shaped unevenness is formed as a non-slip 23 on the peripheral surface.

When the stopper cam 21 rotates toward the second pulley 19, the non-slip 23 reaches the vicinity of the outer peripheral surface of the second pulley 19, and the non-slip 23 and the second pulley 1
9 is set to be sufficiently smaller than the diameter of the elevating cord 10.

Therefore, as shown in FIG. 2, when the lifting cord 10 is sandwiched between the stopper cam 21 and the second pulley 19 and the lifting cord 10 further moves in the slat descending direction, the lifting cord 10 Ten further movements are prevented.

Further, engaging projections 24 are formed on both side surfaces of the stopper cam 21, respectively. The cart 1
4, a pair of support pieces 25 extending on both sides of the stopper cam 21 are formed on the stopper cam 21 side, and the stopper cam 21 rotates between the support pieces 25.

An engagement recess 26 with which the engagement protrusion 24 engages is formed at the upper edge of each support piece 25. The engaging recess 26 is formed downward from the upper edge of each support piece 25, and a slope 27 is formed on the upper side edge of the stopper cam 21 side.
It is wider towards the side.

When the carriage 14 advances toward the stopper cam 21 as shown in FIG. 2, the engagement projection 24 is guided downward in the engagement recess 26, and
When the cart 1 rotates downward and the carriage 14 retreats in the direction away from the stopper cam 21, the engaging projection 24 is guided on the slope of the engaging concave portion 26, and the stopper cam 21 is moved upward as shown in FIG. To rotate.

A cam mechanism 28 is formed between the carriage 14 and the case 13. That is, below the first pulley 18, the camshaft 2 is provided on the bottom surface of the case 13.
9 is supported so as to be movable only in the front-back direction of the head box 1.

On the lower surface of the carriage 14, the cam shaft 29
Are formed in the guide groove 30 for guiding the air. As shown in FIG. 4, the guide groove 30 moves with the carriage 14,
The cam shaft 29 is stopped or held at each of the positions P1 to P4 while sequentially rotating in the order of the first to fourth positions P1 to P4.

Next, the operation of the self-weight drop prevention device configured as described above will be described. As shown in FIG. 2, when the lifting cord 10 is sandwiched between the stopper cam 21 and the second pulley 19, the movement of the lifting cord 10 in the slat descending direction is prevented. At this time, the cam shaft 29 is located at the first position P1 in the guide groove 30.

When the lifting cord 10 is pulled out of the head box 1 from this state, the lifting cord 10 moves in the direction of arrow A, and the carriage 14 moves in the same direction. Then, the cam shaft 29 moves from the first position P1 to the second position P2, and further movement of the carriage 14 in the same direction is prevented.

At this time, the stopper cam 21 rotates upward with the movement of the carriage 14, and as shown in FIG. 5, the stopper cam 21 is in a state where the holding of the lifting cord 10 is released.

When the lifting cord 10 is released from this state, the lifting cord 10 moves in the direction of the arrow B due to the weight of the slats 3 and the bottom rail 4, and the carriage 14 moves in the same direction.

Then, the cam shaft 29 moves from the second position P2 to the third position P3, and further movement is prevented. Accordingly, after the carriage 14 slightly moves in the direction of arrow B, further movement in the same direction is prevented, and stops in the state shown in FIG.

In this state, the holding of the lifting cord 10 by the stopper cam 21 is maintained in a released state. Therefore, the lifting cord 10 is subjected to friction with the hold spring 16 based on the weight of the slats 3 and the bottom rail 4. Move in the direction of arrow B against. Therefore, the slats 3 and the bottom rail 4 descend by their own weight.

In the state shown in FIG. 6, when the slat 3 is lowered to the desired position and the lifting cord 10 is pulled out, the carriage 14 moves in the direction of arrow A, and the cam shaft 29 moves to the third position P.
Move from 3 to the fourth position P4.

Then, the carriage 14 is prevented from further moving in the same direction, and as shown in FIG.
Reference numeral 1 is maintained in a state in which the holding of the lifting cord 10 is released. In this state, the lifting cord 10 is
Slat 3 can be pulled up to a desired position.

When the lifting cord 10 is released from the state where the camshaft 29 is located at the fourth position P4, the slat 3
The lifting cord 10 moves in the direction of arrow B due to the weight of the bottom rail 4 and the carriage 14 moves in the same direction.

Then, as shown in FIG. 2, the stopper cam 21 is rotated downward to clamp the lifting cord 10 between the stopper pulley 19 and the second pulley 19, and to move the lifting cord 10 in the same direction. Since the slats 3 and the bottom rail 4 are prevented from falling, their weights are prevented.

At this time, the cam shaft 29 moves from the fourth position P4 to the first position P1 and stops. In the horizontal blind slat lifting device configured as above,
The following operation and effect can be obtained.

(1) Connect the lifting cord 10 to the head box 1
, The slats 3 can be pulled up to a desired position. (2) Following the lifting operation of the slat 3, the lifting cord 1
When release is performed, the lifting cord 10 is sandwiched between the stopper cam 21 and the second pulley 19, and the movement of the lifting cord 10 due to the weight of the slats 3 and the bottom rail 4 is prevented. Therefore, by letting go of the lifting cord 10, the operation of preventing the slat 3 from falling by its own weight can be easily performed.

(3) When the lifting cord 10 is slightly pulled and released when the slat 3 is prevented from falling under its own weight, the slat 3 and the bottom rail 4 can be lowered by their own weight.

(4) The pressing portions 17a and 17b of the hold spring 16 interposed between the lifting cord 10 and the carriage 14
It is arranged so as to be able to bend in the up-down direction in the carriage 14. Therefore, the lifting cord 10 is pressed between the pressing portions 17a and 17b.
Even if they are overlapped in the vertical direction,
0 can be reliably pinched. In addition, lifting code 1
The vertical swing of 0 is absorbed by the hold spring 16 and is not transmitted to the carriage 14, so that the carriage 14 can be moved smoothly in the moving direction of the lifting cord 10.

(5) When the lifting cord 10 is pulled out and the slat 3 is pulled up, the lifting cord 10 moves without rubbing against the slip stopper 23 of the stopper cam 21.
Wear of the lifting cord 10 can be suppressed.

(6) When lowering the slat 3 by its own weight,
Since the elevating cord 10 moves without rubbing against the non-slip 23 of the stopper cam 21, wear of the elevating cord 10 can be suppressed.

(7) During the pulling operation of the slat 3, the lifting cord 10 moves without rubbing against the non-slip 23 of the stopper cam 21, so that the operation force required for the slat pulling operation can be reduced.

(8) The carriage 14 moves via the hold spring 16 which moves integrally with the lifting cord 10. Therefore,
Until the movement of the carriage 14 is prevented, the movement distance of the lifting cord 10 and the movement distance of the carriage 14 are substantially equal. Therefore, after the slat 3 is pulled up, the stopper cam 2
It is possible to reduce the return amount of the lifting cord 10 until the operation of the slat 3 prevents the slat 3 from descending under its own weight. Therefore, fine adjustment of the suspension height of the slat 3 becomes easy. (Second Embodiment) A second embodiment in which the present invention is embodied in a pleated curtain will be described below with reference to the drawings. The pleated curtain shown in FIG.
Curtain material 32 that can be folded in zigzag from 1
Are suspended and supported, and a bottom rail 33 is attached to a lower end of the curtain member 32. A lifting cord 34 is inserted through at least both sides of the curtain member 32, and the lower end of the lifting cord 34 is connected to the bottom rail 33.

The upper end of the lifting / lowering cord 34 is guided into the head box 31, and the front end of one side of the head box 31 is passed through a self-weight drop prevention device 35 provided at one end of the head box 31. And is connected to a code equalizer 36.

Then, when the operation cord 37 suspended and supported below the cord equalizer 36 is pulled downward and the lifting cord 34 is pulled out of the head box 31, the bottom rail 33 is pulled up, so that the curtain material 32 is moved upward. Be folded. At this time, if the pull-out operation of the lifting cord 34 is stopped and the operation cord 37 is released, the self-weight drop prevention device 35 is activated, and the self-weight drop of the curtain material 32 and the bottom rail 33 is prevented.

When the operation code 37 is slightly pulled downward from the state in which the self-weight drop prevention device 35 is operated and the lifting code 34 is pulled out of the head box 31, the operation of the self-weight drop prevention device 35 is released. And curtain material 3
2 and the bottom rail 33 can be lowered by their own weight.

The specific structure of the self-weight drop prevention device 35 will be described. As shown in FIG.
In the case 38 of the fifth embodiment, the carriage 39 is
Is formed movably in the longitudinal direction, and an insertion portion 40 is formed at an upper portion of the carriage 39 so as to allow the lifting cord 34 to be inserted therethrough. A pulley 41 is rotatably supported at an end of the case 38 on the cord equalizer 36 side.

That is, in this embodiment, the lifting cord 34 guided into the head box 31 is inserted into the insertion portion 40 above the carriage 39 and connected to the code equalizer 36 via the pulley 41. ing.

The rear side of the carriage 39 (the side of the carriage 39 on the side of the pulley 41)
A tension plate 42 is disposed above the insertion portion 40 in the above. This tension plate 42
Is an elastic metal plate having an upper portion 43 and side portions 44a and 44b as shown in FIG.
The upper portion 43 between 4b is extended and bent obliquely downward to form a pressing portion 45.

The tension plate 42 has both sides 44a, 44b at the support portions 46a, 46b of the carriage 39.
By being attached to b, it is immovably supported by the carriage 39 in the longitudinal direction of the head box 31. Then, as shown in FIG.
The pressing portion 45 presses the lifting cord 34 inserted through the insertion portion 40 of the carriage 39 against the carriage 39 by its elastic force. The pressing portion 45 can be bent in a direction away from the carriage 39.

Therefore, as in the first embodiment,
When a predetermined frictional force acts between the pressing portion 45 and the elevating cord 34, and the elevating cord 34 moves in the case 38,
The carriage 39 is moved together with the tension plate 42. Further, when the movement of the carriage 39 in the case 38 is prevented, the movement of the tension plate 42 is prevented, so that the lifting / lowering cord 34 moves with friction with the pressing portion 45.

The front side of the truck 39 (the truck 3 in FIG. 9).
A stopper cam 47 is movably supported on (left side of 9). The stopper cam 47 has shaft pieces 48a and 48b as shown in FIG. 11, and the diameter of the shaft piece 48a is formed to be smaller than the diameter of the shaft piece 48b.
In addition, the stopper cam 4 above the shaft piece 48a
A gear-shaped non-slip 49 facing the upper part 38 a of the case 38 is formed on the upper part of the case 7. Therefore, FIG.
The stopper cam 47 and the upper part 3 of the case 38 as shown in FIG.
Even if the lifting / lowering cord 34 is further moved in the direction of lowering the curtain material 32 in a state where the lifting / lowering cord 34 is sandwiched between the lifting / lowering cord 8a and the moving member 8a, further movement of the lifting / lowering cord 34 is prevented.

The carriage 39 has the stopper cam 4
Slots 50a, 50b supporting the shaft pieces 48a, 48b of No. 7
Are formed, and as shown in FIG.
It is formed in a state rotated by 90 degrees with respect to b. That is,
The stopper cam 47 moves together with the carriage 39, and along with the movement, the shaft pieces 48a, 48b move in the elongated holes 50a, 50b.

As shown in FIGS. 9 and 10, the shaft piece 48b of the stopper cam 47 is provided on the inner surface of the case 38.
Is formed. Therefore, FIG.
When the carriage 39 advances toward the stopper cam 47 from the state where the shaft piece 48b is located at the left end of the elongated hole 50b as shown in FIG. 0, the stopper cam 47 moves integrally with the carriage 39 and the holding piece 51 When the shaft piece 48b is held,
Further movement of the stopper cam 47 is prevented,
The shaft piece 48b moves toward the right end of the long hole 50b.

When the shaft piece 48b moves from the left end to the right end of the long hole 50b, the shaft piece 48a moves to the long hole 50a.
9, the stopper cam 47 is turned upward as shown in FIG. 9, and the non-slip 49 of the stopper cam 47 is opposed to the upper portion 38a of the case 38. .

A cam mechanism 54 comprising a cam shaft 52 and a guide groove 53 is formed between the carriage 39 and the case 38, as in the first embodiment. With this movement, the cam shaft 52 is stopped or held at each of the positions P1 to P4 while sequentially rotating the cam shaft 52 at the first to fourth positions in the order of P1 to P4.

In the self-weight descent prevention device thus configured, as shown in FIG. 9, when the lifting cord 34 is sandwiched between the stopper cam 47 and the upper part of the case 38, the curtain material 32 The movement of the lifting / lowering cord 34 in the direction of lowering the position is prevented. At this time, the cam shaft 52 is located at the first position P1.

Then, the lifting cord 34 is slightly pulled out of the head box 31 from this state, and then the lifting cord 34 is released to release the curtain material 32 and the bottom rail 3.
3 and the lifting / lowering cord 34 by the weight of the head box 31
The carriage 39 moves in the same direction as the moving direction of the elevating cord 34, and the cam shaft 5 is moved based on the movement.
2 reaches the third position P3 from the first position P1 via the second position P2.

As shown in FIG. 10, in this state, similarly to the first embodiment, the holding of the lifting cord 34 by the stopper cam 47 is maintained in a released state. The curtain member 32 can be lowered to a desired position by its own weight of 33.

After the curtain material 32 has been lowered to the desired position and the lifting cord 34 is pulled out, the carriage 39 moves in the same direction as the moving direction of the lifting cord 34, and the cam shaft 52 is moved based on the movement. It moves from the third position P3 to the fourth position P4.

In this state, the bogie 39 is located at the right end of the case 38 (the position of the chain line C shown in FIG. 10), and the stopper cam 47 is maintained in a state where the holding of the lifting cord 34 is released. As in the first embodiment, the lifting cord 34 can be pulled out of the head box 31 and the curtain material 32 can be pulled up to a desired position.

After the curtain material 32 is pulled up to a desired position, the lifting cord 34 is released, and the curtain material 3 is released.
2 and the weight of the bottom rail 33,
Is drawn into the head box 31, and the carriage 39 moves in the same direction as the moving direction of the lifting / lowering cord 34.

Then, as shown in FIG. 9, the stopper cam 47 pivots upward to clamp the lifting cord 34 between the stopper cam 47 and the upper part of the case 38, thereby preventing the movement of the lifting cord 34 in the same direction. So that the curtain material 32 and the bottom rail 3
3 own weight descent is prevented.

At this time, the cam shaft 52 moves from the fourth position P4 to the first position P1 and stops. With the pleated curtain lifting / lowering device configured as described above, the following operational effects can be obtained.

(1) Connect the lifting cord 34 to the head box 3
The curtain material 32 can be pulled up to a desired position by pulling the curtain material 32 from the position 1. (2) Following the lifting operation of the curtain material 32, when the lifting cord 34 is released, the stopper cam 47 and the case 38 are released.
The lifting cord 34 is sandwiched between the upper part 38a and the upper part 38a,
The movement of the lifting cord 34 due to the weight of the curtain material 32 and the bottom rail 33 is prevented. Therefore, lifting code 3
By releasing 4, the operation of preventing the curtain material 32 from falling by its own weight can be easily performed.

(3) When the lifting / lowering cord 34 is slightly pulled and released when the curtain member 32 is prevented from falling under its own weight, the curtain member 32 and the bottom rail 33 can be lowered by their own weight.

(4) The pressing portion 45 of the tension plate 42 for pressing the lifting cord 34 against the carriage 39 is disposed so as to be able to bend upward. Therefore, even if the lifting / lowering cords 34 are vertically overlapped between the pressing portion 45 and the carriage 39, the lifting / lowering cords 34 can be securely clamped.

(5) When the lifting cord 34 is pulled out and the curtain material 32 is pulled up, the lifting cord 34 moves without rubbing against the non-slip 49 of the stopper cam 47, so that the wear of the lifting cord 34 can be suppressed. .

(6) When the curtain material 32 is lowered by its own weight, the lifting cord 34 is attached to the stopper cam 47
9 can be moved without being rubbed with each other, so that abrasion of the lifting cord 34 can be suppressed.

(7) At the time of raising the curtain material 32, the lifting cord 34 is used to prevent the stopper cam 47 from slipping.
Since it moves without rubbing with 9, the operation force required for the raising operation of the curtain member 32 can be reduced.

(8) The carriage 39 moves via the tension plate 42 which moves together with the lifting cord 34. Therefore, until the movement of the carriage 39 is prevented, the movement distance of the lifting cord 34 and the movement distance of the carriage 39 become substantially equal. Therefore, after the curtain material 32 is pulled up, the stopper cam 47 is operated to activate the curtain. The amount of return of the lifting cord 34 until the weight 32 of the member 32 is prevented from falling can be reduced. Therefore, fine adjustment of the suspension height of the curtain member 32 is facilitated.

(9) The lifting cord 34 inserted into the self-weight drop prevention device 35 is supported by the carriage 39 while maintaining its height position. That is, the lifting / lowering cord 34 guided into the head box 31 is inserted into the insertion portion 40 on the top of the carriage 39.
And is connected to a cord equalizer 36 via a pulley 41, and a stopper cam 47 disposed below the lifting cord 34 allows an upper part 38 of a case 38 to be connected.
a. Therefore, since the height dimension can be reduced as compared with the self-weight drop prevention device 11 in the first embodiment, the head box is not provided with an angle adjusting shaft for adjusting the angle of the shielding member. This configuration is particularly useful when applied to such a pleated curtain.

The above embodiments can be modified as follows. -The elevating device in the first embodiment may be applied to an elevating device that elevates and lowers a curtain fabric of a lift-up curtain or a pleated curtain. The lifting device according to the second embodiment may be applied to a lifting device that lifts and lowers a slat of a horizontal blind. The stopper cam 47 according to the second embodiment may be rotatably supported by the case 38 and may be rotated based on the movement of the carriage 39.

[0089]

As described above in detail, the present invention can provide a shielding member lifting / lowering device for a solar radiation shielding member capable of suppressing abrasion of the lifting / lowering cord.

[Brief description of the drawings]

FIG. 1 is a front view showing a horizontal blind.

FIG. 2 is a sectional view showing a slat elevating device.

FIG. 3 is an exploded perspective view showing a main part of the lifting device.

FIG. 4 is a bottom view of the bogie showing a guide groove.

FIG. 5 is a sectional view showing the operation of the lifting device.

FIG. 6 is a sectional view showing the operation of the lifting device.

FIG. 7 is a sectional view showing the operation of the lifting device.

FIG. 8 is a front view of a pleated curtain showing a second embodiment.

FIG. 9 is a cross-sectional view illustrating an elevating device according to a second embodiment.

FIG. 10 is a cross-sectional view illustrating the operation of the lifting device according to the second embodiment.

FIG. 11 is an exploded perspective view showing a main part of an elevating device according to a second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Head box 2 Solar shading material (slat) 10 Elevating cord 21 Clamping means (stopper cam)

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Eiji Kawai 1-1-1, Kaigan, Minato-ku, Tokyo Tachikawa Bra Indian Industrial Co., Ltd. F-term (reference) 2E043 AA01 AA04 BB02 BC02 BE11 CA05 DA01 DA05 DA06

Claims (8)

[Claims] An elevating cord is pulled out of a head box so that a solar shading material suspended from the head box can be pulled up, and the elevating cord is inserted into the head box based on a weight of the solar shading material. The solar shading material can be lowered by being retracted, and the head box includes a lifting operation and a lowering operation of the solar shading material, and a self-weight descent preventing operation for preventing a lowering based on the weight of the solar shading material. In a shielding material elevating / lowering device of a solar shading device provided with a self-weight descent prevention device capable of selecting either one, the self-weight descent prevention device sandwiches the lifting / lowering cord at the time of the self-weight descent prevention operation and prevents the movement thereof. A shielding material lifting / lowering device for a solar radiation shielding device, wherein the holding means is separated from the lifting / lowering cord except at the time of its own weight lowering prevention operation. 2. A trolley moving within the case in accordance with movement of the lifting cord, the holding means can be moved between a lifting operation position and a lowering operation position of the solar shading material and a self-weight drop prevention operation position. And between the carriage and the case, between the operation position of the carriage, the first position to perform a self-weight drop prevention operation based on the operation of the lifting code, the second position to release the self-weight drop prevention operation 2. The solar shading according to claim 1, further comprising a cam mechanism that can be sequentially switched to a third position where the slat descending operation is allowed and a fourth position where the slat lifting operation is allowed. Equipment for raising and lowering the shielding material. 3. The shielding material lifting / lowering device for a solar radiation shielding device according to claim 2, wherein said holding means is rotatably supported by said own weight descent prevention device. 4. The truck is provided with a hold spring that clamps the lift code with a predetermined frictional force, and moves the lift spring within the operation range of the cam mechanism with movement of the lift code. The shielding material lifting / lowering device for a solar radiation shielding device according to any one of claims 2 to 3, wherein the device is movable together with. 5. The apparatus according to claim 4, wherein the hold spring allows the up-down cord to be pinched while allowing the up-down movement of the up-down cord. . 6. The hold spring has a pair of pressing portions bent in a cylindrical shape, the lifting cord can be sandwiched between the pair of pressing portions, and the bogie has a chevron portion that projects between the pressing portions and positions the hold spring. The shielding material elevating device of the solar radiation shielding device according to claim 5, wherein the shielding material elevating device is provided. 7. The carriage has an insertion portion through which the elevation code can be inserted while maintaining the height position of the elevation code guided in the head box, and the insertion section is provided below the elevation code. 3. A device for raising and lowering a shielding material of a solar shading device according to claim 2, wherein the clamping means is movably supported. 8. The cart is provided with a tension plate for pressing the lifting cord with a predetermined frictional force on the cart,
The shielding member lifting / lowering device for a solar radiation shielding device according to claim 7, wherein the carriage can be moved within an operation range of the cam mechanism with movement of the lifting / lowering cord.