JP6231371B2 - Solar shading device - Google Patents

Description

  The present invention relates to a solar shading device that lifts and lowers a solar shading material by a lifting cord such as a roll-up blind, a horizontal blind, a scooping curtain, and a pleated screen.

In the solar shading device, as shown in FIGS. 20 to 21 of Patent Document 1, one end of the lifting / lowering cord is attached to the back of the head box, and the other end of the lifting / lowering cord is provided at the lower end of the screen. Some are attached to the take-up shaft in the head box so as to be able to take up through the lower portion of the weight bar. In such a solar shading device, when the lifting / lowering cord is wound around the winding shaft, the screen is wound around the weight bar and the screen is lifted. Conversely, when the lifting / lowering cord is rewound from the winding shaft, the lifting / lowering cord is weighted. The screen is lowered by rewinding from the bar.
In such a solar shading device, the lifting / lowering cord has a loop shape, and is provided with a cord joint that is separated when an excessive tension exceeding normal tension acts on the lifting / lowering cord. When a child or the like is caught on the lifting / lowering cord, safety is ensured by separating the cord joint.

WO2011 / 129345

  Even with the technology of Patent Document 1, safety is ensured at a high level. However, to improve safety, the holding force of the cord joint is weakened so that the cord joint is separated with the lowest possible tension. That's fine. However, if the holding force of the cord joint is too weak, the cord joint is easily separated even during normal use, and the usability during normal use is deteriorated.

  This invention is made | formed in view of such a situation, and provides the solar radiation shielding apparatus by which safety | security was improved, without deteriorating a usability | use_condition.

  According to the present invention, there is provided a solar shading device that lifts and lowers the solar shading material with a lifting cord, wherein the lifting cord is configured such that the holding force rises when the solar shading material starts to rise or during the ascent. There is provided a solar shading device comprising a unit.

  The present inventor has intensively studied to develop a solar shading device excellent in usability and safety, and has found that the tension applied to the lifting cord increases as the solar shading material rises. Also, I noticed that short users such as children are likely to get caught in the lifting cord when the solar shading material is in a low position.

  And considering these findings together, when the solar radiation shielding material is in a low position by configuring the connecting portion provided in the lifting / lowering cord so that the holding power is increased at the start of raising the solar radiation shielding material or in the middle of the ascent Increase the safety of the connecting part by lowering the holding power of the connecting part, and when the solar shading material is at a high position, use the connecting part with a higher holding power to withstand the tension applied to the lifting cord at that height position The present inventors have come up with the idea that the feeling can be enhanced.

Hereinafter, various embodiments of the present invention will be exemplified. The following embodiments can be combined with each other.
Preferably, the connecting portion is configured such that the holding force changes as the moving member in the connecting portion moves.
Preferably, the moving member is configured to move by the action of at least one of gravity and magnetic force.
Preferably, the connecting portion is configured such that the holding force changes in accordance with rotation of a drive shaft for winding the lifting / lowering cord around a winding shaft.
Preferably, a slide member that slides with the rotation of the drive shaft and acts on the connecting portion to change the holding force of the connecting portion is provided.
Preferably, the slide member is engaged with the connecting portion so as to suppress elastic deformation of the connecting portion and changes the holding force of the connecting portion.
Preferably, the connecting portion is configured such that the holding force changes according to a height position of the connecting portion.
Preferably, a height detection member is provided that acts on the connecting portion when the connecting portion reaches a predetermined height position and changes the holding force of the connecting portion.
Preferably, the height detection member is engaged with the connecting portion to change the holding force so as to suppress elastic deformation of the connecting portion.
Preferably, the connecting portion is configured such that the holding force changes with the movement of the moving member in the connecting portion, and the height detecting member and the moving member have the connecting portion at a predetermined height position. When reaching the position, the holding force of the connecting portion is changed by moving the moving member by the magnetic force between the height detecting member and the moving member.

The structure of the roll-up blind of 1st Embodiment of this invention is shown, (a) is a front view, (b) is a right view, (c) is an expanded sectional view of the connection part 17 of a low holding force state. 1A and 1B show a state in which the screen 4 is raised, FIG. 1A is a front view, FIG. 1B is a right side view, and FIG. 3C is an enlarged sectional view of the connecting portion 17 in a high holding force state. FIG. 2 shows a state in which the screen 4 is lifted from FIG. 2, (a) is a front view, (b) is a right side view, and (c) is a perspective view of a guide member. It is a disassembled perspective view which shows the structure of the connection part 17 of FIG. The 1st fitting part 43a of FIG. 4 is shown, (a) is a front view, (b) is a top view, (c) is a side view, (d) is CC sectional drawing in (a). 4 shows the connecting member 42 of FIG. 4, (a) is a front view, (b) is a rear view, (c) is a DD cross-sectional view in (a), and (d) is an EE in (a). Sectional drawing, (e) is FF sectional drawing in (c), (f) is sectional drawing which shows a fitting state with the 1st fitting part 43a. In the roll-up blind of 1st Embodiment of this invention, it is a right view which shows the position of the connection part 17 when the screen 4 raises in order of (a)-(d). 1 shows a state in which a foreign object W is caught on the lifting cord 7 of the roll-up blind in the state of FIG. 1, (a) is a front view, (b) is a right side view, and (c) is a state of the connecting portion 17 in a low holding force state. It is an expanded sectional view. The state after the connection part 17 was isolate | separated from the state of FIG. 8 is shown, (a) is a front view, (b) is a right view. The structure of the roll-up blind of the modification 1 of 1st Embodiment of this invention is shown, (a) is a front view, (b) is a right view, (c) is an expanded cross section of the connection part 17 of a low holding force state. FIG. 10A and 10B show a state in which the screen 4 is raised, FIG. 10A is a front view, FIG. 10B is a right side view, and FIG. 10C is an enlarged sectional view of the connecting portion 17 in a high holding force state. The structure of the connection part 17 of the modification 2 of 1st Embodiment of this invention is shown, (a) shows a low holding force state, (b) shows a high holding force state. The structure of the solar radiation shielding apparatus of 2nd Embodiment of this invention is shown, (a) is a left view, (b)-(c) is a front view which shows the state before and after the connection part 17 is isolate | separated. It is a front view which shows the state after the raising / lowering cord 7 was wound up by the winding shaft 10 from the state of FIG. The structure of the raising curtain of 3rd Embodiment of this invention is shown, (a) is a right view, (b) is an expanded sectional view of the connection part 17 of a low holding force state. FIGS. 15A and 15B show a state immediately after the lifting / lowering cord 7 starts to be pulled up from the state of FIG. 15, where FIG. 15A is a right side view and FIG. 15B is an enlarged cross-sectional view of the connecting portion 17 in a high holding force state. The structure of the raising curtain of 4th Embodiment of this invention is shown, (a)-(b) is a right view which shows the state before and after the connection part 17 is isolate | separated. FIG. 18 is a right side view showing a state in which the connecting portion 17 is pulled up to the position of the ring 18 and engaged with the ring 18 from the state of FIG. 17. The structure of the raising curtain of the modification 1 of 4th Embodiment of this invention is shown, (a)-(b) is the right side which shows the state in which the connection part 17 is a low holding force state and a high holding force state, respectively. FIG. The structure of the raising curtain of the modification 2 of 4th Embodiment of this invention is shown, (a) is a right view, (b) is an expanded sectional view of the connection part 17 of a low holding force state. The state which raised the connection part 17 from the state of FIG. 20 is shown, (a) is a right view, (b) is an expanded sectional view of the connection part 17 of a high holding force state. It is a front view which shows the structure of the solar radiation shielding apparatus of the modification 1 of 2nd Embodiment of this invention. It is a front view which shows the state after the raising / lowering cord 7 was wound up by the winding shaft 10 from the state of FIG. It is a front view which shows the structure of the solar radiation shielding apparatus of the modification 2 of 2nd Embodiment of this invention. It is a front view which shows the state after the raising / lowering cord 7 was wound up by the winding shaft 10 from the state of FIG.

  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>
In the roll-up blind of this embodiment shown in FIGS. 1 to 9, the screen 4 is suspended from the head box 1 and a weight bar 5 is attached to the lower end of the screen 4.

  One end of the lifting / lowering cord 7 is attached to the back surface 1 a of the head box 1, and the other end is guided to the head box 1 side through the lower portion of the weight bar 5. On the front side of the head box 1, a support member 101 that supports the guide members 8a and 8b and a support member 10r that supports the guide member 8b and the stopper 24 are attached. The lifting code 7 on the left side of FIG. 1A is turned by the guide member 8a, passes through the stopper 24, and hangs down as the operation portion 7a. A grip member 9 is provided at the distal end of the operation portion 7a of the lifting / lowering cord 7 so that the operation portion 7a can be easily grasped. On the other hand, the right elevating cord 7 in FIG. 1A is turned by the guide member 8b and led to the guide member 8c, is turned again by the guide member 8c and led to the stopper 24, and is hung as the operation portion 7a. The The elevating cord 7 is hung on the guide member 8c because the length of the elevating cord 7 between the guide member 8b and the stopper 24 is lengthened so that the connecting portion 17 described later becomes a guide member 8b as shown in FIG. This is to prevent the stopper 24 from reaching the stopper 24 and being caught by the stopper 24 after being turned. Note that the handling of the lifting / lowering cord 7 in this embodiment is an example. For example, when the stopper 24 configured to allow the connecting portion 17 to pass is used, the lifting / lowering cord 7 is directly guided from the guide member 8b to the stopper 24. Also good.

  The stopper 24 has a function of holding the lifting / lowering cord 7 when the lifting / lowering cord 7 is not operated to prevent the weight bar 5 and the screen 4 from falling by its own weight, and releasing the holding of the lifting / lowering cord 7 when the lifting / lowering cord 7 is operated.

  When the operation portion 7a is pulled down, the length of the portion of the lifting / lowering cord 7 that holds the screen 4 is shortened as shown in FIGS. 2 to 3, and the screen 4 is wound around the weight bar 5 accordingly. As a result, the lower end of the screen 4 rises. Since the screen 4 is suspended from the head box 1, almost the entire weight of the screen 4 is supported by the head box 1 when the screen 4 is not wound around the weight bar 5. On the other hand, the weight of the portion 4 a wound around the weight bar 5 of the screen 4 is supported by the lifting cord 7. For this reason, the tension applied to the screen 7 increases as the screen 4 is wound around the weight bar 5 and rises.

  The lifting / lowering cord 7 is provided with a connecting portion 17. When excessive tension exceeding the normal tension is applied to the lifting / lowering cord 7, the lifting / lowering cord 7 is divided at the connecting portion 17 so that safety is ensured. It has become.

  Here, the detailed structure of the connection part 17 is demonstrated using FIGS.

  As shown in FIG. 4, the connecting portion 17 has a configuration in which two first fitting portions 43 a and 43 b are connected by a cylindrical connecting member (second fitting portion) 42. The basic configuration of the two first fitting portions 43a and 43b is the same, but one first fitting portion 43a can slide the cylindrical moving member 40 to the round shaft-like fitting protrusion 45. It differs from the 1st fitting part 43b in the point by which the moving member accommodating part 29 accommodated in is provided. The length of the moving member accommodating portion 29 in the depth direction is longer than the length of the moving member 40 in the height direction (for example, 1.5 times or more, preferably 2 times or more).

  The first fitting portions 43a and 43b are formed at the end portion of the elevating cord 7 with a synthetic resin. The base end portions of the first fitting portions 43a and 43b are formed in a hemispherical shape, and a round shaft-like fitting protrusion 45 is formed at the tip portions of the first fitting portions 43a and 43b.

  As shown in FIGS. 4 to 5, an enlarged diameter portion 46 is formed in line symmetry with respect to the center of the round shaft on the outer peripheral surface of the distal end portion of the fitting protrusion 45, and the middle of the enlarged diameter portion 46. Each is formed with a recess 47 having a semicircular cross section.

  As shown in FIGS. 4 to 5, a rotation restricting portion 48 that protrudes in the radial direction of the round shaft is formed on the base end portion of the fitting protrusion 45 in a line-symmetric manner with respect to the center. Each rotation restricting portion 48 is formed at a position 45 degrees away from the recess 47 in the circumferential direction with respect to the center of the round shaft.

  The connecting member 42 is formed as a second fitting portion formed in a cylindrical shape with the same synthetic resin as the first fitting portions 43a and 43b and provided with a fitting hole, as shown in FIGS. The openings 49a and 49b on both sides are formed in a bowl shape that allows insertion of a tip portion including the enlarged diameter portion 46 of the fitting projection 45. In addition, the openings 49a and 49b have shapes in which the direction of the bowl shape is rotated 90 degrees with respect to the center of the cylinder.

  A circular hole 50 having a diameter that allows the distal end of the fitting protrusion 45 to turn is formed inside the connecting member 42. And the latching | locking part 51a, 51b which prevents the detachment from the circular hole 50 of the enlarged diameter part 46 of the 1st fitting part 43a is each formed in the opening edge of the bowl-shaped short-axis direction of the opening part 49a. Locking portions 51c and 51d that prevent the bulging portion 46 of the first fitting portion 43b from coming out of the circular hole 50 are formed at the opening edge in the short axis direction of the bowl-shaped portion 49b.

  In addition, on the inner side of the locking portions 51a and 51c, protrusions 52 that engage with the recesses 47 are formed on the inner peripheral surface of the circular hole 50, respectively. In order to connect the first fitting portions 43a and 43b and the connecting member 42, the fitting protrusion 45 of the first fitting portion 43a is inserted into the opening 49a of the connecting member 42, and the first fitting portion 43a is inserted. It rotates 90 degrees clockwise with respect to the connecting member 42. Then, the recess 47 of the fitting protrusion 45 is engaged with the protrusion 52 in the circular hole 50, and the rotation restricting portion 48 is moved from the bowl-shaped corner of the opening 49a to the adjacent corner, Positioning is performed as shown in FIG.

  Similarly, the fitting protrusion 45 of the first fitting portion 43b is inserted into the other opening 49b of the connecting member 42 and rotated 90 degrees for positioning. Then, as shown in FIG.1 (c) and FIG.2 (c), the 1st fitting parts 43a and 43b are connected via the connection member 42. FIG.

  In this state, the enlarged diameter portion 46 of the fitting protrusion 45 of the first fitting portions 43 a and 43 b engages with the locking portions 51 a to 51 d of the connecting member 42 and is held in the circular hole 50 of the connecting member 42. Is done. Moreover, the outer shape in the state which fitted the 1st fitting part 43a, 43b on the both sides of the connection member 42 is formed so that it may become an elliptical ball shape.

  When the fitting projection 45 of the first fitting portion 43a faces upward as shown in FIG. 1C, the moving member 40 moves to a position away from the tip of the fitting projection 45. The connecting portion 17 is in a low holding force state. On the other hand, when the fitting protrusion 45 of the first fitting portion 43a faces downward as shown in FIG. 2 (c), the moving member 40 moves to substantially the tip of the fitting protrusion 45. The connecting portion 17 is in a high holding force state. Thus, whether the connecting portion 17 is in the high holding force state or the low holding force state is determined by the direction in which the fitting protrusion 45 of the first fitting portion 43a faces.

  As shown in FIGS. 1 and 7A, the connecting portion 17 is in a low holding force state as shown in FIG. 1C while the connecting portion 17 is on the back side of the screen 4. Then, the connecting portion 17 is lowered as the screen 4 is raised, and the connecting portion 17 passes through a transition state immediately below the weight bar 5 as shown in FIG. It becomes a state. When the screen 4 is further raised from the state of FIG. 7C, the connecting portion 17 is raised accordingly, and the fully opened state shown in FIGS. 3 and 7D is obtained. In the state of FIG.7 (c)-FIG.7 (d), the connection part 17 is a high holding force state as shown in FIG.2 (c). 3 and 7D, the connecting portion 17 is between the support member 101 and the support member 10r as shown in FIG. 3A. In this state, the connecting portion 17 is low. The elevating cord 7 is inclined between the support member 101 and the support member 10r so as not to be in a holding force state. Further, as shown in FIG. 3C, the guide members 8a, 8b, and 8c are composed of a support shaft 58a and a rotation member 58b that is rotatably supported by the support shaft 58a, and is arranged on the outer periphery of the rotation member 58b. The connecting portion contact surface 58c having a shape along the outer shape of the connecting portion 17 and the groove-shaped lifting / lowering code contact surface 58d are provided at different height positions. When the connecting portion 17 passes through the guide members 8a, 8b, and 8c, the lifting / lowering cord 7 is in contact with the lifting / lowering cord contact surface 58d while the connecting portion 17 is in contact with the connecting portion contact surface 58c. The portion 17 is smoothly guided between the support member 10l and the support member 10r. The shape of the outer peripheral member of the rotating member 58b can be changed as appropriate.

  As the screen 4 rises, the tension applied to the lifting / lowering cord 7 increases. Therefore, when the connecting portion 17 is in the low holding force state, the maximum tension T1 applied to the lifting / lowering cord 7 by the screen 4 and the weight bar 5 is when the connecting portion 17 is in the transition state shown in FIG. This is the tension applied to the lifting / lowering cord 7. Therefore, the holding force TW when the connecting portion 17 is in the low holding force state may be set so as not to be separated by the maximum tension T1, and therefore, the holding force TW> the maximum tension T1 is set.

  On the other hand, when the connecting portion 17 is in the high holding force state, the maximum tension T2 applied to the lifting / lowering cord 7 by the screen 4 and the weight bar 5 is when the screen 4 is fully open as shown in FIG. The tension applied to the lifting / lowering cord 7. Therefore, the holding force TS when the connecting portion 17 is in the high holding force state may be set so as not to be separated by the maximum tension T2, and therefore, the holding force TS> the maximum tension T2.

  If the holding force TP of the connecting portion 17 does not change as in the prior art, the holding force TP of the connecting portion 17 is the lowest in order to prevent the connecting portion 17 from being separated by the weight of the screen 4 and the weight bar 5. However, it is necessary to make the tension larger than the maximum tension T2, and in order to prevent the connecting portion 17 from being unexpectedly separated, for example, if a margin of double is provided, the holding force TP = 2 × the maximum tension T2 is required. . On the other hand, in the present embodiment, when a double margin is similarly given, the holding force TW = 2 × the maximum tension T1, the holding force TS = 2 × the maximum tension T2, and the maximum tension T1 <the maximum tension T2. It is possible to make the holding force TW in the low holding force state smaller than that in the prior art while making the holding force TS in the high holding force state the same as in the conventional case.

Next, the operation of the present invention will be described.
As shown in FIG. 8, it is assumed that the foreign matter W is caught in the loop of the lifting / lowering cord 7 when the lower end of the screen 4 is at a relatively low position and the connecting portion 17 is in a low holding force state. In this case, tension T is applied to the lifting / lowering cord 7 by the gravity applied to the foreign matter W. When the tension T is larger than the holding force TW in the low holding force state of the connecting portion 17, the lifting cord 7 is separated by the connecting portion 17 as shown in FIG. The When the magnitude of the tension T is larger than the holding force TP in the prior art, safety was ensured even in the configuration of the prior art, but when the magnitude of the tension T is smaller than the holding force TP in the prior art, In the configuration of the prior art, the lifting / lowering cord 7 may not be separated by the connecting portion 17. As described above, according to the configuration of the present embodiment, the loop of the lifting / lowering cord 7 is released even when a load smaller than that of the conventional case is applied, so that safety can be improved as compared with the conventional case.

Further, as shown in FIG. 2, when the lower end of the screen 4 is at a relatively high position and the connecting portion 17 is in a high holding force state, a short user such as a child is caught by the lifting cord 7. Therefore, there is no problem in safety even if the holding force of the connecting portion 17 is large, and the connecting portion 17 is not separated by the tension T2 applied to the lifting / lowering cord 7 by the screen 4 and the weight bar 5. Therefore, the lifting / lowering cord 7 is not unintentionally separated and the feeling of use does not deteriorate.
As described above, according to the present embodiment, safety can be improved without deteriorating the feeling of use.

The present invention can also be implemented in the following embodiments.
In addition to roll-up blinds, the present invention can also be applied to various solar shading devices (e.g., horizontal blinds, scooping curtains, pleated screens) that lift and lower the solar shading material using a lifting cord.
In the above embodiment, the fitting protrusions 45 of the first fitting portions 43a and 43b are inserted into the fitting holes of the connecting member 42, and both are fitted to each other by relative rotation. The fitting protrusions 45 of the first fitting parts 43a and 43b may be elastically fitted into the fitting holes of the connecting member 42 (that is, pushed in by applying a strong force).
In the above embodiment, the screen 4 is moved up and down by operating the operation unit 7a. However, by winding and unwinding the lifting / lowering cord 7 with respect to the winding shaft arranged in the head box 1. The screen 4 may be raised and lowered.
In the above embodiment, the holding force of the connecting portion 17 is changed by moving the moving member 40 by the action of gravity, but the moving member 40 may be configured to move by the action of magnetic force, You may comprise so that it may move by a mechanical mechanism.

<Variation 1 of the first embodiment>
In the said 1st Embodiment, the connection part 17 is arrange | positioned at the back side of the screen 4 in the low holding force state, and when the lower side of the screen 4 passes, the holding force of the connection part 17 changes. However, in this modification, as shown in FIG. 10, the connecting portion 17 is disposed on the front side of the screen 4 in the low holding force state, and when the connecting portion 17 passes through the guide members 8a and 8b, FIG. As shown to (c), the moving member 40 moves and it is comprised so that the connection part 17 may be in a high holding force state. Specifically, in the state shown in FIG. 10, since the fitting projection 45 of the first fitting portion 43 a faces upward, the moving member 40 is disposed at a position away from the tip of the fitting projection 45. Thus, the connecting portion 17 is in a low holding force state. On the other hand, in the state shown in FIG. 11, since the fitting protrusion 45 of the first fitting portion 43 a faces obliquely downward, the moving member 40 moves to the substantially tip of the fitting protrusion 45, and the connecting portion 17. Becomes a high holding force state.

<Modification 2 of the first embodiment>
In the said 1st Embodiment, although the connection part 17 is a 3 member structure which consists of 1st fitting part 43a, 43b and the connection member 42, in this embodiment, as shown in FIG. This is a two-member configuration including a first fitting portion 43 and a second fitting portion 46. The 1st fitting part 43 has the same composition as the 1st fitting part 43a of a 1st embodiment, the 2nd fitting part 46 is the 1st fitting part 43b of a 1st embodiment, The connecting member 42 is combined. Therefore, the fitting structure of the first fitting portion 43 and the second fitting portion 46 of the present embodiment is the same as the fitting structure of the first fitting portions 43a and 43b and the connecting member 42 of the first embodiment. .

  Even in the configuration of the present embodiment, whether the connecting portion 17 is in the high holding force state or the low holding force state is determined by the direction of the fitting protrusion 45 of the first fitting portion 43. Therefore, also in the present embodiment, as in the first embodiment, when the lower end of the screen 4 is at a relatively low position, the connecting portion 17 is in a low holding force state, and the lower end of the screen 4 is at a relatively high position. When the connecting portion 17 is in a high holding force state at a certain time, safety is improved without deteriorating the feeling of use.

Second Embodiment
In 1st Embodiment, the connection part 17 is provided so that the raising / lowering code | cord | chord 7 may be divided | segmented, the raising / lowering code | cord | chord 7 will be divided | segmented when the connection part 17 is isolate | separated, and the loop structure formed by the raising / lowering cord 7 will be cancelled | released. It was supposed to be. In this embodiment, the connection part 17 is provided in the edge part of the raising / lowering cord 7, and the connection part 17 is used in order to attach the raising / lowering code 7 to another member.

  Hereinafter, a specific configuration will be described with reference to FIGS. In the following description, description of points in common with the first embodiment will be omitted as appropriate.

  As shown in FIGS. 13 to 14, the solar shading apparatus of the present embodiment performs a method of winding and unwinding the lifting / lowering cord 7 with respect to the winding shaft 10 that is rotatably supported by the head box 1. For example, roll-up blinds, horizontal blinds, scooping curtains, and pleated screens. FIG. 13 shows a state in which the elevating cord 7 is completely rewound and the solar shading material is lowered to the lower limit position, and FIG. 14 shows the elevating cord 7 until the lower end of the solar shading material is at a relatively high position. Shows the state of being wound. In the state of FIG. 13, the tension applied to the lifting / lowering cord 7 by the solar shading material is relatively small, and a short user such as a child is easily caught on the lifting / lowering cord 7. On the other hand, in the state of FIG. 14, the tension | tensile_strength added to the raising / lowering cord 7 by a solar radiation shielding material is comparatively large.

  The winding shaft 10 is configured to rotate with the rotation of the drive shaft 12, and a screw member 13 that rotates with the rotation of the drive shaft 12 is attached to the drive shaft 12. A slide member 14 is attached to the screw member 13 so as to move in the arrow Y direction in FIG. 13B as the screw member 13 rotates in the winding direction of the lifting / lowering cord 7. The slide member 14 linearly moves relative to the screw member 13 by a screw feed mechanism.

  An engagement member 15 is attached to the head box 1. The engaging member 15 includes an arm 15b having an engaging portion 15a at the tip. One end of the lifting / lowering cord 7 is turned by the guide member 8e and attached to the winding shaft 10, and a connecting portion 17 is provided at the other end. The connecting portion 17 is attached to the lifting / lowering cord 7 by locking a locking portion (eg, knotted ball) 7 a provided on the lifting / lowering cord 7 to the connecting portion 17. The connecting portion 17 is turned by the guide member 8d and engaged with the engaging portion 15a, whereby the other end of the lifting / lowering cord 7 is attached to the head box 1. Specifically, the connecting portion 17 includes a main body portion 17a and a pair of arms 17b extending from the main body portion 17a, and the pair of arms 17b elastically sandwiches the engaging portion 15a, whereby FIG. As shown, the connecting portion 17 is engaged with the engaging portion 15a.

  In the state of FIG. 13B, the engagement between the pair of arms 17b and the engaging portion 15a is held only by the elastic force of the pair of arms 17b, and the connecting portion 17 has a low holding force. It is in a state. Then, when a foreign matter is caught on the loop structure formed by the lifting / lowering cord 7 and a tension T exceeding the holding force TW in the low holding force state of the connecting portion 17 is applied to the lifting / lowering cord 7, the pair of arms 17 b is shown in FIG. 13. By spreading in the arrow X direction of (b), the engagement between the pair of arms 17b and the engaging portion 15a is released, the loop structure formed by the elevating cord 7 is released, and safety is ensured.

Further, by rotating the drive shaft 12 in the arrow Z direction of FIG. 13B, the lifting cord 7 is wound around the winding shaft 10 and the slide member 14 is moved in the arrow Y direction. The slide member 14 includes an opening 14b of a size that can suppress the spread of the pair of arms 17b. As shown in FIG. 14, when the slide member 14 reaches the position of the connecting portion 17, the pair of arms 17b It arrange | positions in the opening part 14b and the breadth of a pair of arm 17b is suppressed. As a result, the engagement between the pair of arms 17b and the engaging portion 15a is not easily released, and the connecting portion 17 is in a high holding force state. Since the holding force TS of the connecting portion 17 in this state is larger than the maximum tension T2 applied to the elevating cord 7 by the solar shading material, the connecting portion 17 is not separated from the engaging portion 15a by the tension T2. The feeling of use does not deteriorate.
As described above, according to the present embodiment, safety can be improved without deteriorating the feeling of use.

The present invention can also be implemented in the following embodiments.
-The engagement structure between the connection part 17 and the engagement member 15 is not specifically limited, Another engagement structure may be sufficient. For example, a pair of arms may be provided on the engaging member 15 side, and the connecting portion 17 may be provided with a locking portion sandwiched between the pair of arms.

<Third Embodiment>
In the first and second embodiments, the end portion on the non-operating side of the lifting / lowering cord 7 is attached to the head box 1, but in this embodiment, the end portion on the non-operating side of the lifting / lowering cord 7 is shielded from sunlight. It is attached near the lower end of the material. In the first to second embodiments, the holding force of the connecting portion 17 is increased in the middle of the rising of the solar shading material. However, in this embodiment, the holding power at the start of the rising of the solar shading material. Rises.

  Hereinafter, a specific configuration will be described with reference to FIGS. In the following description, description of points in common with the first and second embodiments will be omitted as appropriate.

  In the raised curtain of this embodiment, the curtain fabric 34 is suspended and supported from the head box 1, and the weight bar 5 is attached to the lower end of the curtain fabric 34. Rings 18 are attached to the curtain fabric 34 at substantially equal intervals in the vertical direction. The lifting / lowering cord 7 has one end 7b attached near the lower end of the curtain fabric 34, and the other end inserted through the ring 18 toward the head box 1 (in the head box 1 or as in the first embodiment). Guided to the member attached to the box 1). A connecting portion 17 is provided in the vicinity of one end 7 b of the lifting / lowering cord 7. The structure of the connection part 17 is the same as that of 1st Embodiment.

  In FIG. 15, the curtain fabric 34 is in the lower limit position, and the elevating cord 7 is in a slack state where no tension is applied. In this state, the connecting portion 17 is in a low holding force state with the fitting protrusion 45 of the first fitting portion 43a facing upward. Moreover, in this state, since tension | tensile_strength is not added to the raising / lowering cord 7, the retention strength of the connection part 17 can be made very small and safety | security is improved.

  Next, when the raising / lowering cord 7 is operated from the head box 1 side by the operation method of the system as shown in the first or second embodiment and the raising operation of the curtain fabric 34 is started, as shown in FIG. The direction of the part 17 changes and the connection part 17 changes to a high holding force state.

<Fourth embodiment>
The present embodiment relates to a curtain that is squeezed like the third embodiment, but the configuration of the connecting portion 17 is different. In the following description, description of points in common with the first to third embodiments will be omitted as appropriate.
In this embodiment, the connection part 17 is provided in the edge part of the raising / lowering cord 7 similarly to 2nd Embodiment. Further, an engaging member 19 having an engaging portion 19 a is provided near the lower end of the curtain fabric 34 via the ring 20. The engaging structure of the connecting portion 17 and the engaging portion 19a is the same as the engaging structure of the connecting portion 17 and the engaging portion 15a in the second embodiment, and in the state of FIG. 17, the elastic force of the pair of arms 17b. In this state, the engagement between the pair of arms 17b and the engaging portion 19a is maintained, and the connecting portion 17 is in a low holding force state. When a foreign object is caught on the loop structure formed by the lifting / lowering cord 7, the ring 20, and the curtain fabric 34, the engagement between the connecting portion 17 and the engaging portion 19a is released, and the engaging member 19 is connected to the connecting portion. 17, the state shown in FIG. 17B is obtained, and safety is ensured.

  On the other hand, when the curtain cord 34 is raised by operating the lifting / lowering cord 7 from the head box 1 side, the position of the connecting portion 17 is also raised, and the connecting portion 17 becomes a ring (height detection member) 18 as shown in FIG. It will be in the state which entered into the opening part. In this state, the ring 18 prevents the pair of arms 17b from spreading. As a result, the engagement between the pair of arms 17b and the engaging portion 19a is not easily released, and the connecting portion 17 is in a high holding force state.

<Modification 1 of 4th Embodiment>
In the fourth embodiment, the connecting portion 17 is engaged with the ring 18 provided at the bottom, and the holding force of the connecting portion 17 is increased. However, the connecting portion 17 moves to a higher position. In some cases, the holding force of the connecting portion 17 may be increased. Therefore, in the present modification, as shown in FIG. 19A, the size of the opening of one or more (two in the present modification) ring 18w from the bottom is set to a size that does not engage with the connecting portion 17. Even if the connecting portion 17 reaches the position of the ring 18w, the holding force of the connecting portion 17 is not changed. And as shown in FIG.19 (b), the ring (height detection member) 18 arrange | positioned in the height position which wants to change the retention strength of the connection part 17 and the connection part 17 are set with 4th Embodiment. By similarly engaging, the holding force of the connecting portion 17 is increased. According to such a configuration, the holding force of the connecting portion 17 can be increased at an arbitrary height position.
In this modification, the ring 18 of the curtain is used as the height detection member for changing the holding force of the connecting portion 17 at a predetermined height position. However, the idea of this modification is a horizontal blind. When applying, the connection part 17 can be engaged with the raising / lowering cord insertion hole provided in the slat. That is, the slat can be used as a height detection member. For example, the slat lifting / lowering cord insertion holes from the bottom to the tenth stage are sized so as not to engage with the connecting portion 17, and then the connecting portion 17 is engaged with the lifting / lowering cord insertion hole of the slat to hold the connecting portion 17 By increasing the force, the holding force of the connecting portion 17 can be increased at the height position of the eleventh slat from the bottom.

<Modification 2 of 4th Embodiment>
In the present modification, the holding force of the connecting portion 17 is changed by the movement of the moving member 40 in the connecting portion 17 as in the first embodiment. However, in the first embodiment, the moving member 40 is moved by the action of gravity. However, in this embodiment, the moving member 40 is moved by the action of magnetic force and gravity.

Hereinafter, a specific configuration of the present modification will be described with reference to FIGS.
The basic configuration of this modification is the same as that of Modification 1 of the fourth embodiment, and a plurality of rings 18w and 18 are attached to the curtain fabric 34. The openings of one or more (two in this modification) ring 18w from the bottom are sized to pass through the connecting portion 17, and the opening of the ring 18 above is sized to engage with the connecting portion 17. It has become. A moving member 40 is disposed in the connecting portion 17. In the state of FIG. 20, the moving member 40 is disposed at a position away from the tip of the fitting protrusion 45 by the action of gravity, and the connecting portion 17 is in a low holding force state.

  When the curtain cord 34 is raised by operating the lifting / lowering cord 7 from the head box 1 side, the position of the connecting portion 17 is also raised, and after the connecting portion 17 passes through the two rings 18w, as shown in FIG. 18 abuts. The ring 18 and the moving member 40 are configured to be attracted to each other by magnetic force. Specifically, both the ring 18 and the moving member 40 are magnets, or either one is a magnet and the other is a metal that is attracted to the magnet. For this reason, when the connecting portion 17 is sufficiently close to the ring 18, the moving member 40 is lifted by the magnetic force and moved to substantially the tip of the fitting protrusion 45, and the connecting portion 17 is in a high holding force state. According to such a configuration, the holding force of the connecting portion 17 can be increased at an arbitrary height position.

<Modification Example 1 of Second Embodiment>
In this modification, a configuration in which the holding force of the connecting portion 17 is changed is applied to the solar radiation shielding device having the same basic structure as that of the second embodiment, based on the same principle as that of the modification 2 of the fourth embodiment. is there. However, in this modification, the moving member 40 is moved only by the action of magnetic force without using the action of gravity.
Hereinafter, a specific configuration of the present modification will be described with reference to FIGS.
The basic configuration of this modification is the same as that of the second embodiment, and the slide member 14 is configured to move in the arrow Y direction by the screw feed mechanism as the drive shaft 12 rotates. A moving member 40 is disposed in the connecting portion 17. The guide member 8d and the moving member 40 are configured to be attracted to each other by a magnetic force. With the action, the moving member 40 is disposed at a position away from the tip of the fitting protrusion 45 in the state of FIG. The connecting portion 17 is in a low holding force state.

  When the drive shaft 12 is rotated in the winding direction of the lifting / lowering cord 7, the slide member 14 moves in the arrow Y direction and approaches the connecting portion 17. The slide member 14 and the moving member 40 are configured to be attracted to each other by magnetic force. For this reason, when the slide member 14 is sufficiently close to the connecting portion 17 and the attractive force between the slide member 14 and the moving member 40 is larger than the attractive force between the guide member 8d and the moving member 40, the moving member 40 is fitted. It moves to substantially the tip of the mating protrusion 45, and the connecting portion 17 is in a high holding force state. According to such a configuration, the holding force of the connecting portion 17 can be increased at an arbitrary height position. When the drive shaft 12 is rotated in the reverse direction and the slide member 14 is moved in the direction opposite to the arrow Y, the attractive force between the slide member 14 and the moving member 40 gradually decreases, and the slide member 14 and the moving member 40 are reduced. When the attractive force between the guide member 8d and the moving member 40 becomes smaller, the moving member 40 again moves away from the tip of the fitting protrusion 45 as shown in FIG. The connecting portion 17 returns to the low holding force state.

  In addition, although the specific example which moves the moving member 40 by the attractive force by a magnetic force was demonstrated here, the moving member 40 can also be moved by the repulsive force by a magnetic force.

<Modification 2 of the second embodiment>
In this modification, the slide member 14 and the moving member 40 are attracted to each other by magnetic force, and the holding force of the connecting portion 17 is obtained by moving the moving member 40 by the attractive force between the slide member 14 and the moving member 40. To change.
Hereinafter, a specific configuration of the present modification will be described with reference to FIGS.
The basic configuration of this modification is the same as that of Modification 1 of the second embodiment, and the slide member 14 is configured to move in the arrow Y direction by the screw feed mechanism as the drive shaft 12 rotates. A moving member 40 is disposed in the connecting portion 17. The slide member 14 and the moving member 40 are configured to be attracted to each other by magnetic force. When the slide member 14 is in the position shown in FIG. 24, the moving member 40 is attracted to the slide member 14 so that the moving member 40 is It arrange | positions in the position away from the front-end | tip of the fitting protrusion 45, and the connection part 17 will be in a low holding force state.

  When the drive shaft 12 is rotated in the winding direction of the lifting / lowering cord 7, the slide member 14 moves in the arrow Y direction and passes through the connecting portion 17 as shown in FIG. At this time, the moving member 40 moves to substantially the tip of the fitting protrusion 45 as the slide member 14 moves, and the connecting portion 17 enters a high holding force state. According to such a configuration, the holding force of the connecting portion 17 can be increased at an arbitrary height position. When the drive shaft 12 is rotated in the reverse direction and the slide member 14 is moved in the direction opposite to the arrow Y, the moving member 40 moves to a position away from the tip of the fitting protrusion 45 along with this movement. The connecting portion 17 returns to the low holding force state.

1: Head box 4: Screen 5: Weight bar 7: Lifting cord 10: Winding shaft 12: Drive shaft 14: Slide member 17: Connecting portion 18: Ring 34: Curtain cloth 40: Moving member

Claims (10)

A solar shading device that lifts and lowers the solar shading material by a lifting cord;
The said raising / lowering cord is a solar radiation shielding apparatus provided with the connection part comprised so that a retention strength might raise in the raising start time of the said solar radiation shielding material, or in the middle of the raising. The solar radiation shielding device according to claim 1, wherein the connecting portion is configured such that the holding force changes as the moving member in the connecting portion moves. The solar radiation shielding device according to claim 2, wherein the moving member is configured to move by the action of at least one of gravity and magnetic force. The said connection part is comprised so that the said holding force may change with rotation of the drive shaft for winding up the said raising / lowering cord to a winding shaft. Solar shading device. The solar radiation shielding apparatus of Claim 4 provided with the slide member which slides with the rotation of the said drive shaft, and acts on the said connection part and changes the said holding force of the said connection part. The solar shading device according to claim 5, wherein the slide member is engaged with the connecting portion so as to suppress elastic deformation of the connecting portion to change the holding force of the connecting portion. The solar radiation shielding device according to any one of claims 1 to 6, wherein the connecting portion is configured such that the holding force changes according to a height position of the connecting portion. The solar radiation shielding apparatus of Claim 7 provided with the height detection member which acts on the said connection part and changes the said holding force of the said connection part when the said connection part reaches | attains predetermined | prescribed height position. The solar radiation shielding device according to claim 8, wherein the height detection member is engaged with the connecting portion to change the holding force so as to suppress elastic deformation of the connecting portion. The connecting portion is configured such that the holding force changes as the moving member in the connecting portion moves.
The height detecting member and the moving member are connected to each other by moving the moving member by a magnetic force between the height detecting member and the moving member when the connecting portion reaches a predetermined height position. The solar radiation shielding apparatus of Claim 8 or Claim 9 comprised so that the retention strength of a part may be changed.