JP2019157561A - Shielding device - Google Patents

Abstract

To provide a human-friendly pair-type shielding device that takes into account the characteristics of the human eye.SOLUTION: In a shielding device comprises an upper shielding material that shields between a head box 101 and an intermediate rail 103a, a lower shielding material that shields between the intermediate rail and the bottom rail 103b, and a dimming cord 104a and a lifting cord, the upper shielding material opens and closes with the movement of the dimming cord when the pulling amount of the dimming cord from the head box is changed, and the bottom rail moves up and down with the movement of the lifting cord. A first speed adjustment device is provided in the head box. The first speed adjustment device is configured to gradually change the dimming amount at a substantially constant pace by applying a braking force only to the dimming cord as the dimming cord moves in one direction, therefore, the shielding device that prevents a sudden change in the dimming amount is provided.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a shielding device, particularly a pair-type shielding device (described later).

  Various shielding devices such as roll curtains, blinds, accordion curtains, pleated screen doors and partitions are put into practical use. Among these, particularly as a horizontal blind or a pleated screen, a head box, an intermediate rail, and a bottom rail are provided, and shielding materials are provided between the head box and the intermediate rail, and between the intermediate rail and the bottom rail, respectively. There is a shielding device configured such that two shielding materials positioned side by side can be pulled out or folded up and down by raising and lowering the intermediate rail and / or the bottom rail by a cord pulling operation ( Patent Document 1). Hereinafter, two shielding devices having such a shielding material will be considered.

  In such a shielding apparatus, two cords are provided for pulling out or folding the two shielding materials up and down. Here, the cord relating to the upper shielding material is referred to as a first lifting / lowering cord (light control cord), and the cord relating to the lower shielding material is referred to as a second lifting / lowering cord (elevating cord). In a shielding device having one shielding material, an operation code for opening and closing (raising and lowering) the shielding material is provided. However, in the two shielding devices, the shielding material as handled in this specification is a lower shielding material. The 2nd raising / lowering code | cord | chord which is the code | cord | chord corresponds to an operation code | cord | chord.

JP 2008-088649 A

  By the way, there are two such shielding materials, and the shielding device (so-called direct pulling type shielding device) configured to be able to open and close the shielding material by directly pulling the cord is composed of an upper shielding material and a lower shielding material. It can be used to make the material different and realize a light amount preferable for the user. For example, in the case of a pleated screen, the upper shielding material may be a lace fabric, and the lower shielding material may be a drape fabric. In the daytime, use the upper shielding material (lace fabric) fully open to incorporate light, and at night, fully open the lower fabric (draped fabric) so that the interior of the room cannot be seen. And so on.

  It should be noted here that the human eye is vulnerable to rapid brightness changes. In particular, when trying to fully open the upper fabric (lace fabric) in order to take in light when waking up, there is a problem that the intermediate rail suddenly descends and feels very dazzling. Based on such problems, a more human-friendly shielding device is desired.

  The present invention has been made in view of such circumstances, and provides a more human-friendly shielding device that has two shielding materials and also takes into consideration the characteristics of the human eye.

  According to the present invention, comprising: an upper shielding material that shields between the head box and the intermediate rail; a lower shielding material that shields between the intermediate rail and the bottom rail; and a dimming cord and a lifting / lowering cord, In the shielding device in which the upper shielding member opens and closes with the movement of the dimming cord and the bottom rail moves up and down with the movement of the lifting and lowering cord when the amount of light control cord pulled out from the head box is changed, A first speed adjusting device is provided in the head box, and the first speed adjusting device applies a braking force only to the dimming cord as the dimming cord moves in one direction so that the dimming amount is substantially reduced. Provided is a shielding device that is configured to gradually change at a constant pace, thereby preventing a sudden change in light control amount.

  The shielding device according to the present invention has a dimming cord that opens and closes an upper shielding member that shields between the head box and the intermediate rail, and is configured to brake movement of the dimming cord accompanying opening and closing. A (first speed adjusting device) is provided in the head box. With this speed adjusting device, it is possible to prevent the upper shielding material from opening abruptly (the sudden drop of the intermediate rail). That is, there is an advantageous effect that the above-mentioned problem that is felt dazzling for the user can be alleviated.

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

Preferably, the lowering speed of the intermediate rail is configured to be smaller than the lowering speed of the bottom rail.
Preferably, the upper shielding material is a race, and the lower shielding material is a drape.
Preferably, first and second stoppers are further provided in the head box, and the first stopper can select holding or releasing of the dimming code by changing a drawing amount of the dimming code. And the second stopper is configured to be able to select the holding or releasing of the lifting / lowering cord by changing the pull-out amount of the lifting / lowering cord, and the lifting / lowering cord is in a state where the first stopper is released. Even when the amount of withdrawal is changed, the dimming amount gradually changes at a substantially constant pace by the braking force of the first speed adjusting device.
Preferably, the first speed adjustment device includes a motion converting unit and a resistance applying unit, and the motion converting unit converts one-way movement of the dimming cord into a motion of a rotating member included in the resistance applying unit. The rotating member is configured to generate a braking force.
Preferably, the resistance applying unit is a centrifugal governor, and the centrifugal governor rotates the predetermined member and moves to the outer diameter side by centrifugal force to contact another member to generate a braking force.
Preferably, a second speed adjusting device is provided in the head box, and the second speed adjusting device is configured to apply a braking force only to the lifting / lowering cord with one-way movement of the lifting / lowering cord. Is done.
Preferably, a friction mechanism is provided in the head box, and the friction mechanism is brought into contact with only the lifting / lowering cord to generate friction.
Preferably, the friction mechanism uses a movable member, and when the lifting / lowering cord moves in one direction, the movable member moves, whereby at least the movable member contacts the lifting / lowering cord to generate friction.
Preferably, the movable member is a rotationally moving member that has a concave and convex portion at a front end and the concave and convex portion rotates around the rear end, and the concave and convex portion rotates and moves when the elevating cord moves in one direction. Then, it comes into contact with the lifting cord and generates friction.
Preferably, the movable member uses a slide member that is slidable along a guide groove, and when the elevating cord moves in one direction, the slide member slides, thereby being positioned in the vicinity of the slide member. The opposing member pinches the elevating cord and generates friction.
Preferably, the slide member is a moving pulley, and the opposing member is a guide pulley.
Preferably, the dimming cord is composed of a plurality of pieces and these are suspended in parallel, and the first speed adjusting device moves in one direction of the dimming cords suspended at both ends of the plurality of dimming cords Brake.
Preferably, the plurality of dimming cords are hung on the back side of the shielding material, whereby the plurality of dimming cords are not visually recognized in a front view.

The front view of the pleat screen which concerns on 1st and 2nd embodiment. The side view (partial excerpt) of the pleat screen which concerns on 1st and 2nd embodiment. FIG. 3 is a plan view of the inside of the head box according to the first embodiment. The top view inside the head box (light control side) which concerns on 1st and 2nd embodiment. FIG. 3 is a plan view of the inside (operation side) of the head box according to the first embodiment. The top view inside a head box concerning a modification. FIG. 7A is a diagram illustrating the stopper in the state of FIG. 7B, and FIG. 7B is a front view illustrating the opening / closing operation of the pleated screen according to the first to third embodiments. FIG. 8A is a diagram illustrating the stopper in the state of FIG. 8B, and FIG. 8B is a front view illustrating the opening / closing operation of the pleated screen according to the first to third embodiments. FIG. 9A is a diagram illustrating the stopper in the state of FIG. 9B, and FIG. 9B is a front view illustrating the opening / closing operation of the pleated screen according to the first to third embodiments. FIG. 10A is an exploded perspective view of the braking device according to the first and second embodiments (FIG. 10A is a view seen from the front upper side, and FIG. 10B is a view seen from the rear lower side). The front perspective view of the braking device concerning a 1st and 2nd embodiment (Drawing 11A is the mode which attached the attachment, and Drawing 11B is the mode which removed the attachment). The rear perspective view of the brake device which concerns on 1st and 2nd embodiment (FIG. 12A is the aspect which attached the attachment, FIG. 12B is the aspect which removed the attachment). FIG. 13A is a plan view of the braking device according to the first and second embodiments (FIG. 13A is an aspect with an attachment, and FIG. 13B is an aspect with the attachment removed). The bottom view of the brake device which concerns on 1st and 2nd embodiment (FIG. 14A is the aspect which attached the attachment, FIG. 14B is the aspect which removed the attachment). FIG. 15A shows a state where no tension is applied to the second lifting / lowering cord (steady state), and FIG. 15B shows a second state where the braking device according to the first and second embodiments brakes the second lifting / lowering cord. FIG. 15C summarizes the rotation direction of each member in the state change when the lifting / lowering cord is clamped (clamped state). FIG. 13B is a cross-sectional view taken along the line QQ in FIG. 13B. The perspective view of the attachment which concerns on 1st and 2nd embodiment. FIG. 12A is a front view of an attachment according to the first and second embodiments, and FIG. 12B is a rear view of the attachment according to the first and second embodiments. Sectional drawing (side view) which shows the aspect which concerns on 1st and 2nd embodiment and has arrange | positioned the attachment and the braking device to the head box. Sectional drawing (front view) which concerns on 1st and 2nd embodiment and shows the aspect which has arrange | positioned the attachment and the braking device to the head box. Sectional drawing which concerns on 1st and 2nd embodiment and shows the aspect which diverted two 2nd raising / lowering cords. The figure which concerns on 1st and 2nd embodiment and shows the difference of the magnitude | size of the turning pulley provided in the front side of an attachment, and the turning pulley provided in a back side (FIG. 23A is a front view, FIG. 23B is a rear view). The top view inside a head box concerning a 2nd embodiment. The top view inside the head box (operation side) concerning a 2nd embodiment. The top view inside the head box (operation side) concerning a 3rd embodiment. Sectional drawing which shows the friction mechanism which concerns on 3rd Embodiment and applied the heart cam. Sectional drawing which shows the friction mechanism which concerns on 3rd Embodiment and applied the heart cam. The top view inside the head box (operation side) concerning a 4th embodiment. Sectional drawing which shows the friction mechanism which concerns on 4th Embodiment and applied the moving pulley. Sectional drawing which shows the friction mechanism which concerns on 4th Embodiment and applied the moving pulley.

  Hereinafter, a preferred embodiment of a shielding device according to the present invention will be described in detail with reference to the drawings.

1. First Embodiment Section 1 describes in detail a shielding device (pleated screen 100) according to a first embodiment of the present invention.

1.1 Shielding device 1.1.2 Overall configuration Fig. 1 is a front view of a pleated screen 100 according to the first embodiment. FIG. 2 is a side view (partially extracted) of the pleated screen 100 according to the first embodiment. 3 to 5 are plan views of the inside of the head box 101 according to the first embodiment, and FIG. 6 is a plan view illustrating a modification thereof.

  As shown in FIG. 1, the pleated screen 100 is suspended and supported by an upper screen 102 a (an example of an “upper shielding material” in the claims) that can be bent in a zigzag shape in the vertical direction from the head box 101. An intermediate rail 103a is attached to the lower end of the upper screen 102a. Further, a lower screen 102b (an example of a “lower shielding material” in the claims) that can be bent in a zigzag shape in the vertical direction from the intermediate rail 103a is suspended and supported, and a bottom rail 103b is formed at the lower end of the lower screen 102b. It is attached. Each of the upper and lower screens 102a and 102b is formed by bending one piece of cloth in a zigzag shape.

  The pleat pieces 102p constituting the upper and lower screens 102a and 102b are configured to have a fold 102c. An insertion hole is provided in the fold line 102c of the upper screen 102a, and the first and second elevating cords CDa and CDb are inserted therethrough. The intermediate rail 103a is attached to the lower end of the first lifting / lowering cord CDa (an example of the “dimming cord” in the claims), so that the intermediate rail 103a is suspended and supported. Further, an insertion hole 102h is also provided in the fold line 102c of the lower screen 102b, and the second elevating cord CDb is inserted therethrough. A bottom rail 103b is attached to the lower end of the second elevating cord CDb, so that the bottom rail 103b is supported by being suspended.

  In the first embodiment, as shown in FIG. 3, each of the first elevating cord CDa and the second elevating cord CDb is composed of five pieces, but this is only an example and the present invention is not limited to this. For example, as shown in FIG. 6, both the first lifting / lowering cord CDa and the second lifting / lowering cord CDb may be provided. With such a configuration, the head box 101 can be downsized, that is, the pleated screen 100 itself can be downsized. Please refer to section 1.3 for details of the case of 5 each.

  The first lifting / lowering cord CDa is introduced into the head box 101 from the cord other end outlets 81 to 85, and is guided to the dimming side in FIGS. And it hangs down from cord one end exit 86a, and is located near the operator's hand so that it can be operated as light control cord 104a. The operator can move up and down the upper screen 102a together with the intermediate rail 103a by operating the light control cord 104a located on the left side (light control side) when viewed from the front. Here, the pleated screen 100 can be dimmed by using different fabrics for the upper screen 102a and the lower screen 102b (for example, the upper screen 102a is a lace fabric and the lower screen 102b is a drape fabric).

  On the other hand, the second raising / lowering cord CDb suspended is similarly conducted into the head box 101 from the cord other end outlets 81 to 85, and is guided to the rear side in FIGS. And it hangs down from cord one end exit 86b, and is located in the vicinity of an operator's hand as operation cord 104b so that operation is possible. The operator can move up and down the lower screen 102b together with the bottom rail 103b by operating the operation code 104b located on the right side (operation side) when viewed from the front.

  Note that, as shown in FIG. 1, the first elevating cord CDa is hung on the back side of the upper and lower screens 102 a and 102 b and is not visible in the front view.

  In particular, as shown in FIG. 4, the braking device 1000 provided on the dimming side of the head box 101 applies an appropriate braking force to the first lifting / lowering cord CDa when the intermediate rail 103a is lowered, so that an appropriate lowering speed is achieved. The intermediate rail 103a can be lowered while holding. That is, the dimming amount gradually changes at a substantially constant pace by such a braking force, thereby preventing a sudden change in the dimming amount. Here, by adopting the attachment 200 described later, it is possible to apply an appropriate braking force only to the intermediate rail 103a by inserting only a part (for example, three) of the first lifting / lowering cords CDa out of the five. It has become. This will be described in detail later. On the other hand, as shown in FIG. 4, the braking device 1000 is not provided on the operation side inside the head box 101.

  A pitch holding cord 106 is suspended from the head box 101 on the back side of the upper and lower screens 102a and 102b. The pitch holding cord 106 has an upper end attached to the head box 101 and a lower end attached to the bottom rail 103b. The pitch holding cord 106 is set to a length that is substantially tensioned when the bottom rail 103b is lowered to the lower limit.

  The pitch holding cord 106 is provided with a large number of annular holding portions at equal intervals, and the first and second lifting / lowering cords CDa and CDb are inserted therethrough. That is, the holding portion is configured to surround the side peripheries of the first and second lifting / lowering cords CDa and CDb. With such a configuration, as shown in FIG. 1, when the bottom rail 103b is lowered to the lower limit, the leading end of each holding portion engages with the first and second lifting / lowering cords CDa and CDb, and each holding portion Thus, the folds are supported from below, and the folds of the upper and lower screens 102a and 102b are independently held at equal intervals.

1.1.2 Operation Flow Next, the operation flow of the pleat screen 100 will be described in detail. 7-9 is a front view which shows the opening / closing operation | movement of the pleats screen 100 which concerns on 1st Embodiment.

  When the operator pulls down the dimming cord 104a from the state shown in FIG. 1, that is, the bottom rail 103b is lowered to the lower limit and the intermediate rail 103a is in the vicinity of the middle between the head box 101 and the bottom rail 103b, Are connected to the head box 101, and the intermediate rail 103a is raised. Then, as the intermediate rail 103a rises, the upper screen 102a is sequentially folded from below, and the lower screen 102b is stretched upward. When the intermediate rail 103a is raised to the highest position, the pleated screen 100 is in the state shown in FIG. When the operation of the dimming cord 104a is stopped, the stopper 77a locks the movement of the first lifting / lowering cord CDa, so that the intermediate rail 103a can be operated to a desired position. It should also be noted that the stopper 77a is configured to be able to maintain a locked state (an example of the “holding state” in the present invention) or a state in which the stopper 77a is released depending on the amount by which the light control cord 104a is pulled out.

  Next, when the operation cord 104b is pulled down while the intermediate rail 103a is lifted as shown in FIG. 7, the five second lifting cords CDb connected thereto are pulled into the head box 101, and the bottom rail 103b is lifted. As the bottom rail 103b is raised, the lower screen 102b is sequentially folded from below. When the bottom rail 103b is raised to the highest position, the pleated screen 100 is in the state shown in FIG. When the operation of the operation code 104b is stopped, the stopper 77b locks the movement of the second lifting / lowering code CDb, so that the bottom rail 103b can be operated to a desired position.

  Next, when the operation cord 104b is slightly pulled down from the state where both the intermediate rail 103a and the bottom rail 103b are at the highest position as shown in FIG. 8, the stopper 77b is unlocked and the second elevating cord CDb is movable. It becomes a state. And the bottom rail 103b can be lowered | hung by the operator operating the operation code 104b in this state. When the bottom rail 103b is lowered to the lowest position, the pleated screen 100 is again in the state of FIG.

  Finally, when the dimming cord 104a is slightly pulled down from the state shown in FIG. 8, the stopper 77a is unlocked, and the first elevating cord CDa becomes movable. In this state, the intermediate rail 103a can be lowered by operating the dimming cord 104a. When the intermediate rail 103a is lowered to the lowest position, the shielding device is in the state shown in FIG.

  By the way, if the dimming cord 104a is released during the operation of lowering the intermediate rail 103a, there is a possibility that the intermediate rail 103a may fall down vigorously due to its own weight. However, the pleated screen 100 according to the first embodiment includes a braking device 1000 described later, and the movement of the first lifting cord CDa forward (that is, the direction in which the intermediate rail 103a descends) is braked. Even if the dimming cord 104a is released, the intermediate rail 103a (and the upper screen 102a) can be slowly lowered. When the intermediate rail 103a falls freely due to its own weight, the moving speed of the first lifting / lowering cord CDa becomes substantially constant where the tension applied to the first lifting / lowering cord CDa and the braking force by the braking device 1000 are balanced. In other words, even when the drawing amount of the dimming cord 104a is changed with the stopper 77a being released, the dimming amount gradually changes at a substantially constant pace by the braking force of the braking device 1000.

1.2. Braking Device 1.2.1 Outline of Parts The braking device 1000 will be described with reference to FIGS. The braking device 1000 is a braking device that brakes the movement of the cord. Specifically, in the braking device 1000, the mechanism relating to the motion conversion unit and the mechanism relating to the resistance applying unit are provided so as to be positioned substantially vertically. Here, as shown in FIG. 10, the slider 220, the coil spring SP, the idle roller 40 including the shaft core 41 and the roller portion 42, the knurled 240, the pinion gear 50, the shaft core 31, the washer 241, the internal toothed carrier 260, and The planetary gear 280 forms a motion conversion unit, and the weight 340, the weight holder 320 with sun gear, and the case 10A form a resistance applying unit.

  FIG. 10A is an exploded perspective view seen from the front upper side of the braking device 1000, and FIG. 10B is an exploded perspective view seen from the rear upper side. The braking device 1000 includes an attachment 200, a case 10A, a slider 220, a coil spring SP, an idle roller 40 including a shaft core 41 and a roller portion 42, a knurling 240, a pinion gear 50, a shaft core 31 through which the knurling 240 and the pinion gear 50 are inserted, and a washer. 241, a carrier 260 with an internal tooth, a planetary gear 280, a weight holder 320 with a sun gear, a weight 340, and a base 70. The attachment 200 will be described again in section 1.2.5 below.

  In the first embodiment, the idle roller 40 and the knurling 240 function as a sandwiching body that sandwiches the cord. Further, the idle roller 40 functions as a support, and the knurl 240 functions as a roller that rotates by movement of the cord in the longitudinal direction. The slider 220 holds the idle roller 40 and the knurl 240.

  As shown in FIG. 10, four planetary gears 280 are provided in the internal toothed carrier 260, and eight weights 340 are held in the weight holder 320 with the sun gear.

1.2.2 Assembly Configuration Next, a state in which these members are assembled will be described with reference to FIGS. FIG. 11A is a front perspective view of the braking device 1000 and shows an aspect with the attachment 200 attached, and FIG. 11B shows an aspect with the attachment 200 removed. FIG. 12A is a rear perspective view of the braking device 1000 and shows an aspect with the attachment 200 attached, and FIG. 12B shows an aspect with the attachment 200 removed.

  As shown in FIGS. 11A and 11B, three first elevating cords CDa out of the five first elevating cords CDa are inserted through the braking device 1000. More specifically, it is shown that the first elevating cord CDa is led out from the slider 220 to both ends in the appearance of the braking device 1000. In particular, in this specification, the outlet of the first lifting / lowering cord CDa provided on the rear side of the braking device 1000 is one end 221 (see FIG. 12B), and the first lifting / lowering cord CDa provided on the front side of the braking device 1000 is provided. The outlet port is referred to as the other end port 222 (see FIG. 11B).

  FIG. 13A is a plan view of the braking device 1000 with the attachment 200 attached, and FIG. 13B shows the aspect with the attachment 200 removed. FIG. 14A is a bottom view of the braking device 1000 with the attachment 200 attached thereto, and FIG. 14B is a view showing the aspect with the attachment 200 removed. Here, as shown in FIG. 13B, the upper end of the shaft 31 is inserted through the first ceiling wall groove 16 provided in the case 10A and exposed to the outside of the case 10A. Similarly, the upper end of the shaft core 41 passes through the second ceiling wall groove 17 provided in the case 10A and is exposed to the outside of the case 10A.

  Then, the first guide wall 16A provided at the edge of the first top wall groove 16 abuts the shaft core 31, and the second guide wall 17A provided at the edge of the second top wall groove 17 contacts the shaft core 41. It touches.

  As shown in FIG. 14, the base 70 has a lower end of the shaft core 31 inserted through the first base groove 706 and a lower end of the shaft core 41 inserted through the second base groove 707 in the bottom view. It can be visually recognized.

1.2.3 Internal Configuration A relative position between each member in the assembled state will be described in more detail with reference to FIGS. As shown in FIG. 15, the pinion gear 50 centering on the shaft core 31 and the internal gear 261 provided on the internal toothed carrier 260 mesh with each other. Further, the rotation of the internal gear 261 is configured to be transmitted to the planetary gear 280 via a support shaft (not shown) of the internal toothed carrier 260. The planetary gear 280 meshes with the sun gear 323 provided in the weight holder 320 with sun gear and the inner peripheral gear 115 provided inside the case 10A. Therefore, when rotation is applied to the pinion gear 50, the planetary gear 280 can revolve in the space formed between the sun gear 323 and the inner peripheral gear 115 around the center of the inner gear 261. .

  16 is a cross-sectional view taken along line QQ in FIG. 13B. As shown in FIG. 16, the shaft core 31 and the shaft core 41 protrude from the upper end of the case 10 </ b> A and the lower end of the base 70. Here, the upper ends of the first guide wall 16A and the second guide wall 17A are substantially the same height as the upper ends of the shaft core 31 and the shaft core 41, respectively.

  The knurling 240 and the roller portion 42 are located inside the slider 220. Further, the pinion gear 50 is positioned outside the slider 220 with the slider 220 sandwiched in cooperation with the knurl 240. Further, the pinion gear 50 and the internal gear 261 are engaged with each other.

  And it is covered with the attachment 200 from the upper side of the case 10 </ b> A to the flange 13. The case 10A is engaged with the base 70 at the lower end thereof. A weight 340 is held on the upper portion of the base 70.

1.2.4 Operation Next, the operation of the braking apparatus 1000 will be described with reference to FIG. 15 again. 15A shows a state in which no tension is applied to the first lifting / lowering cord CDa (steady state), FIG. 15B shows a tension applied to the first lifting / lowering cord CDa, and the first lifting / lowering cord CDa is sandwiched between the knurling 240 and the roller portion 42. FIG. 15C summarizes the rotation direction of each member when the state changes from FIG. 15A to FIG. 15B. Here, for convenience of explanation, the outer periphery of the roller portion 42 that does not appear in the cross-sectional view is displayed around the shaft core 41, and the outer periphery of the knurl 240 is displayed so as to overlap the periphery of the shaft core 31. The outer periphery of the knurl 240 is not strictly a circle, but is illustrated as being approximate to a circle for simplicity of explanation.

  As shown in FIG. 15A, in the steady state, the coil spring SP contacts the inner wall behind the case 10A and presses the slider 220 forward. Therefore, the slider 220 is positioned in front of the case 10A. Therefore, the shaft core 31 whose position is regulated by the first top wall groove and the first bottom wall groove of the slider 220 and the shaft core 41 whose position is regulated by the second top wall groove and the second bottom wall groove. Moves forward together with the slider 220. Furthermore, the distance between the first ceiling wall groove 16 and the second ceiling wall groove 17 provided in the case 10 </ b> A held on the upper portion of the slider 220 decreases toward the front. Similarly, the distance between the first base groove 706 and the second base groove 707 provided in the base 70 decreases toward the front. Accordingly, the distance between the roller portion 42 rotatably supported on the shaft core 41 and the knurled 240 rotatably supported on the shaft core 31 is also reduced. That is, the first ceiling wall groove 16 and the first base groove 706 function as a restriction groove that restricts the shaft 31 of the knurled 240 from being movably fitted and the knurled 240 not moving along the groove. Similarly, the 2nd ceiling wall groove | channel 17 and the 2nd base groove | channel 707 are the groove | channels which the shaft core 41 of the roller part 42 fits so that a movement is possible, and it is as a control groove which controls that the roller part 42 does not move along a groove | channel. Function. Further, since the first ceiling wall groove 16 and the first base groove 706 are formed concentrically with the center point of the inner peripheral surface of the inner toothed carrier 260 in plan view, the shaft core 31 moves in each groove. Even so, the pinion gear 50 can continue to mesh with the internal gear 261 provided on the internal toothed carrier 260.

  As described above, when the distance between the knurl 240 and the roller portion 42 is reduced, the knurl 240 is pressed by the roller portion 42, and the first elevating cord CDa is held between the knurl 240 and the roller portion 42. That is, the coil spring SP also functions as a biasing member that constantly biases the knurled 240 so that the knurled 240 is pressed against the roller portion 42.

  Then, in the braking device 1000 in the steady state, it is assumed that tension is applied to the first lifting / lowering cord CDa in the direction of the arrow D1 (forward). Then, the knurling 240 rotates counterclockwise and the roller portion 42 rotates clockwise due to the frictional force generated between the first elevating cord CDa. As the knurled 240 rotates, the pinion gear 50 that is fixed by sharing the same axis 31 also rotates (rotates) in the same direction (counterclockwise) as the knurled 240. At this time, as shown in FIG. 15B, the shaft core 31 and the shaft core 41 move forward in a plan view, close to each other in the left-right direction, and sandwich the first lifting code CDa by the knurling 240 and the roller portion 42. The wearing force is increased, and the knurl 240 is reliably rotated in accordance with the movement of the first elevating cord CDa. Then, since the pinion gear 50 meshes with the internal gear 261, the internal gear 261 rotates (rotates) counterclockwise by the force applied from the teeth of the pinion gear 50. As a result, the internal gear 261 and the internal toothed carrier 260 also rotate (revolve) counterclockwise, and the planetary gear 280 provided on the internal toothed carrier 260 likewise rotates (revolves) counterclockwise. Here, since the planetary gear 280 meshes with the sun gear 323 and the inner peripheral gear 115 fixed by the case 10A, the planetary gear 280 rotates counterclockwise while rotating in the opposite direction (clockwise) to the revolution direction. Will be. Therefore, the sun gear 323 that meshes with the planetary gear 280 inside the planetary gear 280 rotates (rotates) in the opposite direction (counterclockwise) to the rotation of the planetary gear 280. At this time, the rotation of the sun gear 323 is accelerated by the planetary gear 280. Thereby, the weight 340 held by the weight holder 320 with the sun gear rotating together with the sun gear 323 also starts to rotate. As already described, the inner peripheral gear 115 that meshes with the planetary gear 280 outside the planetary gear 280 does not rotate even when the planetary gear 280 rotates because the case 10A and the base 70 are fixed.

  As shown in FIG. 15B, when the knurl 240 and the roller portion 42 approach the limit (clamped state), the knurl 240 continues to rotate, but the movement along the internal gear 261 of the knurl 240 stops. At this time, the rotation of the other members due to the rotation of the knurl 240 is continued. Then, the weight 340 comes into contact with the inner peripheral wall of the case 10 </ b> A due to the centrifugal force, and a resistance force is generated against the rotation. That is, when the moving speed of the first lifting / lowering cord CDa is increased, the rotational speed is increased, thereby increasing the centrifugal force. When the centrifugal force increases, the weight 340 comes into stronger contact with the inner peripheral wall of the case 10A, and the resistance force increases. Thereby, the moving speed of the first lifting / lowering cord CDa (the falling speed of the intermediate rail 103a shown in FIG. 1) can be suppressed. Here, when the tension applied to the first lifting / lowering cord CDa is substantially constant (for example, the intermediate rail 103a (see FIG. 1 and the like) suspended so as to be lifted and lowered by the first lifting / lowering cord CDa on the front side of the braking device 1000). In the case of lowering freely), the moving speed of the first lifting / lowering cord CDa becomes substantially constant where the tension applied to the first lifting / lowering cord CDa and the resistance force by the weight 340 and the inner peripheral wall of the case 10A balance. Therefore, the braking device 1000 functions as a rotary damper for the movement of the first lifting / lowering cord CDa, and can slowly lower the intermediate rail 103a (see FIG. 1 and the like) (that is, a centrifugal governor).

  FIG. 15C summarizes the rotation direction of each member (including the front-rear direction and the tightening direction in a plan view) for the state change from the steady state to the clamped state described above.

  On the other hand, when tension is applied to the first lifting / lowering cord CDa in the direction opposite to the arrow D1 (rearward), the knurl 240 and the roller portion 42 rotate in the direction opposite to the above. As a result, the shaft core 31 and the shaft core 41 move along the first top wall groove 16 and the second top wall groove 17 so as to be separated from each other. Then, the clamping force of the knurl 240 with respect to the first lifting / lowering cord CDa is weakened, and the first lifting / lowering cord CDa can be pulled with a weak force. Therefore, when the braking device 1000 is provided in the head box, the direction in which the tension is applied to the first elevating cord CDa forward in FIG. 9 is the direction in which the intermediate rail 103a (see FIG. 1 etc.) descends, and the first rearward is the first. The direction in which tension is applied to the lifting / lowering cord CDa is preferably the direction in which the intermediate rail 103a (see FIG. 1 and the like) rises.

  As described above, in the braking device 1000 according to the first embodiment, when the first lifting / lowering cord CDa and the sandwiching body relatively move in one direction, the sandwiching body sandwiches the first lifting / lowering cord CDa and the other direction. It can be said that the clamp state is changed so that the first elevating cord CDa is released in the non-bent state when moving relative to each other. Here, the release of the first lifting / lowering cord CDa refers to a state in which the movement of the first lifting / lowering cord CDa is allowed, regardless of whether the first lifting / lowering cord CDa and the sandwiched body are in contact or non-contact.

1.2.5 Attachment Subsequently, an attachment 200 configured to be attachable to the braking device 1000 will be described with reference to FIGS. 17 to 22. Note that the brake device 1000 itself may include the features related to the attachment 200. That is, the attachment 200 and the braking device 1000 may be integrated instead of separate.

  FIG. 17 is a perspective view of the attachment 200. 18A is a front view of the attachment 200, and FIG. 18B is a rear view of the attachment 200. FIG. 19 and 20 are cross-sectional views showing an aspect in which the attachment 200 and the braking device 1000 are disposed in the head box 101. FIG. And FIG. 21 is a figure which shows the difference of the magnitude | size of the turning pulley provided in the front side of an attachment, and the turning pulley provided in a back side.

  As shown in FIG. 17 and the like, the attachment 200 has a substantially rectangular parallelepiped shape as a whole, and the braking device 1000 is accommodated in an internal space 200 s inside thereof. The attachment 200 is substantially bilaterally symmetric both in appearance and interior. Further, the attachment 200 is configured to be surrounded by a canopy 3t, a bottom 3b, a left side wall 41, a right side wall 4r, a front surface 5f, and a back surface 5r.

  The canopy 3t is provided with pulley arrangement holes 2ta to 2tg. Referring to FIG. 17, pulley arrangement holes 2ta to 2tf are shown on the front side, and pulley arrangement holes 2tg and 2th are shown on the rear side. Further, the canopy portion 3t is provided with locking portions 8fl, 8fr, 8rl, 8rr, whereby the attachment 200 is locked when the canopy portion 3t is arranged on the head box in the pleated screen 100.

  More specifically, as shown in FIG. 19, the head box 101 is provided with projections 101al and 101ar. The protrusion 200al is provided so as to restrict the movement of the above-described locking portions 8fl and 8rl in the attachment 200, whereby the attachment 200 is locked. Similarly, the protrusion 200ar is provided so as to restrict the movement of the above-described locking portions 8fr and 8rr in the attachment 200, whereby the attachment 200 is locked. Thus, since it is supported by the head box via the four locking portions 8fl, 8fr, 8rl, 8rr, the braking device 1000 is not overloaded.

  As shown in FIG. 17, the bottom 3b is composed of bottoms 3bf, 3bc, and 3br in order from the front to the rear. The bottom portions 3bf and 3br are surfaces that come into contact with the head box 101 when the bottom portions 3bf and 3br are arranged on the head box 101 in the pleated screen 100. A step is provided between the bottom 3bc and the bottom 3bf, 3br, and the bottom 3bc is positioned higher than the bottom 3bf, 3br. The bottom portion 3bf is provided with six pulley arrangement holes (not shown) positioned so as to face the pulley arrangement holes 2ta to 2tf, and the bottom portion 3bc has two pulley positions located opposite to the pulley arrangement holes 2tg and 2th. Pulley arrangement holes (not shown) are respectively provided.

  By passing the pulley shaft through the pair of upper and lower pulley arrangement holes, the turning pulley is provided in the internal space 200 s of the attachment 200. For example, the aspect which has arrange | positioned turning pulley 90a, 90d, 90f, 90g, 90h is shown by FIG. The first elevating cord CDa is turned in the other direction by passing through these turning pulleys. That is, the turning pulley functions as a turning member of the first lifting / lowering cord CDa, and is not limited to the pulley as long as it is a member that turns the extending direction of the first lifting / lowering cord CDa.

  As shown in FIGS. 22A and 22B, the distance between the opposed pulley arrangement holes provided in the front and the distance between the opposed pulley arrangement holes provided in the rear are different. It is noted that the height h1 of the pulleys (eg, turning pulleys 90a, 90d, 90f in FIG. 23A) is greater than the height h2 of the turning pulleys provided behind (eg, turning pulleys 90g, 90h in FIG. 23B). I want. When the attachment 200 is desired to be miniaturized, it is assumed that the height h1 of the turning pulley provided at the front is made smaller as the height h2 of the turning pulley provided at the rear. However, as shown in FIG. 23B, since the turning pulley provided at the rear is short, the first raising / lowering cord CDa located at the lowermost side among the three passing through the braking device 1000 is located below the turning pulley. Will be located. For this reason, about the front, it is comprised so that the three 1st raising / lowering cords CDa may contact a turning pulley as h1> h2.

  The bottom 3b is provided with an attachment cylinder 8b used when the attachment 200 is disposed in the head box 101. For example, it is possible to stably dispose the attachment 200 in the head box 101 by fitting the attachment cylinder 8b into a member such as a shaft provided in the head box 101. That is, as shown in FIG. 20, both the braking device 1000 and the attachment 200 are locked by the attachment cylinders 702 and 8 b passing through the head box 101.

  As shown in FIG. 21, the left side wall 4l and the right side wall 4r face the left inner wall 4il and the right inner wall 4ir located inside the attachment 200, respectively. A space between the left side wall portion 4l and the left inner wall 4il is a left cord bypass route 7l. A space sandwiched between the right wall 4r and the right inner wall 4ir is a right cord bypass 7r. By using the left cord detour 7l and the right cord detour 7r (also referred to as cord detours 7l and 7r), at least one of the plurality of first elevating cords CDa is detoured without being inserted into the braking device 1000. Can do. That is, by extending the non-inserted first lifting / lowering cord CDa along the cord bypass circuits 7l and 7r (that is, bypassing the braking device 1000), the braking force applied to the first lifting / lowering cord CDa is appropriately adjusted. can do. For example, FIG. 18 shows a mode in which the two first lifting / lowering cords CDa are inserted into the code bypass circuits 7l and 7r (that is, bypassed). It should be noted that the cord detours 7l and 7r are provided on both sides of the roller portion 42 and the knurling 240 (cord capturing portion) in the braking device 1000.

  Further, as shown in FIG. 11, the left inner wall 4il and the right inner wall 4ir are provided with claw portions 8al and 8ar, respectively. The brake device 1000 is used when the brake device 1000 is installed and integrated in the internal space 200s. At the time of installation, the claw portions 8al and 8ar are engaged with engagement holes (not shown) of the case 10A. Accordingly, the case 10A enters while the left inner wall 4il and the right inner wall 4ir elastically deform outward, and the claw portions 8al and 8ar provided in the attachment 200 and the two engagement holes provided on the left and right of the case 10A are provided. It is possible to engage elastically (so-called snap-fit mechanism).

  As shown in FIG. 18A, the front surface portion 5f is configured in a hollow rectangular shape in plan view. As shown in FIG. 18B, the back surface part 5r is configured in a hollow rectangular shape in plan view. Moreover, the partition part 5ra is provided so that it may cross | intersect right and left in the approximate center, and the partition part 5rb is provided in the U-shape above it. The partitions 5ra and 5rb divide the opening (cord entrance) of the back surface part 5b from the openings 6a, 6b, and 6c, respectively, and the three first elevating cords CDa pass through each of these to the braking device 1000. Will head. When there are three or more first lifting / lowering cords CDa, the three first lifting / lowering cords CDa are vertically aligned by the attachment 200 regardless of whether or not a part of the first lifting / lowering cord CDa is bypassed. Thus, it is introduced into the braking device 1000.

1.3 Arrangement in the Head Box Here, the arrangement when the braking device 1000 (including the attachment 200) is installed in the head box 101 will be described again with reference to FIGS.

  As shown in FIG. 3, the head box 101 has a gear box 76b, a stopper 77b, and a braking device 1000 (including the attachment 200) from the operation side (right) to the dimming side (left) along the longitudinal direction. The first support member 71, the second support member 72, the third support member 73, the fourth support member 74, the fifth support member 75, the stopper 77a, and the gear box 76a are disposed. Further, five first elevating cords CDa1 to CDa5 and five second elevating cords CDb1 to CDb5 extend in the head box 101.

  The 1st-5th support members 71-75 are arrange | positioned corresponding to five 1st raising / lowering cords CDa1-CDa5 and 2nd raising / lowering cord CDb1-CDb5. Further, at the positions corresponding to the support members of the head box 101, the other ends (the end portions on the side supporting the intermediate rail 103a and the bottom rail 103b) of the first elevating cord CDa and the second elevating cord CDb are connected to the head box 101. Cord other end outlets 81 to 85 for being led out from are provided.

  Further, the attachment 200 includes a turning pulley 90a having a shaft inserted through the pulley arrangement hole 2ta and the pulley arrangement hole facing the pulley arrangement hole 2ta on the operation side (front of the attachment 200), and the pulley arrangement hole 2td and the pulley opposed thereto. A turning pulley 90c having a shaft inserted through the arrangement hole, and a turning pulley 90f having a shaft inserted through the pulley arrangement hole 2tf and the pulley arrangement hole opposite thereto are arranged. Further, on the light control side (rear of the attachment 200), a turning pulley 90g having a shaft inserted into the pulley arrangement hole 2tg and the pulley arrangement hole facing the pulley arrangement hole 2tg, and a shaft at the pulley arrangement hole 2th and the pulley arrangement hole opposed thereto are provided. A turning pulley 90h inserted therethrough is disposed.

  One end of each of the first lifting / lowering cords CDa1, CDa3, CDa5 introduced into the head box 101 from the cord other end outlets 81, 83, 85 is passed through the braking device 1000 (from “the other end port 222” to “the one end port 221”). Guided by the light control side stopper 77a. Specifically, the first elevating cord CDa1 passes through the second support member 72, the third support member 73, the fourth support member 74, and the fifth support member 75, and then is guided to the stopper 77a through the braking device 1000. The After passing through the fourth support member 74 and the fifth support member 75, the first elevating cord CDa3 is guided to the stopper 77a through the braking device 1000. The first lifting / lowering cord CDa5 is guided to the stopper 77a through the braking device 1000 after its extending direction is slightly turned by the turning pulley 90c provided in front of the attachment 200.

  On the other hand, one ends of the first lifting / lowering cords CDa2 and CDa4 introduced into the head box 101 from the cord other end outlets 82 and 84 are connected to the right cord bypass route 7r and the left cord bypass route 7l in the attachment 200 without passing through the braking device 1000, respectively. It is inserted and finally guided to the stopper 77a. Specifically, the first raising / lowering cord CDa2 is slightly turned by the turning pulley 90f provided in front of the attachment 200 and then passes through the right cord detour 7r. The extending direction is further turned by the provided turning pulley 90h, and finally guided to the stopper 77a via the turning pulley 98a provided at the end of the stopper 77a. The second raising / lowering cord CDa4 is turned by a turning pulley 90a provided in front of the attachment 200, and after passing through the left cord detour 7l after its extending direction is slightly turned, the turning pulley provided at the rear of the attachment 200 is provided. The extending direction is further turned by 90 g and finally guided to the stopper 77 a via a turning pulley 97 a provided at the end of the stopper 77 a. More specifically, the first elevating cords CDa1, CDa3, and CDa5 inserted through the braking device 1000 and the second elevating cords CDa2 and CDa4 that are not inserted through the braking device 1000 are all rectified before the stopper 77a. To the stopper 77a.

  After that, the first elevating cords CDa1 to CDa5 are hung down as a dimming cord 104a from the operator through the stopper 77a through the gear box 76a and from the cord one end outlet 86a to the outside of the head box 101 (FIG. 1). reference).

  By the way, when the operator pulls the dimming cord 104a to raise the intermediate rail 103a, the first elevating cords CDa1 to CDa5 are directed from the other end port 222 of the braking device 1000 toward the one end port 221 (in other words, from the operation side). Move toward the dimming side. However, the first elevating cords CDa2 and CDa4 are not inserted through the braking device 1000. At this time, the turning pulley 90a rotates counterclockwise as the first lifting / lowering cord CDa4 moves. The turning pulley 90c rotates clockwise as the first lifting / lowering cords CDa1, CDa3, CDa5 move. The turning pulley 90f rotates counterclockwise as the first lifting / lowering cord CDa2 moves. The turning pulley 90g rotates counterclockwise as the first lifting / lowering cord CDa4 moves. The turning pulley 90h rotates clockwise as the first lifting / lowering cord CDa2 moves. On the other hand, when the operator loosens the dimming cord 104a and lowers the intermediate rail 103a, the first elevating cords CDa1 to CDa5 move from the one end 221 to the other end 222 of the braking device 1000 (in other words, the dimming side To the operation side). At this time, the turning pulley 90a rotates clockwise as the first lifting / lowering cord CDa4 moves. The turning pulley 90c rotates counterclockwise as the first lifting / lowering cords CDa1, CDa3, CDa5 move. The turning pulley 90f rotates counterclockwise as the first lifting / lowering cord CDa2 moves. The turning pulley 90g rotates clockwise as the first lifting / lowering cord CDa4 moves. The turning pulley 90h rotates counterclockwise as the first lifting / lowering cord CDa2 moves. That is, the turning pulleys 90a and 90g rotate in a predetermined direction, and the turning pulleys 90c, 90f and 90h rotate in the direction opposite to the predetermined direction.

  Further, of the five first lifting / lowering cords CDa, the first lifting / lowering cord CDa (here, the first lifting / lowering cords CDa1, CDa3, CDa5) through which the braking device 1000 is inserted and the first lifting / lowering cords 7r, 7l are inserted. Note that the codes CDa (here, the first elevating codes CDa2 and CDa4) are alternately arranged in the longitudinal direction of the head box 101. Thus, by alternately arranging the first lifting / lowering cord CDa that is inserted into the braking device 1000 and the first lifting / lowering cord CDa that is not inserted, a braking force is equally applied to the entire first lifting / lowering cord CDa. Inclination of the box 101 can be suppressed.

  Note that the braking device 1000 brakes one-way movement of the first lifting / lowering cord CDa (here, the first lifting / lowering cords CDa1 and CDa5) hanging from at least both ends of the plurality of first lifting / lowering cords CDa. I want to be.

  On the other hand, one end of each of the second elevating cords CDb1 to CDb5 introduced into the head box 101 from the cord other end outlets 81 to 85 is guided to the operation side stopper 77b. After that, the stopper 77b passes through the gear box 76b, exits from the cord one end outlet 86b to the head box 101, and the second lifting / lowering cords CDb1 to CDb5 are suspended as the operation cord 104b by the operator (see FIG. 1). ).

1.3.1 Modification <Number of cords: 2 each>
The number of the first and second lifting / lowering cords CDa and CDb is not necessarily limited to five. Here, the arrangement according to the modification will be described again with reference to FIG. As shown in FIG. 6, the head box 101 according to the modification includes a gear box 76b, a stopper 77b, and a first support member from the operation side (right) to the dimming side (left) along the longitudinal direction. 71, a braking device 1000 (including the attachment 200), a second support member 72, a stopper 77a, and a gear box 76a are disposed. In addition, two first elevating cords CDa 1 and CDa 2 and two second elevating cords CDb 1 and CDb 2 extend in the head box 101.

  The first and second support members 71 and 72 are disposed corresponding to the two first lifting / lowering cords CDa1 and CDa2 and the two second lifting / lowering cords CDb1 and CDb2. Further, at the position corresponding to each support member of the head box 101, the other end (the end portion on the side supporting the bottom rail) of the first elevating cord CDa and the second elevating cord CDb is led out from the head box 101. Cord other end outlets 81 and 82 are provided.

  The attachment 200 includes a turning pulley 90b having a shaft inserted through the pulley arrangement hole 2tb and the pulley arrangement hole facing the pulley arrangement hole 2tb on the operation side (the front side of the attachment 200), and the pulley arrangement hole 2te and the pulley opposed thereto. A turning pulley 90e having a shaft inserted through the arrangement hole is arranged. Further, on the light control side (rear of the attachment 200), a turning pulley 90h is provided, in which a shaft is inserted into the pulley arrangement hole 2th and the pulley arrangement hole facing the pulley arrangement hole 2th.

  One ends of the first elevating cords CDa1 and CDa2 introduced into the head box 101 from the cord other end outlets 81 and 82 are guided to the stopper 77a via the braking device 1000 (from “the other end port 222” to “the one end port 221”). . In particular, since the other end port 222 of the braking device 1000 faces the direction of the first support member 71, the first lift code CDa2 guided from the second support member 72 is different from the first lift code CDa1 and is different from the attachment 200. After the turning direction is turned by a turning pulley 90b provided in front of the vehicle, it is guided to the stopper 77a through the braking device 1000.

  After that, the stopper 77a passes through the gear box 76a, exits from the cord one end outlet 86a to the head box 101, and the first elevating cords CDa1 and CDa2 are hung down as a dimming cord 104a by the operator (FIG. 1). reference).

  By the way, when the operator pulls the dimming cord 104a (that is, when the intermediate rail 103a is raised), the first elevating cords CDa1 and CDa2 move from the other end port 222 of the braking device 1000 toward the one end port 221. At this time, the turning pulley 90b rotates clockwise as the first lifting / lowering cord CDa2 moves. On the other hand, when the operator loosens the dimming cord 104a and lowers the intermediate rail 103a, the first elevating cords CDa1 and CDa2 move from the one end 221 to the other end 222 of the braking device 1000. At this time, the turning pulley 90b rotates counterclockwise as the first lifting / lowering cord CDa2 moves.

  On the other hand, one ends of the second elevating cords CDb1 and CDb2 introduced into the head box 101 from the cord other end outlets 81 and 82 are all guided to the stopper 77b. Specifically, the second lifting / lowering cord CDb1 once extends to the dimming side in the head box 101 but is turned back through the wall 72w and passes through the left cord detour 7l as it is. Then, it is guided to the stopper 77 b through the first support member 71. Further, the first elevating cord CDa2 is guided to the stopper 77b after its extending direction is slightly turned by the turning pulley 97b provided at the end of the stopper 77b.

  After that, the stopper 77b passes through the gear box 76b, exits from the cord one end outlet 86b to the head box 101, and the second elevating cords CDb1 to CDb2 are suspended as the operation cord 104b by the operator (see FIG. 1). ).

1.4 Effects As described above, in the pleated screen 100 according to the first embodiment (including the modified example), the brake device 1000 is provided in the head box 101 in order to prevent a sudden change in the amount of light accompanying the sudden drop of the intermediate rail 103a. It has been. And the raising / lowering speed of the intermediate rail 103a is adjusted by the 1st raising / lowering code | cord | chord CDa being penetrated by the braking device 1000. FIG. That is, the lowering speed of the intermediate rail 103a is configured to be smaller than the lowering speed of the bottom rail 103b. Thereby, the problem that the user feels dazzling can be solved, and a more human-friendly pleated screen 100 can be realized.

2. Second Embodiment In Section 2, the shielding device (pleated screen 100) according to the second embodiment will be described in detail. In addition, about the part which is common in the pleat screen 100 which concerns on 1st Embodiment, the description shall be abbreviate | omitted.

2.1 Configuration The pleat screen 100 according to the first embodiment described above is configured such that at least a part of the first lifting / lowering cord CDa is inserted into the braking device 1000 so that the lifting / lowering speed of the intermediate rail 103a is adjusted. On the other hand, no special resistance force is given to the second lifting / lowering cord CDb not involved in the intermediate rail 103a. However, the present invention is not limited to such an example, and an appropriate resistance may be applied to the second lifting / lowering cord CDb. Of course, it should be noted that the brake device 1000 that brakes the first elevating cord CDa is an indispensable configuration because the problem to be solved is to prevent the intermediate rail 103a from descending rapidly. Specifically, the pleated screen 100 according to the second embodiment further includes a braking device 1000 through which the second lifting / lowering cord CDb is inserted in addition to the braking device 1000 through which the first lifting / lowering cord CDa is inserted.

  FIG. 23 is a plan view of the inside of the head box 101 according to the second embodiment, and FIG. 24 is an enlarged view (operation side) thereof.

  As shown in FIG. 23, the head box 101 includes a gear box 76b, a stopper 77b, and a second braking device 1000b (attachment 200) from the operation side (right) to the dimming side (left) along the longitudinal direction. The first support member 71, the second support member 72, the third support member 73, the fourth support member 74, the fifth support member 75, the first braking device 1000a (including the attachment 200), the stopper 77a, and the gear box. 76a is arranged. Further, five first elevating cords CDa1 to CDa5 and five second elevating cords CDb1 to CDb5 extend in the head box 101. The braking device 1000 according to the first embodiment corresponds to the first braking device 1000a, and the same one is adopted as the second braking device 1000b.

  The 1st-5th support members 71-75 are arrange | positioned corresponding to five 1st raising / lowering cords CDa1-CDa5 and 2nd raising / lowering cord CDb1-CDb5. Further, at the positions corresponding to the support members of the head box 101, the other ends (the end portions on the side supporting the intermediate rail 103a and the bottom rail 103b) of the first elevating cord CDa and the second elevating cord CDb are connected to the head box 101. Cord other end outlets 81 to 85 for being led out from are provided.

  One end of the second elevating cords CDb1, CDb3, CDb5 introduced into the head box 101 from the cord other end outlets 81, 83, 85 passes through the second braking device 1000 (from the “other end port 222” to the “one end port 221”). It is guided to the stopper 77b on the operation side. Specifically, the second elevating cord CDb1 is stopped by the second braking device 1000 after the extending direction is slightly turned by the turning pulley 90d provided in front of the attachment 200 in the second braking device 1000. 77b. After passing through the second support member 72 and the first support member 71, the second elevating cord CDb3 is guided to the stopper 77b through the second braking device 1000. After passing through the fourth support member 74, the third support member 73, the second support member 72, and the first support member 71, the second lift code CDb5 is guided to the stopper 77b through the second braking device 1000.

  On the other hand, one end of the second lifting / lowering cords CDb2 and CDb4 introduced into the head box 101 from the cord other end outlets 82 and 84 is not routed through the second braking device 1000, but the left cord bypass path 7l in the attachment 200 of the second braking device 1000. And the right cord bypass circuit 7r are respectively inserted and guided to the stopper 77b. Specifically, the second lifting / lowering cord CDb2 passes through the right cord detour 7r after its extending direction is slightly turned by a turning pulley 90f provided in front of the attachment 200, and then behind the attachment 200. The extending direction is further turned by the provided turning pulley 90h, and finally guided to the stopper 77b via the turning pulley 97b provided at the end of the stopper 77b. The second elevating cord CDb4 has a turning pulley provided at the rear of the attachment 200 after passing the left cord detour 7l after its extending direction is slightly turned by a turning pulley 90a provided in front of the attachment 200. The extending direction is further turned by 90 g, and finally guided to the stopper 77 b via a turning pulley 98 b provided at the end of the stopper 77 b. More specifically, the second lifting / lowering cords CDb1, CDb3, and CDb5 inserted into the braking device 1000 and the second lifting / lowering cords CDb2 and CDb4 that are not inserted into the braking device 1000 are all rectified before the stopper 77b. To the stopper 77b.

  After that, the stopper 77b passes through the gear box 76b, exits from the cord one end outlet 86b to the head box 101, and the second lifting / lowering cords CDb1 to CDb5 are suspended as the operation cord 104b by the operator (see FIG. 1). ).

2.2 Effects As described above, also in the pleated screen 100 according to the second embodiment, the first brake device 1000a is provided in the head box 101 in order to prevent the intermediate rail 103a from suddenly descending. And the raising / lowering speed of the intermediate rail 103a is adjusted by inserting the 1st raising / lowering cord CDa through the 1st braking device 1000a. That is, the lowering speed of the intermediate rail 103a is configured to be smaller than the lowering speed of the bottom rail 103b. Thereby, the problem that the user feels dazzling can be solved, and a more human-friendly pleated screen 100 can be realized.

  Further, in the pleated screen 100 according to the first embodiment, the braking of the bottom rail 103b is not specially braked. However, in the pleated screen 100 according to the second embodiment, the second braking device 1000b is provided. The second elevating cord CDb is also applied with a braking force like the first elevating cord CDa. As a result, there is an effect of suppressing the bottom rail 103b from dropping rapidly. In particular, when the bottom rail 103b suddenly descends, an impact sound is generated by hitting a window frame or the like, an operator or a person in the vicinity collides with it, and the product itself is damaged. Such a risk can be suppressed. That is, it is preferable because a safer product can be realized as compared with the prior art.

3. Third Embodiment Section 3 describes in detail a shielding device (pleated screen 100) according to a third embodiment. In addition, about the part which is common in the pleat screen 100 which concerns on 1st and 2nd embodiment, the description is abbreviate | omitted.

3.1 Configuration The pleated screen 100 according to the third embodiment gives a resistance force (friction resistance) to the second lifting / lowering cord CDb instead of the second braking device 1000b used in the pleated screen 100 according to the second embodiment. A friction mechanism 78 is provided. The friction mechanism 78 is less expensive than the second braking device 1000b in terms of manufacturing cost.

  FIG. 25 is a plan view of the inside (operation side) of the head box 101 according to the third embodiment. FIGS. 26 and 27 are sectional views showing a friction mechanism 78 according to the third embodiment, to which a heart cam 781 (an example of a “movable member”, particularly a “rotating member” in the present invention) is applied.

  The friction mechanism 78 includes a housing 780, a heart cam 781, and sandwiching portions 783 and 784. Inside the housing 780, the heart cam 781 is rotatably supported. A gear-shaped uneven portion 782 is formed at the tip of the heart cam 781. Further, the second lifting / lowering cord CDb inserted through the friction mechanism 78 is slidably held by the holding portions 783 and 784, and when the second lifting / lowering cord CDb moves to the operation side, the holding portions 783 and 784 also generate frictional force. (See FIGS. 26 and 27). Here, the friction mechanism 78 is configured to be able to convert the translational motion of the clamping portions 783 and 784 into the rotational motion of the heart cam 781.

  That is, when the second lifting / lowering cord CDb moves in one direction from the dimming side to the operation side (that is, the bottom rail 103b is lowered), the holding portions 783 and 784 are also moved in the same direction by the frictional force, and thereby the heart cam It rotates so that 781 rises to the operation side. Then, the concavo-convex portion 782 of the heart cam 781 directly contacts the second lifting / lowering cord CDb, and appropriate frictional resistance is imparted to the second lifting / lowering cord CDb (FIG. 27). It is preferable that the concavo-convex portion 782 is appropriately rounded to such an extent that the movement of the second lifting / lowering cord CDb is not completely blocked (that is, becomes a stopper). On the other hand, when the second lifting / lowering cord CDb moves from the operation side toward the dimming side (when the bottom rail 103b is raised), the heart cam 781 is in the state shown in FIG. .

3.2 Effects As described above, also in the pleated screen 100 according to the third embodiment, the first braking device 1000a is provided in the head box 101 in order to prevent the intermediate rail 103a from suddenly descending. And the raising / lowering speed of the intermediate rail 103a is adjusted by inserting the 1st raising / lowering cord CDa through the 1st braking device 1000a. That is, the lowering speed of the intermediate rail 103a is configured to be smaller than the lowering speed of the bottom rail 103b. Thereby, the problem that the user feels dazzling can be solved, and a more human-friendly pleated screen 100 can be realized.

  Further, in the pleated screen 100 according to the first embodiment, the braking of the bottom rail 103b was not specially braked. However, in the pleated screen 100 according to the third embodiment, the friction mechanism 78 is provided to provide the first 2 Friction resistance is applied to the lifting / lowering cord CDb. Although this frictional force is smaller than the braking force by the second braking device 1000b according to the second embodiment, it still has the effect of suppressing the bottom rail 103b from dropping rapidly. In particular, when the bottom rail 103b suddenly descends, an impact sound is generated by hitting a window frame or the like, an operator or a person in the vicinity collides with it, and the product itself is damaged. Such a risk can be suppressed. That is, it is preferable because a safer product can be realized as compared with the prior art.

4). Fourth Embodiment In Section 4, the shielding device (pleated screen 100) according to the fourth embodiment will be described in detail. In addition, about the part which is common in the pleats screen 100 which concerns on 1st-3rd embodiment, the description is abbreviate | omitted.

4.1 Configuration The pleated screen 100 according to the fourth embodiment is similar to the pleated screen 100 according to the third embodiment, and imparts resistance to the first lifting / lowering cord CDa, and the gear box 76a functions as a friction mechanism. It is. Because of such a configuration, the manufacturing cost is lower than that of the braking device 1000.

  FIG. 28 is a plan view of the inside (operation side) of the head box 101 according to the fourth embodiment. FIGS. 29 and 30 are sectional views showing a friction mechanism (gear box 76b) according to the fourth embodiment, to which a movable pulley 761 (an example of a “movable member” in the present invention, particularly an example of a “slide member”) is applied. .

  The gear box 76b includes a movable pulley 761, a guide groove 762, and a guide pulley 763 (an example of an “opposing member” in the present invention) inside the gear box 76b. The movable pulley 761 is provided so as to be slidable up and down along the guide groove 762. The extending direction of the second lifting / lowering cord CDb inserted through the gear box 76b is changed from the horizontal direction to the vertical direction by the guide pulley 763. Further, the second lifting / lowering cord CDb suspended in the extending direction comes into contact with the movable pulley 761 as shown in FIG.

  When the suspended second lifting / lowering cord CDb moves in one direction from above to below (when the bottom rail 103b is lowered), the movable pulley 761 rotates counterclockwise by friction and moves upward along the guide groove. To do. Here, as shown in FIG. 29 and FIG. 30, the guide groove 762 is provided so that the distance from the suspended second raising / lowering cord CDb approaches from the lower side to the upper side. Therefore, when the movable pulley 761 moves upward along the guide groove 762, the second lifting / lowering cord CDb is clamped (strongly directly contacted) between the movable pulley 761 and the guide pulley 763 located in the vicinity thereof while being bent, Appropriate resistance is applied (FIG. 30). On the other hand, when the suspended second lifting / lowering cord CDb moves from below to above (when the bottom rail 103b is raised), the movable pulley 761 is in the state shown in FIG. Not granted.

4.2 Effects As described above, also in the pleated screen 100 according to the fourth embodiment, the first brake device 1000a is provided in the head box 101 in order to prevent the intermediate rail 103a from suddenly descending. And the raising / lowering speed of the intermediate rail 103a is adjusted by inserting the 1st raising / lowering cord CDa through the 1st braking device 1000a. That is, the lowering speed of the intermediate rail 103a is configured to be smaller than the lowering speed of the bottom rail 103b. Thereby, the problem that the user feels dazzling can be solved, and a more human-friendly pleated screen 100 can be realized.

  Further, in the pleated screen 100 according to the first embodiment, the brake of the bottom rail 103b is not specially braked. However, in the pleated screen 100 according to the fourth embodiment, the friction mechanism 78 is provided to provide the first 2 Friction resistance is applied to the lifting / lowering cord CDb. Although this frictional force is smaller than the braking force by the second braking device 1000b according to the second embodiment, it still has the effect of suppressing the bottom rail 103b from dropping rapidly. In particular, when the bottom rail 103b suddenly descends, an impact sound is generated by hitting a window frame or the like, an operator or a person in the vicinity collides with it, and the product itself is damaged. Such a risk can be suppressed. That is, it is preferable because a safer product can be realized as compared with the prior art.

5). Conclusion As described above, according to the above-described embodiment, it is possible to provide a human-friendly pair-type shielding device that also considers the characteristics of the human eye.

  The pleated screen 100 is merely an example, and may be implemented as a horizontal blind, for example.

  While various embodiments according to the present invention have been described, these are presented as examples and are not intended to limit the scope of the invention. The novel embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. The embodiments and the modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

2ta: pulley arrangement hole 2tb: pulley arrangement hole 2td: pulley arrangement hole 2te: pulley arrangement hole 2tf: pulley arrangement hole 2tg: pulley arrangement hole 2th: pulley arrangement hole 3b: bottom 3bc: bottom 3bf: bottom 3br: bottom 3t: canopy Portion 4il: left inner wall 4ir: right inner wall 41: left wall 4r: right wall 5b: back surface 5f: front surface 5r: back surface 5ra: partition 5rb: partition 6a: opening 6b: opening 6c: opening 7l: Left cord bypass 7r: Right cord bypass 8al: Claw portion 8ar: Claw portion 8b: Mounting cylinder 8fl: Locking portion 8fr: Locking portion 8rl: Locking portion 8rr: Locking portion 10A: Case 13: Hook 16 : First top wall groove 16A: first guide wall 17: second top wall groove 17A: second guide wall 31: shaft core 40: idle roller 41: shaft core 42: roller portion 50: pin ON gear 70: base 71: first support member 72: second support member 72w: wall portion 73: third support member 74: fourth support member 75: fifth support member 76a: gear box 76b: gear box 77a: stopper 77b : Stopper 78: Friction mechanism 81: Cord other end outlet 82: Cord other end outlet 83: Cord other end outlet 84: Cord other end outlet 85: Cord other end outlet 86a: Cord one end outlet 86b: Cord one end outlet 90a: Turning pulley 90b: Turning pulley 90d: Turning pulley 90e: Turning pulley 90f: Turning pulley 90g: Turning pulley 90h: Turning pulley 97: Turning pulley 97a: Turning pulley 97b: Turning pulley 98b: Turning pulley 100: Pleated screen 101: Head box 101al: Projection 101ar: Projection 102a: Up Clean 102b: Lower screen 102c: Crease 102p: Pleat piece 103a: Intermediate rail 103b: Bottom rail 104a: Dimming cord 104b: Operation cord 106: Pitch holding cord 115: Inner peripheral gear 200: Attachment 200s: Internal space 220: Slider 221 : One end port 222: other end port 240: knurled 241: washer 260: carrier with internal teeth 261: internal gear 280: planetary gear 320: weight holder 323 with sun gear: sun gear 340: weight 702: mounting cylinder 706: first base Groove 707: second base groove 761: moving pulley 762: guide groove 763: guide pulley 780: housing 781: heart cam 782: uneven portion 783: clamping portion 784: clamping portion 1000: braking device 1000a: first braking device 1000b: second braking device CDa: first lifting code CDa1: first lifting code CDa2: first lifting code CDa3: first lifting code CDa4: first lifting code CDa5: first lifting code CDb: second lifting code CDb1: Second lift code CDb2: Second lift code CDb3: Second lift code CDb4: Second lift code CDb5: Second lift code SP: Coil spring

Claims (14)

An upper shielding material that shields between the head box and the intermediate rail; a lower shielding material that shields between the intermediate rail and the bottom rail; a dimming cord and a lifting / lowering cord; and the head of the dimming cord In the shielding device in which the upper shielding material opens and closes with the movement of the dimming cord when the amount of drawer from the box is changed, and the bottom rail moves up and down with the movement of the lifting cord,
A first speed adjustment device is provided in the head box,
The first speed adjusting device is configured to apply a braking force only to the dimming cord as the dimming cord moves in one direction so that the dimming amount gradually changes at a substantially constant pace. By preventing sudden changes in light control amount,
Shielding device. The shielding device according to claim 1.
The lowering speed of the intermediate rail is configured to be smaller than the lowering speed of the bottom rail.
Shielding device. The shielding apparatus according to claim 1 or 2,
The upper shielding material is a race, and the lower shielding material is a drape;
Shielding device. In the shielding apparatus as described in any one of Claims 1-3,
First and second stoppers are further provided in the head box,
The first stopper is configured to be capable of selecting the holding or releasing of the dimming cord by changing the pulling amount of the dimming cord, and the second stopper changes the pulling amount of the lifting / lowering cord. It is configured to be able to select holding or releasing the lifting cord by
Even when the pull-out amount of the lifting / lowering cord is changed in a state where the first stopper is released, the dimming amount gradually changes at a substantially constant pace by the braking force by the first speed adjusting device. Features
Shielding device. In the shielding apparatus as described in any one of Claims 1-4,
The first speed adjustment device includes a motion conversion unit and a resistance application unit,
The motion conversion unit is configured to convert one-way movement of the dimming cord into a motion of a rotating member included in the resistance applying unit, and the rotating member generates a braking force.
Shielding device. The shielding device according to claim 5, wherein
The resistance applying portion is a centrifugal governor,
The centrifugal governor rotates the predetermined member and moves to the outer diameter side by centrifugal force to contact other members and generate a braking force.
Shielding device. In the shielding apparatus as described in any one of Claims 1-6,
A second speed adjustment device is provided in the head box,
The second speed adjusting device is configured to apply a braking force only to the lifting / lowering cord with one-way movement of the lifting / lowering cord.
Shielding device. In the shielding apparatus as described in any one of Claims 1-6,
A friction mechanism is provided in the head box,
The friction mechanism is in contact with only the lifting cord to generate friction,
Shielding device. The shielding device according to claim 8.
The friction mechanism uses a movable member,
When the lifting / lowering cord moves in one direction, the movable member moves, whereby at least the movable member contacts the lifting / lowering cord to generate friction,
Shielding device. The shielding device according to claim 9, wherein
The movable member is a rotationally moving member that has a concavo-convex portion at a front end and the concavo-convex portion rotates around a rear end,
When the lifting / lowering cord moves in one direction, the uneven portion rotates and contacts the lifting / lowering cord to generate friction.
Shielding device. The shielding device according to claim 8.
The movable member uses a slide member that can slide along the guide groove,
When the elevating cord moves in one direction, the slide member slides, whereby the slide member and the opposing member located in the vicinity thereof pinch the elevating cord and generate friction.
Shielding device. The shielding device according to claim 11.
The slide member is a moving pulley, and the opposing member is a guide pulley.
Shielding device. In the shielding apparatus as described in any one of Claims 1-12,
The dimming cord consists of a plurality and these are suspended in parallel,
The first speed adjusting device brakes the movement in one direction of the dimming cord hanging from both ends of the plurality of dimming cords;
Shielding device. In the shielding apparatus as described in any one of Claims 1-13,
The plurality of dimming cords are hung down on the back side of the shielding material, whereby the plurality of dimming cords are not visually recognized in a front view.
Shielding device.