JP7018782B2 - Cloaking device - Google Patents

Description

The present invention relates to a cloaking device.

Various cloaking devices such as roll curtains, blinds, accordion curtains, pleated screen doors and partitions have been put into practical use. Among these, 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 to be able to pull out or fold the two shielding materials arranged side by side in the vertical direction by raising and lowering the intermediate rail and / or the bottom rail by the pulling operation of the cord. See Patent Document 1). Hereafter, we will consider two shielding devices with such shielding materials.

In such a shielding device, two cords for pulling out or folding the two shielding materials up and down are provided. Here, the code related to the upper shielding material is referred to as a first elevating code (first code), and the code related to the lower shielding material is referred to as a second elevating code (second code). In a shielding device having one shielding material, an operation code for opening / closing (elevating) the shielding material is provided, but in a shielding device having two shielding materials as handled in the present specification, the shielding material is used as the lower shielding material. The second elevating code, which is the relevant code, corresponds to the operation code.

Japanese Unexamined Patent Publication No. 2008-08649

By the way, in a shielding device (so-called direct pull type shielding device) in which there are two such shielding materials and the shielding material can be opened and closed by directly pulling the cord, the operator lowers the upper shielding material. It may be noticed that the first cord related to the upper shielding material is not lowered even if the first cord related to the upper shielding material is operated, and then the second cord related to the lower shielding material may be operated continuously. At this time, the stopper for holding the first code is still released (see FIG. 29A) and the stopper for holding the second code is also released by the operation for the first code (see FIG. 29B). When the gravity of the two upper and lower shielding materials is applied to the bottom rail, the bottom rail drops sharply (see FIG. 29C). Then, there is a problem that there is a risk that this will hit the window frame etc. and generate an impact sound, the operator or people around him will collide with this and get injured, or the product itself will be damaged. I am concerned. Therefore, a cloaking device with higher safety is desired.

The present invention has been made in view of such circumstances, and provides a shielding device having two shielding materials and having higher safety.

According to the present invention, the upper shielding material that shields between the head box and the intermediate rail, the lower shielding material that shields between the intermediate rail and the bottom rail, and the first and second cords are provided. When the amount of the first and second cords pulled out from the headbox is changed, the upper shielding material opens and closes with the movement of the first cord, and the bottom rail moves up and down with the movement of the second cord. In the device, a speed adjusting device is provided in the head box, and the speed adjusting device is configured to apply a braking force only to the second code as the second code moves in one direction. A shielding device is provided.

The shielding device according to the present invention has a second cord that hangs from the inside of the head box to the bottom rail via an intermediate rail and suspends and supports the bottom rail so as to be able to move up and down by a pulling operation. It is characterized in that a speed adjusting device configured to brake is provided in the headbox. Since this speed adjusting device employs a centrifugal governor and has a large resistance to the target, it is advantageous that the shielding material can suppress the sudden descent of the bottom rail, which has been a problem in the conventional two shielding devices. It works.

Preferably, a stopper is further provided in the head box, and by changing the withdrawal amount, the stopper can be configured to be able to select the state of holding the first or second cord or the release thereof.
Preferably, the speed adjusting device is subjected to either the gravity of the bottom rail and the lower shield material, and the gravity of the intermediate rail and the upper shield material and the bottom rail and the lower shield material. The braking force is configured to be applied so that the cord moves at substantially equal speeds.
Preferably, the speed adjusting device includes a motion conversion unit and a resistance applying unit, and the motion conversion unit converts the one-way movement of the second code into the motion of the rotating member included in the resistance applying unit. The rotating member is configured to generate a braking force.
Preferably, the resistance-imparting portion is a centrifugal governor, in which the predetermined member rotates and moves to the outer diameter side by centrifugal force to come into contact with another member to generate a braking force.
Preferably, the resistance applying portion is an oil damper, in which the predetermined member rotates in the oil to generate a braking force by the viscous resistance of the oil.
Preferably, a friction mechanism is provided in the headbox, and the friction mechanism contacts only the first cord to generate friction.
Preferably, the frictional force due to the friction is smaller than the braking force of the speed adjusting device.
Preferably, the friction mechanism uses a movable member, and when the first cord moves in one direction, the movable member moves, whereby at least the movable member comes into contact with the first cord to cause friction.
Preferably, the movable member is a rotationally moving member having a concavo-convex portion at the tip and rotating around the rear end, and when the first cord moves in one direction, the concavo-convex portion rotates. It moves and comes into contact with the first cord to cause friction.
Preferably, the first cord is further provided with a stopper that holds the cord and hinders movement, and the friction mechanism is arranged adjacent to the stopper.
Preferably, the movable member uses a slide member that can slide along the guide groove, and when the first cord moves in one direction, the slide member slides, whereby the slide member is positioned in the vicinity of the slide member. The facing member and the facing member sandwich the first cord to cause friction.
Preferably, the slide member is a moving pulley and the opposing member is a guide pulley.
Preferably, the second cord is composed of a plurality of cords and these are suspended in parallel, and the speed adjusting device brakes the movement of the second cord suspended at both ends of the plurality of second cords in one direction. do.
Preferably, the plurality of second cords hang down on the back surface side of the shielding material, whereby the plurality of second cords are not visible in the front view.

The front view of the pleated screen which concerns on 1st to 3rd Embodiment. Side view (partial excerpt) of the pleated screen according to the first to third embodiments. The plan view of the inside of the head box which concerns on 1st Embodiment. The plan view of the inside (dimming side) of the head box which concerns on 1st Embodiment. The plan view of the inside (operation side) of the head box which concerns on 1st to 3rd Embodiment. Top view of the inside of the headbox according to the modified example. 7A is a diagram showing a stopper in the state of FIG. 7B, and FIG. 7B is a front view showing an opening / closing operation of the pleated screen according to the first to third embodiments. 8A is a diagram showing a stopper in the state of FIG. 8B, and FIG. 8B is a front view showing an opening / closing operation of the pleated screen according to the first to third embodiments. 9A is a diagram showing a stopper in the state of FIG. 9B, and FIG. 9B is a front view showing an opening / closing operation of the pleated screen according to the first to third embodiments. An exploded perspective view of the braking device according to the first to third embodiments (FIG. 10A is a view seen from the front upper side, and FIG. 10B is a view seen from the rear lower side). A front perspective view of the braking device according to the first to third embodiments (FIG. 11A is an embodiment with an attachment, and FIG. 11B is an embodiment with the attachment removed). A rear perspective view of the braking device according to the first to third embodiments (FIG. 12A is an embodiment with an attachment, and FIG. 12B is an embodiment with the attachment removed). A plan view of the braking device according to the first to third embodiments (FIG. 13A is a mode in which an attachment is attached, and FIG. 13B is a mode in which the attachment is removed). Bottom view of the braking device according to the first to third embodiments (FIG. 14A is an embodiment with an attachment, and FIG. 14B is an embodiment with the attachment removed). The braking device according to the first to third embodiments brakes the second elevating cord, FIG. 15A shows a state in which no tension is applied to the second elevating cord (steady state), and FIG. 15B shows the second elevating cord. The state in which the cord is sandwiched (sandwiched state), FIG. 15C summarizes the rotation directions of each member when the state changes. FIG. 13B is a cross-sectional view taken along the line QQ. The perspective view of the attachment which concerns on 1st to 3rd Embodiment. 12A is a front view of the attachment according to the first to third embodiments, and FIG. 12B is a rear view of the attachment according to the first to third embodiments. FIG. 3 is a cross-sectional view (side view) showing an embodiment in which an attachment and a braking device are arranged in a head box according to the first to third embodiments. FIG. 3 is a cross-sectional view (front view) showing an embodiment in which an attachment and a braking device are arranged in a head box according to the first to third embodiments. FIG. 3 is a cross-sectional view showing a mode in which two second elevating cords are detoured according to the first to third embodiments. It is a figure which shows the difference in the size of the turning pulley provided on the front side of the attachment and the turning pulley provided on the back side according to 1st to 3rd Embodiment (FIG. 23A is a front view, FIG. 23B is a rear view). The plan view of the inside (dimming side) of the head box which concerns on 2nd Embodiment. FIG. 2 is a cross-sectional view showing a friction mechanism to which a heart cam is applied according to a second embodiment. FIG. 2 is a cross-sectional view showing a friction mechanism to which a heart cam is applied according to a second embodiment. The plan view of the inside (dimming side) of the head box which concerns on 3rd Embodiment. FIG. 3 is a cross-sectional view showing a friction mechanism to which a moving pulley is applied according to a third embodiment. FIG. 3 is a cross-sectional view showing a friction mechanism to which a moving pulley is applied according to a third embodiment. 29A and 29B show the problems of the shielding device according to the prior art, and FIGS. 29A and 29B are diagrams showing the left and right stoppers in the state of FIG. 29C, and FIG. 29C shows the shielding device according to the prior art (example: pleated screen). Figure representing.

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

1. 1. In the first embodiment, the shielding device (pleated screen 100) according to the first embodiment of the present invention will be described in detail.

1.1 Cloaking device 1.1.2 Overall configuration FIG. 1 is a front view of the pleated screen 100 according to the first embodiment. FIG. 2 is a side view (partially excerpted) 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 showing a modified example thereof. In the present specification, as shown in FIG. 1 and the like, the right side of the pleated screen 100 in front view will be described as the operation side, and the left side will be described as the dimming side.

As shown in FIG. 1, the pleated screen 100 is supported by suspending an upper screen 102a (an example of the "upper shielding material" in the present invention) that can be bent in a zigzag shape in the vertical direction from the head box 101, and the upper screen thereof. An intermediate rail 103a is attached to the lower end of the 102a. Further, a lower screen 102b (an example of the "lower shielding material" in the present invention) that can be bent in a zigzag shape in the vertical direction from the intermediate rail 103a is suspended and supported, and the bottom rail 103b is attached to the lower end of the lower screen 102b. Has been done. The upper and lower screens 102a and 102b are each formed by bending one piece of cloth in a zigzag shape.

The pleated pieces 102p constituting the upper and lower screens 102a and 102b are configured to form creases 102c. An insertion hole is provided in the fold 102c of the upper screen 102a, through which the first and second elevating cords CDa and CDb are inserted. The intermediate rail 103a is suspended and supported by attaching the intermediate rail 103a to the lower end of the first elevating cord CDa (the first cord in the present invention). Further, an insertion hole is also provided in the crease 102c of the lower screen 102b, through which the second elevating cord CDb (second cord in the present invention) is inserted. The bottom rail 103b is suspended and supported by attaching the bottom rail 103b to the lower end of the second elevating cord CDb.

As shown in FIG. 3, both the first elevating cord CDa and the second elevating cord CDb are composed of five, but this is just an example and is not limited to this. For example, as shown in FIG. 6, both the first elevating cord CDa and the second elevating cord CDb may be composed of two. With such a configuration, the head box 101 can be miniaturized, that is, the pleated screen 100 itself can be miniaturized. The details of each of the cases of 5 pieces and 2 pieces will be described later.

The first elevating cord CDa is introduced into the head box 101 from the other end outlets 81 to 85 of the cord, and is guided to the dimming side in FIGS. 3 to 5. Then, it is hung from one end of the cord exit 86a and is operably located near the operator's hand as a dimming cord 104a. The operator can move the upper screen 102a up and down together with the intermediate rail 103a by operating the dimming code 104a located on the left side (dimming side) when viewed from the front. Here, by using different fabrics for the upper screen 102a and the lower screen 102b (for example, the upper screen 102a is a lace fabric, the lower screen 102b is a drape fabric, etc.), the pleated screen 100 can be dimmed.

On the other hand, the second elevating cord CDb also conducts from the other end outlets 81 to 85 of the cord into the head box 101, and is guided to the operation side in FIGS. 3 to 5 via the braking device 1000 or the like described later. Then, it hangs down from the exit 86b at one end of the cord and is operably located near the operator's hand as the operation code 104b. The operator can move the lower screen 102b up and down together with the bottom rail 103b by operating the operation code 104b located on the right side (operation side) when viewed from the front.

It should be noted that the second elevating cord CDb is hung on the back side of the upper and lower screens 102a and 102b as shown in FIG. 1, so that it cannot be visually recognized in the front view.

As shown in FIG. 5, the pleated screen 100 is suitable for the second elevating cord CDb when the bottom rail 103b is lowered by the braking device 1000 (speed adjusting device in the present invention) provided on the operation side of the head box 101. The bottom rail 103b can be lowered with an appropriate descent speed by applying a sufficient braking force. Here, by adopting the attachment 200 described later, it is possible to apply an appropriate braking force only to the bottom rail 103b by inserting only a part of the five (for example, three) second elevating cords CDb. It has become. This will be described in detail later. On the other hand, as shown in FIG. 4, a braking device is not provided on the dimming side inside the head box 101. That is, the braking force by the braking device is not applied to the first elevating cord CDa.

A pitch holding cord 106 is hung from the head box 101 on the back side of the upper and lower screens 102a and 102b. The upper end of the pitch holding cord 106 is attached to the head box 101, and the lower end thereof is 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 elevating cords CDa and CDb are inserted therein. That is, the holding portion is configured to surround the side circumferences of the first and second elevating cords CDa and CDb. With such a configuration, when the bottom rail 103b is lowered to the lower limit as shown in FIG. 1, the tip end portion of each holding portion engages with the first and second elevating cords CDa and CDb, and each holding portion. Each crease is supported from below, and the folds of the upper and lower screens 102a and 102b are independently held at equal intervals.

1.1.2 Flow of operation Next, the flow of operation of the pleated screen 100 will be described in detail. 7 to 9 are front views showing an opening / closing operation of the pleated screen 100 according to the first embodiment.

When the operator pulls down the dimming code 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 near the middle between the headbox 101 and the bottom rail 103b. The five first elevating cords CDa connected to the head box 101 are pulled into the head box 101, and the intermediate rail 103a rises. Then, as the intermediate rail 103a rises, the upper screen 102a is sequentially folded from the lower side, and the lower screen 102b is stretched upward. Then, when the intermediate rail 103a is raised to the highest position, the pleated screen 100 is in the state shown in FIG. 7. When the operation of the dimming cord 104a is stopped, the stopper 77a locks the movement of the first elevating cord CDa, so that the intermediate rail 103a can be operated so as to be in 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 released state depending on the amount of the dimming code 104a pulled out.

Next, when the operation code 104b is pulled down with the intermediate rail 103a raised as shown in FIG. 7, the five second elevating cords CDb connected to the operation code 104b are pulled into the head box 101, and the bottom rail 103b is raised. Then, as the bottom rail 103b rises, the lower screen 102b is sequentially folded from below. Then, 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 elevating code CDb, so that the bottom rail 103b can be operated so as to be in a desired position.

Next, when the operation code 104b is slightly pulled down from the state where both the intermediate rail 103a and the bottom rail 103b are in the highest positions as shown in FIG. 8, the stopper 77b is unlocked and the second elevating code CDb can be moved. It becomes a state. Then, the bottom rail 103b can be lowered 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 in the state shown in FIG. 7 again.

By the way, if the operation code 104b is released during the operation of lowering the bottom rail 103b, the bottom rail 103b may fall vigorously due to its own weight. More specifically, as described in [Problems to be Solved by the Invention], the operator noticed that the dimming code 104a was operated to lower the upper screen 102a but did not lower the screen 102a. When the operation code 104b related to the screen 102b is operated, the stopper 77a that holds the dimming code 104 is still released, and the gravity of the upper and lower screens 102a and 102b is applied to the stopper 77a, so that the bottom rail 103b drops sharply. (See FIGS. 29A to 29C).

However, the pleated screen 100 includes a braking device 1000, and the movement of the second elevating cord CDb toward the operation side (that is, the direction in which the bottom rail 103b descends) is braked, so that the operation code 104b is released. Also, the bottom rail 103b (and the lower screen 102b) can be slowly lowered. In particular, the braking device 1000 is configured to apply a braking force so as to prevent the second elevating cord CDb from moving due to the gravity of the intermediate rail 103a, the bottom rail 103b, and the upper and lower screens 102a and 102b. Rail. When the bottom rail 103b descends due to its own weight, the moving speed of the second elevating cord CDb becomes substantially constant where the tension applied to the second elevating cord CDb and the braking force of the braking device 1000 are balanced.

On the other hand, when the dimming cord 104a is slightly pulled down from the state of FIG. 8, the stopper 77a is unlocked and the first elevating cord CDa becomes movable. Then, by operating the dimming code 104a in this state, the intermediate rail 103a can be lowered. When the intermediate rail 103a is lowered to the lowest position, the pleated screen 100 is in the state shown in FIG.

1.2. Braking device 1.2.1 Outline of parts The braking device 1000 will be described with reference to FIGS. 10 to 16. The braking device 1000 is a braking device that brakes the movement of the cord. Specifically, in the braking device 1000, the mechanism related to the motion conversion unit and the mechanism related to the resistance applying unit are provided so as to be positioned substantially in the vertical direction. Here, as shown in FIG. 10, the motion conversion unit includes a slider 220, a coil spring SP, an idle roller 40 including a shaft core 41 and a roller portion 42, a knurl 240, a pinion gear 50, a shaft core 31, and a washer 241. It is composed of a toothed carrier 260 and a planetary gear 280, and the resistance imparting portion is composed of a weight 340, a weight holder 320 with a sun gear, and a case 10A.

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 knurl 240, a pinion gear 50, a shaft core 31 through which the knurl 240 and the pinion gear 50 are inserted, and a washer. (Not shown), a carrier with internal teeth 260, 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 later.

The idle roller 40 and the knurl 240 function as a sandwiching body for sandwiching the cord. Further, the idle roller 40 functions as a support column, and the knurl 240 functions as a roller that rotates due to the movement of the cord in the longitudinal direction. Further, the slider 220 holds the idle roller 40 and the knurl 240.

As shown in FIG. 10, the carrier 260 with internal teeth is provided with four planetary gears 280, and the weight holder 320 with sun gears holds eight weights 340.

1.2.2 Assembly Configuration Next, the state in which each of these members is assembled will be described with reference to FIGS. 11 to 14. FIG. 11A is a front perspective view of the braking device 1000 and shows a state in which the attachment 200 is attached, and FIG. 11B is a view showing a state in which the attachment 200 is removed. FIG. 12A is a rear perspective view of the braking device 1000 and shows a state in which the attachment 200 is attached, and FIG. 12B is a view showing a state in which the attachment 200 is removed.

As shown in FIGS. 11A and 11B, three of the five second elevating cords CDb are inserted into the braking device 1000. Further, in the appearance of the braking device 1000, the second elevating cord CDb is derived from the slider 220 at both ends. In the present specification, the outlet of the second elevating cord CDb provided on the rear side of the braking device 1000 is one end port 221 (see FIG. 12B), and the guide of the second elevating cord CDb provided on the front side of the braking device 1000. The outlet is referred to as the other end port 222 (see FIG. 11B).

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

Then, the first guide wall 16A provided on the edge of the first top wall groove 16 comes into contact with the shaft core 31, and the second guide wall 17A provided on the edge of the second top wall groove 17 hits the shaft core 41. I'm in contact.

Further, as shown in FIG. 14, in the bottom view of the base 70, the lower end of the shaft core 31 inserted through the first base groove 706 and the lower end of the shaft core 41 inserted through the second base groove 707 are visually recognized. can do.

1.2.3 Internal Configuration With reference to FIGS. 15 and 16, the relative positions between the members in the assembled state will be described in more detail. As shown in FIG. 15, the pinion gear 50 centered on the shaft core 31 and the internal gear 261 provided on the carrier with internal teeth 260 are meshed 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 carrier 260 with internal teeth. Then, the planetary gear 280 meshes with the sun gear 323 provided on the weight holder 320 with the sun gear and the inner peripheral gear 115 provided inside the case 10A. Therefore, by applying rotation to the pinion gear 50, the planetary gear 280 can revolve around the center of the internal gear 261 in the space formed between the sun gear 323 and the inner peripheral gear 115. ..

FIG. 16 is a cross-sectional view taken along the line QQ of FIG. 13B. As shown in FIG. 16, the shaft core 31 and the shaft core 41 project from the upper end of the case 10A 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 knurl 240 and the roller portion 42 are located inside the slider 220. Further, the pinion gear 50 is located outside the slider 220 in a state where the slider 220 is sandwiched in cooperation with the knurl 240. Further, the pinion gear 50 and the internal gear 261 are in mesh with each other.

Then, from the upper side of the case 10A to the flange portion 13, the attachment 200 is covered. Further, the case 10A is engaged with the base 70 at the lower end thereof. A weight 340 is held on the upper part of the base 70.

1.2.4 Operation Next, the operation of the braking device 1000 will be described again with reference to FIG. FIG. 15A shows a state in which no tension is applied to the second elevating cord CDb (steady state), and FIG. 15B shows a state in which tension is applied to the second elevating cord CDb and the second elevating cord CDb is sandwiched between the knurl 240 and the roller portion 42. FIG. 15C is a diagram summarizing the rotation directions of each member when the state changes from FIG. 15A to FIG. 15B. Here, for convenience of explanation, the outer circumference of the roller portion 42, which does not appear in the cross-sectional view, is displayed so as to be superimposed on the periphery of the shaft core 41, and the outer circumference of the knurl 240 is displayed so as to be superimposed on the periphery of the shaft core 31. Although the outer circumference of the knurl 240 is not strictly circular, it is shown in an approximate circular shape for the sake of simplicity of explanation.

In the steady state shown in FIG. 15A, the coil spring SP abuts on the inner wall behind the case 10A and pushes the slider 220 forward. Therefore, the slider 220 is located 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. And move forward with the slider 220. Further, the first top wall groove 16 and the second top wall groove 17 provided in the case 10A held on the upper part of the slider 220 become smaller in distance from each other 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. Therefore, the distance between the roller portion 42 rotatably supported by the shaft core 41 and the knurl 240 rotatably supported by the shaft core 31 is also reduced. That is, the first top wall groove 16 and the first base groove 706 function as a regulating groove that regulates that the shaft core 31 of the knurl 240 is movably fitted and the knurl 240 does not move along the groove. Similarly, the second top wall groove 17 and the second base groove 707 serve as a regulating groove that regulates that the shaft core 41 of the roller portion 42 is movably fitted and the roller portion 42 does not move along the groove. Function. Further, since the first top wall groove 16 and the first base groove 706 are formed concentrically with the center point of the inner peripheral surface of the carrier with internal teeth 260 in a plan view, the shaft core 31 moves in each groove. Nevertheless, the pinion gear 50 can continue to mesh with the internal gear 261 provided on the carrier 260 with internal teeth.

As described above, when the distance between the knurl 240 and the roller portion 42 becomes smaller, the knurl 240 is pressed by the roller portion 42, and the second elevating cord CDb is sandwiched between the knurl 240 and the roller portion 42. That is, the coil spring SP also functions as an urging member that constantly urges the knurl 240 so that the knurl 240 is pressed against the roller portion 42.

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

Then, as shown in FIG. 15B, when the knurl 240 and the roller portion 42 approach the limit (sandwiched state), the knurl 240 continues to rotate but stops moving along the internal gear 261 of the knurl 240. 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 10A due to the centrifugal force, so that a resistance force is generated against rotation. That is, as the moving speed of the second elevating cord CDb increases, the rotation speed increases, which increases the centrifugal force. Then, as the centrifugal force increases, the weight 340 comes into contact with the inner peripheral wall of the case 10A more strongly, and the resistance force increases. As a result, the moving speed of the second elevating cord CDb (the falling speed of the bottom rail 103b shown in FIG. 1) can be suppressed. Here, when the tension applied to the second elevating cord CDb is substantially constant (for example, the bottom rail 103b (see FIG. 1 and the like) suspended so as to be able to elevate to the second elevating cord CDb on the front side of the braking device 1000). In the case of freely descending), the moving speed of the second elevating cord CDb becomes substantially constant where the tension applied to the second elevating cord CDb and the resistance force due to the weight 340 and the inner peripheral wall of the case 10A are balanced. Therefore, the braking device 1000 functions as a rotary damper for the movement of the second elevating cord CDb, and the bottom rail 103b (see FIG. 1 and the like) can be slowly lowered (that is, a centrifugal governor).

FIG. 15C is a summary of the rotational directions of each member (for the pinion gear 50, the front-rear direction and the tightening direction in a plan view are also included) for the state change from the steady state to the pinched state described above.

On the other hand, when tension is applied to the second elevating cord CDb in the direction opposite to the arrow D1 (rearward), the knurl 240 and the roller portion 42 rotate in the opposite direction 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 pinching force of the knurl 240 with respect to the second elevating cord CDb is weakened, and the second elevating cord CDb can be pulled with a weak force. Therefore, when the braking device 1000 is provided in the head box, the direction in which tension is applied to the second elevating cord CDb in the front is the direction in which the bottom rail 103b (see FIG. 1 and the like) descends, and the second in the rear. It is preferable that the direction in which tension is applied to the elevating cord CDb is the direction in which the bottom rail 103b (see FIG. 1 and the like) rises.

As described above, in the braking device 1000, when the second elevating cord CDb and the sandwiching body move relative to each other in one direction, the sandwiching body sandwiches the second elevating cord CDb and the sandwiching body moves relative to the other direction. 2 It can be said that the braking device is configured to change the sandwiched state so that the elevating cord CDb is released in the non-bent state. Here, the release of the second elevating cord CDb is a state in which the movement of the second elevating cord CDb is allowed, and the contact or non-contact between the second elevating cord CDb and the sandwiched body does not matter.

1.2.5 Attachments Subsequently, FIGS. 17 to 22 will be used to describe the attachment 200 that can be attached to the braking device 1000. The braking 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 being 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. 19 and 20 are cross-sectional views showing a state in which the attachment 200 and the braking device 1000 are arranged in the head box 101. FIG. 21 is a cross-sectional view showing the difference in size between the turning pulley provided on the front side of the attachment and the turning pulley provided on the 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 housed in the internal space 200s inside the attachment 200. The attachment 200 is substantially symmetrical in appearance and interior. Further, the attachment 200 is surrounded by a canopy portion 3t, a bottom portion 3b, a left side wall portion 4l, a right side wall portion 4r, a front surface portion 5f, and a back surface portion 5r.

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

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

As shown in FIG. 17, the bottom portion 3b is composed of bottom portions 3bf, 3bc, and 3br in order from the front to the rear. The bottom 3bf and 3br are surfaces that come into contact with the head box 101 when placed in the head box 101. A step is provided between the bottom 3bc and the bottom 3bf, 3br, and the bottom 3bc is located at a position higher than the bottom 3bf, 3br. Further, the bottom 3bf is provided with six pulley placement holes (not shown) located facing the pulley placement holes 2ta to 2tf, and the bottom 3bc has two pulley placement holes 2tg and two located facing the pulley placement holes 2th. Pulley placement holes (not shown) are provided respectively.

By passing the pulley shaft through the pair of upper and lower pulley arrangement holes, the turning pulley is provided in the internal space 200s of the attachment 200. For example, FIG. 21 shows a state in which the turning pulleys 90a, 90d, 90f, 90g, and 90h are arranged. The extension direction of the second elevating cord CDb is turned to another direction via these turning pulleys. That is, the turning pulley functions as a turning member of the second elevating cord CDb, and is not limited to the pulley as long as it is a member that turns the extending direction of the second elevating cord CDb.

Since the distance between the opposing pulley placement holes provided in the front and the distance between the facing pulley placement holes provided in the rear are different, as shown in FIGS. 22A and 22B, the turning provided in the front. The height h1 of the pulleys (for example, the turning pulleys 90a, 90d, 90f in FIG. 23A) is larger than the height h2 of the turning pulleys (for example, the turning pulleys 90g, 90h in FIG. 23B) provided behind. When it is desired to reduce the size of the attachment 200, it is assumed that the height h1 of the turning pulley provided in the front is made as small as the height h2 of the turning pulley provided in the rear. However, as shown in FIG. 22B, because the turning pulley provided at the rear is short, the second elevating cord CDb1 located at the lowermost side among the three second elevating cords CDb through which the braking device 1000 is inserted is It will be located below the turning pulley. Therefore, in the forward direction, h1> h2 is set so that the three second elevating cords CDb come into contact with the turning pulley.

The bottom portion 3b is provided with a mounting cylinder 8b used when arranging the attachment 200 in the head box 101. For example, by fitting the mounting cylinder 8b into a member such as a shaft provided in the head box 101, the attachment 200 can be stably arranged in the head box 101. Here, as shown in FIG. 20, both the braking device 1000 and the attachment 200 are locked by the mounting cylinders 702 and 8b penetrating the head box 101.

As shown in FIG. 21, the left side wall portion 4l and the right side wall portion 4r face the left inner wall 4il and the right inner wall 4ir located inside the attachment 200, respectively. The space sandwiched between the left side wall portion 4l and the left inner wall 4il is the left side cord detour 7l. The space sandwiched between the right side wall portion 4r and the right inner wall 4ir is the right side cord detour 7r. By using the left side code detour circuit 7l and the right side code detour circuit 7r (also referred to as code detour circuits 7l and 7r), at least one of the plurality of second elevating code CDbs can be detoured without being inserted into the braking device 1000. Can be done. That is, by extending the non-inserted second elevating cord CDb along the detour circuits 7l and 7r (that is, detouring the braking device 1000), the braking force applied to the second elevating cord CDb is appropriately adjusted. can do. For example, FIG. 18 shows an embodiment in which two second elevating cords CDb are inserted into the cord detours 7l and 7r. The cord detours 7l and 7r are provided on both sides of the roller portion 42 and the knurl 240 (cord capture portion) in the braking device 1000.

Further, as shown in FIG. 21, the left inner wall 4il and the right inner wall 4ir are provided with claw portions 8al and 8ar, respectively. The braking device 1000 is used when the braking device 1000 is installed in the internal space 200s and integrated. At the time of installation, the claw portions 8al and 8ar engage with the engaging hole (not shown) of the case 10A. As a result, the case 10A enters while the left inner wall 4il and the right inner wall 4ir are elastically deformed outward, and the claw portions 8al and 8ar provided on the attachment 200 and the two engaging holes provided on the left and right sides of the case 10A are formed. It is possible to engage elastically (so-called snap-fit mechanism).

As shown in FIG. 18A, the front surface portion 5f is formed in a hollow rectangular shape in a plan view. The back surface portion 5r is configured in a hollow rectangular shape in a plan view as shown in FIG. 18B. Further, a partition portion 5ra is provided so as to cross left and right at substantially the center, and a partition portion 5rb is provided above the partition portion 5ra in a U-shape. The openings (cord entrances) related to the back surface 5b are divided into openings 6a, 6b, and 6c by the partition portions 5ra and 5rb, respectively, and the three second elevating cords CDb pass through these openings to the braking device 1000. I will head. When there are three or more second elevating cords CDb, the three second elevating cords CDb are vertically aligned by the attachment 200 regardless of whether or not a part of the second elevating cord CDb is bypassed. Will be 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. 3 to 5.

As shown in FIG. 3, the headbox 101 includes a gearbox 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 arranged. Further, five first elevating cords CDa1 to CDa5 and five second elevating cords CDb1 to CDb5 extend in the head box 101.

The first to fifth support members 71 to 75 are arranged corresponding to the five first elevating cords CDa1 to CDa5 and the second elevating cords CDb1 to CDb5. Further, at the position corresponding to each support member of the head box 101, the other end of the first elevating cord CDa and the second elevating cord CDb (the end on the side supporting the intermediate rail 103a and the bottom rail 103b) is placed in the head box 101. The other end outlet 81 to 85 of the cord for deriving from the cord is provided.

Further, in the attachment 200, a turning pulley 90a having a shaft inserted through a pulley arrangement hole 2ta and a pulley arrangement hole facing the pulley arrangement hole 2ta on the dimming side (in front of the attachment 200), a pulley arrangement hole 2td and facing the pulley arrangement hole 2td. A turning pulley 90d having a shaft inserted through the pulley placement hole and a turning pulley 90f having a shaft inserted through the pulley placement hole 2tf and the pulley placement hole facing the pulley arrangement hole 2tf are arranged. Further, on the operation side (rear of the attachment 200), the shaft is inserted into the pulley placement hole 2tg and the turning pulley 90g in which the shaft is inserted into the pulley placement hole facing the pulley arrangement hole, and the pulley placement hole 2th and the pulley placement hole facing the shaft. A turning pulley 90h and the like are arranged.

One ends of the first elevating cords CDa1 to CDa5 introduced into the headbox 101 from the other end outlets 81 to 85 of the cord are all guided by the stopper 77a on the dimming side. After that, the stopper 77a passes through the gear box 76a, goes out of the head box 101 from the cord one end outlet 86a, and the first elevating cords CDa1 to CDa5 are hung down to the operator's hand as the dimming cord 104a (FIG. 1). reference).

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

On the other hand, one end of the second elevating cords CDb2 and CDb4 introduced into the headbox 101 from the other end outlets 82 and 84 of the cords each of the left side cord detours 7l and the right side cord detours 7r in the attachment 200 without going through the braking device 1000. It is inserted and guided to the stopper 77b. Specifically, the second elevating cord CDb2 is slightly turned in the extending direction by the turning pulley 90f provided in front of the attachment 200, passes through the right side cord detour 7r, and then is rearward of the attachment 200. The extending direction is further turned by the provided turning pulley 90h, and finally, it is guided to the stopper 77b via the turning pulley 97b provided at the end of the stopper 77b. The turning pulley 97 is not limited to the pulley, and for example, a turning member such as a guide wall may be adopted. The second elevating cord CDb4 is a turning pulley provided behind the attachment 200 after the extension direction is slightly turned by the turning pulley 90a provided in front of the attachment 200 and then passing through the left side cord detour circuit 7l. The extension direction is further turned by 90 g, and finally guided to the stopper 77b via the turning pulley 98b provided at the end of the stopper 77b. More specifically, the second elevating cords CDb1, CDb3, and CDb5 inserted into the braking device 1000 and the second elevating cords CDb2 and CDb4 not inserted into the braking device 1000 are all rectified in front of the stopper 77b. Is guided by the stopper 77b.

After that, the stopper 77b passes through the gear box 76b, goes out of the head box 101 from the cord one end outlet 86b, and the second elevating cords CDb1 to CDb5 are hung down to the operator's hand as the operation code 104b (see FIG. 1). ).

By the way, when the operator pulls the operation code 104b to raise the bottom rail 103b, the second elevating cords CDb1 to CDb5 move from the other end port 222 of the braking device 1000 toward the one end port 221 (in other words, from the dimming side). Move (towards the operating side). However, the second elevating cords CDb2 and CDb4 do not pass through the braking device 1000. At this time, the turning pulley 90a rotates counterclockwise as the second elevating cord CDb4 moves. The turning pulley 90d rotates counterclockwise as the second elevating cords CDb1, CDb3, and CDb5 move. The turning pulley 90f rotates clockwise with the movement of the second elevating cord CDb2. The turning pulley 90g rotates counterclockwise as the second elevating cord CDb4 moves. The turning pulley 90h rotates clockwise as the second elevating cord CDb2 moves. On the other hand, when the operator loosens the operation code 104b and lowers the bottom rail 103b, the second elevating cords CDb1 to CDb5 are adjusted from the one end port 221 to the other end port 222 of the braking device 1000 (in other words, from the operation side). Move (towards the light side). At this time, the turning pulley 90a rotates clockwise with the movement of the second elevating cord CDb4. The turning pulley 90d rotates clockwise as the second elevating cords CDb1, CDb3, and CDb5 move. The turning pulley 90f rotates counterclockwise as the second elevating cord CDb2 moves. The turning pulley 90g rotates clockwise with the movement of the second elevating cord CDb4. The turning pulley 90h rotates counterclockwise as the second elevating cord CDb2 moves. That is, the turning pulleys 90a, 90d, 90g and the turning pulleys 90f, 90h are configured to rotate in opposite directions.

Further, of the five second elevating cords CDb, the second elevating cord CDb (here, the second elevating cords CDb1, CDb3, CDb5) through which the braking device 1000 is inserted and the second elevating cord CDb through which the cord detours 7l and 7r are inserted are inserted. The cords CDb (here, the second elevating cords CDb2 and CDb4) are arranged alternately in the longitudinal direction of the headbox 101. By alternately arranging the second elevating cord CDb that is inserted into the braking device 1000 and the second elevating cord CDb that is not inserted, the braking force is evenly applied to the entire second elevating cord CDb, and the head. Tilt of the box 101 can be suppressed.

Note that the braking device 1000 brakes the movement of the second elevating cord CDb (here, the second elevating cord CDb1 and CDb5) hanging at at least both ends of the plurality of second elevating cords CDb in one direction. I want to be.

1.3.1 Modification example The number of the first and second elevating cords CDa and CDb is not necessarily limited to five. Here, the arrangement according to the modified example will be described again with reference to FIG. As shown in FIG. 6, the head box 101 according to the modified example 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 an attachment 200), a second support member 72, a stopper 77a, and a gear box 76a are arranged. Further, two first elevating cords CDa1 and CDa2 and two second elevating cords CDb1 and CDb2 extend in the head box 101.

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

Further, the attachment 200 has a pulley arrangement hole 2tb on the dimming side (in front of the attachment 200), a turning pulley 90b in which a shaft is inserted through the pulley arrangement hole facing the pulley arrangement hole 2tb, a pulley arrangement hole 2te and facing the pulley arrangement hole 2te. A turning pulley 90e having a shaft inserted through the pulley placement hole is arranged. Further, on the operation side (rear of the attachment 200), a pulley arrangement hole 2tf and a turning pulley 90f having a shaft inserted through the pulley arrangement hole facing the pulley arrangement hole 2tf are arranged.

One ends of the first elevating cords CDa1 and CDa2 introduced into the headbox 101 from the other end outlets 81 and 82 of the cord are both guided by the stopper 77a on the dimming side. Specifically, the first elevating cord CDa1 once extends to the operation side in the headbox 101, turns back through the wall portion 71w, and passes through the left cord detour 7l as it is. Then, it is guided to the stopper 77a via the second support member 72. Further, the first elevating cord CDa2 is guided to the stopper 77a after its extending direction is slightly rotated by the turning pulley 97a provided at the end of the stopper 77a.

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

One ends of the second elevating cords CDb1 and CDb2 introduced into the headbox 101 from the other end outlets 81 and 82 of the cord are both guided from the other end port 222 of the braking device 1000 to the stopper 77b on the operation side via the one end port 221. To. In particular, since the other end port 222 of the braking device 1000 faces in the direction of the second support member 72, the second elevating cord CDb1 guided from the first support member 71 is different from the second elevating cord CDb2 in that the attachment 200 is used. After the extension direction is turned by the turning pulley 90e provided in front of the brake device 1000, the pulley is guided to the stopper 77b via the braking device 1000.

After that, the stopper 77b passes through the gear box 76b, goes out of the head box 101 from the cord one end outlet 86b, and the second elevating cords CDb1 and CDb2 are hung down to the operator's hand as the operation code 104b (see FIG. 1). ).

By the way, when the operator pulls the operation code 104b to raise the bottom rail 103b, the second elevating cords CDb1 and CDb2 move from the other end port 222 of the braking device 1000 toward the one end port 221 (in other words, the dimming side). Move from to the operation side). At this time, the turning pulley 90e rotates counterclockwise as the second elevating cord CDb1 moves. On the other hand, when the operator loosens the operation code 104b and lowers the bottom rail 103b, the second elevating cords CDb1 and CDb2 move from the one end port 221 of the braking device 1000 toward the other end port 222 (in other words, from the dimming side). Move (towards the operating side). At this time, the turning pulley 90e rotates clockwise with the movement of the second elevating cord CDb1.

1.4 Effect As described above, in the pleated screen 100 according to the first embodiment (including the modified example), the braking device 1000 is provided in the head box 101 in order to prevent the bottom rail 103b from suddenly descending. Then, the elevating speed of the bottom rail 103b is adjusted by inserting the second elevating cord CDb into the braking device 1000. As a result, there is a risk that the bottom rail 103b may collide with the window frame or the like to generate an impact sound, the operator or people around him may collide with the bottom rail 103b and be injured, or the product itself may be damaged. It can be suppressed. That is, a product with higher safety than the conventional one is realized.

2. 2. In the second embodiment, the shielding device (pleated screen 100) according to the second embodiment will be described in detail. The description of the parts common to the pleated screen 100 according to the first embodiment will be omitted.

2.1 Configuration In the pleated screen 100 according to the first embodiment, the elevating speed of the bottom rail 103b is adjusted by inserting at least a part of the second elevating cord CDb into the braking device 1000. On the other hand, the first elevating cord CDa, which is not involved in the bottom rail 103b, is not provided with any particular resistance. However, it may be configured to impart an appropriate frictional resistance to the first elevating cord CDa. Of course, the problem to be solved is to prevent the bottom rail 103b from suddenly dropping, so the frictional resistance here is smaller than the braking force of the braking device 1000. Specifically, the pleated screen 100 according to the second embodiment includes a friction mechanism 78 that imparts resistance to the first elevating cord CDa. The friction mechanism 78 is cheaper than the braking device 1000 in terms of manufacturing cost.

FIG. 23 is a plan view of the inside (dimming side) of the headbox 101 according to the second embodiment. 24 and 25 are cross-sectional views showing a friction mechanism 78 to which the heart cam 781 (an example of the "movable member", particularly the "rotating moving member" in the present invention) is applied according to the second embodiment.

The friction mechanism 78 includes a housing 780, a heart cam 781, and holding 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 first elevating cord CDa through which the friction mechanism 78 is inserted is slidably sandwiched between the holding portions 783 and 784, and when the first elevating cord CDa moves to the dimming side, the holding portions 783 and 784 also rub. It moves by force (see FIGS. 24 and 25). Here, the friction mechanism 78 is configured so that the translational motion of the holding portions 783 and 784 can be converted into the rotational motion of the heart cam 781.

That is, when the first elevating cord CDa moves in one direction from the operation side toward the dimming side (that is, the intermediate rail 103a descends), the holding portions 783 and 784 also move in the same direction due to the frictional force, whereby the heart cam The 781 rotates and moves so as to rise to the dimming side. Then, the uneven portion 782 of the heart cam 781 comes into direct contact with the first elevating cord CDa, and an appropriate frictional resistance is imparted to the first elevating cord CDa (FIG. 25). It is preferable that the uneven portion 782 is appropriately rounded so as not to completely prevent the movement of the first elevating cord CDa (that is, to serve as a stopper). On the other hand, when the first elevating cord CDa moves from the dimming side to the operation side (when the intermediate rail 103a rises), the heart cam 781 is in the state shown in FIG. 24, and frictional resistance due to the uneven portion 782 is not applied. ..

2.2 Effect As described above, even in the pleated screen 100 according to the second embodiment, the braking device 1000 is provided in the head box 101 in order to prevent the bottom rail 103b from suddenly descending. Then, the elevating speed of the bottom rail 103b is adjusted by inserting the second elevating cord CDb into the braking device 1000. As a result, there is a risk that the bottom rail 103b may collide with the window frame or the like to generate an impact sound, the operator or people around him may collide with the bottom rail 103b and be injured, or the product itself may be damaged. It can be suppressed. That is, a product with higher safety than the conventional one is realized.

Further, in the pleated screen 100 according to the first embodiment, the movement of the intermediate rail 103a is not particularly braked, but in the pleated screen 100 according to the second embodiment, the friction mechanism 78 is provided. 1 Friction resistance is applied to the elevating cord CDa. Although this frictional force is smaller than the braking force of the braking device 1000, it still has the effect of suppressing the sudden drop of the intermediate rail 103a. In particular, it is preferable to have such a configuration because a sudden drop of the intermediate rail 103a may cause the user to feel glare during dimming using the dimming code 104a.

3. 3. Third Embodiment In Section 3, the shielding device (pleated screen 100) according to the third embodiment will be described in detail. The description of the parts common to the pleated screen 100 according to the first and second embodiments will be omitted.

3.1 Configuration The pleated screen 100 according to the third embodiment, like the pleated screen 100 according to the second embodiment, imparts resistance to the first elevating cord CDa, and the gearbox 76a functions as a friction mechanism. Is. Since of such a configuration, the manufacturing cost is lower than that of the braking device 1000.

FIG. 26 is a plan view of the inside (dimming side) of the headbox 101 according to the third embodiment. 27 and 28 are cross-sectional views showing a friction mechanism (gear box 76a) to which a moving pulley 761 (an example of a “movable member”, particularly a “sliding member” in the present invention) is applied according to a third embodiment. ..

Inside, the gearbox 76a includes a moving pulley 761, a guide groove 762, and a guide pulley 763 (an example of the "opposing member" in the present invention). The movable pulley 761 is provided so as to be slidable up and down along the guide groove 762. The extension direction of the first elevating cord CDa through which the gearbox 76a is inserted is changed from the horizontal direction to the vertical direction by the guide pulley 763. Further, the first elevating cord CDa hanging in the extension direction comes into contact with the moving pulley 761 as shown in FIG. 27.

When the first elevating cord CDa to be hung moves in one direction from above to downward (when the intermediate rail 103a descends), the moving pulley 761 rotates clockwise due to friction and moves upward along the guide groove. .. Here, as shown in FIGS. 27 and 28, the guide groove 762 is provided so that the distance from the hanging first elevating cord CDa approaches from the lower side to the upper side. Therefore, when the moving pulley 761 moves upward along the guide groove 762, the first elevating cord CDa bends and is sandwiched (strongly directly contacted) between the moving pulley 761 and the guide pulley 763 located in the vicinity thereof. Appropriate resistance is applied (Fig. 28). On the other hand, when the hanging first elevating cord CDa moves from the lower side to the upper side (when the intermediate rail 103a rises), the moving pulley 761 is in the state shown in FIG. 27, and the resistance force due to bending and pinching is increased. Not granted.

3.2 Effect As described above, even in the pleated screen 100 according to the third embodiment, the braking device 1000 is provided in the head box 101 in order to prevent the bottom rail 103b from suddenly descending. Then, the elevating speed of the bottom rail 103b is adjusted by inserting the second elevating cord CDb into the braking device 1000. As a result, there is a risk that the bottom rail 103b may collide with the window frame or the like to generate an impact sound, the operator or people around him may collide with the bottom rail 103b and be injured, or the product itself may be damaged. It can be suppressed. That is, a product with higher safety than the conventional one is realized.

Further, the pleated screen 100 according to the first embodiment does not particularly brake the movement of the intermediate rail 103a, but the pleated screen 100 according to the third embodiment employs a moving pulley 761 for the gearbox 76a. By doing so, it functions as a friction mechanism, and frictional resistance is imparted to the first elevating cord CDa. Although this frictional force is smaller than the braking force of the braking device 1000, it still has the effect of suppressing the sudden drop of the intermediate rail 103a. In particular, it is preferable to have such a configuration because a sudden drop of the intermediate rail 104a may cause the user to feel glare during dimming using the dimming code 103a.

4. Conclusion As described above, according to the above-described embodiment, it is possible to provide a shielding device having two shielding materials and having higher safety.

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

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

2ta: Pulley placement hole 2tb: Pulley placement hole 2td: Pulley placement hole 2te: Pulley placement hole 2tf: Pulley placement hole 2tg: Pulley placement hole 2th: Pulley placement hole 3b: Bottom 3bc: Bottom 3bf: Bottom 3br: Bottom 3t: Canopy Part 4il: Left inner wall 4ir: Right inner wall 4l: Left side wall part 4r: Right side wall part 5b: Back part 5f: Front part 5r: Back part 5ra: Partition part 5rb: Partition part 6a: Opening 6b: Opening 6c: Opening 7l: Left side cord detour circuit 7r: Right side cord detour circuit 8al: Claw part 8ar: Claw part 8b: Mounting cylinder 8fl: Locking part 8fr: Locking part 8rl: Locking part 8rr: Locking part 10A: Case 13: Gear part 16 : 1st top wall groove 16A: 1st guide wall 17: 2nd top wall groove 17A: 2nd guide wall 31: Shaft core 40: Idle roller 41: Shaft core 42: Roller part 50: Pinion gear 70: Base 71: No. 1 Support member 71w: Wall 72: 2nd support member 73: 3rd support member 74: 4th support member 75: 5th support member 76a: Gear box 76b: Gear box 77a: Stopper 77b: Stopper 78: Friction mechanism 81 : Cord at the other end 82: Cord at the other end 83: Cord at the other end 84: Cord at the other end 85: Cord at the other end 86a: Cord at one end exit 86b: Cord at one end exit 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: Headbox 101al: Protrusion 101ar: Projection 102a : Upper screen 102b: Lower screen 102c: Fold 102p: Pleated piece 103a: Intermediate rail 103b: Bottom rail 104a: Dimming code 104b: Operation code 106: Pitch holding code 115: Inner peripheral gear 200: Attachment 200s: Internal space 220: Slider 221: One end port 222: One end port 240: Pulley 241: Washer 260: Carrier with internal teeth 261: Internal gear 280: Planetary gear 320: Weight holder with sun gear 323: Sun gear 340: Weight 702: Mounting cylinder 706: No. 1 base groove 707: 2nd base groove 761: moving pulley 762: gear Id groove 763: Guide pulley 780: Housing 781: Heart cam 782: Concavo-convex part 783: Holding part 784: Holding part 1000: Braking device CDa: First elevating code CDa2: First elevating code CDa2: First elevating code CDa3: No. 1 Lifting Code CDa4: 1st Lifting Code CDa5: 1st Lifting Code CDb: 2nd Lifting Code CDb1: 2nd Lifting Code CDb2: 2nd Lifting Code CDb3: 2nd Lifting Code CDb4: 2nd Lifting Code CDb5: 2nd Lifting Code Code SP: Coil spring

Claims (13)

The first and second cords are provided with 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 first and second cords. When the amount of withdrawal from the head box is changed, the upper shielding material opens and closes with the movement of the first cord, and the bottom rail moves up and down with the movement of the second cord.
A speed adjusting device is provided in the head box.
The second cord is composed of at least three cords, and these are hung in parallel in the longitudinal direction of the headbox.
The speed adjusting device is configured to apply a braking force only to the second cord as the second cord moves in one direction .
The speed adjusting device brakes the movement in one direction only with respect to the second cord hanging at both ends of the second cord.
Cloaking device. In the shielding device according to claim 1,
A first stopper is further provided in the head box.
By changing the withdrawal amount, the first stopper is configured to be able to select the state of holding the first or second cord or the release thereof.
Cloaking device. In the shielding device according to claim 1 or 2.
The speed adjusting device is
Gravity due to the bottom rail and the lower shield material, and gravity due to the intermediate rail and the upper shield material and the bottom rail and the lower shield material.
By any of the above, the braking force is configured to be applied so that the second cord moves at substantially the same speed.
Cloaking device. In the shielding device according to any one of claims 1 to 3.
The speed adjusting device includes a motion conversion unit and a resistance imparting unit.
The motion conversion unit is configured to convert the one-way movement of the second cord into the motion of the rotating member included in the resistance applying unit, and the rotating member generates the braking force.
Cloaking device. In the shielding device according to claim 4,
The resistance-imparting portion is a centrifugal governor.
In the centrifugal governor , a predetermined member rotates and moves to the outer diameter side by centrifugal force and comes into contact with another member to generate the braking force.
Cloaking device. In the shielding device according to any one of claims 1 to 5 .
A friction mechanism is provided in the head box.
The friction mechanism contacts only the first cord to generate friction.
Cloaking device. In the shielding device according to claim 6 ,
The frictional force due to the friction is smaller than the braking force of the speed adjusting device.
Cloaking device. In the shielding device according to claim 6 or 7 .
The friction mechanism uses a movable member.
When the first cord moves in one direction, the movable member moves, whereby at least the movable member comes into contact with the first cord to cause the friction.
Cloaking device. In the shielding device according to claim 8 ,
The movable member is a rotationally moving member having a concavo-convex portion at the tip and rotating the concavo-convex portion with the rear end as an axis.
When the first cord moves in one direction, the uneven portion rotates and moves in contact with the first cord to cause the friction.
Cloaking device. In the shielding device according to claim 9 ,
Further provided with a second stopper that holds the first cord and hinders movement.
The friction mechanism is arranged adjacent to the second stopper.
Cloaking device. In the shielding device according to claim 8 ,
The movable member uses a slide member that can slide along the guide groove.
When the first cord moves in one direction, the slide member slides, whereby the slide member and the opposing member located in the vicinity thereof sandwich the first cord and cause the friction.
Cloaking device. In the shielding device according to claim 11 ,
The slide member is a moving pulley, and the opposing member is a guide pulley.
Cloaking device. The shielding device according to any one of claims 1 to 12 .
Each of the second cords hangs down on the back side of the upper shield material and the lower shield material , so that each of the second cords cannot be visually recognized in the front view.
Cloaking device.

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