JP2020197121A - Shielding device - Google Patents

Abstract

To provide a shielding device capable of satisfactorily controlling.SOLUTION: Disclosed shielding device is a cord movement capturing device which cooperates with a braking device for braking the movement of a code which moves accompanying an automatic operation. The cord movement capturing device includes a pair of sandwiching members and a case. At least one sandwiching member is a roller. The case has a moving contact face (MN) which comes into contact with the outer periphery face of the roller. The pair of sandwiching members is sandwiched when braking the same.SELECTED DRAWING: Figure 1

Description

The present invention relates to a cloaking device and is particularly suitable when the movement of the cord can be appropriately decelerated.

Semi-automated shielding devices for lowering and lowering mechanisms such as horizontal blinds, pleated screens, honeycomb shades, roman shades, and roll-up screens have been put into practical use. It is provided with an elevating cord winding mechanism in the head box, and the rotation of the winding shaft is braked by a centrifugal governor or the like. When it is in the closed state, the slats and bottom rails, which are shielding members in the ascending position, are semi-automatically gravity-driven by releasing the stop by the stopper in the rewinding direction of the take-up shaft with an operation cord or the like. And lower the bottom rail. At this time, a mechanism is put into practical use in which a braking force is applied to the take-up shaft that moves with the descent of the slat and the bottom rail to reduce the downward momentum of the slat and the bottom rail. In horizontal blinds, pleated screens, honeycomb shades, roman shades, and roll-up screens, there is a type that raises and lowers by pulling the lifting cord directly by hand, but in this type, a mechanism that lowers while semi-automatically braking is practical. It has not been.

Patent Document 1 discloses a braking device (brake device) that suppresses the moving speed of the elevating cord when the movable pulley (sandwich body) approaches the fixed pulley.

Japanese Unexamined Patent Publication No. 10-140950

However, in the configuration described in Patent Document 1, the movable pulley does not move sufficiently and braking is insufficient.

Therefore, an object of the present invention is to provide a shielding device capable of sufficiently braking.

According to the present invention, it is a cord movement capturing device that cooperates with a braking device that brakes a cord that moves with the automatic operation of the shielding device.
The cord movement capture device includes a pair of sandwiches and a case.
At least one sandwich is a roller,
The case is provided with a moving contact surface (MN) that comes into contact with the outer peripheral surface of the roller, and the cord movement capturing device is provided, wherein the pair of sandwiching bodies are sandwiched during braking.

According to another aspect of the present invention, it is a cord movement capturing device that cooperates with a braking device that brakes a cord that moves with the automatic operation of the shielding device.
The cord movement capture device includes a pair of sandwiches and a case.
At least one sandwich is a roller,
The roller is provided with a rotatable outer cylinder on the outer circumference of the inner cylinder.
The inner cylinder is provided with a rotation mechanism whose axis is not the axis of the outer cylinder.
Provided is a cord movement capturing device characterized in that the pair of sandwiching bodies are sandwiched during braking by the operation of the rotation mechanism.

According to still another aspect of the present invention, it is a cord movement capturing device that cooperates with a braking device that brakes a cord that moves with the automatic operation of the shielding device.
The cord movement capture device includes a pair of interlocking bodies.
Provided is a cord movement capturing device comprising a plate, a string-like member, or a link mechanism that constantly contacts the sandwiched body with the cord, and activating the pair of sandwiched bodies so as to be sandwiched during braking. Will be done.

According to still another aspect of the present invention, it is a braking device that brakes a cord that moves with the automatic operation of the shielding device.
The braking device is provided with a cord movement capturing device.
The cord movement capture device includes a pair of interlocking bodies.
Provided is a braking device including a damper that generates a propulsive force in a direction in which the pair of sandwiching bodies are sandwiched during braking.

According to such a shielding device, a sufficient braking force can be obtained by friction between the outer periphery of the sandwiching body and the contact surface, as compared with the conventional configuration in which the movement is caused by the rotation of the central axis of the shaft.

It is a schematic view which looked at the horizontal blind which concerns on 1st Embodiment of this invention from the front. It is a schematic view which looked at the horizontal blind shown in FIG. 1 from the left side surface of FIG. It is the schematic which looked at the braking device 4000 which concerns on 1st Embodiment of this invention from the direction perpendicular to a cord. FIG. 5 is a schematic plan view showing a narrowed body when the braking device 4000 of FIG. 3 is cut along the line CC. (A) is an end view when the braking device 4000 of FIG. 3 is cut along the DD line, and (b) is a cross-sectional view when the braking device 4000 of the same figure is cut along the EE line. FIG. 3 is a schematic plan view showing a centrifugal brake 480 of the resistance applying portion RA of the braking device 4000 of FIG. It is explanatory drawing which shows the mode that the narrow body of the braking device 4000 of FIG. 3 brakes a cord CD, (a) is the state which sandwiched the code CD, and (b) is the code CD by the narrow body. Indicates a state in which the narrowing is released. It is explanatory drawing which shows the operation of the motion conversion part DT of the braking device 4000 of FIG. 3, (a) shows the state corresponding to FIG. 7 (a), (b) shows the state corresponding to FIG. 7 (b). Shown. It is a schematic diagram which shows the narrow-fitting body which concerns on the modification 1 of the braking device 4000 of FIG. 3, and shows the state corresponding to each state shown in FIG. It is a schematic diagram which shows the narrow-fitting body which concerns on the modification 2 of the braking device 4000 of FIG. 3, and shows the state corresponding to each state shown in FIG. 3 is a schematic view showing a narrowed body according to a modification 3 of the braking device 4000 of FIG. 3, where FIG. 3A shows a released state and FIG. 3B shows a pinched state. It is a perspective view of the braking device 5000 which concerns on 2nd Embodiment of this invention. It is a top view of the braking device 5000. It is a front view of the braking device 5000, (a) is a view which shows the pinched state, and (b) is a figure which shows the released state. FIG. 14 is a cross-sectional view taken along the line PP of FIG. It is a figure which shows the state of press-fitting the inner cylinder 42A into the outer cylinder 240A, (a) is before press-fitting, (b) is after press-fitting. It is a figure which shows the example which provides the elastic part 42Aa on the surface of the inner cylinder 42A. It is a figure which shows the example which provides the spring member 42Ab in the inner cylinder 42A. It is a figure which shows the braking device 5000 which concerns on the modification 1 of the 2nd Embodiment of this invention. It is a figure which shows the braking device 6000 which concerns on the modification 2 of the 2nd Embodiment of this invention, (a) is a figure which shows the pinched state, and (b) is a figure which shows the released state. FIG. 2 is a cross-sectional view taken along the line FF of FIG. It is a figure which shows the braking device 7000 which concerns on the modification 3 of the 2nd Embodiment of this invention, (a) is a front view, (b) is a right side view. It is explanatory drawing which shows the braking device 8000 which concerns on the modification 4 of the 2nd Embodiment of this invention, (a) is the state which sandwiched the cord CD, and (b) is the cord CD by the narrowed body. Indicates a state in which the narrowing is released. It is sectional drawing when the braking device 8000 of FIGS. 23A and 23B is cut along the JJ line of the figure, respectively. It is sectional drawing when the braking device 8000 of FIGS. 23A and 23B is cut along the KK line of the figure. It is a figure which shows the member used for the motion conversion part which concerns on 3rd Embodiment of this invention, (a) shows the state that the knurl 240 and the roller part 42 are connected by the plate 800, and (b) is a string-shaped member. It shows how the knurl 240 and the roller portion 42 are connected by the 900. FIG. 26B is a schematic view of a state in which the member of FIG. 26B sandwiches the cord CD as viewed from the direction of arrow Z. It is a figure which shows the mode that the code CD is braked by the motion conversion part which concerns on 3rd Embodiment of this invention, (a) is a figure which shows the free movement state, (b) is a figure which shows the pinched state. It is a figure which shows the mode that the code CD is braked by another motion conversion part which concerns on 4th Embodiment of this invention, (a) is a figure which shows the free movement state, (b) is a figure which shows the pinched state. It is a figure which shows the mode that the code CD is braked by another motion conversion part which concerns on 5th Embodiment of this invention.

It is a perspective view which shows the outline of the braking device 5000 which concerns on 6th Embodiment of this invention. It is a figure which shows the state which the braking device 5000 of FIG. 31 brakes a cord CD, (a) is a state which sandwiched a cord CD by a sandwiching body, (b) is a state which the narrowing of a cord CD by a narrowing body is released. Indicates the state of being done. It is a figure which shows the modification of the braking device of FIG. 31, (b) shows the state which sandwiched the cord CD by the sandwiching body, (a) shows the state which the narrowing of the cord CD by a narrowing body is released. .. It is a figure which shows the member used for the motion conversion part DT of the braking device 6000 which concerns on 7th Embodiment of this invention, (a) shows the state that the knurl 240 and the roller part 42 are connected by the plate 800, (b). ) Indicates a state in which the knurl 240 and the roller portion 42 are connected by the string-shaped member 900. It is a figure which shows the mode that the code CD is braked by the motion conversion part DT of FIG. 34, (a) is a figure which shows the free movement state, (b) is a figure which shows the pinched state. It is explanatory drawing which shows the modification of the braking device 6000 of FIG. 34, (a) is the state which the narrowing of the cord CD by a narrow body is released, (b) is the state which the sandwiched body sandwiches the code CD. Is shown. It is a schematic perspective view which shows the narrow body and the link mechanism 720 of the braking device 7000 which concerns on 8th Embodiment of this invention. It is a figure which shows the mode that the braking device 7000 of FIG. 37 brakes a cord CD, (a) is a state which sandwiched the cord CD by the sandwiching body, (b) is the narrowing of the cord CD by the narrowing body is released. Indicates the state of being done. It is a top view which shows the braking device 8000 which concerns on the 9th Embodiment of this invention, (a) is the state which the narrowing of the cord CD by a narrowing body is released, (b) is the state where the sandwiching body sandwiches a cord CD. Indicates the state of wearing. It is a side view which shows the mode that the braking device 8000 of FIG. 39 brakes a cord CD, (a) is a state in which narrowing of a cord CD by a narrow body is released, and (b) is a state where a sandwich body holds a code CD. Indicates a pinched state.

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

(First Embodiment)
<Explanation of configuration>
(1) Overall Configuration of Horizontal Blind The horizontal blind according to the first embodiment is an example of the shielding device according to the first aspect described above. As shown in FIGS. 1 and 2, in the horizontal blind according to the first embodiment, a plurality of stages of slats 3 are suspended and supported from the head box 1 via a plurality of rudder cords 2, and the rudder cord 2 is supported. A bottom rail 4 is suspended and supported at the lower end. The multi-stage slat 3 and bottom rail 4 function as a solar radiation shielding material.

As shown in FIGS. 1 and 2, a plurality of guide pulleys 24 (three in the present embodiment) are arranged in the head box 1 in the vicinity of each ladder code 2. The guide pulley 24 is configured to be rotatable in a guide pulley case (not shown). The ladder cord 2 is inserted into the head box 1 through an insertion hole provided on the bottom surface of the head box 1. The upper end thereof is attached to a drum (not shown), and the angle adjusting shaft 7 is fitted in the center of the drum.

Therefore, when the angle adjusting shaft 7 is rotated, the drum is rotated, and one of the ladder cords 2 is pulled up with the rotation of the drum, so that the angles of the slats 3 are adjusted in the same phase.

An operation rod 8 is suspended and supported at one end of the head box 1. When the operation rod 8 is rotated, the angle adjusting shaft 7 is rotated via a gear box (not shown) arranged in the head box 1. Therefore, the angle of each slat 3 can be adjusted by rotating the operation rod 8.

A plurality of (three in this embodiment) lifting cords 10 (an example of a "cord" in the claims) are inserted into the slats 3, and one end of the lifting cords 10 is attached to the bottom rail 4. That is, each guide pulley 24 is arranged corresponding to each elevating cord 10.

As shown in FIG. 1, the other ends of the three elevating cords 10 are arranged at one end of the head box 1 via the guide pulleys 24 arranged in the longitudinal direction of the head box 1 and the braking device 4000. The vehicle is guided by a self-weight drop prevention device (not shown).

Each elevating cord 10 is inserted into the operating rod 8 from its own weight descent prevention device via a gear box, and its tip is connected to a cord equalizer 8b provided below the operating portion 8a. Therefore, when the cord equalizer 8b is pulled downward and the elevating cord 10 is pulled out from the head box 1, the bottom rail 4 is pulled up and the slats 3 are pulled up.

Then, if the pull-out operation of the elevating cord 10 is stopped and the elevating cord 10 is released, the self-weight drop prevention device is activated to prevent the self-weight drop of the slat 3 and the bottom rail 4. Further, when the elevating cord 10 is slightly pulled downward from the state where the self-weight descent prevention device is operating, the operation of the self-weight descent prevention device is released, and the slats 3 and the bottom rail 4 can be lowered by their own weight. .. As the self-weight drop prevention device, for example, a known self-weight drop prevention device disclosed in Japanese Patent Application Laid-Open No. 2001-173343 may be used. That is, the slats 3 and the bottom rail 4, which are shielding materials, can be raised and lowered by pulling the lifting cord 10.

(2) Description of Braking Device The braking device 4000 will be described with reference to FIGS. 3 to 8. As shown in FIG. 3, the braking device 4000 of the present embodiment has a configuration in which the motion conversion unit DT and the resistance applying unit RA are connected by a shaft core 31. The outline of this embodiment will be described below.

First, regarding the motion conversion unit DT, as shown in FIGS. 3, 4 and 5 (b), a pair of sandwiching members of the sandwiching body are formed on the tension transmission roller 30 and the fixing member 440. It is composed of an inclined portion 441. That is, in the present embodiment, only one of the sandwiching members is movable. Further, as shown in FIGS. 3 and 5, the rotation of the tension transmission roller 30 is sequentially transmitted to the speed increasing gear 462 and the worm gear 470 including the spur gear 450, the small gear 460 and the large gear 461 via the shaft core 31. To. Then, the rotation of the worm gear 470 is transmitted to the centrifugal brake 480 as the resistance applying portion RA, so that a braking force is applied to the tension transmission roller 30. The spur gear 450, the speed-up gear 462, the worm gear 470, and the centrifugal brake 480 are covered with a housing 490 having an internal space S at a position adjacent to the fixing member 440. The front direction of the paper in FIG. 3, the downward direction in FIG. 4, and the left direction in FIGS. 5A and 5B correspond to the front direction of the above-described embodiment.

In the present embodiment, as shown in FIGS. 3 and 5B, the fixing member 440 is a substantially rectangular parallelepiped member, and is fixed to, for example, a head box of a shielding device. An inclined portion 441 is formed on the upper portion of the fixing member 440 as shown in FIG. 5 (b). Then, as shown in FIG. 3, the upper surface of the inclined portion 441 is formed with three grooves 442a to 442c extending in the extending direction of the cord CD in order to position the three cord CDs.

On the other hand, as shown in FIG. 3, the tension transmission roller 30 includes a shaft core 31 and a knurl 240, and is held by a slider 420 as a holding member via the shaft core 31.

The slider 420 has a substantially U-shape provided with a pair of parallel plate-shaped support portions 421 and a rear wall 423 connecting them rearward (see FIG. 4), and an inclined portion 441 is provided on the upper surface 440a of the fixing member 440. It is arranged so as to straddle it, and can be translated along the upper surface 440a of the fixing member 440 in the extending direction of the cord CD. That is, in the present embodiment, the upper surface 440a of the fixing member 440 functions as a guide portion for guiding the slider 420. Each of the pair of plate-shaped support portions 421 is formed with through holes 422 that rotatably hold the shaft core 31. Further, as shown in FIG. 5B, between the holding groove 423a formed on the rear wall 423 of the slider 420 and the wall portion 443 fixed at the rear position of the fixing member 440, as an urging member. A coil spring SP is arranged, and the slider 420 is urged toward the front (downward in FIG. 4 and left in FIG. 5 (b)).

Further, as shown in FIGS. 3 and 5B, the slider 420 is positioned on the upper side by the top wall 444 formed above the fixing member 440, and the top wall 444 is downwardly restricted. By projecting and engaging with the rear wall 423 of the slider 420, a protrusion 445 is formed to prevent the slider 420 from coming out forward. Further, the protrusion 445 is always in contact with the tension transmission roller 30 to regulate the upward displacement of the tension transmission roller 30. Further, when the tension transmission roller 30 moves while being in contact with the protrusion (moving contact surface) 445, a resistance force is generated due to the friction between the tension transmission roller 30 and the protrusion 445. Since the outer circumference of the tension transmission roller 30 has a large diameter, the slider 420 can be reliably moved. Further, it is ensured by surface contact with the knurl 240. Further, as shown in FIG. 5B, an opening 444a is formed in the top wall 444, and the rear wall 423 of the slider 420 projects upward from the rear wall 423 at a position corresponding to the opening 444a. With the protrusion 423b formed and the slider 420 housed in the storage space SS formed by the fixing member 440, the wall part 443, and the top wall 444, the slider 420 is operated from the outside to transmit the tension of the cord CD. An operation such as passing between the roller 30 and the inclined portion 441 can be performed.

Next, as shown in FIGS. 3 and 5A, a spur gear 450 is attached to a shaft core 31 that rotates with the rotation of the tension transmission roller 30. The shaft core 31 is arranged so as to penetrate the elongated hole-shaped communication hole 491a (see FIGS. 4 and 8) formed in the wall surface 491 on the fixing member 440 side of the housing 490, and the tension transmission roller 30 and the shaft core 31. The spur gear 450 is movable in the front-rear direction as the slider 420 moves in the front-rear direction within the range of the communication hole 491a (see FIGS. 4 and 8) (see FIG. 8). The gear teeth 450a of the spur gear 450 can mesh with the gear teeth 460a of the small gear 460 of the speed increasing gear 462 having a diameter smaller than this. Further, the small gear 460 and the large gear 461 have a rotating shaft 463 rotatably supported by support holes 494 and 494 formed in the wall surface 491 on the fixing member 440 side of the housing 490 and the wall surface 492 facing the wall surface 491, respectively. It is configured to rotate integrally in the center. The large gear 461 has substantially the same diameter as the spur gear 450, and is arranged so as to always mesh with the worm gear 470.

The worm gear 470 is configured to convert the rotation of the large gear 461 of the speed-increasing gear 462 about the left-right direction (the left-right direction in FIG. 3) into the rotation about the up-down direction and transmit it to the central axis 471. One end of the central shaft 471 is rotatably supported by the lower support portion 495 of the housing 490, and the other end of the central shaft 471 is rotatably supported by the upper support portion 482 of the cylindrical case 481 of the centrifugal brake 480. Further, as shown in FIG. 6, a rotating body 483 of the centrifugal brake 480 is attached to the central shaft 471 so as to be relatively non-rotatable in the cylindrical case 481.

As shown in FIG. 6, the centrifugal brake 480 includes a rotating body 483 in the cylindrical case 481. The rotating body 483 includes a central portion 484 fixed to the central shaft 471, a pair of arm portions 485 extending radially outward from the central portion, and an elastic deformed portion 486 extending in the circumferential direction from the edge portion of the arm portion 485. The centrifugal enlarged diameter portion 487 is provided, and is rotated with the rotation of the central shaft 471. When the rotation of the central shaft 471 is slow, the centrifugal brake 480 has a gap 488 between the centrifugal enlarged diameter portion 487 and the cylindrical case 481, so that the braking torque applied to the central shaft 471 is small, and the central shaft 471 When the rotation speed is increased, the centrifugal force applied to the centrifugal enlarged diameter portion 487 becomes large, the elastically deformed portion 486 is deformed, and the outer peripheral surface 487a of the centrifugal enlarged diameter portion 487 rubs against the inner peripheral surface 481a of the cylindrical case 481. As a result, the braking torque generated is increased. The magnitude of the braking torque can be adjusted by changing the elastic force of the elastically deformed portion 486 and the size of the gap 488.

With the above configuration, in a state where tension is not applied to the cord CD as shown in FIG. 7A (steady state), the knurl 240 tilts the cord CD by the coil spring SP via the slider 420. It is urged to approach the grooves 442a to 442c of. As a result, the tension transmission roller 30 (knurled 240) and the grooves 442a to 442c of the inclined portion 441 are in a state of narrowly adhering the cord CD, and as shown in FIG. 8A, the spur gear 450 is the speed increasing gear 462. In mesh with the small gear 460 of the above, the rotation of the tension transmission roller 30 can be transmitted to the resistance applying portion RA (centrifugal brake 480) (output state). When the cord CD moves forward (to the left in FIG. 7) in this state, the movement of the cord CD is transmitted to the knurl 240, and the resistance imparting portion RA imparts resistance to the cord CD.

On the other hand, when the cord CD moves backward (to the right in FIG. 7), as shown in FIG. 7 (b), the tension transmission roller 30 (knurl 240) rotates with the cord CD as the cord CD moves. It moves in the same direction, whereby the slider 420 also moves rearward via the shaft core 31 against the urging force of the coil spring SP. Then, as shown in FIG. 8B, the spur gear 450 does not mesh with the small gear 460 of the speed increasing gear 462, and the rotation of the tension transmission roller 30 cannot be transmitted to the resistance applying portion RA (centrifugal brake 480) ( (Release state). Further, since the inclined portion 441 is inclined downward toward the rear, the distance between the tension transmission roller 30 and the grooves 442a to 442c of the inclined portion 441 of the fixing member 440 is widened, and the narrowing of the cord CD is weakened. The resistance is not applied to the cord CD of the resistance applying portion via the tension transmission roller 30. In this way, when the cord CD is moved in the other end direction, resistance is applied to the cord CD due to the two configurations of the configuration in which the gears are not meshed and the configuration in which the narrowing of the cord CD due to the narrowed body is weakened. Instead, the code CD can be easily moved.

Based on the above, the braking device 4000 according to the present embodiment has a one-way function in which the sandwiching body (tension transmission roller 30 (knurl 240) and grooves 442a to 442c of the inclined portion 441) transmits rotation in only one direction. become.

That is, the braking device 4000 according to the present embodiment realizes the one-way function by changing the frictional force acting between the sandwiching body and the cord CD by the displacement of the sandwiching body. Specifically, in the braking device 4000, the frictional force acting between the tension transmission roller 30 and the cord CD when the tension transmission roller 30 is located at the position (second position) in the released state is the tension transmission roller 30. The tension transmission roller 30 moves so as to be smaller than the frictional force acting between the tension transmission roller 30 and the cord CD when is positioned at the position (first position) in the output state.

Further, the braking device 4000 according to the present embodiment switches whether or not to transmit the rotation caused by the movement of the cord to the resistance applying portion depending on the displacement of the sandwiching body. Specifically, the braking device 4000 outputs the rotation of the tension transmission roller 30 due to the movement of the cord CD to the resistance applying portion RA when the tension transmission roller 30 is located at the first position, and the tension transmission roller 30 causes the tension transmission roller 30 to output. It is configured so that the rotation of the tension transmission roller 30 due to the movement of the cord CD when located at the second position is not output to the resistance applying portion RA.

Further, the braking device 4000 according to the present embodiment includes a sandwiching body (tension transmission roller 30 (knurled 240)) that captures the movement of the cord CD and transmits the rotation caused by the movement of the cord CD to the resistance applying portion RA. , A case (slider 420) containing the sandwiched body, and the like.

<Modification 1 of the first embodiment>
Regarding the configuration of the narrowed body, instead of forming the sandwiching member facing the tension transmission roller 30 by the inclined portion 441, as shown in FIG. 9, the fixed member 440 can rotate instead of the inclined portion 441. It is also possible to use a fixed roller 446 fixed to. Also in this case, in the narrowed state shown in FIG. 9A, the cord CD is narrowed and the gears are also engaged. Therefore, the resistance applying portion RA against the movement of the cord CD forward (to the left). Rotation is transmitted to and braking force is applied to the cord. On the other hand, when the cord CD is moved backward, as shown in FIG. 9B, the slider 420 is moved backward, so that the distance between the tension transmission roller 30 and the fixed roller 446 is widened and the narrowing force is increased. At the same time, as shown in FIG. 8B, the gears are disengaged and the rotation of the tension transmission roller 30 cannot be transmitted to the resistance applying portion RA. Therefore, in this case as well, it can be said that the two configurations are provided, that is, a configuration in which the gears are not meshed and a configuration in which the narrowing of the cord CD due to the narrowed body is weakened.

That is, the braking device 4000 according to the first modification of the first embodiment realizes the one-way function by changing the frictional force acting between the sandwiching body and the cord CD by the displacement of the sandwiching body. Specifically, in the braking device 4000 according to the first modification of the first embodiment, when the tension transmission roller 30 is located at the position (second position) in the released state, it is between the tension transmission roller 30 and the cord CD. The tension transmission roller 30 acts so that the frictional force acting is smaller than the frictional force acting between the tension transmission roller 30 and the cord CD when the tension transmission roller 30 is located at the position (first position) in the output state. Moves.

Further, in the braking device 4000 according to the first modification of the first embodiment, whether or not the rotation caused by the movement of the cord is transmitted to the resistance applying portion is switched depending on the displacement of the sandwiching body. Specifically, the braking device 4000 according to the first modification of the first embodiment resists the rotation of the tension transmission roller 30 due to the movement of the cord CD when the tension transmission roller 30 is located at the first position. It is configured to output to RA so that the rotation of the tension transmission roller 30 due to the movement of the cord CD is not output to the resistance applying portion RA when the tension transmission roller 30 is located at the second position.

<Modification 2 of the first embodiment>
Further, as a sandwiching member facing the tension transmission roller 30, as shown in FIG. 10, a belt 449 wound around two rollers 447 and 448 having the same shape horizontally provided in the front-rear direction can also be used. Is. In the case of this form, unlike the above example, even if the steady state as shown in FIG. 10A or the state where the code CD is pulled forward and the slider 420 is in front, FIG. 10B shows. Even when the cord CD as shown is pulled backward and the slider 420 is rearward, the distance between the tension transmission roller 30 and the belt 449 (distance between the pair of narrowing members) is the same and narrow. The structure is such that the narrowing force due to the body does not change. In the case of this form, as shown in FIG. 8B, the rotation of the tension transmission roller 30 cannot be transmitted to the resistance applying portion RA due to the disengagement of the gears.

That is, the braking device 4000 according to the second modification of the first embodiment outputs the rotation of the tension transmission roller 30 due to the movement of the cord CD to the resistance applying portion RA when the tension transmission roller 30 is located at the first position. However, when the tension transmission roller 30 is located at the second position, the rotation of the tension transmission roller 30 due to the movement of the cord CD is not output to the resistance applying portion RA.

From the above, according to the first aspect, the braking device 4000 according to the first embodiment is a shield provided with a sandwiching body that captures the movement of the cord and transmits the rotation caused by the movement of the cord to the resistance applying portion. In the device, the resistance applying portion generates a resistance force against the movement of the cord, and the sandwiching body can be regarded as a shielding device having a one-way function of transmitting rotation in only one direction.

Further, according to the second aspect, the braking device 4000 according to the first embodiment has a sandwiching body that captures the movement of the cord and transmits the rotation caused by the movement of the cord to the resistance applying portion, and the sandwiching body. It can be regarded as a shielding device having a case containing a body and a case. Here, in the first embodiment, the slider 420 corresponds to the case.
<Action / effect>
With the braking device 4000 according to the first embodiment, the following actions and effects can be obtained.
(1) Since the sandwiching body that captures the movement of the cord and transmits the rotation caused by the movement of the cord to the resistance applying portion RA has a one-way function, as compared with the conventional configuration in which the one-way clutch is separately provided. The number of parts can be reduced and the volume of the device can be reduced.
(2) Preventing foreign matter such as dust from entering the case (slider 420) by a configuration having a sandwiching body that captures the movement of the code CD and a case (slider 420) that includes the sandwiching body. Can be done. Therefore, it is possible to prevent foreign matter from adhering to the code CD and prevent performance deterioration.

<Modification 3 of the first embodiment>
Next, a modification 3 of the first embodiment will be described with reference to FIG. In the present embodiment, the slider 41K is movably supported in the AB direction on the case 10K (guided on both sides), and the inner cylinder 42A is movably supported on the slider 41K in the CD direction (the inner cylinder moving surface is supported by the slider hole 410K). Guide). The fixed shaft 31K fixed to the case 10K is passed through the inner cylinder 42A, and the fixed shaft 31K is relatively movable along the inner cylinder slope 42K provided on the inner cylinder 42A. Further, the convex portion 43K provided on the inner cylinder 42A passes through the slider hole 410K and comes into contact with the case 10K. In addition, a catch section / transmission section communication hole 420K is provided. When the code CD moves in the A direction, the inner cylinder 42A moves in the A direction together with the slider 41K via the outer cylinder 240A (FIG. 11 (b). On the other hand, the fixed shaft 31K does not move. Therefore, it hits the fixed shaft 31K. Guided by the contacting inner cylinder slope 42K, the pair of inner cylinders 42A move in a direction approaching each other together with the outer cylinder 240A, and the pair of outer cylinders 240A sandwich the cord CD. After that, as the cord CD moves. The outer cylinder 240A rotates relative to the inner cylinder 42A. The outer cylinder 240A is provided with a movement transmission tooth portion 430K, and the rotation of the outer cylinder 240A is carried out via the movement transmission tooth portion 430K. Resistance to the movement of the cord CD is added by transmitting the rotation (not shown).
Further, when the code CD moves in the B direction, the inner cylinder 42A moves in the B direction together with the slider 41K via the outer cylinder 240A. At this time, guided by the inner cylinder slope 42K in contact with the fixed shaft 31K, the pair of inner cylinders 42A move in the direction away from each other together with the outer cylinder 240A, so that the force of the pair of outer cylinders 240A to sandwich the cord CD. Becomes weaker, and as the code CD moves, the outer cylinder 240A does not work.
The fixed shaft 31K does not have to be cylindrical as long as the movement of the inner cylinder 42A can be controlled along the inner cylinder slope 42K, and may have a shorter length as long as it is in contact with the inner cylinder slope 42K. The inner cylinder slope 42K may have a bottomed groove shape instead of a hole shape as long as it can guide the movement of the fixed shaft 31K.
<Action / effect>
With the braking device 4000 according to the first embodiment, the following actions and effects can be obtained.
(1) Since the sandwiching body that captures the movement of the cord and transmits the rotation caused by the movement of the cord to the resistance applying portion RA has a one-way function, as compared with the conventional configuration in which the one-way clutch is separately provided. The number of parts can be reduced and the volume of the device can be reduced.
(2) Preventing foreign matter such as dust from entering the case (slider 420) by a configuration having a sandwiching body that captures the movement of the code CD and a case (slider 420) that includes the sandwiching body. Can be done. Therefore, it is possible to prevent foreign matter from adhering to the code CD and prevent performance deterioration.

2. 2. Second Embodiment Next, the braking device 5000 according to the second embodiment will be described with reference to FIGS. 12 to 18. As shown in FIG. 12 and the like, the braking device 5000 according to the present embodiment has a configuration in which the motion conversion unit DT and the resistance applying unit RA are arranged in parallel. The outline of this embodiment will be described below.

As shown in FIGS. 12 to 14, the motion conversion unit DT is composed of a catch roller 32A composed of an inner cylinder 42A and an outer cylinder 240A, and a so-called fixed pulley knurl 240 rotatably attached to the shaft core 31. It is composed of a catch roller 32B. Further, both the catch rollers 32A and 32B are provided in the case 440A. The cord CD is sandwiched by the rotational torque of the catch rollers 32A and 32B. Further, the cord CD is inserted into the motion conversion unit DT via the cord insertion hole 14A. The catch roller 32A will be described in more detail later.

The resistance applying portion RA is a so-called centrifugal governor, and when the weight 340A revolves around the damper shaft shown in FIG. 13 and the weight 340A moves to the outer diameter side due to centrifugal force, this and the case 10Aa come into contact with each other and rub against each other. Occurs to generate braking force. A rotation transmission mechanism (not shown) that rotates the weight 340A and a shaft core 31 of the catch roller 32B are connected, and when the catch roller 32B rotates, power related to such rotation applies resistance via the rotation transmission mechanism. It is transmitted to the part RA, which causes the weight 340A to revolve around the damper shaft. The number of weights 340A is not limited, and may be, for example, 2, 4, 8, or 16.

The catch roller 32A is configured such that the inner cylinder 42A and the outer cylinder 240A can rotate relative to each other and have sliding resistance during such relative rotation. As shown in FIG. 15, the outer circumference of the inner cylinder 42A is wrapped with the outer cylinder 240A. This will be described in detail later. A rotating shaft 31B and a guide shaft 31C are provided on the side surface of the inner cylinder 42A, and the case 440A is provided with a bearing of the rotating shaft 31B and a guide groove 31Ca for guiding the movement of the guide shaft 31C. That is, the catch roller 32A is configured to be rotatable around the rotation shaft 31B. The guide groove 31Ca is provided so that one side brings the catch roller 32A and the cord CD close to each other and the other side keeps the catch roller 32A and the cord CD away from each other. In other words, the guide groove 31Ca is formed so that the catch roller 32A moves away from the cord CD from one side to the other.

According to such a structure in the guide groove 31Ca, when the cord CD moves in the braking direction indicated by the arrow in FIG. 14, the catch roller 32A rotates about the rotation shaft 31B, and the guide shaft 31C guides accordingly. It moves along the groove 31Ca. Then, the rotation of the catch roller 32A is restricted at the position (first position) where the guide shaft 31C is located on one side of the guide groove 31Ca shown in FIG. 14A. In such a state, when the cord CD is sandwiched between the catch rollers 32A and 32B and the cord CD further moves in the braking direction, the outer cylinder 240A in the catch roller 32A rotates with respect to the inner cylinder 42A, and the catch roller 32B has a shaft core. It rotates around 31. That is, the resistance force is applied by the resistance applying portion RA connected to the catch roller 32B, and the movement of the cord CD is braked.

Further, according to such a structure in the guide groove 31Ca, when the cord CD moves in the release direction indicated by the arrow in FIG. 14, the catch roller 32A rotates around the rotation shaft 31B, and the guide shaft 31C is accompanied by this. Moves along the guide groove 31Ca. Then, the rotation of the catch roller 32A is restricted at the position (second position) where the guide shaft 31C is located on the other side of the guide groove 31Ca shown in FIG. 14B. In such a state, the cord CD is not sandwiched between the catch rollers 32A and 32B or is merely sandwiched by a relatively weak force, and even if the cord CD further moves in the release direction, the catch roller 32B is pressed. The catch roller 32B does not rotate due to insufficient torque to rotate it. Therefore, the resistance force by the resistance imparting portion RA is not imparted.

In summary, in the process of changing from the state of FIG. 14 (a) to the state of FIG. 14 (b), the resistance force by the resistance imparting unit RA is given to the code CD, but in the state of FIG. 14 (b), the resistance is applied. The granting part RA does not work. Then, in the state of FIG. 14B, the distance between the outer cylinder 240A and the knurl 240 is larger than that in the state of FIG. 14A, so that the pinching force with respect to the cord CD is weakened. As a result, the braking force applied to the code CD is released, so that the code CD can move freely. Further, in the process of changing from the state of FIG. 14 (b) to the state of FIG. 14 (a), the resistance force by the resistance imparting portion RA is applied to the cord CD, and the cord CD is sandwiched in the state of FIG. 14 (a). The resistance-imparting portion RA acts as it is worn.

The sliding resistance of the inner cylinder 42A and the outer cylinder 240A during relative rotation may be such that the guide shaft 31C cannot rotate relative to the first position. In view of this, the inner cylinder 42A and the outer cylinder 240A in the catch roller 32A can be configured as follows.

In one example, the catch roller 32A shown in FIG. 16B is realized by the press-fitting step of the inner cylinder 42A into the outer cylinder 240A as shown in FIG. 16A. In another example, as shown in FIG. 17, an elastic portion 42Aa is provided on the surface of the inner cylinder 42A, whereby a desired resistance force can be obtained. In yet another example, as shown in FIG. 18, the inner cylinder 42A is provided with a spring member 42Ab that applies pressure to the outer cylinder 240A, whereby a desired resistance force can be obtained. Further, it may be lubricated with highly viscous grease to stabilize the resistance.

<Modification 1 of the second embodiment>
Further, as shown in FIG. 19, the fixing portion 441A and the guide shaft 31C provided on the case 10Aa are provided so that the guide shaft 31C is located at the first position except when the cord CD is moved in the release direction. A torsion spring 31Cb as a urging means in which the coil portion is wound around the rotating shaft 31B may be arranged between them, and the guide shaft 31C may be urged by the torsion spring 31Cb.

From the above, according to the first aspect, the braking device 5000 according to the second embodiment has a one-way function in which the catch roller 32A transmits rotation in only one direction.

That is, the braking device 5000 according to the present embodiment realizes the one-way function by changing the frictional force acting between the sandwiching body and the cord CD by the displacement of the sandwiching body. Specifically, in the braking device 5000, the frictional force acting between the catch roller 32A and the cord CD when the catch roller 32A is located at the released state (second position) is sandwiched by the catch roller 32A. The catch roller 32A moves so as to be smaller than the frictional force acting between the catch roller 32A and the cord CD when it is located at the position (first position) in the state.

Further, the braking device 5000 according to the present embodiment is configured so that whether or not the rotation caused by the movement of the cord CD is transmitted to the resistance applying portion RA is switched depending on the displacement of the sandwiching body. Specifically, when the catch roller 32A is located at the position (first position) in the pinched state, the rotation of the shaft core 31 of the catch roller 32B is transmitted to the resistance applying portion RA, and the catch roller 32A is in the released state. When positioned at the position (second position), the rotation of the shaft core 31 of the catch roller 32B is not transmitted to the resistance applying portion RA.

<Modification 2 of the second embodiment>
Next, the braking device 6000 according to the second modification of the second embodiment will be described with reference to FIGS. 20 and 21. As shown in FIGS. 20 and 21, the braking device 6000 according to this modification has a configuration in which the motion conversion unit DT and the resistance applying unit RA are arranged in parallel in the left-right direction (direction perpendicular to the paper surface). .. The outline of this modification will be described below.

As shown in FIG. 20, the motion conversion unit DT includes a catch roller 32A composed of an inner cylinder 42A and an outer cylinder 240A, and a catch roller 32B composed of a knurl 240 rotatably attached to the shaft core 31. The inner cylinder 42A and the outer cylinder 240A have the same configurations as those in FIGS. 12 and 14, and are configured to be rotatable relative to each other. Further, a rotating shaft 31B and a guide shaft 31C are provided on the side surface of the inner cylinder 42A. Also in this modification, the catch roller 32A is configured to be rotatable around the rotation shaft 31B. Further, the guide groove 31Ca is provided on the side surface of the case 440B at a position where the catch roller 32B can change the state of sandwiching the cord CD and releasing the cord CD. Here, in this modification, the sandwiched body is formed by the catch roller 32A and the catch roller 32B.

Then, in this modification, the pinion gear 50B is provided on the side surface of the outer cylinder 240A. The pinion gear 50B has a rotation axis in the direction perpendicular to the paper surface. Then, it is formed so as to mesh with the inner teeth of the transmission gear 261B provided in the resistance applying portion RA. Further, the speed increasing gear 280B is provided at a position where it meshes with the outer teeth of the transmission gear 261B. The speed-increasing gear 280B is rotatably attached to the support shaft 263B. Then, as shown in FIG. 20B, a weight holder 320B that rotates integrally with the speed-increasing gear 280B is provided coaxially with the speed-increasing gear 280B. Then, the weight 340B is held by the weight holder 320B. Here, in the present embodiment, the weight holder 320B holds four weights 340B.

Since the weight holder 320B is provided so as to rotate integrally with the speed increasing gear 280B, the weight holder 320B also rotates as the speed increasing gear 280B rotates. As a result, the weight 340B held by the weight holder 320B revolves.

As shown in FIG. 21, in this modification, three cord CDs are sandwiched horizontally. These cord CDs are inserted into the cord insertion holes 14A constituting the motion conversion unit DT. Further, the pinion gear 50B protrudes to the outside from the case 440B of the motion conversion unit DT, and meshes with the transmission gear 261B of the resistance applying unit RA arranged adjacent to the motion conversion unit DT.

Therefore, when tension is applied to the cord CD in the braking direction, the catch roller 32A rotates clockwise around the rotation shaft 31B due to the frictional force generated between the outer cylinder 240A and the cord CD. At this time, as the catch roller 32A rotates, the pinion gear 50B provided on the outer cylinder 240A also rotates clockwise while rotating. Then, the transmission gear 261B that meshes with the pinion gear 50B starts rotating counterclockwise. As a result, the speed-increasing gear 280B that meshes with the transmission gear 261B starts rotating clockwise. At this time, since the diameter of the speed increasing gear 280B is smaller than the diameter of the transmission gear 261B, the rotation of the pinion gear 50B due to the movement of the code CD is accelerated and transmitted to the speed increasing gear 280B. At this time, the inner cylinder 42A and the outer cylinder 240A rotate integrally due to the sliding resistance of both.

Then, due to the rotation of the speed-increasing gear 280B, the weight 340B starts to revolve clockwise. Then, when the weight 340B comes into contact with the inner wall of the case 10Aa of the resistance applying portion RA, it becomes possible to apply a braking force against the movement of the cord CD. Then, in the state of FIG. 20A, the guide shaft 31C and the guide groove 31Ca come into contact with each other to prevent the inner cylinder 42A from rotating. Then, when tension is further applied to the cord CD in the braking direction, the outer cylinder 240A starts to rotate relative to the inner cylinder 42A. As a result, the braking force from the resistance applying portion RA can be applied while sandwiching the cord CD.

On the other hand, when tension is applied to the release of the cord CD, the catch roller 32A rotates counterclockwise around the rotation shaft 31B. At this time, the pinion gear 50B, the transmission gear 261B, and the speed increasing gear 280B rotate in the opposite direction to the case where tension is applied to the braking of the cord CD. Then, in the state of FIG. 20B, the guide shaft 31C and the guide groove 31Ca come into contact with each other, so that the rotation of the inner cylinder 42A is prevented. Then, the outer cylinder 240A continues to rotate relative to the inner cylinder 42A. In such a state, the distance between the outer cylinder 240A and the knurl 240 is larger than that in FIG. 20A, and the cord CD cannot be sufficiently sandwiched. In addition, since the cord CD cannot be sufficiently sandwiched, the rotation of the outer cylinder 240A is also suppressed. As a result, the rotation caused by the movement of the code CD is not transmitted to the resistance applying portion RA.

From the above, according to the first aspect, the braking device 6000 according to the second modification of the second embodiment has a one-way function in which the catch roller 32A transmits rotation in only one direction.

That is, the braking device 6000 according to the present modification realizes the one-way function by changing the frictional force acting between the sandwiching body and the cord CD by the displacement of the sandwiching body. Specifically, in the braking device 6000, the frictional force acting between the catch roller 32A and the cord CD when the catch roller 32A is located at the released state (second position) is sandwiched by the catch roller 32A. The catch roller 32A moves so as to be smaller than the frictional force acting between the catch roller 32A and the cord CD when it is located at the position (first position) in the state.

Further, the braking device 6000 according to the present modification is configured to switch whether or not to transmit the rotation caused by the movement of the cord CD to the resistance applying portion RA depending on the displacement of the sandwiching body. Specifically, when the catch roller 32A is located at the position in the pinched state (first position), the rotation of the catch roller 32A is transmitted to the resistance applying portion RA, and the catch roller 32A is in the position in the released state (second position). The rotation of the catch roller 32A is not transmitted to the resistance applying portion RA when it is located at the position).

<Modification 4 of the second embodiment>
Next, the braking device 8000 according to the modified example 4 of the fourth embodiment will be described with reference to FIGS. 23 to 25. As shown in FIGS. 20 and 21, the braking device 8000 according to this modification has a configuration in which the motion conversion unit DT and the resistance applying unit RA are arranged in parallel in the left-right direction (direction perpendicular to the paper surface). .. The outline of this modification will be described below.

As shown in FIG. 23, the motion conversion unit DT includes a catch roller 830 composed of an inner cylinder 830A and an outer cylinder 830B, and a catch roller 840 including a knurl 43 rotatably attached to a rotating shaft 41. As in FIG. 15, the inner cylinder 830A and the outer cylinder 830B are rotatably attached to the inner cylinder 830A on the rotating shaft 831, and the inner cylinder 830A and the outer cylinder 830B can rotate relative to each other and slide against a torque below a certain level. It is configured to rotate integrally due to dynamic resistance. However, unlike FIG. 15, the rotating shaft 831 is provided at the center of the catch roller 830 and is pivotally supported by the case 810A. Further, at a position eccentric from the rotating shaft 831, the guide shaft 850 projects toward both sides in the axial direction. Further, in this modification, as shown in FIG. 24, the catch roller 840 is rotatably held in the support groove 821 (see FIG. 24) of the moving case 820 that can be translated in the vertical direction. Here, in the present embodiment, the catch rollers 830 and 840 form a pair of sandwiching members (sandwiching bodies).

In this modified example as well, the resistance applying portion RA is provided with a centrifugal governor and transmits the rotation of the rotating shaft 831 to the centrifugal governor to brake it. Similar to the modified example 2, the rotation of the outer cylinder 830B of the catch roller 830 Is transmitted to the resistance applying portion RA via the pinion gear 50B (see FIG. 21). As for the configuration of the resistance imparting unit RA, those described in the above-described embodiments can be appropriately used.

The moving case 820 includes a pair of parallel plates 822 formed at both ends of the catch rollers 830 and 840, and a support groove 821 is formed in each parallel plate 822 (see FIG. 24). Further, a guide groove 823 that opens upward is formed at the center in the front-rear direction above the parallel plate 822. Further, the parallel plate 822 has an elongated hole 824 into which the guide shaft 850 can be inserted at a position in front of the guide groove 823, and the elongated hole 824 is formed in a direction in which the guide shaft 850 can move in the front-rear direction. Will be done.

Here, in the present modification, in the state where tension is not applied to the cord CD (steady state), as shown in FIG. 23A, the cord CD contacts only the catch roller 830 located above and catches. It is configured so that it does not come into contact with the roller 840.

With the above configuration, when the cord CD moves backward (to the right in FIG. 23) from the state where tension is not applied to the cord CD (steady state), the outer cylinder 830B of the catch roller 830 is shown in FIG. 23 (a). Although it tries to rotate counterclockwise (in the direction of arrow X), the catch rollers 830 and 840, which are a pair of sandwiching members, do not sandwich the cord CD (FIGS. 24 (a) and 25 (a) also). (See), the movement of the cord CD is not sufficiently transmitted as the rotation of the catch roller 830 (outer cylinder 830B), and the rotation of the outer cylinder 830B is not transmitted to the resistance applying portion RA to impart resistance to the cord CD. .. In this case, even if the outer cylinder 830B rotates, the guide shaft 850 provided in the inner cylinder 830A abuts on the elongated hole 824 of the moving case 820, and the moving case 820 is restricted to the case 810A in the front-rear direction. The cylinder 830A cannot rotate counterclockwise.

On the other hand, when the code CD moves forward (to the left in the figure), the outer cylinder 830B of the catch roller 830 rotates clockwise (in the Y direction of the arrow) as shown in FIG. 23 (b). At this time, since there is a sliding resistance between the outer cylinder 830B and the inner cylinder 830A, the outer cylinder 830B and the inner cylinder 830A start to rotate integrally. Then, at the same time as the inner cylinder 830A rotates, the guide shaft 850 provided in the inner cylinder 830A rotates clockwise, presses the upper surface of the elongated hole 824 of the moving case 820, and pushes up the moving case 820 upward (FIG. 23 (b). ), FIG. 24 (b), FIG. 25 (b)). As a result, the catch roller 840 held by the moving case 820 moves upward, that is, in a direction close to the cord CD, and cooperates with the catch roller 830 to sandwich the cord CD.

When the code CD further moves forward (to the left in the figure) in this state, the movement of the code CD is transmitted as the rotation of the outer cylinder 830B. However, after the catch roller 840 comes into contact with the cord CD, the moving case 820 cannot move further upward, so that the inner cylinder 830A cannot rotate any more, so that the inner cylinder 830A is outside the inner cylinder 830A. Only the cylinder 830B will rotate.

As a result of the above, when the code CD moves forward (to the left in the figure) with the catch roller 830 and the catch roller 840 in FIG. 23 (b) sandwiching the code CD, the movement of the code CD moves the outer cylinder 830B. The resistance applying portion RA applies a braking force to the rotation of the outer cylinder 830B, and the code CD is braked.

From the above, according to the first aspect, the braking device 8000 according to the modified example 4 of the second embodiment is provided with a one-way function in which the catch roller 830 transmits rotation in only one direction.

That is, the braking device 8000 according to the present modification realizes the one-way function by changing the frictional force acting between the sandwiching body and the cord CD by the displacement of the sandwiching body. Specifically, in the braking device 8000, the frictional force acting between the catch roller 830 and the cord CD when the catch roller 830 is positioned in the released state (second position) is sandwiched by the catch roller 830. The catch roller 830 moves so as to be smaller than the frictional force acting between the catch roller 830 and the cord CD when it is located at the position (first position) in the state.

Further, the braking device 8000 according to the present modification is configured to switch whether or not to transmit the rotation caused by the movement of the cord CD to the resistance applying portion RA depending on the displacement of the sandwiching body. Specifically, when the catch roller 830 is located at the position in the pinched state (first position), the rotation of the catch roller 830 is transmitted to the resistance applying portion RA, and the catch roller 830 is in the position in the released state (second position). The rotation of the catch roller 830 is not transmitted to the resistance applying portion RA when it is located at the position).

3. 3. Third Embodiment Next, the motion conversion unit according to the third embodiment of the present invention will be described with reference to FIGS. 26 to 28. As shown in FIG. 26, in the present embodiment, the knurl 240 and the roller portion 42 are connected via the respective shaft cores 31 and 41. Here, such a connecting method is arbitrary, and for example, as shown in FIG. 26A, a pair of plates 800 may be used. Here, in the present embodiment, the plate 800 is substantially rectangular, and for example, a metal plate 800 can be used. Further, a through hole 801 is provided at a position corresponding to the shaft core 31 and the shaft core 41 of the plate 800, and the knurl 240 and the roller portion 42 are connected by inserting the shaft core 31 and the shaft core 41 into the through hole 801. be able to.

Further, as shown in FIG. 26B, the knurl 240 and the roller portion 42 may be connected by using a string-shaped member 900 instead of the plate 800. When the string-shaped member 900 is used, as shown in FIG. 27, the knurl 240 and the roller portion 42 rotate in opposite directions when the cord CD is moved, so that the string-shaped member 900 is crossed. Here, FIG. 27 is a schematic view of a state in which the member of FIG. 26B sandwiches the cord CD as viewed from the direction of arrow Z.

Then, as shown in FIG. 28, such a member is provided inside the case 10B so as to sandwich the cord CD between the knurl 240 and the roller portion 42. Here, in FIG. 28, in order to improve visibility, a mode in which the string-shaped member 900 in FIG. 26B is used will be described. Further, it is assumed that the gravity g acts in the direction indicated by the arrow g in FIG. 28. For convenience of explanation, the direction of the arrow g is downward, and the direction opposite to the arrow g is upward.

Further, the case 10B is provided with a first side wall hole 119A at a position corresponding to the shaft core 31. The first side wall hole 119A is an oval shape that inclines toward the front. In addition, these shapes are not particularly limited and can be appropriately designed.

The shaft core 31 is movable along the first side wall hole 119A. That is, the knurl 240 is a roller provided at a position where it can come into contact with the cord CD and can move in the vertical direction.

Further, inside the case 10B, a support column 92 is fixed at a position facing the knurl 240 with the cord CD sandwiched and in front of the knurl 240.

First, when tension is applied to the cord CD in the direction of arrow D2 from the state shown in FIG. 28 (a), the knurl 240 moves into the first side wall hole 119A in the direction of arrow D3 due to the frictional force generated between the cord CD and the cord CD. Move down along. As shown in FIG. 28B, such a position is defined as a first position which is a lower position in the movable direction having a vertical component. In such a state, since the distance between the knurl 240 and the support column 92 in the vertical direction is small, the cord CD is bent and becomes a pinched state. That is, the support column 92 functions as a sandwiching member located so as to sandwich the knurl 240 and the cord CD. Further, the roller portion 42 functions as an auxiliary roller that moves in conjunction with the knurl 240.

Here, when the shaft core 31 reaches the front limit of the movable range in the pinched state, the knurl 240, which has been substantially translated, starts rotating (clockwise in the drawing). Then, the rotation of the shaft core 31 may be output to the resistance applying portion RA that generates a resistance force with the movement of the cord CD. At this time, when the cord CD moves forward, the rotation is transmitted to the resistance applying portion RA, but when the cord CD moves backward, the rotation is not transmitted to the resistance applying portion RA, so that the knurl 240 or the knurl 240 A one-way clutch may be provided between the resistance applying portion RA and the resistance applying portion RA. Here, the resistance applying portion RA may be provided inside or outside the case 10B, or may be provided inside the knurl 240.

On the other hand, when tension is applied to the cord CD in the direction opposite to the arrow D2, the operation in the direction opposite to the above operation occurs, so that the distance between the knurl 240 and the support column 92 in the vertical direction is separated, and the pinching force with respect to the cord CD is weakened. It becomes.

Then, as shown in FIG. 28 (a), the shaft core 31 is located at an upper position in the movable direction (oblique direction in FIG. 28) having a vertical component of the first side wall hole 119A against gravity g. Move to position. Such a state is called a free movement state. In the free movement state, the cord CD is released in the non-bent state. Then, the free movement of the code CD can be permitted.

Instead of the shaft core 31 and the knurl 240, and the shaft core 41 and the roller portion 42, a column that does not rotate can be used.

Here, the sandwiching body is composed of an output sandwiching body (lorette 240 and the shaft core 31) and a capturing pinching body (post 92), and is sandwiched for output when the cord CD moves in one direction (arrow D2 direction). In the transmission mode, the rotation of the output sandwiching body is transmitted to the resistance applying portion via the body, and when the code CD moves in the other direction (opposite to the arrow D2), the capturing sandwiching body and the output sandwiching body Is in a non-transmission mode in which the relative movement does not transmit the rotation of the output sandwiching body to the resistance applying portion. Here, the capturing body is a relative moving body that can move relative to the output sandwich in the near-distance direction. Further, the output sandwiching body and the capturing sandwiching body sandwich the cord CD to brake the displacement of the cord CD. Here, in the non-transmission mode, the output sandwiching body and the capturing sandwiching body are separated from each other, or even if they are in contact with each other, the rotation of the output sandwiching body cannot be transmitted to the resistance applying portion. It is in a state. Further, in the transmission mode, the output sandwiching body and the capturing sandwiching body are in contact with each other, and the rotation of the capturing sandwiching body is transmitted to the output sandwiching body to brake the displacement of the code CD.

Further, by using the device using the member according to the present embodiment, it is possible to sandwich the cord CDs having different thicknesses. That is, assuming that the code CD shown in FIG. 28 is a code CD having a first thickness, when a second code CD thicker than the first thickness is used, the knurls in FIGS. 28 (a) and 28 (b) are used. 240 moves upward (opposite to arrow g) by the amount of the thickened code CD. Here, the position of the support column 92 and the knurl 240 when sandwiching the cord CD of the first thickness shown in FIG. 28 is set as the first position, and the support column when sandwiching the cord CD of the second thickness. Assuming that the positions of the 92 and the knurl 240 are the second positions, it can be said that the second position is a position where the support column 92 and the knurl 240 are separated from each other from the first position.

That is, the device using the member according to the present embodiment can be regarded as a shielding device having a sandwiching body having a cord sandwiching range corresponding to cords having different thicknesses. Here, the shaft core 41, the roller portion 42, and the support column 92 form a sandwiching body.

The first position and the second position are not absolutely defined, and a position relatively higher than the first position in the vertical direction may be set as the second position. Further, the shaft core 41 and the roller portion 42 can be omitted if necessary.

<Action / effect>
With the above configuration, the following actions and effects can be obtained.
(1) By providing a one-way function in the sandwiching body that captures the movement of the cord and transmits the rotation caused by the movement of the cord to the resistance applying portion, the parts are compared with the conventional configuration in which the one-way clutch is separately provided. The number can be reduced and the volume of the device can be reduced.
(2) With such a configuration, it is possible to sandwich cord CDs having different thicknesses without changing the configuration of the device. Therefore, one device can be used for various cloaking devices.
(3) Since the cord CD does not bend (non-bend) during free movement, the bending resistance becomes small and the cord CD can move more smoothly.
(4) The operating force can be reduced during the pulling operation, the cord CD can be reliably sandwiched during the automatic operation (automatic descent), and an unintended fall can be prevented.
(5) When the brake is applied, the resistance force from the cord is output to the resistance applying portion, and when the free movement of the cord is permitted, the resistance force from the cord can be separated from the resistance applying portion.
(6) Since the pair of sandwiching bodies of the roller portion 42 and the knurl 240 are connected by a string-shaped member and the cord and the knurl 240 are in constant contact with each other, the pair of sandwiching bodies move in the direction of being sandwiched during braking. Can be activated to be done. Therefore, as the cord moves, it can be reliably moved from the pinched state to the free moving state and from the free moving state to the pinched state.

4. Fourth Embodiment Next, another motion conversion unit according to the fourth embodiment of the present invention will be described with reference to FIG. 29. As shown in FIG. 29, in the case 10C according to the present embodiment, a storage space 93 slightly larger than the diameter of the knurl 240 is formed. Here, the accommodation space 93 has a shape that is a combination of an arc shape and a semi-linear shape in a cross-sectional view. Therefore, the knurl 240 can move freely in the accommodation space 93. Further, in the accommodation space 93, a pinch guide slope 93a and a release side regulation surface 93d are formed.

Then, a shaft core 31, a knurl 240, a support column 92, two output shafts 95, and an endless belt 94 are arranged inside the case 10C. The knurl 240 is provided so as to make slight contact with the cord CD in the free moving state.

The knurl 240 is provided so as to sandwich the cord CD with the roller portion 42. Then, the endless belt 94 is stretched on the two output shafts 95. The endless belt 94 is configured so that the endless belt 94 can rotate by applying a resistance force due to the rotation of the knurl 240. Alternatively, if possible, the surface of the endless belt 94 may be shaped so as to mesh with the surfaces of the knurl 240 and the output shaft 95. Further, the output shaft 95 is configured to output its own rotation to a resistance imparting unit that generates a resistance force with the movement of the code CD. The output shaft 95 and the endless belt 94 are configured so that the endless belt 94 is substantially in line with the half-straight portion of the accommodation space 93.

First, when tension is applied to the cord CD in the direction of arrow D4 from the state shown in FIG. 29 (a), the knurl 240 rotates in the direction of arrow D5 due to the frictional force generated between the cord CD and the cord CD, and the accommodation space is accommodated. It moves in the direction approaching the endless belt 94 via the half-straight portion of 93 (first position). As shown in FIG. 29B, in such a state, since the distance between the knurl 240 and the support column 92 in the vertical direction is small, the cord CD bends and becomes a pinched state. That is, the support column 92 functions as a sandwiching member located so as to sandwich the knurl 240 and the cord CD.

In the sandwiched state, the rotation of the output shaft 95 may be output to the resistance applying portion RA. That is, the frictional force acting between the knurl 240 and the endless belt 94 causes the endless belt 94 to rotate in the direction opposite to the arrow D5 (counterclockwise) with respect to the output shaft 95. As a result, the output shaft 95 also rotates (rotates) in the same direction (counterclockwise) as the endless belt 94. This rotation is output to the resistance applying unit RA. In such a configuration, one of the output shafts 95 exerts the same function as the shaft core 31 in the third embodiment (transmission of rotation to the resistance applying portion RA). At this time, when the cord CD moves forward, the rotation is transmitted to the resistance applying portion, but when the cord CD moves backward, the rotation is not transmitted to the resistance applying portion RA, so that the knurl 240 and the resistance applying portion RA A one-way clutch may be provided between them.

On the other hand, when tension is applied to the cord CD in the direction opposite to the arrow D4, the operation in the direction opposite to the above operation occurs, so that the distance between the knurl 240 and the support column 92 in the vertical direction is separated, and the pinching force with respect to the cord CD is weakened. It becomes.

Then, as shown in FIG. 29 (a), the shaft core 31 moves to the second position, which is a position away from the endless belt, against the gravity g. Such a state is called a free movement state. In the free movement state, the cord CD is released in the non-bent state. Then, the free movement of the code CD can be permitted.

It should be noted that the shaft core and the roller portion can be used instead of the support column 92.

Here, the sandwiching body is composed of an output sandwiching body (lorette 240 and the shaft core 31) and a capturing pinching body (post 92), and is sandwiched for output when the cord CD moves in one direction (arrow D4 direction). In the transmission mode, the rotation of the output sandwiching body is transmitted to the resistance applying portion via the body, and when the code CD is moved in the other direction (opposite to the arrow D4), the capturing sandwiching body and the output sandwiching body are transmitted. Is in a non-transmission mode in which the relative movement does not transmit the rotation of the output sandwiching body to the resistance applying portion. Here, the capturing body is a relative moving body that can move relative to the output sandwich in the near-distance direction. Further, the output sandwiching body and the capturing sandwiching body sandwich the cord CD to brake the displacement of the cord CD. Here, in the non-transmission mode, the output sandwiching body and the capturing sandwiching body are separated from each other, or even if they are in contact with each other, the rotation of the output sandwiching body cannot be transmitted to the resistance applying portion. It is in a state. Further, in the transmission mode, the output sandwiching body and the capturing sandwiching body are in contact with each other, and the rotation of the capturing sandwiching body is transmitted to the output sandwiching body to brake the displacement of the code CD.

Further, in the device using the member according to the present embodiment, the frictional force acting between the knurl 240 and the cord CD when the knurl 240 is located at the second position is when the knurl 240 is located at the first position. The knurl 240 is configured to move so as to be smaller than the frictional force acting between the knurl 240 and the cord CD.

Further, when the rotation of the output shaft 95 is output to the resistance applying portion RA that generates a resistance force with the movement of the code CD, the knurl 240 is positioned at the first position in the device using the member according to the present embodiment. The rotation of the knurl 240 due to the movement of the code CD is output to the resistance applying unit RA, and the rotation of the knurl 240 due to the movement of the code CD when the knurl 240 is located at the second position is output to the resistance applying unit RA. It is configured not to output to.

Further, by using the device using the member according to the present embodiment, it is possible to sandwich the cord CDs having different thicknesses. That is, assuming that the code CD shown in FIG. 29 is a code CD having a first thickness, when a second code CD thicker than the first thickness is used, the knurls in FIGS. 29 (a) and 29 (b) are used. 240 moves upward (opposite to arrow g) by the amount of the thickened code CD. Here, the position of the support column 92 and the knurl 240 when sandwiching the cord CD of the first thickness shown in FIG. 29 is set as the first position, and the support column when sandwiching the cord CD of the second thickness. Assuming that the positions of the 92 and the knurl 240 are the second positions, it can be said that the second position is a position where the support column 92 and the knurl 240 are separated from each other from the first position.

That is, the device using the member according to the present embodiment can be regarded as a shielding device having a sandwiching body having a cord sandwiching range corresponding to cords having different thicknesses. Here, the support column 92, the shaft core 31, and the knurl 240 form the sandwiching body.

In FIG. 29A, the knurl 240 and the endless belt 94 are separated from each other, but the present invention is not limited to this. For example, the knurl 240 and the endless belt 94 are not disengaged even in the free movement state, and the pinching force to the cord CD can be weakened.

<Action / effect>
With the above configuration, the following actions and effects can be obtained.
(1) By providing a one-way function in the sandwiching body that captures the movement of the cord and transmits the rotation caused by the movement of the cord to the resistance applying portion, the parts are compared with the conventional configuration in which the one-way clutch is separately provided. The number can be reduced and the volume of the device can be reduced.
(2) With such a configuration, it is possible to sandwich cord CDs having different thicknesses without changing the configuration of the device. Therefore, one device can be used for various cloaking devices.
(3) Since the cord CD does not bend (non-bend) when it is freely moved, the resistance is reduced and the cord CD can be moved more smoothly.
(4) The operating force can be reduced during the pulling operation, the cord CD can be reliably sandwiched during the automatic operation (automatic descent), and an unintended fall can be prevented.
(5) When the brake is applied, the resistance force from the cord is output to the resistance applying portion, and when the free movement of the cord is permitted, the resistance force from the cord can be separated from the resistance applying portion.
(6) By providing the moving contact surface 93a (MN) that contacts the outer peripheral surface of the roller, the knurl 240 can be reliably moved from the pinched state to the free moving state and from the free moving state to the pinched state.

5. Fifth Embodiment Next, another motion conversion unit according to the fifth embodiment of the present invention will be described with reference to FIG. Since the arrangement of the members in this embodiment is similar to the configuration in the third embodiment, the differences will be described below. In this embodiment, unlike the third embodiment, a one-way clutch 245 is provided inside the knurl 240. The one-way clutch 245 is a clutch that can rotate only in the direction of arrow D7. That is, the one-way clutch 245 also allows the knurl 240 to rotate only in the direction of arrow D7. The major difference between the present embodiment and the third embodiment is that the knurl 240 does not move in the present embodiment.

Then, when the cord CD moves in the direction of arrow D6, the knurl 240 rotates in the direction of arrow D7 due to the frictional force acting between the cord CD and the knurl 240. Then, the rotation of the shaft core 31 is output to the resistance applying portion that generates a resistance force with the movement of the cord CD.

On the other hand, when the code CD moves in the direction opposite to the arrow D6, the one-way clutch 245 cannot rotate in the direction opposite to the arrow D7. Therefore, the rotation of the knurl 240 is restricted. As a result, when the cord CD moves in the direction opposite to the arrow D6, the rotation of the shaft core 31 is not output to the resistance applying portion that generates a resistance force with the movement of the cord CD.

As described above, in the present embodiment, the one-way function is realized by providing the one-way clutch 245 inside the sandwiching body. Then, when the cord CD moves in the direction of the arrow D6, the resistance force from the resistance imparting portion can be applied to the cord CD. On the other hand, when the code CD moves in the direction opposite to the arrow D6, the resistance force from the resistance imparting portion is not given to the code CD, and the free movement of the code CD can be permitted.

<Action / effect>
With the above configuration, the following actions and effects can be obtained.
(1) The sandwiching body that captures the movement of the cord and transmits the rotation caused by the movement of the cord to the resistance applying portion has a one-way function, and the one-way clutch is provided inside the sandwiching body to provide the one-way function. By realizing the above, the number of parts can be reduced and the volume of the device can be reduced as compared with the conventional configuration in which the one-way clutch is separately provided.

6. Sixth Embodiment Next, the braking device 5000 according to the sixth embodiment will be described with reference to FIGS. 31 to 33. The braking device 5000 of this embodiment is composed of a case 510A and a slider 520, and the resistance applying portion RA is not shown. As shown in FIG. 32 (b), the braking device 5000 of the present embodiment also functions as a resistance applying portion RA in which a resistance force is given to the movement of the cord CD by the bending resistance caused by the bending of the cord CD. Of course, as described above, the resistance applying portion RA may be provided side by side, and the rotation of the sandwiching body may be transmitted to the resistance applying portion RA for braking. In this embodiment, the left direction of FIG. 32 corresponds to the front direction of the above-described embodiment. Hereinafter, the differences from the above-described embodiment will be mainly described.

As shown in FIGS. 31 and 32, the case 510A is a member having a substantially rectangular parallelepiped shape, and is fixed to, for example, a head box of a shielding device. The inside of the case 510A penetrates in the front-rear direction, and an upper space SA in which the guide rail 511 is formed and a lower space SB formed below the upper space are formed. Since the guide rail 511 is formed in the front-rear direction and the slider 520 can be translated in the front-rear direction, the guide rail 511 is translated while maintaining a state orthogonal to the code CD. That is, in the present embodiment, the guide rail 511 functions as a guide portion for guiding the slider 520. Further, an idle roller 40 is rotatably provided in front of the lower space SB. Further, roller friction surfaces MN 541 and 542 are provided in the lower space SB of the case 510A, and as shown in FIG. 32, the outer peripheral surface of the friction portion 240 of the slide roller 530 is in contact with the roller friction surface MN. The narrowest width of the lower space SB, that is, the width between the roller friction surfaces MN541 and 542 in the XY direction is such that a plurality of cord CDs (three in FIG. 31) can be inserted. Further, the roller friction surface MN is interrupted at a predetermined length in the front-rear direction as shown in FIG. 32. Therefore, when the slide roller 530 is in contact with the roller friction surface MN and receives the torque of the slider 520, the slider 520 is configured to move in the front-rear direction. As shown in FIG. 31, the roller friction surface MN may be provided with a narrow groove in the XY direction to secure friction.

The slider 520 is a substantially U-shaped member having a bottom plate 521 and a pair of side plate portions 522 extending upward from both ends of the bottom plate 521 and opening downward and in the front-rear direction, and has a shaft between the pair of side plate portions 522. A slide roller 530 having a core 31 and a friction portion 240 is attached so as not to rotate. Therefore, it is also possible to transmit the rotation of the friction portion 240 to the resistance applying portion provided outside the case via the shaft core 31. As described above, in the present embodiment, the sandwiching body is composed of a pair of narrow-fitting members, a slide roller 530 and an idle roller 40.

With the above configuration, when the cord CD is pulled and moved backward, as shown in FIG. 32A, the cord CD rotates the slide roller 530 and reacts with the friction with the roller friction surface MN. The slider 520 moves backward. As a result, the distance between the slide roller 530 and the idle roller 40 is increased, the bending of the cord CD becomes gentle, and the resistance to the movement of the cord CD is reduced. At the movement limit position, the roller friction surface MN is interrupted, and the friction between the slide roller 530 and the roller friction surface MN is reduced. In addition, the case 510A is provided with a movement restricting unit 543 that prevents the slider 520 from moving beyond the movement limit position, so that the slider 520 does not fall off from the case 510A.

On the other hand, when the cord CD receives a pulling force due to the weight of the shielding device or the like and moves forward, as shown in FIG. 32 (b), the slide roller 530 rotates with the movement of the cord CD and becomes the roller friction surface MN. The slider 520 moves forward due to the reaction of the friction of. Then, the distance between the slide roller 530 and the idle roller 40 becomes closer, and the bending of the cord CD becomes so large that it becomes substantially S-shaped, and the resistance to the movement of the cord CD increases. Due to this braking force, the shielding material such as a blind can be lowered at a lower speed than the natural fall. Further, as shown in FIG. 32 (b), the roller friction surface MN on the front side is also formed so as to be interrupted at the braking side movement limit position, so that the braking force due to friction with the roller friction surface MN is not unnecessarily increased. ..

<Action / effect>
With the above configuration, the following actions and effects can be obtained.
(1) Since the slide roller 530 is held by the slider 520 that moves in parallel, the slide roller 530 moves while maintaining an orthogonal state with respect to the code CD, so that the braking force for a plurality of code CDs is made uniform during braking. This makes it possible to stably perform the braking operation during the automatic operation of the shielding material.
(2) The slide roller 530 is brought into contact with the case 510A (the part is the roller friction surface MN) so that the cord CD bends when the cord CD moves in the braking direction, so that a braking force can be reliably obtained. it can.
(3) The braking force is surely reduced by contacting the slide roller 530 with the case 510A (the part is the roller friction surface MN) and extending the cord CD when moving in the release direction of the cord CD. Can be done. Further, the braking force can be further reduced by configuring the slide roller 530 so as not to come into contact with the roller friction surface MN at the movement limit position on the release side of the slide roller 530.
(4) By making the slider 520 movable with respect to the case 510A and providing the regulating portion 543 to prevent the slider from moving beyond the movement limit position, it is possible to prevent the slider from falling out of the case.
(5) Since the contact between the roller friction surface MN on the braking side and the slide roller 530 is interrupted at the braking side movement limit position, the braking force is not unnecessarily increased, and the shielding material descends at the lower part when descending. It can be prevented from becoming difficult.

Also in the present invention, the cord CD may be provided with resistance by connecting the resistance applying portion RA of the above-described embodiment to the shaft core 31 of the slide roller 530 or the shaft core 41 of the idle roller 40. it can.

<Modified example of the sixth embodiment>
FIG. 33 shows an example of a modification of the braking device 5000 of the present embodiment. This example is similar to the embodiment shown in FIGS. 31 and 32, but the outer diameters of the slide roller 530 and the idle roller 40 and the shape of the roller friction surface MN are different. Further, it is different in that not only the bending resistance is imparted but also the slide roller 530 and the idle roller 40 can be sandwiched and the movement is assisted by the imparting means.

As shown in FIG. 33, the heights provided in the case 510A of the slide roller 530 and the idle roller 40 are arranged so that the movement locus of the slide roller 530 and the upper position of the idle roller overlap. Therefore, when the slider 520 moves to the braking side, the slide roller 530 and the idle roller cord sandwich the CD.

Further, as shown in FIG. 33, by using the slider 520 as a magnetic material (biasing means) and providing the case 510A with a magnet MG (biasing means), the slider 520 is always assisted to move to the braking side. Therefore, even if the slider 520 moves beyond the roller friction surface MN to the release side, it is attracted by the magnetic force and the slider always comes into contact with the roller friction surface MN. Therefore, when the cord CD receives the braking force, the slider can be reliably moved to the braking side by the rotation of the slide roller 530. It is preferable that the magnet MG is installed in the case at a position where the cord CD is sandwiched between both rollers and the magnetizing force is most increased.

7. Seventh Embodiment Next, the braking device 6000 according to the sixth embodiment of the present invention will be described with reference to FIGS. 34 and 35. In this embodiment, only the motion conversion unit DT will be described, and the other parts will be omitted by combining arbitrary configurations already described. As shown in FIG. 34, in the present embodiment, the shaft core 31 of the knurl 240 constituting the tension transmission roller 30 and the shaft core 251 of the holding roller 250 holding the cord CD below the knurl 240 are a pair of plates. It is connected via 800. Here, in the present embodiment, the plate 800 is substantially rectangular, and for example, a metal plate 800 can be used. Further, a through hole 801 is provided at a position corresponding to the shaft core 31 and the shaft core 251 of the plate 800, and the knurl 240 and the holding roller 250 are connected by inserting the shaft core 31 and the shaft core 251 into the through hole 801. be able to.

Then, as shown in FIG. 35, such a member is provided inside the case 10B so as to sandwich the cord CD between the knurl 240 and the holding roller 250. Here, in FIG. 35, only the outer edge of the plate 800 is drawn in order to improve visibility. Further, it is assumed that the gravity g acts in the direction indicated by the arrow g in FIG. 35. For convenience of explanation, the direction of the arrow g is downward, and the direction opposite to the arrow g is upward.

Further, the case 10B is provided with a side wall hole 119A at a position corresponding to the shaft core 31. The side wall hole 119A is an oval shape that inclines toward the front, and an inner peripheral surface is formed by the pinching guide slope 119a, the release guide slope 119b, the pinch side regulation surface 119c, and the release side regulation surface 119d. To. In addition, these shapes are not particularly limited and can be appropriately designed.

The shaft core 31 is movable along the side wall hole 119A. That is, the tension transmission roller 30 is a roller that is provided at a position where it can come into contact with the cord CD and can move in the vertical direction.

Further, inside the case 10B, a support column 92 is fixed at a position facing the tension transmission roller 30 with the cord CD sandwiched and in front of the tension transmission roller 30.

First, when tension is applied to the cord CD forward (to the left in the figure) from the state shown in FIG. 35 (a), the tension transmission roller 30 moves in the direction of arrow D3 due to the frictional force generated between the cord CD and the cord CD. It moves downward along the pinching guide slope 119a of the side wall hole 119A. As shown in FIG. 35 (b), such a position is defined as a first position which is a lower position in the movable direction having a vertical component. In such a state, since the distance between the tension transmission roller 30 and the support column 92 in the vertical direction is small, the cord CD is bent and becomes a pinched state. That is, in the present embodiment, the tension transmission roller 30 and the support column 92 function as a pair of sandwiching members. Further, the holding roller 250 functions as an auxiliary roller that moves in conjunction with the tension transmission roller 30.

Here, when the shaft core 31 reaches the front limit of the movable range in the pinched state, the tension transmission roller 30 which has been substantially translated starts to rotate (clockwise in the drawing). Then, the rotation of the shaft core 31 may be output to the resistance applying portion that generates a resistance force with the movement of the cord CD. At this time, when the cord CD moves forward, the rotation is transmitted to the resistance applying portion (not shown), but when the cord CD moves backward, the tension transmission roller 30 is used so that the rotation is not transmitted to the braking device. A one-way clutch may be provided between the braking devices. Here, the resistance applying portion may be provided inside or outside the case 10B, or may be provided inside the tension transmission roller 30.

On the other hand, when tension is applied to the cord CD backward (to the right in the figure), an operation opposite to the above operation occurs, so that the tension transmission roller 30 and the support column 92 are separated from each other in the vertical direction and sandwiched with respect to the cord CD. The force will be weakened.

Then, as shown in FIG. 35 (a), the shaft core 31 is on the upper side in the movable direction (oblique direction in FIG. 35) having the vertical component of the side wall hole 119A along the release guide slope 119b against the gravity g. Move to the second position, which is the position. Such a state is called a free movement state. In the free movement state, the cord CD is released in the non-bent state. Then, the free movement of the code CD can be permitted.

Instead of the shaft core 31 and the tension transmission roller 30, and the shaft core 251 and the holding roller 250, a strut that does not rotate can be used.

That is, the device using the member according to the present embodiment includes the plate 800 as a holding member for holding the tension transmission roller 30 which is one of the pair of sandwiching members, and a pair of narrow fitting members as the plate 800 moves. The tension transmission roller 30 and the support column 92, which are one and the other of the members, sandwich the cord CD. Further, in the present embodiment, it can be said that gravity is an urging member that urges the plate 800, which is a holding member.

<Action / effect>
With the above configuration, the following actions and effects can be obtained.
(1) The tension transmission roller 30 and the plate 800 holding the holding roller 250, which are one of the pair of narrowing members, are urged downward by gravity, so that the tension transmission roller 30 moves in the direction approaching the cord CD. It is composed. Therefore, the tension transmission roller 30 can surely narrow the cord CD in cooperation with the support column 92.
(2) Since the tension transmission roller 30 which is a narrowing member is held by the shaft core 31 and the shaft core 31 moves in parallel along the first side wall hole 119A, the tension is transmitted to the cord CD. The inclination of the roller 30 is suppressed, and the braking operation of the code CD can be stably performed.
(3) The operating force can be reduced during the pulling operation, the cord CD can be reliably sandwiched during the automatic operation (automatic descent), and an unintended fall can be prevented.
(4) A pair of sandwiching bodies of the roller portion 250 and the knurl 240 are connected by a plate or a string-shaped member, and the cord and the knurl 240 are always in contact with each other. Therefore, the direction in which the pair of sandwiching bodies are sandwiched during braking. Can be activated to be moved to. Therefore, as the cord moves, it can be reliably moved from the pinched state to the free moving state and from the free moving state to the pinched state.

The braking device 6001 as shown in FIG. 36 can also be used as a configuration in which the tension transmission roller 30 is urged downward by gravity. Specifically, unlike the braking device 6000 described above, the tension transmission roller 30 of the braking device 6001 is not connected to the plate 800 and the holding roller 250, and is simply on the cord CD. Even with such a configuration, when the cord CD is moved forward (to the left in the figure), the tension transmission roller 30 moves downward along the first side wall hole 119A, and the distance from the support column 92 becomes closer. And insert the code CD. On the other hand, when the cord CD is moved rearward (to the right in the figure), the tension transmission roller 30 and the support column 92 are separated from each other, and the pinching force with respect to the cord CD is weakened.

8. Eighth Embodiment Next, the braking device 7000 according to the eighth embodiment of the present invention will be described with reference to FIGS. 37 to 38. The braking device 7000 of the present embodiment is held by a link mechanism 720 composed of a pair of link plates 721 and 722 on both ends in the axial direction of each axial center of the pair of sandwiching members.

As shown in FIG. 37, the pair of sandwiching members according to the present embodiment is composed of a tension transmission roller 30 including a knurl 240 and an idle roller 40 including a roller portion 42. The shaft core 31 of the tension transmission roller 30 extending in the vertical direction is pivotally supported on one end side of the pair of link plates 721 on both ends in the axial direction, and the shaft core 41 of the idle roller 40 extending in the vertical direction is similarly supported at both ends in the axial direction. On the side, it is pivotally supported on one end side of the pair of link plates 722. Further, the shaft core 31 of the tension transmission roller 30 is provided with a rotation transmission portion (not shown) attached to an end portion opposite to the tension transmission roller 30 so that the rotation can be transmitted to the resistance applying portion RA.

The link plate 721 and the link plate 722 are rotatably connected to each other via a shaft 723 inserted into a hole formed in the center of the plate to form a link mechanism 720. Further, at the other end of the link plates 721 and 722, connecting pins 724 and 725 extending in the vertical direction and connecting the link plates 721 and 722 are provided.

Then, as shown in FIG. 38, the connecting pin 724 and the connecting pin 725 are pressed in a direction in which the coil portion approaches each other by a torsion spring 726 as an urging means wound around the shaft 723. Therefore, the link plate 721 and the link plate 722 are urged so that the tension transmission roller 30 and the idle roller 40 held by each rotate around the shaft 723 in a direction approaching each other, and as a result, these rollers 30, The code CD is sandwiched by 40. Although not shown in FIG. 37, the shaft 723 is pivotally supported by the case 10A.

With the above configuration, in a state where tension is not applied to the cord CD as shown in FIG. 38A (steady state), the tension transmission roller 30 and the idle roller 40 are torsion springs via the link mechanism 720. By being urged by 726, the code CD is sandwiched. When the cord CD moves forward (to the left in FIG. 38) in this state, the movement of the cord CD is transmitted to the tension transmission roller 30, and the rotation of the tension transmission roller 30 is the carrier 260 with internal teeth, the planetary gear 280, and the sun gear. It is sequentially transmitted to the attached weight holder 320, the weight 340 is rotated, and a braking force is applied to the cord CD by the rotational resistance of the weight 340. That is, also in this embodiment, the narrowing member sandwiches the cord CD with the movement of the link mechanism 720 (link plate 721 and link plate 722) which is the holding member.

On the other hand, when the cord CD moves rearward (to the right in FIG. 38), as shown in FIG. 38 (b), the tension transfer roller 30 held by the link plate 721 and the idle roller 40 held by the link plate 722 are moved. As the cord CD moves, it rotates around the shaft 723 in a direction in which the distance between the tension transmission roller 30 and the idle roller 40 increases against the urging force of the torsion spring 726 via the link mechanism 720. As a result, the narrowing of the cord CD by the narrowed body is weakened, and the imparting of resistance to the cord CD of the resistance applying portion RA via the tension transmission roller 30 is reduced.

In this way, even when the axis (rotational axis) of the sandwiching member is rotationally moved (revolved) around a certain axis as in the link mechanism 720 of the present embodiment, the axis keeps its direction constant. It moves in parallel as it is.

<Action / effect>
With the above configuration, the following actions and effects can be obtained.
(1) A direction in which the tension transmission roller 30 and the idle roller 40 approach the cord CD by urging the tension transmission roller 30 and the idle roller 40, which are a pair of narrowing members, to the torsion spring 726 via the link mechanism 720. It is configured to move to. Therefore, the tension transmission roller 30 can surely narrow the cord CD in cooperation with the idle roller 40, and can reduce the braking force against the movement of the cord CD to the rear.

(2) Since the tension transmission roller 30 and the idle roller 40, which are a pair of narrowing members, are held by the link mechanism 720 that rotates around the shaft 723 extending in the vertical direction, the tension transmission roller 30 and the idle roller 40 are held. The shaft cores 31 and 41 move while maintaining a state of extending in the vertical direction. Therefore, the tension transmission roller 30 and the idle roller 40 are suppressed from being tilted with respect to the cord CD, and the braking operation of the cord CD can be stably performed.

In the above embodiment, the link mechanism 720 has a configuration in which a pair of link plates 721 and 722 are arranged on both ends in the axial direction, but it is also possible to provide a pair of link plates on only one side in the axial direction. is there.

9. Ninth Embodiment Next, the braking device 8000 according to the ninth embodiment of the present invention will be described with reference to FIGS. 39 and 40. As shown in FIG. 39, the braking device 8000 of the present embodiment uses the screw 861 of the oil damper 860 via the first and second bevel gears 830 and 831 in which the rotation of the tension transmission roller 30 is held in the moving case 820. It is configured to rotate. The outline of this embodiment will be described below. In this embodiment, the left direction of FIGS. 39 and 40 corresponds to the front direction of the above-described embodiment.

As shown in FIGS. 39 and 40, the pair of sandwiching members of the sandwiching body in the present embodiment is composed of a tension transmission roller 30 held by the moving case 820 and an idle roller 40 fixed to the fixing member 840. It is composed. The tension transmission roller 30 includes a shaft core 31 and a knurl 240 as in the second embodiment, and is held by the moving case 820 as a holding member via the shaft core 31. The idle roller 40 is rotatably held by the fixing member 840 via the shaft core 41, and in the present embodiment, the idle roller 40 also has the knurl 43.

As shown in FIG. 39, the rotation of the tension transmission roller 30 is first transmitted to the first bevel gear 830 via the shaft core 31, and the rotation of the first bevel gear 830 around the axis in the left-right direction meshes with the second bevel gear 831. It is transmitted as a rotation around the axis that differs by 90 degrees. The rotation of the second bevel gear 831 is transmitted to the transmission shaft 850 having one end connected to the second bevel gear 831 and transmitted to the screw 861 attached to the other end side, so that the screw 861 rotates. The screw 861 is arranged in the housing 862 of the oil damper 860 filled with the oil Vf which is a viscous fluid, and the transmission shaft 850 penetrates through the through hole 863 formed in the housing 862. A bearing 864 is provided which holds the transmission shaft 850 rotatably and movably in the front-rear direction and further prevents oil Vf from leaking.

The oil damper 860 is a braking torque that attenuates the relative rotation speed between the housing 862 and the transmission shaft 850 by receiving viscous resistance from the oil when the transmission shaft 850 rotates relative to the housing 862. Occurs. Further, in the present embodiment, when the rotation of the tension transmission roller 30 when the cord CD moves forward is transmitted to the screw 861, the screw 861 moves forward due to the thrust generated in the oil Vf. Be urged to. Further, when the rotation of the tension transmission roller 30 when the cord CD moves rearward is transmitted to the screw 861, the screw 861 is urged backward by thrust.

Further, the tension transmission roller 30, the shaft core 31, the first and second bevel gears 830, 831, the transmission shaft 850, and the screw 861 described above are held in the moving case 820. Since the moving case 820 can move in the front-rear direction along the moving case support shaft 870 extending in the front-rear direction on the upper surface of the fixing member 840, the moving case 820 moves with the movement of the tension transmission roller 30 in the front-rear direction. , The moving case 820 and the first and second bevel gears 830 and 831 held by the moving case 820, the transmission shaft 850 and the screw 861 can also be moved in the front-rear direction.

With the above configuration, when the cord CD moves backward (to the right in FIG. 39) from the state where tension is not applied to the cord CD (steady state), as shown in FIGS. 39 (a) and 40 (a). In addition, the tension transmission roller 30 is pressed backward as the cord CD moves. In addition, when the rotation of the tension transmission roller 30 is transmitted to the screw 861, the screw 861 is urged backward by thrust. Therefore, in this case, the tension transmission roller 30, the shaft core 31, the first and second bevel gears 830, 831, the transmission shaft 850, and the screw 861 held in the moving case 820 move rearward, and the tension transmission roller 30 and the idle roller are moved. The pinching force of the cord CD by 40 is reduced. As a result, the application of resistance to the cord CD of the oil damper 860 via the tension transmission roller 30 is weakened, and the cord CD can be easily moved.

On the other hand, when the cord CD moves forward (to the left in the figure), the tension transmission roller 30 is pressed forward as the cord CD moves, as shown in FIGS. 39 (b) and 40 (b). In addition, when the rotation of the tension transmission roller 30 is transmitted to the screw 861, the screw 861 is urged forward by thrust. Therefore, in this case, the tension transmission roller 30, the shaft core 31, the first and second bevel gears 830, 831, the transmission shaft 850, and the screw 861 held in the moving case 820 move forward to and the tension transmission roller 30. The pinching force of the cord CD by the idle roller 40 increases. As a result, the rotational resistance of the oil damper 860 can be reliably transmitted to the cord CD, and the cord CD can be braked.

<Action / effect>
With the above configuration, the following actions and effects can be obtained.
(1) When the tension transmission roller 30 and the idle roller 40, which are a pair of narrowing members, are urged by the thrust of the screw 861 and the cord CD moves forward, the tension transmission roller 30 and the idle roller 40 Is configured to move in the direction closer to the code CD. Therefore, the tension transmission roller 30 can surely narrow the cord CD in cooperation with the idle roller 40, and can reduce the braking force against the movement of the cord CD to the rear.

10A-10D: Case, 31,41: Shaft core, 50: Pinion gear, 70: Base, 200: Alignment member, 220: Slider, 240: Knurling, 260: Carrier with internal teeth, 280: Planetary gear, 300: Plate , 320: Weight holder with sun gear, 340: Weight

Claims (4)

A code movement capture device that cooperates with a braking device that brakes a code that moves with the automatic operation of the cloaking device.
The cord movement capture device includes a pair of sandwiches and a case.
At least one sandwich is a roller,
A cord movement capturing device characterized in that the case is provided with a moving contact surface (MN) that contacts the outer peripheral surface of the roller, and the pair of sandwiching bodies are sandwiched during braking. A code movement capture device that cooperates with a braking device that brakes a code that moves with the automatic operation of the cloaking device.
The cord movement capture device includes a pair of sandwiches and a case.
At least one sandwich is a roller,
The roller is provided with a rotatable outer cylinder on the outer circumference of the inner cylinder.
The inner cylinder is provided with a rotation mechanism whose axis is not the axis of the outer cylinder.
A cord movement capturing device characterized in that the pair of sandwiched bodies are sandwiched during braking by the operation of the rotating mechanism. A code movement capture device that cooperates with a braking device that brakes a code that moves with the automatic operation of the cloaking device.
The cord movement capture device includes a pair of interlocking bodies.
A cord movement capturing device including a plate, a string-shaped member, or a link mechanism that keeps the sandwiched body in constant contact with the cord, and activates the pair of sandwiched bodies so as to be sandwiched during braking. A braking device that brakes the cord that moves with the automatic operation of the cloaking device.
The braking device is provided with a cord movement capturing device.
The cord movement capture device includes a pair of interlocking bodies.
A braking device including a damper that generates a propulsive force in a direction in which the pair of sandwiching bodies are sandwiched during braking.