JP6895738B2 - Cloaking device - Google Patents

Description

The present invention relates to a braking device for braking the movement of a cord and a shielding device including the braking device.

Conventionally, shielding devices such as horizontal blinds, raised curtains, pleated screens, roll-up screens, vertical blinds, curtain rails, accordion curtains, vertical pleated screens, vertical roll screens, and panel curtains have been put into practical use. Of these, the shielding device that opens and closes the shielding member up and down or left and right with respect to the opening by pulling the cord, is provided with a braking device that slows down the movement of the cord, and reduces the momentum of opening and closing the shielding member. There is something that can be done. For example, Patent Document 1 discloses a braking device (brake device) in which a movable pulley and a fixed pulley form a pair of sandwiching bodies, and the movable pulley approaches the fixed pulley to suppress the moving speed of the cord. ..

Japanese Unexamined Patent Publication No. 10-140950

However, in the shielding device as described in Cited Document 1 above, a braking force is always applied to the cord, and when the shielding member is desired to be opened and closed quickly, the braking device has been an obstacle.

The present invention has been made in view of such circumstances, and provides a braking device that does not interfere with the operation of the user.

According to the present invention, it is a braking device that brakes the movement of the cord in the longitudinal direction, and has a braking state in which the cord is braked and a non-braking state in which the cord is not braked with respect to the movement of the cord in the same direction. Braking devices that are configured to be switchable are provided.

In the present invention, the braking device is configured so that the braking state and the non-braking state can be switched with respect to the movement of the cord in the same direction. Therefore, for example, when this braking device is used as a shielding device, the momentum of opening and closing the shielding member can be reduced by putting the braking device in the braking state, and by putting the braking device in the non-braking state, The user can quickly open and close the shielding member without disturbing the operation.

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

Preferably, a rotating member that can rotate by moving the cord in the longitudinal direction and a resistance-imparting portion that imparts rotational resistance to the rotating member are further provided, and in the braking state, the resistance-imparting portion is used in the longitudinal direction of the cord. The movement is configured to be dampened.

Preferably, the rotating member and the opposing member facing the rotating member constitute a sandwiching body that sandwiches the cord, and when the sandwiching body sandwiches the cord, the braking state is established. If the sandwiching body does not sandwich the cord, the non-braking state is obtained.

Preferably, a holding member for holding at least one of the rotating member and the opposing member is provided, and the at least one is configured to move with the movement of the holding member, and the holding member is configured to move with the movement of the holding member. It is configured to move between the pinching position where the opposing member sandwiches the cord and the non-pinching position where the rotating member and the opposing member do not sandwich the cord.

Preferably, the holding member is provided with an urging means for urging the holding member, and the holding member is moved to the pinching position by being urged by the urging means.

Preferably, the holding member moves in the urging direction of the urging means with the movement of the cord in one direction along the longitudinal direction, and the rotation of at least one of the rotating member and the opposing member imparts the resistance. The holding member moves against the urging of the urging means with the movement of the cord in the other direction along the longitudinal direction of the cord, so that the rotation of at least one of the sandwiching members is said to be the same. The transmission to the resistance imparting part is released.

Preferably, a restraining means for restraining the holding member to the non-pinching position is provided.

Preferably, the restraining means is a restraining lever that engages with the holding member and restricts the movement of the holding member to the sandwiching position.

Preferably, the restraining means is a restraining cord that regulates the movement of the holding member to the pinching position by pulling the holding member in a direction of moving the holding member from the pinching position to the non-pinching position.

Preferably, the resistance imparting portion includes a rotation transmission member that rotates with the rotation of the rotation member and a rotation resistance body that can rotate by engaging with the rotation transmission member, and the rotation resistance body rotates. It is configured to be movable outward in the radial direction by the centrifugal force generated along with it, and to generate rotational resistance by friction between the wall surface formed on the outer side in the radial direction, and the rotation transmission member and the rotation resistor body. When the engagement of the cord is disengaged, the rotational resistance to the rotating member is reduced, and the movement of the cord in the longitudinal direction is not dampened by the resistance applying portion, resulting in a non-braking state.

Preferably, a case is provided that covers at least a part of the holding member, and the case has a first engaging portion that engages with the engaged portion of the holding member, and the engaged portion is engaged with the engaged portion. The holding member is fixed to the non-pinching position by engaging with the portion.

Further, according to the present invention, there is provided a shielding device including the braking device and a shielding member that opens and closes with the movement of the cord.

It is a front view which shows the shielding device which concerns on 1st Embodiment of this invention. It is an exploded perspective view of the braking device of the shielding device of FIG. 2 is an assembly view of the braking device of FIG. 2, where FIG. 2A is a front perspective view, FIG. 2B is a rear perspective view, and FIG. 2C is a left side view. 2 is an assembly view of the braking device of FIG. 2, where FIG. 2A is a plan view and FIG. 2B is a bottom view. 2 is a view showing the case of the braking device of FIG. 2, where FIG. 2A is a front perspective view and FIG. 2B is a rear perspective view. It is an assembly drawing which removed the alignment member and a case from the braking device shown in FIG. 3, (a) is a front perspective view, and (b) is a rear perspective view. FIG. 5 is an exploded perspective view of a portion above the collar portion of the case shown in FIG. 5, a slider, and a coil spring as viewed from the back side. It is an assembly drawing which further removed the slider from FIG. 6, (a) is a front perspective view, (b) is a rear perspective view. FIG. 3C is a cross-sectional view taken along the line AA of FIG. 3 (c). FIG. 4A is a cross-sectional view taken along the line BB of FIG. 4A. 9A and 9B are views showing how the braking device of FIG. 2 brakes the elevating cord. FIG. 9A shows a state in which no tension is applied to the elevating cord (steady state), and FIG. 9B shows tension on the elevating cord. Is given, and the elevating cord is sandwiched between the sandwiched bodies (sandwiched state), and (c) is a diagram summarizing the rotation directions of each member when the state changes from (a) to (b). .. It is a schematic diagram which shows the operation of the braking device of FIG. It is explanatory drawing which shows the operation of the restraint lever which restrains the slider of the braking device of FIG. 2 in a non-jamming position, (a) shows the state which a slider is in a braking position, and (b) shows the state which is in a non-braking position. .. It is explanatory drawing which shows the operation of the restraint cord which restrains the slider of the braking device which concerns on 2nd Embodiment of this invention to a non-jamming position, (a) is a state which a slider is in a braking position, (b) is a non-braking. Indicates the state of being in position. 14 is a diagram showing a state in which the restraint cord of FIG. 14 is pulled out from the head box, FIG. 14A is a diagram corresponding to FIG. 14A, and FIG. 14B is a diagram corresponding to FIG. 14B. It is a figure which shows the braking device of the shielding device which concerns on 3rd Embodiment of this invention, (a) is the state which the weight is engaged with the weight holder with the sun gear, (b) is the engagement of the weight and the weight holder with the sun gear. Indicates a state in which the case is released. It is a perspective view which shows typically the braking device of the shielding device which concerns on 4th Embodiment of this invention. It is explanatory drawing which shows the operation of the braking device of FIG. 17, (a) shows a braking state, (b) shows a non-braking state.

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

1 First Embodiment 1-1 Overall Configuration As shown in the front view of FIG. 1, the shielding device 100 according to the first embodiment has a plurality of stages of slats 103 from a head box 101 via a plurality of ladder cords 102. It is suspended and supported, and a bottom rail 103a is suspended and supported at the lower end of the ladder cord 102. Hereinafter, the slat 103 and the bottom rail 103a are collectively referred to as a shielding member 103. Further, in FIG. 1, the front-back direction of the drawing is the front-back direction, and the left-right direction is the width direction.

A plurality of support members 110 are arranged in the head box 101, and the tilt drum 104 is rotatably supported by the support members. The upper end of the ladder cord 102 is attached to the tilt drum 104, and the shaft 105 extending in the longitudinal direction of the head box 101 is fitted into all the tilt drums 104 at the center of the tilt drum 104. Therefore, when the shaft 105 is rotated, all the tilt drums 104 are rotated, and one of the warp threads of the ladder cord 102 is pulled up with the rotation of the tilt drum 104, so that each slat 103 and the bottom rail 103a are moved. The angle is adjusted in the same phase.

An operation rod 106 made of a tubular body is suspended and supported at one end of the head box 101, and an operation portion 106a is provided at the lower end of the operation rod 106. Then, when the operation unit 106a is gripped and the operation rod 106 is rotated, the shaft 105 is rotated via the gear mechanism arranged in the head box 101. Therefore, the angle of each shielding member 103 can be adjusted by rotating the operating rod 106.

Further, in the present embodiment, three elevating cord CDs (cords within the scope of claims) are suspended from the head box 101, and one end of each elevating cord CD is attached to the bottom rail 103a.

In addition, as shown in FIG. 12, the support member 110 described above is pivotally supported by a guide pulley 109 that guides three elevating cord CDs into the head box 101, and is introduced into the head box 101. The code CD can be turned and guided in the width direction of the head box (to the right in FIG. 1). Each support member 110 has a space through which another elevating cord CD can pass in the left-right direction.

Then, the elevating cord CD is pulled out from the cord outlet 101a formed on the front surface 101f of the end of the headbox 101 via the lock portion 107 and the braking device 1000 installed in the headbox 101, and is inside the tubular operation rod 106. The tip of the cord equalizer 108 is connected to the cord equalizer 108 provided below the operation unit 106a. Therefore, when the cord equalizer 108 is pulled downward and the elevating cord CD is pulled out from the head box 101, the bottom rail 103a is pulled up, so that each slat 103 is sequentially pulled up.

The lock portion 107 is used to prevent the shielding member 103 from dropping its own weight, and in the present embodiment, a known heart cam stopper is used. Although detailed description is omitted, the lock portion 107 is unlocked when the cord equalizer 108 is pulled downward once from the locked state and released, and the shielding member 103 is lowered. In this state, the cord equalizer 108 is pulled again. When pulled downward, the lifting cord CD is locked to prevent its own weight from dropping.

Further, the braking device 1000 brakes the movement of the elevating cord CD and reduces the momentum of the shielding member descending. Hereinafter, the braking device 1000 will be described in detail with reference to FIGS. 2 to 12.

1-2 Braking device <Structure of braking device>
In the braking device 1000 according to the present embodiment, the motion conversion unit DT that converts the movement of the elevating cord CD into rotational motion and the resistance imparting section RA that imparts rotational resistance to this rotational motion are connected in a substantially vertical direction. Become. In the present embodiment, as shown in the exploded perspective view of FIG. 2, the tension transmission roller 30 as a rotating member including the slider 20, the coil spring SP, the shaft 31, and the roller portion 32 is arranged above and below the roller portion 32. An idle roller 40 as an opposing member composed of a ring-shaped member 33, 34, a shaft 41, and a roller portion 42, a carrier with internal teeth 260, a planetary gear 280, and a part of the case 10A form a motion conversion unit DT, and a rotation resistor is formed. The weight 340, the weight holder 320 with the sun gear as the rotation transmission member, the base 70, and a part of the case 10A constitute the resistance imparting portion RA. Further, in the present embodiment, the tension transmission roller 30 and the idle roller 40 form a sandwiching body for sandwiching the elevating cord CD, and the sandwiching body is held by the slider 20 as a holding member. In addition, as shown in FIGS. 2 and 13, the braking device 1000 of the present embodiment also includes a restraining lever 60 as a restraining means for restraining the movement of the slider 20. Hereinafter, each member will be described. In the description of the braking device 1000, the directions of the arrows shown in FIG. 3A are front-back, left-right, and up-down, respectively. That is, the direction in which the elevating cord CD extends is the front-rear direction, and more specifically, the direction in which the distance between the first top wall groove 16 and the second top wall groove 17, which will be described later, becomes narrower is the front direction, and the left-right direction (corresponding to this). Width direction), determine the vertical direction.

As shown in FIGS. 2A and 2B, the alignment member 200 inserts a plurality of elevating cord CDs and aligns the plurality of elevating cord CDs in the same direction with each other. The aligning member 200 can be formed of, for example, a resin such as plastic.

The alignment member 200 has a configuration in which two substantially rectangular insertion portions 201 for inserting the elevating cord CD are formed in front of and behind the substantially rectangular parallelepiped frame 200a penetrating in the vertical direction. By passing the three elevating cord CDs through the insertion portion 201 and the upper part of the insertion portion 201, the elevating cord CDs are sandwiched between the sandwiching bodies in a state of being aligned at substantially equal intervals in the vertical direction. Become. Further, as shown in FIG. 3, a rectangular through hole 210 through which the restraint lever 60 is passed is formed on the left side surface of the alignment member 200.

Next, the case 10A will be described with reference to FIGS. 2 to 5. The case 10A constitutes a housing together with the base 70, and contains a slider 20, a coil spring SP, a tension transmission roller 30 including a shaft 31 and a roller portion 32, ring-shaped members 33, 34, a shaft 41, and a roller portion 42. Holds an idle roller 40, a pinion gear 50, a carrier 260 with internal teeth, a planetary gear 280, a plate 300, a weight holder 320 with a sun gear, and a weight 340.

As shown in FIGS. 5A and 5B, the case 10A has a top wall portion 11 having a substantially square outer shape, a front side wall portion 12f extending downward from the front, rear, left and right ends of the top wall portion 11, and a right side. The wall portion 12r, the left side wall portion 12l, the rear side wall portion 12b (these are collectively referred to as the side wall portion 12), and the flange portion 13 facing the top wall portion 11 and extending radially from the side wall portion 12. The main configuration is a cylindrical portion 13C connected to the flange portion 13 and a cover portion 112 connected to the cylindrical portion 13C.

Guide grooves 113 are formed in the front side wall portion 12f and the rear side wall portion 12b, respectively. These two guide grooves 113 face each other in the front-rear direction. These guide grooves 113 are grooves for inserting the elevating cord CD in the front-rear direction, and in the present embodiment, three elevating cord CDs are inserted in the vertical direction (see FIG. 3).

Further, a support groove 114 is provided above the right side wall portion 12r and the left side wall portion 12l. As shown in FIG. 2, the support groove 114 supports the protrusion 230 provided on the slider 20 when the case 10A holds the slider 20 inside. As a result, the slider 20 described later can be supported with its bottom floating. In addition, a rectangular through hole 12h through which the restraint lever 60 is passed is formed in the front portion of the left side wall portion 12l. The through hole 12h is provided at a position corresponding to the through hole 210 of the alignment member 200, and when the alignment member 200 is attached to the case 10A, the through hole 210 and the through hole 12h communicate with each other. ..

As shown in FIGS. 4A and 5, the top wall portion 11 is formed with a first top wall groove 16 and a second top wall groove 17. The first top wall groove 16 and the second top wall groove 17 are formed obliquely with respect to the longitudinal direction of the elevating cord CD, that is, the front-rear direction, respectively, and as they go forward, which is one longitudinal direction of the elevating cord CD, The distance between the first top wall groove 16 and the second top wall groove 17 is reduced.

Specifically, the first top wall groove 16 is formed in an arc shape, and the arc of the first top wall groove 16 is the inner peripheral surface (internal gear) of the carrier 260 with internal teeth shown in FIGS. 6 and 11. It is formed so as to be concentric with 261) in a plan view (see FIG. 4 (a)). On the other hand, the second top wall groove 17 is formed in a shape that draws a gentle curve, has a substantially linear shape on the front side, and is curved in a direction away from the first top wall groove 16 toward the rear (). See FIG. 4 (a)). This is because when the second top wall groove 17 is made substantially linear, the first top wall groove 16 is an arc that approaches the elevating cord CD from the rear to the front, so that, for example, the shaft 31 and the shaft 41 are respectively. This is to prevent the vertical displacement of the elevating cord CD from being different between the shaft 31 and the shaft 41 when moving along the first top wall groove 16 and the second top wall groove 17.

By making the displacements of the shaft 31 and the shaft 41 with respect to the vertical direction close to each other in this way, the roller portion 32 and the roller portion 42 can appropriately sandwich the elevating cord CD.

As shown in FIGS. 4A and 5, the edge of the first top wall groove 16 is located along the outer edge of the case 10A in the first top wall groove 16 in the plan view of the case 10A. At least a part of the first guide wall 16A is provided so as to project substantially vertically upward from the first top wall groove 16. The purpose of the first guide wall 16A is to reduce the surface pressure of the shaft 31 moving along the first top wall groove 16, and it is possible to prevent the case 10A from being scraped by the pressure from the shaft 31. ing.

Further, at least a part of the position along the outer edge of the case 10A in the second top wall groove 17, a second guide wall 17A protruding upward from the second top wall groove 17 substantially vertically is provided. Provided. Then, the surface pressure of the shaft 41 can be reduced by the second guide wall 17A, which makes it possible to prevent the case 10A from being scraped by the pressure from the shaft 41.

As shown in FIG. 5, the flange portion 13 and the cylindrical portion 13C are formed below the side wall portion 12, and internally have a pinion gear 50, a carrier with internal teeth 260, a planetary gear 280, a weight holder 320 with a sun gear, and a weight 340. Is placed. The cylindrical portion 13C has a substantially cylindrical shape, and a ring-shaped inner peripheral gear 115 (see FIG. 9) that meshes with the planetary gear 280 is formed on the inner surface thereof.

The cover portion 112 is a portion connected to the cylindrical portion 13C and fitted with the base 70. In the first embodiment, the outer edge of the cover portion 112 is a substantially square shape.

As shown in FIGS. 6 and 7, the slider 20 holds the tension transmission roller 30 and the idle roller 40 inside, and moves together with the tension transmission roller 30 and the idle roller 40 along the support groove 114 of the case 10A. It is configured to (slide). The slider 20 has a top wall portion 21, a rear side wall portion 22, a front side wall portion 24, and a bottom wall portion 23. Further, the top wall portion 21 is formed with a pair of grooves, the first top wall groove 26 and the second top wall groove 27, and the bottom wall portion 23 is formed with the first bottom wall groove at a position facing them in the vertical direction. 28 and a second bottom wall groove 29 are formed. The width of the first top wall groove 26 and the first bottom wall groove 28 is large enough to accommodate the diameter of the shaft 31, and the width of the second top wall groove 27 and the second bottom wall groove 29 is large. The diameter is large enough to accommodate the shaft 41.

Further, the top wall portion 21 is provided with protrusions 230 at its four corners so as to project to the left and right of the top wall portion 21. The protrusion 230 is housed in the support groove 114 of the case 10A in the assembled state, and supports the slider 20 in a floating state inside the case 10A. That is, since the slider 20 is held in a non-contact state with the carrier 260 with internal teeth located below, the resistance force due to contact between the slider 20 and the carrier 260 with internal teeth can be reduced.

Through holes 25 are formed in the front side wall portion 24 and the rear side wall portion 22, respectively. The through hole 25 penetrates the front side wall portion 24 and the rear side wall portion 22 in the front-rear direction at substantially the center in the width direction of the front side wall portion 24 and the rear side wall portion 22, and has a substantially oval shape long in the vertical direction. The shape is such that the lifting cord CDs of the books can be inserted in a vertically aligned state.

Further, as shown in FIG. 6B, the rear side wall portion 22 is formed with recesses 231 formed from the outer surface of the rear side wall portion 22 on both sides of the through hole 25, and the recesses 231 are inside the recesses 231. The coil spring SP is arranged. One end of the coil spring SP projects from the recess 231. In FIG. 6B, the portion protruding from the recess 231 of the coil spring SP is omitted.

As shown in FIG. 7, the size of the slider 20 having such a shape in the left-right direction is substantially the same as the distance between the inner walls in the width direction of the case 10A, and the size of the slider 20 in the front-rear direction is the case. It is made smaller than the distance between the inner walls in the front-rear direction of 10A. Therefore, when the slider 20 is arranged in the space of the case 10A, the side surfaces of the top wall portion 21 and the bottom wall portion 23 of the slider 20 abut on the inner wall surface in the width direction of the case 10A, and the slider 20 is brought into the case 10A. On the other hand, movement is regulated in the width direction. In this state, since the guide groove 113 of the case 10A and the through hole 25 of the slider 20 are lined up in the front-rear direction, the elevating cord CD can be inserted into the slider 20. On the other hand, with the slider 20 arranged in the space of the case 10A, a gap is generated in the front-rear direction between the slider 20 and the inner wall surface 14d in front of the case 10A and the inner wall surface 15d in the rear, and the slider 20 It can move in the front-back direction with respect to the case 10A. Further, with the slider 20 arranged in the space of the case 10A, the coil spring SP protruding from the recess 231 of the rear side wall portion 22 of the slider 20 presses the inner wall surface 15d of the rear side wall portion 12b of the case 10A. Therefore, with the slider 20 arranged in the space of the case 10A, the slider 20 is located on the front side and is pressed forward in the case 10A. As described above, the braking device 1000 of the present embodiment is provided with a through hole 12h in front of the left side wall portion 12l of the case 10A, and the restraint lever 60 is the inner wall surface in front of the slider 20 and the case 10A. It is designed to be inserted in the space between 14d. The operation of the restraint lever 60 will be described later.

Next, using FIGS. 2, 6, 8 and 10, the tension transmission roller 30, which is one of the pair of sandwiching members, the idle roller 40, which is the other of the pair of sandwiching members, and the pinion gear 50. explain.

The tension transmission roller 30 has a shaft 31 and a cylindrical roller portion 32 that covers the outer peripheral surface of the shaft 31. The roller portion 32 is attached to one end side of the shaft 31, and a pinion gear 50 is inserted into the other end of the shaft 31. The roller portion 32 is preferably formed of an elastic body, and is preferably made of urethane rubber (PUR), for example. Since the roller portion 32 is an elastic body, it is possible to prevent the lifting cord CD from being worn. Further, when a plurality of elevating cord CDs are sandwiched, even if there is a dimensional error in the diameter of the elevating cord CDs, the difference in the sandwiching force for each elevating cord CD can be reduced.

The pinion gear 50 is attached to the shaft 31 by press fitting, and rotates around the shaft 31 together with the tension transmission roller 30. Further, the pinion gear 50 and the tension transmission roller 30 are separated to such an extent that the bottom wall portion 23 of the slider 20 can intervene. Although not particularly shown, a washer or the like for reducing friction may be interposed between the pinion gear 50 and the bottom wall portion 23 of the slider 20.

On the other hand, the idle roller 40 has a shaft 41 parallel to the shaft 31 of the tension transmission roller 30, and a roller portion 42 that covers the outer peripheral surface of the shaft 41. Therefore, the rotation axis of the tension transmission roller 30 and the rotation axis of the idle roller 40 are parallel to each other. The outer diameter of the roller portion 42 of the idle roller 40 is larger than the outer diameter of the roller portion 32 of the tension transmission roller 30. In the present embodiment, the outer peripheral surface of the roller portion 42 of the idle roller 40 is made of resin, and the friction coefficient is higher than that of the flat surface of metal. Further, both ends of the shaft 41 are exposed from the roller portion 42. The roller portion 42 of the idle roller 40 may also be formed of an elastic body such as urethane rubber (PUR), like the roller portion 32 of the tension transmission roller 30.

As shown in FIG. 10, the roller portion 32 of the tension transmission roller 30 and the roller portion 42 of the idle roller 40 are held inside the slider 20, and the pinion gear 50 is held outside the slider 20. That is, when the braking device 1000 is assembled, the roller portion 32 and the pinion gear 50 are configured to sandwich the bottom wall portion 23 of the slider 20.

In addition, as shown in FIGS. 2 and 10, the shaft 31 is located between the lower surface of the top wall portion 21 of the slider 20 and the upper surface of the roller portion 32, and between the upper surface of the bottom wall portion 23 and the lower surface of the roller portion 32, respectively. The ring-shaped members 33 and 34 passed through the are arranged. The ring-shaped members 33 and 34 are thin and thin to reduce friction between the roller portion 32 and the slider 20 when the tension transmission roller 30 (roller portion 32) rotates and moves relative to the slider 20. It is a member. The ring-shaped members 33 and 34 are preferably made of a material that is more slippery than the roller portion 32, and is preferably made of a material having a hardness higher than that of the roller portion 32. Similar ring-shaped members may be provided on both sides of the roller portion 42 of the idle roller 40 in the axial direction.

Next, the carrier 260 with internal teeth and the planetary gear 280 will be described with reference to FIGS. 2, 8 and 9. As shown in FIG. 2, in the first embodiment, the carrier 260 with internal teeth has a substantially donut shape in a plan view. The carrier 260 with internal teeth includes a flange 262 that projects outward from the cylindrical portion 264 in a plan view.

As shown in FIGS. 8 and 9, an internal gear 261 that meshes with the pinion gear 50 is formed on the inner peripheral surface of the cylindrical portion 264. Then, the flange 262 is formed with a support shaft 263 that projects downward in the vertical direction (see FIG. 2). The support shafts 263 are preferably at equal intervals, and in the present embodiment, four support shafts 263 are provided at equal intervals.

Then, as shown in FIG. 9, the planetary gears 280 are rotatably supported on the support shafts 263, respectively. The planetary gear 280 meshes with the sun gear 323, which will be described later, and the inner peripheral gear 115 provided inside the case 10A. Then, it is possible to revolve around the central portion of the internal gear 261. Therefore, the rotation of the pinion gear 50 is transmitted to the internal gear 261 to rotate the carrier with internal teeth 260, and the carrier 260 with internal teeth is rotatably supported by the support shaft 263 provided on the flange 262 of the carrier 260 with internal teeth. The rotation of the planetary gear 280 makes it possible to accelerate the rotation caused by the pinion gear 50.

Next, the weight holder 320 with the sun gear and the weight 340 will be described with reference to FIGS. 2, 9 and 10. As shown in FIG. 2, the weight holder 320 with a sun gear is formed with convex portions 321 and concave portions 322 arranged alternately toward the outside of the ring-shaped ring portion 324. As shown in FIG. 9, a sun gear 323 meshing with the planetary gear 280 is provided on the outer outer peripheral surface of the ring portion 324 so that the rotation axis faces substantially perpendicular to the extending direction of the convex portion 321. Be done. Then, a weight 340 is arranged in each recess 322. That is, it can be said that the weight holder 320 with the sun gear is a member that holds the weight 340 in each of the concave portions 322 with the convex portion 321 as a boundary when the braking device 1000 is assembled. The number of weights 340 is arbitrary, but it is preferable that the weights are evenly spaced from the viewpoint of balance during rotation. In the first embodiment, eight weights 340 are used as an example. Therefore, eight convex portions 321 and eight concave portions 322 are also provided.

Further, as shown in FIG. 10, each weight 340 is provided with a protrusion 341 on the base 70 side. The protrusion 341 makes it possible to reduce the resistance at the time of contact with the base 70. The number of protrusions 341 is arbitrary, but in the first embodiment, four protrusions 341 are provided as an example.

During rotation caused by the pinion gear 50, the weight 340 moves in a direction away from the center of the internal gear 261 due to centrifugal force, and abuts on the inner peripheral wall of the case 10A to provide resistance as a centrifugal brake to rotation. It is to be given. Therefore, the resistance-imparting portion RA is formed by the inner peripheral wall of the case 10A, the weight holder 320 with the sun gear, and the weight 340. Then, in the present embodiment, the motion conversion unit DT and the resistance imparting unit RA are provided so as to be positioned substantially vertically.

When assembling the braking device 1000, the carrier 260 with internal teeth and the weight holder 320 with sun gears are assembled via the plate 300 shown in FIG. Specifically, the cylindrical portion 264 of the carrier 260 with internal teeth is assembled so as to be inserted into the ring portion 324 of the weight holder 320 with a sun gear. Therefore, the diameter of the cylindrical portion 264 is designed to be slightly smaller than the diameter of the ring portion 324. The plate 300 has a function of preventing the planetary gear 280 from tilting and preventing interference between the planetary gear 280 and the weight 340.

Next, the base 70 will be described with reference to FIGS. 2, 4 (b) and 6. As shown in FIG. 1, at substantially the center of the base 70, a cylindrical portion 708 that is bulkier than the surroundings and has a concave lower side is provided. Further, as shown in FIG. 3B, a first base groove 706, a first guide wall 706A, a second base groove 707, and a second guide wall 707A are provided on the upper surface of the cylindrical portion 708.

The first base groove 706 and the first guide wall 706A correspond to the first top wall groove 16 and the first guide wall 16A provided in the case 10A, respectively, and the lower ends of the shaft 31 are the first base groove 706 and the first guide wall 706A. It comes into contact with the first guide wall 706A formed on the edge thereof. Similarly, the second base groove 707 and the second guide wall 707A correspond to the second top wall groove 17 and the second guide wall 17A provided in the case 10A, respectively, and the lower ends of the shaft 41 correspond to the second base groove 707 and the second guide wall 707A, respectively. It comes into contact with the second guide wall 707A formed on the edge thereof.

By denting the lower side by providing a cylindrical portion 708 or the like in this way, it is possible to prevent the lower ends of the shaft 31 and the shaft 41 from coming into contact with the mounting surface on which the braking device 1000 is mounted. The lower end of the shaft 41 can be appropriately inserted (see FIG. 10).

Further, as shown in FIG. 3B, a mounting cylinder 702 used when arranging the braking device 1000 in the head box 101 is provided on the outside of the bottom surface of the base 70. Then, by fitting the mounting cylinder 702 into the upwardly projecting mounting shaft provided on the bottom surface of the head box 101, the braking device 1000 can be stably arranged in the head box.

1-3 Assembly of the braking device Next, the state in which the braking device 1000 is assembled will be described with reference to FIGS. 2 and 3. FIG. 3 is an assembly drawing of the braking device 1000 configured by combining the above-mentioned members. As shown in FIG. 2, such assembly is performed in a state where the central axes of the members are overlapped in the vertical direction.

Specifically, the carrier 260 with internal teeth and the weight holder 320 with a sun gear holding the weight 340 are assembled via the plate 300. At this time, the planetary gear 280 provided on the carrier 260 with internal teeth and the sun gear 323 provided on the weight holder 320 with sun gears are made to mesh with each other.

Then, the shaft 31 is slid horizontally in the first top wall groove 26 and the first bottom wall groove 28 of the slider 20, and the roller portion 32 is housed in the slider 20. At this time, ring-shaped members 33 and 34 are arranged above and below the roller portion 32 as described above. At this time, the pinion gear 50 is positioned outside the slider 20. Further, the shaft 41 is moved horizontally to the second top wall groove 27 and the second bottom wall groove 29, and the roller portion 42 is housed inside the slider 20. Then, the slider 20 and the carrier 260 with internal teeth are moved relative to each other so that the internal gear 261 and the pinion gear 50 provided on the carrier 260 with internal teeth mesh with each other.

After that, the base 70 is arranged under these members, and the case 10A is covered from above. Here, in order to assemble the slider 20 in the case 10A, as shown in FIG. 7, the slider 20 is arranged so as to be located below the inside of the case 10A, and the slider 20 is relatively moved in the vertical direction so as to approach each other. Let me. Then, the protrusion 230 provided on the slider 20 is passed through the groove 118 provided inside the case 10A. Then, as shown in FIG. 5, the case 10A and the slider 20 are brought close to each other until the protrusion 230 reaches the support groove 114. Then, the coil spring SP provided on the slider 20 comes into contact with the inner wall surface 15d behind the case 10A, and the slider 20 is urged forward so that the protrusion 230 is located in front of the groove 118. Therefore, once the slider 20 is attached to the case 10A, it is possible to prevent the protrusion 230 from coming off the support groove 114. Then, the first engaging groove 111A and the second engaging groove 111B provided in the case 10A and the first engaging plate portion 701A and the second engaging plate portion 701B provided in the base 70 are engaged with each other (FIG. 3). (See), the case 10A and the base 70 are fixed, and finally, the alignment member 200 is covered from above the housing composed of the case 10A and the base 70. The alignment member 200 can be fixed, for example, by engaging a claw portion provided on the alignment member 200 with an engagement hole (not shown) provided on the case 10A.

The braking device 1000 assembled in this way is shown in FIG. Then, after the assembly of the braking device 1000 is completed, three elevating cord CDs are placed in front of and behind the insertion portion 201 and the insertion portion 201 of the alignment member 200, the guide grooves 113 provided in front of and behind the case 10A, and the slider 20. It is passed through the provided through hole 25. As a result, the states shown in FIGS. 3 (a) and 3 (b) are obtained.

FIG. 3C is a left side view of the braking device 1000, that is, a side view seen from the arrow X direction of FIG. 3A. As shown in FIG. 3C, in the braking device 1000, the case 10A, the alignment member 200, and the base 70 can be visually recognized from above in the side view. Further, it can be seen that the protrusion 230 is supported by the support groove 114.

Further, as shown in FIGS. 3 (a), 3 (b) and 4 (a), the upper ends of the shaft 31 and the shaft 41 are provided in the case 10A from the first top wall groove 26 provided in the slider 20. The first top wall groove 16 is inserted and exposed to the outside of the case 10A. Similarly, the upper end of the shaft 41 is exposed to the outside of the case 10A by inserting the second top wall groove 17 provided in the case 10A through the second top wall groove 27 provided in the slider 20. Since the shafts 31 and 41 are exposed to the outside of the case 10A in this way, these shafts can be easily moved. Therefore, even when the tension transmission roller 30 and the idle roller 40, which are a pair of sandwiching members, are urged in a direction close to the elevating cord CD, the elevating cord CD can be easily inserted.

Further, as shown in FIG. 4B, in the bottom view of the base 70, the lower end of the shaft 31 inserted through the first base groove 706 and the lower end of the shaft 41 inserted through the second base groove 707. Can be visually recognized. The surface on which the mounting cylinder 702 is provided may be configured such that the lower ends of the shaft 31 and the shaft 41 are covered from the outside by covering the top of the cylindrical portion 708 with a surface.

1-4 Arrangement of the braking device As shown in FIG. 1, the braking device 1000 described above is arranged so as to be sandwiched between the mounting surface in the head box 101 and the shaft 105. That is, the sliders 20 and F30, 40 of the braking device 1000 move in the horizontal direction (horizontal direction in FIG. 1) in the headbox 101, and the rotation axis of the planetary gear 280 faces in the vertical direction in the headbox 101. Arranged like this. At this time, the front-rear direction (horizontal direction in the figure) of the braking device 1000 is such that when the cord equalizer 108 is pulled and the shielding member 103 is pulled up, the lifting cord CD is released from being sandwiched, the cord equalizer 108 is released, and the shielding member 103 is released. Is oriented so that the lifting cord CD is sandwiched when the vehicle is lowered by its own weight. Further, as shown in FIGS. 1 and 12, the lock portion 107 is arranged in front of the braking device 1000 (on the left side in the drawing).

1-5 Operation of the braking device Next, the operation of the braking device 1000 according to the first embodiment will be described with reference to FIGS. 11 and 12. FIG. 11 (a) shows a state in which the elevating cord CD is not moving and no tension is applied to the elevating cord CD (steady state), and FIG. 11 (b) shows a state in which tension is applied to the elevating cord CD and the roller portion 32 and the roller portion 32 and A state in which the elevating cord CD is sandwiched between the roller portions 42 (sandwiched state), FIG. 11 (c) summarizes the rotation directions of each member when the state changes from FIG. 11 (a) to FIG. 11 (b). It is a figure. 11 (a) and 11 (b) are both cross-sectional views taken along the line AA of FIG. 3 (c), as in FIG. 9. Here, for convenience of explanation, the outer circumference of the roller portion 42, which does not appear in the cross-sectional view, is displayed on the periphery of the shaft 41, and the outer circumference of the roller portion 32 is displayed on the periphery of the shaft 31.

In the steady state, the coil spring SP abuts on the inner wall behind the case 10A and presses the slider 20 forward, as described above. Therefore, the slider 20 is located in front of the case 10A as shown in the schematic view of FIG. 12A. Therefore, the position is regulated by the shaft 31 whose position is regulated by the first top wall groove 26 and the first bottom wall groove 28 of the slider 20, and the position is regulated by the second top wall groove 27 and the second bottom wall groove 29. The shaft 41 and the shaft 41 move forward together with the slider 20. Further, the first top wall groove 16 and the second top wall groove 17 provided in the case 10A held on the upper part of the slider 20 are closer to each other toward the front. Similarly, the distance between the first base groove 706 and the second base groove 707 provided in the base 70 decreases toward the front. Therefore, the distance between the roller portion 42 rotatably supported by the shaft 41 and the roller portion 32 rotatably supported by the shaft 31 is also reduced. Further, as shown in FIG. 11, since the first top wall groove 16 and the first base groove 706 are formed concentrically with the center point of the inner peripheral surface of the carrier 260 with internal teeth in a plan view, the shaft 31 is formed. Even when moving in each groove, the pinion gear 50 can continue to mesh with the internal gear 261 provided on the carrier 260 with internal teeth.

As described above, when the distance between the roller portion 32 and the roller portion 42 becomes smaller, the roller portion 32 is pressed by the roller portion 42, and the elevating cord CD is narrowed between the roller portion 32 and the roller portion 42.

Then, it is assumed that in the braking device 1000 in the steady state, tension is applied to the elevating cord CD in the direction (forward) of the arrow D1. Then, the roller portion 32 rotates counterclockwise and the roller portion 42 rotates clockwise due to the frictional force generated between the elevating cord and the CD. That is, the tension transmission roller 30 provided with the roller portion 32 and the idle roller 40 provided with the roller portion 42 come into contact with the elevating cord CD extending linearly, so that the elevating cord CD can be rotated by moving in the longitudinal direction. It can be said that. Then, due to the rotation of the roller portion 32, the pinion gear 50 that shares and is fixed to the same shaft 31 also rotates (rotates) in the same direction (counterclockwise) as the roller portion 32. At this time, as shown in FIG. 12B, the shaft 31 and the shaft 41 move forward in a plan view, and the pinching guide slope 16a and the second top wall groove of the first top wall groove 16 of the case 10A By being guided to the pinching guide slope 17a of 17, the roller portion 32 and the roller portion 42 approach each other in the left-right direction, and the pinching force of the elevating cord CD by the roller portion 32 and the roller portion 42 becomes stronger. 32 will surely rotate.

Then, when the roller portion 32 and the pinion gear 50 connected to the roller portion 32 rotate, the pinion gear 50 meshes with the internal gear 261 as shown in FIG. 11, so that the force given from the teeth of the pinion gear 50 is applied. As a result, the internal gear 261 rotates (rotates) counterclockwise. As a result, the carrier 260 with internal teeth also rotates (rotates) counterclockwise together with the internal gear 261. Therefore, the planetary gear 280 provided on the carrier 260 with internal teeth also rotates (revolves) counterclockwise. Here, since the planetary gear 280 meshes with the sun gear 323 and the inner peripheral gear 115 fixed by the case 10A, it revolves counterclockwise while rotating in the direction opposite to the revolution direction (clockwise). Will be done. Therefore, the sun gear 323 that meshes with the planetary gear 280 inside the planetary gear 280 rotates (rotates) in the opposite direction (counterclockwise) to the rotation of the planetary gear 280. At this time, the planetary gear 280 accelerates the rotation of the sun gear 323. As a result, the weight 340 held by the weight holder 320 with the sun gear that rotates together with the sun gear 323 also starts to rotate.

Then, as shown in FIG. 11B, when the roller portion 32 and the roller portion 42 approach the limit, the rotation of the roller portion 32 continues, but the movement of the roller portion 32 along the internal gear 261 is stopped. At this time, the rotation of other members due to the rotation of the roller portion 32 is continued. Then, the weight 340 comes into contact with the inner peripheral wall of the case 10A due to the centrifugal force, so that a resistance force is generated against rotation. That is, as the moving speed of the elevating cord CD increases, the rotation speed increases, which increases the centrifugal force. Then, as the centrifugal force increases, the weight 340 comes into contact with the inner peripheral wall of the case 10A more strongly, and the resistance force increases. As a result, the moving speed of the elevating cord CD can be suppressed, and the falling speed of the shielding member 103 can be suppressed. Here, in FIG. 1, when the shielding member 103 suspended on the elevating cord CD in an ascending / descending manner freely falls, the tension applied to the elevating cord CD, the weight 340, and the resistance force due to the inner peripheral wall of the case 10A are balanced. , The moving speed of the lifting cord CD becomes substantially constant. Therefore, the braking device 1000 makes it possible to slowly lower the shielding member 103.

Regarding the change from the steady state to the pinched state described above, FIG. 11 (c) summarizes the rotation directions of each member (for the pinion gear 50, the front-rear direction and the tightening direction in a plan view are also included). is there.

On the other hand, when tension is applied to the elevating cord CD in the direction opposite to the arrow D1 (rearward), the roller portion 32 and the roller portion 42 rotate in the opposite direction to the above. As a result, the shaft 31 and the shaft 41 are guided by the release guide slope 16b of the first top wall groove 16 and the release guide slope 17b of the second top wall groove 17, and move so as to be separated from each other. Then, the pinching force of the roller portion 32 with respect to the elevating cord CD is weakened, and the elevating cord CD can be pulled with a weak force.

Therefore, when the braking device 1000 is provided in the head box 101 as shown in FIG. 1, the direction in which tension is applied to the elevating cord CD in the front in FIG. 11 is the descending direction of the shielding member 103, and the elevating cord is rearward. It is preferable that the direction in which tension is applied to the CD is the direction in which the shielding member 103 rises. By attaching the braking device 1000 in such a direction, when the shielding member 103 is fully lowered, that is, in the closed state of the shielding device 100, when the cord equalizer 108 is pulled downward, the tension transmission roller 30 and the idle roller 40 are formed. Can be separated and the lifting cord CD can be pulled with a small resistance. On the other hand, when the elevating cord CD is released while the elevating cord CD is not locked by the lock portion 107 when the shielding member 103 is not fully lowered, the shielding member 103 is lowered by its own weight, and the elevating cord CD is the braking device 1000. Is pulled toward the front of the CD, and a braking force is applied to the elevating cord CD as described with reference to FIG. 12 and the like. Therefore, the descending speed of the shielding member 103 is suppressed. Therefore, it is possible to suppress damage or the like due to the descending speed of the shielding member 103 being exceeded.

Next, with reference to FIG. 12, the movement of the slider 20 when the state changes between the steady state and the pinched state will be described. 12 (a) corresponds to FIG. 11 (a), and FIG. 12 (b) corresponds to FIG. 11 (b).

When changing from the steady state of FIG. 12 (a) to the sandwiched state of FIG. 12 (b), the shaft 41 and the roller portion 42, and the shaft 31 and the roller portion 32 are shown in the drawing due to the frictional force between the elevating cord CD and the elevating cord CD. Move in front of. At this time, since the shaft 41 is in contact with the second top wall groove 27 and the second bottom wall groove 29, the second top wall groove 27 and the second bottom wall groove are accompanied by the forward movement of the shaft 41. A force is applied forward to 29. Further, since the shaft 31 is in contact with the first top wall groove 26 and the first bottom wall groove 28, the first top wall groove 26 and the first bottom wall groove 28 are moved as the shaft 31 moves forward. Force is applied forward. Therefore, when the shafts 31 and 41 move forward by Δ, the slider 20 also moves forward by Δ.

1-6 Restraint lever By the way, when the braking device 1000 that performs the above-mentioned operation is used, when lowering the shielding member, that is, when the elevating cord CD moves forward (to the left in FIG. 1), the elevating cord is always used. Braking force is applied to the CD. Therefore, when it is desired to open and close the shielding member quickly, the braking device 1000 becomes an obstacle.

Therefore, in the present embodiment, the restraining lever 60 shown in FIGS. 2 and 13 switches between a state in which the slider 20 is allowed to operate and a state in which the slider 20 is restrained so as not to operate, so that the braking device 1000 raises and lowers the cord CD. It is possible to switch between a braking state in which the brake is applied and a non-braking state in which the lifting cord CD is not braked. The configuration and operation of the restraint lever 60 will be specifically described below.

The restraint lever 60 is formed on the front surface 101f (indoor side surface) of the head box 101 from the outside of the head box 101 in a state where components other than the restraint lever 60 of the braking device 1000 are installed in the head box 101. It is inserted into the through hole 101h, and further inserted into the through hole 210 of the alignment member 200 provided at a position corresponding to the through hole 101h and the through hole 12h of the case 10A (see FIG. 13, however, in FIG. 13, the alignment member 200 Is omitted). The restraint lever 60 has a tapered tip portion 61, and the tip portion 61 is inserted into the space between the inner wall surface 14d in front of the case 10A and the slider 20 through the through hole 12h of the case 10A. (See FIG. 13 (a)). When the restraint lever 60 is further inserted in this state, the inclined surface 61a formed on the slider 20 side of the tip portion 61 presses the slider 20 so that the slider 20 moves rearward (FIG. 13 (FIG. 13). b) See).

Further, the side opposite to the tip portion 61 of the restraint lever 60 is an operation portion 62 exposed from the front surface 101f of the head box 101, and has a snap-fit mechanism 64 having a locking portion 63. Then, when the restraint lever 60 is inserted into the head box 101 from the state of 13 (a) to the state of FIG. 13 (b), the locking portion 63 is locked to the front surface 101f of the head box 101, and the restraint lever 60 is fixed. It is supposed to be done. As a result, the slider 20 is held in the rear position against the urging force of the coil spring SP, and engages with the restraint lever 60 to restrict the forward movement. In the present embodiment, in order to release the fixing, the operation unit 62 may be pinched to release the locking between the locking portion 63 and the front surface 101f of the head box.

With the above configuration, the sandwiching body (tension transmission roller 30, idle roller 40) sandwiches the elevating cord CD at the sandwiching position (see FIG. 13A), and the sandwiching body becomes The position of the slider 20 can be switched between the non-pinching positions (see FIG. 13B) in which the lifting cord CD is not pinched. That is, by inserting the restraint lever 60 and restraining the slider 20 in the non-pinching position, the lifting cord CD is in a non-braking state in which no braking force is applied, and the shielding member 103 can be quickly opened and closed. .. In order to change from this state to a braking state in which a braking force is applied to the elevating cord CD, the operating portion 62 is pinched as described above, the locking portion 63 and the front surface 101f of the head box are released, and the restraint lever 60 is released. Just pull it out. Even when the restraint lever 60 is inserted, the engagement between the protrusion 230 and the support groove 114 is not disengaged, and the slider 20 does not fall through the groove 118 shown in FIG.

The shape of the restraint lever 60 does not have to be the shape described above, and any other shape can be used as long as the operation of the slider 20 can be regulated. Further, the restraint lever 60 may be inserted from the bottom surface, the upper surface, or the rear surface of the head box in addition to the insertion from the front surface 101f of the head box 101.

1-5 Action / Effect The following actions / effects can be obtained by the shielding device 100 according to the first embodiment.
(1) By inserting and removing the restraint lever 60, it is possible to switch between a braking state in which the lifting cord CD is braked and a non-braking state in which the lifting cord CD is not braked in response to the movement of the lifting cord CD in the same direction. Therefore, by putting the braking device 1000 in the non-braking state, the user can quickly open and close the shielding member 103 without hindering the operation.
(2) When tension is applied to the elevating cord CD forward, the elevating cord CD is strongly sandwiched by moving the sandwiching bodies including the tension transmission roller 30 and the idle roller 40 so as to be close to each other. And the resistance of the resistance imparting part can be transmitted to the elevating cord CD. Further, when tension can be applied to the elevating cord CD backward, the sandwiching bodies move so as to be separated from each other to weaken the interlocking force to the elevating cord CD and allow the elevating cord CD to move freely. be able to.
(3) The slider 20 for holding the sandwiched body is urged by the coil spring SP, and the sandwiched body moves up and down simply by operating the restraint lever 60 to disengage the slider 20 and the restraint lever 60. It can be in a sandwiched state in which the cord CD is sandwiched.
(4) Since the restraint lever 60 is exposed from the front surface 101f of the head box 101 to the indoor side, the user can easily switch between the braking state and the non-braking state of the braking device 1000.

2. Second Embodiment Next, the shielding device 100 according to the second embodiment of the present invention will be described with reference to FIGS. 14 and 15. The cloaking device 100 according to the second embodiment is similar to the cloaking device 100 of the first embodiment, and differs only in the configuration of the restraining means for restraining the movement of the slider 20 of the braking device 1000. This difference will be described below.

In the first embodiment described above, the restraint lever 60 inserted in front of the slider 20 is used as the restraint means, but in the present embodiment, the restraint cord 65 for pulling the slider 20 rearward is used as the restraint means. One end of the restraint cord 65 is attached to the rear side wall portion 22 (see FIG. 6) of the slider 20 and passes through the through hole 12i (see FIG. 14) formed in the rear side wall portion 12b of the case 10A to the outside of the case 10A. Pulled out. Then, as shown in FIG. 15, the other end side of the restraint cord 65 is pulled out from the restraint cord outlet 101b formed on the front surface 101f of the headbox 101 in the vicinity of the cord outlet 101a of the headbox 101. The other end of the restraint cord 65 is an annular engaging portion 65a, which can engage with the engaging projections 106p and 106q formed at two upper and lower positions of the operating rod 106.

With the above configuration, as in the first embodiment, the sandwiching body (tension transmission roller 30, idle roller 40) sandwiches the elevating cord CD at the sandwiching position (FIG. 14A). The position of the slider 20 can be switched between the (see) and the non-pinching position (see FIG. 14B) in which the sandwiching body does not pinch the elevating cord CD. That is, as shown in FIG. 15A, when the engaging portion 65a at the end of the restraint cord 65 is engaged with the upper engaging projection 106p, the slider 20 is not pulled backward, so that the lifting cord CD It is in a braking state where braking force is applied. On the other hand, as shown in FIG. 15B, when the engaging portion 65a is engaged with the lower engaging projection 106q, the slider 20 is pulled backward and the sandwiching body does not sandwich the elevating cord CD. Since it is restrained at the pinching position, it is in a non-braking state in which no braking force is applied to the elevating cord CD, and the shielding member 103 can be opened and closed quickly.

3. 3. Third Embodiment Next, the shielding device 100 according to the third embodiment of the present invention will be described with reference to FIG. The shielding device 100 according to the third embodiment is similar to the shielding device 100 of the first embodiment, but unlike the first embodiment, the braking device 1000 is not configured to restrain the movement of the slider 20. .. In the present embodiment, the rotational resistance to the weight holder 320 with the sun gear is reduced by disengaging the convex portion 321 of the weight 340 as the rotation resistor and the weight holder 320 with the sun gear as the rotation transmission member. As a result, the braking force applied to the elevating cord CD by the resistance applying portion RA is weakened. Hereinafter, the braking device 1000 of the shielding device 100 of the present embodiment will be specifically described.

The braking device 1000 of the present embodiment has a configuration in which the case 10A includes a supported portion 18 projecting radially outward from the cylindrical portion 13C and is supported by a supporting portion 101s formed in the head box 101. Further, in the present embodiment, the base 70 is divided into a base portion 71 mounted on the head box 101 and a movable portion 72 that can move up and down with respect to the base portion 71. The base portion 71 is connected to a plate-shaped base portion 71a, a shaft portion 71b extending upward from the base portion, and an upper end portion of the shaft portion 71b, and supports each component except the weight 340 of the braking device 1000. And. On the other hand, the movable portion 72 is a substantially disk-shaped member having a through hole 72a penetrating the shaft portion 71b in the central portion, and a mounting portion 72b on which the weight 340 is mounted extends in the circumferential direction on the outer side in the radial direction. Is formed. Further, on the front surface 101f side (right side of FIG. 16) of the head box 101 of the movable portion 72, an operation portion 72c exposed from the front surface 101f of the head box 101 is provided, and the movable portion 72 can be moved up and down. It has become.

With the above configuration, the braking device 1000 of the present embodiment has a weight 340 and a weight holder with a sun gear by moving the operation unit 72c upward as shown in FIG. 16A. By engaging the convex portion 321 of the 320, the weight 340 transmits the frictional force between the weight 340 and the inner peripheral wall of the case 10A to the elevating cord CD, so that the elevating cord CD is in a braking state in which the braking force is applied. Further, by moving the operation unit 72c downward, the weight 340 is moved downward to disengage the weight 340 from the convex portion 321 of the weight holder 320 with the sun gear, and no braking force is applied to the elevating cord CD. It can be in a non-braking state.

In this embodiment, it is preferable that the number of weights 340 is one. As a result, when the mounting portion 72b is moved up and down, it is possible to prevent the weight 340 from interfering with the convex portion 321 of the weight holder 320 with the sun gear and other weights 340. Further, in the present embodiment, the movable portion 72 may be held upward with respect to the base portion 71a of the base portion 71 by a leaf spring or the like, or may be held by an arbitrary snap-fit mechanism.

4. Fourth Embodiment Next, the shielding device 100 according to the fourth embodiment of the present invention will be described with reference to FIGS. 17 and 18. The braking device 1000 of the shielding device 100 of the present embodiment sandwiches the elevating cord CD between the tension transmission roller 30 whose shaft 31 is pivotally supported by the case 10A and the idle roller 40 supported by the pair of support plates 80. A sandwich is formed. Also in this embodiment, the rotation of the tension transmission roller 30 is transmitted to the resistance applying portion RA, and the resistance force of the resistance applying portion RA applies a braking force to the elevating cord CD. However, in FIGS. 17 and 18, the description of the resistance imparting portion RA is omitted.

The support plate 80 of the present embodiment has a thin plate-like oval shape, is supported by the rotating shaft 81 on one end side, and supports the shaft 41 of the idle roller 40 on the other end side. The shaft 41 of the idle roller 40 is held inside the arc-shaped guide groove 19 centered on the rotating shaft 81 formed in the case 10A. Further, projecting portions 41a projecting outward in the radial direction of the arc formed by the guide groove 19 are formed in a portion of the shaft 41 in contact with the guide groove 19, and the projecting portions 41a are formed at both ends of the guide groove 19. Engagement grooves 19a and 19b that engage with are formed. Here, the engaging groove 19a is formed at a position close to the tension transmission roller 30 with respect to the engaging groove 19b. In addition, the shaft 41 protrudes beyond the guide groove 19 to the outside of the case 10A (the front side of the paper surface of FIGS. 17 and 18), and this portion is formed on the front surface 101f of the head box 101 shown in FIG. It is also exposed from the through hole 101h and serves as an operation unit 41b for moving the shaft 41 along the guide groove 19.

When the protruding portion 41a of the shaft 41 and the engaging groove 19a of the guide groove 19 are engaged, the sandwiching body (tension transmission roller 30 and idle roller 40) moves up and down as shown in FIG. 18A. When the cord CD is sandwiched and the protruding portion 41a and the engaging groove 19b of the guide groove 19 are engaged, as shown in FIG. 18B, the sandwiching body (tension transmission roller 30 and idle roller 40) Is designed not to pinch the lifting cord CD.

With the above configuration, the braking device 1000 of the present embodiment operates the operation unit 41b to move the sandwiched body into the co-attached position shown in FIG. 18 (a) and FIG. 18 (b). It is possible to switch between the non-pinching position shown in). Therefore, the braking device 1000 of the present embodiment also has a braking state in which the resistance force of the resistance applying unit RA (not shown) is transmitted to the elevating cord CD to apply the braking force to the elevating cord CD by operating the operation unit 41b, and the resistance applying unit. It is possible to switch between a non-braking state in which the resistance force of RA is not transmitted to the elevating cord CD and no braking force is applied to the elevating cord CD.

The present embodiment can also be implemented in the following aspects.

In the above embodiment, the rotation of the tension transmission roller 30 is transmitted to the resistance applying portion RA, and the rotation resistance is imparted from the resistance applying portion RA. However, as in the configuration disclosed in Patent Document 1, the elevating and lowering is performed. The elevating cord CD may be bent by the roller moving with the movement of the cord CD, and a braking force may be applied to the elevating cord CD by the bending resistance. Also in this case, the braking device can be switched between the braking state and the non-braking state by providing a configuration in which the sandwiched body composed of the pair of rollers is fixed in a state of being separated from each other.

In the above embodiment, the horizontal blind has been described as an example of the shielding device 100, but the shielding device of the present invention may have a configuration different from that of the above embodiment. For example, the shielding device of the present invention may be a pleated curtain or a roll curtain on which the curtain cloth is wound.

The present invention is not limited to the above embodiment, and various modifications and changes can be made within the scope of the gist of the invention.

10A Case 11 Top wall portion 12 Side wall portion 12h Through hole 16 First top wall groove 17 Second top wall groove 20 Slider (holding member)
21 Top wall part 22 Rear side wall part 23 Bottom wall part 24 Front side wall part 25 Through hole 26 First top wall groove 27 Second top wall groove 28 First bottom wall groove 29 Second bottom wall groove 30 Tension transmission roller (rotating member) , Sandwiched body)
31 Shaft 32 Roller part 40 Idle roller (opposing member, sandwiching body)
41 Shaft 42 Roller 50 Pinion gear 60 Restraint lever (restraint means)
61 Tip 61a Inclined surface 62 Operation unit 63 Locking unit 64 Snap fit mechanism 70 Base 100 Shielding device 101 Head box 101a Cord outlet 101f Front surface 101h Through hole 102 Ladder code 103 Shielding member 104 Tilt drum 105 Shaft 106 Operation rod 106a Operation unit 107 Lock part 108 Code equalizer 109 Guide pulley 110 Support member 112 Cover part 113 Guide groove 114 Support groove 115 Inner peripheral gear 118 Groove 200 Alignment member 201 Insertion part 210 Through hole 230 Protrusion 231 Recession 260 Internal toothed carrier 280 Planetary gear 300 Plate 320 Weight holder with sun gear 340 Weight 341 Protrusion 702 Mounting cylinder 706 1st base groove 707 2nd base groove 1000 Braking device CD Lifting cord D1 Arrow DT Motion conversion part RA Resistance applying part SP Coil spring (biasing means)
X arrow

Claims (12)

A braking device that brakes the movement of the cord in the longitudinal direction, and is a braking state that brakes the movement of the cord while allowing the movement of the cord with respect to the movement of the cord in the same direction, and a non-braking state that does not brake the cord. A braking device that can be switched between braking states. A rotating member that can rotate by moving the cord in the longitudinal direction and a resistance imparting portion that imparts rotational resistance to the rotating member are further provided.
The braking device according to claim 1, wherein in the braking state, the movement of the cord in the longitudinal direction is braked by the resistance applying portion. A sandwiching body for sandwiching the cord is formed by the rotating member and an opposing member facing the rotating member.
The braking device according to claim 2, wherein when the sandwiching body sandwiches the cord, the braking state is set, and when the sandwiching body does not sandwich the cord, the non-braking state is set. A holding member for holding at least one of the rotating member and the facing member is provided, and at least one of the holding members is configured to move with the movement of the holding member.
The holding member is configured to move between a pinching position where the rotating member and the opposing member sandwich the cord and a non-pinching position where the rotating member and the opposing member do not sandwich the cord. The braking device according to claim 3. The braking device according to claim 4, further comprising an urging means for urging the holding member, and the holding member is moved to the pinching position by being urged by the urging means. With the movement in one direction along the longitudinal direction of the cord, the holding member moves in the urging direction of the urging means, and the rotation of at least one of the rotating member and the opposing member is transmitted to the resistance applying portion. Being done
The holding member moves against the urging of the urging means as the cord moves in the other direction along the longitudinal direction, thereby imparting the resistance to the rotation of at least one of the rotating member and the opposing member. The braking device according to claim 5, wherein the transmission to the unit is released. The braking device according to any one of claims 4 to 6, further comprising a restraining means for restraining the holding member at the non-pinching position. The braking device according to claim 7, wherein the restraining means is a restraining lever that engages with the holding member and regulates the movement of the holding member to the sandwiching position. The braking device according to claim 7, wherein the restraining means is a restraining cord for restricting movement to the pinching position by pulling the holding member in a direction of moving the holding member from the pinching position to the non-pinching position. .. The resistance applying portion includes a rotation transmission member that rotates with the rotation of the rotation member and a rotation resistor that can rotate by engaging with the rotation transmission member, and the rotation resistor is generated with the rotation. It is configured to be movable outward in the radial direction by the centrifugal force and to generate rotational resistance due to friction with the wall surface formed on the outer side in the radial direction.
By disengaging the rotation transmission member and the rotation resistor body, the rotation resistance to the rotation member is reduced, and the movement of the cord in the longitudinal direction is not braked by the resistance applying portion, resulting in a non-braking state. The braking device according to any one of claims 2 to 6. Includes the case covering at least a portion of the holding member, the said case has a engaged portion and the engagement match that engaging portion of the holding member,
The braking device according to any one of claims 4 to 6, wherein the holding member is fixed to the non-pinching position by engaging the engaged portion with the engaging portion. The shielding device according to any one of claims 1 to 11, further comprising the braking device and a shielding member that opens and closes with the movement of the cord.

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