JP6727694B2 - Shielding device - Google Patents

Description

The present invention relates to a shielding device such as a horizontal blind, a pleated curtain, a tuck-up curtain, and a roller blind.

In the horizontal blind, the end of the tension cord on the support side is attached to the bottom rail, and the operation of the tension cord on the operating side changes the length of pulling out the tension cord from the head box to raise and lower the bottom rail. There is one.

In such a horizontal blind, the head box is usually provided with a stopper portion that holds the tension cord so that the bottom rail does not descend by its own weight, and the stopper cord is locked by the operation of the operation side of the tension cord. Release the state and lower the bottom rail by its own weight.

In such a horizontal blind, when the hand is released from the tension cord in the state where the stopper portion is unlocked, the bottom rail may drop vigorously to the lower limit position to generate noise.

In order to solve such a problem, in Patent Document 1, three lifting cords are respectively wound around a drum arranged in a head box, and the drum is rotated as the bottom rail is lowered to generate rotation resistance. By doing so, the lowering speed of the bottom rail is reduced.

Japanese Utility Model Publication No. 56-70094

However, the configuration of Patent Document 1 has a problem that the head box becomes large in size because the number of parts to be arranged in the head box increases.

The present invention has been made in view of such circumstances, and provides a shielding device capable of reducing the automatic moving speed of the shielding material while preventing the hollow support from increasing in size.

According to the present invention, a rotation resistance body is provided outside a hollow support body that suspends and supports a shielding material and has a space inside, and by a rotation resistance generated by the rotation resistance body with automatic movement of the shielding material. A shielding device is provided that is configured to add resistance to the automatic movement of the shielding material.

In the shielding device of the present invention, the automatic movement speed of the shielding material is suppressed by utilizing the rotation resistance generated by the rotation resistor arranged outside the hollow support. With this configuration, the hollow support does not become large.

In the present invention, examples of the "hollow support" include the following.
-In horizontal blinds, pleated screens, tuck-up curtains, and other shielding devices that raise and lower the shielding material using a lifting cord, a hollow material that supports the shielding material (slats, screens, curtain fabrics) directly or through the cord. Head box. In the horizontal blind, the slats are suspended and supported by the head box via the slats supporting cords. In pleated screens or comb curtains, the screen or curtain is suspended from and supported by the headbox.
-In a roller blind, a hollow take-up pipe that suspends and supports the screen and winds and unwinds the screen. The side bracket that rotatably supports the take-up pipe is not included in the hollow support body.
・In a shielding device such as a curtain rail, vertical blind, panel screen, etc. that opens and closes the shielding material by moving the shielding material along the rail, the shielding material (curtains, slats, panels) is hung and supported via a runner. Hollow hanger rails.

In the present invention, the following are examples of "automatic movement".
・Self-weight lowering in self-weight lowering type shielding device (bottom rail and shield fall naturally due to gravity)
・Automatic lift in the spring-assist type shielding device (automatic lift in the ascending direction due to the biasing force accumulated by the downward movement)
.Automatic opening/closing of moving the shielding material along the hanger rail by an urging means such as a spring or a weight (automatic movement in the other direction by urging force accumulated by moving in one direction)
-Automatic opening and closing by moving the shielding material along the hanger rail by inclining the hanger rail

The shielding device to which the present invention is applied is usually provided with a stopper that blocks the automatic movement of the shielding material. When the shielding material is not automatically moved, the stopper is activated and the stopper is released from the operation. The shielding material can be automatically moved.

Hereinafter, various embodiments of the present invention will be exemplified. The embodiments described below can be combined with each other.
Preferably, the hollow support is a head box, the shielding device, the support side and the operating side of the tension cord is led out from the head box, and the support of the tension cord by the operation of the operation side of the tension cord. It is a shielding device which raises and lowers the shielding material by changing the side lead-out length, and the rotation resistor is configured to rotate with the movement of the tension cord.
Preferably, the rotation resistor is provided at a tip end portion of a support rod suspended and supported from the head box.
Preferably, the rotation resistor is supported by a support rod suspended from the head box, the support rod is a tubular body having an insertion hole, and the tension cord is inserted into the insertion hole. ..
Preferably, the case of the rotation resistor is rotatable with the support rod.
Preferably, the rotation resistor is supported by a support rod suspended from the head box, the tension cord is not inserted through the support rod, and the case of the rotation resistor rotates relative to the support rod. It is possible.
Preferably, the hollow support is a head box or a take-up pipe, and the shielding device is a shielding device that moves up and down the shielding material by operating a loop-shaped operation cord that is hooked on an operation pulley. The operation pulley is supported so as to be relatively rotatable with respect to the head box, or is supported so as to be relatively rotatable with respect to a side bracket that supports the winding pipe so as to be relatively rotatable, and the rotation resistor is It is configured to rotate with the movement of the operation code.
Preferably, the rotation resistor is supported by a support rod suspended from the head box or the side bracket.
Preferably, the support bar is rotatably supported at least in the front-rear direction or the left-right direction with respect to the head box or the side bracket.
Preferably, the support rod is rotatably supported with respect to the head box about an axis of the support rod, and the rotation of the support rod is transmitted to an angle adjusting shaft provided in the head box. To be configured.
Preferably, the hollow support is a winding pipe, and the shielding device is a shielding device that moves the shielding material up and down by winding and rewinding the shielding material with respect to the winding pipe. The rotation resistor is configured to generate rotation resistance by input rotation having a rotation axis different from that of rotation of the winding pipe.
Preferably, the hollow support is a winding pipe, and the shielding device is a shielding device that moves the shielding material up and down by winding and rewinding the shielding material with respect to the winding pipe. Thus, the rotation resistor is configured to generate rotation resistance with respect to any of the rotation transmission wheel trains arranged outside the cap of the winding pipe.
Preferably, the rotation resistor is supported by a body adjacent to the shielding device or an object fixedly set on the body.
Preferably, the hollow support is a head box or a take-up pipe, and the rotation resistor and a member supporting the same are independent of the head box or the take-up pipe or an object fixed thereto. The cage can be retrofitted or removable.
Preferably, the rotation resistor is provided in a grip, and the grip can be retrofitted to a cylindrical body that is suspended from the head box and has an insertion hole.
Preferably, the rotation resistor is provided in a grip, the grip is attached to a cylinder body that is suspended from the head box and has an insertion hole, and the cylinder body is attached to and detached from the head box. It is possible.
Preferably, a cord that is driven by the automatic movement of the shielding member and a pulley that is housed in a case and is capable of inserting and removing the cord are provided, and the pulley is rotated by being driven by the cord. Configured to apply input rotation to the resistor, the pulley and the rotating resistor are assemblies.
Preferably, the assembly is configured to be rotatably attachable to a support rod suspended from the head box.
Preferably, the rotary resistor is a rotary oil damper or a centrifugal governor.

It is a front view which shows the horizontal blind of 1st Embodiment of this invention. It is an enlarged view of the upper right part of the horizontal blind of FIG. It is the schematic diagram which extracted and pulled out the tension cord 19 and its related member from FIG. 1, (a) shows the state in which the bottom rail 4 is in a lower limit position, (b) pulls down the operation side 19o of the tension cord 19. The bottom rail 4 is in a raised position. 1A shows the operation rod 8, the support case 11, and the cord equalizer 10 in FIG. 1, and the operation rod 8 and the support case 11 show a cross section passing through the contact surfaces of the support base 11a and the cover 11b. .. (B) shows a state in which the code equalizer 10 is pulled down from the state of (a). 4A is a cross-sectional view of a portion of the support case 11 in FIG. 4A, which passes through the center of the base cord 12a. (B)-(c) is an AA sectional view in (a), (b) shows the state in which the base cord 12a is arrange|positioned in the cord insertion groove 14b, (c) is a raising/lowering cord. 9 shows the state of being arranged in the cord insertion groove 14b. (A) is a perspective view showing a support base 11a and components inside thereof, and (b) is an exploded perspective view of (a). It is an exploded perspective view which looked at the state of Drawing 6 (b) from another angle. FIG. 10 is a perspective view showing a modified example 1 of the first embodiment of the present invention, and showing a configuration in which the rotation resistor 15 is supported by the window frame 25 fixedly installed on the wall surface adjacent to the horizontal blind 30. FIG. 10 is a perspective view showing a modified example 2 of the first embodiment of the present invention, showing a configuration in which a support case (damper/pulley assembly) 11 is rotatably supported by the operation rod 8. FIG. 10 is an enlarged view of the vicinity of the support case 11 and the operation rod 8 of FIG. 9, (a) is a front view showing a state where the support case 11 and the operation rod 8 are separated, and (b) is a support case 11 It is a front view which shows the state in which the operating rod 8 is connected. (A) shows the support case 11, the rotation transmission pulley 14, and the knob 27. Regarding the support case 11, a cross section passing through the contact surfaces of the support base 11a and the cover 11b is shown. 10B is a sectional view taken along line AA of FIG. FIG. 10C is a sectional view taken along line BB in FIG. 11D is a cross-sectional view taken along line CC of FIG. 11A. (A)-(b) is drawing corresponding to Drawing 4 (a) in the state where bottom rail 4 was descended to near the lower limit position in the horizontal blind of a 2nd embodiment of the present invention. (A) and (b) respectively show the state before the region R in which the ball is not arranged passes through the rotation transmission pulley 14 and the state after the region R passes through it. (A)-(b) respond|corresponds to FIG.12(a)-(b), (a) shows the state which the bottom rail 4 dropped to the lower limit vicinity, (b) shows (a). The state in which the bottom rail 4 descends from the state of (1) by a distance corresponding to the region R and reaches the lower limit is shown. It is a figure corresponding to Drawing 4 (a) in the state where bottom rail 4 was lowered to near the lower limit position in a horizontal blind of a 3rd embodiment of the present invention. FIG. 4A is a drawing corresponding to FIG. 4A in a state in which the bottom rail 4 is lowered to near the lower limit position in the horizontal blind according to the fourth embodiment of the present invention. (B) is a perspective view showing the rotation transmission pulley 14 in (a). Note that, in (a), the rotation transmission pulley 14 is illustrated in a simplified manner. The tucking-up curtain which is the winding type shielding apparatus of 5th Embodiment of this invention is shown, (a) is a perspective view, (b) is the support case 11 (damper pulley assembly) in (a). FIG. 3 is a cross-sectional view showing the internal configuration of 16A is a cross-sectional view of the vicinity of the operating device 38 of FIG. 16 (a front view of the support rod 60), and FIG. 16B is a cross-sectional view of the vicinity of the support rod 60. FIG. 17 is a perspective view of the vicinity of the operating device 38 in FIG. 16. FIG. 18 is a development view of the outer peripheral surface of the drum 48 in FIG. 17 in the circumferential direction. It is a perspective view which shows the roll blind which is the winding type shielding apparatus of 6th Embodiment of this invention. It is a right view of FIG. It is sectional drawing of the vicinity of the side bracket 73a of FIG. It is a perspective view near the side bracket 73a of FIG. It is a perspective view which shows the roll blind which is a pulling down type shield device of 7th Embodiment of this invention. The self-weight lowering type roller blind which is a shielding apparatus of 8th Embodiment of this invention is shown, (a) is a front view, (b) is a right view. The spring assist type roller blind which is the shielding apparatus of 9th Embodiment of this invention is shown, (a) is a front view, (b) is a right view. (A) is a perspective view of the rotating resistor 15 which consists of a centrifugal governor used in a 10th embodiment of the present invention. (B) is sectional drawing of (a). (C)-(d) is an AA sectional view in (b). (C) shows a state in which the central shaft 15b is stopped, and (d) shows a state in which the central shaft is rotating. 27A shows a state in which the central shaft 15b of the rotation resistor 15 in FIG. 27 is engaged with the rotation transmission pulley 14, and FIG. 27B shows the rotation transmission pulley 14 and the rotation resistor 15 in the support base of the support case 11. 11a shows a state of being attached to 11a.

Embodiments of the present invention will be described below with reference to the drawings. The various features shown in the embodiments described below can be combined with each other. Further, the invention is independently established for each characteristic item.

(First embodiment)
A first embodiment of the present invention will be described below with reference to the drawings. The horizontal blinds shown in FIGS. 1 to 7 have a plurality of slats 3 suspended from a hollow head box 1 via a plurality of ladder cords 2, and a bottom rail 4 is suspended at the lower end of the ladder cord 2. Lower supported. The ladder cord 2 is a form of "slat support cord". The “slat support cord” is not limited in its structure as long as it can support and rotate the slat 3, and, for example, includes two warp threads separated from each other, and one warp thread is attached to one edge of the slat. It may be attached so that the other warp thread is attached to the other edge of the slat.

A plurality of 5 are arranged in the head box 1, and a tilt drum 6 is rotatably supported by a supporting member 5 thereof. The upper end of the ladder cord 2 is attached to the tilt drum 6, and the angle adjusting shaft 7 is fitted and inserted in all the tilt drums 6 at the center of the tilt drum 6. Therefore, when the angle adjusting shaft 7 is rotated, all the tilt drums 6 are rotated, and one of the warp threads of the ladder cord 2 is pulled up in accordance with the rotation of the tilt drums 6, so that each slat 3 and the bottom rail are 4 is adjusted in phase with the same phase.

An operation rod 8 made of a cylinder is suspended and supported at one end of the head box 1, and a support case 11 is provided at the lower end of the operation rod 8. When the support case 11 is gripped and the operating rod 8 is rotated, the angle adjusting shaft 7 is rotated via the gear mechanism arranged in the head box 1. In other words, the operating rod 8 is rotatably supported with respect to the head box 1 about the axis of the operating rod 8, and the rotation of the operating rod 8 is transmitted to the angle adjusting shaft 7. Therefore, the angle of each slat 3 can be adjusted by rotating the operating rod 8. The support case 11 functions as a case for supporting a rotation resistor 15 which will be described later, and also as a grip for facilitating the rotational operation of the operating rod 8.

A plurality of (three in the present embodiment) lifting cords 9l, 9c, 9r (only referred to as "lifting cord 9" if no distinction is required) are hung from the head box 1, and the lifting cords are respectively hung. One end of 9 is attached to the bottom rail 4. A deflection pulley 21 is pivotally supported on each support member 5 at an axial center 23 in the front-rear direction, and an elevating cord 9 introduced into the head box 1 can be guided in the left-right direction of the head box. Further, each support member 5 has a space through which another lifting cord can pass in the left-right direction. Therefore, as shown in FIG. 2, the other end of the lifting cord 9r at the right end is turned and guided by the support member 5, and the lifting cords on the non-operating side (in FIG. 2, the lifting cords 9l and 9c at the left end and the center) are supported by the supporting members 5. The head box 1 is guided in the direction of the operation rod 8 via the member 5. Then, it is inserted into the cylindrical operation rod 8 via the stopper portion 16 provided in the head box 1. As shown in FIG. 4( a ), the other end of the lifting cord 9 is connected to one end of the ball chain 12 at the connecting portion 13, and the other end of the ball chain 12 passes through the passage 11 d in the support case 11. Attached to the code equalizer 10. The method of connecting the lifting cord 9 and the ball chain 12 is not particularly limited, and the lifting cord 9 and the base cord 12a may be connected, or the lifting cord 9 and the ball 12b may be connected. Examples of the method for connecting the lifting cord 9 and the ball chain 12 include welding, bonding, sewing, caulking, knotting, and engagement between a knot ball and a hole. The ball chain 12 is configured by arranging a large number of balls 12b along the base cord 12a at substantially equal intervals. In the present embodiment, as shown in FIG. 3, the cord to which the lifting cord 9 and the ball chain 12 are connected is the tension cord 19, and the side that is pulled out from the head box 1 and attached to the bottom rail 4 is the tension cord. The support side 19s of 19 and the side of the cord 19 which is led out from the head box 1 and attached to the cord equalizer 10 is the operating side 19o of the tension cord 19. As shown in FIG. 3, the support side 19s and the operating side 19o are led out from different positions of the head box 1. In this example, the operating side 19o is led out from a position different from the lead-out position of the lifting cord 9, but the operating side 19o may be led out from the same position as the leading position of any one of the lifting cords 9. As the bottom rail 4 rises, the lead-out length of the support side 19s of the tension cord 19 becomes shorter and the lead-out length of the tension cord 19 at the operating side 19o becomes longer. The support side 19s and the operating side 19o of the tension cord 19 are functional concepts that change depending on the height position of the bottom rail 4, and which range of the tension cord 19 is the supporting side 19s and which range is the operating side 19o. The same part of the pulling cord, which cannot be drawn, can be the supporting side 19s and the operating side 19o.

Here, the configurations of the support case 11 and members inside thereof will be described in detail with reference to FIGS. 4 to 7.
The support case 11 includes a support base 11a and a cover 11b (shown in FIG. 1) fixed to the support base 11a. The cylindrical portion 14f of the rotation transmission pulley 14 is inserted into the pulley bearing portion 11e of the support base 11a so that the rotation transmission pulley 14 is rotatably supported by the support base 11a. A central shaft 15b having a non-circular cross-section of the rotation resistor 15 is fitted into the fitting hole 14e of the rotation transmission pulley 14 so that the central shaft 15b rotates integrally with the rotation transmission pulley 14. The case 15a of the rotation resistor 15 is housed in the housing portion 14d of the rotation transmission pulley 14.

The rotation transmission pulley 14 is provided with a plurality of (six in the present embodiment) engagement protrusions 14a that radially protrude from the annular main body portion 14g, and are arranged at equal intervals in the circumferential direction. The inner surface of the recess 14c between the fitting protrusions 14a is shaped so that the ball 12b is engaged. The main body portion 14g and the engaging protrusion 14a are arranged in the pulley accommodating portion 11g of the support base 11a. In this state, when the ball chain 12 moves so as to pass through the passage 11d, the ball 12b is engaged with the recess 14c and the rotation transmission pulley 14 rotates. Further, the side wall 11a1 of the support case 11 prevents the balls 12a from escaping in the radial direction. Further, each engaging protrusion 14a is provided with a cord insertion groove 14b through which the elevating cord 9 and the base cord 12a of the ball chain 12 can be inserted. As shown in FIG. 5B, the width W of the cord insertion groove 14b is larger than the diameter of the base cord 12a, and there is a gap between the side wall 11a1 of the support case 11 and the rotation transmission pulley 14 as well. The base cord 12a is designed not to be engaged with the cord insertion groove 14b. When the lifting cord 9 is not engaged with the cord insertion groove 14b, the width W of the cord insertion groove 14b is preferably larger than the sum of the diameters of the plurality of lifting cords 9. However, as shown in FIG. 5C, even when the width W of the cord insertion groove 14b is smaller than the sum of the diameters of the plurality of lifting cords 9 (three in the present embodiment), the inner surface of the cord insertion groove 14b. By making the torque generated by the friction between the lifting cord 9 and the lifting cord 9 smaller than the minimum torque required to rotate the rotation transmission pulley 14, the lifting cord 9 can be slid with respect to the cord insertion groove 14b. ..

The rotation resistor 15 includes a case 15a, a central shaft 15b that axially projects from the case 15a, and a rotation restriction protrusion 15c that radially projects from the case 15a. The rotation resistor 15 is non-rotatably fixed to the cover 11b by the rotation restriction protrusion 15c engaging with the cover 11b. The case 15a and the cover 11b may be integrated instead of being separate bodies. Further, the fitting concave portion between the rotation restricting protrusion 15c and the cover 11b may be omitted. The rotation resistor 15 is configured to generate rotation resistance by the relative rotation of the central shaft 15b with respect to the case 15a. Therefore, when the central shaft 15b rotates as the rotation transmission pulley 14 rotates, the rotation resistance 15 rotates. Occurs.

The rotation resistor 15 is not particularly limited in its configuration as long as the rotation resistance is generated by the relative rotation of the central shaft 15b with respect to the case 15a, and a viscous fluid (eg, oil) is contained in the case 15a. Is accommodated and the moving member (eg piston, wing, screw) moves in the viscous fluid with the rotation of the central shaft 15b (eg: rotational movement, linear movement; By means of a mechanism for converting to linear movement inside the case), or those configured to rotate together with the central shaft 15b as the central shaft 15b rotates. A friction member (eg, rubber/governor metal) is configured to generate rotational resistance by being pressed against the inner surface of the case 15a or a surface fixed in the case by centrifugal force to generate rotational resistance, Examples include magnetic materials and metals that move or rotate, and air resistance dampers that use rotary wings. When the rotation input to the central axis is in the rising direction of the blind, it is preferable to provide a one-way function that reduces or does not cause rotation resistance. The one-way function may be configured by providing a one-way clutch outside the rotation resistor 15, for example, between the central shaft 15b and the pulley, and the rotation restricting protrusion 15c and the cover 11b are not fitted to each other during upward rotation. It may be (co-rotation). Further, the rotary resistor 15 is of a type in which the resistance value changes depending on the rotational position of the rotary input with respect to the central axis (or the number of rotations from a predetermined state) (for example, inside the rotary resistor 15). If the resistance value changes as the resistor moves along with the rotation input), the resistance value will change as the number of rotations increases when the shield rotates in the descending direction. It is preferable to set.

A structure (eg, a rotary oil damper) that utilizes a resistance force generated when the moving member moves in the viscous fluid has a simple structure, and thus has an advantage of being easily miniaturized. On the other hand, in the structure using centrifugal force (eg, centrifugal governor), the rotation resistance is very small when the rotation speed of the central shaft 15b is small, so the bottom rail 4 approaches the lower limit position and the descending speed decreases. When the braking force is very small. Therefore, it is possible to prevent the problem that the bottom rail 4 is not lowered to the lower limit position.

Here, the operation of the horizontal blind of this embodiment will be described.
As shown in FIG. 1, when the bottom rail 4 is in the lower limit position, the cord equalizer 10 is in contact with the lower surface of the support case 11 as shown in FIGS. 1 to 3A and 4A. The balls 12b of the ball chain 12 are engaged with the recesses 14c of the rotation transmission pulley 14. In this state, when the operating side 19o of the tension cord 19 is pulled down, the rotation transmission pulley 14 rotates counterclockwise in FIG. 4(a), and at the same time the length of the lifting cord 9 derived from the head box 1 (that is, the tension cord 19). (The derived length of the support side 19s) becomes shorter, and the bottom rail 4 rises as shown in FIG. 3(b). Since the central shaft 15b of the rotation resistor 15 rotates as the rotation transmission pulley 14 rotates, a rotation resistance is generated. At this time, if the above-mentioned one-way function is provided, the rotational resistance at the time of ascent is reduced or not acted, so that the raising operation force can be reduced as compared with the case where the one-way function is not provided.

After the operation side 19o of the tension cord 19 is continuously pulled down and the connecting portion 13 passes through the rotation transmission pulley 14, the lifting cord 9 passes through the cord insertion groove 14b of the rotation transmission pulley 14. In the present embodiment, since the lifting cord 9 is not engaged with the cord insertion groove 14b, the rotation transmission pulley 14 is not rotated as the lifting cord 9 moves.

The state after the operation side 19o of the tension cord 19 is pulled down and the bottom rail 4 reaches near the upper limit position is shown in FIGS. 3(b) and 4(b). When the hand is released from the pull cord 19 in this state, the stopper portion 16 operates and the stopper portion 16 holds the elevating cord 9 so that the bottom rail 4 does not descend by its own weight.

In this state, if the operating side 19o of the tension cord 19 is pulled down a little, the lock state of the lifting cord 9 at the stopper 16 is released, and the bottom rail 4 descends by its own weight.

The ball chain 12 moves toward the head box 1 as the weight of the bottom rail 4 descends, and when the ball chain 12 reaches the rotation transmission pulley 14, the rotation transmission pulley 14 starts to rotate. Then, when the central shaft 15b of the rotation resistor 15 rotates as the rotation transmission pulley 14 rotates, a rotation resistance is generated. Therefore, a braking force is applied to the movement of the ball chain 12, and the speed of the bottom rail 4 descending by its own weight is increased. Will be reduced. When the rotation speed-dependent rotation resistor is used, the dead weight of the shielding material (in this embodiment, the total weight of the bottom rail 4 and the weight of the slats 3 supported on the bottom rail 4) decreases. The rotation resistance decreases as the descending speed of the bottom rail 4 decreases, and the bottom rail 4 descends to the lower limit. In the case of using the rotation resistor depending on the rotation position, the position of the resistor inside the rotation resistor moves as the position of the bottom rail 4 decreases (the engagement position of the chain changes), and the central axis accordingly. The rotation resistance of the bottom rail 4 decreases and the bottom rail 4 descends to the lower limit.

By the way, when the stopper portion 16 is configured to pass the lifting cord 9 but not the ball chain 12, the ball chain 12 is pulled into the head box 1 as the bottom rail 4 descends, and the stopper portion 16 is pulled. When it reaches 16, the ball chain 12 interferes with the stopper portion 16 and the lowering of the bottom rail 4 is stopped. Therefore, in the present embodiment, the ball chain 12 is arranged so that the ball chain 12 does not reach the stopper portion 16 before the bottom rail 4 reaches the lower limit position, and preferably the ball chain 12 does not reach the head box 1. doing. Therefore, the region where the rotation resistor 15 can be rotated is the stopper portion 16 or the head box 1 after the first ball 12bs (shown in FIG. 4A) of the ball chain 12 reaches the rotation transmission pulley 14. It depends on the moving distance of the ball chain 12 until reaching. Then, in order to lengthen this moving distance, it suffices to dispose the rotation resistor 15 at a position as far as possible from the head box 1. Therefore, in the present embodiment, the rotation resistor 15 is the tip portion of the operation rod 8. It is provided on the support case 11 attached to the.

When the configuration of this embodiment is applied to an already installed horizontal blind, the operation rod, grip, and lifting cord of the horizontal blind are used as the operation rod 8, the support case 11, and the tension cord 19 of this embodiment. It suffices to replace it with (a cord in which the lifting cord 9 and the ball chain 12 are connected), and it is not necessary to dispose a new component in the head box 1. Since the support case (grip, damper/pulley assembly) 11 of the present embodiment is configured so that it can be retrofitted to the operation rod (cylindrical body) 8, it replaces the grip of the horizontal blind already installed. Is easy. Further, the operation rod (cylindrical body) 8 is configured to be attachable to and detachable from the head box 1. Therefore, it is easy to replace the already installed horizontal blind with the support rod. Therefore, the configuration of the present embodiment can be easily applied to the horizontal blind already installed. Moreover, since no new component is arranged in the head box 1, the head box 1 is not made large.

The present invention can also be implemented in the following modes.

(Modification 1)
In the first modification of the above-described embodiment, the rotating resistor may be supported by a body such as a wall surface adjacent to the shielding device or an object (a window frame or the like) fixedly installed on the body. Specifically, in the form shown in FIG. 8, one end of the two lifting cords 9l, 9r is attached to the bottom rail 4, and the other end passes through the inside of the head box 1 and is adjacent to the suspended position of the operation rod 8. It is led out from the cord outlet 26 provided at the position. A ball chain 12 is connected to the other ends of the lifting cords 9l and 9r, and a knob 27 is attached to the tip of the ball chain 12. The support base 11 a is fixed by screws 29 or the like to the window frame 25 in which the horizontal blind 30, which is a shielding device, is installed. A rotation transmission pulley 14 and a rotation resistor 15 are attached to the support base 11a to form a damper pulley assembly, and a cover is attached to the support base 11a. Even in such a configuration, by engaging the ball chain 12 with the rotation transmission pulley 14 as in the above-described embodiment, the rotation resistance is generated by applying input rotation to the rotation resistor 15 as the bottom rail 4 descends by its own weight. Can be made.

(Modification 2)
-The modification 2 of the said embodiment is demonstrated using FIGS. 9-11. The basic configuration of the modified example 2 is similar to the modified example 1 described above, and the main difference is that the support case 11 is supported by the operation rod 8 so as to be relatively rotatable, instead of being fixed to the window frame 25. Is. Since the operating rod 8 is a solid body, the lifting cord 9 is not inserted through the operating rod 8. As in the first embodiment, the rotation transmission pulley 14 and the rotation resistor 15 are housed in the support case 11, and the rotation transmission pulley 14 and the rotation resistor 15 are a damper/pulley assembly. The operation rod 8 has a regular hexagonal cross section. The operating rod 8 is inserted into a rotary joint 95 having an insertion hole 95e capable of engaging the operating rod 8 in a relatively non-rotatable manner. The rotary joint 95 is provided with a screw hole 95d. With the operating rod 8 inserted in the insertion hole 95e, the set screw 96 is screwed into the screw hole 95d so that the tip of the set screw 96 is attached to the operating rod 8. The rotary joint 95 can be fixed to the operating rod 8 by pressing. The rotary joint 95 includes a column portion 95a, an upper flange 95b provided on the upper portion of the column portion 95a, and a lower flange 95c provided on the lower portion of the column portion 95a. The screw hole 95d is provided in the column portion 95a, and the length of the set screw 96 is set so that the end portion of the set screw 96 does not protrude from the outer peripheral surface of the column portion 95a.

The support case 11 is provided with a pair of arms 11h, and a gap 11j is provided between the tip ends of the pair of arms 11h. The connection between the arm 11h and the rotary joint 95 is performed by pressing the rotary joint 95 against the arm 11h so that the columnar portion 95a is located in the gap 11j and widening the interval between the pair of arms 11h, and arranging the columnar portion 95a between the pair of arms 11h. Can be done by doing. The inner surface 11i of the arm 11h has an arc shape, and the support case 11 is supported so as to be rotatable relative to the rotary joint 95 by bearing the cylindrical portion 95a by the inner surface 11i. The arm 11h is arranged between the upper flange 95b and the lower flange 95c, and the vertical movement of the arm 11h is restricted by these flanges. Further, when a separating force is applied between the support case 11 and the rotary joint 95 in a direction perpendicular to the longitudinal direction of the operation rod 8, the gap between the pair of arms 11h is widened and the support case 11 is easily separated from the rotary joint 95. It As described above, the support case 11 (that is, the damper/pulley assembly) that holds the rotation transmission pulley 14 and the rotation resistor 15 is detachable from the operation rod 8.

A plurality of engaging grooves 14h extending over the entire circumference are provided on the outer peripheral surface of the rotation transmitting pulley 14, and one lifting cord 9 is engaged with each engaging groove 14h. Further, in order to increase the frictional force between the lifting cord 9 and the engaging groove 14h and suppress the sliding of the lifting cord 9, pressing rollers 97 and 98 are provided adjacent to the rotation transmission pulley 14, and the lifting cords 97 and 98 are provided. 9 is inserted between the rotation transmission pulley 14 and the pressing rollers 97, 98. When the lifting cord 9 moves in the longitudinal direction as the bottom rail 4 descends, the rotation transmission pulley 14 is rotated. Since the center shaft 15b (illustrated in FIG. 7) of the rotation resistor 15 is fitted in the fitting hole 14e provided in the rotation transmission pulley 14, the rotation resistor 15 is rotated by the rotation resistor 15 as the rotation transmission pulley 14 rotates. Input rotation is added.

(Other modifications)
The present invention is also applicable to a shielding device in which the shielding material is other than slats. In this case, the tilt drum, the shaft, and the tilt rotation transmission mechanism may be omitted. In this case, the operation rod (tilt operation in this embodiment) is not used, but the support rod is used.

In the above embodiment, the lifting cord and the chain are inserted into the operating rod, but they may not be inserted. For example, a non-cylindrical support member for supporting the rotation resistor from the head box may be suspended and supported, and the rotation resistor may be supported by this support member.
In the above embodiment, the rotation resistor 15 is provided on the support case 11 attached to the tip of the operation rod 8 (that is, the tip portion of the support rod), but the rotation resistor 15 is different from the support rod. You may provide in a position.
-The present invention can be applied to a shielding device (tuck-up curtain, roll-up blind, etc.) that does not have a bottom rail. This is because even in such a shielding device, the shielding material can be moved up and down by changing the lead-out length of the tension cord on the support side.
The rotation cord 9 may be engaged with the rotation transmission pulley 14 without rotating the ball chain 12 to rotate the rotation transmission pulley 14.
In the above-described embodiment, the case 15a of the rotation resistor 15 is fixed and the central shaft 15b is rotated, but it is configured to generate the rotational resistance by fixing the central shaft 15b and rotating the case 15a. May be. Further, in this case, instead of using the rotation transmitting pulley 14, the ball chain 12 may be engaged with the outer periphery of the case 15a to rotate the case 15a to generate the rotation resistance.
In the above-described embodiment, the rotation resistance is generated in the rotation resistor 15 only in the ball chain 12, but the rotation resistance is also generated in the portion of the elevating cord 9 that passes through the rotation resistor 15 to lower the bottom rail 4. Rotational resistance may be generated over the entire length of the range. For example, by narrowing the width of the cord insertion groove 14b or by forming the cord insertion groove 14b into a V shape, the elevating cord 9 engages with the cord insertion groove 14b and the rotation is transmitted as the elevating cord 9 moves. The pulley 14 can be configured to rotate.

(Second embodiment)
A second embodiment of the present invention will be described with reference to FIG. This embodiment is similar to the first embodiment, and the differences will be mainly described below.

FIG. 12 shows the positional relationship between the code equalizer 10 and the support case (damper/pulley/assembly) 11 when the bottom rail 4 is lowered to near the lower limit position. In this state, the code equalizer 10 is arranged near the lower surface 11f of the support case 11, but is not in contact with the lower surface 11f.

In the self-weight descending type shield device, normally, as the bottom rail 4 descends, the ratio of the load of the shield material supported by the ladder cord 2 and the head box 1 increases, and the load applied to the elevating cord 9 decreases. There is always a resistance of each part in the shielding device, and when lowering the bending state of the shielding material like a pleated screen or a honeycomb screen in the direction of extending it, there is also the resistance of the shielding material itself, so only overcome the total resistance. If the load does not act on the bottom rail 4, the bottom rail 4 may not be fully lowered to the lower limit position.

In order to prevent such a phenomenon from occurring, in the present embodiment, as shown in FIG. 12A, at the time when the lowermost ball 12be of the ball chain 12 passes through the rotation transmission pulley 14, FIG. ), the balls 12be are arranged so that the bottom rail 4 does not reach the lower limit position, and a region R where the balls are not arranged is provided between the balls 12be and the code equalizer 10. According to such a configuration, the descending speed of the bottom rail 4 is reduced to an appropriate speed while a large number of balls 12b of the ball chain 12 pass through the rotation transmission pulley 14 as in the first embodiment, and the balls 12be 12 passes through the rotation transmitting pulley 14 and, as shown in FIG. 12B, while the region R where no balls are arranged passes through the rotation transmitting pulley 14, the rotation transmitting pulley 14 does not rotate, so that rotation resistance is generated. Instead, as shown in FIG. 13B, the bottom rail 4 easily reaches the lower limit position.

(Third Embodiment)
A third embodiment of the present invention will be described with reference to FIG. This embodiment is similar to the second embodiment, and the differences will be mainly described below.

In the configuration of the second embodiment, no rotational resistance is generated after the balls 12be pass through the rotation transmission pulley 14, so the lowering speed of the bottom rail 4 may become too high depending on the configuration of the shielding device.

Therefore, in the present embodiment, as shown in FIG. 14, the balls 12bf are arranged so that the bottom rail 4 does not reach the lower limit position when the specific balls 12bf of the ball chain 12 pass through the rotation transmission pulley 14. The pitch at which the balls 12b are provided between the balls 12bf and the cord equalizer 10 is made large (for example, a double interval), and the cords (for example, the base cord 12a) that do not engage with the rotation transmission pulley 14 are provided between them. With such a configuration, since the rotation speed of the rotation transmission pulley 14 is reduced after the balls 12bf pass through the rotation transmission pulley 14, the rotation resistance generated by the rotation resistor 15 is reduced. Further, in the second embodiment, the rotation resistance suddenly disappears after the ball 12be has passed the rotation transmission pulley 14, but in the present embodiment, some rotation resistance remains even after the ball 12bf has passed the rotation transmission pulley 14. The lowering speed of the bottom rail 4 does not become too high. Therefore, according to the present embodiment, the bottom rail 4 can reach the lower limit position without the lowering speed of the bottom rail 4 becoming too high.

In the present embodiment, the pitch P _L at which the balls 12b are provided below the balls 12bf is preferably twice or more the pitch P _U above the balls 12bf. When it is more than 1 time and less than 2 times, when one ball 12b of two adjacent balls 12b is engaged with the recess 14c of the rotation transmission pulley 14, another ball 12b is engaged with the recess 14c. This is because they are likely to collide with the engaging projections 14a without being fitted. The pitch P _L is preferably an integral multiple (2 times, 3 times, etc.) of the pitch P _U.

(Fourth Embodiment)
A fourth embodiment of the present invention will be described with reference to FIG. This embodiment is similar to the first embodiment, and the differences will be mainly described below.

In the present embodiment, as shown in FIG. 15A, instead of the ball chain 12, a large-diameter cord 18 having a columnar shape and having a diameter larger than that of the lifting cord 9 is provided at the connecting portion 13 so that the plurality of lifting cords 9 It is connected to the. Further, as the rotation transmission pulley 14, as shown in FIG. 15(b), one having a configuration capable of engaging with the large diameter cord 18 is used.

The large-diameter cord 18 has a diameter larger than that of the elevating cord 9, and in one example, is configured by covering a core made of polyester resin or polyamide resin with an outer cord woven with polyester resin. With this structure, the linearity of the large-diameter cord 18 is ensured by the center core, the durability in the extending direction is ensured, and the collapse in the diameter reducing direction is prevented.

As shown in FIG. 15B, the rotation transmission pulley 14 includes first and second claws 117 and 118 that project outward in the radial direction, and a recess 17 is provided between the claws 117 and 118. .. A large number of claws 117 and 118 are provided at equal intervals in the circumferential direction. The claws 117 and 118 are provided with protrusions 117b and 118b protruding from the bases 117a and 118a toward the recessed portion 17, respectively, and by the protrusions 117b and 118b biting into the large diameter cord 18, the large diameter cord 18 rotates. The transmission pulley 14 is engaged. Further, since the claw portions 117 and 118 are alternately arranged in the circumferential direction, the large diameter cord 18 meanders and engages with the rotation transmission pulley 14, whereby the large diameter cord 18 and the rotation transmission pulley 14 are engaged. The holding force of the engagement is increased.

In the present embodiment, when the large diameter cord 18 moves toward the head box 1 as the bottom rail 4 is lowered by its own weight, the rotation transmission pulley 14 is rotated, and the rotation causes the rotation resistor 15 to rotate and rotate. Resistance is generated and the lowering speed of the bottom rail 4 is reduced.

Even when the rotation transmission pulley 14 is rotated using the large diameter cord 18 as in the present embodiment, the rotation resistance is reduced as the bottom rail 4 approaches the lower limit position as shown in the second to third embodiments. Can be configured to.

(Fifth Embodiment) Application to Winding Type A fifth embodiment of the present invention will be described with reference to FIGS. In the first to fourth embodiments, the rotation resistor is arranged outside the head box in the stringing type shielding device, but in the present embodiment, the rotation resistor is arranged in the head box in the winding type shielding device. It is located outside.

In the comb-up curtain shown in FIG. 16, a curtain material 32 is suspended and supported from a hollow head box 1 fixed to an upper frame of a window or the like, and a weight bar 33 is attached to a lower end of the curtain material 32. ..

A plurality of elevating cords 34 are suspended and supported from the head box 1, and the lower ends of the elevating cords 34 are attached to the lower end portion of the curtain material 32 via a mounting member 35.

The upper end of the lifting cord 34 is supported by the lifting cord winding device 36 arranged in the head box 1. Then, by operating the operation cord 37 formed of a loop-shaped ball chain hanging from one end of the head box 1 to drive the elevation cord winding device 36, the elevation cord 34 is wound up or rewound. Therefore, the curtain material 32 is moved up and down by operating the operation code 37.

An operating device 38 for driving the lifting cord winding device 36 by operating the operating cord 37 is attached to one end of the head box 1. The specific configuration of the operating device 38 will be described. As shown in FIG. 17A, an operating pulley 40 formed of synthetic resin is rotatably supported by a case 39 of the operating device 38, and the operating pulley 40 is provided. An operation code 37 is attached to the.

An output shaft 41 protruding toward the inside of the head box 1 is integrally formed at the center of the operation pulley 40, and a hexagonal rod-shaped drive shaft 42 is fitted to the tip end of the output shaft 41.

Therefore, when the operation pulley 40 is rotated, the drive shaft 42 is rotated, and the lifting cord winding device 36 winds or rewinds the lifting cord 34 based on the rotation of the driving shaft 42.

As shown in FIG. 18, the case 39 is formed with a substantially square tubular fitting insertion portion 43, and the fitting insertion portion 43 is fitted into the end portion of the head box 1. A stopper 44, which operates as a device for preventing the curtain fabric 32 from falling by its own weight, is fitted in the fitting portion 43. The case 45 of the stopper 44 is formed in a substantially cylindrical shape, and convex portions 46 are formed on the outer peripheral surface thereof at positions facing each other with the center therebetween.

A curved surface is formed on the inner surface of the fitting insertion portion 43 along the outer peripheral surface of the case 45 of the stopper 44, and the convex portions 46 of the case 45 are non-rotatably positioned on the inner surfaces of the four corners of the fitting insertion portion 43. A concave portion 47 is formed. The stopper case may not be fixed to the case as described above, but may be non-rotatably attached to the head box in a non-rotatable shape.

A drum 48 is rotatably supported in the case 45 of the stopper 44, and the output shaft 41 is inserted into the center of the drum 48 so as to be relatively non-rotatable. A plurality of split grooves are formed at the tip of the output shaft 41, and a spring piece 49 is formed between the split grooves. A barb 50 is formed at the tip of the spring piece 49, and the barb 50 prevents the stopper 44 fitted into the output shaft 41 from coming off the output shaft 41.

A guide groove 51 having a semicircular cross section is formed on the outer peripheral surface of the drum 48, and a slide groove 53 having a semicircular cross section is also formed on the inner peripheral surface of the case 45. Formed in the direction.

A clutch ball 55 made of a steel ball is arranged between the guide groove 51 and the slide groove 53. Therefore, when the drum 48 is rotated, the clutch ball 55 moves along the slide groove 53 while relatively rotating on the outer peripheral surface of the drum 48 along the guide groove 51.

The structure of the guide groove 51 will be described with reference to the development view shown in FIG. In FIG. 19, when the drum 48 is rotated in the pulling direction by the weight of the curtain material 32, the clutch ball 55 relatively moves on the guide groove 51 in the arrow A direction. When the drum 48 is rotated in the pull-down direction by the weight of the curtain material 32, the clutch ball 55 relatively moves on the guide groove 51 in the arrow B direction.

A pull-down groove 57 is formed on one side of the outer peripheral surface of the drum 48, and a pull-up groove 58 is formed on the other side. A first return groove 59 that branches in the arrow A direction communicates with the pull-down groove 57, and the first return groove 59 joins the pull-up groove 58 in the arrow A direction.

A stop groove 52 that branches in the direction of arrow B communicates with the pull-up groove 58, and the stop groove 52 becomes a dead end in the direction of arrow B at a locking portion 54, and the locking portion 54 extends in the direction of arrow A. It merges with the pull-down groove 57 via the second return groove 56.

In the stopper 44 thus configured, the clutch ball 55 moves in the pull-up groove 58 in the direction of arrow A when pulling up the curtain material 32. When the operation cord 37 is released after the curtain fabric 32 is pulled up to the desired position, the lifting cord 34 is rewound due to the weight of the curtain fabric 32, and the drum 48 is rotated via the drive shaft 42 and the output shaft 41. When the clutch ball 55 moves in the pull-up groove 58 in the direction of the arrow B, the clutch ball 55 engages with the locking portion 54 and further rotation of the drum 48 in the same direction is blocked. Therefore, in this state, the curtain fabric 32 is prevented from falling by its own weight.

From this state, when lowering the curtain material 32, by operating the ball chain and slightly raising the curtain material 32, the clutch ball 55 is pulled down from the engaging portion 54 through the second return groove 56. It is guided in the groove 57. Then, the clutch ball 55 can go around in the pull-down groove 57, so that the descent operation by the weight of the curtain material 32 can be performed.

Further, when the curtain material 32 is further pulled up from the state in which the clutch ball 55 is engaged with the locking portion 54, the clutch ball 55 is locked by operating the operation cord 37 in the pulling direction of the curtain material 32. It is guided from the portion 54 through the second return groove 56 into the pull-down groove 57, and further through the first return groove 59 into the pull-up groove 58. Therefore, the operation for pulling up the curtain material 32 by the operation code 37 can be performed.

As shown in FIGS. 16 to 18, a support rod 60 is attached to the case 39 of the operating device 38. The support rod 60 is a tubular body having an insertion hole 60a, and the operation cord 37 is inserted into the insertion hole 60a. The operation cord 37 is freely movable in the insertion hole 60a along the longitudinal direction of the support rod 60. As shown in FIG. 16, a support case (damper/pulley/assembly) 11 is attached to the lower end of the support rod 60. As shown in FIG. 16B, the rotation transmission pulley 14 and the rotation resistor 15 are housed in the support case 11 as in the first embodiment. In addition to the opening communicating with the hole 60a, an opening 11k for guiding the operation cord 37 upward is provided. When the loop-shaped operation cord 37 is inserted into the support case 11 as in the present embodiment, when the opening is formed downward, when the operation cord 37 makes a circular movement as the weight of the shielding material is lowered. There may be a problem that the operation code 37 is caught on the support case 11. On the other hand, by providing the opening of the support case 11 upward, such a catch can be prevented.

When the output shaft 41 of the operation pulley 40 rotates while the curtain material 32 descends by its own weight, the operation cord 37 engaged with the operation pulley 40 also moves around. Since the operation cord 37 is engaged with the rotation transmission pulley 14 housed in the support case 11, the rotation transmission pulley 14 rotates as the operation cord 37 revolves, and the rotation transmission pulley 14 rotates. As a result, the rotation resistor 15 generates a rotation resistance, and a braking force is applied to the orbital movement of the operation cord 37.

By the way, the support rod 60 is attached to the case 39 at a rotation shaft 62, and is rotatable about the rotation shaft 62 in a plane perpendicular to the drive shaft 42. With such a configuration, when the operation cord 37 is pulled obliquely toward the front (obliquely toward the inside of the room), the support rod 60 rotates and follows the direction in which the operation cord 37 is pulled. Therefore, the operation cord 37 is operated. The support bar 60 is less likely to get in the way when doing. The support rod 60 may be attached to the case 39 via a universal joint. In this case, since the support rod 60 rotates and follows the direction in which the operation cord 37 is pulled no matter which direction the operation cord 37 is pulled, the support rod 60 is even more obstructive when operating the operation cord 37. It is hard to become.

As described above, in the present embodiment, since the rotary resistor 15 is provided outside the head box 1, it is not necessary to secure a space for disposing the rotary resistor inside the head box 1. Therefore, the head box 1 can be downsized. Further, the shielding device of the present embodiment can be made smaller in the width direction (horizontal direction) of the shielding device, and thus can be applied to a window having a small width such as a slit window.

The present invention can also be implemented in the following modes.
-Instead of forming the support rod 60 into a cylindrical body, it may simply function as a rod that supports the support case (damper/pulley/assembly) 11. Even in this case, it is possible to suppress an increase in the descending speed of the curtain material 32 by moving the rotary resistor 15 along with the orbiting movement of the operation cord 37.
-The support case (damper/pulley/assembly) 11 is fixed to a body such as a wall surface adjacent to the shielding device/an object fixedly installed on the body (a window frame, etc.) similar to the support base 11a shown in Fig. 8. You may.

(Sixth Embodiment) Application to Roll Blinds A sixth embodiment of the present invention will be described with reference to FIGS. In the first to fifth embodiments, the rotary resistor is arranged outside the head box, but in the present embodiment, the rotary resistor is arranged outside the winding pipe that suspends and supports the screen as the shielding material. doing.

In the roller blind shown in FIG. 20, a frame 72 is supported by a mounting bracket 71 fixed to a mounting surface, and side brackets 73a and 73b are attached to both ends of the frame 72.

A hollow winding pipe 74 is rotatably supported between the side brackets 73a and 73b, a screen 75 is suspended from the winding pipe 74, and a weight bar 76 is attached to the lower end of the screen 75.
Then, when the take-up pipe 74 is rotated, the screen 75 is taken up or rewound on the take-up pipe 74.

Next, the structure of an elevating device for rotating the winding pipe 74 and elevating the screen 75 will be described.
As shown in FIG. 22, a support shaft 78 is fixed to the side bracket 73a. A driven gear 81 is rotatably supported on the support shaft 78, and a flange 82 larger than the maximum winding diameter of the screen 75 wound on the winding pipe 74 is provided at an end of the driven gear 81 on the winding pipe 74 side. It is formed integrally. The driven gear 81 is configured to rotate integrally with the winding pipe 74.

As shown in FIG. 21, a transmission gear 84 that meshes with the driven gear 81 is rotatably supported below the driven gear 81. Further, a drive gear 85 meshing with the transmission gear 84 is rotatably supported at a position diagonally below the transmission gear 84, that is, on the indoor side of the transmission gear 84.

An operation pulley 86 is integrally formed on one side of the drive gear 85, and the operation cord 37 formed of a loop ball chain is hooked on the operation pulley 86. Therefore, the operation pulley 86 is not positioned on the extension of the winding pipe 74, but is rotatably supported by a rotation axis different from the rotation axis of the winding pipe 74. The operation pulley 86 is located closer to the center of the roll blind than the drive gear 85. The operation cord 37 hung from the operation pulley 86 hangs forward of the screen 75, that is, toward the inside of the room.

A cap guide having a flange 88 similar to the flange 82 of the driven gear 81 is fitted to the other end of the winding pipe 74, and the cap guide is rotatably supported by the side bracket 73b. A stopper having the same structure as the stopper 44 of the fifth embodiment is provided at the other end of the winding pipe 74. However, in the fifth embodiment, the case 45 is immovable and the drum 48 is configured to rotate. However, in the present embodiment, the drum 48 is fixed to the fixed shaft 91 protruding from the side bracket 73b, and the case is fixed. By fixing 45 to the take-up pipe 74, the stopper 44 is configured to be operated and released in accordance with the rotation of the take-up pipe 74.

In the roll blind thus configured, when the operation cord 37 is operated to rotate the operation pulley 86 in the winding direction of the screen 75, the drive gear 85 is rotated integrally with the operation pulley 86, and the drive gear 85 is rotated. Then, the driven gear 81 is rotated via the transmission gear 84. The take-up pipe 74 is rotated with the rotation of the driven gear 81, and the screen 75 is taken up by the take-up pipe 74.

When the operation cord 37 is released, the take-up pipe 74 tries to rotate in the rewinding direction of the screen 75 due to the weight of the screen 75, but the stopper 44 operates to prevent the take-up pipe 74 from rotating. Then, when the operation cord 37 is operated to release the stopper 44, the screen 75 is rewound from the winding pipe 74, and the screen 75 descends by its own weight.

When the screen 75 descends by its own weight, the winding pipe 74 rotates, and the rotation is transmitted to the operation pulley 86 via the driven gear 81, the transmission gear 84, and the drive gear 85, and the operation pulley 86 is rotated.

As shown in FIG. 22, the rotary resistor 15 is arranged coaxially with the operation pulley 86. The case 15a of the rotation resistor 15 is non-rotatably supported by the support case 90 fixed to the side bracket 73a. On the other hand, the central shaft 15b of the rotation resistor 15 is configured to rotate with the rotation of the operation pulley 86. The central shaft 15b and the operation pulley 86 are rotatably supported by a support shaft 89 fixed to the side bracket 73a.

According to such a configuration, the rotation resistor 15 generates a rotation resistance as the screen 75 descends by its own weight, and thus the descending speed of the screen 75 by its own weight is reduced. The axis of input rotation of the rotary resistor 15 matches the axis of rotation of the operation pulley 86, and is different from the axis of rotation of the winding pipe 74. In this embodiment, since the rotary resistor 15 is not arranged inside the winding pipe 74, the winding pipe 74 can be downsized. Further, by making the rotation axis of the rotation resistor 15 different from that of the winding pipe 74, it is possible to reduce the widthwise (horizontal direction) dimension of the product, so that it can be applied to a window having a small width such as a slit window. Applicable.

The present invention can also be implemented in the following modes.
In the above-described embodiment, the rotation transmission train wheel including the driven gear 81, the transmission gear 84, and the drive gear 85 is arranged outside the cap of the winding pipe 74, and the rotation resistor 15 includes the drive gear 85. Against the rotation resistance. However, the rotation resistor 15 may be configured to generate rotation resistance with respect to another gear included in the rotation transmission train wheel. That is, the rotation resistor 15 may be configured to generate rotation resistance for any of the rotation transmission wheel trains arranged outside the cap of the winding pipe 74.

(Seventh Embodiment) Application to Pull-Down Roll Blinds A seventh embodiment of the present invention will be described with reference to FIG. This embodiment is similar to the sixth embodiment, and the differences will be mainly described below.

In the sixth embodiment, the screen 75 is raised and lowered by operating the operation cord 37, but in the present embodiment, the operation cord 37 and the operation pulley 86 are not provided, and the pull 94 provided on the screen 75 is gripped to move the screen 75. The screen 75 is configured to be raised directly by the urging force of the spring motor 92 that is stored when the screen 75 is pulled down.

Hereinafter, a specific configuration will be described. In the present embodiment, as shown in FIG. 24, the spring motor 92 and the stopper 44 are arranged in the winding pipe 74. Contrary to the above embodiment, the stopper 44 is configured to block the rotation of the winding pipe 74 in the winding direction. One end 92a of the spring motor 92 is fixed to the fixed shaft 91, and the other end of the spring motor 92 is fixed to the winding pipe 74 via the spring motor output plug 93. Similar to the sixth embodiment, the case 15a of the rotation resistor 15 is non-rotatably supported by the support case 90 fixed to the side bracket 73a. On the other hand, the central shaft 15b of the rotation resistor 15 is configured to rotate with the rotation of the winding pipe 74. Similar to the sixth embodiment, the take-up pipe and the rotary resistor have different rotary axes.

In the present embodiment, when the pull 94 is gripped and the screen 75 is pulled down, the winding pipe 74 rotates, and the rotation is transmitted to the spring motor 92 via the spring motor output plug 93, whereby the spring motor 92 is stored. Energized. In this state, the spring motor 92 biases the take-up pipe 74 in the take-up direction of the screen 75, and the take-up pipe 74 tends to rotate in the take-up direction of the screen 75. To keep the lower end of the screen 75 at the desired height. In order to raise the screen 75, when the screen 75 is pulled down a little and the stopper 44 is released, the spring motor 92 rotates the take-up pipe 74, the screen 75 is taken up by the take-up pipe 74, and the screen 75 is automatically raised. At this time, the central shaft 15b rotates relative to the case 15a, and the rising speed of the screen 75 is reduced.

Also in this embodiment, the rotation resistor 15 is arranged outside the winding pipe, and the rotation pipe cores of the winding pipe and the rotation resistor are different from each other, thereby reducing the size of the winding pipe and the widthwise dimension of the product. Can be reduced.

(Eighth Embodiment) Application to Automatic Ascending Type Shielding Device (Roll Blind) An eighth embodiment of the present invention will be described with reference to FIG. This embodiment is similar to the seventh embodiment, and the differences will be mainly described below.

As shown in FIG. 25, in the roller blind 80 of the present embodiment, support shafts 88a and 88b are provided on the pair of side brackets 73a and 73b, respectively, and the take-up pipe 74 is rotatable by the support shafts 88a and 88b. Supported by. An operation pulley 77 is rotatably supported by the support shaft 88a coaxially with the winding pipe 74. An operation cord 37 formed of a loop-shaped ball chain is hooked on the operation pulley 77. The outer peripheral surface of the operation pulley 77 has an uneven shape that engages with the balls of the operation cord 37, and when the operation cord 37 is engaged with the operation pulley 77, the operation cord 37 is rotated and the operation pulley 77 is rotated. Are synchronized. The first and second portions 37b of the operation cord 37 hang down from the operation pulley 77, and the take-up pipe 74 can be rotated in the rewinding direction of the screen 75 by pulling down the first portion 37a. The first and second portions 37a and 37b are connected by a lower end portion 87c.

A support case (damper/pulley assembly) 11 is fixed to a window frame 81 fixedly installed on a wall surface adjacent to the roller blind 80. The internal structure of the support case 11 is the same as that of the support case 11 of the first embodiment, and the rotation transmission pulley 14 and the rotation resistor 15 are housed in the support case 11 as in the first embodiment (FIG. 4 to 7). The rotation transmission pulley 14 is engaged with the operation cord 37 near the lower end of the first portion 37a of the operation cord 37.

Inside the winding pipe 74, the stopper 44 and the spring motor 92 having the same configuration as in the seventh embodiment are arranged.

The operation of the roller blind 80 according to this embodiment will be described below.
When the first portion 37a of the operation cord 37 is pulled down while the screen 75 is at the upper limit position, the take-up pipe 74 rotates in the rewinding direction of the screen 75 and the spring motor 92 stores energy while the screen 75 rewinds. It goes down.

Next, when the operation cord 37 is released, the winding pipe 74 starts to rotate in the winding direction of the screen 75 (direction of arrow U in FIG. 25B) by the urging force of the spring motor 92. When the take-up pipe 74 slightly rotates, the stopper 44 is activated to prevent the take-up pipe 74 from rotating and prevent the screen 75 from being automatically raised.

When the first portion 37a of the operation cord 37 is further pulled down in this state, the stopper 44 is released. Then, when the hand is released from the operation cord 37 in this state, the screen 75 is automatically raised when the winding pipe 74 is rotated in the winding direction of the screen 75 by the urging force of the spring motor 92.

When the take-up pipe 74 rotates in the take-up direction of the screen 75, the take-up pipe 74 and the operation pulley 77 rotate integrally with each other, and the operation cord 37 moves circularly as the operation pulley 77 rotates. Then, the rotation transmission pulley 14 and the rotation resistor 15 are rotated in accordance with the circular movement of the operation cord 37 to generate rotation resistance, and the automatic rising speed of the screen 75 is reduced.

(Ninth Embodiment) Application to self-weight lowering type roller blind A ninth embodiment of the present invention will be described with reference to FIG.

In the configuration of the roller blind 80 of the present embodiment, the spring motor 92 is not arranged in the winding pipe 80, and the rotation transmission pulley 14 is attached to the operation cord 37 near the lower end of the second portion 37b of the operation cord 37. It is the same as the eighth embodiment except that it is engaged and the stopper 44 is configured to prevent the screen 75 from descending by its own weight.

The operation of the roller blind 80 according to this embodiment will be described below.
When the second portion 37b of the operation cord 37 is pulled down while the screen 75 is at the lower limit position, the take-up pipe 74 rotates in the take-up direction of the screen 75 and the screen 75 is taken up by the take-up pipe 74 and rises. To do.

Next, when the hand is released from the operation code 37, the take-up pipe 74 starts to rotate in the rewinding direction of the screen 75 (direction of arrow D in FIG. 26B) by the weight of the screen 75 and the weight bar 76. When the take-up pipe 74 slightly rotates, the stopper 44 is activated to prevent the take-up pipe 74 from rotating. This action prevents the screen 75 from lowering its own weight.

In this state, when the second portion 37b of the operation cord 37 is further pulled down, the stopper 44 is released. Then, when the hand is released from the operation cord 37 in this state, the take-up pipe 74 rotates in the rewinding direction of the screen 75 by the own weight of the screen 75 and the weight bar 76, and the screen 75 descends by its own weight.

When the take-up pipe 74 rotates in the rewinding direction of the screen 75, the take-up pipe 74 and the operation pulley 77 rotate integrally with each other, and the operation cord 37 moves circularly as the operation pulley 77 rotates. Then, the rotation transmission pulley 14 and the rotation resistor 15 are rotated as the operation cord 37 revolves, rotation resistance is generated, and the self-weight lowering speed of the screen 75 is reduced.

(Tenth Embodiment) Centrifugal Governor A tenth embodiment of the present invention will be described with reference to FIGS. 27 to 28. This embodiment is similar to the first embodiment, and is characterized in that the rotary resistor 15 is a centrifugal governor.

The rotary resistor 15 of the present embodiment includes a case 15a, a central shaft 15b arranged inside the case 15a, and a pair of centrifugal bodies 66. As shown in FIG. 27(c), the pair of centrifugal bodies 66 has a base end 66a axially supported by a pivot pin 68 positioned so as to face the center of rotation of the base portion 64a of the central shaft 15b. 27C, it has an arc shape when viewed from the direction of FIG. 27C, and the end portion on the opposite side of the base end 66a is an open end 66b. A brake chip 66c is embedded on the outer peripheral surface side of the centrifugal body 66 so as to face the inner peripheral surface of the case 15a. The brake chip 66c is made of a friction material such as urethane rubber for generating appropriate friction with the inner peripheral surface of the case 15a without damaging the inner peripheral surface of the case 15a. The open end 66b of the centrifugal body 66 is constantly urged in the inner diameter direction by an urging means (not shown).

When the central shaft 15b rotates as the shielding material descends, as shown by the arrow in FIG. 27(d), the centrifuge body 66 rotating together with the central shaft 15b has the open end 66b side as the leading end rather than the base end 66a side. That is, in other words, the central shaft 15b rotates relative to the case 15a in the direction toward the open end 66b in the direction from the fulcrum pivotally supported by the rotating pin 68 toward the sliding contact with the brake chip 66c. The centrifugal body 66 is set so that

As a result, when the shielding member descends, the centrifugal body 66 rotates together with the central shaft 15b, the open end 66b of the centrifugal body 66 opens outward in the radial direction due to the centrifugal force, and the brake tip 66c of the centrifugal tip 66c is rotated to the inner peripheral surface of the case 15a. It comes into sliding contact with and generates a frictional force, which brakes the descent of the shielding material. During this operation, the centrifugal body 66 receives a frictional force F from the inner peripheral surface of the case 15a at the sliding contact as shown in FIG. 27(d). The brake tip 66c of the centrifugal body 66 is urged in a direction of sliding contact with the case 15a to stably generate a frictional force between the centrifugal body 66 and the case 15a. Can be generated.

As shown in FIG. 28, the rotation resistor 15 is supported by the support case 11. More specifically, the support case 11 includes a support base 11a and a cover 11b. The support base 11a rotatably supports the rotation transmission pulley 14, and the rotation transmission pulley 15 has a fitting hole 14e in which a rotation resistor 15 is provided. A damper pulley assembly is constructed by fitting the central shaft 15b of the above.

A rotation restricting groove 15e is provided on the outer surface of the case 15a. The rotation restricting grooves 15e are provided at four locations at equal intervals in the circumferential direction. The cover 15b shown in FIG. 28 is provided with a rotation restricting protrusion (not shown) that engages with the rotation restricting groove 15e, and the rotation of the case 15a relative to the cover 15b due to the engagement of the rotation restricting groove 15e and the rotation restricting protrusion. Rotation is blocked.

Similarly to the first embodiment, when the ball chain 12 is driven as the weight of the shielding material descends, the rotation transmission pulley 14 engaged with the ball chain 12 rotates, and this rotation is input to the central shaft 15b. The rotation resistor 15 generates rotation resistance.

1: Head box, 2: Ladder cord, 3: Slat, 4: Bottom rail, 5: Support member, 6: Drum, 7: Angle adjusting shaft, 8: Operation rod, 9: Lifting cord, 10: Cord equalizer, 11 : Support case, 12: Ball chain, 13: Connection part, 14: Rotation transmission pulley, 15: Rotation resistor, 16: Stopper part, 18: Large diameter cord, 19: Tensile cord, 19s: Tensile cord supporting side, 19o: Operating side of tension cord, 37: Operating cord, 38: Operating device, 40: Operating pulley, 60: Support rod, 74: Winding pipe, 75: Screen, 81: Driven gear, 84: Transmission gear, 85: Drive gear, 86: operation pulley, 89: support shaft, 90: support case

Claims (16)

A rotating resistor is provided outside a hollow support body that suspends and supports the shielding material and has a space inside, and the shielding material is automatically moved by the rotation resistance generated by the rotating resistor along with the automatic movement of the shielding material. A shielding device configured to add resistance to
The hollow support is a head box,
In the shielding device, a supporting side and an operating side of the tension cord are led out from the head box, and the operation of the operating side of the tension cord changes the lead-out length of the supporting side of the tension cord to raise and lower the shielding material. A shielding device,
The rotation resistor is configured to rotate with the movement of the tension cord,
The rotational resistance member is supported to the head box or al suspension supported support rod, shielding device. The shielding device according to claim 1, wherein the rotation resistor is provided at a tip portion of the support rod. The rotation resistor is supported by a support rod suspended from the head box,
The shielding device according to claim 2, wherein the support rod is a tubular body having an insertion hole, and the tension cord is inserted into the insertion hole. The shielding device according to claim 3, wherein the case of the rotation resistor is rotatable with the support rod. The shielding device according to claim 1 or 2, wherein the tension cord is not inserted through the support rod, and the case of the rotation resistor is provided so as to be rotatable relative to the support rod. The shielding device according to any one of claims 1 to 5, wherein the support rod is supported so as to be rotatable at least in the front-rear direction or the left-right direction with respect to the head box. The support rod is rotatably supported with respect to the head box about an axis of the support rod, and the rotation of the support rod is transmitted to an angle adjusting shaft provided in the head box. The shielding device according to claim 6, which is configured. A rotating resistor is provided outside a hollow support body that suspends and supports the shielding material and has a space inside, and the shielding material is automatically moved by the rotation resistance generated by the rotating resistor along with the automatic movement of the shielding material. A shielding device configured to add resistance to
The hollow support is a head box or a winding pipe,
The shielding device is a shielding device that raises and lowers the shielding material by operating a loop-shaped operation cord mounted on an operation pulley,
The operation pulley is supported so as to be rotatable relative to the head box, or is supported so as to be rotatable relative to a side bracket that supports the winding pipe in a rotatable manner,
The said rotation resistor is a shielding apparatus comprised so that it may rotate with the movement of the said operation code. The shielding device according to claim 8, wherein the rotation resistor is supported by a support rod suspended from the head box or the side bracket. The shielding device according to claim 9, wherein the support bar is rotatably supported at least in the front-rear direction or the left-right direction with respect to the head box or the side bracket. The support rod is rotatably supported with respect to the head box about an axis of the support rod, and the rotation of the support rod is transmitted to an angle adjusting shaft provided in the head box. The shielding device according to claim 10, wherein the shielding device is configured. A rotating resistor is provided outside a hollow support body that suspends and supports the shielding material and has a space inside, and the shielding material is automatically moved by the rotation resistance generated by the rotating resistor along with the automatic movement of the shielding material. A shielding device configured to add resistance to
The shielding device, wherein the rotation resistor is supported by a body adjacent to the shielding device or is supported by an object other than the shielding device fixedly set on the body. A rotating resistor is provided outside a hollow support body that suspends and supports the shielding material and has a space inside, and the shielding material is automatically moved by the rotation resistance generated by the rotating resistor along with the automatic movement of the shielding material. Is configured to add resistance to
The hollow support is a head box,
The rotation resistor and the member supporting it are independent of the head box and can be retrofitted or removable,
The rotation resistor is provided in the grip,
The said grip is a shielding apparatus which can be retrofitted to the cylindrical body suspended from the said head box and which has an insertion hole. A rotating resistor is provided outside a hollow support body that suspends and supports the shielding material and has a space inside, and the shielding material is automatically moved by the rotation resistance generated by the rotating resistor along with the automatic movement of the shielding material. Is configured to add resistance to
The hollow support is a head box,
The rotation resistor and the member supporting it are independent of the head box and can be retrofitted or removable,
The rotation resistor is provided in the grip,
The grip is mounted on a cylindrical body that is suspended from the head box and has an insertion hole,
The said cylindrical body is a shield device which can be attached or detached with respect to the said head box. A code that follows the automatic movement of the shielding material,
A pulley housed in a case and capable of inserting and removing the cord,
The pulley is configured to rotate according to the driven of the cord to apply an input rotation to the rotation resistor,
The shielding device according to claim 13 or 14, wherein the pulley and the rotation resistor are an assembly. The shielding device according to claim 15, wherein the assembly is configured to be rotatably attached to a support rod suspended from the head box.