JP2019138119A - Stopper device of blind - Google Patents

Abstract

To provide a stopper device of a blind capable of closing a shield member by a rotation of a drive shaft in an embodiment with excellent practicability.SOLUTION: A stopper device of the invention 6 comprises an input shaft member 65 for inputting a shaft rotation based on a closing operation of a shield member (slat 4), an output shaft member 62 for rotating by being transmitted the rotation of the input shaft member 65 and coupling to a drive shaft 11 to close the shield member without being able to rotate relatively, a brake means for imparting brake force relative to the rotation of the input shaft member 62 (brake spring 63, spring case 64) and a case housing 61 and a cap 66 for accommodating the input shaft member 65, the output shaft member 62 and the brake means. The case housing 61 and the cap 66 are fit with a lid by a rotation engagement each other.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a blind stopper device that opens and closes a shielding member by rotation of a drive shaft.

  As one type of blind, the drive shaft is rotated by operating an endless operation cord suspended from one end of the head box, and the shielding material is opened and closed (e.g. lifted) by the rotation of the drive shaft There is.

  Examples of such blinds that move the shielding member by rotating the drive shaft include horizontal blinds, vertical blinds, roll blinds (roll screens), and pleated screens.

  Typically, a horizontal blind that raises and lowers a slat by rotation of a drive shaft is known. The horizontal blind has a tilt drum attached to a drive shaft that is rotatably supported in a head box. The ladder cord is suspended and supported. The tilt drum rotates the slats based on the rotation of the drive shaft, and prevents further rotation of the slats when each slat is rotated in the horizontal direction.

  Also, the lifting / lowering cord is suspended and supported by the lifting / lowering drum that rotates integrally with the drive shaft, and the slat is lifted / lowered by winding the lifting / lowering cord around the lifting / lowering drum based on the rotation of the driving shaft. It has become.

  The rotation of the drive shaft is operated by an operation code. For example, an endless operation cord is mounted on a pulley that is rotatably supported by the head box, and the rotation of the pulley is transmitted to the drive shaft through the gear box. When the pulley is rotated by operating the operation cord, the drive shaft is rotated, and the slat can be rotated and lifted by the rotation of the drive shaft.

  Such a horizontal blind is provided with an operating device with a stopper device that prevents the slat from falling by its own weight when the operating cord is not operated (see, for example, Patent Document 1). This stopper device is provided between the output shaft and drive shaft of the gear box that constitutes a part of the operating device, transmits the rotation of the output shaft of the gear box to the drive shaft, and is driven by a load acting on the drive shaft. Operates to prevent rotation of the shaft.

  More specifically, the conventional stopper device disclosed in Patent Document 1 includes a brake drum and a clutch spring. When the clutch spring is wound around the brake drum and the pulley is rotated by the operation of the operation cord, the clutch spring The slat can be lifted and lowered by reducing the friction with the brake drum. Further, when the operation cord is not operated, the slat is prevented from dropping its own weight by the frictional force between the brake drum and the clutch spring.

  In the stopper device disclosed in Patent Document 1, the brake drum is formed of a cylindrical sleeve housing, a one-way clutch is formed inside the sleeve housing, and the sleeve housing is only rotated by rotating the slat in the pulling direction. It is configured to rotate integrally with the clutch spring. Further, the clutch spring in the conventional stopper device disclosed in Patent Document 1 also functions as a brake spring that generates a braking force against the rotation of the drive shaft.

JP 2010-101007 A

  As described above, in the conventional stopper device, a brake spring that generates a braking force with respect to the rotation of the drive shaft is wound around the brake drum, and the frictional force prevents the slat from dropping its own weight, and the operation cord When the pulley is rotated by the operation, the slat can be lifted and lowered by expanding the diameter of the brake spring and reducing the friction with the brake drum.

  Briefly, the conventional stopper device includes an input shaft member connected to the output shaft of the gear box and an output shaft member connected to the drive shaft, and a brake spring is wound around a brake drum constituting the output shaft member. Thus, a braking force is generated with respect to the rotation of the drive shaft, and the brake spring is expanded in diameter by the rotation of the input shaft member, thereby relaxing the braking force.

  In the conventional technique, the case of the stopper device for accommodating the input shaft member, the brake spring, and the output shaft member is composed of two members, a case housing and a cap, and the case housing and the cap are axially arranged. It is carried out so as to carry out the casing by push fitting that pushes in (or is perpendicular to the axis) and fits.

  However, with respect to the case of the stopper device, in the case of a push-fitting casing in which the case housing and the cap are pushed and fitted in the axial direction (or the vertical direction perpendicular to the axial direction), the case housing and the cap have a temperature or Since the shape may be deformed due to changes in humidity, the fitting force may be weakened. As a result, the fitting may be disengaged, or a gap may be generated and the brake operation may deteriorate due to the inclusion of dust or dirt.

  Further, in the casing of the conventional technique, a structure that supports only the shaft portion of the input shaft member or the output shaft member by the case housing and the cap is inevitable, and the axial force related to the brake operation and the operating force in the vertical direction or A shaft shake of the output shaft member may occur due to the inertial force, and the operability of the input shaft member may deteriorate.

  Therefore, as a stopper device, the sealing performance to improve the environmental resistance and dust resistance of the casing, and the resistance to the axial or vertical operating force or inertia force related to the brake operation, that is, the operability or the brake operation. Further improvement in performance is required from the viewpoint of the stability of the shaft center, and a technique for improving the assemblability after achieving these performance improvements is desired.

  In view of the above-described problems, an object of the present invention is to provide a blind stopper device that opens and closes a shielding material by rotation of a drive shaft in a mode excellent in practicality.

  A blind stopper device according to the present invention is a blind stopper device that opens and closes a shielding material by rotation of a drive shaft, an input shaft member that inputs shaft rotation based on an opening / closing operation of the shielding material, and the input shaft member An output shaft member that is rotated by being transmitted and connected to the drive shaft so as not to rotate relative thereto, a braking means that applies a braking force to the rotation of the output shaft member, the input shaft member, and the output shaft member And a case housing and a cap for accommodating the braking means, wherein the case housing and the cap are covered with each other by rotational fitting.

  Also, in the blind stopper device of the present invention, the cap has a cylindrical portion for accommodating the input shaft member, the output shaft member, and the braking means, and a predetermined location on the outer peripheral surface of the cylindrical portion. The case housing has a peripheral wall that tightly covers and covers the cylindrical portion, a guide groove that guides to the rotary fitting corresponding to the claw portion on the peripheral wall, and the rotary fit Fitting parts for fitting the claw parts are formed respectively.

  In the blind stopper device of the present invention, the guide groove and the claw portion have an inclined taper portion that leads to the rotation fitting.

  Further, in the blind stopper device of the present invention, the braking means has a brake spring that applies a braking force by pressing in the diameter-enlarging direction against the cap itself or a spring case to which the cap is fixed. And

  In the blind stopper device of the present invention, the input shaft member has an input shaft portion for inputting shaft rotation based on an opening / closing operation of the shielding material, and an input side flange connected to the input shaft portion, and at least the The input shaft portion and the input side flange are rotatably supported by the cap.

  Further, in the blind stopper device of the present invention, the output shaft member has an output shaft portion connected to the drive shaft so as not to be relatively rotatable, and an output side flange connected to the output shaft portion, and at least the output shaft portion. And the output side flange is rotatably supported by one or both of the case housing and the cap.

  Further, in the blind stopper device of the present invention, the input shaft member has a double crotch-like connecting portion for connecting to an operating-side shaft based on the opening / closing operation of the shielding material, and the shaft connection at the connecting portion The portion has a rounded corner portion with a rounded shape.

  In the blind stopper device of the present invention, the case housing has an engagement recess that engages with a projection of an assembly jig for assisting the rotation fitting. .

  In the blind stopper device of the present invention, the case housing has an engaging recess that engages with a protruding portion of an assembly jig for assisting the rotational fitting.

  The blind stopper device according to the present invention further includes a one-way clutch that transmits only rotation in one direction of the input shaft member to the output shaft member.

  ADVANTAGE OF THE INVENTION According to this invention, the stopper apparatus of the blind which opens and closes a shielding material by rotation of a drive shaft can be comprised with the aspect excellent in practicality.

It is a front view which shows schematic structure of the horizontal blind provided with the stopper apparatus of one Embodiment by this invention. It is a perspective view regarding the assembly | attachment of the stopper apparatus of one Embodiment by this invention. It is a disassembled perspective view of the stopper apparatus of one Embodiment by this invention. It is a disassembled perspective view of the stopper apparatus of one Embodiment by this invention. It is sectional drawing for demonstrating operation | movement of the stopper apparatus of one Embodiment by this invention. (A), (b), (c) is a perspective view of a case housing and a cap, a sectional view of the case housing, and a left side view of the cap, respectively, in the stopper device according to one embodiment of the present invention. It is explanatory drawing of the rotation fitting of the case housing and cap in the stopper apparatus of one Embodiment by this invention. (A), (b) is explanatory drawing of the comparative examples 1 and 2 which illustrate the indentation fitting which concerns on the casing based on a conventional technique, respectively. (A), (b) is the left view in the stopper apparatus of one Embodiment by this invention, respectively, and A-A 'sectional drawing. (A), (b) is the right view in the stopper apparatus of the comparative example based on a prior art, respectively, and B-B 'sectional drawing.

  Hereinafter, a stopper device according to an embodiment of the present invention will be described with reference to the drawings, taking as an example a horizontal blind that enables a slat lifting operation by a lifting cord and a slat tilting operation by a ladder cord by rotation of a drive shaft. . In the present specification, with respect to the front view of the horizontal blind shown in FIG. 1, the upper side and lower side are defined as upward (or upper) and lower (or lower), respectively, and the left direction is horizontal. The left side of the blind and the right direction in the figure are defined as the right side of the horizontal blind. Moreover, let the side which visually recognizes the front view of FIG. 1 be a front side (indoor side), and let the opposite side be a rear side (or outdoor side).

(Blind configuration)
FIG. 1 is a front view showing a schematic configuration of a horizontal blind provided with a stopper device 6 according to an embodiment of the present invention. In the horizontal blind shown in FIG. 1, a plurality of cord support devices 5 in the head box 1 are disposed, and the operation device 2 is disposed on the right end side in the head box 1.

  The cord support device 5 suspends and supports a plurality of slats 4 via ladder cords 9, and a bottom rail 8 is suspended and supported at the lower end of each ladder cord 9. The head box 1 is fixed to a ceiling-side mounting surface via a bracket 7.

  Further, a cord-like lifting / lowering cord 10 is suspended from the cord support device 5 at a substantially central portion in the front-rear direction on the lower surface of the head box 1, and a lower end of the lifting / lowering cord 10 is provided at a substantially central portion in the front-rear direction of each slat 4. It is attached to the bottom rail 8 through an insertion hole (not shown).

  For this reason, the cord support device 5 includes a tilt drum 51 having a V-shaped groove on which the ladder cord 9 is hung, and a long cylindrical winding having an inclination that allows the lifting / lowering cord 10 to be wound or unwound. The take-up drum 52 is arranged side by side on the square rod-like drive shaft 11 and is supported by the support case 50. In this example, an obstacle detection stop device 53 is provided on the leading end side of the winding drum 52. The obstacle detection stop device 53 is a device for preventing the winding drum 52 supporting the lifting / lowering cord 10 from rotating when the pulling cord 10 is not pulled in the pulling direction. When 8 collides with an obstacle, the rewinding of the lifting / lowering cord 10 is stopped, the descent of the slat 4 and the bottom rail 8 is stopped, and the reverse winding of the lifting / lowering cord 10 is prevented.

  An operation device 2 is provided on the right end side in the head box 1. In the case of the manual type shown in the figure, the operation device 2 has a pulley (not shown) on which an endless string-like operation cord 3 (or an endless ball chain may be hung) can be hooked. The operation code 3 is led out to enable the drive shaft 11 to be rotated.

  Alternatively, when the operation device 2 is an electric type, an electric motor that can rotate the drive shaft 11 based on an operation signal from the outside can be used. Therefore, the configuration of the controller device 2 can be any configuration as long as it can be transmitted to the rotation of the drive shaft 11 according to the operation by the operator.

  Therefore, the horizontal blind shown in FIG. 1 operates the operation cord 3 to rotate the drive shaft 11, and rotates the tilt drum 51 in each cord support device 5 as the drive shaft 11 rotates. Tilt operation to adjust the angle is possible. When the drive shaft 11 is rotated, the take-up drum 52 in the cord support device 5 is also rotated, and an elevating operation for raising or lowering the slat 4 is possible.

  By the way, in the horizontal blind shown in FIG. 1, a stopper that prevents the slat 4 from dropping by its own weight when the operation cord 3 is not operated, between the output shaft of the gear box 20 that constitutes a part of the operation device 2 and the drive shaft 11. A device 6 is provided. This stopper device 6 generates a braking force against the rotation of the drive shaft 11 to prevent the slat 4 from falling by its own weight, and when the output shaft of the gear box 20 rotates in accordance with the rotation of the pulley by the operation of the operation cord 3. The braking force is alleviated and the rotation of the output shaft of the gear box 20 is transmitted to the drive 11.

(Stopper device)
Hereinafter, the structure and operation of the stopper device 6 according to an embodiment of the present invention will be described in more detail.

  In FIG. 2, the perspective view regarding the assembly | attachment of the stopper apparatus 6 of one Embodiment by this invention is shown. 3 and 4 are exploded perspective views of the stopper device 6 according to an embodiment of the present invention.

  As shown in FIGS. 3 and 4, although details will be described later, the stopper device 6 according to an embodiment of the present invention includes an output shaft member 62, a brake spring 63, a spring case 64, and an input shaft member 65. A case housing 61 and a cap 66 are configured to be accommodated.

  First, referring to FIG. 2, the operating device 2 has a pulley 30 on which an endless string-like operation cord 3 can be hooked, and a gear box 20 that constitutes a part of the operating device 2 is connected to the pulley 30. A gear mechanism (not shown) for converting the speed of rotation at a predetermined transmission ratio and transmitting the rotation to the output shaft 31 of the gear box 20 is housed. On the left end surface of the gear box 20, a bearing that is opened and supported to connect the output shaft 31 of the gear box 20 and the input shaft portion 655 (see FIGS. 3 and 4) of the input shaft member 65 in the stopper device 6. A portion 23 is provided. Note that the left end portion of the output shaft 31 of the gear box 20 cannot be relatively rotated with a connecting portion 656 (see FIGS. 3 and 4) formed on the right end portion of the input shaft portion 655 and having a forked shape. Similarly, three-pronged irregularities are formed so as to be connected and engaged.

  The left end surface of the gear box 20 is provided with a pair of claw-shaped claw portions 22 and a pair of screw holes 21 arranged symmetrically about the output shaft 31 by 180 degrees.

  On the other hand, the case housing 61 and the cap 66 in the stopper device 6 according to the embodiment of the present invention are configured to accommodate the output shaft member 62, the brake spring 63, the spring case 64, and the input shaft member 65 and to be fitted to each other. The First, the cap 66 is provided with a bearing portion 661 that rotatably supports the input shaft portion 655 of the input shaft member 65 (see FIGS. 3 and 4). The right end base portion of the cap 66 has a bearing portion 661 that is opened in a circular shape so that the input shaft portion 655 of the input shaft member 65 is rotatably supported and exposed. A pair of claw-shaped claw portions 668 and a pair of through-holes 667 arranged symmetrically in degrees are provided.

  Thus, when the stopper device 6 is attached to the left end surface of the gear box 20, the connecting portion 656 of the input shaft portion 655 and the output shaft 31 of the gear box 20 are connected and engaged so as not to rotate relative to each other. While adjusting, the pair of claw portions 668 of the cap 66 in the stopper device 6 can be positioned by meshing with the pair of claw portions 22 in the gear box 20, and then the through holes 667 of the caps 66 are formed. The stopper device 6 can be fixed to the left end surface of the gear box 20 by screwing the mounting screw 40 into the screw hole 21.

  Here, in the stopper device 6 according to the embodiment of the present invention, on the outer peripheral surface of the case housing 61, the housing 66 corresponds to each of the housing connection portions by the pair of claw portions 668 and the pair of through holes 667 of the cap 66. In this example, a flat assembling avoidance portion 613 is formed at the position to be. When the mounting screw 40 is screwed into the screw hole 21 through the through hole 667 of the cap 66, each of the through holes 667 is shaped so as to avoid the mounting screw 40 (in this example, flat) in order to improve the assembly property. On the other hand, forming the assembling avoidance portion 613 at a corresponding position has been conventionally performed and is common.

  However, in the stopper device 6 according to the embodiment of the present invention, the assembly avoiding portions 613 are formed at positions corresponding to the claw portions 668 on the outer peripheral surface of the case housing 61. This is because when the pair of claw portions 668 of the cap 66 are engaged with the pair of claw portions 22 in the gear box 20, the connection portion 656 of the input shaft portion 655 and the output shaft 31 of the gear box 20 are connected. It is necessary to adjust the engagement, so that the adjustable range is expanded to improve the assemblability (preventing the adjustable range from being restricted), or the claw portion 22 collides with the outer peripheral surface of the case housing 61. It has the effect of preventing breakage.

  Therefore, the stopper device 6 according to the embodiment of the present invention corresponds to each housing connection portion by the pair of claw portions 668 and the pair of through holes 667 of the cap 66 on the outer peripheral surface of the case housing 61. By having the assembling avoidance part 613 at the position, the assembling property with respect to the gear box 20 is improved.

  The case housing 61 is provided with a bearing portion 611 that rotatably supports and exposes the output shaft portion 621 of the output shaft member 62 (see FIGS. 3 and 4). A square hole (in this example, a square hole) 622 formed through the bearing portion 611 in the central axis engages the drive shaft 11 so as not to be relatively rotatable.

  Next, the structure of the stopper device 6 according to an embodiment of the present invention will be described in detail with reference to FIGS. The stopper device 6 includes a case housing 61, an output shaft member 62, a brake spring 63, a spring case 64, an input shaft member 65, and a cap 66. The stopper device 6 generates a braking force against the rotation of the drive shaft 11 by the output shaft member 62, the brake spring 63, the spring case 64, and the input shaft member 65, and prevents the slat 4 from dropping its own weight. When the output shaft 31 of the gear box 20 rotates along with the rotation of the pulley by the operation of the cord 3, the braking force is alleviated and the rotation of the output shaft 31 of the gear box 20 is transmitted to the drive 11. ing.

  Hereinafter, a specific structure of the case housing 61, the output shaft member 62, the brake spring 63, the spring case 64, the input shaft member 65, and the cap 66 will be described with reference to the assembly thereof.

  First, the cap 66 has, at the right end base portion thereof, a bearing portion 661 that is opened in a circular shape so that the input shaft portion 655 of the input shaft member 65 is rotatably supported and exposed, and the bearing portion 661 is the center. A pair of claw-shaped claw portions 668 and a pair of through holes 667 arranged symmetrically about 180 degrees are provided. An annular external step 669 is formed on the right surface of the right end base of the cap 66 (see FIG. 4) so as to abut and receive the flat right end surface of the gear box 20. By forming this annular outer step 669, the vibration of the stopper device 6 in the axial direction is suppressed, and the contact friction is reduced as compared with the case where the surfaces are simply contacted with each other, and the receiving accuracy is further improved. Is easily realized.

  The cap 66 is formed with a cylindrical portion 662 extending in the left-axis direction from a right end base portion provided with a pair of claw portions 668 and a pair of through holes 667. Inside the cylindrical portion 662, a spring case 64, The brake spring 63, the input shaft member 65, and the output shaft member 62 are accommodated. More specifically, first, a pair of convex portions 663 formed opposite to each other on the inner peripheral wall of the cylindrical portion 662 of the cap 66 and a spring case 64 made of a hard material (for example, a metal material or a hard resin material). The spring case 64 is fitted on the inner peripheral wall of the cylindrical portion 662 so as not to rotate relative to the recess 641. Here, the thickness of the convex portion 663 and the thickness of the spring case 64 are substantially the same, and there is almost no step between the convex portion 663 and the spring case 64. When the cap 66 is made of a hard material (for example, a metal material or a hard resin material), it may be formed integrally with the spring case 64. However, according to the structure of the stopper device 6 of the present embodiment, the spring case 64 is made of a hard material, but other members excluding the brake spring 63 (case housing 61, cap 66, input shaft member 65, and output shaft member) 62) can be molded from an inexpensive resin material, which is advantageous in that the cost can be reduced as compared with the conventional technique.

  Next, the input shaft member 65 is placed inside the cylindrical portion 662 of the cap 66. Here, the cap 66 rotatably supports the input shaft portion 655 that protrudes rightward in the axial direction from the flange 652 of the input shaft member 65 on the bearing portion 661, and at the circular flange 652 of the input shaft member 65. An annular inner circumferential step 664 positioned around the bearing portion 661 is formed on the bottom surface (the left surface in the cylindrical portion 662 of the right end base portion) inside the cylindrical portion 662 of the cap 66 so as to receive the flat right surface in contact. And the annular | circular shaped inner periphery level | step difference 665 located in the inner peripheral wall right end part of the said cylindrical part 662 is each formed in substantially the same height. By forming these annular inner circumferential steps 664 and 665, the vibration of the input shaft member 65 in the axial direction is suppressed, and the contact friction is reduced as compared with the case where the surfaces are simply contacted with each other. The receiving accuracy can be easily improved. The periphery of the flange 652 of the input shaft member 65 is rotatably supported by the inner peripheral wall of the spring case 64 and the inner peripheral wall of the cylindrical portion 662 of the cap 66. For this reason, the cap 66 prevents axial blurring of the input shaft member 65 with respect to the operating force or inertial force in the axial direction and the vertical direction related to the brake operation, and as a result, the operability can be improved. it can.

  Next, the brake spring 63 is placed on the inner surface of the spring case 64 fitted to the inner peripheral wall of the cylindrical portion 662 of the cap 66. Here, the brake spring 63 is placed so as to generate a biasing force that always presses against the inner surface of the spring case 64 (that is, it is placed so as to always generate a frictional force). Further, each end portion 631 of the brake spring 63 is between the opposing end portions of a pair of projecting pieces 653 projecting from the recessed surface 654 on the left surface side of the flange 652 of the input shaft member 65 so as to face each other in the axial direction. Position. A circular through hole 651 is provided on the central axis of the input shaft member 65 so that the drive shaft 11 can be passed through in a non-engagement manner. Each protrusion piece 653 in the input shaft member 65 is formed to be curved along the outer peripheral surface of the cylindrical shaft 624 of the output shaft member 62 within a predetermined angle range with respect to the center of the through hole 651.

  Next, the output shaft member 62 is mounted on the cap 66 on which the spring case 64, the input shaft member 65, and the brake spring 63 are mounted. Here, the output shaft member 62 has a substantially cylindrical columnar shaft 624 partially formed with a fan-shaped projection 625 that protrudes rightward in the axial direction from the concave surface 628 on the right surface side of the circular flange 652. have. The protrusion 625 is formed so as to be curved and protrude along the outer peripheral surface of the cylindrical shaft 624 within a predetermined angle range with respect to the center of the cylindrical shaft 624. The projection 625 of the output shaft member 62 is located between the opposed end portions of the pair of projection pieces 653 in the input shaft member 65, and each end 631 of the brake spring 63 is a projection of the output shaft member 62. It is located between one end of 625 and one of the opposing ends of the pair of protruding pieces 653, and between the other end of the protruding portion 625 of the output shaft member 62 and the other of the opposing ends of the pair of protruding pieces 653, respectively. By placing the output shaft member 62 in this manner (see FIG. 5), the brake function of the stopper device 6 is realized as described later.

  And the front-end | tip (left end) of a pair of projection piece 653 in the input shaft member 65 is arrange | positioned at the concave surface 628 on the right surface side of the flange 623 of the output shaft member 62 so that rotation may be supported, The peripheral surface of 624 is rotatably supported by the inner peripheral surface on the shaft side of the pair of protruding pieces 653 in the input shaft member 65. For this reason, the output shaft member 62 is less likely to cause shaft blur with respect to the input shaft member 65. In addition, a square hole (in this example, a square hole) 622 is provided on the central axis of the output shaft member 62 so as to engage the drive shaft 11 so as not to be relatively rotatable.

  Next, the cylindrical portion 662 of the cap 66 is covered with the case housing 61. The case housing 61 has a substantially cylindrical outer shape in which the right end surface side is completely opened, and the output shaft member 62, the brake spring 63, the spring case 64, and the input shaft member 65 are placed on the cap 66. The cap 66 is covered by rotation while covering the outer peripheral surface of the cylindrical portion 662 with almost no gap. Because of this rotational fitting, there are four predetermined locations on the outer peripheral surface of the cylindrical portion 662 of the cap 66 (four in this example, point-symmetric from the axial center) at predetermined locations on the inner peripheral wall of the case housing 61 (four locations in this example). Corresponding to the claw portion 666 formed at the location), a guide groove 615 is formed to guide the axial engagement and guide it to rotational fitting. And the fitting hole 612 for making each nail | claw part 666 fit by the said rotational fitting is formed in the predetermined location (4 places in this example) of the surrounding wall of the case housing 61, respectively. In this example, the fitting hole 612 that penetrates the peripheral wall is used. However, the fitting recess may be a recess formed in the inner peripheral wall of the peripheral wall. Therefore, the fitting part may be either the fitting hole 612 or the fitting recess. It can be.

  The inner diameter of the peripheral wall that covers the cylindrical portion 662 of the cap 66 by the case housing 61 is slightly larger than the outer diameter of the cylindrical portion 662 of the cap 66, but is configured to have an inner diameter that can be regarded as substantially the same diameter, and is in close contact with no gap. Since the case housing 61 and the cap 66 are elastically deformed and covered by rotation while being covered, the case housing 61 and the cap 66 are not easily deformed due to temperature and humidity changes. It is difficult to occur, and as a result, the fitting force is increased and a dustproof action is produced.

  An annular inner peripheral step 616 is provided at the left end of the inner peripheral wall of the case housing 61, and the inner peripheral step 616 of the case housing 61 is rotated at a position where the tip of the cylindrical portion 662 of the cap 66 contacts. It can be fitted and facilitates assembly while preventing gaps.

  Further, the peripheral edge of the flange 623 of the output shaft member 62 is rotatably supported by the inner peripheral wall of the inner peripheral step 616 of the case housing 61 and the inner peripheral wall of the spring case 64, and on the left end surface side of the case housing 61 A bearing portion 611 is formed in a circular opening, and the output shaft portion 621 of the output shaft member 62 is rotatably supported by the bearing portion 611 so as to be exposed. A rectangular hole (square hole in this example) 622 is formed through the output shaft portion 621 of the output shaft member 62, and engages the drive shaft 11 so as not to be relatively rotatable. For this reason, the case housing 61 prevents the axial blurring of the output shaft member 62 against the axial or vertical operating force or inertial force related to the brake operation, and as a result, the operability is improved. Can be improved.

  Further, the left surface of the circular flange 623 of the output shaft member 62 receives the flat right surface inside the inner peripheral step 616 of the case housing 61 so as to contact and receive the periphery of the output shaft portion 621 of the output shaft member 62. And an annular inner circumferential step 627 having a diameter slightly smaller than the inner diameter of the inner circumferential step 616 of the case housing 61 are formed at substantially the same height. . By forming these annular inner circumferential steps 626 and 627, the axial vibration of the output shaft member 62 is suppressed, and the contact friction is reduced as compared with the case where the surfaces are simply contacted with each other. The receiving accuracy can be easily improved.

  Then, referring to FIG. 5, the protruding portion 625 of the output shaft member 62 is positioned between the opposed end portions of the pair of protruding pieces 653 in the input shaft member 65, and each end portion 631 of the brake spring 63 is output. Between one end of the projecting portion 625 of the shaft member 62 and one of the opposed end portions of the pair of projecting pieces 653, and the other end of the projecting portion 625 of the output shaft member 62 and the other of the opposed end portions of the pair of projecting pieces 653 The output shaft member 62 is placed so as to be positioned between the two. The brake spring 63 is placed so as to generate a biasing force that always presses against the inner surface of the spring case 64 (that is, it is placed so as to always generate a frictional force). A rectangular hole (square hole in this example) 622 is formed through the output shaft portion 621 of the output shaft member 62, and engages the drive shaft 11 so as not to be relatively rotatable.

  For this reason, when the stopper device 6 is not operated (when the rotation of the input shaft member 65 is not input), the stopper shaft 6 has a rectangular hole 622 that is connected to the drive shaft 11 so that the drive shaft 11 is not rotated. Even if the projecting portion 625 of the output shaft member 62 has an attempt to rotate in the direction A or A ′ shown in the figure, it works in the direction of increasing the diameter of the brake spring 63 by abutting against one end portion 631 of the brake spring 63. Further, since the urging force that presses against the inner surface of the spring case 64 becomes stronger and a higher frictional force is generated, a braking force is generated against the rotation of the drive shaft 11 to prevent the slat 4 from dropping its own weight. Let On the other hand, when the output shaft 31 of the gear box 20 rotates with the rotation of the pulley by the operation of the operation code 3 as shown in FIG. Since the pair of projecting pieces 653 of the shaft member 65 rotate in the direction B or B ′ in the drawing and abut against one end 631 of the brake spring 63 and work in a direction to reduce the diameter of the brake spring 63, a spring case Since the urging force that presses against the inner surface of 64 is weakened and a lower frictional force is generated, the braking force can be relaxed and the rotation of the output shaft 31 of the gear box 20 can be transmitted to the drive 11. it can.

  That is, when the input shaft member 65 receives shaft rotation based on the opening / closing operation of the slat 4 (rotation of the output shaft 31 of the gear box 20), the output shaft member 62 rotates integrally with a predetermined play. Thus, the rotation of the input shaft member 65 is transmitted and rotated, and the slat 4 can be opened and closed because the input shaft member 65 is connected to the drive shaft 11 so as not to be relatively rotatable. However, when the rotation of the input shaft member 65 is transmitted to the output shaft member 62, when there is no need to relieve the braking force, the clearance may be set so as to sandwich the end portion 631 of the brake spring 63 to eliminate play. .

  As described above, the stopper device 6 according to the embodiment of the present invention accommodates the output shaft member 62, the brake spring 63, the spring case 64, and the input shaft member 65 by the rotational fitting of the case housing 61 and the cap 66. It is like that.

(Rotation fitting structure related to casing)
Here, the structure of the rotation fitting of the case housing 61 and the cap 66 and the operation thereof will be described in detail. 6A is a perspective view of the case housing 61 and the cap 66 in the stopper device 6 according to the embodiment of the present invention, FIG. 6B is a cross-sectional view of the case housing 61, and FIG. 6 is a left side view of the cap 66. FIG. FIG. 7 is an explanatory view of the rotational fitting of the case housing 61 and the cap 66.

  First, as described above, FIG. 6 shows the case housing 61 and the cap 66 that can be rotationally fitted to each other. For the rotational fitting, a predetermined portion (4 in this example) of the inner peripheral wall of the case housing 61 is shown. In the axial direction corresponding to the claw portions 666 formed at predetermined locations on the outer peripheral surface of the cylindrical portion 662 of the cap 66 (in this example, four locations symmetrical with respect to the axis). A guide groove 615 is formed for guiding and guiding to rotational fitting. And the fitting hole 612 for making each nail | claw part 666 fit by the said rotational fitting is formed in the predetermined location (4 places in this example) of the surrounding wall of the case housing 61, respectively. In particular, in order to guide only in the rotation direction of the rotation fitting, the guide groove 615 is formed with an inclined taper portion 615a that leads to the rotation fitting, and the claw portion 666 is also moved to the rotation fitting. Inclined taper portion 666a is formed.

  The inner diameter of the peripheral wall that covers the cylindrical portion 662 of the cap 66 by the case housing 61 is slightly larger than the outer diameter of the cylindrical portion 662 of the cap 66, but is configured to have an inner diameter that can be regarded as substantially the same diameter, and rotates while covering with almost no gap. Since the cover is configured to be fitted by fitting, the case housing 61 and the cap 66 are not easily deformed due to changes in temperature and humidity, and even if the shape is deformed, a gap is hardly formed, resulting in an increased fitting force and a dust-proof effect. It is something to be made.

  On the other hand, since the lid attachment by the rotation fitting of the case housing 61 and the cap 66 has extremely high sealing performance, in order to facilitate the assembling by the rotation fitting, as shown in FIG. It is preferable to use an assembly jig J for assisting rotation fitting. The assembling jig J may be any shape that can be gripped and easily applied with force, and has an octagonal plate shape in the illustrated example. On the surface of the assembly jig J, convex portions j1 disposed symmetrically with respect to the center are disposed at predetermined locations (four locations in this example). An engagement recess 614 that engages with each of the protrusions j <b> 1 is formed on the left surface of the case housing 61 (the left surface peripheral end in this example).

  Accordingly, when the case housing 61 and the cap 66 are assembled by rotational fitting, as shown in FIG. 7, the output shaft member 62, the brake spring 63, the spring case 64, and the input shaft member 65 are mounted on the mounted cap 66. First, each claw portion 666 of the cap 66 is engaged and inserted into each guide groove 615 of the case housing 61. Subsequently, by using the assembly jig J, each projection j1 of the assembly jig J is engaged with each engagement recess 614 of the case housing 61, and as shown by the white arrow in FIG. The cap 66 is pressed and rotated until the claw portions 666 of the cap 66 are positioned in the fitting holes 612 of the case housing 61. As described above, the case housing 61 and the cap 66 having high hermeticity can be easily assembled by rotational fitting. In particular, in order to guide only in the rotation direction of the rotation fitting, the guide groove 615 is formed with a tapered portion 615a, and the claw portion 666 is also formed with a tapered portion 666a. It has been made easier. On the other hand, since the guide groove 615 and the claw portion 666 are not formed with a tapered portion so as not to be guided in the reverse rotation direction of the rotation fitting, the case housing 61 and the cap 66 are once combined by the rotation fitting. Thus, the stopper device 6 according to an embodiment of the present invention realizes a highly airtight casing.

  Note that the casing of the case housing and the cap in the conventional technique is performed by a push-fitting in which the case housing and the cap are pushed in and fitted in the axial direction, or a push-fitting in which the case housing is pushed and fitted in the vertical direction. ing.

  For example, in Comparative Example 1 shown in FIG. 8A, a push-fit that pushes the case housing 110 in the axial direction and fits into the fitting hole 102 with respect to the claw portion 111 of the cap 110 that houses the brake unit 120 is performed. Illustrated. Since the case housing 100 and the cap 120 may be deformed due to changes in temperature and humidity, the fitting force is weakened. As a result, the fitting may be disengaged, or a gap may be generated and the brake operation may be caused by dust or dirt. It may get worse. Further, in the configuration implemented in Comparative Example 1 shown in FIG. 8A, the output shaft 121 of the brake unit 120 is substantially rotatably supported only by the bearing 101 in the case housing 110 (not shown). However, the input shaft portion of the brake unit 120 is also substantially rotated and supported only by the bearing portion), and the brake connected to the drive shaft 11 with respect to the operating force or inertial force in the axial direction and the vertical direction related to the brake operation. Shaking of the output shaft portion of the unit 120 may occur, and the operability accompanying rotation of the input shaft portion of the brake unit 120 connected to the output shaft 31 of the gear box 20 may deteriorate.

  Further, in Comparative Example 2 shown in FIG. 8B, a pair of engaging pieces 133 that can be elastically deformed by pushing the case housing 130 in the axial vertical direction with respect to the claw portions 142 of the cap 140 that accommodates the brake unit 120. The push-fit to be fitted into the respective fitting holes 134 is illustrated. The structure of the case housing 130 and the cap 140 may be deformed due to changes in temperature and humidity, so that the fitting force is weakened. As a result, the fitting may be disengaged or a gap may be generated and the brake operation may be caused by dust or dirt. It may get worse. 8B, the output shaft 121 of the brake unit 120 is substantially rotatably supported only by the bearing 141 of the cap 140 and the bearing 131 of the case housing 130. In the configuration shown in FIG. Therefore, although not shown, the input shaft portion of the brake unit 120 is also substantially rotationally supported only by the bearing portion, the axial force related to the brake operation and the operating force or inertia force in the vertical direction thereof. Shaking of the output shaft portion of the brake unit 120 connected to the drive shaft 11 may occur, and the operability accompanying rotation of the input shaft portion of the brake unit 120 connected to the output shaft 31 of the gear box 20 may deteriorate.

  On the other hand, as described above, the stopper device 6 according to the embodiment of the present invention realizes a casing with extremely high sealing performance by rotational fitting. The stopper device 6 according to one embodiment of the present invention includes an output shaft member 62, a brake spring 63, a spring case 64, and an input shaft member 65 that constitute a brake unit. Not only the output shaft portion 621 and the input shaft portion 655 are rotationally supported, but also the entire output shaft portion 621 and the input shaft portion 655 are rotationally supported with respect to the case housing 61 and the cap 66 (and also the spring case 64). In addition, since it is combined so as to be resistant to vibration in the axial direction, the performance is remarkably improved from the viewpoint of operability or stability of the shaft center related to brake operation. Furthermore, after achieving these performance improvements, in addition to the ease of assembling the output shaft member 62, the brake spring 63, the spring case 64, and the input shaft member 65, as shown in FIG. The assemblability of the casing using this is improved.

  Furthermore, as described with reference to FIG. 2, in the stopper device 6 according to the embodiment of the present invention, the assembly avoiding portions are also provided at positions corresponding to the claw portions 668 on the outer peripheral surface of the case housing 61. 613 is formed. This is because when the pair of claw portions 668 of the cap 66 are engaged with the pair of claw portions 22 in the gear box 20, the connection portion 656 of the input shaft portion 655 and the output shaft 31 of the gear box 20 are connected. It is necessary to adjust the engagement, so that the adjustable range is expanded to improve the assemblability (preventing the adjustable range from being restricted), or the claw portion 22 collides with the outer peripheral surface of the case housing 61. It can be prevented from being damaged.

(Axle shake prevention structure)
With reference to FIG. 9, the shaft shake preventing structure in the stopper device 6 of one embodiment according to the present invention will be described in more detail. FIGS. 9A and 9B are a left side view and a cross-sectional view taken along line AA ′ in the stopper device according to the embodiment of the present invention, respectively.

  The stopper device 6 according to an embodiment of the present invention includes an output shaft member 62, a brake spring 63, a spring case 64, and an input shaft member 65 that constitute a brake unit. The output shaft portion 621 and the input shaft portion 655 are not only rotationally supported, but the entire output shaft portion 621 and the input shaft portion 655 are rotationally supported with respect to the case housing 61 and the cap 66 (and the spring case 64). In addition, they are combined so as to be resistant to axial vibration. For this reason, the performance is remarkably improved in terms of operability or stability of the shaft center related to the brake operation.

  More specifically, as can be understood from FIG. 9, the cap 66 rotatably supports the input shaft portion 655 of the input shaft member 65 on the bearing portion 661, and the annular inner peripheral step 664 of the cap 66. , 665 abuts and receives the flat right surface of the flange 652 of the input shaft member 65 so that the contact friction is reduced and the receiving accuracy is further improved. The peripheral edge of the flange 652 of the input shaft member 65 is rotatably supported with respect to the inner peripheral wall of the spring case 64 and the inner peripheral wall of the cylindrical portion 662 of the cap 66. For this reason, the cap 66 prevents shaft blurring of the input shaft member 65 with respect to the axial or vertical operating force or inertia force related to the brake operation.

  Further, the output shaft member 62 and the input shaft member 65 are combined so as not to cause shaft shake. The case housing 61 rotatably supports the output shaft portion 621 of the output shaft member 62 on the bearing portion 611, and the annular inner circumferential steps 626 and 627 of the output shaft portion 621 of the output shaft member 62 are provided in the case housing. The contact friction is reduced and the receiving accuracy is improved as compared with the case where the flat right surface inside the inner peripheral step 616 of the 61 is abutted and received by simple abutment between the surfaces. The peripheral edge of the flange 623 of the output shaft member 62 is rotatably supported by the inner peripheral wall of the spring case 64 and the inner peripheral wall of the inner peripheral step 616 of the case housing 61. For this reason, the case housing 61 prevents shaft blurring of the output shaft member 62 with respect to the axial or vertical operating force or inertia force related to the brake operation.

  In addition, as described above, in the stopper device 6 according to the embodiment of the present invention, the assembly avoiding portion 613 is formed on the outer peripheral surface of the case housing 61 at a position corresponding to each claw portion 668. 9 expands the adjustable range related to the coupling engagement with the output shaft 31 of the gear box 20 and improves the assemblability. In addition to this, as shown in FIG. The shaft connecting portion of the connecting portion 656 formed in a fork-like shape formed at the right end portion of 655 is configured to have a rounded corner portion 656a having a rounded shape. This also has the effect of avoiding breakage of each part related to the coupling engagement and expanding the adjustable range to improve the assemblability.

  As a modification of the stopper device 6 of the present embodiment, a one-way clutch 67 that transmits only rotation in one direction of the input shaft member 65 to the output shaft member 62 may be provided as shown by a broken line in FIG. Good. For example, in the example of the horizontal blind illustrated in FIG. 1, the one-way clutch 67 allows rotation transmission from the input shaft member 65 to the output shaft member 62 only by rotation of the slat 4 in the pulling direction, and in the pulling direction of the slat 4. On the other hand, the rotation from the output shaft member 62 to the input shaft member 65 is made non-transmission so that the rotational force due to the weight of the slat 4 and the bottom rail 8 acts on the drive shaft 11 by a slight clutch operation on the input shaft member 65. Configure to idle.

(Comparative example)
By the way, in the conventional technique disclosed in Patent Document 1, the case of the stopper device for accommodating the input shaft member, the brake spring, and the output shaft member is constituted by two members, a case housing and a cap, and the case. The casing is formed by a push-fitting in which the housing and the cap are pushed and fitted in the axial direction (or the vertical direction of the axis).

  FIGS. 10A and 10B are a right side view and a B-B ′ sectional view of a stopper device of a comparative example based on the conventional technique disclosed in Patent Document 1, respectively. The stopper device of the comparative example shown in FIG. 10A has, as a schematic configuration, a casing that houses the input shaft member 265, the clutch spring 263 wound around the break drum 264, the one-way clutch 267, and the output shaft member 262, A case housing 261 and a cap 266 are included. A circular through hole 265a is provided on the central axis of the input shaft member 265 so that the drive shaft 11 can be disengaged. Further, the output shaft member 262 is formed with a square hole (in this example, a square hole) 262a that engages the drive shaft 11 so as not to be relatively rotatable.

  The one-way clutch 267 is housed in a brake drum 264 that functions as an outer sleeve, and rotatably supports the output shaft portion of the output shaft member 262 in which the bearing portion 261 of the case housing 261 and the rectangular hole 262a that contacts the bearing portion 261 are formed. A ring-shaped inner shaft 267a and a retainer 267b that is formed on a part of the brake drum 264 and rotates around the inner shaft 267a.

  The retainers 267b are provided at various locations (six locations in the present example) of the brake drum 264. Each of the retainers 267b has a receiving groove (not shown) that holds one needle 267c, and each needle 267c in the same circumferential direction of the inner shaft 267a. A recess (not shown) is provided to accommodate the S-shaped spring 267d that presses toward it. When the needle 267c moves in the pressing direction, the needle 267c is sandwiched between the inner shaft 267a and the brake drum 264 that functions as an outer sleeve.

  With such a configuration, the brake drum 264 can be rotated in one direction with respect to the inner shaft 267a in a fixed state in the one-way clutch 267, and the rotation is prevented in the reverse direction.

  A clutch spring 263 formed of a torsion coil spring is wound around the outer peripheral surface of the brake drum 264. A protruding piece 265e of the input shaft member 265 is located between both ends of the clutch spring 263, and the protruding piece 265e is curved along the outer peripheral surface of the brake drum 264 within a predetermined angle range with respect to the center of the inner shaft 267a. The clutch spring 263 is in contact with either one of both end portions of the clutch spring 263 to expand the diameter of the clutch spring 263.

  When the input shaft member 265 is rotated in one direction (operating in the slat lowering direction), the friction between the clutch spring 263 and the outer peripheral surface of the brake drum 264 is reduced, and the brake drum 264 is moved by the operation of the one-way clutch 267. Rotation is blocked. Then, the clutch spring 263 rotates with the protruding piece 265e while sliding on the outer peripheral surface of the brake drum 264.

  Further, when the input shaft member 265 is rotated in the other direction (when operated in the slat pulling direction), friction between the clutch spring 263 and the outer peripheral surface of the brake drum 264 decreases, but the brake drum 264 operates as the one-way clutch 267. Is allowed to rotate. Then, the clutch spring 263 and the brake drum 264 rotate together with the protruding piece 265e.

  When the protruding piece 262c formed on the output shaft member 262 contacts either one of both end portions of the clutch spring 263, the clutch spring 263 is reduced in diameter so that the frictional force of the brake drum 264 increases. .

  Since the structure and operation of such a stopper device with a one-way clutch function are the same as in Patent Document 1, further details are omitted.

  Incidentally, in the stopper device of the comparative example based on the conventional technique disclosed in Patent Document 1 shown in FIG. 10, the input shaft member 265, the clutch spring 263 wound around the break drum 264, and the one-way clutch 267 function as the case housing 261. The output shaft member 262 to be accommodated is accommodated, and the casing is formed by a push-fitting that is pushed in the axial direction by an annular cap 266 to be fitted.

  As shown in FIG. 10, the stopper device of the comparative example is provided with a pair of claw portions 261 a and a pair of through holes 261 b with respect to the case housing 261, so 2 and the output shaft 31 of the gear box 20 shown in FIG. 2 are adjusted so as to be relatively non-rotatably connected to each other, and the pair of claw portions 261a are connected to the pair of claw portions in the gear box 20. 22 is engaged with each other, and then the mounting screw 40 is screwed into the screw hole 21 via a pair of through holes 261b, thereby fixing the gear box 20 to the left end surface. However, in the stopper device of the comparative example shown in FIG. 10A, in order to improve its assembling property, it is assembled at a position corresponding to each through hole 261b in a shape that avoids the mounting screw 40 (in this example, a flat shape). Although the avoidance part 261c is formed, the assembling avoidance part for the pair of claws 261a is not formed. For this reason, the adjustable range related to the adjustment of the coupling engagement between the coupling portion 265c of the input shaft portion 265b and the output shaft 31 of the gear box 20 is limited, and in some cases, the claw portion 22 is connected to the case housing 261. It may collide with the outer peripheral surface and be damaged.

  Further, the annular cap 266 in the stopper device of the comparative example only supports the peripheral edge 265 of the flange of the input shaft member 265 so as to be rotatable at the inner peripheral edge, and is point-symmetrically outward at four positions on the outer peripheral edge. It has a projecting convex portion 266a and an annular locking piece 266b extending leftward in the axial direction. Then, the convex portion 266a is engaged with the concave portion 261d formed correspondingly in the case housing 261, and the locking piece 266b is engaged with the protruding portion 261e protruding correspondingly formed in the case housing 261. As a result, the casing is formed by a push-fitting in which the annular cap 266 is pushed and fitted into the case housing 261 in the axial direction. In this push-fitting, the output shaft member 262 and the input shaft member are pressed by surface contact with the cap 266.

  For this reason, in the stopper device of the comparative example, the output shaft member 262 is partially formed with a flange 262 and the periphery of the flange 262 is rotatably supported by the inner wall of the case housing 261. A problem remains in the fitting force, and further, shaft blurring of the input shaft member 265 and the output shaft member 262 combined with the input shaft member 265 is likely to occur.

  On the other hand, the stopper device 6 according to the present invention shown in FIG. 9 has a sealing property that improves the environmental resistance and dust resistance of the casing, as well as the operating force or inertia in the axial direction and the vertical direction related to the brake operation. Further performance improvement can be achieved from the viewpoint of resistance to force, that is, operability or stability of the shaft center related to brake operation, and assembly performance can be improved after achieving these performance improvements. For this reason, the stopper device 6 according to the present invention is excellent in practicality.

  The present invention has been described above with reference to specific embodiments. However, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the technical concept thereof. For example, in the above-described embodiment, the example in which the stopper device 6 is mainly provided for the horizontal blind has been mainly described, but the present invention can also be applied to a vertical blind, a roll blind (roll screen), a pleated screen, and the like.

  Moreover, although the suitable example which assemble | attaches the stopper apparatus 6 to the gear box 20 was demonstrated, the stopper apparatus 6 can also be applied so that it may support with the head box 1 without assemble | attaching to another apparatus.

  Further, in the example of the embodiment described above, an example in which the housing 66 is provided with the pair of claw portions 668 and the pair of through holes 667 in the cap 66 has been described. The shape may be provided in Furthermore, in the example of the embodiment described above, an example in which the assembly avoiding portions 613 are formed in the case housing 61 at positions corresponding to the respective housing connection portions of the cap 66 has been described. It is good also as a shape in which the avoidance part 613 was formed.

  According to the present invention, since the blind stopper device can be configured in an aspect that is excellent in practicality, it is useful for blind applications.

DESCRIPTION OF SYMBOLS 1 Headbox 4 Slat 5 Cord support device 6 Stopper device 8 Bottom rail 9 Ladder cord 10 Lifting cord 11 Drive shaft 61 Case housing 62 Output shaft member 63 Brake spring 64 Spring case 65 Input shaft member 66 Cap 67 One-way clutch

Claims (10)

A blind stopper device that opens and closes a shielding material by rotating a drive shaft,
An input shaft member for inputting shaft rotation based on the opening / closing operation of the shielding material;
An output shaft member connected to the drive shaft so as not to rotate relative to the drive shaft;
Braking means for applying a braking force to the rotation of the output shaft member;
A case housing and a cap for housing the input shaft member, the output shaft member, and the braking means;
A blind stopper device, wherein the case housing and the cap are covered with each other by rotational fitting. The cap has a cylindrical portion for accommodating the input shaft member, the output shaft member, and the braking means, and a claw portion is formed at a predetermined location on the outer peripheral surface of the cylindrical portion,
The case housing has a peripheral wall that closely covers the cylindrical portion, and a guide groove that guides to the rotation fitting corresponding to the claw portion on the peripheral wall, and the claw portion is fitted by the rotation fitting. 2. The blind stopper device according to claim 1, wherein fitting portions for joining are formed respectively. 3.   The blind stopper device according to claim 2, wherein the guide groove and the claw portion have an inclined tapered portion that guides to the rotational fitting.   4. The brake device according to claim 1, wherein the brake means includes a brake spring that applies a braking force by pressing in the diameter-expanding direction against the cap itself or a spring case to which the cap is fixed. The blind stopper device according to one item.   The input shaft member has an input shaft portion for inputting shaft rotation based on an opening / closing operation of the shielding material, and an input side flange connected to the input shaft portion, and at least the input shaft portion and the input side flange are the caps The blind stopper device according to any one of claims 1 to 4, wherein the blind stopper device is rotatably supported on the blind.   The output shaft member includes an output shaft portion connected to the drive shaft so as not to rotate relative to the drive shaft, and an output-side flange connected to the output shaft portion. At least the output shaft portion and the output-side flange are connected to the case housing and the case housing. The blind stopper device according to any one of claims 1 to 5, wherein the blind stopper device is rotatably supported by one or both of the caps.   The input shaft member has a double crotch-like connecting portion for connecting to an operation-side shaft based on the opening / closing operation of the shielding material, and the shaft connecting portion in the connecting portion has a rounded corner portion having a rounded shape. The blind stopper device according to claim 1, wherein the blind stopper device is provided. Either one of the case housing and the cap has a plurality of housing connection parts for assembling to the device that performs the opening / closing operation of the shielding material,
The blind stopper according to any one of claims 1 to 7, wherein any one of the case housing and the cap has an assembly avoidance portion with respect to all of the housing connecting portions. apparatus. The case housing has an engagement concave portion that engages with a convex portion of an assembly jig for assisting the rotational fitting and that engages with a convex portion of the assembly jig used during assembly on the outer shape of the housing. The blind stopper device according to any one of claims 1 to 8, characterized in that it is characterized in that:   The blind stopper device according to any one of claims 1 to 9, further comprising a one-way clutch that transmits only rotation in one direction of the input shaft member to the output shaft member.