WO2017094685A1 - クラッチ装置及び遮蔽装置 - Google Patents
クラッチ装置及び遮蔽装置 Download PDFInfo
- Publication number
- WO2017094685A1 WO2017094685A1 PCT/JP2016/085240 JP2016085240W WO2017094685A1 WO 2017094685 A1 WO2017094685 A1 WO 2017094685A1 JP 2016085240 W JP2016085240 W JP 2016085240W WO 2017094685 A1 WO2017094685 A1 WO 2017094685A1
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- WIPO (PCT)
- Prior art keywords
- clutch
- groove
- guide groove
- clutch device
- drum
- Prior art date
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Classifications
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
- E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
- E06B9/40—Roller blinds
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
- E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
- E06B9/80—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling
- E06B9/82—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic
- E06B9/90—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic for immobilising the closure member in various chosen positions
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
- E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
- E06B9/80—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D41/00—Freewheels or freewheel clutches
- F16D41/06—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface
- F16D41/08—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface with provision for altering the freewheeling action
Definitions
- the present invention relates to a clutch device that selectively switches between restriction and allowance of relative rotation of a clutch drum and a clutch case, and a shielding device that includes this clutch device.
- a roll screen which is a type of shielding device, pulls the bottom rail or the like downward to rewind the screen to a desired height, and when the screen is released in this state, the rotation restricting action of the clutch device provided in the winding pipe causes Some screens are configured to be held at a desired height. In such a roll screen, when the screen is slightly lowered from the above-described rotation restriction state, the restriction action is released, and the screen is wound around the winding pipe by the urging force of the coil spring disposed in the winding pipe. It is like that.
- a guide is provided between a clutch drum (brake drum) supported in a non-rotatable manner and a clutch case (clutch cap) fixed to a winding pipe (winding shaft).
- a groove is formed, and the clutch ball (sliding body) relatively moves in the guide groove as the winding pipe rotates. Then, the clutch ball is locked by a locking portion (stop groove) provided in the guide groove, and the clutch drum and the clutch case are unable to rotate relative to each other, so that the rotation is restricted.
- the present invention has been made in view of such circumstances, and a clutch device capable of reducing the return angle until the relative rotation is restricted when the relative rotation of the clutch drum and the clutch case is restricted. It is to provide.
- the guide groove includes an endless guide groove and a plurality of movable bodies that are relatively movable along the guide groove, and the guide groove includes at least one locking portion that locks the movable body.
- a clutch device configured to be locked to the locking portion at different timings by providing at least one of the following configurations (1) and (2): Is done.
- a plurality of the moving bodies are arranged on one guide groove.
- a plurality of the guide grooves are provided, and each guide groove has at least one moving body.
- the clutch device of the present invention a plurality of moving bodies are provided, and at least two of the moving bodies are locked to the locking portions at different timings, so that the moving body is locked to the locking portions frequently.
- the relative rotation of the clutch drum and the clutch case is restricted, the average return angle until the relative rotation is restricted becomes small.
- the clutch device includes at least one clutch drum and a clutch case disposed on an outer periphery of the clutch drum, and selectively switches between restriction and allowance of relative rotation in one direction of the clutch drum and the clutch case.
- the guide groove is provided in a circumferential direction on either the outer surface of the clutch drum or the inner surface of the clutch case, and the movable body is a relative member between the clutch drum and the clutch case. With relative rotation, the relative movement is performed along the guide groove, and the movable body is locked by the locking portion, thereby restricting relative rotation in one direction between the clutch drum and the clutch case.
- the guide groove includes a one-way circulation groove in which the movable body circulates when the clutch drum and the clutch case are relatively rotated in the one direction, and a relative rotation of the clutch drum and the clutch case in the other direction.
- at least one return groove that guides from the one-way circulation groove to the other-direction circulation groove.
- the guide groove is provided between the other-direction circulation groove and the one-direction circulation groove so as to be spaced apart from the locking portion in the circumferential direction, and the one-way relative of the clutch drum and the clutch case is relative to each other.
- At least one passage portion that guides the movable body to the one-way circulation groove without restricting rotation, and the clutch drum and the clutch case are disposed in the one-way circulation groove in a state where the movable body is in the other-direction circulation groove.
- a release groove for guiding the movable body from the locking portion or the passage portion to the one-way circulation groove is further provided.
- the guide groove includes a plurality of the locking portions and the passage portions, and one of the passage portions constitutes a part of the return groove.
- At least one moving body other than the one moving body is any one locking portion or any of the above moving portions. It is comprised so that it may exist in the position which becomes the same phase as one latching
- the locking portions or the passing portions are arranged at equal intervals, and the plurality of moving bodies are separated by an integral multiple of the interval.
- the guide groove is divided into a stop region where a plurality of locking portions are disposed and a passage region where a plurality of passage portions are disposed, and the return groove is the one direction in the passage region. Only one of the one-way circulation grooves is disposed at the position.
- the two moving bodies are arranged in the guide groove at an interval of about 180 °, approximately half the circumference of the guide groove is a stop area, and the other substantially half circumference of the guide groove is a passage area,
- the other moving body is in the same phase as any one locking portion or any one locking portion. Configured to be in
- the guide groove is provided on the outer peripheral surface of the clutch drum
- the movable body is disposed between the guide groove and a slide groove provided in an axial direction at at least two locations on the inner peripheral surface of the clutch case, and is moved in the slide groove as the clutch drum rotates. Is moved relatively in the guide groove.
- the guide groove is provided on at least one end surface of the clutch drum.
- the present invention includes the above-described clutch device, and includes a rotating body biased in one direction, and a shielding member that can be opened and closed in accordance with the rotation of the rotating body.
- a shielding device that relatively moves along the guide groove as the body rotates is provided.
- FIG. 2A is an enlarged cross-sectional view of a main part of the roll screen clutch device of FIG. 1
- FIG. 2B is a cross-sectional view taken along line AA of FIG.
- FIG. 4 is a development view of a guide groove of a clutch drum of the clutch device of FIG. 3. It is operation
- FIG. 3A and 3B show a modification in which the guide groove of the clutch device of FIG. 3 is provided on the clutch case side, wherein FIG. 3A is an enlarged cross-sectional view of a portion for use, and FIG. It is a figure which shows the shielding apparatus double roll screen which concerns on 2nd Embodiment of this invention, (a) is a front view, (b) is a side view, (c) is an expanded sectional view which shows the connection of a coil spring and a clutch apparatus. It is. It is an expanded view of the guide groove which concerns on 3rd Embodiment of this invention. It is an expanded view of the guide groove which concerns on 4th Embodiment of this invention.
- the curtain rail which is the shielding apparatus which concerns on 9th Embodiment of this invention is shown, (a) is a front view (a hanger rail is sectional drawing), (b) is a top view, (c) is a side view. (B) is an enlarged view of an urging pulley unit.
- FIG. 17 is an enlarged cross-sectional view of a part of the curtain rail clutch device of FIG. 16.
- A) is a perspective view which shows the clutch drum of the clutch apparatus of FIG. 17,
- (b) is an end elevation which shows the guide groove of the said clutch drum.
- the clutch apparatus which concerns on 10th Embodiment of this invention is shown, (a) is a principal part expanded sectional view, (b) is DD sectional drawing of (a).
- FIG. 20 is a development view of a guide groove of a clutch drum of the clutch device of FIG. 19.
- a coil spring 5 as an urging means is disposed in the winding pipe 3, a coil spring 5 as an urging means is disposed.
- One end of the coil spring 5 is fixed to the bracket 2a via the fixed shaft 5a, the other end is connected to the winding pipe 3, and the screen 4 is wound in a direction in which the screen 4 is wound.
- the winding pipe 3 is energized.
- the winding pipe 3 rotates in the opposite direction and the coil spring 5 is stored. It is like that.
- the direction in which each member rotates when the screen 4 is wound is the biasing direction (“one direction” in the claims), and the direction in which each member rotates when the screen 4 is rewound is stored.
- Direction (“other direction” in the claims).
- the roll screen of the present embodiment is provided with a clutch device 10 for restricting the rotation of the winding pipe 3 against the urging force of the coil spring 5 and for supporting the screen 4 by suspending it at a desired position. Yes.
- the clutch device 10 includes a cylindrical clutch drum 20 in which a base end portion 20 a is non-rotatably supported by a bracket 2 b (see FIG. 1), and the clutch drum 20.
- a cylindrical clutch case 30 disposed on the outer periphery and fixed to the take-up pipe 3 and two clutch balls 40a and 40b as moving bodies are mainly provided. These members are made of resin, for example.
- the clutch drum 20 is formed integrally with a base end portion 20a having a small diameter (the right side portion in FIG. 3A) and a main body portion 20b having a diameter larger than that of the base end portion 20a.
- the base end portion 20a has a square axis and is fitted and fixed to a bracket shaft (not shown) attached to the bracket 2b.
- the outer peripheral surface of the main-body part 20b has the endless guide groove 21 provided in the circumferential direction. The configuration of the guide groove 21 will be described later.
- the clutch case 30 is disposed on the outer peripheral surface of the clutch drum 20 so as to be rotatable relative to the outer peripheral surface of the clutch drum 20 as shown in FIGS. 3A and 3B, and is slightly smaller than the inner diameter of the winding pipe 3.
- the inner diameter of the take-up pipe 3 is rotated by being inserted into the take-up pipe 3 and fixed.
- Slide grooves 32a and 32b are formed.
- slide grooves 32a and 32b are provided at positions symmetrical with respect to the rotation axis, that is, at positions 180 degrees apart in the circumferential direction, and between the guide groove 21 of the clutch drum 20 and the slide grooves 32a and 32b of the clutch case 30.
- Clutch balls 40a and 40b as moving bodies are disposed between them.
- the two clutch balls 40a and 40b are slidable in the axial direction (left and right direction in FIG. 3A), respectively, and when the clutch case 30 rotates with the rotation of the winding pipe 3, the clutch The balls 40a and 40b move along the guide groove 21 while sliding in the slide grooves 32a and 32b. Due to such a configuration, the clutch ball 40a and the clutch ball 40b are always positioned 180 degrees apart on the guide groove 21 (see FIG. 4).
- the clutch drum 20 and the clutch case 30 as described above are configured such that the base end portion 20a of the clutch drum 20 is inserted into the clutch case 30 from the end portion 33 side of the clutch case 30, and between the base end portion 20a and the main body portion 20b. Are assembled by bringing the stepped portion 22 formed into a contact with the narrow diameter portion 31 of the clutch case 30. Then, by inserting the retaining ring 60 from the base end portion 20a side of the clutch drum 20 and fitting it into contact with the narrow diameter portion 31, the clutch drum 20 and the clutch case 30 are axially (in FIG. 3A). It does not move relative to the left or right direction.
- a governor device 61 is provided on the end 33 side of the clutch drum 20 to appropriately suppress the winding speed of the screen 4.
- the clutch drum 20 is also detached from the clutch case 30 by this governor device 61. To be suppressed.
- the clutch balls 40a and 40b move downward in the figure by being urged through the urged clutch case 30 (winding pipe 3).
- the downward direction in FIG. Further, when the screen 4 is rewound, the clutch balls 40a and 40b move downward and the urging force is accumulated in the coil spring 5, so the upward direction in the figure is the accumulation direction C.
- the upstream side and the downstream side in the biasing direction F in the guide groove 21 are simply referred to as the upstream side and the downstream side, respectively.
- a right urging direction circumferential groove 51a and a left urging direction circumferential groove 51b around which 40a and 40b circulate are formed in a circumferential annular shape.
- the six locking portions 52 are located between the energy accumulation direction circulation groove 50 and the right biasing direction circulation groove 51a, and the energy accumulation direction circulation groove. 50 and the left energizing direction circumferential groove 51b are alternately arranged to form a stop area A1, and in the other range of about 180 degrees, the passing portions 53 are similarly arranged alternately to define the passing area as A2. Forming.
- the locking part 52 in the stop area A1 is referred to as locking parts 52-1 to 52-6 in order from the downstream side, that is, in the biasing direction F, and similarly in the passage area A2.
- the passage part 53 is designated as 53-1 to 53-6 in order from the downstream side. Because of this arrangement, when one clutch ball 40a (40b) is in a position that is in the same phase as any passing portion 53-x or passing portion 53-x, the other clutch ball 40b (40a) ) Are in the same phase as the locking portion 52-x or the locking portion 52-x separated by 180 degrees.
- the position having the same phase means a position where the angle (height in the developed view) from the reference position of the guide groove 21 (for example, the lower end of the developed view in FIG. 4) is equal.
- the guide groove 21 includes a return groove 54 that guides the clutch balls 40a and 40b from the energizing direction circumferential groove 51 to the accumulating direction circumferential groove 50, and an engaging portion of the clutch balls 40a and 40b from the energizing direction circumferential groove 50. 52 or a guide groove 55 that guides the clutch balls 40a and 40b to the energizing direction circumferential grooves 51a and 51b.
- the return groove 54 includes a return groove 54a that guides from the right biasing direction circumferential groove 51a to the accumulating direction circumferential groove 50, and a return groove 54b that guides from the left biasing direction circumferential groove 51b to the storage direction circumferential groove 50.
- a return groove 54a is provided between the passage portion 53-1 and the passage portion 53-3
- a return groove 54b is provided between the passage portion 53-2 and the passage portion 53-4.
- the parts 53-1, 53-2 constitute part of the return grooves 54a, 54b, respectively.
- the return grooves 54a and 54b are formed when the clutch case 40 is rotated in the accumulating direction with respect to the clutch drum 20 in a state where the clutch balls 40a and 40b are in the energizing direction circumferential grooves 51a and 51b. 40b is guided to the accumulating direction circulation groove 50.
- a total of twelve guide grooves 55 are provided on the upstream side (position in the energy accumulation direction C) with respect to each locking portion 52 and each passage portion 53, and the clutch balls 40 a and 40 b accumulate energy.
- the clutch case 30 is rotated in the urging direction with respect to the clutch drum 20 in the state of being in the direction circumferential groove 50, the clutch balls 40a and 40b are guided to the locking portion 52 or the passage portion 53.
- One release groove 56 is provided on each upstream side (position in the accumulating direction C) with respect to each of the locking portions 52 and the passing portions 53-3 to 53-6 excluding the passing portions 53-1, 53-2.
- the clutch is required until the winding pipe 3 rotates about 50 degrees at the maximum.
- the ball 40a or the clutch ball 40b is guided to any one of the locking portions 52-1 to 52-6. Accordingly, the return angle until the rotation of the clutch case 30 is restricted after the screen 4 is released, and the amount of rewinding of the screen 4 until the rewinding of the screen 4 is stopped can be reduced. 4 can be easily suspended and supported at a desired position.
- the clutch ball 40a (40b) once passes through the release groove 56 to the energizing direction circulation grooves 51a and 51b. After being guided, the clutch ball 40 a (40 b) is again locked by the locking portion 52 even if the screen 4 is released again through the return groove 54 and then guided to the energy storing direction rotating groove 50.
- the clutch ball 40 a (40 b) is again locked by the locking portion 52 even if the screen 4 is released again through the return groove 54 and then guided to the energy storing direction rotating groove 50.
- only one return groove 54 is provided for one urging direction circumferential groove 51, the passage region A 2 without the locking portion 42 is provided in the guide groove 21, and the return groove 54 is provided.
- the allowable range ⁇ can be set larger than 180 degrees. Specifically, when the screen 4 is slightly rewound and the clutch balls 40a, 40b are guided to the energizing direction circumferential grooves 51a, 51b, as shown in FIG. 6, the clutch balls 40a (40b) on the stop area A1 side are shown.
- the other clutch ball 40b When one clutch ball 40a is positioned at the locking portion 52-1 or 52-2, the other clutch ball 40b is positioned at the passage portion 53-1 or 53-2, so that the clutch ball 40a is From the position (position P2) where the clutch ball 40b is moved as it is guided to the right energizing direction circumferential groove 51a or the left energizing direction circumferential groove 51b via the release groove 56, the clutch ball 40b is engaged with the engaging portion 52.
- the rotation restriction of the clutch device 10 can be released by guiding the clutch ball 40b to the range up to the position (position Q) immediately before being guided upstream of ⁇ 1 and releasing the screen 4 (FIG. 6). Left clutch balls 40a and 40b). Even in this case, it is possible to secure the rotation allowable range ⁇ min of about 170 degrees.
- the clutch ball 40a (40b) moves through the return groove 54 in the accumulating direction circumferential groove 50 in the accumulating direction C and is upstream of the locking portion 52-1 on the most downstream side of the stop region A1.
- the interval until it is guided to the side is large. Accordingly, the rotation allowable range ⁇ of the take-up pipe 3 when the screen 4 is rewound so that the screen 4 can be taken up from the state where the take-up of the screen 4 is restricted can be sufficiently secured.
- the winding operation of the screen 4 can be easily performed.
- the present invention can also be implemented in the following modes.
- the guide groove 21 is provided on the clutch drum 20 side and the slide grooves 32a and 32b are provided on the clutch case 30 side, but FIG. 7 (a) and FIG. 7 (b) As shown, the guide groove 34 may be provided on the inner surface of the clutch case 30, and the slide grooves 23 a and 23 b may be provided on the outer peripheral surface of the clutch drum 20. In this case, it is preferable that the shape of the guide groove 34 is configured so that the developed view is the same as that in the above embodiment, and the two clutch balls 40a and 40b are also arranged at an interval of 180 degrees as in the above embodiment. Even with such a configuration, it is possible to obtain an effect according to the above embodiment.
- the clutch balls 40a and 40b are used as the moving body.
- the shape of the moving body does not have to be a sphere, and moves along the guide groove 21 while sliding in the slide grooves 32a and 32b.
- Other shapes such as a cylindrical shape may be used as long as they can be slid.
- FIG. 8 shows a double roll screen which is a shielding device according to the second embodiment.
- clutch devices 10 substantially the same as those in the first embodiment described above are provided in the two winding pipes 3X and 3Y of the double roll screen, respectively.
- a known configuration as disclosed in International Publication No. 2013/005524 pamphlet is applied.
- the double roll screen of the present embodiment has brackets 2a and 2b attached to both sides of one frame 1, and two brackets 2a and 2b are provided with two The winding pipes 3X and 3Y are rotatably supported, and the screens 4X and 4Y are suspended and supported from the winding pipes 3X and 3Y, respectively. Further, coil springs 5X and 5Y as urging means are disposed in the winding pipes 3X and 3Y. One end of the coil spring 5X is fixed to the bracket 2b via the fixed shaft 5bX, and the other end is connected to the winding pipe 3X.
- one end of the coil spring 5Y is fixed to the bracket 2a via the fixed shaft 5aY, and the other end is connected to the winding pipe 3Y.
- the coil springs 5X and 5Y urge the winding pipes 3X and 4Y in a direction in which the screens 4X and 4Y are wound in a state where the screens 4X and 4Y are rewound.
- the rotation directions of the winding pipes 3X and 4Y when winding the screens 4X and 4Y are opposite to each other as shown in FIG.
- the clutch device 10X is provided on the opposite side of the fixed shaft 5bX from the bracket 2b, and the clutch device 10Y is provided on the opposite side of the fixed shaft 5aY from the bracket 2a.
- the clutch device 10X and the clutch device 10Y differ only in the direction of attachment to the fixed shafts 5bX and 5aY and have the same configuration. Therefore, in the following, referring to FIG.
- the device 10X and the attachment structure of the clutch device 10X and the coil spring 5X will be described.
- the clutch device 10X includes a clutch drum 20X and a clutch case 30X as in the first embodiment, and two clutch balls (not shown) are disposed between the clutch drum 20X and the clutch case 30X.
- a square shaft-like base end portion 20aX on the bracket 2b side of the clutch drum 20X is inserted into a distal end portion 8aX of a support cylinder 9X that is non-rotatably connected to the fixed shaft 5b, and is supported non-rotatably via the connection cylinder 9.
- the clutch case 30X is attached to a drive plug 11X that is fitted to the inner peripheral surface of the winding pipe 3X (see FIG. 8A) and rotates integrally with the winding pipe 3X.
- the rib 11aX provided at the end of the drive plug 11X on the bracket 2a side engages with the engagement protrusion 30aX provided on the bracket 2b side of the clutch case 30X and protruding outward in the circumferential direction. . Since the bracket 2aX side of the coil spring 5X is wound around the drive plug 11X, the urging force of the coil spring 5X is transmitted to the clutch case 30 and the take-up pipe 3X via the drive plug 11X. .
- the clutch devices 10X and 10Y having the same configuration are provided in the two take-up pipes 3X and 3Y, respectively, so that parts can be shared. Further, the clutch device 10 can be the same as that used for the roll screen used in the above embodiment.
- FIG. 9 is a development view of the guide groove 21 of the clutch device 10 according to the third embodiment.
- the clutch device 10 of the third embodiment is different from the first embodiment only in the configuration of the guide groove 21 and the circumferential interval (phase difference) between the slide grooves 32a and 32b and the two clutch balls 40a and 40b. Only this difference will be described.
- the guide groove 21 of the clutch device 10 of the present embodiment includes seven locking portions 52 and five passing portions 53, and includes four locking portions 52-1 to 52-4 and two passing portions 53. -1, 53-2, three locking portions 52-5 to 52-7, and three passage portions 53-4 and 53-5 are arranged alternately in this order on the left and right sides at equal intervals.
- the return groove 54a is provided between the passage portion 53-3 and the passage portion 53-5, and the return groove 54b is provided between the passage portion 53-1 and the locking portion 52-5.
- the slide grooves 32a and 32b and the two clutch balls 40a and 40b are provided at positions separated by 90 degrees in the circumferential direction (see FIG. 9).
- FIG. 10 is a development view of the guide groove 21 of the clutch device 10 according to the fourth embodiment.
- the clutch device 10 of the fourth embodiment is different from the first embodiment only in the configuration of the guide groove 21, and only the difference will be described below.
- the guide groove 21 of the clutch device 10 includes one energizing direction circumferential groove 50 and one energizing direction circumferential groove 51, three locking portions 52-1 to 52-3 and three passages.
- the parts 53-1 to 53-3 are arranged in this order at equal intervals (60 degree intervals, see FIG. 10).
- the return groove 54 is provided between the passage portion 53-1 and the passage portion 53-2, that is, on the downstream side in the passage region A2.
- the screen 4 when the screen 4 is unwound after being rewound to a predetermined position, the screen 4 is controlled while being kept under the condition that the winding of the screen 4 is reliably regulated. It is possible to reduce the return angle.
- the clutch ball 40a (40b, 40c) moves through the return groove 54 in the accumulating direction circumferential groove 50 in the accumulating direction C, and is guided upstream from the locking portion 52-1. The interval until it is increased. Accordingly, it is possible to ensure a large rotation allowable range ⁇ of the winding pipe 3 when the screen 4 is rewound so that the screen 4 can be wound from a state where the winding of the screen 4 is restricted. ing.
- FIG. 11 is a development view of the guide groove 21 of the clutch device 10 according to the fifth embodiment.
- the clutch device 10 of the fifth embodiment is different from the first embodiment in the configuration of the guide groove 21 and the number of clutch balls 40, and only the difference will be described below.
- the four locking portions 52-1 to 52-4 and the eight passage portions 53-1 to 53-8 are alternately arranged in this order on the left and right sides at equal intervals.
- the range of 120 degrees out of the entire circumference of the guide groove 21 is the stop area A1
- the other range of 240 degrees is the passage area A2.
- the return groove 54a is provided between the passage portion 53-1 and the passage portion 53-3
- the return groove 54b is provided between the passage portion 53-2 and the locking portion 52-4.
- Three clutch balls 40a, 40b, and 40c are provided at positions spaced 120 degrees (see FIG. 11) at equal intervals.
- the screen 4 when the screen 4 is unwound after being rewound to a predetermined position, the screen 4 is controlled while being kept under the condition that the winding of the screen 4 is reliably regulated. It is possible to reduce the return angle.
- the clutch ball 40a (40b, 40c) stores the accumulating direction circulation groove 50 via the return groove 54a or 54b.
- the distance from moving in the direction C to being guided upstream from the locking portion 52-1 is further increased. Accordingly, the rotation allowable range ⁇ of the take-up pipe 3 when the screen 4 is rewound so that the screen 4 can be taken up from the state where the take-up of the screen 4 is restricted is larger than that in the first embodiment. It is possible to secure.
- FIG. 12 is a development view of the guide groove 21 of the clutch device 10 according to the sixth embodiment.
- the clutch device 10 of the sixth embodiment is different from the first embodiment in the configuration of the guide groove 21 and the number of clutch balls 40, and only this difference will be described below.
- the three locking portions 52-1 to 52-3 and the nine passage portions 53-1 to 53-9 are arranged alternately in the left and right order at equal intervals.
- the 90 ° range of the entire circumference of the guide groove 21 is the stop region A1
- the other 270 ° range is the passage region A2.
- the return groove 54a is provided between the passage portion 53-1 and the passage portion 53-3
- the return groove 54b is provided between the passage portion 53-2 and the locking portion 52-4.
- Four clutch balls 40a, 40b, 40c, and 40d are provided at positions that are 90 degrees apart at equal intervals.
- the screen 4 when the screen 4 is unwound after being rewound to a predetermined position, the screen 4 is controlled while being kept under the condition that the winding of the screen 4 is reliably regulated. It is possible to reduce the return angle.
- the clutch ball 40a (40b, 40c, 40d) passes through the return groove 54 or 54b to define the accumulating direction circulation groove 50.
- the distance from the movement in the accumulating direction C to the guiding to the upstream side of the locking portion 52-1 is further increased. Therefore, the rotation allowable range ⁇ of the winding pipe 3 when the screen 4 is rewound so that the winding of the screen 4 can be performed from the state where the winding of the screen 4 is restricted is larger than that of the fifth embodiment. It is possible to secure.
- the locking portion 52 and the passage portion 53 are arranged at equal intervals over the entire circumference of the guide groove 21.
- the total number of passage parts 53 is N
- the number of locking parts 52 is S
- the number of clutch balls 40 is M
- the stop area A1 is minimized and the passage area A2 is maximized while satisfying the condition that the winding is reliably restricted when the screen 4 is rewound and released. It is possible to do.
- the clutch device 10 of the present invention can be configured without satisfying the above equation, and the guide groove 21 is not separated into the stop region A1 and the passage region A2 as in the second embodiment. Of course it is also possible.
- FIG. 13A and 13B show a horizontal blind as a shielding device according to a seventh embodiment, where FIG. 13A is a front view and FIG. 13B is a CC cross-sectional view of FIG.
- the horizontal blind according to the present embodiment includes a head box 101 and a plurality of slats 104 as shielding members, and the slats 104 and the bottom rail 106 are supported by a plurality of ladder cords (not shown) suspended from the head box 101. Has been.
- each lifting cord 109 is suspended from the head box 101, the upper end portion of each lifting cord 109 is wound around a winding cone 108 disposed in the head box 101, and the lower end portion is attached to the bottom rail 106. It is connected.
- Each winding cone 108 is attached to a winding shaft 103 disposed in the head box 101.
- the winding shaft 103 is rotated by the operation of an endless loop-like lifting operation cord 107, each winding cone 108 is interlocked. To rotate. Then, the lifting / lowering cord 109 is wound or unwound by the rotation of each winding cone 108, and the lifting / lowering operation of the slat is performed.
- the horizontal blind includes a clutch device 10 that selectively switches between restriction and release of rotation of the winding shaft 103 in the rewinding direction.
- the clutch device 10 By this clutch device 10, the slat 104 and the bottom rail are provided. It is possible to switch between a state in which the weight is lowered by 106 and a state in which the weight is lowered.
- the clutch drum 20 has a through hole 24 into which the winding shaft 103 can be inserted so as not to be relatively rotatable, and the outer surface of the clutch case 30 is fixed to the head box 101 so as not to be relatively rotatable.
- This is mainly different from that of the first embodiment in that it has a rectangular parallelepiped shape. That is, in this embodiment, the clutch case 30 does not rotate, and the clutch drum 20 side rotates with the rotation of the winding shaft 103. Further, the clutch balls 40 a and 40 b move only in the axial direction along the guide groove 21 in the slide grooves 23 a and 23 b of the clutch case 30 as the clutch drum 20 rotates. However, in the following description, it is assumed that the clutch balls 40 a and 40 b move relative to the guide groove 21.
- the clutch drum 20 is installed in such a direction that the clutch ball 40 moves in the urging direction F of FIG. 4 when the slat 104 is lowered by its own weight. That is, the take-up shaft 103 corresponds to the “rotary body” in the claims, and it is claimed that the slat 104 and the bottom rail 106, which are shielding members, urge the take-up shaft 103 in the rewind direction by its own weight. Corresponds to the “energization” of the range.
- the clutch device of the first embodiment is introduced into the self-weight drop type blind, after the slat 104 is wound up to a desired position, the lifting operation cord 107 is released, and then the winding shaft 103 is rotated. And the return angle until the weight descent of the slat 104 stops can be reduced. Accordingly, the slat 104 can be accurately positioned.
- the clutch device 10 is used for a horizontal blind, but it can also be applied to other self-weight drop type shielding devices such as a pleated screen and a roman shade.
- FIG. 14 is a front view of a roll screen according to the eighth embodiment.
- the roll screen of the eighth embodiment is mainly different from the first embodiment in the configuration of the clutch device 10, and the following description will focus on this difference.
- the clutch device 10 of the present embodiment is composed of two clutch devices having substantially the same configuration, that is, a first clutch device 10A and a second clutch device 10B.
- the configuration of the first clutch device 10A and the second clutch device 10B is such that the shape of the guide grooves 21A and 21B (see FIG. 15) and the number of clutch balls arranged on each of the guide grooves 21A and 21B are one each. Except for a certain point, it is almost the same as the clutch device 10 of the first embodiment.
- the clutch devices 10A and 10B can have a known configuration as disclosed in Japanese Patent No. 3124716, and the configuration and operation described in the patent publication are described in this specification. Incorporated.
- the first clutch device 10A includes a clutch drum 20 and a clutch case 30 (see FIG. 3), and an endless guide groove 21A is formed on the outer peripheral surface of the clutch case 30 as shown in FIG. Thus, only one clutch ball 40A is disposed on the guide groove 21A.
- the guide groove 21A includes an accumulating direction circumferential groove 50A, left and right energizing direction circumferential grooves 50A, four locking portions 52A, four return grooves 54A, and four release grooves 56A that are shifted in phase by 90 degrees.
- the clutch ball 40A circulates in the energy accumulation direction C in the energy accumulation direction circumferential groove 50A. After that, when the screen 4 is released, the clutch ball 40A moves in the energizing direction circumferential groove 51A in the energizing direction (see FIG. 15), and is latched by one of the four latching portions 52A. The ascent is stopped.
- the clutch ball 40A is guided to the urging direction circumferential groove 51A via the release groove 56A, and the screen 4 is moved in a state where the clutch ball 40A is guided to the urging direction circumferential groove 51A.
- the clutch ball 40A goes around the energizing direction circumferential groove 51A in the energizing direction so that the screen 4 is pulled up.
- the first clutch device 10A as described above has a clutch drum 20 (not shown) attached to the front end side of the fixed shaft 5b fixed to the bracket 2b so as not to be relatively rotatable.
- the clutch drum 20 (not shown) is attached to the base end side of the fixed shaft 5b so as not to be relatively rotatable.
- Each clutch case 30 of the first clutch device 10 ⁇ / b> A and the second clutch device 10 ⁇ / b> B is attached to the take-up pipe 3 and rotates in conjunction with the take-up pipe 3.
- the clutch drums 20 of the first clutch device 10A and the second clutch device 10B are fixed in a state where the phases of the respective guide grooves 21A and 21B have shifted 45 degrees. That is, as shown in FIG. 15, each configuration of the guide grooves 21A and 21B is shifted by 45 degrees.
- the clutch ball 40A and the clutch ball 40B are in the same phase.
- the clutch ball 40A of the first clutch device 10A is locked to the locking portion 52A
- the clutch ball of the second clutch device 10B. 40B is not locked to the locking portion 52B (the state shown in FIG. 15).
- the clutch ball 40B of the second clutch device 10B is locked to the locking portion 52B
- the first clutch device 10A is not locked to the locking portion 52A.
- the clutch device 10 described in the above-mentioned patent publication includes one clutch ball 40 and four locking portions 52 that are out of phase by 90 degrees, so the maximum return angle is about 90 degrees.
- the first clutch device 10A and the second clutch device 10B are each provided with four locking portions 52 that are out of phase by 90 degrees, and the guide grooves 21A, Since 21B is provided in a state where the phase is shifted by 45 degrees, the maximum return angle is reduced to about 45 degrees.
- the phase difference between the guide groove 21A and the guide groove 21B is 45 degrees. However, this phase difference may be set any number of times as long as it does not become the same phase.
- the first clutch device 10A and the second clutch device 10B are both attached to the fixed shaft 5b. However, each clutch drum 20 is not rotatable with respect to the bracket 2a or the bracket 2b, and each clutch As long as the case 30 is attached to the take-up pipe 3, the first clutch device 10 ⁇ / b> A and the second clutch device 10 ⁇ / b> B can be arranged at arbitrary positions in the take-up pipe 3.
- the first clutch device 10A can be disposed on the bracket 2a side
- the second clutch device 10B can be disposed on the bracket 2b side.
- the plurality of clutch devices 10A and 10B cooperate to function as the clutch device 10 of the present invention.
- the clutch device 10 includes the two clutch devices of the first clutch device 10A and the second clutch device 10B.
- the clutch device 10 includes three clutch devices by changing the phases of the guide grooves of the clutch devices. It is also possible to provide the clutch device 10 described above.
- the phase of the guide grooves 21A and 21B is fixed in a state of being shifted by 45 degrees, but no phase difference is created between the guide grooves 21A and 21B, and the phase difference between the clutch balls 40A and 40B. May be provided.
- the two clutch cases 30 of the clutch devices 10 ⁇ / b> A and 10 ⁇ / b> B are fixed to the winding pipe 3 while being shifted by a predetermined angle.
- a clutch device 10 is introduced into a curtain rail as a shielding device.
- the curtain rail includes a hanger rail 201, a number of runners 203a and 203b supported so as to be movable along the support ribs 201d of the hanger rail 201, and a curtain as a shielding member supported by the runners 203a and 203b. 204.
- the curtain rail is provided on the loop belt 203 as a rotating body that supports the runners 203a and 203b disposed in the hanger rail 201, and on one end side of the hanger rail 201 (right side in FIGS. 16A and 16B).
- the clutch drum 20 that hangs the loop belt 203 and the pulley 219 that hangs the loop belt 203 on the other end side of the hanger rail 201 are provided.
- one end and the other end of the operation cord 207 are respectively attached to the position P1 and the position P2 of the loop belt 203, and the central portion of the operation cord 207 is drawn downward from the hanger rail 201 via the pulley 215. ing.
- the operation code 207 By operating the operation code 207, the loop belt 203 is rotated between the pulley 209 and the clutch drum 20, and the leading runner 203a can be moved.
- the curtain rail of the present embodiment includes urging means 205 that moves the curtain 204 in the closing direction (or the opening direction) via the loop belt 203 by urging the clutch drum 20, and the clutch drum 20 and
- the clutch device 10 includes a clutch case 30 and restricts the rotation of the clutch drum 20 to restrict the movement of the curtain 204 in the closing direction.
- the urging unit 205 includes a coil spring 205 a having one end connected to a housing 205 b fixed to the clutch case 30 and the other end connected to a transmission shaft 205 c that rotates integrally with the clutch drum 20.
- the coil spring 205a of the biasing means 205 biases the clutch drum 20 in the direction in which the curtain 204 closes, and the direction in which the clutch drum 20 rotates when the curtain 204 closes is defined as the biasing direction. To do.
- the operation cord 207 when the operation cord 207 is operated to rotate the clutch drum 20 in the opening direction, the coil spring 205a is stored, and the stored coil spring 205a causes the clutch drum 20 to be attached in the closing direction of the curtain 104. Be forced.
- the runners 3 a and 3 b are energized in the closing direction of the curtain 204 via the loop belt 203.
- the clutch device 10 includes a cylindrical clutch drum 20 that is looped around a loop belt 203 and also functions as a pulley, and is disposed on the outer periphery of the clutch drum 20 and is fixed to the hanger rail 201.
- a clutch case 30 and two clutch balls 40a and 40b are mainly provided.
- the clutch drum 20 is supported so as to be rotatable with respect to the clutch case 30.
- a square hole 20h that opens downward is provided at the center of rotation of the clutch drum 20
- a through hole 30h is provided at a position corresponding to the square hole 20h of the clutch case 30, and the transmission shaft 205h is a through hole. It is inserted into the square hole 20h through 30h so as not to be relatively rotatable.
- Endless guide grooves 21A and 21B are formed on the upper end surface 20A and the lower end surface 20B of the clutch drum 20 in the circumferential direction, respectively.
- the inner surface of the clutch case 30 is provided with slide grooves 32A and 32B extending in one direction outward from the vicinity of the through hole 30h on the upper surface 30A and the lower surface 30B facing the guide grooves 21A and 21B.
- the clutch balls 40A and 40B are arranged between the guide grooves 21A and 21B and the slide grooves 32A and 32B.
- the clutch balls 40A and 40B can move in the slide grooves 32A and 32B along the guide grooves 21A and 21B as the clutch drum 20 rotates. In the following description, it is assumed that the clutch balls 40A and 40B move relative to the guide grooves 21A and 21B.
- the guide grooves 21A and 21B will be described. As shown in FIG. 18A, the guide grooves 21A and the guide grooves 21B have the same shape and are configured such that only the phase is shifted when viewed from above. Now, the configuration of the guide groove 21A and the operation of the clutch drum 20 based on the configuration will be described.
- the guide groove 21A includes an inner circumferential energy storage direction circumferential groove 50A, an outer circumferential side biasing direction circumferential groove 51A, a locking portion 52A, a return groove 54A, and a release groove.
- a groove 56A is provided. These grooves 50A, 51A, 54A, 56A and the locking portion 52A have the same functions as those in the first embodiment.
- the clutch ball 40A is guided to the locking portion 52A.
- the state where the clutch balls 40A and 40B are in the locking portion 52A is the initial state.
- the clutch drum 20 is biased in the closing direction, so that the clutch balls 40A and 40B are locked by the locking portion 52A. For this reason, the clutch drum 20 does not rotate and the opening of the curtain 204 is maintained.
- the clutch ball 40A moves along the release groove 56A and enters the energizing direction circumferential groove 51A.
- the clutch drum 20 is rotated in the energizing direction F, and the clutch ball 40A moves toward the locking portion 52A along with the rotation. And is locked by the locking portion 52A. Thereby, the opening of the curtain 204 can be maintained at a predetermined position.
- the clutch drum 20 of the present embodiment includes a guide groove 21B having the same configuration and function in addition to the above-described guide groove 21A.
- the guide groove 21A and the guide groove 21B are formed in a state in which the phase is shifted by 180 degrees as shown in FIG. That is, the positions of the locking portion 52A and the locking portion 52B are shifted from the rotation axis of the clutch drum 20 by 180 degrees.
- the slide grooves 32A and 32B and the clutch balls 40A and 40B are in phase.
- This embodiment can also be implemented in the following aspects.
- another urging means such as a spring spring may be employed instead of the coil spring 205a.
- Applying a biasing force directly to the loop belt 203 by directly connecting a tension spring to the loop belt 203 and pulling it from the end of the hanger rail 1 or attaching a cord connected with a weight to the loop belt 203 Is also possible.
- an urging force may be directly applied to the leading runner 203a and the operation code 207. In either case, a biasing force that moves the leading runner 203a in one direction is applied directly or indirectly.
- the shape of the guide groove 21A (guide groove 21B) shown in FIG. 18 is an example, and another configuration having the same function may be used.
- the locking portions 52 can be provided at a plurality of locations in the circumferential direction.
- One guide groove A (guide groove B) It is also possible to arrange a plurality of clutch balls 40A (40B) inside.
- the guide groove 21A, 21B may be provided in the clutch case 30, and the slide groove 32A, 32B may be provided in the clutch drum 20.
- the configuration of the clutch device described in the present embodiment can be applied to a curtain rail in which the operation cord 207 is hung on the clutch drum 20 without the loop belt 203.
- the clutch device 10 includes a one-way clutch 70 between the clutch drum 20 and the clutch case 30, and the clutch device 10 of the first embodiment is that the clutch drum 20 and the clutch case 30 rotate relative to the central shaft 80. Is the main difference. Hereinafter, this difference will be mainly described.
- the clutch device 10 includes a central shaft 80 that is non-rotatably supported by the bracket 2 b (see FIG. 1), and a central shaft 80.
- a cylindrical clutch drum 20 which is attached so as to be relatively rotatable, a cylindrical clutch case 30 which is disposed on the outer periphery of the clutch drum 20 and is fixed to the take-up pipe 3, and between the central shaft 80 and the clutch drum 20.
- the clutch drum 20 has an endless guide groove 21 provided in the circumferential direction on the outer peripheral surface, as shown in FIG.
- the clutch case 30 is attached to the winding pipe 3 so as to rotate integrally.
- two slide grooves 32 a and 32 b extending in the axial direction are formed on the inner peripheral surface of the clutch case 30.
- the slide groove 32a and the slide groove 32b are disposed 90 degrees apart from each other in the circumferential direction as shown in FIG.
- the one-way clutch 70 has an existing configuration, and is attached so as to allow rotation of the clutch drum 20 in the rewind direction with respect to the center shaft 80 and restrict rotation in the winding direction.
- the guide groove 21 is a biasing direction in which the clutch balls 40a and 40b circulate when the clutch case 30 is rotated in the winding direction (direction biased by the coil spring 5 (see FIG. 1)) with respect to the clutch drum 20.
- the circumferential groove 51 and a branch loop 59 branched from the energizing direction circumferential groove 51 are formed.
- the branch loop 59 is formed with a lock groove 59a and a locking portion 52.
- the guide groove 21 is provided with two branch loops 59 (locking portions 52) around the clutch drum 20.
- C accumulating direction
- F energizing direction
- 10 clutch device
- 20 clutch drum
- 21 guide groove
- 30 clutch case
- 50 accumulating direction circumferential groove (circumferential groove in other direction)
- 51 energizing Direction circumferential groove (position direction circumferential groove)
- 52 locking portion
- 53 passage portion
- 54 return groove
- 55 guide groove
- 56 release groove
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
- Curtains And Furnishings For Windows Or Doors (AREA)
- Blinds (AREA)
Abstract
Description
(1)1つのガイド溝上に前記移動体が複数配置される。
(2)前記ガイド溝を複数備え、各ガイド溝は少なくとも1つの移動体を有する。
前記移動体は、前記ガイド溝と前記クラッチケースの内周面の少なくとも2ヶ所に軸方向に設けられたスライド溝との間に配設され且つ、前記クラッチドラムの回転に伴って前記スライド溝内を移動しながら前記ガイド溝内を相対移動する。
(1)構成の説明
(1-1)ロールスクリーン全体の構成
図1に示す遮蔽装置としてのロールスクリーンは、窓の上枠等に固定される枠体1の両側にブラケット2a,2bが取り付けられ、これらブラケット2a,2bの間に回転体としての巻取パイプ3が回転可能に支持されており、その巻取パイプ3からスクリーン4が吊下支持されている。
次に、クラッチ装置10の構造を詳細に説明する。クラッチ装置10は、図2及び図3(a)に示すように、ブラケット2b(図1参照)に基端部20aが回転不能に支持される円筒形状のクラッチドラム20と、このクラッチドラム20の外周に配置されるとともに巻取パイプ3に固定される円筒形状のクラッチケース30と、移動体としての2つのクラッチボール40a,40bとを主に備えている。なお、これらの部材は例えば樹脂製となっている。
クラッチドラム20は、細径の基端部20a(図3(a)の右側部分)と、基端部20aよりも太径の本体部20bとが一体となって形成されている。基端部20aは角軸となっており、ブラケット2bに取り付けられたブラケットシャフト(図示せず)に嵌合固定される。そして、本体部20bの外周面には、円周方向に設けられた無端状のガイド溝21を有している。ガイド溝21の構成については後述する。
クラッチケース30は、図3(a)及び図3(b)のA-A断面図に示すように、クラッチドラム20の外周面に相対回転可能に配置され、巻取パイプ3の内径よりも僅かに小径となっており、巻取パイプ3内に挿入して固定することで、巻取パイプ3と一体回転するようになっている。クラッチケース30の内周面には、内径が小さくなった狭径部31と、クラッチケース30の端部33(図3(a)の左端)から狭径部31まで軸方向に連続する2つのスライド溝32a,32bとが形成されている。
次に、ガイド溝21の構成を図4に示す展開図を用いて説明する。図4において、スクリーン4(図1参照)が巻取られるとき、2つのクラッチボール40a,40bはガイド溝21に対してそれぞれ図の下方へ相対的に移動し、スクリーン4が巻戻されるとき、クラッチボール40a,40bはガイド溝21に対してそれぞれ図の上方へ相対的に移動する。
ガイド溝21の中央部には、クラッチドラム20とクラッチケース30を蓄勢方向に相対回転させた時、すなわちクラッチドラム20に対してクラッチケース30を蓄勢方向に回転させた時にクラッチボール40a,40bが蓄勢方向Cに周回する蓄勢方向周回溝50が周方向環状に形成される。蓄勢方向周回溝50の両側には、クラッチドラム20とクラッチケース30を付勢方向に相対回転させた時、すなわちクラッチドラム20に対してクラッチケース30を付勢方向に回転させた時にクラッチボール40a,40bが周回する右付勢方向周回溝51aと左付勢方向周回溝51bとが周方向環状に形成される。
蓄勢方向周回溝50と左右の付勢方向周回溝51a,51bとの間には、クラッチボール40a,40bの付勢方向Fの周回を規制する係止部52と、クラッチボール40a,40bの付勢方向Fの周回を規制せず、クラッチボール40a,40bを付勢方向周回溝51a,51bへ案内する通過部53とがそれぞれ6個ずつ、30度(図4参照)おきに等間隔で配置されている。より具体的には、ガイド溝21の略半周、約180度の範囲には6個の係止部52が蓄勢方向周回溝50と右付勢方向周回溝51aの間、蓄勢方向周回溝50と左付勢方向周回溝51bの間に交互に配置されて停止領域A1を形成し、もう一方の約180度の範囲には、通過部53が同様に交互に配置されて通過領域をA2形成している。
また、ガイド溝21は、クラッチボール40a,40bを付勢方向周回溝51から蓄勢方向周回溝50へ案内する戻り溝54と,クラッチボール40a,40bを蓄勢方向周回溝50から係止部52又は通過部53へ案内する誘導溝55と、クラッチボール40a,40bを係止部52又は通過部53から付勢方向周回溝51a,51bへ案内する解除溝56とを備える。
次に、上記のようなクラッチ装置10を備えたロールスクリーンの動作について、図5(a)~図5(d)の説明図をもとに説明する。
まず、ロールスクリーンのスクリーン4をコイルスプリング5(図1参照)の付勢力に抗して巻戻すと、巻取パイプ3を介してクラッチケース30が回転する。このとき、クラッチボール40a,40bは蓄勢方向周回溝50内を蓄勢方向Cへ周回する(図5(a)参照)。クラッチボール40a,40bが付勢方向周回溝51a,51bにある場合には、戻り溝54a,54bによって蓄勢方向周回溝50へ案内された後、周回する。
スクリーン4を所定位置まで巻戻した後スクリーン4を手放すと、同スクリーン4はコイルスプリング5の付勢力により僅かに巻取られた後、その巻取りが停止する。すなわち、スクリーン4の巻戻し時に蓄勢方向周回溝50内を周回していたクラッチボール40a,40bは、スクリーン4を手放すことにより蓄勢方向周回溝50内を付勢方向Fへ移動して、誘導溝55により一方のクラッチボール40aはいずれかの係止部52-xへ案内され、他方のクラッチボール40bは対応する通過部53-xへと案内される(図5(b)参照)。
上述した巻取りが停止した状態から、スクリーン4を若干巻戻すと、クラッチボール40a及びクラッチボール40bは係止部52-x及び通過部53-xから解除溝56を経て、右付勢方向周回溝51a及び左付勢方向周回溝51bのいずれかに案内される(図5(c)参照)。
しかしながら、本実施形態の構成では、戻り溝54を1つの付勢方向周回溝51に対して1つのみ設け、ガイド溝21に係止部42のない通過領域A2を設けるとともに、戻り溝54を通過領域A2の下流側に設けていることから、図6に示すように、クラッチ装置10の回転規制を解除してスクリーン4を巻取るために巻取パイプ3(クラッチケース30)が回転できる回転許容範囲αを、180度よりも大きく設定することができる。
具体的には、スクリーン4を若干巻戻してクラッチボール40a,40bを付勢方向周回溝51a,51bに案内するときには、図6に示すように、停止領域A1側にあったクラッチボール40a(40b)が解除溝56を経て右付勢方向周回溝51a又は左付勢方向周回溝51bに案内された位置(位置P1)から、戻り溝54を経て蓄勢方向周回溝50を蓄勢方向Cへ移動して停止領域A1の最も下流側の係止部52-1よりも上流側に案内される直前の位置(位置Q)までの範囲にクラッチボール40a(40b)を案内して、スクリーン4を手放せば、クラッチボール40a及び40bを付勢方向周回溝51で周回させることができる。
上記のようなロールスクリーンでは、次に示す作用効果を得ることができる。
(イ)2つのクラッチボール40a,40bを180度の間隔で配置し、ガイド溝21の約半周に係止部52を等間隔に6ヶ所設けたので、スクリーン4を所望位置まで巻戻してから同スクリーンを手放した後、巻取パイプ3の回転が規制され、スクリーン4の巻取りが停止するまでの戻り角を小さくすることが可能となる。従って、スクリーン4を所望位置に吊下支持することが容易となる。
(ロ)戻り溝54を1つの付勢方向周回溝51に対して1つのみ設け、ガイド溝21に係止部42のない通過領域A2を設けるとともに、戻り溝54を通過領域A2の下流側に設けているため、クラッチボール40a(40b)が戻り溝54を経て蓄勢方向周回溝50を蓄勢方向Cへ移動して停止領域A1の最も下流側の係止部52-1よりも上流側に案内されるまでの間隔が大きくなっている。従って、スクリーン4の巻取りが規制されている状態からスクリーン4の巻取りが可能となるようにスクリーン4を巻戻す際の巻取パイプ3の回転許容範囲αを十分に確保することができるので、スクリーン4の巻取り操作を容易に行うことができる。
図8は、第2実施形態に係る遮蔽装置であるダブルロールスクリーンを示す。本実施形態は、上述した第1実施形態のものとほぼ同様のクラッチ装置10をダブルロールスクリーンの2つの巻取パイプ3X,3Y内にそれぞれ備えたものとなっており、クラッチ装置10以外の構成については、例えば、国際公開第2013/005524号パンフレットに開示されるような、公知の構成が適用される。
図9は、第3実施形態に係るクラッチ装置10のガイド溝21の展開図を示す。第3実施形態のクラッチ装置10は、ガイド溝21の構成及びスライド溝32a,32bと2つのクラッチボール40a,40bの周方向の間隔(位相差)のみが第1実施形態と異なっており、以下ではこの相違点のみを説明する。
図10は、第4実施形態に係るクラッチ装置10のガイド溝21の展開図を示す。第4実施形態のクラッチ装置10は、ガイド溝21の構成のみが第1実施形態と異なっており、以下ではこの相違点のみを説明する。
図11は、第5実施形態に係るクラッチ装置10のガイド溝21の展開図を示す。第5実施形態のクラッチ装置10は、ガイド溝21の構成及び、クラッチボール40の数が第1実施形態と異なっており、以下ではこの相違点のみを説明する。
図12は、第6実施形態に係るクラッチ装置10のガイド溝21の展開図を示す。第6実施形態のクラッチ装置10は、ガイド溝21の構成及び、クラッチボール40の数が第1実施形態と異なっており、以下ではこの相違点のみを説明する。
図13は、第7実施形態に係る遮蔽装置である横型ブラインドを示し、(a)は正面図、(b)は(a)のC-C断面図である。本実施形態の横型ブラインドは、ヘッドボックス101及び遮蔽部材である複数のスラット104を備え、このスラット104及びボトムレール106はヘッドボックス101から垂下される複数本のラダーコード(図示せず)に支持されている。
まず、昇降操作コード107を操作して横型ブラインドのスラット104を自重による付勢力に抗して巻取ると、巻取軸103を介してクラッチドラム20が回転する。このとき、クラッチボール40a,40bは蓄勢方向周回溝50内を蓄勢方向Cへ周回する(図4参照)。クラッチボール40a,40bが付勢方向周回溝51a,51bにある場合には、戻り溝54a,54bによって蓄勢方向周回溝50へ案内された後、周回する。
スラット104を所定位置まで巻取った後昇降操作コード107を手放すと、スラット104は自重により僅かに降下した後、自重降下が停止する。すなわち、スラット104の巻取り時に蓄勢方向周回溝50内を周回していたクラッチボール40a,40bは、昇降操作コード107を手放すことにより蓄勢方向周回溝50内を付勢方向Fへ移動して、誘導溝55により一方のクラッチボール40aはいずれかの係止部52-xへ案内され、他方のクラッチボール40bは対応する通過部53-xへと案内される。
上述した自重降下が規制された状態から、昇降操作コード107を巻取り方向に若干操作すると、クラッチボール40a及びクラッチボール40bは係止部52-x及び通過部53-xから解除溝56を経て、右付勢方向周回溝51a及び左付勢方向周回溝51bのいずれかに案内される。
図14は、第8実施形態に係るロールスクリーンの正面図を示す。第8実施形態のロールスクリーンは、主にクラッチ装置10の構成が第1実施形態と異なっており、以下ではこの相違点を中心に説明する。
・上述した実施形態では、第1クラッチ装置10A、第2クラッチ装置10Bがともに固定軸5bに取り付けられていたが、各クラッチドラム20がブラケット2a又はブラケット2bに対して回転不能とされ、各クラッチケース30が巻取パイプ3に取り付けられている限り、第1クラッチ装置10Aと第2クラッチ装置10Bは巻取パイプ3内の任意の位置に配置することができる。例えば、第1クラッチ装置10Aをブラケット2a側、第2クラッチ装置10Bをブラケット2b側に配置することも可能である。この場合でも、複数のクラッチ装置10A,10Bが協働して、本発明のクラッチ装置10として機能する。
・上述した実施形態では、クラッチ装置10は第1クラッチ装置10A及び第2クラッチ装置10Bの2つのクラッチ装置を備えていたが、各クラッチ装置のガイド溝の位相を互いに異ならせることで、3つ以上のクラッチ装置10を設けることも可能である。
・上述した実施形態では、ガイド溝21A,21Bの位相が45度ずれた状態で固定されていたが、ガイド溝21A,21B間で位相差は作らず、クラッチボール40A,40Bの間で位相差を設けても良い。この場合、クラッチ装置10A,10Bの2つのクラッチケース30を巻取パイプ3に対して所定の角度ずらして固定することになる。
図16~図18を用いて、本発明の第9実施形態について説明する。本実施形態は、遮蔽装置としてのカーテンレールにクラッチ装置10を導入したものである。
・クラッチドラム20の付勢手段としては、コイルスプリング205aの代わりに、ゼンマイバネなどの別の付勢手段を採用してもよい。ループベルト203に引っ張りバネを直接接続してハンガーレール1の端部から引っ張ることや、錘を接続したコードをループベルト203に取着することによって、ループベルト203に対して付勢力を直接加えることも考えられる。また、先頭ランナー203aや操作コード207に対して付勢力を直接加えてもよい。いずれの場合であっても、先頭ランナー203aを一方向に移動させる付勢力が直接又は間接的に加えられる。
図19及び図20は、第10実施形態に係るクラッチ装置10を示す。このクラッチ装置10は、クラッチドラム20とクラッチケース30の間にワンウェイクラッチ70を備え、クラッチドラム20とクラッチケース30が中心軸80に対してともに相対回転する点が第1実施形態のクラッチ装置10との主な相違点である。以下では、この相違点を中心に説明する。
Claims (12)
- 無端状のガイド溝と、当該ガイド溝に沿って相対移動可能な複数の移動体とを備え、前記ガイド溝は前記移動体を係止する少なくとも1つの係止部を備えており、
下記(1)、(2)の少なくとも1つの構成を備えることで、前記移動体のうちの少なくとも2つが異なるタイミングで前記係止部に係止されるよう構成した、クラッチ装置。
(1)1つのガイド溝上に前記移動体が複数配置される。
(2)前記ガイド溝を複数備え、各ガイド溝は少なくとも1つの移動体を有する。 - 少なくとも1つのクラッチドラムと、当該クラッチドラムの外周に配置されるクラッチケースとを備え、前記クラッチドラムと前記クラッチケースの一方向の相対回転の規制と許容とを選択的に切り替えるクラッチ装置であって、
前記ガイド溝は前記クラッチドラムの外面及び前記クラッチケース内面のいずれか一方に円周方向に亘って設けられており、
前記移動体は、前記クラッチドラムと前記クラッチケースの間の相対回転に伴って前記ガイド溝に沿って相対移動し、前記移動体が前記係止部に係止されることで、前記クラッチドラムと前記クラッチケースの間の一方向の相対回転が規制される、請求項1に記載のクラッチ装置。 - 前記ガイド溝は、前記クラッチドラムと前記クラッチケースを前記一方向に相対回転させた時に前記移動体が周回する一方向周回溝と、
前記クラッチドラムと前記クラッチケースを他方向に相対回転させた時に前記移動体が周回する他方向周回溝と、
前記移動体が前記一方向周回溝にある状態で前記クラッチドラムと前記クラッチケースを前記他方向に相対回転させたとき、前記移動体を前記一方向周回溝から前記他方向周回溝へ案内する少なくとも1つの戻り溝と、をさらに備える、請求項2に記載のクラッチ装置。 - 前記ガイド溝は、前記他方向周回溝と前記一方向周回溝との間に前記係止部と周方向に離間して設けられ、前記クラッチドラムと前記クラッチケースの前記一方向の相対回転を規制せず前記移動体を前記一方向周回溝へ案内する少なくとも1つの通過部と、備えるとともに、
前記移動体が前記他方向周回溝にある状態で前記クラッチドラムと前記クラッチケースを前記一方向に相対回転させたとき、前記移動体を前記他方向周回溝から前記係止部又は前記通過部へ案内する複数の誘導溝と、
前記移動体が前記係止部又は前記通過部にある状態で前記クラッチドラムと前記クラッチケースを前記他方向に相対回転させたとき、前記移動体を前記係止部又は前記通過部から一方向周回溝へ案内する解除溝とをさらに備える、請求項3に記載のクラッチ装置。 - 前記ガイド溝は前記係止部及び前記通過部をそれぞれ複数備え、前記通過部の1つが、前記戻り溝の一部を構成している、請求項4に記載のクラッチ装置。
- 1つの移動体が任意の通過部又は当該通過部と同位相となる位置にあるとき、前記1つの移動体以外の少なくとも1つの移動体は、いずれか1つの係止部又は当該いずれか1つの係止部と同位相となる位置にあるよう構成される、請求項4又は請求項5に記載のクラッチ装置。
- 前記ガイド溝には、等間隔で前記係止部又は前記通過部が配置されており、前記複数の移動体は前記間隔の整数倍離間している、請求項4~請求項6のいずれかに記載のクラッチ装置。
- 前記ガイド溝は、複数の係止部が配置される停止領域と複数の通過部が配置される通過領域とに分割されており、前記戻り溝は、前記通過領域内の前記一方向の位置に、1つの前記一方向周回溝に対してただ1つ配置される、請求項7に記載のクラッチ装置。
- 前記移動体が前記ガイド溝に約180°の間隔で2つ配置され、前記ガイド溝の略半周が停止領域とされ、前記ガイド溝の他の略半周が通過領域とされており、一方の移動体が任意の通過部又は当該通過部と同位相となる位置にあるとき、他方の移動体はいずれか1つの係止部又は当該いずれか1つの係止部と同位相となる位置にあるよう構成される、請求項8に記載のクラッチ装置。
- 前記ガイド溝が前記クラッチドラムの外周面に設けられており、
前記移動体は、前記ガイド溝と前記クラッチケースの内周面の少なくとも2ヶ所に軸方向に設けられたスライド溝との間に配設され且つ、前記クラッチドラムの回転に伴って前記スライド溝内を移動しながら前記ガイド溝内を相対移動する、請求項2~請求項9に記載のクラッチ装置。 - 前記ガイド溝が、前記クラッチドラムの少なくとも一方の端面に設けられている、請求項2~請求項10に記載のクラッチ装置。
- 請求項1~請求項11のいずれかに記載のクラッチ装置を備えた遮蔽装置であって、
一方向に付勢された回転体と、当該回転体の回転に伴って開閉可能な遮蔽部材とを有しており、
前記移動体は、前記回転体の回転に伴って前記ガイド溝に沿って相対移動する、遮蔽装置。
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PL218655B1 (pl) * | 2009-05-05 | 2015-01-30 | Franc Gardiner Spółka Z Ograniczoną Odpowiedzialnością | Mechanizm blokujący ruch obrotowy wałka nawojowego rolety o napędzie sprężynowym, zwłaszcza rolety okiennej |
JP5666965B2 (ja) * | 2011-04-08 | 2015-02-12 | トーソー株式会社 | 日射遮蔽装置 |
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