JP2017066675A - Driving force transmission device of solar shading device - Google Patents

Abstract

Provided is a driving force transmission device for a solar shading device that can change a moving speed in an initial motion of a solar shading member with respect to other than the initial motion.
A sun gear member to which an input shaft is connected, a planetary gear member that is located around the sun gear member and meshes with the sun gear member, and the planetary gear member is connected to the sun gear member. A carrier 23 that is supported so as to be capable of rotating and revolving and to which a drive shaft is connected, an internal gear member 24 that is located outside the planetary gear member 22 and meshes with the planetary gear member 22, and a case that rotatably accommodates the internal gear member 24. 25. The internal gear member 24 is further provided with a clutch plate 26 that sets the state of the internal gear member 24 to the locked state in the initial movement in the rotation of the input shaft and switches the locked state to the released state after the initial movement. By rotating the drive shaft at a slower second speed and releasing the locked state, the drive shaft is rotated at the first speed.
[Selection] Figure 3

Description

  The present invention relates to a driving force transmission device for a solar shading device for transmitting an operating force for moving the solar shading member to the solar shading member.

  2. Description of the Related Art Conventionally, there is a horizontal blind, which is one type of solar shading device, that allows a slat to be raised and lowered and angle-adjusted by rotating a take-up shaft by operating an operation cord (see Patent Document 1). That is, the slat is lowered by feeding the lifting / lowering cord from the winding shaft, and the slat is pulled up by winding the lifting / lowering cord on the winding shaft. Moreover, before the raising / lowering operation | movement of a slat starts, a slat is rotated and it raises / lowers in the state which rotated each slat to the substantially fully closed state.

JP 2014-221970 A

  By the way, when each slat is rotated in the initial movement in the raising and lowering operation of the slat, if the operation speed for rotating the winding shaft is excessively high, the slat may be insufficiently rotated. That is, if the speed of the operation for rotating the winding shaft is excessively high, the rotation of the slats may not be able to follow the movement of the ladder cord. Such insufficient tracking of the slats detracts from aesthetics.

  The insufficient tracking of the slats described above is a problem caused by the initial motion speed at which the solar radiation shielding member starts to move among the movement speeds of the solar radiation shielding member. And in the solar shading device including various blinds and roll screens, there are some scenes that require a lower moving speed than the initial movement for the initial movement of the solar shading member. Some scenes are required.

  An object of the present invention is to provide a driving force transmission device for a solar shading device that can change the moving speed in the initial motion of the solar shading member with respect to other than the initial motion.

  A driving force transmission device for a solar shading device for solving the above problems includes an input shaft that is rotated by an operation of an operation unit that operates to move the solar shading member, and a driving shaft that outputs a force for moving the solar shading member. And a driving force transmitting portion that transmits rotation of the input shaft to the driving shaft between the input shaft and the driving shaft. The driving force transmission unit is positioned around the sun gear member, is arranged around the sun gear member, and meshes with the sun gear member, and the planetary gear member can rotate and revolve with respect to the sun gear member. A carrier configured to support and revolve with the revolution of the planetary gear member; an internal gear member that is located outside the planetary gear member and meshes with the planetary gear member; and the internal gear member is rotatable. A housing case. Any one of the sun gear member, the carrier, and the internal gear member is an input unit connected to the input shaft, and one other than the input unit is an output unit connected to the drive shaft. The remaining one is a fixed portion having a locked state in which the case does not rotate. A switching unit is further provided that sets the state of the fixed part to the locked state in the initial movement of the input shaft and switches the locked state to the released state after the initial movement. In the locked state, the output unit is rotated according to a gear ratio based on the number of teeth of the sun gear member and the number of teeth of the internal gear member, and the locked state is released, so that the gear ratio is obeyed. The output section is rotated at a rotation speed different from the rotation speed.

  In the driving force transmission device of the solar shading device, the input part is the sun gear member, the output part is the carrier, the fixing part is the internal gear member, and the switching part is the case. A clutch plate that controls rotation of the internal gear member relative to the case with the internal gear member, and when the clutch plate sets the internal gear member in the locked state, the carrier is The carrier and the internal gear member are directly connected by decelerating the rotation input to the sun gear member and rotating the drive shaft so that the clutch plate releases the locked state of the internal gear member. The carrier may rotate the drive shaft at the same speed as the rotation input to the sun gear member.

  In the driving force transmission device for the solar radiation shielding device, the clutch plate is disposed between the internal gear member and the case so as not to rotate with respect to the internal gear member. The case has a facing surface facing the contact surface on the inner surface, and the clutch plate has the internal gear member when the contact surface is in contact with the facing surface. The locking state may be set and the locking state of the internal gear member may be released when the contact surface is separated from the facing surface.

  In the driving force transmission device of the solar shading device, the carrier includes a shaft connection portion to which the drive shaft is connected, the clutch plate includes an insertion hole in a central portion, and the shaft connection portion includes the clutch plate. One of the outer peripheral surface of the shaft connecting portion and the inner peripheral surface of the insertion hole has a protrusion, and the other without the protrusion is a cam groove with which the protrusion engages. The cam groove is a first groove part that sets the internal gear member in the locked state, and a second groove part that is continuous with the first groove part, the contact surface being separated from the facing surface, You may make it have the said 2nd groove part which cancels | releases the said latching state of the said internal gear member.

  In the driving force transmission device for the solar radiation shielding device, the carrier has a rotation restricting portion that restricts rotation with respect to the internal gear member, and the internal gear member has an engaging portion that engages with the rotation restricting portion. And when the said rotation control part and the said engaging part engage, you may make it the said carrier and the said internal gear member connect directly.

  In the driving force transmission device of the solar shading device, in the initial movement until the rotation restricting portion and the engaging portion are engaged, the clutch plate sets the internal gear member to the locked state, The carrier decelerates the rotation input to the sun gear member and rotates the drive shaft. Following the initial movement, the carrier rotates and the clutch plate is released from the locked state of the internal gear member. And when the rotation restricting portion and the engaging portion are engaged and the carrier and the internal gear member are directly connected, the carrier is at the same speed as the rotation input to the sun gear member. The drive shaft may be rotated.

  According to the driving force transmission device of the solar shading device of the present invention, it is possible to provide the driving force transmission device of the solar shading device that can change the moving speed in the initial motion of the solar shading member with respect to other than the initial motion.

(A) is a front view of the horizontal blind in this embodiment, (b) is sectional drawing which shows the internal structure of the head box of a horizontal blind. It is a perspective view which shows the external appearance of the driving force transmission part of the horizontal blind in one Embodiment. It is a disassembled perspective view of the driving force transmission part of the horizontal blind in one embodiment. It is a disassembled perspective view which shows the relationship between the sun gear member in one Embodiment, a planetary gear member, and a carrier. It is a disassembled perspective view which shows the relationship between the planetary gear member and internal gear member in one Embodiment. It is sectional drawing which shows the state which the sun gear, planetary gear, and internal gear in one Embodiment meshed | engaged. It is sectional drawing which shows the relationship between the rotation control part of the carrier in one Embodiment, and the engaging part of an internal gear member. It is a disassembled perspective view which shows the relationship between the internal gear member and clutch plate in one Embodiment. It is sectional drawing which shows the positional relationship of the clutch plate with respect to the cam groove in one Embodiment. It is a perspective view which shows the relationship between the internal gear member to which the clutch plate in one Embodiment was attached, and a case. It is sectional drawing which shows the state which decelerates the rotation of the sun gear member in one Embodiment, and outputs it to a carrier. It is a side view showing the state where it was in the fully closed state when lowering the slat in the horizontal blind in one embodiment. It is sectional drawing which shows the state which outputs rotation of the sun gear member in one Embodiment to a carrier at constant speed. It is a side view which shows the state which became the reverse fully closed state, when raising a slat in the horizontal blind in one Embodiment.

  A horizontal blind according to an embodiment embodying the driving force transmission device of the solar shading device of the present invention will be described with reference to FIGS.

  In the horizontal blind shown in FIGS. 1A and 1B, a plurality of slats 3 are suspended and supported parallel to each other as a solar radiation shielding member via a plurality of ladder cords 2 suspended from the head box 1. The upper end portion of each ladder cord 2 is supported by a slat angle adjusting device disposed in the head box 1, and the lower end is connected to the bottom rail 4. In the vicinity of the ladder cord 2, a plurality of elevating cords 5 suspended from the head box 1 are inserted into the slat 3, and the upper end portions of the elevating cords 5 are rotatably supported in the head box 1. It is wound around the winding shaft 11 and its lower end is connected to the bottom rail 4.

  A pulley case 6 is provided at one end of the head box 1, and an endless operation cord 7 is suspended from the pulley case 6. A pulley is rotatably supported in the pulley case 6, and the pulley is rotated forward and backward by operation of the operation cord 7. The operation cord 7 and the pulley case 6 constitute an operation unit of a horizontal blind.

A gear box 12 is disposed inside one end of the head box 1, and a driving force transmission unit 9 is disposed adjacent to the gear box 12. When the operation cord 7 is pulled in one direction or the other direction, the pulley is rotated, and the input shaft 8 of the gear box 12 is rotated forward and backward. The driving force transmission unit 9 rotates the drive shaft 14 forward and backward based on forward and reverse rotation of the input shaft 8. The drive shaft 14 is connected to the winding shaft 11. When the drive shaft 14 is rotated in the forward direction, the winding shaft 11 is rotated in the feeding direction which is the first rotation direction of the lifting / lowering cord 5, and the slat 3 and the bottom rail 4 are moved downward in the first direction and lowered. The When the drive shaft 14 is reversed, the winding shaft 11 is rotated in the winding direction that is the second rotation direction of the lifting / lowering cord 5, and the slat 3 and the bottom rail 4 are moved upward in the second direction, Be raised. In the horizontal blind, the slat angle adjusting device operates in parallel with the raising / lowering operation of the slat 3 based on the forward / reverse rotation of the winding shaft 11, and each slat 3 is rotated in the same phase via the ladder cord 2. The In addition, after each slat 3 is rotated to a substantially vertical direction, the slat 3 is raised / lowered in the rotated state. The operation cord 7, the input shaft 8, the pulley case 6, and the driving force transmission unit 9 constitute a driving unit that rotates the driving shaft 14 for rotating the slat 3 and moving the slat 3.
The head box 1 is fixed to an attachment surface such as an upper portion of a window via attachment brackets 10 attached to at least both ends thereof. As shown in FIG. 2, a brake drum 13 is disposed on the driving force transmission unit 9 on the driving shaft 14 side. The brake drum 13 rotates the drive shaft 14 based on the rotation of the input shaft 8 when the operation cord 7 is operated, and prevents the drive shaft 14 from rotating when the operation cord 7 is not operated.

  Next, a specific configuration of the driving force transmission unit 9 will be described. As shown in FIG. 3, the driving force transmission unit 9 includes a planetary gear mechanism in the case 25. The driving force transmission unit 9 supports a sun gear member 21 as an input unit to which the input shaft 8 is connected, a plurality of planetary gear members 22 positioned around the sun gear member 21, and a plurality of planetary gear members 22. A carrier 23 serving as an output unit and an internal gear member 24 that is positioned outside the planetary gear member 22 supported by the carrier 23 and also serves as a fixed unit are provided. The internal gear member 24 is rotatably accommodated in the case 25. Further, the case 25 includes a clutch plate 26 as a switching portion that controls the rotation of the internal gear member 24 with respect to the case 25.

  As shown in FIG. 3, the sun gear member 21 includes a base 21B having a disk shape. At the central part of each surface of the base 21B, a cylindrical part having the center axis aligned with each other is provided. The cylindrical portion of the surface of the base 21B facing the gear box 12 constitutes an input shaft connecting portion 21C to which the input shaft 8 of the gear box 12 is connected. As shown in FIG. 4, a sun gear 21 </ b> S is provided on the outer peripheral surface of the cylindrical portion on the surface opposite to the surface provided with the input shaft connection portion 21 </ b> C of the base 21 </ b> B. The sun gear 21S is, for example, a spur gear and an external gear. When the input shaft connecting portion 21 </ b> C is connected to the input shaft 8, it rotates integrally with the input shaft 8.

  The planetary gear member 22 is supported by the carrier 23 so as to rotate and revolve. Here, four planetary gear members 22 are provided, and each planetary gear member 22 includes a planetary gear 22P and a rotation shaft 22S of the planetary gear 22P, and a rotation shaft 22S is formed in a central shaft hole of each planetary gear 22P. Is fixed. The planetary gear 22P is, for example, a spur gear and an external gear.

  The carrier 23 includes a gear arrangement portion 31 where the planetary gear member 22 and the like are arranged, and a drive shaft connection portion 32 to which the drive shaft 14 is connected. The gear arrangement portion 31 has a flat cylindrical shape as a whole, and a gear support portion 33 in which the four planetary gear members 22 are arranged is formed on the outer peripheral portion. The gear support 33 is a space formed by a pair of opposed first flat plate 33A and second flat plate 33B, and supports the rotation shaft 22S of the planetary gear 22P on the first flat plate 33A and the second flat plate 33B. A support hole 33H is provided. Each planetary gear member 22 is rotatably arranged by the rotation shaft 22S being pivotally supported in the support hole 33H of each gear support portion 33. As shown in FIG. 3, the center part of the 2nd flat plate 33B enclosed by the gear support part 33 is provided with the opening part 34 into which the sun gear 21S approachs. The opening 34 has, for example, a circular shape, and has a size that allows the sun gear 21 </ b> S having an opening at the center of the first flat plate 33 </ b> A on the side where the gear box 12 is disposed to enter. A part of the four planetary gears 22P faces the inside of the opening 34, and the sun gear 21S meshes with the four planetary gears 22P when arranged in the opening 34. Further, an exposure hole 37 that exposes a part of the planetary gear 22P to the outside corresponding to the position of each gear support portion 33 is provided on the outer peripheral surface of the gear arrangement portion 31. A part of the planetary gear 22P exposed from the exposure hole 37 meshes with the internal gear when it is accommodated in the internal gear member 24. The shape of the opening 34 may be a rectangular shape or a polygon as long as the sun gear 21S can enter. As described above, the carrier 23 is configured to support the planetary gear member 22 with respect to the sun gear member 21 so as to rotate and revolve, and to revolve with the revolution of the planetary gear member 22.

  As shown in FIG. 4, the drive shaft connecting portion 32 is disposed at the center of the second flat plate 33 </ b> B opposite to the opening of the opening 34 and is configured by a cylindrical portion. The drive shaft 14 is connected to the tip of the cylindrical portion. The drive shaft connecting portion 32 rotates integrally with the drive shaft 14 when the drive shaft 14 is connected. A cam groove 35 for moving the clutch plate 26 is provided on the outer peripheral surface of the drive shaft connecting portion 32. The cam groove 35 is a groove that is continuous in the circumferential direction of the drive shaft connection portion 32, and includes a first groove portion 35 </ b> A that is close to the distal end portion of the drive shaft connection portion 32 and a second groove portion 35 </ b> B that is close to the base end portion of the drive shaft connection portion 32. And an inclined portion 35C that connects the first groove portion 35A and the second groove portion 35B. The cam groove 35 is engaged with a projection 53 of the clutch plate 26 described later, and moves the clutch plate 26 along the drive shaft connecting portion 32. Further, the outer peripheral surface of the drive shaft connecting portion 32 connects the tip of the drive shaft connecting portion 32 and the cam groove 35, and the entry groove 38 that allows the protrusion 53 to enter the cam groove 35 from the tip of the drive shaft connecting portion 32. It has. The entrance groove 38 is provided along the axial direction of the drive shaft connecting portion 32.

  The second flat plate 33 </ b> B on which the drive shaft connecting portion 32 is disposed is a plate facing the partition plate 41 of the internal gear member 24, and the outer periphery from the base end portion of the drive shaft connecting portion 32 on the surface facing the partition plate 41. A rotation restricting portion 36 protruding toward the portion is provided. The rotation restricting portion 36 engages with the engaging portion 46 of the internal gear member 24 to restrict the rotation with respect to the internal gear member 24. The rotation restricting portion 36 is provided from the base end of the drive shaft connecting portion 32 toward the outer periphery.

  As shown in FIG. 3, the internal gear member 24 is of a size that can accommodate the carrier 23 and has an overall cylindrical shape. In the internal space portion of the internal gear member 24, a partition plate 41 is disposed in the middle in the rotation axis direction, and a first space portion in which the gear placement portion 31 of the carrier 23 is disposed on one side of the partition plate 41. 42 is configured, and on the other side, a second space 43 in which the clutch plate 26 is disposed is configured. The partition plate 41 is provided with a communication hole 44 at the center. When the gear arrangement portion 31 of the carrier 23 is arranged in the first space portion 42, the drive shaft connection portion 32 is inserted into the communication hole 44 so that the drive shaft connection portion 32 faces the second space portion 43.

  As shown in FIG. 5, the inner peripheral surface of the first cylindrical portion 42 </ b> A constituting the first space portion 42 is provided with an internal gear 45 constituted by, for example, spur teeth. As shown in FIG. 6, when the drive shaft connecting portion 32 is communicated with the communication hole 44 and the gear placement portion 31 is placed in the first space portion 42, the planetary gear 22P meshes with the sun gear 21S on the center side, The outer gear engages with the internal gear 45. In the planetary gear mechanism, the gear ratio is adjusted by adjusting the number of teeth of the sun gear 21S, the planetary gear 22P, and the internal gear 45. Here, the number of teeth is adjusted so that rotation input to the sun gear 21S is decelerated and output from the carrier 23.

  As shown in FIG. 5, the partition plate 41 that constitutes the first space portion 42 has an engaging portion 46 that engages with the rotation restricting portion 36 on a surface facing the second flat plate 33 </ b> B that constitutes the gear placement portion 31. Is arranged. The engaging portion 46 has a triangular shape that faces the center of the partition plate 41 from the inner peripheral surface of the first cylindrical portion 42A. As shown in FIG. 7, the carrier 23 rotates with respect to the internal gear member 24 until the rotation restricting portion 36 and the engaging portion 46 are engaged, and the rotation restricting portion 36 and the engaging portion 46 are connected. When engaged, it rotates together with the internal gear member 24 relative to the case 25.

  As shown in FIG. 8, the clutch plate 26 that controls the rotation of the internal gear member 24 relative to the case 25 is disposed in the second space portion 43. In the second space 43, the clutch plate 26 moves in the direction of the rotation axis along the drive shaft connecting portion 32 without rotating around the rotation axis. For this reason, a plurality of guide rail portions 47 that guide the movement of the clutch plate 26 are provided on the inner peripheral surface of the second cylindrical portion 43 </ b> A constituting the second space portion 43. The several guide rail part 47 is comprised by the protrusion part parallel to a rotating shaft direction on the internal peripheral surface of 43 A of 2nd cylindrical parts. The number of the guide rail portions 47 is not particularly limited, but here, three guide rail portions 47 are provided in parallel to each other on the inner peripheral surface of the second cylindrical portion 43A.

  The clutch plate 26 has a ring shape and includes an insertion hole 51 at the center. A guide portion 52 that engages with the guide rail portion 47 is provided on the outer peripheral surface. The guide part 52 is comprised by the recessed part, for example, and is arrange | positioned at three places corresponding to a position on the guide rail part 47. As shown in FIG. Further, the inner peripheral surface constituting the insertion hole 51 includes a protrusion 53 that engages with the cam groove 35 of the drive shaft connecting portion 32 that faces the second space portion 43. The protruding portion 53 is configured by attaching a spherical body to a concave portion provided on the inner peripheral surface of the insertion hole 51 by press-fitting or the like. By using a spherical body, the projecting portion 53 has a configuration with low friction with respect to the cam groove 35, and is easy to move in the cam groove 35. The clutch plate 26 is inserted into the second space 43 with the guide 52 aligned with the position of the guide rail 47 of the second space 43. Further, with respect to the drive shaft connecting portion 32 facing the second space portion 43 through the communication hole 44, the protruding portion 53 enters the entry groove 38 and moves to the cam groove 35.

  As shown in FIG. 9, the clutch plate 26 is non-rotatable about the rotation axis with respect to the internal gear member 24, and is attached so as to move while being guided by the guide rail portion 47 along the drive shaft connecting portion 32. It is done. Further, the carrier 23 is rotatable with respect to the internal gear member 24 until the rotation restricting portion 36 and the engaging portion 46 are engaged. The clutch plate 26 moves along the drive shaft connecting portion 32 by being guided by the guide rail portion 47 when the drive shaft connecting portion 32 of the carrier 23 rotates and the projection 53 moves in the cam groove 35.

  The surface of the clutch plate 26 opposite to the partition plate 41 is a contact surface 55 that comes into contact with the inner surface of the case 25, and the contact surface 55 is a first ratchet tooth 54 that is configured with irregularities around the insertion hole 51. It has.

  As shown in FIG. 10, the internal gear member 24 having at least the clutch plate 26 attached to the second space 43 is accommodated in the case 25. The case 25 has a rectangular parallelepiped shape and includes an accommodating portion 61 that accommodates the internal gear member 24 therein. The accommodating portion 61 has an insertion opening 63 formed in one first surface 62 of the case 25, and a through hole that exposes the drive shaft connecting portion 32 to the second surface 64 facing the first surface 62. 65 is arranged. The through hole 65 is formed in a circular shape, but the shape is not particularly limited as long as the drive shaft 14 and the drive shaft connecting portion 32 can be connected to each other, and a polygonal shape such as a rectangular shape is used. It may be.

  When the internal gear member 24 is housed in the housing portion 61, the inner surface of the second surface 64 becomes a facing surface 66 that faces the contact surface 55 of the clutch plate 26, and the facing surface 66 is a first surface around the through hole 65. A second ratchet tooth 67 composed of irregularities meshing with the ratchet teeth 54 is provided. As shown in FIG. 9, when the projection 53 is positioned in the first groove 35A, the clutch plate 26 is separated from the partition plate 41, the first ratchet teeth 54 mesh with the second ratchet teeth 67, and the case 25 is set to a locking state in which the internal gear member 24 does not rotate. At this time, the driving force transmission unit 9 functions as a planetary gear mechanism. Further, when the protrusion 53 is positioned in the second groove 35B, the clutch plate 26 is close to the partition plate 41, and the first ratchet teeth 54 and the second ratchet teeth 67 are separated to release the locked state. The rotation of the internal gear member 24 with respect to the case 25 is allowed. At this time, the driving force transmission portion 9 does not function as a planetary gear mechanism because the internal gear member 24 does not function as a fixed portion and any fixed portion for the case 25 does not exist.

  Next, the operation of the driving force transmission unit 9 configured as described above will be described. First, a case where the slat is lowered will be described. When the slat 3 is moved downward in the first direction and lowered, when the operation cord 7 is pulled in the first direction, the pulley rotates in accordance with this and the input shaft 8 is fed out in the first rotation direction. Rotate in the direction.

  Here, the driving force transmission unit 9 is in a state as shown in FIG. 11 until immediately before the operation of lowering the slat is started. That is, the protrusion 53 of the clutch plate 26 is located in the first groove 35 </ b> A of the cam groove 35. Therefore, the first ratchet teeth 54 and the second ratchet teeth 67 mesh with each other, and the internal gear member 24 is set in a locked state in which the rotation with respect to the case 25 is fixed. As shown in FIG. 7, the rotation restricting portion 36 of the carrier 23 and the engaging portion 46 of the internal gear member 24 are not engaged, and the carrier 23 is rotated when the sun gear member 21 is rotated. The internal gear member 24 is rotatable.

  In this state, when the operation cord is pulled in the first direction and the initial operation starts, the input shaft 8 rotates in the feeding direction of the slat 3, and the sun gear member 21 moves in the first rotation direction at the same speed as the input shaft 8. Rotate. Then, the carrier 23 drives the drive shaft 14 at a second speed reduced by the planetary gear member 22 with respect to the rotational speed of the sun gear member 21 in accordance with the gear ratio based on the number of teeth of the sun gear 21S and the number of teeth of the internal gear 45. Rotate. That is, the carrier 23 rotates the drive shaft 14 at a second speed slower than the first speed suitable for moving the slat 3. As shown in FIG. 12, this causes one of the warp yarns of the ladder cord 2 to fall and the other to rise, and all the slats 3 rotate in one direction to the maximum inclination angle in a decelerating state, resulting in a fully closed state that blocks solar radiation. .

  When the operation cord is further pulled in the first direction after operating as described above in the initial movement, the input shaft 8 further rotates in the first rotation direction in which the slat 3 is extended. As shown in FIG. 13, when the carrier 23 rotates in the first rotation direction at the second speed reduced, the protrusion 53 positioned in the first groove 35A is provided with the second groove 35B via the inclined part 35C. , The first ratchet teeth 54 and the second ratchet teeth 67 are separated, and the locked state is released. As a result, the locked state of the internal gear member 24 with respect to the case 25 is released, and the internal gear member 24 is allowed to rotate with respect to the case 25. As the carrier 23 continues to rotate, the rotation restricting portion 36 and the engaging portion 46 of the internal gear member 24 are engaged, and the rotation input from the input shaft 8 to the sun gear member 21 is transmitted to the carrier 23 as it is. Is done. The carrier 23 rotates integrally with the internal gear member 24 so that the engaging portion 46 is pushed in the first rotation direction by the rotation restricting portion 36. As a result, the drive shaft 14 connected to the drive shaft connecting portion 32 of the carrier 23 is not decelerated and is rotated at the same speed as the input shaft 8, that is, at the first speed suitable for moving the slat 3. The first speed is a rotational speed that is faster than the second speed of the carrier 23 in the deceleration state by the planetary gear mechanism. The slat 3 is lowered at the first speed in the fully closed state rotated to the maximum inclination angle.

  Next, a case where the slat is raised will be described. When the slat is moved upward in the second direction to be raised, first, when the operation cord is pulled in the second direction opposite to the first direction, the pulley rotates in reverse to this, and the input shaft 8 Rotates in the winding direction, which is the second rotation direction opposite to the first rotation direction. At this time, the state shown in FIG. 13 is changed to the state shown in FIG. Specifically, when the operation cord 7 is pulled in the second direction and the initial movement operation starts, the input shaft 8 starts to rotate in the second rotation direction, and the sun gear member 21 also rotates in the second rotation direction accordingly. .

  When the rotation direction is switched in this way, the load of the slat 3 is applied to the carrier 23 to which the drive shaft 14 is connected, and this load becomes the rotational resistance of the carrier 23. For this reason, when the sun gear member 21 rotates in the second rotation direction, the carrier 23 functions as a fixed portion, and the internal gear member 24 rotates reversely with respect to the rotation direction of the sun gear member 21. As a result, the protrusion 53 of the clutch plate 26 integral with the internal gear member 24 transitions from the second groove 35B to the first groove 35A via the inclined portion 35C, and the first ratchet teeth 54 are changed to the second ratchet teeth 67. Is engaged. Thus, the state shown in FIG. 11 is obtained, and the internal gear member 24 is set in a locked state with respect to the case 25. This operation occurs not only when the slat 3 is switched to the ascending operation after the descending operation but also when the slat 3 is switched to the descending operation after the ascending operation. Further, when the operation cord is pulled in the second direction, the input shaft 8 rotates in the second rotation direction. Then, the carrier 23 is decelerated by the planetary gear member 22 with respect to the rotation of the sun gear member 21, and rotates the drive shaft 14 at the second speed. Until the carrier 23 continues to rotate and the rotation restricting portion 36 of the carrier 23 and the engaging portion 46 of the internal gear member 24 engage with each other, the slat 3 is in a decelerated state, from the fully closed state shown in FIG. The slats 3 shown in FIG. 14 are reversely fully closed by rotating to the maximum inclination angle in the reverse direction through the fully open states parallel to each other.

As shown in FIG. 13, after the operation as described above is performed in the initial movement, when the operation cord is further pulled in the second direction, the protrusion 53 positioned in the first groove portion 35A again passes through the inclined portion 35C. The transition is made to the second groove 35B, the first ratchet teeth 54 are separated from the second ratchet teeth 67, and the locked state is released. Then, the internal gear member 24 is allowed to rotate with respect to the case 25. Then, the rotation restricting portion 36 and the engaging portion 46 are engaged and directly connected, and the rotation input from the input shaft 8 to the sun gear member 21 is transmitted to the carrier 23 as it is. The carrier 23 rotates integrally with the internal gear member 24 so that the engaging portion 46 is pushed in the second rotation direction by the rotation restricting portion 36. As a result, the drive shaft 14 connected to the drive shaft connecting portion 32 of the carrier 23 is not decelerated and is rotated at the first speed. The slat 3 is raised at the first speed in the reverse fully closed state rotated to the maximum inclination angle.
The horizontal blinds as described above can obtain the effects listed below.

  (1) When the slat 3 is moved up and down, in the initial movement, the slat 3 is rotated at the decelerated second speed. Therefore, it is possible to prevent the rotation failure of the slat 3 from occurring as when the slat 3 is rotated at the normal first speed suitable for the movement of the slat 3 according to the operation speed of the operation cord 7. . That is, it is possible to prevent the slats 3 from moving up and down in a state where some of the slats 3 are not fully closed or reverse fully closed. Therefore, it is not necessary for the operator to perform the lifting / lowering operation of the slat 3 again, and the operability can be improved in this respect. Moreover, it can suppress that the slat 3 with poor rotation and the slat 3 adjacent to the poor slat 3 are bent at the time of raising and lowering.

  (2) Specifically, the rotation of the internal gear member 24 relative to the case 25 can be controlled by disposing the clutch plate 26 between the case 25 and the internal gear member 24 and moving the clutch plate 26.

(3) Specifically, the rotation of the internal gear member 24 relative to the case 25 can be controlled with a simple configuration in which the first ratchet teeth 54 of the clutch plate 26 and the second ratchet teeth 67 of the case 25 are engaged.
(4) The movement of the clutch plate 26 along the drive shaft connecting portion 32 can be realized with a simple configuration in which the protrusion 53 is engaged with the cam groove 35.

  (5) A configuration in which the carrier 23 and the internal gear member 24 are directly connected and the output is the same speed with respect to the input, the carrier 23 of the planetary gear mechanism is connected to the rotation restricting portion 36 and the engaging portion 46 of the internal gear member 24 This can be realized by engaging the.

(6) When the slat 3 is moved up and down, it is not the decelerated second speed, but the first speed that is constant with respect to the rotation of the input, so that the time required for the lifting operation is prevented from becoming too long. be able to.
In addition, the horizontal blinds as described above can be implemented with appropriate modifications as follows.

  The configuration in which the carrier 23 and the internal gear member 24 are directly connected is not limited to the configuration in which the rotation restriction portion 36 and the engagement portion 46 of the internal gear member 24 are engaged with the carrier 23 described above. That is, for example, an engagement protrusion is disposed on one of the carrier 23 and the internal gear member 24, and a long hole-shaped engagement with the circumferential direction disposed on the other of the carrier 23 and the internal gear member 24 as a major axis. You may make it engage an engagement protrusion with a joint hole. In this case, the long hole-like engagement hole defines the movement range of the engagement protrusion. Also with such a configuration, the same function as when the rotation restricting portion 36 and the engaging portion 46 are engaged can be realized by the engagement protrusions coming into contact with the end portions of the engaging holes.

  The cam groove 35 may be provided on the inner peripheral surface of the clutch plate 26, and the protrusion 53 may be provided on the outer peripheral surface of the drive shaft connecting portion 32 of the carrier 23. The protrusion 53 may be a protrusion provided integrally with the inner peripheral surface of the clutch plate 26 or the outer peripheral surface of the drive shaft connecting portion 32. Further, a lubricant may be applied to the cam groove 35 and the protruding portion 53.

  A guide protrusion is disposed on the outer peripheral surface of the clutch plate 26, and a guide recess to be engaged with the guide protrusion is disposed on the inner peripheral surface of the second space 43, so that the clutch plate 26 is connected to the drive shaft connecting portion 32. You may make it move along.

  The configuration for controlling the rotation of the internal gear member 24 relative to the case 25 is not limited to the configuration in which the first ratchet teeth 54 and the second ratchet teeth 67 are engaged. For example, the contact surface on which the first ratchet teeth 54 are disposed and the facing surface of the case 25 may be a high-friction frictional resistance surface constituted by a rough surface or the like.

  -As a switching part, you may make it control rotation of the internal gear member 24 with respect to the case 25 by structures other than the clutch plate 26. FIG. For example, a configuration in which a protruding member that protrudes and protrudes in response to the rotation of the drive shaft connecting portion 32 engages with a recess formed in the facing surface 66 of the case 25 may be employed. Even with such a configuration, the internal gear member 24 can be fixed to the case 25 by the protrusion member engaging the recess.

  The period during which the slat 3 is decelerated to the second speed may include a predetermined period after the slat 3 starts to descend or rise, in addition to the period during which the slat 3 rotates. As a result, the slat 3 can be moved at the decelerated second speed for a while after the slat 3 actually starts to descend or rise. On the contrary, even when the slat 3 is rotating, the second speed may be switched to the first speed. The timing of switching from the second speed to the first speed is determined by the distance until the rotation restricting portion 36 and the engaging portion 46 are engaged, and can be appropriately set depending on the use and specifications of the horizontal type bride.

  When the rotation failure of the slat 3 does not occur, the input part is the carrier 23 and the output part is the sun gear member 21 or the internal gear member 24, thereby speeding up the input rotation in the initial movement. You can also. For example, the initial movement speed at the start of descent or ascent of the slat 3 can be made faster than the subsequent movement speed. According to the increase in the rotation speed of the slat, the rotation time of the slat 3 can be shortened and the time until the solar radiation is shielded can be shortened. Further, when the slat 3 is lifted, the rotation speed and the lifting speed of the slat can be increased in the initial movement in which the number of slats to be lifted is small and the operation force for operating the operation cord 7 is small. Next, when the number of slats to be lifted increases and the operating force increases, the torque increases instead of decreasing the speed, and the operating force can be reduced. Thereby, the operativity can be improved.

  -By inputting the sun gear member 21 as the input unit and the internal gear member 24 as the output unit, the input rotation can be reversed and output. Similarly, by inputting the internal gear member 24 as the input portion and the sun gear member 21 as the output portion, the input rotation can be reversed and output. In this case, when the slat 3 is lowered, in the initial movement, the slat 3 can be lowered after the slat 3 is turned to the reverse fully closed state. When the slat 3 is raised, the slat 3 can be raised after the slat 3 is turned to the fully closed state in the initial movement.

  The operation member that performs the raising / lowering operation of the slat 3 is not limited to the operation cord 7, and may be a pole that is connected to the gear box 12 and is suspended at substantially the same position as the operation cord.

  The configuration of the driving force transmission unit 9 can be used not only as a horizontal blind but also as a driving force transmission unit when moving a slat of a vertical blind. Even when applied to a vertical blind, occurrence of poor rotation of the slat can be suppressed, and the slat can be moved in the moving direction while the slat is rotated. Furthermore, it can also be used for a screen lifting mechanism in a roll screen. When applied to a roll screen, the initial movement when the screen is lowered or raised can be decelerated and the movement can be changed.

  DESCRIPTION OF SYMBOLS 1 ... Head box, 2 ... Ladder cord, 3 ... Slat, 4 ... Bottom rail, 5 ... Elevating cord, 6 ... Pulley case, 7 ... Operation cord, 8 ... Input shaft, 9 ... Driving force transmission part, 10 ... Mounting bracket 11 ... Winding shaft, 12 ... Gear box, 13 ... Brake drum, 14 ... Drive shaft, 21 ... Sun gear member, 21B ... Base, 21C ... Input shaft connecting portion, 21S ... Sun gear, 22 ... Planetary gear member, 23S ... Rotary shaft, 22P ... Planet gear, 23 ... Carrier, 24 ... Internal gear member, 25 ... Case, 26 ... Clutch plate, 31 ... Gear arrangement part, 32 ... Drive shaft connection part, 33 ... Gear support part, 33A ... 1st flat plate, 33B ... 2nd flat plate, 34 ... opening part, 35 ... cam groove, 35A ... 1st groove part, 35B ... 2nd groove part, 35C ... inclined part, 36 ... rotation control part, 37 ... exposure hole, 38 ... Access groove, 4 ... partition plate, 42 ... first space part, 42A ... first cylindrical part, 43 ... second space part, 43A ... second cylindrical part, 44 ... communication hole, 45 ... internal gear, 46 ... engagement part, 47 ... Guide rail part 51 ... Insertion hole 52 ... Guide part 53 ... Protrusion part 54 ... First ratchet tooth 55 ... Contact surface 61 ... Accommodating part 62 ... First surface 63 ... Insertion opening part 64 ... 2nd surface, 65 ... through-hole, 66 ... facing surface, 67 ... 2nd ratchet tooth.

Claims (6)

An input shaft that is rotated by operation of an operation unit that operates movement of the solar radiation shielding member;
A drive shaft for outputting a force for moving the solar radiation shielding member;
A driving force transmission unit that transmits rotation of the input shaft to the drive shaft between the input shaft and the drive shaft;
The driving force transmission unit is
A sun gear member;
A planetary gear member located around the sun gear member and meshing with the sun gear member;
A carrier configured to support the planetary gear member so as to rotate and revolve with respect to the sun gear member, and to revolve with the revolution of the planetary gear member;
An internal gear member that is located outside the planetary gear member and meshes with the planetary gear member;
A case for rotatably accommodating the internal gear member,
Any one of the sun gear member, the carrier, and the internal gear member is an input unit connected to the input shaft, and one other than the input unit is an output unit connected to the drive shaft. And the remaining one is a fixed part having a locked state that is not rotated with respect to the case,
The fixing unit further includes a switching unit that sets the locked state in the initial movement in the rotation of the input shaft and switches the locked state to the released state after the initial movement.
In the locked state, the output unit is rotated according to a gear ratio based on the number of teeth of the sun gear member and the number of teeth of the internal gear member,
A driving force transmission device for a solar radiation shielding device that rotates the output unit at a rotation speed different from the rotation in accordance with the transmission gear ratio when the locking state is released. The input part is the sun gear member, the output part is the carrier, and the fixed part is the internal gear member;
The switching unit is a clutch plate that controls rotation of the internal gear member with respect to the case between the case and the internal gear member,
When the clutch plate sets the internal gear member in the locked state, the carrier rotates the drive shaft by decelerating the rotation input to the sun gear member,
When the clutch plate releases the locking state of the internal gear member, the carrier and the internal gear member are directly connected, and the carrier is driven at the same speed as the rotation input to the sun gear member. The driving force transmission device for a solar radiation shielding device according to claim 1, wherein the shaft rotates. The clutch plate is disposed between the internal gear member and the case so as not to rotate with respect to the internal gear member on the internal gear member, and includes a contact surface that contacts the inner surface of the case.
The case includes a facing surface facing the contact surface on the inner surface,
The clutch plate sets the internal gear member to the locked state when the contact surface is in contact with the facing surface,
The driving force transmission device for a solar radiation shielding device according to claim 2, wherein the locking state of the internal gear member is released when the contact surface is separated from the facing surface. The carrier includes a shaft connecting portion to which the drive shaft is connected,
The clutch plate is provided with an insertion hole in the center,
The shaft connecting portion is inserted through the insertion hole of the clutch plate,
Either one of the outer peripheral surface of the shaft connecting portion and the inner peripheral surface of the insertion hole has a protrusion,
The other without the projection has a cam groove with which the projection engages,
The cam groove is a first groove portion that sets the internal gear member in the locked state, and a second groove portion that is continuous with the first groove portion, the contact surface being separated from the facing surface, and the internal gear member The driving force transmission device for a solar radiation shielding device according to claim 3, further comprising: the second groove portion that releases the locked state. The carrier has a rotation restricting portion that restricts rotation with respect to the internal gear member,
The internal gear member has an engaging portion that engages with the rotation restricting portion,
The driving force transmission of the solar radiation shielding device according to claim 2, wherein the carrier and the internal gear member are directly connected when the rotation restricting portion and the engaging portion are engaged. apparatus. In the initial movement until the rotation restricting portion and the engaging portion are engaged, the clutch plate sets the internal gear member to the locked state, and the carrier is input to the sun gear member. Rotate the drive shaft by decelerating the rotation
Following the initial movement, the carrier rotates, the clutch plate releases the locking state of the internal gear member, and the rotation restricting portion and the engaging portion are engaged to form the carrier and the internal gear. The driving force transmission device of the solar radiation shielding device according to claim 5, wherein when the member is directly connected, the carrier rotates the drive shaft at the same speed as the rotation input to the sun gear member.

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