JP6076689B2 - Rotation lock device - Google Patents

Description

  The present invention relates to a rotation lock device that locks the rotation of a winding shaft around which a long winding member such as a shutter slat, a roll blind, or a sheet is wound.

  In a winding device such as a roll blind, a coil spring is used as a clutch spring for locking the rotation of the winding shaft, and the winding member is moved to an arbitrary position by a frictional force generated by reducing or expanding the diameter of the coil spring ( A rotation lock device having a structure of stopping at a height is conventionally used (see, for example, Patent Documents 1 to 3).

  A conventional rotation lock device uses a clutch spring made of a coil spring with respect to a take-up spring that rotates a take-up shaft in the take-up direction of a take-up member such as a screen. It has a structure that allows or locks the winding rotation of the winding shaft. In this rotation lock device, a heart cam having a plurality of locking grooves is formed on the outer periphery of a fixed shaft that rotatably supports the winding shaft. The heart cam has a plurality of engagement grooves for moving the engagement end on one end side of the clutch spring in an engaged state. The plurality of locking grooves are formed to lock the drawn screen at an arbitrary position and to slightly pull out the drawn-up winding member to reduce the diameter of the clutch spring and unlock the clutch spring. ing.

JP 2006-161413 A JP 2005-299273 A JP-A-7-279560

  In the conventional rotation lock device, the drawn-up winding member can be stopped at an arbitrary position. Further, when the winding member is slightly pulled out at the stopped position once pulled out, the clutch spring is unlocked, so that the winding member is wound up. In such a structure, when the winding member once pulled out is repeatedly pulled out, the lock is released and the winding member is wound up. For this reason, the conventional rotation lock device has a problem that after the take-up member has been pulled out, the take-up member cannot be pulled out further, and the take-out of the take-up member cannot be adjusted steplessly. Yes.

  The present invention has been made in consideration of such conventional problems, and in addition to being able to wind the winding member by releasing the lock of the winding member that is stopped in the pulled-out state. Another object of the present invention is to provide a rotation lock device that can lock the winding direction even when the winding member stopped at an arbitrary position is repeatedly pulled out, and that can adjust the drawing steplessly.

  The rotation lock device of the present invention is a rotation lock device that locks the rotation of a winding shaft around which a winding member is wound and rotatably supported by a fixed shaft in the winding direction by the urging force of the winding spring. One way provided between the take-up shaft and the fixed shaft, allowing the take-up shaft to rotate in the pull-out direction of the take-up member and switching the lock of the take-up shaft in the take-up direction. A clutch mechanism, a lock release member that is slidable in the axial direction of the fixed shaft, and that switches the one-way clutch mechanism by the slide, and is attached to the fixed shaft so as to be detachable from the lock release member. A lock plate that locks the slide of the unlocking member by engagement with the unlocking member to hold the one-way clutch mechanism in a rotation-permitted state of the take-up shaft; Wherein the and an operating member for sliding the lock release member to the one-way clutch mechanism and the rotation allowing state of the winding shaft.

In this case, the one-way clutch mechanism includes a take-up shaft side ratchet tooth provided on the take-up shaft side and a fixed shaft side provided on the fixed shaft side and detachably engaged with the take-up shaft side ratchet tooth. A ratchet tooth and a ratchet forming surface of the take-up shaft side ratchet tooth or a ratchet forming surface of the fixed shaft side ratchet tooth are provided so as to be able to project and retract. Preferably, it is formed by an extrusion cam mechanism that contacts the ratchet forming surface and maintains a distance from the other ratchet forming surface.
The ratchet forming surface of the winding shaft side ratchet teeth and the ratchet forming surface of the fixed shaft side ratchet teeth are provided with a guide mechanism that can be engaged with each other when the winding shaft rotates in the winding direction, It is preferable that the winding shaft and the fixed shaft are brought close to each other by engagement of the guide mechanism to guide the ratchet teeth into meshing.
Further, the push cam mechanism is rotatably provided on any one of the ratchet forming surfaces, and the push cam moves in and out with respect to the ratchet forming surface by the turn, and the push cam protrudes from the ratchet forming surface. It is preferably formed by an extrusion spring that urges the extrusion cam to rotate.
Further, the guide mechanism includes a guide convex portion formed on the outer peripheral side of the ratchet forming region of one ratchet forming surface so as to be higher than the ratchet teeth, and the other ratchet that can be engaged with the guide convex portion. It is preferable to include a guide recess formed on the outer peripheral side of the forming surface.
The one-way clutch mechanism includes a take-up shaft side ratchet provided on the take-up shaft side and a fixed shaft-side ratchet that is provided on the fixed shaft side and is detachably engaged with the take-up shaft side ratchet teeth. Preferably, it is formed by teeth.
Further, when the take-up shaft rotates in the take-up direction, the lock plate does not act on the lock plate but acts so that the lock plate is disengaged from the engagement with the unlocking member when rotated in the pull-out direction. It is preferable that an inversion piece is provided on the winding shaft.

  According to the present invention, even if the winding member stopped at an arbitrary position is further pulled out, the one-way clutch mechanism locks the rotation of the winding shaft in the winding direction. It is not wound up. Therefore, since the winding member can be further pulled out from an arbitrary pulling position, the drawing-out of the winding member can be adjusted steplessly.

  Further, according to the present invention, the lock of the one-way clutch mechanism is released by sliding the lock release member with the operation member and engaging the lock plate, and the winding shaft is rotated in the winding direction by the winding spring. . For this reason, a winding member can be wound up at a stretch.

It is a partial fracture front view showing the rotation lock device of a 1st embodiment of the present invention. It is the sectional view on the AA line of FIG. 4 which shows the state which incorporated the rotation lock apparatus in the winding device. It is a partially broken rear view which shows a rotation lock apparatus. It is a right view of a rotation lock device. A rotating shaft is shown, (A) is a longitudinal cross-sectional view, (B) is a side view, (C) is a partially broken front view. It is a side view of a movable shaft. A movable axis is shown, (A) is a longitudinal section, (B) is a side view, and (C) is a front view. It is a front view which shows the locked state which pulled out the winding member completely. It is sectional drawing which shows the locked state which pulled out the winding member completely. It is a rear view which shows the locked state which pulled out the winding member completely. It is the elements on larger scale of FIG. It is a front view which shows the state which pulls out a winding member. It is sectional drawing which shows the state which pulls out a winding member. It is a rear view which shows the state which pulls out a winding member. It is the elements on larger scale of FIG. It is a front view which shows the state which stopped drawing-out of the winding member. It is sectional drawing which shows the state which stopped drawing-out of the winding member. It is a rear view which shows the state which stopped drawing-out of the winding member. It is the elements on larger scale of FIG. It is a front view which shows the state which pulled out the winding member from the temporary stop state. It is sectional drawing which shows the state which pulled out the winding member from the temporary stop state. It is a rear view which shows the state which pulled out the winding member from the temporary stop state. It is the elements on larger scale of FIG. It is a partially broken front view which shows the rotation lock apparatus of 2nd Embodiment of this invention. It is sectional drawing which shows the state which incorporated the rotation locking device of 2nd Embodiment in the winding device. It is a partially broken rear view which shows the rotation lock apparatus of 2nd Embodiment. It is a right view of the rotation lock apparatus of 2nd Embodiment. It is a partially broken front view which shows the rotation lock apparatus of 3rd Embodiment of this invention. It is sectional drawing which shows the state which incorporated the rotation locking device of 3rd Embodiment in the winding device. It is a partially broken rear view which shows the rotation lock apparatus of 3rd Embodiment. It is a right view of the rotation lock apparatus of 3rd Embodiment. It is a rear view which shows the case where an extrusion cam mechanism is provided in the rotating shaft side. It is the elements on larger scale of FIG.

  Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. 1 to 23 show a rotation lock device 1 according to a first embodiment of the present invention. As shown in FIGS. 1 and 2, the rotation lock device 1 is incorporated in a winding device 2 that winds a long winding member 3 such as a shutter slat, a roll blind, or a sheet.

  The winding device 2 has a fixed shaft 4, a winding shaft 5, and a winding spring 6 as shown in FIGS. 1 to 4. Both ends of the fixed shaft 4 are fixed to the wall surface of the building, and the winding shaft 5 is rotatably supported by passing through the winding shaft 5. The winding shaft 5 is formed in a horizontally long cylindrical shape through which the fixed shaft 4 passes. A long winding member 3 such as a blind or a slat is wound around the outer peripheral surface of the winding shaft 5, and the winding shaft 5 rotates on the winding shaft 5 in the winding direction (α direction in FIG. 4). On the other hand, it is pulled out from the winding shaft 5 by the rotation of the winding shaft 5 in the pulling direction (β direction in FIG. 4). Rotating shafts 7 and 11 that are constituent members of the winding shaft 5 are fixed inside at both ends in the length direction of the winding shaft 5. Here, the rotating shaft 7 is fixed to the winding shaft 5 by fitting, and the rotating shaft 11 is fixed to the winding shaft 5 by screwing. The fixed shaft 4 penetrates so as to contact the inner surfaces of the rotary shafts 7 and 11, so that the take-up shaft 5 is supported by the fixed shaft 4 so as to be rotatable in forward and reverse directions (α and β directions in FIG. 4). Is done. The left and right rotating shafts 7 and 11 rotate integrally with the rotation of the winding shaft 5 in the forward and reverse directions. The rotation lock device 1 according to this embodiment is provided on a rotation shaft 11 on one side (right side) at both ends of the winding shaft 5.

  A coil spring is used as the take-up spring 6 and is disposed inside the cylindrical take-up shaft 5 with the fixed shaft 4 penetrating therethrough. The winding spring 6 has a hook portion 6 a on one end side locked to the fixed shaft 4 and a hook portion 6 b on the other end side locked to the rotating shaft 7. Accordingly, when the winding shaft 5 rotates in the pulling direction (β direction) by pulling out the winding member 3, a spring force is accumulated in the winding spring 6, and the spring force causes the winding shaft 5 to wind in the winding direction (α Acting to rotate in the direction).

  The rotation lock device 1 is disposed on the rotation shaft 11 side which is a constituent member of the winding shaft 5, and includes a one-way clutch mechanism 31, a lock release member 13, a lock plate 15, and an operation member 17. Yes.

  The rotary shaft 11 is formed by a shaft main body 11 a and a cylindrical body portion 11 b that extends integrally from the shaft main body 11 a in the axial direction (right direction) of the winding shaft 5, and the whole rotates integrally with the winding shaft 5. The shaft body portion 11a is fixed to one end portion (right end portion) of the winding shaft 5 by screwing, and the fixed shaft 4 passes through the inside. The cylindrical portion 11b is formed in a cylindrical shape extending from one end side of the shaft main body 11a to the outside in the axial direction. A fixed piece 21, a lock plate 12, and an unlocking member 13 are arranged inside the cylindrical body portion 11b. A reversing piece 19 is attached to the inner surface of the cylindrical portion 11b.

  The fixed piece 21 extends along the length direction of the fixed shaft 4 and is fixed to the outside of the fixed shaft 4 by a fixed screw 22 penetrating the fixed piece 21 and the fixed shaft 4. The fixed piece 21 constitutes a part of the fixed shaft 4. A movable shaft 33 constituting a part of the fixed shaft 4 is disposed on the outer surface of the fixed piece 21, and the one-way clutch mechanism 31 is provided on the movable shaft 33 and the rotating shaft 11.

  The one-way clutch mechanism 31 is provided on the movable shaft 33, the winding shaft side ratchet teeth 32 formed on the rotating shaft 11 (winding shaft 5), the fixed shaft side ratchet teeth 34 formed on the opposed surface of the movable shaft 33, and the movable shaft 33. Formed by the extruded cam mechanism 41.

  FIG. 5 shows the rotating shaft 11, and the surface facing the movable shaft 33 is a ratchet forming surface 11 c, and the winding shaft side ratchet teeth 32 are formed on the ratchet forming surface 11 c. The take-up shaft side ratchet teeth 32 are provided in an annular shape around the center of the rotating shaft 11. The outer peripheral side of the annular winding shaft side ratchet teeth 33 is a ring-shaped flat surface, and this flat surface is a contact surface 11 d with which the push cam 42 of the push cam mechanism 41 abuts.

  The movable shaft 33 is attached to the fixed piece 21 so as to face the shaft main body 11 a of the rotating shaft 11. The movable shaft 33 is urged by a push spring 39 so as to move in the direction of the shaft body 11 a of the rotating shaft 11, and the fixed shaft side ratchet teeth 34 wind the rotating shaft 11 by moving forward in the rotating shaft 11 direction. The shaft side ratchet teeth 32 are engaged with each other. In addition, the fixed shaft side ratchet teeth 34 are disengaged from the meshing with the take-up shaft side ratchet teeth 32 by the backward movement of the movable shaft 33.

  6 and 7 show the movable shaft 33. The surface of the rotating shaft 11 facing the shaft main body 11a is a ratchet forming surface 33c, and the fixed shaft side ratchet teeth 34 are annular on the ratchet forming surface 33c. Is provided. A mounting hole 33 d of the push cam mechanism 41 is formed on the outer peripheral side of the annular fixed shaft side ratchet teeth 34. The mounting hole 33d is formed at a position equally divided into four in the circumferential direction of the movable shaft 33. A through hole 33 a through which the fixed shaft 4 passes is formed in the central portion of the movable shaft 33. A plurality of rotation restricting recesses 33b extending in the axial direction are formed in the outer peripheral portion of the through hole 33a, and a rotation restricting rib 21b (see FIG. 2) formed on the outer peripheral surface of the fixed piece 21 is fitted into the rotation restricting recess 33b. It comes to include. Thereby, the movable shaft 33 moves along the axial direction of the fixed shaft 4 in a state where the rotation is restricted.

The push cam mechanism 41 is attached to each of the attachment holes 33 d of the movable shaft 33. As shown in FIGS. 11, 15, 19, and 23, each push-out cam mechanism 41 includes a push-out cam 42 and a rotation center shaft of the rotary shaft 11 with respect to the pull-out direction of the take-up member 3. And a pressing spring 43 that urges the rotation counterclockwise (the X direction shown in FIG. 11). Such a pressing spring 43 is urged to rotate so that the push-out cam 42 protrudes from the ratchet forming surface 33 c of the fixed shaft side ratchet tooth 34 in the movable shaft 33. In this embodiment, a torsion spring is used as the pushing spring 43, but a plate spring or other springs can be used as long as the pushing cam 42 is urged to rotate in the X direction described above. .
The push cam 42 is formed by a mounting portion 42a and a cam portion 42b provided integrally with the mounting portion 42a. The attachment portion 42a is rotatably attached to an attachment pin 33e formed in the attachment hole 33d of the movable shaft 33. The cam portion 42b extends from the mounting portion 42a in the direction of the ratchet forming surface 33c, and can be projected and retracted with respect to the ratchet forming surface 33c by rotating the push cam 42 in the forward and reverse directions. The pushing cam 42 is restricted from further pivoting in the protruding direction by the side surface portion 42c of the cam portion 42b coming into contact with the end surface 33g of the mounting hole 33d. As shown in FIG. 11, the cam portion 42b has a ratchet forming surface 33c. It stops in a state following the direction orthogonal to the direction, that is, the axial direction of the rotary shaft 11, and is in a maximum protruding state. The protruding height L in the maximum protruding state is set to be equal to or higher than the height M of the take-up shaft side ratchet teeth 32 and the fixed shaft side ratchet teeth 34 (L> M). In this state, the cam portion 42b contacts the contact surface 11d of the rotating shaft 11 (see FIG. 15), so that the shaft body 11a of the rotating shaft 11 and the movable shaft 33 act so as to maintain a certain distance. The winding shaft side ratchet teeth 32 and the fixed shaft side ratchet teeth 34 are prevented from contacting each other.

  As shown in FIGS. 1 to 4, the lock release member 13 is provided on the outer surface of the fixed piece 21 (fixed shaft 4), and the lock plate 15 is attached to the lock release member 13.

  The unlocking member 13 has a horizontally long shape along the axial direction of the fixed piece 21 (fixed shaft 4), and is slidable along the axial direction of the fixed shaft 4. A locking piece 13a is formed at the end of the unlocking member 13 opposite to the movable shaft 33, and an operation member 17 such as a rope is locked to the locking piece 13a. Accordingly, by pulling the operation member 17, the lock release member 13 slides along the fixed shaft 4 in a direction away from the shaft body 11 a of the rotating shaft 11 (right direction). Further, the lock release member 13 and the movable shaft 33 are connected by the connection pin portion 33 f of the movable shaft 33 penetrating the movable release shaft 13 side of the lock release member 13. Therefore, when the unlocking member 13 moves in the right direction, the movable shaft 33 moves in the same direction. On the other hand, when the movable shaft 33 moves in the direction (left direction) of the shaft body 11a of the rotating shaft 11, the lock release member 13 slides in the same direction. A lock hole 13b with which the lock plate 15 is engaged is formed in an intermediate portion of the lock release member 13 in the length direction.

  The lock plate 15 is attached to the lock release member 13 by a connecting pin 18 penetrating the fixed piece 21 and the lock release member 13. The connecting pin 18 passes through an intermediate portion in the length direction of the lock plate 15, and the lock plate 15 is attached to the lock release member 13 in an oblique standing state in which an end portion on the opposite side to the movable shaft 33 is raised. The lock plate 15 can swing with respect to the lock release member 13. A push-up spring 16 made of a leaf spring is provided between the lock plate 15 and the lock release member 13, and the lock plate 15 is held in the above-described oblique standing state by the elastic force of the push-up spring 16. Further, on the movable shaft 33 side (left end side) of the lock plate 15, a lock claw 15 a that is removably inserted into the lock hole 13 b of the lock release member 13 is formed. By inserting the lock claw 15a into the lock hole 13b, the lock plate 15 and the lock release member 13 are engaged. By this engagement, the slide of the unlocking member 13 is locked.

  The reversing piece 19 is attached to the inner surface of the cylindrical portion 11 b (winding shaft 5) of the rotating shaft 11 so as to correspond to the right end portion of the lock plate 15. The reversing piece 19 is rotatably attached to the inner surface of the cylindrical body portion 11b, and comes into contact with the right end portion of the lock plate 15, that is, the top portion of the lock plate 15 that is inclined obliquely as the rotating shaft 11 rotates. In this case, the reversing piece 19 is urged to rotate in the pulling-out direction (β direction in FIG. 4) of the winding shaft 5 (rotating shaft 11) by a return spring 23 made of a torsion spring. When the reversing piece 19 rotates in the winding direction (α direction) of the rotating shaft 11 (winding shaft 5), the reversing piece 19 escapes even if the reversing piece 19 contacts the right end of the lock plate 15. However, when the rotary shaft 11 rotates in the pulling direction (β direction) and comes into contact with the right end of the lock plate 15, the reversing piece 19 moves to the lock plate 15. It works to push the right end of the. As a result, the lock plate 15 swings so that the lock claw 15a is disengaged from the lock hole 13b of the lock release member 13, and the engagement between the lock plate 15 and the lock release member 13 is released.

  In addition to the above, in this embodiment, the guide mechanism 51 that guides the take-up shaft side ratchet teeth 32 and the fixed shaft side ratchet teeth 34 to mesh with each other includes the rotating shaft 11 (winding shaft 5) and the movable shaft 33. (Fixed shaft 4). The guide mechanism 51 is formed by a guide convex portion 52 and a guide concave portion 53.

  As shown in FIG. 7, the guide convex portion 52 is formed on the ratchet forming surface 33c of the movable shaft 33, and is formed so as to rise at a predetermined interval at the four outermost positions of the ratchet forming surface 33c. ing. The guide protrusion 52 is formed to be higher than the fixed shaft side ratchet teeth 34. As shown in FIG. 5, a plurality of guide recesses 53 are formed on the outermost peripheral side of the ratchet forming surface 11 c in the rotating shaft 11. The guide recess 53 is engaged with the guide protrusion 52. The guide convex portion 52 and the guide concave portion 53 are inclined with respect to the rotation direction of the rotary shaft 11, thereby enabling the guide convex portion 52 to smoothly enter the guide concave portion 53 and from the guide concave portion 53. The guide convex portion 52 can be smoothly detached. The guide convex portion 52 and the guide concave portion 53 engage with each other when the rotary shaft 11 (winding shaft 5) rotates in the winding direction. As the guide convex portion 52 and the guide concave portion 53 are engaged with each other in this way, the movable shaft 33 is drawn close to the rotating shaft 11 and the winding shaft side ratchet teeth 32 and the fixed shaft side ratchet teeth 34 are mutually connected. To mesh. Further, since the guide convex portion 52 is formed to be higher than the fixed shaft side ratchet teeth 34, the retracting of the movable shaft 33 causes the winding shaft side ratchet teeth 32 and the fixed shaft side ratchet teeth 34 to mesh. Come off.

  Next, the operation of the rotation lock device 1 will be described. FIGS. 8-11 shows the state which the winding member 3 was wound up fully open. In this state, the operation member 17 is moved in the right direction, and as a result, the unlocking member 13 is slid in the right direction with respect to the fixed shaft 4, so that the movable shaft 33 is moved in the same direction. Since it is separated from the rotating shaft 11, the fixed shaft side ratchet teeth 34 are disengaged from the winding shaft side ratchet teeth 32. At the same time, the lock plate 15 whose right end is pushed up by the push-up spring 16 is engaged with the lock claw 15a entering the lock hole 13b of the lock release member 13, so that the movable shaft 33 returns to the rotary shaft 11 side. This prevents the lock plate 15 from being engaged with the unlocking member 13. When the ratchet teeth 32 and 34 are disengaged, the rotary shaft 11 rotates in the winding direction (α direction) by the urging force of the winding spring 6, so that the winding member 3 is wound around the winding shaft 5 at a stretch. Fully open. At this time, as shown in FIGS. 10 and 11, the push cam 42 of the push cam mechanism 41 is rotated in the pull-out direction of the take-up member 3 by the urging force of the push spring 43, and the rotary movable shaft 33 is moved. It is in a state of protruding from the ratchet forming surface 33c to the rotating shaft 11 side.

  12 to 15 show a state in which the winding member 3 is pulled out from the fully opened state of the winding member 3 in FIGS. 8 to 11. By rotating the winding member 3, the rotating shaft 11 rotates in the pulling direction (β direction), and the reversing piece 19 attached to the cylindrical body portion 11 b of the rotating shaft 11 presses the right end portion of the lock plate 15. As a result, the lock plate 15 swings in the illustrated clockwise direction against the push-up spring 16 and the lock claw 15 a is released from the lock hole 13 b of the lock release member 13. As a result, the movable shaft 33 moves in the direction of the rotating shaft 11 by the biasing force of the push spring 39. At the same time, the push cam 42 of the push cam mechanism 41 is rotated by the urging force of the push spring 43, and the cam portion 42b protrudes and comes into contact with the contact surface 11d of the rotary shaft 11 (FIGS. 14 and 15). As a result, the pushing cam 42 keeps the movable shaft 33 and the rotary shaft 11 apart from each other, so that the fixed ratchet teeth 34 of the movable shaft 33 and the take-up shaft side ratchet teeth 33 of the rotary shaft 11 contact each other. To prevent. Therefore, the winding member 3 can be gently pulled out without generating a collision sound of the ratchet teeth 32 and 34 when the winding member 3 is pulled out.

  16 to 19 show a state in which the drawing of the winding member 3 is stopped while the winding member 3 is being pulled out. In the previous stage of this state, as shown in FIGS. 12 to 15, the ratchet teeth 32, 34 are not engaged with each other, so that the collision sound of the ratchet teeth 32, 34 is not generated, and the winding member 3 is gently moved. Although it can be pulled out, once the winding member 3 is stopped in the middle, the rotating shaft 11 is rotated in the winding direction (α direction) by the urging force of the winding spring 6. At this time, since the movable shaft 33 is pushed in the direction of the rotating shaft 11 by the push spring 39, the pushing cam 42 rising to the contact surface 11d side and contacting the contact surface 11d is caused by this pressing force. The pushing spring 43 is retracted with respect to the rotation in the winding direction (α direction) while being bent, and enters the movable shaft 33. When the pushing spring 43 is bent, the spring 43 accumulates a restoring force that rotates the pushing cam 42 in the protruding direction.

By the retraction operation of the pressing cam 42, the movable shaft 33 and the rotary shaft 11 approach each other, and the guide convex portion 52 of the movable shaft 33 enters and engages with the guide concave portion 53 of the rotary shaft 11, and at the same time, the winding shaft side ratchet. The teeth 32 and the fixed shaft side ratchet teeth 34 mesh smoothly. The meshing of the ratchet teeth 32 and 34 locks the rotation of the rotating shaft 11 in the winding direction (α direction), and the rotation of the winding shaft 5 in the winding direction is stopped, so that the winding member 3 is wound. Stop. Thereby, the winding member 3 can be temporarily stopped at an arbitrary pulling position.

  20 to 23 show a state in which the take-up of the winding member 3 is started with respect to a temporarily stopped state of the winding member 3 at an arbitrary position in FIGS. When the winding member 3 is pulled out, the rotating shaft 11 rotates in the pulling direction (β direction). Since the guide recess 53 of the rotary shaft 11 is formed in a shape that separates from the guide protrusion 52 of the movable shaft 33 with respect to the β direction, it follows the shape of the movable shaft 33 while moving forward and backward in the horizontal direction in the figure. Repeat engagement and disengagement. With this operation, the engagement between the winding shaft side ratchet teeth 32 and the fixed shaft side ratchet teeth 3 is repeatedly engaged and disengaged. At this time, the pushing cam 42 is rotated by the urging force of the pushing spring 43 that stores the spring force, and the cam portion 42b is rotated while repeating protrusion and retraction of the movable shaft 33 from the ratchet forming surface 33c. It contacts the contact surface 11d of the shaft 11. As described above, since the winding member 3 can be further pulled out while the winding member 3 is temporarily stopped, the drawing-out of the winding member 3 can be adjusted steplessly.

  In addition, in this rotation lock device 1, when the winding member 3 is fully pulled out and is fully closed, the lock is released as shown in FIGS. When winding the winding member 3 from this fully closed state, it is possible to pull the operating member 17 as shown in FIGS. 8 to 11, whereby the winding member 3 can be wound all at once.

  24 to 27 show a rotation lock device 1A according to a second embodiment of the present invention. In the rotation lock device 1A, as in the first embodiment, the one-way clutch mechanism 31 includes a take-up shaft side ratchet tooth 32 formed on the rotary shaft 11, and a fixed shaft side ratchet tooth 34 formed on the movable shaft 33. It is formed by a pressing cam mechanism 41 provided on the movable shaft 33. In the rotation lock device 1 </ b> A, the rotating shaft 11 and the movable shaft 33 are not formed with the guide mechanism 51 including the guide convex portion 52 and the guide concave portion 53. Other structures are the same as those of the rotation lock device 1 of the first embodiment shown in FIGS. 1 to 23, and the same members are assigned the same reference numerals and correspond to each other.

Even when the guide mechanism 51 is not provided as described above, the one-way clutch mechanism 31 is formed by the engagement of the winding shaft side ratchet teeth 32 of the rotating shaft 11 and the fixed shaft side ratchet teeth 34 of the movable shaft 33. Locks the rotation of the take-up shaft 5 in the take-up direction, so that the drawn-up take-up member 3 is not taken up by the take-up shaft, and the take-up member 3 can be further pulled out from an arbitrary pull-out position. The drawer of the winding member 3 can be adjusted steplessly. Further, the lock member 15 is slid by the operating member 17 and engaged with the lock plate 15 to unlock the one-way clutch mechanism 31 and the winding shaft 5 rotates in the winding direction. 3 can be wound at a stretch.

  FIGS. 28-31 shows the rotation lock apparatus 1B of 3rd Embodiment of this invention. In the rotation lock device 1B, the one-way clutch mechanism 31 is formed by a winding shaft side ratchet tooth 32 formed on the rotating shaft 11 and a fixed shaft side ratchet tooth 34 formed on the movable shaft 33. The push cam mechanism 41 in the rotation lock device 1 is omitted. Further, the rotating shaft 11 and the movable shaft 33 are not formed with the guide mechanism 51 including the guide convex portion 52 and the guide concave portion 53. Other structures are the same as those of the rotation lock device 1 of the first embodiment shown in FIGS. 1 to 23, and the same members are assigned the same reference numerals and correspond to each other.

Even if the push cam mechanism 41 and the guide mechanism 51 are omitted, the one-way clutch mechanism 31 rotates the take-up shaft 5 in the take-up direction, similarly to the rotation lock device 1 of the first embodiment. In order to lock, the drawn-up winding member 3 is not wound on the winding shaft, and the winding member 3 can be further pulled out from an arbitrary drawing position, and the drawing-out of the winding member 3 is adjusted steplessly. be able to. Further, the lock member 15 is slid by the operating member 17 and engaged with the lock plate 15 to unlock the one-way clutch mechanism 31 and the winding shaft 5 rotates in the winding direction. 3 can be wound at a stretch.

  The present invention is not limited to the above embodiments, and various modifications can be made. In the above embodiment, the push cam mechanism 41 is provided on the movable shaft 33 (fixed shaft 4). However, the push cam mechanism 41 may be provided on the rotary shaft 11 side, or may be provided on both the movable shaft 33 and the rotary shaft 11.

  32 and 33 show a case where the push cam mechanism 41 is provided on the rotating shaft 11 (winding shaft 5) side. The push-out cam mechanism 41 is a push-out cam 42 rotatably attached to a mounting pin 11f formed on the shaft main body 11a of the rotary shaft 11, and a push-out push that pushes the push-out cam 42 counterclockwise (X direction). And a spring 43 for use. That is, the pushing spring 43 urges the pushing cam 42 so that the cam portion 42 b protrudes from the ratchet forming surface 11 c of the rotating shaft 11. By setting the protruding height L of the cam portion 42b in the maximum protruding state to be equal to or higher than the height M of the take-up shaft side ratchet teeth 32 and the fixed shaft side ratchet teeth 34, the push-out cam mechanism 41 can rotate the rotating shaft. 11 shaft main bodies 11a and the movable shaft 33 act so as to maintain a certain distance.

  The guide convex portion 52 of the guide mechanism 51 is formed on the movable shaft 33 and the guide concave portion 53 is formed on the rotary shaft 11. However, in the present invention, the guide convex portion 52 of the guide mechanism 51 is formed on the rotary shaft 11. The guide recess 53 may be formed on the ratchet forming surface 33 c of the movable shaft 33 while being formed on the ratchet forming surface 11 c of the shaft body 11 a. Further, the guide convex portion 52 may be formed on both the movable shaft 33 and the shaft main body 11a of the rotary shaft 11, and the guide concave portion 53 may be formed on both the movable shaft 33 and the shaft main body 11a of the rotary shaft 11.

DESCRIPTION OF SYMBOLS 1, 1A, 1B Rotation lock device 3 Winding member 4 Fixed shaft 5 Winding shaft 6 Winding spring 7 Rotating shaft 11 Rotating shaft 11c Ratchet formation surface 13 Lock release member 15 Lock plate 16 Push-up spring 17 Operation member 19 Reversing piece 21 Fixed piece 23 Return spring 31 One-way clutch mechanism 32 Take-up shaft side ratchet teeth 33 Movable shaft 34 Fixed shaft side ratchet teeth 39 Push spring 41 Extrusion cam mechanism 42 Extrusion cam 43 Extrusion spring 51 Guide mechanism 52 Guide convex portion 53 Guide concave portion

Claims (7)

A rotary lock device that locks rotation in which a winding shaft wound around a winding member and rotatably supported by a fixed shaft rotates in a winding direction by an urging force of a winding spring,
A one-way clutch that is provided between the winding shaft and the fixed shaft and that allows the winding shaft to rotate in the pull-out direction of the winding member and switches the locking of the winding shaft in the winding direction. Mechanism,
An unlocking member provided so as to be slidable in the axial direction of the fixed shaft, and performing switching of the one-way clutch mechanism by the sliding;
The lock release member is detachably attached to the fixed shaft, and the lock of the lock release member is locked by engagement with the lock release member to hold the one-way clutch mechanism in a state where the winding shaft is allowed to rotate. A locking plate to
An operation member that slides the unlocking member so that the one-way clutch mechanism is allowed to rotate the winding shaft ;
The one-way clutch mechanism includes a take-up shaft side ratchet tooth provided on the take-up shaft side, and a fixed shaft-side ratchet tooth provided on the fixed shaft side and detachably engaged with the take-up shaft side ratchet tooth. It is formed by, The rotation lock device characterized by the above-mentioned. A reversing piece that acts so that the lock plate is disengaged from the lock release member when rotating in the pull-out direction without acting on the lock plate when the take-up shaft rotates in the take-up direction. The rotation lock device according to claim 1, wherein the rotation lock device is provided on the winding shaft. A rotary lock device that locks rotation in which a winding shaft wound around a winding member and rotatably supported by a fixed shaft rotates in a winding direction by an urging force of a winding spring,
A one-way clutch that is provided between the winding shaft and the fixed shaft and that allows the winding shaft to rotate in the pull-out direction of the winding member and switches the locking of the winding shaft in the winding direction. Mechanism,
An unlocking member provided so as to be slidable in the axial direction of the fixed shaft, and performing switching of the one-way clutch mechanism by the sliding;
The lock release member is detachably attached to the fixed shaft, and the lock of the lock release member is locked by engagement with the lock release member to hold the one-way clutch mechanism in a state where the winding shaft is allowed to rotate. A locking plate to
An operation member that slides the unlocking member so that the one-way clutch mechanism is allowed to rotate the winding shaft ;
A reversing piece that acts so that the lock plate is disengaged from the lock release member when rotating in the pull-out direction without acting on the lock plate when the take-up shaft rotates in the take-up direction. Is provided on the take-up shaft . The one-way clutch mechanism, either provided retractably in one of the ratchet formation surface or ratchet formation surface of the fixed shaft side ratchet teeth of the take-up shaft side ratchet teeth, upon rotation in the drawing direction of the winding shaft rotation lock device according to claim 1 or 2, wherein the contact with the ratchet formation surface of the mating further comprising an extrusion cam mechanism to maintain a distance between the ratchet formation surface of the mating. The ratchet forming surface of the take-up shaft side ratchet teeth and the ratchet forming surface of the fixed shaft side ratchet teeth are provided with a guide mechanism that can be engaged with each other when the take-up shaft rotates in the winding direction. 5. The rotation lock device according to claim 1 , wherein the winding shaft and the fixed shaft are brought close to each other by engagement of a mechanism to guide the ratchet teeth to meshing. The push cam mechanism is rotatably provided on any one of the ratchet forming surfaces, and the push cam moves in and out with respect to the ratchet forming surface by the turn, and the push cam is pushed out so as to protrude from the ratchet forming surface. 5. The rotation lock device according to claim 4 , wherein the rotation lock device is formed by an extruding spring that rotationally biases the cam. The guide mechanism includes a guide convex portion formed on the outer peripheral side of the ratchet forming region of one ratchet forming surface so as to be higher than the ratchet teeth, and the other ratchet forming surface that can be engaged with the guide convex portion. The rotation lock device according to claim 5, further comprising a guide recess formed on the outer peripheral side of the rotary lock device.

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