JP5311651B2 - Shutter lock device and shutter device - Google Patents

Description

  The present invention is capable of locking a shutter curtain so as not to be closed and opened to an arbitrary position, and capable of releasing the lock by a lock release operation, and a shutter device including the shutter lock device. About.

  Conventionally, this type of shutter locking device is capable of opening the shutter curtain from any position while being unlocked while operating the unlocking operation unit, and when the operation of the unlocking operation unit is stopped, The shutter curtain is locked so as not to open at an arbitrary position where the operation is stopped (see, for example, Patent Document 1).

JP 2008-138356 A (paragraph [0022], FIGS. 4 and 6)

  However, in the configuration of the conventional shutter locking device described above, in order to open the shutter curtain, the opening operation must be performed simultaneously with the unlocking operation by the unlocking operation unit. Was bad. In particular, when the shutter curtain is changed from the fully closed state to the fully opened state, the operability is deteriorated because the period for performing the opening operation and the unlocking operation simultaneously is long.

  The present invention has been made in view of the above circumstances, and it is possible to lock the shutter curtain so as not to be opened by closing the shutter curtain to an arbitrary position, and to perform a shutter curtain opening operation by releasing the lock. An object of the present invention is to provide a shutter locking device and a shutter device capable of improving the operability in the operation.

  In order to achieve the above object, a shutter locking device according to a first aspect of the present invention includes a ratchet gear that rotates together with a winding shaft of a shutter curtain, and a first rotation axis that is parallel to the rotation axis of the ratchet gear. A ratchet lever that locks and locks the shutter curtain while rotating and allowing the rotation of the ratchet gear in the closing direction in which the shutter curtain is closed, while prohibiting the rotation in the opposite opening direction, In a shutter locking device having an unlocking operation unit for releasing the lock, the ratchet that rotates integrally with the ratchet lever and is slidably pressed against the side surface of the ratchet gear and rotated in the opening direction Ratchet effective position where the ratchet lever can be locked to the ratchet gear by friction with the gear Generates a positive biasing force that biases and generates a negative biasing force that biases the ratchet lever to a ratchet invalid position that cannot be locked to the ratchet gear by friction with the ratchet lever rotating in the closing direction. By the operation of the sliding contact rotation member and the lock release operation portion, the ratchet lever is moved from the ratchet effective position by rotating from the standby position around the second rotation axis parallel to the first rotation axis to the lock release position. While moving to the ratchet invalid position, the positive biasing force received by the ratchet lever is received by the distal end surface of the second rotating shaft in the rotating radial direction, and between the first and second rotating shafts together with the ratchet lever. The release holding lever that can hold the ratchet lever in the ratchet invalid position and the release holding lever are biased to the standby position, and the ratchet Ttoreba having characterized in that has a biasing means waiting position that allows to separate from the release retention lever receives a negative biasing force.

  According to a second aspect of the present invention, in the shutter locking device according to the first aspect, the take-up shaft is rotatably supported by a support shaft that penetrates the center portion, and an end surface of the take-up shaft is provided with an uneven surface. In the ratchet gear, a shaft insertion hole through which the support shaft is inserted is formed in the center, and the gear side that can be engaged with the concave and convex engagement portion of the winding shaft around the shaft insertion hole A concave / convex engaging part is formed, and an annular structure inserted through the outside of the support shaft is formed and can be fixed to the support shaft, and the ratchet gear, ratchet lever, release holding lever, standby position urging means and sliding contact rotation A fixed housing that houses the member, and a front side end surface of the fixed housing that faces the one end surface of the take-up shaft. Characterized in place and a front hole for exposing towards.

  According to a third aspect of the present invention, in the shutter locking device according to the second aspect, a rotary damper that rotates in conjunction with the ratchet gear and applies a rotational resistance corresponding to the rotational speed to the ratchet gear is fixed to the fixed housing. It is characterized by the provision.

  According to a fourth aspect of the present invention, in the shutter locking device according to the second or third aspect, the reciprocation is provided on the rear end surface of the fixed housing opposite to the front end surface and is capable of reciprocating in the axial direction of the support shaft. A moving member, an origin urging means for urging the reciprocating member to the origin position on the fixed housing side, a wire for pulling away from the origin position of the reciprocating member, and a side away from the origin position of the reciprocating member It is characterized in that it is provided with an action conversion mechanism that converts the movement of the release holding lever from a standby position to a lock release position.

  According to a fifth aspect of the present invention, in the shutter locking device according to the fourth aspect, the shutter curtain projects laterally from one end surface of the winding shaft, and the fixed housing is wound in the radial direction of the winding shaft. It is characterized in that it is smaller than the outer diameter of the take-up shaft and can be accommodated inside the shutter curtain wound around the take-up shaft.

  A shutter device according to a sixth aspect of the invention comprises the shutter locking device according to any one of the second to fifth aspects, a shutter curtain, a winding shaft, and a support shaft. Has characteristics.

[Invention of Claim 1]
In the shutter locking device according to claim 1, when the shutter curtain is closed and the ratchet gear receives a torque in the closing direction, the sliding contact rotating member is caused by the friction of the sliding contact between the ratchet gear and the sliding contact rotating member. The ratchet lever that can rotate integrally with the ratchet is biased to a ratchet invalid position that cannot be locked to the ratchet gear. Thus, while the shutter curtain is being closed, the ratchet lever is not locked to the ratchet gear, and the shutter curtain can be closed to an arbitrary position. In addition, since the ratchet lever and the ratchet gear do not contact while the shutter curtain is closed, the silence can be improved.

  On the other hand, when the closing operation of the shutter curtain is stopped and the winding shaft is urged or operated in the winding direction of the shutter curtain and the ratchet gear receives the torque in the opening direction, the sliding movement between the ratchet gear and the sliding contact rotating member occurs. The ratchet lever is urged to the ratchet effective position that can be locked to the ratchet gear by the contact friction. Thus, while the shutter curtain is being closed, the ratchet lever is not locked to the ratchet gear, and the shutter curtain can be closed to an arbitrary position. When the closing operation is stopped, the ratchet lever The shutter curtain can be locked so as not to open at an arbitrary position by being engaged with the gear.

  In order to release the lock and open the shutter curtain, the lock release operation unit may be operated. Then, when the unlocking operation unit is operated once, the release holding lever is rotated from the standby position to the unlocking position in the process, and the ratchet lever is moved from the ratchet effective position to the ratchet invalid position.

  Here, when the ratchet lever is moved to the ratchet invalid position by the release holding lever, the ratchet lever moves to the endmost ratchet invalid position outside the interference area with the release holding lever. When the shutter curtain is opened, the ratchet lever moves closer to the ratchet effective position from the shortest ratchet invalid position due to friction between the ratchet gear that rotates in the opening direction and the sliding contact rotation member. Move to an intermediate ratchet invalid position. Then, the ratchet lever comes into contact with the distal end surface of the release holding lever in the rotational radial direction, and the ratchet lever and the release holding lever are in a stretched state between the first and second rotation shafts. Accordingly, the ratchet lever is held at the ratchet invalid position, and the unlocked state is maintained even when the operation of the unlocking operation unit is stopped.

  As described above, according to the present invention, since the unlocked state is maintained by operating the unlocking operation unit once, it is not necessary to continue the unlocking operation by the unlocking operation unit. In addition, when the winding shaft is biased in the direction of winding the shutter curtain, the shutter curtain can be opened with only the biasing force applied to the winding shaft once the unlocking operation is performed. it can. Moreover, what is necessary is just to close a shutter curtain in order to cancel a lock release state. Then, due to the friction between the ratchet gear that rotates in the closing direction with the shutter curtain closing operation and the sliding contact rotation member, the ratchet lever moves from the intermediate ratchet invalid position to the endmost ratchet effective position, Move away from the release holding lever. Then, the release holding lever returns to the standby position by the bias of the standby position biasing means.

  Therefore, according to the shutter locking device of the present invention, it is possible to lock the shutter curtain so as not to be opened by closing the shutter curtain, and a series of operations for releasing the lock and opening the shutter curtain. Operability in operation can be improved.

[Invention of claim 2]
The shutter lock device according to claim 2 has a unit structure in which a ratchet gear, a ratchet lever, and the like are accommodated in a fixed housing having an annular structure. Can be easily connected to each other. That is, the fixed housing is inserted into the outside of the support shaft, and the uneven engagement portion on one end surface of the take-up shaft and the gear side uneven engagement portion of the ratchet gear exposed through the front hole of the fixed housing are uneven. If the fixed housing and the support shaft are fixed at the engaged position, the shutter locking device is connected between the winding shaft and the support shaft.

[Invention of claim 3]
In the shutter locking device according to the third aspect, since the rotary damper suppresses the moving speed of the shutter curtain, it is possible to prevent the shutter curtain from suddenly stopping at the fully open position or the fully closed position and generating excessive noise.

[Invention of claim 4]
According to the shutter lock device of the fourth aspect, the unlocked state is maintained by pulling the wire once and releasing the hand.

[Invention of claim 5]
Since the shutter locking device according to the fifth aspect is accommodated in the space inside the wound shutter curtain, the space can be used effectively. Thereby, the shutter device provided with the shutter locking device can be configured to be compact in the lateral direction.

[Invention of claim 6]
According to the shutter device of claim 6, since the shutter lock device according to any one of claims 2 to 5 is provided, the shutter curtain is locked to an arbitrary position in a closed state. In addition, the operation of releasing the lock and opening the shutter curtain can be easily performed.

The perspective view of the shutter apparatus which concerns on one Embodiment of this invention. Perspective view of shutter device Disassembled perspective view of shutter device Rear perspective view of shutter locking device Front perspective view of shutter locking device A perspective view of the shutter locking device with the lid removed A perspective view of the shutter locking device with the ratchet gear removed Perspective view of main parts of shutter locking device Side view of shutter locking device Side sectional view of the shutter locking device with the shutter curtain closed Side sectional view of the shutter locking device with the shutter curtain open Side sectional view of shutter locking device immediately after unlocking operation Side sectional view of the shutter locking device maintaining the unlocked state

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. The shutter device 10 according to the present embodiment shown in FIG. 1 is attached to, for example, an upper edge portion of a house window (not shown), and has a winding shaft 12 for winding the shutter curtain 15. The support shaft 11 is rotatably supported.

  As shown in FIG. 3, the take-up shaft 12 is formed by fitting a disk 13 inside both ends of the cylindrical drum 12D (only one end of the cylindrical drum 12D is shown in FIG. 3). A screw hole 13A is formed at a predetermined location on the peripheral surface of the disk 13, and a screw insertion hole 12A is formed through the cylindrical drum 12D so as to correspond to the screw hole 13A. Then, the screw N1 (see FIG. 1) inserted through the screw insertion hole 12A is fastened to the screw hole 13A of the disk 13, and the cylindrical drum 12D and the disk 13 are fixed so as to be integrally rotatable.

  As shown in FIG. 3, a center hole 13 </ b> C is formed through the center of the disk 13, and a plurality of positions (for example, eight locations) equally divided around the center hole 13 </ b> C on the end surface of the disk 13 have a plurality of positions. A screw hole 13B is formed. A coupling ring 14 is fixed to the disk 13 on one end side of the winding shaft 12. The coupling ring 14 has a structure in which a plurality of connecting projections 14A (corresponding to the “concave engagement portion of the winding shaft” of the present invention) are bent at a right angle from the inner peripheral edge of the disc-shaped ring body 14H. It has become. Each connecting protrusion 14 </ b> A is curved in an arc shape concentric with the central axis of the coupling ring 14. The ring main body 14H is formed with a plurality of mounting holes 14B at a plurality of positions (for example, four locations) equally divided in the circumferential direction. Then, with the ring body 14H overlaid on the end face of the disk 13 and the connecting protrusion 14A protruding to the opposite side of the disk 13, the screw through the mounting hole 14B is tightened into the screw hole 13B of the disk 13 and the coupling ring 14 is fixed to the disk 13 so as to be integrally rotatable.

  The support shaft 11 has a cylindrical pipe structure, and extends in both lateral directions from both end surfaces of the winding shaft 12 through the center holes 13C at both ends of the winding shaft 12 (specifically, the center holes 13C of the disk 13). ing. And the both ends of the support shaft 11 are each fixed to the attachment base which is not shown in figure so that rotation is impossible, and these attachment bases are being fixed to the wall surface of a residence. A bearing 11 </ b> B (for example, a bearing or a sliding metal) is fitted between the outer peripheral surface of the support shaft 11 and the inner peripheral surface of the center hole 13 </ b> C in the winding shaft 12.

  In addition, a torsion coil spring (not shown) is wound around the support shaft 11 inside the winding shaft 12, and one end of the torsion coil spring is fixed to a screw hole 13B of the disk 13 via a screw (not shown). The other end is fixed to the support shaft 11 with a screw or the like. Thereby, the winding shaft 12 is biased in the direction of winding the shutter curtain 15.

  As shown in FIG. 1, the shutter curtain 15 has a known caterpillar structure formed by connecting a plurality of band-shaped metal plates. Further, the lateral width of the shutter curtain 15 is larger than the axial length of the winding shaft 12. Then, one end portion of the shutter curtain 15 in the winding length direction is directed to the outer peripheral surface of the winding shaft 12 so that the shutter curtain 15 protrudes from both end surfaces of the winding shaft 12 in both lateral directions. Is screwed to the winding shaft 12. Specifically, the screw N fastened to the screw hole 13A on the peripheral surface of the disk 13 is inserted into a screw insertion hole (not shown) provided at one end of the shutter curtain 15, and the cylindrical drum 12D. The shutter curtain 15 is fastened together with the screw hole 13 </ b> A of the disk 13.

  Moreover, the shutter rail which is not shown in figure is each provided in the both-sides edge part of the window of the house in which the shutter apparatus 10 is attached. Then, both sides of the portion of the shutter curtain 15 that extends downward from the winding shaft 12 are maintained in engagement with the shutter rails, and the lower end of the shutter curtain 15 is manually pulled downward to wind the winding. The shutter curtain 15 is pulled out from the take-up shaft 12 with the rotation of the take-up shaft 12.

  The shutter device 10 is provided with a shutter lock device 20 for closing the shutter curtain 15 to an arbitrary position in the vertical direction of the window and locking the shutter curtain 15 so as not to open upward.

  As shown in FIG. 3, the shutter locking device 20 includes a flat disk-shaped fixed housing 21. As shown in FIG. 2, a shaft insertion hole 21 </ b> A is formed through the shaft center of the fixed housing 21, and the support shaft 11 is inserted in a loosely fitted state inside the shaft insertion hole 21 </ b> A.

  As shown in FIG. 3, the fixed housing 21 has a front end face 21 </ b> F and a rear end face 21 </ b> R facing in a direction orthogonal to the support shaft 11, and the front end face 21 </ b> F faces one end face of the winding shaft 12. Has been placed. Furthermore, the outer diameter of the fixed housing 21, which is also the outer diameter of the shutter locking device 20 as a whole, is slightly smaller than the outer diameter of the winding shaft 12. When the shutter curtain 15 is wound around the winding shaft 12 and becomes cylindrical, the shutter curtain 15 is disposed inside the cylindrical shutter curtain 15.

  As shown in FIG. 4, a pair of housing fixing pieces 22, 22 protrude from the opposing position at the opening edge of the shaft insertion hole 21 </ b> A on the rear end surface 21 </ b> R of the fixed housing 21. Then, the bolt N3 shown in FIG. 2 is provided in a bolt insertion hole 22A that penetrates both of the housing fixing pieces 22 and 22 on the coaxial line and an attachment hole (not shown) that penetrates the support shaft 11 in the radial direction. The fixed housing 21 is fixed to the support shaft 11 by being inserted. A screw is cut in the inner surface of the bolt insertion hole 22A of the housing fixing piece 22, and the bolt N3 is screwed into a screw on the inner surface of the bolt insertion hole 22A.

  As shown in FIG. 5, the wall portion constituting the front end face 21 </ b> F of the fixed housing 21 is a lid body 23. The lid body 23 is fixed to the main body of the fixed housing 21 with a screw N4, and has a front hole 23A having a diameter larger than that of the shaft insertion hole 21A at the center. A plurality of projecting piece connecting holes 26B (corresponding to the “gear side uneven engagement portion” of the present invention) provided in the ratchet gear 26 described below through the front surface hole 23A are formed on one end surface of the winding shaft 12. I'm here.

  FIG. 6 shows a state in which the lid body 23 is removed from the main body of the fixed housing 21. As shown in the figure, a ratchet gear 26 is disposed coaxially with the shaft insertion hole 21 </ b> A inside the fixed housing 21. The ratchet gear 26 has a disk shape and has a shaft insertion hole 26A at the center. Further, around the shaft insertion hole 26 </ b> A in the ratchet gear 26, a plurality of arc-shaped projecting piece connecting holes 26 </ b> B are equally arranged. Then, the plurality of connecting projections 14A in the coupling ring 14 provided at one end of the winding shaft 12 are inserted into the plurality of protruding piece connecting holes 26B of the ratchet gear 26 through the front hole 23A of the lid 23, As a result, the ratchet gear 26 is connected to the winding shaft 12 so as to be integrally rotatable. Hereinafter, the direction in which the ratchet gear 26 rotates together with the winding shaft 12 when the shutter curtain 15 is closed is referred to as a “closed direction”, and the direction in which the ratchet gear 26 rotates together with the winding shaft 12 when the shutter curtain 15 is opened is referred to as “ “Open direction”.

  A plurality of locking teeth 26 </ b> T protrude from the outer peripheral surface of the ratchet gear 26. Each of the locking teeth 26T is inclined so as to protrude toward the front side in the rotation direction when the ratchet gear 26 is rotated in the opening direction. More specifically, as shown in FIGS. 6 and 10, the tooth surface facing the front side when the ratchet gear 26 is rotated in the opening direction among the locking teeth 26 </ b> T is a rotation shaft of the ratchet lever 30 described later. An arc-shaped locking surface 26 </ b> K centered on a certain first rotation support shaft 31 is formed. On the other hand, of the locking teeth 26T, the tooth surface facing the rear side when the ratchet gear 26 is rotated in the opening direction, in other words, the tooth surface facing the front side when the ratchet gear 26 is rotated in the closing direction, A slidable contact surface 26S that is inclined away from the adjacent locking tooth 26T as it goes toward the tip of the locking tooth 26T. In addition, the outer edge part including the latching tooth | gear 26T among the ratchet gear 26 is covered with the cover body 23 (refer FIG. 5).

  A plurality of locking recesses 26 </ b> C are formed at the edge portion of the shaft insertion hole 26 </ b> A of the ratchet gear 26. A plurality of arc-projecting walls 24A provided at the tip of the connecting sleeve 24 shown in FIG. The connecting sleeve 24 has a length arranged in the fixed housing 21, and a ring-shaped interlocking gear 25 (tooth on the outer peripheral surface is omitted from the drawing) is integrally formed at the axial middle portion. Has been.

  As shown in FIG. 7, a center pipe 24 </ b> P is provided inside the connection sleeve 24, and the center pipe 24 </ b> P is integrally formed on the rear end wall of the fixed housing 21. The inside of the center pipe 24P is the above-described shaft insertion hole 21A, and the support shaft 11 (see FIG. 2) is inserted therethrough.

  As shown in FIG. 2, a rotary damper 29 is attached to the rear end surface 21 </ b> R of the fixed housing 21. A gear fixed to a rotary shaft (not shown) of the rotary damper 29 is meshed with the interlocking gear 25 through a through hole 21 </ b> B (see FIG. 7) formed in the fixed housing 21. The rotary damper 29 imparts to the ratchet gear 26 a rotational resistance that increases as the rotational speed of the ratchet gear 26 increases, thereby restricting the sudden rise of the shutter curtain 15.

  As shown in FIG. 6, a first rotation support shaft 31 and a second rotation support shaft 41 are provided between the side wall 21 </ b> S of the fixed housing 21 and the ratchet gear 26. Both the first rotation support shaft 31 and the second rotation support shaft 41 extend in parallel with the rotation axis of the ratchet gear 26, for example, 45 degrees around the rotation center of the ratchet gear 26, as shown in FIG. The both ends are sandwiched between the front end face 21F and the rear end face 21R which are the front and rear wall parts of the fixed housing 21.

  In the present embodiment, the center axis of the first rotation support shaft 31 corresponds to the “first rotation axis” according to the present invention, and the center axis of the second rotation support shaft 41 corresponds to the “first rotation axis” according to the present invention. Corresponds to “two pivot axes”. The ratchet lever 30 according to the present invention is provided so as to be rotatable around the first rotation support shaft 31, while the release holding lever 40 according to the present invention rotates around the second rotation support shaft 41. It is provided to be movable.

  As shown in FIG. 8, the ratchet lever 30 extends from the first rotation support shaft 31 to a position closer to the second rotation support shaft 41). Further, the base end portion of the ratchet lever 30 is provided with a base end protrusion 35 that protrudes away from the second rotation support shaft 41.

  As shown in FIG. 6, the locking claw 32 protrudes toward the ratchet gear 26 from a position near the tip of the ratchet lever 30 on the second rotation support shaft 41 side. The locking claw 32 has a substantially triangular shape corresponding to the concave shape between the adjacent locking teeth 26T, 26T, and supports the inclined surface 32S inclined with respect to the rotation radius of the ratchet lever 30 for the first rotation. While being provided on the shaft 31 side, an arc-shaped locking surface 32 </ b> K centered on the first rotation support shaft 31 is provided on the side away from the first rotation support shaft 31. Then, when the ratchet gear 26 receives the rotational torque in the opening direction in a state in which the locking claw 32 is urged to be pressed against the locking teeth 26T, as shown in FIG. The locking surface 32K comes into contact with the locking surface 26K of one of the locking teeth 26T, and the ratchet lever 30 is locked to the ratchet gear 26, thereby inhibiting the rotation of the ratchet gear 26. As a result, the shutter curtain 15 is locked so as not to open. As shown in FIG. 10, when the locking claw 32 is separated from the locking teeth 26T, the ratchet lever 30 cannot be locked to the ratchet gear 26, and the rotation of the ratchet gear 26 is allowed.

  In order to urge the ratchet lever 30 toward the ratchet effective position that can be locked to the ratchet gear 26, the sliding contact rotating member 34 according to the present invention is fixed to the ratchet lever 30 so as to be integrally rotatable. . As shown in FIG. 8, the sliding contact rotation member 34 includes a main sliding contact piece 34A and a sub sliding contact piece 34B that protrude from the ratchet lever 30 to the ratchet gear 26 side. The main sliding contact piece 34 </ b> A has a shape obtained by cutting a spring plate material into a V shape, and both ends of the “V” shape are the first rotation support shaft 31 and the ratchet gear 26 at the edge of the ratchet lever 30. Are arranged at two positions on both the left and right sides of an imaginary line connecting the rotation centers. Then, the V-shaped corners of the main sliding contact piece 34 </ b> A protrude from the ratchet lever 30 toward the rotation center side of the ratchet gear 26. On the other hand, the sub-sliding contact piece 34B has a triangular shape surrounded by the outer edge portion of the ratchet lever 30 and the V-shaped sides of the main sliding contact piece 34A. As shown in FIG. 6, the main sliding contact piece 34 </ b> A and the sub sliding contact piece 34 </ b> B are pressed against the side surface of the ratchet gear 26 with the outer edge portion of the ratchet gear 26 sandwiched in the plate thickness direction. In addition, a slidable contact projection 34T that is bent so as to protrude toward the side surface of the ratchet gear 26 is provided at the corner of the V-shape of the main slidable contact piece 34A. The sub-sliding contact piece 34B is also provided with a sliding contact protrusion (not shown) similar to the main sliding contact piece 34A.

  When the main sliding contact piece 34A (specifically, the sliding contact projection 34T) of the sliding contact rotating member 34 and the sliding contact projection of the sub sliding contact piece 34B are rotated in the opening direction. The ratchet lever 30 is slidably contacted with the side surface of the ratchet gear 26, and the ratchet lever 30 is biased to the ratchet effective position by friction at that time. At this time, the biasing force received by the ratchet lever 30 corresponds to the “positive biasing force” according to the present invention. When the ratchet gear 26 rotates in the closing direction, the ratchet lever 30 is urged to a ratchet invalid position that cannot be locked to the ratchet gear 26 due to friction between the sliding contact rotation member 34 and the side surface of the ratchet gear 26. . At this time, the urging force received by the ratchet lever 30 corresponds to the “negative urging force” according to the present invention.

  As shown in FIG. 6, the ratchet lever 30 has a substantially columnar shape toward the rear end surface 21 </ b> R side of the fixed housing 21 at the tip position protruding from the locking claw 32 toward the second rotation support shaft 41. The rotation interference part 33 is projected.

  The release holding lever 40 is disposed on the rear end face 21R side from the ratchet gear 26, and the action rotation piece 42 protruding from the second rotation support shaft 41 to the first rotation support shaft 31 side and the first rotation support thereof. The seesaw structure has a shaft 31 and a connecting rotation piece 43 projecting to the opposite side. Further, a torsion coil spring 46 (corresponding to the “standby position biasing means” of the present invention) is provided between the release holding lever 40 and the fixed housing 21, and is released and held by the elastic force of the torsion coil spring 46. In the movable range of the lever 40, the distal end portion of the action rotating piece 42 is biased to a standby position closest to the rotation center of the ratchet gear 26.

  A part of the movable region at the tip of the action rotating piece 42 overlaps a part of the movable region of the rotation interference unit 33. Here, when an overlapping portion of the movable region at the tip of the action rotation piece 42 and the movable region of the rotation interference unit 33 is referred to as an “interference region”, the release holding lever 40 is in the standby position, The distal end portion of the action rotating piece 42 is disposed at a position deviating from the interference region to the rotation center side of the ratchet gear 26. Then, while the release holding lever 40 rotates to the lock release position on the side opposite to the standby position in the rotatable range, the jumping contact surface facing the front side in the rotation direction at the tip of the action rotation piece 42. 45 (see FIG. 8) presses the rotation interference portion 33 in a direction away from the ratchet gear 26, and the ratchet lever 30 reaches the end of the ratchet invalid position where the rotation interference portion 33 is disposed outside the interference region. Is rotated (see FIG. 12).

  The distal end of the action turning piece 42 is provided with a tip abutting surface 44 that faces the turning radius direction of the action turning piece 42 and is slightly depressed in the center. The front end abutting surface 44 is disposed in the interference region in a state where the release holding lever 40 is located at the lock release position. Then, the ratchet lever 30 receives a positive biasing force from the ratchet gear 26 that rotates in the opening direction via the sliding contact rotation member 34, so that the ratchet intermediate position from the most ratchet invalid position to the ratchet effective position is intermediate. When moved to the invalid position, as shown in FIG. 13, the tip abutting surface 44 comes into contact with the sliding contact rotation member 34, and the ratchet lever between the first and second rotation support shafts 31, 41. 30 and the release holding lever 40 are held in tension. As a result, the ratchet lever 30 is held at the ratchet invalid position, and the unlocked state is maintained.

  As shown in FIG. 2, an operation hole 21 </ b> W is formed in the rear end surface 21 </ b> R of the fixed housing 21 at a portion facing the movable region of the connecting rotation piece 43. The operation hole 21 </ b> W has a rectangular shape that is long in the direction in which it is in contact with and away from the support shaft 11. Further, from the opening side edge along one long side of the operation hole 21 </ b> W in the rear end face 21 </ b> R of the fixed housing 21, the support protrusion 50 protrudes rearward, and the relay lever 51 can be tilted to the support protrusion 50. It is supported.

  The relay lever 51 is formed by bending a sheet metal into a crank shape, and is rotatably attached by a screw 51J in a state where the first rotating piece 51A on one end side of the bent portion is overlapped with the support protruding piece 50. Yes. Then, the tip of the first rotating piece 51A reciprocates in the longitudinal direction of the operation hole 21W. The second turning piece 51B on the other end side of the bent portion of the relay lever 51 is disposed on the outer edge side of the rear end face 21R of the fixed housing 21 so as to avoid the support shaft 11, and the second turning piece. A wire 53 is connected to the tip of 51B. The distal end of the wire 53 is connected to a lock release operation unit (not shown) provided in the room of the window to which the shutter device 10 is attached. Further, a hook 51Y is formed at the proximal end portion of the second rotating piece 51B near the bent portion. Correspondingly, a hook 51X is also formed on the rear end surface 21R of the fixed housing 21, and a tension coil spring 52 (corresponding to the “origin urging means” of the present invention) is bridged between the hooks 51X and 51Y. Has been. Accordingly, the relay lever 51 is biased in a direction in which the second rotating piece 51B approaches the rear end surface 21R of the fixed housing 21, and the distal end portion of the first rotating piece 51A is supported by the support shaft in the operation hole 21W. The relay lever 51 is disposed at the origin position located at the end portion on the side away from the head 11. When the wire 53 is pulled to the side where the second rotating piece 51B is separated from the rear end surface 21R by the operation of the unlocking operation portion, the tip end portion of the second rotating piece 51B is moved to the end portion on the support shaft 11 side. In the process, the tip of the first turning piece 51A presses the connecting turning piece 43 of the release holding lever 40. As a result, the release holding lever 40 rotates from the standby position to the lock release position.

  The description regarding the configuration of the shutter device 10 and the shutter locking device 20 of the present embodiment has been described above. Next, functions and effects of the shutter device 10 and the shutter lock device 20 will be described. In the shutter device 10 and the shutter locking device 20 of the present embodiment, when the shutter curtain 15 is closed and the ratchet gear 26 receives torque in the closing direction, the ratchet gear 26 and the sliding contact rotating member 34 are in sliding contact. Due to this friction, the ratchet lever 30 that can rotate integrally with the sliding contact rotating member 34 is biased to a ratchet invalid position that cannot be locked to the ratchet gear 26. As a result, as shown in FIG. 10, while the shutter curtain 15 is being closed, the ratchet lever 30 is not separated from the ratchet gear 26 and locked, and the shutter curtain 15 can be closed to an arbitrary position. it can. Furthermore, since the ratchet lever 30 and the ratchet gear 26 are not in contact with each other while the shutter curtain 15 is being closed, the silence can be improved.

  On the other hand, when the opening of the shutter curtain 15 is stopped and the ratchet gear 26 receives torque in the opening direction by the winding shaft 12 biased in the winding direction of the shutter curtain 15, the sliding contact with the ratchet gear 26 occurs. The ratchet lever 30 is urged to a ratchet effective position that can be locked to the ratchet gear 26 by friction in sliding contact with the rotating member 34. Thus, while the shutter curtain 15 is being closed, the ratchet lever 30 is not locked to the ratchet gear 26 as shown in FIG. 10, and the shutter curtain 15 can be closed to an arbitrary position. When the closing operation is stopped, as shown in FIG. 11, the ratchet lever 30 is locked to the ratchet gear 26 and can be locked so as not to open the shutter curtain 15 at an arbitrary position.

  When releasing the lock and opening the shutter curtain 15, a lock release operation unit (not shown) in the room is pulled. At this time, when the unlocking operation unit is operated once, in the process, the release holding lever 40 is rotated from the standby position (see FIG. 11) to the unlocking position (see FIG. 12), and the ratchet lever 30 is ratchet-enabled. Move from position to ratchet invalid position. Thereby, the shutter curtain 15 can be opened.

  Here, when the ratchet lever 30 is moved to the ratchet invalid position by the release holding lever 40, the ratchet lever 30 moves to the endmost ratchet invalid position outside the interference area with the release holding lever 40. When the shutter curtain 15 is opened, the ratchet lever 30 is moved to the opening direction by the friction between the ratchet gear 26 that rotates in the opening direction and the sliding contact rotation member 34, so that the ratchet lever 30 is moved to the endmost ratchet invalid position. To the ratchet invalid position in the middle of the ratchet effective position. Then, the ratchet lever 30 is brought into contact with the tip abutting surface 44 as shown in FIG. 13, and the ratchet lever 30 and the ratchet lever 30 are located between the first and second rotation support shafts 31 and 41. The release holding lever 40 is held in a stretched state. Accordingly, the ratchet lever 30 is held at the ratchet invalid position and the unlocked state is maintained, so that the shutter curtain 15 can be automatically wound. That is, the shutter curtain 15 can be automatically opened.

  That is, since the unlocking state is maintained by operating the unlocking operation unit once, it is not necessary to continue the unlocking operation by the unlocking operation unit. That is, the shutter curtain 15 can be opened only by the urging force applied to the winding shaft 12 once the unlocking operation is performed. Further, in order to cancel the unlocked state, it is only necessary to close the shutter curtain 15. Then, due to the friction between the ratchet gear 26 that rotates in the closing direction with the closing operation of the shutter curtain 15 and the sliding contact rotation member 34, the ratchet lever 30 moves from the intermediate ratchet invalid position as shown in FIG. It moves to the endmost ratchet effective position and moves away from the release holding lever 40. Then, the release holding lever 40 returns to the standby position by the urging of the torsion coil spring 46.

  As described above, according to the shutter device 10 and the shutter lock device 20 of the present embodiment, the shutter curtain 15 can be locked to an arbitrary position so as not to be opened, and the lock is released. The operability in a series of operations for opening the shutter curtain 15 can be improved. In addition, while the unlocked state can be maintained, the unlocked state is canceled when the shutter curtain 15 is closed, so that it is possible to prevent a situation where the user forgets to lock the shutter curtain 15 after the shutter curtain 15 is closed. it can. Furthermore, since the rotary damper 29 suppresses the moving speed of the shutter curtain 15, it is possible to prevent a situation in which the shutter curtain 15 suddenly stops at the fully open position and excessive noise is generated. In addition, the operation sound in the middle toward the fully open position can be reduced.

  In addition, the shutter locking device 20 of the present embodiment has a unit structure in which the ratchet gear 26, the ratchet lever 30 and the like are accommodated in the annular fixed housing 21, so that the winding shaft of the shutter curtain 15 is provided. 12 and the support shaft 11 can be easily connected. That is, the fixed housing 21 is inserted outside the support shaft, and the uneven engagement portion on one end surface of the winding shaft 12 and the uneven engagement on the gear side of the ratchet gear 26 exposed through the front hole of the fixed housing 21. If the fixed housing 21 and the support shaft are fixed at the position where the portion engages with the concave and convex portions, the shutter locking device 20 is connected between the winding shaft 12 and the support shaft.

  In addition, since the shutter locking device 20 is accommodated in a space inside the wound shutter curtain 15, the space can be used effectively. Thereby, the shutter apparatus 10 can be made into a compact configuration in the lateral direction.

[Other Embodiments]
The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various other than the following can be made without departing from the scope of the invention. It can be changed and implemented.

(1) In the shutter locking device 20 of the above-described embodiment, the sliding contact rotation member 34 is configured to pinch the ratchet gear 26 in the plate thickness direction, but the sliding contact rotation member is provided only on one side surface of the ratchet gear. You may make it the structure pressed.

(2) The shutter locking device 20 of the above embodiment has a structure that fits in the space in the shutter curtain 15 wound around the winding shaft 12, but the outer diameter of the shutter locking device is smaller than that of the winding shaft. You may enlarge and arrange | position to the side of a shutter curtain.

(3) The rotary damper 29 provided in the shutter locking device 20 of the above embodiment has a configuration that suppresses the rising speed of the shutter curtain 15, but suppresses both the rising and lowering speeds so that the fully open position and the fully open position can be reduced. You may make it the structure which prevents the situation which generate | occur | produces the excessive noise by a sudden stop in both positions of a closed position.

(4) The shutter device 10 of the above-described embodiment is configured such that the winding shaft 12 is urged in the direction of winding the shutter curtain 15 by a torsion coil spring (not shown), and the shutter curtain 15 is automatically wound in the unlocked state. However, the shutter curtain 15 may be manually pushed up and wound on the winding shaft 12.

(5) Further, the urging force of the torsion coil spring is such that the shutter curtain 15 cannot be automatically wound by the winding shaft 12, but after the operation of the shutter curtain 15 is stopped, the ratchet lever 30 is rotated to the ratchet invalid position. May be the size.

DESCRIPTION OF SYMBOLS 10 Shutter apparatus 11 Support shaft 12 Winding shaft 14A Connection protrusion (concave-engagement part)
DESCRIPTION OF SYMBOLS 15 Shutter curtain 20 Shutter locking device 21 Fixed housing 26 Ratchet gear 26B Projection piece connection hole 29 Rotary damper 30 Ratchet lever 31 First rotation support shaft 34 Sliding contact rotation member 40 Release holding lever 46 Torsion coil spring (with standby position) Means)
52 Tensile coil spring (origin urging means)

Claims (6)

A ratchet gear that rotates with the winding shaft of the shutter curtain;
Rotating about a first rotation axis parallel to the rotation axis of the ratchet gear, allowing the rotation of the ratchet gear in the closing direction in which the shutter curtain is closed, while prohibiting rotation in the opposite opening direction A shutter locking device including a ratchet lever that is locked to the ratchet gear to lock the shutter curtain, and a lock release operation unit for releasing the lock.
The ratchet lever can be locked to the ratchet gear by rotating integrally with the ratchet lever and being slidably pressed against the side surface of the ratchet gear and by friction with the ratchet gear rotating in the opening direction. A positive urging force for urging the ratchet effective position is generated, and the ratchet lever is urged to the ratchet invalid position that cannot be locked to the ratchet gear by friction with the ratchet lever rotating in the closing direction. A sliding contact rotation member for generating a negative biasing force;
By operating the unlocking operation unit, the ratchet lever is turned from the ratchet effective position to the unlocking position by rotating from the standby position around the second rotation axis parallel to the first rotation axis to the lock release position. The positive urging force received by the ratchet lever is received by the tip end surface of the second rotating shaft in the turning radial direction, and the first and second rotating shafts are moved together with the ratchet lever. A release holding lever capable of holding the ratchet lever in the ratchet invalid position,
And a standby position biasing unit that biases the release holding lever to the standby position and allows the ratchet lever in the stretched state to be separated from the release holding lever by receiving the negative biasing force. A shutter locking device. The winding shaft is rotatably supported by a support shaft penetrating the center portion, and an uneven engagement portion is formed on one end surface of the winding shaft,
The ratchet gear has a shaft insertion hole through which the support shaft is inserted at the center, and a gear side unevenness that can be engaged with the uneven engagement portion of the winding shaft around the shaft insertion hole. An engaging portion is formed,
An annular structure inserted into the outside of the support shaft and fixed to the support shaft, and the ratchet gear, the ratchet lever, the release holding lever, the standby position urging means, and the sliding contact rotating member A fixed housing containing
A front hole formed on the front end face of the fixed housing facing the one end face of the take-up shaft and exposing the gear side uneven engagement portion toward the one end face of the take-up shaft; The shutter locking device according to claim 1.   3. The shutter lock according to claim 2, further comprising a rotary damper fixed to the fixed housing that rotates in conjunction with the ratchet gear and applies a rotation resistance corresponding to the rotation speed to the ratchet gear. apparatus. A reciprocating member provided on a rear end surface opposite to the front end surface of the fixed housing and capable of reciprocating in the axial direction of the support shaft;
Origin biasing means for biasing the reciprocating member to the origin position on the fixed housing side;
A wire for pulling away from the origin position of the reciprocating member;
3. An operation conversion mechanism that converts an operation of the reciprocating member away from the origin position into a rotation of the release holding lever from the standby position to the lock release position. Or the shutter lock device according to 3. The shutter curtain extends laterally from one end surface of the winding shaft,
The fixed housing is smaller than the outer diameter of the winding shaft in the radial direction of the winding shaft, and can be accommodated inside the shutter curtain wound around the winding shaft. Item 5. A shutter locking device according to Item 4.   A shutter device comprising the shutter locking device according to any one of claims 2 to 5, the shutter curtain, the winding shaft, and the support shaft.

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