JP2013167087A - Shutter lock device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shutter lock device capable of eliminating the shortage of strength of a connection protruded part while suppressing an increase in the number of components.SOLUTION: A shutter lock device 20 comprises a ratchet gear 26 which is arranged coaxially with a winding shaft 12, through the center of which a supporting shaft 11 protruded from the end of the winding shaft 12 passes, and which is connected to a cylindrical drum 13 as a thin press molded product fixed to the end of the winding shaft 12, in an integrally rotatable manner. A connection protruded part 26B for connecting the ratchet gear 26 and the cylindrical drum 13 in an integrally rotatable manner is formed by bending and raising part of a sheet plate constituting the ratchet gear 26. The connection protruded part 26B can irregularly engage with the cylindrical drum 13.

Description

  The present invention includes a ratchet gear that is coaxially disposed with a cylindrical drum fixed to an end of a winding core member of a shutter curtain and is coupled to the cylindrical drum so as to be integrally rotatable, and locks the rotation of the ratchet gear. Thus, the present invention relates to a shutter locking device that can hold a shutter curtain at an arbitrary opening / closing position.

  As a connecting structure between this type of conventional shutter locking device and the take-up core member, the connecting protrusion protruding from the end surface of the cylindrical drum can be inserted into a connecting hole formed through the ratchet gear so as to be integrally rotatable. A concatenated configuration is possible. However, the cylindrical drum is generally manufactured by thin plate pressing (for example, deep drawing) or aluminum die casting, and the connecting protrusion formed by bending directly from the cylindrical drum has insufficient strength.

  For this reason, conventionally, an attachment part formed by bending a connecting projection from a sheet metal having sufficient strength is attached to the end surface of the cylindrical drum (see Patent Document 1).

JP 2010-242292 (see paragraph [0026], FIG. 3)

  However, the conventional connection structure described above has a problem that the number of parts increases due to the attachment parts.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a shutter locking device that can eliminate an insufficient strength of a connecting projection while suppressing an increase in the number of parts.

  In order to achieve the above object, the shutter lock device according to the invention of claim 1 is arranged coaxially with the winding core member of the shutter curtain, and has a support shaft protruding from the end of the winding core member. It has a ratchet gear that penetrates the center and is connected to a cylindrical drum fixed to the end of the winding core member so as to be able to rotate integrally. Locking the rotation of the ratchet gear allows the shutter curtain to be opened at any open / closed position. In the shutter locking device that can be held, a connecting projection for connecting the ratchet gear and the cylindrical drum so as to rotate together is formed integrally with the ratchet gear, and the connecting projection can be engaged with the cylindrical drum in an uneven manner. It has the characteristics.

  In the shutter locking device of the present invention, the ratchet gear connecting protrusions can be engaged with the cylindrical drum, which is a thin plate pressed product or an aluminum die cast product, and the ratchet gear engages with the unevenness. The counterpart is not limited to a cylindrical drum that is a pressed product of a thin plate or an aluminum die-cast product.

  According to a second aspect of the present invention, in the shutter locking device according to the first aspect, the connecting protrusion is formed by bending a part of a sheet metal constituting the ratchet gear, and the shaft insertion hole through which the support shaft passes is formed. It is characterized in that it is provided at a plurality of positions that equally divide the inner peripheral edge in the circumferential direction.

  According to a third aspect of the present invention, in the shutter locking device according to the first or second aspect, the connecting protrusion has a flat protrusion shape in the radial direction of the ratchet gear.

  According to the first aspect of the present invention, the connecting protrusion is formed integrally with the ratchet gear, and the connecting protrusion can be engaged with the cylindrical drum fixed to the end of the winding core member. Since the ratchet gear has higher strength than the cylindrical drum, the lack of strength of the connecting protrusion can be solved by integrally forming the connecting protrusion on the ratchet gear. Here, a concave portion that engages with the coupling protrusion is provided on the cylindrical drum. However, compared to the case where the coupling protrusion is bent and raised directly from the cylindrical drum, the strength when the concave portion is provided is ensured. Therefore, it is not necessary to attach a reinforcing part separately to the cylindrical drum. Thereby, it becomes possible to eliminate the insufficient strength of the connecting protrusion while suppressing an increase in the number of parts. Here, the number and arrangement of the connecting protrusions integrally formed on the ratchet gear are arbitrary, but as in claim 2, a part of the sheet metal constituting the ratchet gear is bent and formed to form the connecting protrusions, A configuration in which the connecting protrusions are provided at a plurality of positions in the ratchet gear, in which the inner peripheral edge of the shaft insertion hole is equally divided in the circumferential direction, is particularly preferable. Further, the connecting protrusion may be in the form of a shaft, or may have a flat protrusion shape in the radial direction of the ratchet gear as in the invention of claim 3.

The perspective view of the shutter winding device provided with the locking device for shutters concerning one embodiment of the present invention. Perspective view of shutter take-up device and shutter lock device Rear perspective view of shutter locking device and cylindrical drum Disassembled perspective 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 The perspective view which shows the fixing structure of the shutter locking device and shutter winding device Side sectional view showing fixing structure of shutter locking device and shutter winding device

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. A shutter winding device 10 shown in FIG. 1 is attached to, for example, an upper edge portion of a house window (not shown), and is a winding shaft 12 for winding a shutter curtain 15 (of the present invention). (Corresponding to “winding core member”) is supported by a support shaft 11 so as to be rotatable. The shutter winder 10 is housed in a shutter case (not shown) for housing the wound shutter curtain 15, and the support shaft 11 is interposed between the left and right side walls of the shutter case. It is supported in the state that was done.

  As shown in FIG. 3, the winding shaft 12 has a cylindrical drum 13 with one end closed inside both ends of the winding roll 12D (only one end of the winding roll 12D is shown in FIG. 3). It is mated. For example, the cylindrical drum 13 is formed by press-molding an aluminum sheet metal, and an outer cylindrical body 13A that fits on the inner peripheral surface of the winding roll 12D and an inner cylindrical body 13B that fits on the outer peripheral surface of the support shaft 11. And. Further, annular blocking walls 13 </ b> C that connect one end portions of the inner cylindrical body 13 </ b> B and the outer cylindrical body 13 </ b> A constitute both end surfaces of the winding shaft 12 in the axial direction. A screw hole 13A1 is formed in a predetermined portion of the outer drum body 13A of the cylindrical drum 13, and a screw insertion hole 12A is formed through the winding roll 12D so as to correspond to the screw hole 13A1. Then, the screw N1 (see FIG. 1) inserted through the screw insertion hole 12A is fastened to the screw hole 13A1 of the cylindrical drum 13, and the winding roll 12D and the cylindrical drum 13 are fixed so as to be integrally rotatable.

  As shown in FIG. 3, the inner side of the inner cylinder 13B of the cylindrical drum 13 is a center hole 13B1. Further, an uneven engagement hole 13C1 is formed in the closing wall 13C of the cylindrical drum 13 on which the shutter locking device 20 of the present invention is disposed. The uneven engagement holes 13C1 are formed at a plurality of positions (for example, three locations) equally divided around the center hole 13B1 in the blocking wall 13C. Further, the concave / convex engagement hole 13C1 has a long hole shape corresponding to a cross-sectional shape of a connecting projection 26B described later. In addition, although the uneven | corrugated engagement hole 13C1 of this embodiment is a shape with which the periphery was closed, the shape open | released inside the center hole 13B1 may be sufficient. In addition, the shape of the concave and convex engaging hole 13C1 is not particularly limited as long as it corresponds to the cross-sectional shape of the connecting protrusion 26B described later.

  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 13B1 of the plurality of cylindrical drums 13 fitted inside the winding roll 12D. . Both end portions of the support shaft 11 are fixed to a mounting base (not shown) so as not to rotate, and the mounting bases are fixed to left and right side walls of a shutter case (not shown).

  A torsion coil spring (not shown) is wound around the support shaft 11 inside the winding shaft 12. One end of the torsion coil spring is fixed to the cylindrical drum 13 via a screw (not shown), and the other end is supported on the support shaft. 11 is fixed with a screw or the like. Thereby, the winding shaft 12 is biased in the direction of winding the shutter curtain 15.

  The shutter curtain 15 has a known caterpillar structure formed by connecting a plurality of strip-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 N1 fastened to the screw hole 13A1 on the peripheral surface of the cylindrical drum 13 is also inserted into a screw insertion hole (not shown) provided at one end of the shutter curtain 15, and the winding roll 12D and the shutter curtain 15 are fastened together in the screw hole 13A1 of the cylindrical drum 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 winding apparatus 10 is attached. And the several places of the both sides of the part extended downward from the winding shaft 12 among the shutter curtains 15 are maintained in the state engaged with these shutter rails, and the lower end part of the shutter curtain 15 is pulled down manually. Thus, the shutter curtain 15 is pulled out from the winding shaft 12 while the winding shaft 12 rotates.

  The shutter winder 10 has a shutter locking device 20 for holding the shutter curtain 15 at an arbitrary opening / closing position (specifically, closing the shutter curtain 15 to an arbitrary position and locking it so as not to open upward). Is provided.

  As shown in FIG. 2, the shutter locking device 20 includes a flat disk-shaped housing 21. A shaft insertion hole 21 </ b> A is formed through the shaft center of the housing 21, and the support shaft 11 is inserted in a loosely fitted state inside the shaft insertion hole (see FIG. 1).

  The housing 21 has a front end face 21F and a rear end face 21R with which the support shaft 11 is orthogonal, and the front end face 21F is disposed opposite to one end face of the winding shaft 12 (that is, the closing wall 13C of the cylindrical drum 13). Yes. Further, the outer diameter of the 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.

  The wall constituting the rear end surface 21R of the housing 21 includes a rear end wall 21X integrally formed with the side wall 21S of the housing 21, and a rear sheet metal 60 that is addressed to the rear end wall 21X and is fixed by screws N2. A pair of fixed pieces 22, 22 are bent rearward from a position opposite the opening edge of the rear sheet metal 60 with the shaft insertion hole 21 </ b> A interposed therebetween. In each of the fixed pieces 22, 22, a cutout hole 22 </ b> C is formed at an intermediate portion in the bending line direction at a bent portion between the fixing piece 22 and the main body portion of the rear sheet metal 60. Bolt insertion holes 22B and 22B are formed through the fixing pieces 22 and 22, respectively. These bolt insertion holes 22B and 22B have a long hole shape. The housing 21 is formed by inserting a bolt N3 (see FIG. 1) through the mounting hole 11A and the bolt insertion holes 22B and 22B penetrating the support shaft 11 in the radial direction, and tightening a nut (not shown) at the tip thereof. Is fixed to the support shaft 11. The bolt insertion holes 22 </ b> B and 22 </ b> B have a long hole shape, so that the mounting position of the shutter lock device 20 with respect to the support shaft 11 can be adjusted in the axial direction of the support shaft 11. Accordingly, slight variations in the position of the cylindrical drum 13 in the axial direction of the support shaft 11 and manufacturing variations of the parts are absorbed by the bolt insertion holes 22B and 22B, so that the connecting protrusion 26B and the concave and convex engagement hole 13C1 are securely connected. It is possible to engage with the concave and convex.

  As shown in FIG. 3, the wall portion constituting the front end face 21 </ b> F of the housing 21 is a lid body 23. The lid 23 is fixed to the main body of the housing 21 with a screw N2, and has a front hole 23A having a diameter larger than that of the shaft insertion hole 21A at the center. A plurality of connecting projections 26 </ b> B provided in the ratchet gear 26 described below protrudes toward one end surface of the winding shaft 12 through the front hole 23 </ b> A.

  FIG. 4 is an exploded perspective view of the shutter locking device 20. As shown in the figure, a ratchet gear 26 is disposed coaxially with the shaft insertion hole 21 </ b> A inside the housing 21. The ratchet gear 26 is made of a sheet metal having sufficient strength, has a disk shape, and has a shaft insertion hole 26A at the center. Further, in the ratchet gear 26, connection protrusions 26B are formed at a plurality of positions (for example, three locations) equally divided around the shaft insertion hole 26A. The connecting protrusions 26B are formed by bending a protruding piece projecting from the inner peripheral edge of the shaft insertion hole 26A toward the center in the deployed state, out of the sheet metal constituting the ratchet gear 26, at the base end portion thereof. The ratchet gear 26 has a flat protruding piece shape in the radial direction. More specifically, each connecting projection 26B has a rectangular shape with a flat cross-section (a short side is extremely short with respect to the long side) in a cut surface perpendicular to the rotation axis of the ratchet gear 26, and the shaft is inserted. The inner rim of the hole 26A is parallel to each of the three tangents that are in contact with each other at a position divided into three equal parts in the circumferential direction (see FIG. 5).

  The plurality of connecting projections 26B are connected to a plurality of concave and convex portions formed on one end surface of the winding shaft 12 (specifically, the closing wall 13C of the cylindrical drum 13) via the front hole 23A of the lid body 23. The ratchet gear 26 is connected to the take-up 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 (when the shutter shaft 15 is unwound from the winding shaft 12) is referred to as a “closing direction H1”, and when the shutter curtain 15 is opened (the winding shaft 12). The direction in which the ratchet gear 26 rotates together with the winding shaft 12 is referred to as “opening direction H2”.

  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 H2. More specifically, as shown in FIG. 5, the tooth surface facing the front side when the ratchet gear 26 is rotated in the opening direction H <b> 2 of the locking teeth 26 </ b> T is a rotation axis of the ratchet lever 30 described later. An arc-shaped locking surface 26 </ b> K centered on the one rotation support shaft 31 is formed. On the other hand, the tooth surface facing rearward when the ratchet gear 26 is rotated in the opening direction H2 among the locking teeth 26T is inclined so as to be separated from the adjacent locking teeth 26T toward the tip of the locking teeth 26T. The slidable contact surface 26S. In addition, the outer edge part including the locking tooth 26T among the ratchet gear 26 is covered with the cover body 23 (refer FIG. 3).

  As shown in FIGS. 3 and 4, a center pipe 24P is provided inside the shaft insertion hole 26A of the ratchet gear 26, and the ratchet gear 26 is rotatably supported by the center pipe 24P. The center pipe 24P is integrally formed with the rear end wall 21X of the housing 21 as shown in FIG. 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. 5, a first rotation support shaft 31 and a second rotation support shaft 41 are provided between the side wall 21 </ b> S of the housing 21 and the ratchet gear 26. Both ends of the first rotation support shaft 31 and the second rotation support shaft 41 are supported by the lid body 23 and the rear end wall 21X of the housing 21. Further, 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, and are disposed, for example, at positions separated by about 60 degrees around the rotation center of the ratchet gear 26. ing.

  The ratchet lever 30 is provided to be rotatable about the first rotation support shaft 31, while the release holding lever 40 is provided to be rotatable about the second rotation support shaft 41.

  The ratchet lever 30 extends from the first rotation support shaft 31 toward the second rotation support shaft 41 side. Further, the base end portion of the ratchet lever 30 is provided with a base end protrusion 34 that protrudes away from the second rotation support shaft 41.

  A 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 a first rotation is performed on a slope 32S inclined with respect to the rotation radius direction of the ratchet lever 30. While being provided on the support shaft 31 side, an arc-shaped locking surface 32 </ b> K centering 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 H2 in a state in which the locking claw 32 is urged to be pressed against the locking teeth 26T (the state shown in FIG. 6), the locking claw 32 The locking surface 32K comes into contact with the locking surface 26K of any 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. Further, as shown in FIG. 7, 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 (position shown in FIG. 6) that can be locked to the ratchet gear 26, a ratchet sliding contact member 80 is fixed to the ratchet lever 30 so as to be integrally rotatable. Has been. The ratchet sliding contact member 80 includes a pair of elastic facing pieces 81 and 81 (see FIG. 4) protruding from the outer surface of the ratchet lever 30 facing the ratchet gear 26 toward the ratchet gear 26, and these elastic facing pieces. A ratchet gear 26 is sandwiched between 81 and 81. As shown in FIG. 4, a pair of sliding contact protrusions 81 </ b> T and 81 </ b> T are provided at positions facing each other in the elastic facing pieces 81 and 81 so as to protrude toward the sides approaching each other. The ratchet sliding contact member 80 is formed by punching and bending a sheet metal with a press.

  As shown in FIG. 4, the ratchet sliding contact member 80 inserts the large diameter portion of the first rotation support shaft 31 of the ratchet lever 30 into the mounting hole of the mounting piece 84, and connects the mounting piece 84 to the side surface of the ratchet lever 30. The central plate portion 83 that is in contact with the pair of elastic facing pieces 81 and 81 is assembled in a state of being addressed to the outer surface of the ratchet lever 30 on the ratchet gear 26 side. Thereby, the ratchet sliding contact member 80 and the ratchet lever 30 are in a state in which the ratchet lever 30 can rotate integrally.

  When the ratchet gear 26 rotates in the opening direction H2, the ratchet lever 30 is biased to the ratchet effective position by friction between the ratchet sliding contact member 80 and the side surface of the ratchet gear 26. The biasing force received by the ratchet lever 30 at this time is hereinafter referred to as “positive biasing force”. When the ratchet gear 26 rotates in the closing direction H <b> 1, the ratchet lever 30 is biased to a ratchet invalid position that cannot be locked to the ratchet gear 26 due to friction between the ratchet sliding contact member 80 and the side surface of the ratchet gear 26. .

  As shown in FIG. 4, the ratchet lever 30 is pivoted in a substantially columnar shape toward the rear end face 21 </ b> R side of the housing 21 at the tip position protruding from the locking claw 32 toward the second rotation support shaft 41. The interference part 33 protrudes.

  The release holding lever 40 is disposed on the rear end face 21R side from the ratchet gear 26, and as shown in FIG. 5, the action turning piece 42 protruding from the second turning support shaft 41 to the first turning support shaft 31 side. And the seesaw structure provided with the connection rotation piece 43 projected on the opposite side to the 1st rotation support shaft 31 is provided. Further, the connecting piece 43T protrudes from the distal end portion of the connecting rotating piece 43 away from the second rotating support shaft 41 toward the rear end wall 21X (toward the back side of the paper in FIGS. 5 to 8). ing. In addition, a torsion coil spring 46 is provided between the release holding lever 40 and the housing 21 (see FIG. 4), and the release holding lever 40 operates within the movable range by the elastic force of the torsion coil spring 46. The tip of the moving piece 42 is biased to a standby position (position shown in FIGS. 5 and 6) 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 between the movable region at the tip of the action rotating 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 (shown in FIG. 6). In the state of being arranged at the position), the distal end portion of the action rotating piece 42 is arranged at a position deviating from the interference region to the rotation center side of the ratchet gear 26. While the release holding lever 40 rotates to the lock release position (position moved in the clockwise direction from FIG. 6) on the opposite side to the standby position in the rotatable range, the distal end portion of the action rotation piece 42 The jumping contact surface 45 facing the front side in the rotation direction presses the rotation interference portion 33 in the direction away from the ratchet gear 26, and the rotation interference portion 33 is closer to the outermost end disposed outside the interference region. The ratchet lever 30 is rotated to the ratchet invalid position (position shown in FIG. 7).

  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. The ratchet lever 30 receives a positive urging force from the ratchet gear 26 that rotates in the opening direction H2 via the rotation interference unit 33, so that the ratchet in the middle between the ratchet invalid position and the ratchet effective position is intermediate. When moved to the invalid position, the tip abutting surface 44 abuts on the ratchet lever 30 (see FIG. 8), and the ratchet lever 30 and the release holding lever are between the first and second rotation support shafts 31 and 41. 40 is held in a stretched state. As a result, the ratchet lever 30 is held at the ratchet invalid position, and the unlocked state is maintained.

  As shown in FIG. 4, the movable region of the connecting piece 43 </ b> T protruding from the tip of the connecting rotation piece 43 is formed on the wall portion (the rear end wall 21 </ b> X and the rear side metal plate 60) constituting the rear end face 21 </ b> R of the housing 21. An operation hole 21 </ b> W is formed in a portion opposite to. The operation hole 21 </ b> W has an arc shape centered on the second rotation support shaft 41. The connection piece 43T of the release holding lever 40 is passed through the operation hole 21W and protrudes from the rear end face 21R of the housing 21. The release holding lever 40 biased by the torsion coil spring 46 is positioned at the standby position (position shown in FIGS. 5 and 6) when the connecting piece 43T comes into contact with one end of the operation hole 21W.

  Further, a support hole 21B that supports the rear end portion of the second rotation support shaft 41 is formed through the rear end wall 21X of the housing 21 at a side position of the operation hole 21W. A support hole 60A is formed through the rear sheet metal 60 to be coaxial with the support hole 21B. And the relay lever 51 is rotatably supported by the support pin 51J supported by the support hole 60A.

  The relay lever 51 includes a first rotating piece 51A that protrudes from the support pin 51J toward the first rotating support shaft 31 and a second rotating piece 51B that protrudes on the opposite side of the first rotating piece 51A. It has a seesaw structure. Further, the wire connecting piece 51C protrudes from the upper edge portion of the second rotating piece 51B so as to be separated from the rear end face 21R. The tip of the wire 53 (see FIG. 1) connected to the wire connecting piece 51C is connected to a lock release operation unit (not shown) provided on the indoor side of the shutter curtain 15. Alternatively, it is hung from the wire connecting piece 51C to a position where the pulling operation on the indoor side of the shutter curtain 15 is easy.

  In addition, a torsion coil spring 52 is provided between the relay lever 51 and the rear end surface 21R, and the relay lever 51 has an elastic force of the torsion coil spring 52. The tip is biased in a direction approaching the rotation center of the ratchet gear 26. That is, the relay lever 51 is always disposed at the origin position where the tip of the second rotating piece 51B is located at the end of the operation hole 21W on the side away from the support shaft 11. When the wire 53 is pulled so as to bring the second rotating piece 51B closer to the support shaft 11 by the operation of the unlocking operation unit or the direct operation of the wire 53, the tip of the second rotating piece 51B is moved in the process. The connecting piece 43T of the release holding lever 40 is pressed. As a result, the release holding lever 40 rotates from the standby position to the lock release position. The rear sheet metal 60 is provided with a positioning piece 60B formed by cutting and raising the side portion of the support hole 60A rearward, and the relay lever is brought into contact with the positioning piece 60B and the first rotating piece 51A. 51 is positioned at the origin position.

  This completes the description of the configuration of the shutter locking device 20 of the present embodiment. Next, the function and effect of the shutter locking device 20 will be described. In the shutter locking device 20 of the present embodiment, when the shutter curtain 15 is closed and the ratchet gear 26 receives the torque in the closing direction H1, the friction of the sliding contact between the ratchet gear 26 and the ratchet sliding contact member 80 causes The ratchet lever 30 that can rotate integrally with the ratchet sliding contact member 80 is biased to a ratchet invalid position that cannot be locked to the ratchet gear 26. Thus, as shown in FIG. 5, 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 is closed to an arbitrary position. Can do. 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 ratchet gear 26 receives the torque in the opening direction H2 by the winding shaft 12 biased in the winding direction of the shutter curtain 15 along with stopping the closing operation of the shutter curtain 15, the ratchet gear 26 and the ratchet The ratchet lever 30 is urged to a ratchet effective position that can be locked to the ratchet gear 26 by friction of sliding contact with the sliding contact member 80. As a result, as shown in FIG. 6, the ratchet lever 30 can be locked to the ratchet gear 26 and locked so as not to open the shutter curtain 15 at an arbitrary position. When releasing the lock and opening the shutter curtain 15, for example, an unlock operation unit (not shown) on the indoor side of the shutter curtain 15 is operated. At this time, once the lock release operation unit is operated, the release holding lever 40 rotates from the standby position (position shown in FIG. 6) to the lock release position (position shown in FIG. 7). The ratchet lever 30 is moved from the ratchet effective position to the 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 ratchet invalid position nearer to the end that is out of the interference area with the release holding lever 40. Then, when the shutter curtain 15 is opened, the ratchet lever 30 is moved from the ratchet invalid position near the end by the friction between the ratchet gear 26 that rotates in the opening direction H2 and the ratchet sliding contact member 80. Move to the ratchet invalid position in the middle of the effective position. Then, the rotation interference portion 33 of the ratchet lever 30 comes into contact with the front end abutting surface 44 of the release holding lever 40 arranged at the lock release position, and the first and second rotations as shown in FIG. The ratchet lever 30 and the release holding lever 40 are held in a tensioned state between the support shafts 31 and 41. 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, the ratchet lever 30 is moved from the intermediate ratchet invalid position to the extreme ratchet invalid position by the friction between the ratchet gear 26 that rotates in the closing direction H <b> 1 in accordance with the closing operation of the shutter curtain 15 and the ratchet sliding contact member 80. And move 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 (see FIG. 5).

  Further, the shutter locking device 20 of the present embodiment can be attached to the shutter winding device 10 as follows. That is, with the front side end face 21F of the housing 21 facing the one end face of the take-up shaft 12, the support shaft 11 is inserted into the shaft insertion hole 21A and penetrates the cylindrical drum 13 constituting the one end face of the take-up shaft 12. The connecting protrusion 26B of the ratchet gear 26 protruding from the front end surface 21F of the housing 21 is inserted into the uneven engagement hole 13C1 and engaged with the uneven. In the uneven engagement state, the bolt insertion holes 22B and 22B formed through the fixing pieces 22 and 22 of the housing 21 and the mounting hole 11A that penetrates the support shaft 11 in the radial direction are aligned with each other, and the bolt N3 And a nut (not shown) is fastened to the tip of the bolt N3. As a result, the shutter locking device 20 is connected between the winding shaft 12 and the support shaft 11, and the ratchet gear 26 is connected to the winding shaft 12 so as to be integrally rotatable.

  As described above, according to the shutter locking device 20 of the present embodiment, a part of the sheet metal constituting the ratchet gear 26 is bent and formed to form the connection protrusion 26B, and the connection protrusion 26B is formed by pressing a thin plate. (For example, a deep-drawn molded product) or a cylindrical drum 13 that is an aluminum die-cast molded product can be engaged with the concave and convex portions. Since the sheet metal constituting the ratchet gear 26 is usually stronger than the cylindrical drum 13, the insufficient strength of the connecting projection 26B can be solved. Here, the concave / convex engaging hole 13C1 that engages with the connecting protrusion 26B is provided in the cylindrical drum 13. Compared with the case where the connecting protruding piece is bent directly from the cylindrical drum 13, the present embodiment is different. Since it is easier to ensure the strength when the concave and convex engaging hole 13C1 is provided in the cylindrical drum 13, there is no need to attach an attachment to the cylindrical drum 13 separately. Thereby, it becomes possible to eliminate the insufficient strength of the connecting protrusion while suppressing an increase in the number of parts.

[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 above embodiment, the shutter locking device 20 is fixed to the support shaft 11 and the support shaft 11 is fixed to the mounting bases (not shown) fixed to the left and right side walls of the shutter case. Although it was necessary, it may be configured to be able to fix these at once.

  As shown in FIG. 9, the mounting base 90 is formed by bending a sheet metal at a right angle, for example, a U-shaped support recess 91 having an open upper surface and both axial side surfaces of the support shaft 11, and And three laying plates 92 projecting from each side of the support recess 91 toward the side at right angles. The mounting base 90 has each laying plate 92 fixed to the both left and right side walls of the shutter case (not shown) or the wall surface of the housing by screws, and receives the end of the support shaft 11 inside the support recess 91. To support.

  As shown in FIG. 10, bolt insertion holes 91 </ b> C and 91 </ b> C are formed through the pair of opposed side walls 91 </ b> B and 91 </ b> B that stand up at right angles from the bottom wall 91 </ b> A in the support recess 91. And the fixed piece arrange | positioned coaxially in the state which pinched | interposed the opposing side walls 91B and 91B of the attachment base 90 between the fixed pieces 22 and 22 with which the shutter locking device 20 was equipped, and the outer peripheral surface of the support shaft 11. A common bolt N3 is inserted into the 22 bolt insertion holes 22B and 22B, the bolt insertion holes 91C and 91C of the mounting base 90, and the mounting hole 11A passing through the support shaft 11 in the radial direction, and the tip of the bolt N3 A nut M1 is fastened to the nut.

  With such a configuration, the fixing of the support shaft 11 to the mounting base 90 and the fixing of the shutter lock device 20 to the support shaft 11 can be performed by the common bolt N3 and nut M1, so the number of parts can be reduced. In addition, the work can be reduced.

  (2) In the above embodiment, the housing 21 of the shutter locking device 20 is fixed to the support shaft 11. However, the housing 21 may be fixed to one side wall of the shutter case or the wall surface of the residence. Further, the shutter locking device 20 does not need to include the housing 21, and components mounted on the housing 21 such as the ratchet gear 26, the ratchet lever 30, the release holding lever 40, and the relay lever 51 are mounted in a flat plate shape. The mounting plate may be fixed to the side wall of the shutter case or the wall surface of the house.

  (3) In the above-described embodiment, the relay lever 51 is rotated by transmitting the operation force for the unlocking operation unit to the relay lever 51 via the wire 53 or by directly pulling the wire 53. However, for example, the relay lever 51 may be rotated by the power of an actuator such as a motor. At this time, the actuator may be attached to the support shaft 11 so as to be aligned coaxially with the shutter locking device 20, and the actuator may be remotely operated by a switch arranged indoors. The actuator is more preferably dimensioned to be disposed inside the shutter curtain 15 which is wound around the winding shaft 12 and has a cylindrical shape.

  (4) In the above-described embodiment, the connecting protrusion 26B bent and raised from the ratchet gear 26 has a protruding piece shape, but may have an axial shape.

  (5) In the above embodiment, the plurality of connecting protrusions 26B are provided at equal intervals, but may be provided at unequal intervals.

  (6) In the above embodiment, the connecting protrusion 26B is bent and raised from the inner peripheral edge of the shaft insertion hole 26A in the ratchet gear 26. Of the sheet metal constituting the ratchet gear 26, The connecting protrusion 26B may be formed by cutting and raising a wall portion at an intermediate portion between the peripheral edge and the outer peripheral edge on which the locking teeth 26T are formed.

  (7) Moreover, in the said embodiment, although the thing of the structure which fixed the cylindrical drum 13 to the edge part of winding roll 12D was illustrated as an example of the shutter winding apparatus 10, the shutter winding apparatus of structures other than this was illustrated. However, the shutter locking device 20 of the present invention may be attached and used. For example, a shutter winder having a “cage-shaped structure” winding core member in which rotating disks arranged at both ends (and an intermediate part) of the support shaft 11 are connected by a plurality of strip-shaped metal plates. The apparatus may be used with the shutter lock device 20 of the present invention attached thereto.

11 Support shaft 12 Winding shaft (winding core member)
13 Cylindrical drum 13C1 Concavity and convexity engagement hole 15 Shutter curtain 20 Shutter lock device 26 Ratchet gear 26A Shaft insertion hole 26B Connection protrusion

Claims (3)

A support shaft that is coaxially disposed with the winding core member of the shutter curtain and protrudes from the end of the winding core member passes through the center, and is integrated with a cylindrical drum that is fixed to the end of the winding core member In a shutter locking device that includes a ratchet gear that is rotatably coupled, and locks the rotation of the ratchet gear so that the shutter curtain can be held at an arbitrary opening and closing position.
A connecting protrusion for connecting the ratchet gear and the cylindrical drum so as to be integrally rotatable is formed integrally with the ratchet gear, and the connecting protrusion can be engaged with the cylindrical drum in an uneven manner. Locking device.   The connection protrusion is formed by bending and raising a part of a sheet metal constituting the ratchet gear, and provided at a plurality of positions equally dividing the inner peripheral edge of the shaft insertion hole through which the support shaft passes in the circumferential direction. The shutter locking device according to claim 1.   The shutter locking device according to claim 1, wherein the connecting protrusion has a flat protrusion shape in a radial direction of the ratchet gear.

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