JP2013167084A - Shutter latch device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shutter latch device capable of keeping a supporting shaft and a ratchet wheel in their centering states when fixing a supporting base to the supporting shaft.SOLUTION: A shutter latch device 20 which is assembled on a shutter device 10 having a supporting shaft 11 for rotatably supporting a cylindrical winding roll 12D, comprises: a mounting member 14 fitted and fixed to the inside of one end of the winding roll 12D; a housing 21 non-rotatably fixed to one end of the supporting shaft 11; a ratchet wheel 26 rotatably connected to the housing 21 and fixed to the mounting member 14 in an integrally rotatable manner; and a ratchet lever 30 turnably supported by the housing 26 to constitute a latch mechanism together with the ratchet wheel 26.

Description

  The present invention relates to a shutter latch device that is assembled to a shutter device in which a cylindrical winding roll capable of winding a shutter curtain is rotatably supported by a support shaft.

  As a conventional shutter latch device of this type, there is known one in which a ratchet wheel that can rotate integrally with a winding roll is rotatably supported on a support base that is fixed so as not to rotate with respect to a support shaft. Specifically, the support base has an annular structure through which the support shaft is inserted, and includes a pair of base fixing pieces that protrude in the axial direction from the inner edge portion and sandwich the support shaft in the radial direction. The bolt is passed through the base fixing piece and the support shaft, and the tip of the bolt is fastened to the screw hole to fix the bolt to the support shaft. In addition, the winding roll and the ratchet wheel are connected so as to be integrally rotatable by inserting a plurality of connecting protrusions protruding from the drum at one end of the winding roll into a plurality of connecting holes formed through the ratchet wheel. (For example, see Patent Document 1).

JP 2010-242292 (paragraph [0036], FIG. 6)

  By the way, in the above-described conventional shutter latch device, since there is a clearance (play) between the connecting projection piece and the connecting hole, the support base rotates with the bolt due to the friction between the bolt and the base fixing piece. The central axis of the ratchet wheel may be inclined with respect to the central axis. In order to prevent this, conventionally, it has been necessary to perform the screwing operation of the bolt while being held by a hand or a jig so that the support base does not rotate, which is troublesome.

  The present invention has been made in view of the above circumstances, and is a shutter latch device capable of maintaining a support shaft and a ratchet wheel in a centering state when fixing a support base to the support shaft. For the purpose of provision.

  In order to achieve the above object, a shutter latch device according to the invention of claim 1 is a shutter assembled to a shutter device in which a cylindrical winding roll capable of winding a shutter curtain is rotatably supported by a support shaft. A latch device, which is fixed to one end of a take-up roll and through which a support shaft passes, a support base fixed to one end of the support shaft so as not to rotate, and a support base rotatably connected to the support base A ratchet wheel fixed to the mounting member so as to be integrally rotatable, and a ratchet lever that is rotatably supported by the support base and constitutes a latch mechanism together with the ratchet wheel.

  According to a second aspect of the present invention, in the shutter latch device according to the first aspect, a plurality of first connecting portions projecting from the ratchet wheel to the mounting member side, and a plurality of first connecting portions projecting from the mounting member to the ratchet wheel side. And having a plurality of second connecting portions fixed to each other.

  According to a third aspect of the present invention, in the shutter latch device according to the second aspect, the plurality of first connecting portions are three or more gear-side connecting protrusions protruding from the inner peripheral edge of the ratchet wheel toward the mounting member. The plurality of second connecting portions are characterized in that they are three or more mounting member side connecting projecting pieces that protrude from the mounting member toward the ratchet wheel and are screwed onto the plurality of gear side connecting projecting pieces. .

  According to a fourth aspect of the present invention, in the shutter latch device of the first aspect, the ratchet wheel projects from the inner peripheral edge of the ratchet wheel toward the take-up roll and is fitted between the inner peripheral surface of the mounting member and the outer peripheral surface of the support shaft. And having a connecting cylinder portion connected to the mounting member so as to be integrally rotatable.

  According to a fifth aspect of the present invention, in the shutter latch device according to any one of the first to fourth aspects, a long hole extending in the axial direction of the support shaft is formed in the support base and penetrates the support shaft in the radial direction. The support base is fixed to the support shaft in a non-rotatable manner by inserting the eaves member through the long hole.

[Inventions of Claims 1 to 4]
The shutter latch device according to the first aspect of the present invention includes a mounting member that can be fixed to one end of a winding roll in the shutter device, and the mounting member and the ratchet wheel are fixed so as to be integrally rotatable in a centering state. ing. Therefore, if the mounting member is fixed to one end of the take-up roll, the center axis of the ratchet wheel and the center axis of the support shaft coincide with each other when the support base is fixed to the support shaft so as not to rotate. The centering state can be maintained. As a result, for example, when the support base is fixed to the support shaft with a bolt penetrating the support shaft in the radial direction, it is not necessary to hold the support base with a hand or a jig so that the support base does not rotate with the bolt. Can be eliminated.

  Here, as a structure for fixing the ratchet wheel and the mounting member, as in the invention of claim 2, a plurality of first connecting portions projecting from the ratchet wheel to the mounting member side, and projecting from the mounting member to the ratchet wheel side. A structure in which a plurality of second connecting portions are fixed to each other is possible. More specifically, as in the invention of claim 3, three or more gear side connecting projecting pieces projecting from the inner peripheral edge of the ratchet wheel to the take-up wheel side, and 3 projecting from the mounting member to the ratchet wheel side. A configuration in which two or more attachment member side connecting projection pieces are overlapped with each other and screwed is possible. Further, as another fixing structure, as in the invention of claim 4, a connecting tube portion protruding from the inner peripheral edge of the ratchet wheel to the winding roll side is provided between the inner peripheral surface of the mounting member and the outer peripheral surface of the support shaft. And can be connected to the mounting member so as to be integrally rotatable.

[Invention of claim 5]
According to the invention of claim 5, since the fixing position of the support base with respect to the support shaft can be shifted in the range of the long hole, even if the position of the winding roll varies in the axial direction of the support shaft, the variation Can be absorbed by the long holes. That is, even if the position of the take-up roll varies in the axial direction of the support shaft, the mounting member is fixed to the take-up roll so that the ratchet gear and the support shaft are centered, and the support shaft is penetrated in the radial direction. The support base can be fixed to the support shaft in a non-rotatable manner by inserting the eaves member into the long hole.

1 is a perspective view of a shutter latch device and a shutter device according to a first embodiment of the present invention. Perspective view of shutter latch device Rear view of shutter latch device Disassembled perspective view of shutter latch device Side view of connected mounting member and ratchet wheel Front view of the connected mounting member and ratchet wheel Plan view of the deployment member of the mounting member Plan view of the development member of the ratchet wheel Side sectional view of the shutter latch device with the shutter curtain closed Side sectional view of the shutter latch device with the shutter curtain open Side sectional view of the shutter latch device just after the latch release operation Side sectional view of the shutter latch device maintaining the latch release state The perspective view of the shutter latch device concerning a 2nd embodiment. Front sectional view of shutter latch device Disassembled perspective view of shutter latch device Side sectional view of shutter latch device Front sectional view showing fixing structure of support shaft and shutter latch device

[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. The shutter device 10 shown in FIG. 1 is attached to, for example, an upper edge portion of a house window (not shown), and a winding shaft 12 for winding the shutter curtain 19 is provided by a support shaft 11. It has a structure that is rotatably supported. The shutter device 10 is housed in a shutter case (not shown) for housing the wound shutter curtain 19, and the support shaft 11 is passed between the left and right side walls of the shutter case. Supported by the state.

  The take-up shaft 12 is formed by fitting and fixing a plurality of drums (not shown) inside either one of the both ends of the cylindrical take-up roll 12D and the center, and supports the centers of the plurality of drums. The shaft 11 penetrates. In addition, on the inner side of the end of the winding roll 12D where the drum is not fitted and fixed, as shown in FIG. The support shaft 11 passes through the center of the mounting member 14. That is, the take-up roll 12 </ b> D is rotatably supported by the support shaft 11 via the drum and the attachment member 14.

  The support shaft 11 has a cylindrical pipe structure and extends in both lateral directions from both end surfaces of the winding shaft 12. Both end portions of the support shaft 11 are fixed to a mounting base (not shown) in a non-rotatable manner, 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, and one end of the torsion coil spring is fixed to the drum (not shown) and the other end is fixed to the support shaft 11. Has been. Thereby, the winding shaft 12 is urged in the direction of winding the shutter curtain 19.

  The shutter curtain 19 has a known caterpillar structure formed by connecting a plurality of strip-shaped metal plates. Further, the lateral width of the shutter curtain 19 is larger than the axial length of the winding shaft 12. Then, one end portion of the shutter curtain 19 in the winding length direction is directed to the outer peripheral surface of the winding shaft 12 so that the shutter curtain 19 protrudes in both lateral directions from both end surfaces of the winding shaft 12. Is screwed to the winding shaft 12.

  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 19 that extends downward from the winding shaft 12 are maintained in engagement with the shutter rails, and the lower end of the shutter curtain 19 is manually pulled downward to wind the winding. The shutter curtain 19 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 latch device 20 for holding the shutter curtain 19 at an arbitrary opening / closing position (specifically, closing the shutter curtain 19 to an arbitrary position and latching so as not to open upward). Yes.

  As shown in FIG. 2, the shutter latch device 20 includes a device main body 29 having a built-in latch mechanism, and the mounting member 14 fitted and fixed to one end of the winding roll 12D. The ratchet wheel 26, which will be described later, constituting the latch mechanism and the winding roll 12D are coupled so as to be integrally rotatable.

  As shown in FIG. 4, the attachment member 14 includes a circular center hole 14C at the center of a main plate portion 14A having a substantially disk shape. As shown in FIG. 1, the outer peripheral surface of the main plate portion 14 </ b> A is fitted inside the open end of the winding roll 12 </ b> D, and the inner peripheral surface of the center hole 14 </ b> C is rotatably fitted to the outer peripheral surface of the support shaft 11. doing.

  The mounting member 14 includes a mounting member side connecting projection piece 15 (corresponding to the “second connecting portion” of the present invention) and a take-up roll fixing piece 16 erected at a right angle from the main plate portion 14A. The attachment member-side coupling protrusions 15 are erected from the main plate portion 14A toward the apparatus main body 29, and are provided at a plurality of positions (specifically, three locations) equally divided around the center hole 14C (see FIG. 5). On the other hand, the winding roll fixing piece 16 stands upright from the outer edge portion of the main plate portion 14 </ b> A in the direction opposite to the attachment member side connecting projection piece 15, and has a phase in the circumferential direction with respect to the attachment member side connection projection piece 15. It is provided at a plurality of shifted positions (specifically, two positions with the center hole 14C interposed).

  The attachment member 14 is formed by punching and bending a sheet metal with a press, and is a deployment member 100 shown in FIG. 7 before being bent. A boss portion 14B that rises in a cylindrical shape is formed in the peripheral portion of the center hole 14C in the deployment member 100 (see FIG. 4). Further, a plurality of pairs of slits 101, 101 extending in parallel from the position near the center hole 14C toward the outside are formed in the developing member 100, and the inner regions of the slits 101, 101 parallel to each other are cantilevered. A rectangular protruding piece 102 is formed by being separated into two. Further, screw insertion holes 15 </ b> A are formed through the tip portions of the projecting pieces 102. Each of the projecting pieces 102 is bent at a right angle along a fold line L1 of the base end portion thereof, and becomes the mounting member side connecting projecting piece 15 standing upright on the opposite side to the boss portion 14B.

  In addition, the deployable member 100 is formed with a rectangular protruding piece 103 projecting radially outward from the outer peripheral surface thereof. These protruding pieces 103 project in opposite directions with the center hole 14C interposed therebetween, and a screw hole 16A is formed at a position near the tip. The screw holes 16A are formed by burring the prepared holes penetrating the projecting pieces 103 to raise the cylindrical boss portion 16B on the same side as the boss portion 14B of the center hole 14C, and by tapping or the like on the inner peripheral surface. A female thread is formed by threading. The pair of projecting pieces 103, 103 are bent at right angles to the side opposite to the attachment member-side connecting projecting piece 15 at a fold line L2 of the base end portion thereof, and the winding is erected on the same side as the boss portion 14B. A roll fixing piece 16 is formed.

  Corresponding to the screw holes 16A formed in the winding roll fixing piece 16, a plurality of screw insertion holes (not shown) are formed penetratingly formed at positions near the end of the winding roll 12D. Then, the screw N1 (see FIG. 1) inserted through the screw insertion hole is fastened to the screw hole 16A of the winding roll fixing piece 16, so that the winding shaft (winding roll 12D) and the attachment member 14 can rotate integrally. It is fixed. Further, at least one of the plurality of screws N1 is also inserted into a screw insertion hole (not shown) provided at one end of the shutter curtain 19, and the winding roll 12D and the shutter curtain 19 are connected to the mounting member 14. It is fastened together with the screw hole 16A.

  As shown in FIG. 2, the apparatus main body 29 includes a flat disk-shaped housing 21 (corresponding to the “support base” of the present invention). 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 side end surface 21F and a rear side end surface 21R with which the support shaft 11 is orthogonal, and the front side end surface 21F is disposed to face the mounting member 14. Further, the outer diameter of the housing 21, which is also the outer diameter of the entire shutter latch device 20, is slightly smaller than the outer diameter of the winding shaft 12. When the shutter curtain 19 is wound around the winding shaft 12 and becomes cylindrical, the shutter curtain 19 is disposed inside the cylindrical shutter curtain 19.

  The wall portion constituting the rear end surface 21R of the housing 21 includes a rear end wall 21X formed integrally with the side wall 21S of the housing 21, and a rear side metal plate 25 addressed to the rear end wall 21X and fixed by screws N2. A pair of housing fixing pieces 22 and 22 are bent rearward from a position opposite to the opening edge of the rear metal plate 25 with the shaft insertion hole 21A interposed therebetween. In each of the housing fixing pieces 22, 22, a bend hole 22 </ b> C is formed in a bent portion between the main body portion of the rear sheet metal 25. Bolt insertion holes 22B and 22B are formed through the housing fixing pieces 22 and 22, respectively. These bolt insertion holes 22B, 22B have a long hole shape that is elongated in the axial direction. Then, as shown in FIG. 1, a housing 21 is formed by inserting a bolt N3 through a mounting hole 11A that penetrates the support shaft 11 in the radial direction and bolt insertion holes 22B and 22B, and tightening a tip portion of the bolt N3 to a nut (not shown). Is fixed to the support shaft 11 so as not to rotate. The bolt insertion holes 22B and 22B correspond to the “long hole” in the present invention, and the bolt N3 corresponds to the “ridge member” in the present invention.

  Here, since the bolt insertion holes 22B and 22B have a long hole shape, the fixing position of the housing 21 with respect to the support shaft 11 can be shifted within the range of the long hole. Thereby, even if a variation occurs in the position of the winding roll 12D in the axial direction of the support shaft 11, the variation can be absorbed by the bolt insertion holes 22B and 22B. That is, even if the position of the take-up roll 12D varies in the axial direction of the support shaft 11, the mounting member 14 is fitted and fixed inside the take-up roll 12D so that the ratchet wheel 26 and the support shaft 11 described later are cored. It is possible to fix the housing 21 to the support shaft 11 in a non-rotatable state by inserting the bolt N3 which is in the extended state and penetrates the mounting hole 11A of the support shaft 11 into the bolt insertion holes 22B and 22B.

  As shown in FIG. 2, the wall portion constituting the front end face 21 </ b> F of the housing 21 is a lid body 23. As shown in FIG. 4, the lid body 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 gear-side fixed protrusions 27 provided on the ratchet wheel 26 described below protrude toward the mounting member 14 through the front hole 23A.

  As shown in FIG. 4, a ratchet wheel 26 is disposed in the housing 21 coaxially with the shaft insertion hole 21 </ b> A. The ratchet wheel 26 has a disk shape and has a shaft insertion hole 26A at the center. Further, in the ratchet wheel 26, gear-side coupling protrusions 27 (corresponding to the “first coupling portion” of the present invention) are formed at a plurality of positions (for example, three locations) equally divided around the shaft insertion hole 26A. Has been. More specifically, the ratchet wheel 26 is formed by punching and bending a sheet metal with a press in the same manner as the attachment member 14, and is a deployment member 105 shown in FIG. 8 before being bent. The deployment member 105 is provided with a plurality of projecting pieces 106 projecting from the inner peripheral edge of the shaft insertion hole 26A toward the center, and each projecting piece 106 is bent at a right angle by a fold line L3 at the base end. The gear-side connecting projecting piece 27 is formed by standing up in parallel with the rotation axis direction of the ratchet wheel 26 (specifically, bending and raising the front side in FIG. 8). The gear side connecting projection piece 27 has a disc shape at the tip, and a screw hole 27A is formed through the center thereof. The screw holes 27A are burring the pilot holes formed through the projecting pieces 106 so that the cylindrical boss portions 27B protrude from the peripheral portion, and the inner peripheral surface is threaded with a tap or the like so that the female screws are formed. Formed.

  The plurality of gear-side connecting protrusions 27 protrude outside the housing 21 through the front hole 23 </ b> A of the lid body 23. And the front-end | tip part of the gear side connection protrusion 27 overlaps with the inward surface of the some attachment member side connection protrusion 15 which stood up from the attachment member 14, as shown in FIG. A screw N5 inserted through the 15 screw insertion holes 15A is fastened to a screw hole 27A formed in the gear side connecting projection piece 27. Thereby, the ratchet wheel 26 and the attachment member 14 are fixed so as to be integrally rotatable in a centering state in which the center axes thereof coincide with each other. As described above, the attachment member 14 is fitted and fixed inside the end of the take-up roll 12D, so that the ratchet wheel 26 and the take-up shaft 12 are connected so as to be integrally rotatable, and are supported by the ratchet wheel 26. The shaft 11 is fixed in a centering state in which the center axes of the shafts 11 coincide with each other. Hereinafter, the direction in which the ratchet wheel 26 rotates together with the take-up shaft 12 when the shutter curtain 19 is closed (when the shutter shaft 19 is unwound from the take-up shaft 12) is referred to as a “close direction H1”, and when the shutter curtain 19 is opened (the take-up shaft 12). The direction in which the ratchet wheel 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 wheel 26. Each of the locking teeth 26T is inclined so as to protrude toward the front side in the rotation direction when the ratchet wheel 26 is rotated in the opening direction H2. More specifically, as shown in FIG. 9, the tooth surface facing the front side when the ratchet wheel 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 wheel 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 latching tooth | gear 26T among the ratchet wheels 26 is covered with the cover body 23 (refer FIG. 3).

  As shown in FIG. 4, a center pipe 21P is provided inside the shaft insertion hole 26A of the ratchet wheel 26, and the inner peripheral surface of the ratchet wheel 26 is rotatably fitted to the outer peripheral surface of the center pipe 21P. As shown in FIG. 4, the center pipe 21 </ b> P is integrally formed with the rear end wall 21 </ b> X of the housing 21. The inside of the center pipe 21P is the above-described shaft insertion hole 21A, and the support shaft 11 is inserted there in a loosely fitted state.

  As shown in FIG. 9, 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 wheel 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 wheel 26 and are disposed, for example, at positions separated by about 60 degrees around the rotation center of the ratchet wheel 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 wheel 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 wheel 26 receives the rotational torque in the opening direction H2 in a state where the latching claw 32 is urged so as to be pressed against the locking teeth 26T (the state shown in FIG. 10), the latching claw 32 is applied. 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 wheel 26, and the rotation of the ratchet wheel 26 is prohibited. As a result, the shutter curtain 19 is latched so as not to open. As shown in FIG. 9, when the locking claw 32 is separated from the locking teeth 26T, the ratchet lever 30 can no longer be locked to the ratchet wheel 26, and the rotation of the ratchet wheel 26 is allowed.

  In order to urge the ratchet lever 30 toward the ratchet effective position (position shown in FIG. 10) that can be locked to the ratchet wheel 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 wheel 26 toward the ratchet wheel 26. A ratchet wheel 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 first rotation support shaft 31 of the ratchet lever 30 into the mounting hole of the mounting piece 84 and causes the mounting piece 84 to contact the side surface of the ratchet lever 30. In addition, the central plate portion 83 that connects the pair of elastic facing pieces 81, 81 is assembled in a state of being addressed to the outer surface of the ratchet lever 30 on the ratchet wheel 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 wheel 26 rotates in the opening direction H2, the ratchet lever 30 is urged to the ratchet effective position by friction between the ratchet sliding contact member 80 and the side surface of the ratchet wheel 26. The biasing force received by the ratchet lever 30 at this time is hereinafter referred to as “positive biasing force”. When the ratchet wheel 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 wheel 26 due to friction between the ratchet sliding contact member 80 and the side surface of the ratchet wheel 26. . While the ratchet wheel 26 continues to rotate in the closing direction H1, the ratchet lever 30 is in contact with the side wall 21S of the housing 21 and spaced from the release holding lever 40 (the position shown in FIG. 9). ).

  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 wheel 26, and as shown in FIG. 9, 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, a cantilevered connecting beam 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 page in FIGS. 9 to 12). 43T protrudes. 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. 9 and 10) closest to the rotation center of the ratchet wheel 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 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. 9). In the state of being arranged at the position), the tip 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 wheel 26. While the release holding lever 40 is rotated to the latch release position (position moved in the clockwise direction from FIG. 10) on the opposite side to the standby position in the rotatable range, at 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 wheel 26, and the rotation interference portion 33 is separated from the distal end portion of the action rotation piece 42. The ratchet lever 30 is rotated to the ratchet invalid position (see FIG. 11) closest to the end.

  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 latch release position. Then, the ratchet lever 30 receives a positive biasing force from the ratchet wheel 26 that rotates in the opening direction H2 via the rotation interference unit 33, so that the ratchet in the middle from the ratchet invalid position to the ratchet effective position. When moved to the invalid position, the tip abutting surface 44 comes into contact with the ratchet lever 30, and the ratchet lever 30 and the release holding lever 40 are stretched between the first and second rotation support shafts 31 and 41. (See FIG. 12). Accordingly, the ratchet lever 30 is held at the ratchet invalid position, and the latch release state is maintained.

  As shown in FIG. 4, the movable region of the connecting beam 43 </ b> T protruding from the tip of the connecting rotating piece 43 is formed on the wall portion (the rear end wall 21 </ b> X and the rear side metal plate 25) constituting the rear side end surface 21 </ b> R of the housing 21. An operation hole 21 </ b> W is formed in a portion opposite to. As shown in FIG. 3, the operation hole 21 </ b> W has an arc shape centered on the second rotation support shaft 41. The connection beam 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 urged by the torsion coil spring 46 is positioned at the standby position (position shown in FIGS. 9 and 10) when the connecting beam 43T comes into contact with one end of the operation hole 21W.

  In addition, a support hole 21B that supports the rear end portion of the second rotation support shaft 41 is formed at a side position of the operation hole 21W in the rear end wall 21X of the housing 21, and is directed to the rear end wall 21X. A support hole 25A is formed through the rear sheet metal 25 so as to be coaxial with the support hole 21B. And the relay lever 51 is rotatably supported by the support shaft 51J supported in the support hole 25A in a retaining state (see FIG. 4).

  The relay lever 51 includes a first rotating piece 51A that protrudes from the support shaft 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, a wire connecting piece 51C protrudes from the upper edge of the second rotating piece 51B so as to be separated from the housing 21. Further, a wire 53 (see FIG. 1) is connected to the wire connecting piece 51C via a connection tool (not shown), and the tip of the wire 53 is hung on the indoor side of the shutter curtain 19 in the shutter device 10. Or connected to a latch release operation section (not shown) provided on the indoor side of the shutter curtain 19.

  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 portion is biased in a direction approaching the rotation center of the ratchet wheel 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 latch releasing operation unit or the direct operation of the wire 53, the second rotating piece 51B is released from the release holding lever in the process. 40 connecting beams 43T are pressed. Thereby, the release holding lever 40 rotates from the standby position to the latch release position. The rear sheet metal 25 is provided with a positioning piece 25B formed by cutting and raising a side portion of the support hole 25A rearward, and the relay lever is brought into contact with the positioning piece 25B and the first rotating piece 51A. 51 is positioned at the origin position.

  This completes the description of the configuration of the shutter latch device 20 of the present embodiment. Next, the function and effect of the shutter latch device 20 will be described. In the shutter latch device 20 of the present embodiment, when the shutter curtain 19 is closed and the ratchet wheel 26 receives torque in the closing direction H1, the ratchet is caused by friction between the ratchet wheel 26 and the ratchet sliding contact member 80. The ratchet lever 30 that can rotate integrally with the slidable contact member 80 is biased to the endmost ratchet invalid position that cannot be locked to the ratchet wheel 26. As a result, as shown in FIG. 9, while the shutter curtain 19 is being closed, the ratchet lever 30 is not separated from the ratchet wheel 26 and locked, and the shutter curtain 19 is closed to an arbitrary position. Can do. Furthermore, since the ratchet lever 30 and the ratchet wheel 26 are not in contact with each other while the shutter curtain 19 is being closed, the silence can be improved.

  On the other hand, when the ratchet wheel 26 receives the torque in the opening direction H2 by the winding shaft 12 biased in the winding direction of the shutter curtain 19 along with stopping the closing operation of the shutter curtain 19, the ratchet wheel 26 and the ratchet The ratchet lever 30 is biased to the ratchet effective position that can be locked to the ratchet wheel 26 by the friction of the sliding contact with the sliding contact member 80. Accordingly, as shown in FIG. 10, the ratchet lever 30 can be latched to the ratchet wheel 26 and latched so as not to open the shutter curtain 19 at an arbitrary position. To release the latch and open the shutter curtain 19, for example, the relay release 51 is tilted from the origin position by directly operating a latch release operation unit (not shown) or the wire 53 on the indoor side of the shutter curtain 19. Once this operation is performed, in the process, the release holding lever 40 rotates from the standby position (position shown in FIG. 10) to the latch release position (position shown in FIG. 11), and the ratchet lever 30 is moved. Move from the valid position to the ratchet invalid position. As a result, the shutter curtain 19 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 that is farther from the release holding lever 40. When the shutter curtain 19 is opened, the ratchet lever 30 is moved from the ratchet invalid position closer to the end by the friction between the ratchet wheel 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 tip abutting surface 44 of the release holding lever 40 disposed at the latch 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. As a result, the ratchet lever 30 is held at the ratchet invalid position and the latch release state is maintained, so that the shutter curtain 19 can be automatically wound. That is, the shutter curtain 19 can be automatically opened.

  That is, since the latch release state is maintained by a single operation on the latch release operation unit or the wire 53, there is no need to continue the latch release operation by the latch release operation unit or the like. That is, the shutter curtain 19 can be opened only by the urging force applied to the winding shaft 12 once the latch release operation is performed. Further, in order to cancel the latch release state, it is only necessary to close the shutter curtain 19. 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 wheel 26 that rotates in the closing direction H1 and the ratchet sliding contact member 80 in accordance with the closing operation of the shutter curtain 19. 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.

  The shutter latch device 20 of the present embodiment can be assembled to the shutter device 10 in the following procedure. First, the attachment member 14 and the apparatus main body 29 are fixed integrally. That is, the three attachment member side connection protrusions 15 protruding from the attachment member 14 and the three gear side connection protrusions 27 protruding from the ratchet wheel 26 built in the apparatus main body 29 are overlapped with each other by screws N5. Fix it. Thereby, the attachment member 14, the housing 21, and the ratchet wheel 26 are fixed in a centering state in which the respective center axes coincide with each other.

  Next, the support shaft 11 is inserted into the center (center hole 14C and shaft insertion hole 21A) of the plurality of drums and the shutter latch device 20 provided inside the winding roll 12D, and the attachment member 14 is connected to one end of the winding roll 12D. Fit inside. Next, a screw insertion hole (not shown) formed through the take-up roll 12D and a screw hole 16A formed in the take-up roll fixing piece 16 of the attachment member 14 are aligned with each other, thereby taking up the take-up roll 12D. The screw N1 passed through the screw insertion hole is tightened in the screw hole 16A. As a result, the center axes of the attachment member 14, the housing 21, and the ratchet wheel 26 are fixed in a centering state that coincides with the center axis of the support shaft 11.

  Next, the bolt N3 (see FIG. 1) is inserted through the bolt insertion holes 22B and 22B formed in the housing fixing pieces 22 and 22 of the apparatus main body 29 and the mounting hole 11A penetrating the support shaft 11 in the radial direction. Tighten the tip of the bolt N3 to a nut (not shown). Thereby, the shutter latch device 20 is connected between the winding roll 12D and the support shaft 11, and the ratchet wheel 26 is connected to the winding shaft 12 so as to be integrally rotatable.

  Here, when the bolt N3 is tightened, the torque about the bolt N3 may be applied to the housing 21 due to friction between the bolt N3 and the housing fixing piece 22. On the other hand, the shutter latch device 20 of the present embodiment includes an attachment member 14 that can be fitted and fixed to one inner side of the winding roll 12D in the shutter device 10, and the attachment member 14 and the ratchet wheel 26 are the core. It is fixed so that it can rotate integrally in the extended state. Therefore, if the mounting member 14 is fitted and fixed to one end of the winding roll 12D, the ratchet wheel 26 and the support shaft 11 are centered when the housing 21 is fixed to the support shaft 11 so as not to rotate. Can be maintained in a state. As a result, when the housing 21 is fixed with the bolt N3 penetrating the support shaft 11 in the radial direction, it is not necessary to hold the housing 21 with a hand or a jig so that the housing 21 does not rotate with the bolt N3. Can be eliminated.

  Further, since the bolt insertion holes 22B and 22B have a long hole shape and the fixing position of the housing 21 with respect to the support shaft 11 can be shifted within the range of the long holes, the winding roll 12D in the axial direction of the support shaft 11 Even if there is a variation in the position, the variation can be absorbed by the bolt insertion holes 22B and 22B. That is, even if the position of the winding roll 12D varies in the axial direction of the support shaft 11, the mounting member 14 is fitted and fixed inside the winding roll 12D, and the ratchet wheel 26 and the support shaft 11 are centered. The housing 21 can be non-rotatably fixed to the support shaft 11 by a bolt N3 that penetrates the support shaft 11 in the radial direction.

[Second Embodiment]
Hereinafter, a second embodiment of the present invention will be described with reference to FIGS. In the following description, only the configuration that is different from the first embodiment will be described, and the same configuration is denoted by the same reference numeral, and redundant description is omitted.

  The shutter latch device 20 of the present embodiment is integrally provided with a device main body 29 and a drum 13 (corresponding to the “mounting member” of the present invention). The drum 13 is fitted inside the one end of the winding roll 12D, and supports the winding roll 12D so as to be rotatable with respect to the support shaft 11 together with another drum (not shown) fitted inside the winding roll 12D. doing. As shown in FIG. 14, the drum 13 includes an outer cylindrical body 13X that fits to the inner peripheral surface of the end of the winding roll 12D, and an inner cylindrical body 13Y that is disposed on the inner coaxial side of the outer cylindrical body 13X. One end portions of the inner cylindrical body 13Y and the outer cylindrical body 13X are connected by an annular closing plate 13Z. The inner cylinder 13Y has a center hole 13C inside, and a plurality of screw holes for fixing the take-up roll 12D and the drum 13 with screws N1 are provided at predetermined positions of the drum 13 in the outer cylinder 13X. 13A is formed. Further, screw insertion holes 13B are formed through the closing plate 13Z at a plurality of positions (for example, three locations) equally divided around the center hole 13C.

  As shown in FIG. 15, a ratchet wheel 26 and a relay disk 70 are disposed coaxially with the shaft insertion hole 21 </ b> A (support shaft 11) inside the housing 21. The ratchet wheel 26 and the relay disk 70 are formed in a disk shape having substantially the same diameter, and shaft insertion holes 26A and 70A are formed through the respective centers. The relay disk 70 is disposed on the lid body 23 side of the ratchet wheel 26 and faces the drum 13 through the front hole 23 </ b> A of the lid body 23.

  On the inner peripheral surfaces of the relay disk 70 and the ratchet wheel 26, a plurality of locking recesses 26C and 70C are formed at positions where the shaft insertion holes 26A and 70A are equally divided in the circumferential direction. The locking recesses 26C and 70C each have an arc shape extending in the circumferential direction. A common connecting sleeve 24 is fitted into the shaft insertion holes 26 </ b> A and 70 </ b> A of the ratchet wheel 26 and the relay disk 70. The connecting sleeve 24 has a cylindrical shape, and locking projections 24A are formed at a plurality of positions (for example, three locations) whose outer peripheral surface is equally divided in the circumferential direction. The locking projections 24A are curved in an arc shape corresponding to the locking recesses 26C and 70C, and the locking projections 24A are provided with locking recesses 26C and 70C provided in the ratchet wheel 26 and the relay disc 70, respectively. The relay disk 70, the ratchet wheel 26, and the connecting sleeve 24 are connected so as to be integrally rotatable by engaging with the concave and convex portions.

  Further, the connecting sleeve 24 protrudes from the housing 21 through the front hole 23A of the lid 23, and the protruding portion is fitted inside the inner cylinder 13Y of the drum 13 (center hole 13C). The connection sleeve 24 is made of a resin having excellent slidability, and is fitted between the inner peripheral surface of the center hole 13C and the outer peripheral surface of the support shaft 11 to form a bearing.

  The connecting sleeve 24 has a small diameter at a portion protruding to the outside of the housing 21 with respect to a portion arranged inside the housing 21, and the portion arranged inside the housing 21 also has a step portion in the middle thereof. Thus, the portion on the lid 23 side has a small diameter. The locking projection 24A is formed on the outer peripheral surface on the lid 23 side. The relay disk 70 and the ratchet wheel 26 are prevented from coming off from the connection sleeve 24 by the step portion provided at the intermediate portion of the outer peripheral surface of the connection sleeve 24 and the lid body 23. Here, at least one of the plurality of locking projections 24A extends to a position protruding from the front end face 21F of the housing 21, and is formed at the intersection of the inner cylinder 13Y of the drum 13 and the closing plate 13Z. The engaging hole 13D is engaged with the concave and convex portions. The connecting sleeve 24 corresponds to the “connecting cylinder portion” of the present invention.

  As shown in FIG. 14, a center pipe 21P is provided inside the connection sleeve 24, and the connection sleeve 24 is rotatably fitted to the outer peripheral surface of the center pipe 21P. In other words, the connecting sleeve 24 is fitted between the ratchet wheel 26 and the shaft insertion holes 26A and 70A of the relay disk 70 and the outer peripheral surface of the center pipe 21P to form a bearing.

  A plurality of projecting pieces 72 are erected from the inner edge portion of the shaft insertion hole 70 </ b> A formed in the relay disk 70. The protruding pieces 72 are formed by bending a rectangular protruding piece extending from the inner peripheral edge of the shaft insertion hole 70A toward the center in a deployed state, out of the sheet metal constituting the connecting disk 70, at a base end portion thereof. The plate 70 is erected in parallel with the rotation axis direction of the plate 70, and has a flat plate shape in the radial direction of the relay disc 70. The protruding piece 72 protrudes toward the ratchet wheel 26 from a plurality of positions obtained by equally dividing the shaft insertion hole 70 </ b> A in the circumferential direction, and the tip thereof is abutted against the edge of the shaft insertion hole 26 </ b> A in the ratchet wheel 26. ing. Thus, a space S1 corresponding to the length of the protruding piece 72 is secured between the ratchet wheel 26 and the relay disk 70 in the rotation axis direction.

  A screw hole 74 is formed through the relay disk 70 around the shaft insertion hole 26 </ b> A so as to correspond to the screw insertion hole 13 </ b> B formed in the drum 13. In other words, the screw holes 74 are formed through a plurality of positions (for example, three locations) equally divided around the shaft insertion hole 70A. The screw N4 inserted into the screw insertion hole 13B from the inside of the drum 13 is fastened to the screw hole 74 of the relay disk 70, and the drum 13 and the relay disk 70 are fixed so as to be integrally rotatable. That is, the ratchet wheel 26 and the take-up roll 12D are connected to each other via the drum 13, the relay disk 70, and the connecting sleeve 24 so as to be integrally rotatable. Note that the outer edge of the relay disc 70 outside the screw hole 74 is covered with the lid 23, so that the ratchet wheel 26 and the relay disc 70 are prevented from coming off from the connecting sleeve 24 as described above. .

  In addition, a plurality of abutting pieces 73 projecting toward the drum 13 are formed on the relay disk 70. The abutting piece 73 is formed at a plurality of positions obtained by equally dividing the relay disk 70 in the circumferential direction, and is formed by bending a part of a sheet metal constituting the relay disk 70. That is, the projecting piece projecting outward in the radial direction of the relay disk 70 in the unfolded state is formed by bending at a right angle at the base end portion. Each abutting piece 73 projects from the front hole 23 </ b> A of the lid body 23 to the outside of the housing 21, and the tip is abutted against the closing plate 13 </ b> Z of the drum 13. Thereby, a predetermined gap is secured between the lid body 23 and the closing plate 13Z, and when the winding shaft 12 rotates, friction is generated between the lid body 23 of the housing 21 and the drum 13. It is preventing.

  As shown in FIG. 16, an operation hole 21 </ b> W is formed in a portion of the wall portion constituting the rear end surface 21 </ b> R of the housing 21 that faces 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 the long side of the operation hole 21W in the rear end surface 21R of the housing 21, the support protrusion 50 protrudes rearward, and the relay lever 54 is tiltably supported by the support protrusion 50. (See FIG. 13).

  The relay lever 54 is formed by bending a sheet metal into a crank shape, and is rotatably attached to the shaft 54 </ b> J in a state where the first rotating piece 54 </ b> A on one end side of the bent portion is superimposed on the support protrusion 50. Yes. Then, the tip of the first rotating piece 54A is inserted into the housing 21 from the operation hole 21W (see FIG. 14), and reciprocates in the longitudinal direction of the operation hole 21W. The second turning piece 54B on the other end side of the bent portion of the relay lever 54 is disposed on the outer edge side of the rear end face 21R of the housing 21 so as to avoid the support shaft 11, and the second turning piece 54B. A wire 53 is connected to the tip of the wire through a connector (not shown) (see FIG. 13).

  A hook 54Y is formed at a proximal end portion of the second rotating piece 54B of the relay lever 54 near the bent portion. Correspondingly, a hook 54X is also formed on the rear end surface 21R of the housing 21, and a tension coil spring 55 is bridged between the hooks 54X and 54Y (see FIG. 14). Thereby, the relay lever 54 is urged in a direction in which the second rotating piece 54B approaches the rear end surface 21R of the housing 21, and the distal end portion of the first rotating piece 54A is supported by the support shaft 11 in the operation hole 21W. The relay lever 54 is disposed at the origin position located at the end portion on the side away from the center. When the wire 53 is pulled to the side away from the rear end face 21R by the operation of the latch release operation part or the direct operation of the wire 53, the tip of the first turning piece 51A becomes the support shaft. 11, the tip of the first turning piece 54 </ b> A presses the connecting turning piece 43 of the release holding lever 40 in the process. Thereby, the release holding lever 40 rotates from the standby position to the latch release position.

  This completes the description of the configuration of the shutter latch device 20 of the present embodiment. The operation of the shutter latch device 20 that accompanies opening and closing of the shutter curtain 19 is the same as that in the first embodiment.

  The shutter latch device 20 of the present embodiment can be assembled to the shutter device 10 in the following procedure. First, the drum 13 and the apparatus main body 29 are fixed integrally. That is, the connecting sleeve 24 protruding from the front surface of the apparatus main body 29 is inserted into the center hole 13 </ b> C of the drum 13. Next, a plurality of screws N4 inserted through the screw insertion holes 13B of the closing plate 13Z in a state where the butting pieces 73 protruding from the relay disc 70 are in contact with the closing plate 13Z of the drum 13 are connected to the relay disc 70. The screw hole 74 is fastened and fixed. Thereby, the drum 13, the housing 21, and the ratchet wheel 26 are fixed in a centering state in which the respective center axes coincide with each other.

  Next, the support shaft 11 of the shutter device 10 is inserted into the plurality of drums (not shown) provided inside the winding roll 12D and the center of the shutter latch device 20 (center hole 13C and shaft insertion hole 21A), and the drum 13 (Specifically, the outer cylindrical body 13X) is fitted inside one end of the winding roll 12D in the winding shaft 12. Next, a screw insertion hole (not shown) formed through the winding roll 12D and a screw hole 13A formed in the outer cylindrical body 13X of the drum 13 are aligned with each other so that the screw insertion hole of the winding roll 12D is aligned. The screw N1 passed through is tightened in the screw hole 16A. Accordingly, the center axes of the drum 13, the housing 21, and the ratchet wheel 26 are fixed in a centering state that coincides with the center axis of the support shaft 11.

  Next, the bolt N3 (see FIG. 1) is inserted into the bolt insertion holes 22B and 22B formed in the housing fixing pieces 22 and 22 of the apparatus main body 29 and the mounting hole 11A (see FIG. 1) penetrating the support shaft 11 in the radial direction. ) And tighten the tip of the bolt N3 to a nut (not shown). Thereby, the shutter latch device 20 is connected between the winding roll 12D and the support shaft 11, and the ratchet wheel 26 is connected to the winding shaft 12 so as to be integrally rotatable.

  Also according to the present embodiment, the same effects as those of the first embodiment can be obtained. In other words, the shutter latch device 20 of the present embodiment includes a drum 13 that can be fitted and fixed to one inner side of the winding roll 12D in the shutter device 10, and the drum 13 and the ratchet wheel 26 have an inner periphery thereof. A common connecting sleeve 24 fitted to the surface is fixed so as to be integrally rotatable in a centering state. Therefore, if the drum 13 is fitted and fixed to one end of the take-up roll 12D, the ratchet wheel 26 and the support shaft 11 are centered when the housing 21 is fixed to the support shaft 11 in a non-rotatable manner. Can be maintained. As a result, when the housing 21 is fixed with the bolt N3 penetrating the support shaft 11 in the radial direction, it is not necessary to hold the housing 21 with a hand or a jig so that the housing 21 does not rotate with the bolt N3. Can be eliminated.

[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 first and second embodiments, the housing 21 is fixed to the support shaft 11 and both ends of the support shaft 11 are fixed to mounting bases (not shown) fixed to the left and right side walls of the shutter case. However, it is also possible to adopt a configuration in which these can be fixed at a time.

  Specifically, as shown in FIG. 17, the mounting base 90 is formed by, for example, bending a sheet metal at a right angle, and the upper surface and both side surfaces of the support shaft 11 in the axial direction (direction orthogonal to the paper surface in FIG. 17). The U-shaped support recessed portion 91 is opened, and a plurality of laying plates 92 projecting from each side of the support recessed portion 91 at right angles to each other. 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.

  Bolt insertion holes 91 </ b> C and 91 </ b> C are formed through the pair of opposing 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 in the state which pinched | interposed the opposing side walls 91B and 91B of the attachment base 90 between the housing fixing pieces 22 and 22 (refer FIG.2 and FIG.13) with which the shutter latch apparatus 20 was equipped, and the outer peripheral surface of the support shaft 11, The bolts common to the bolt insertion holes 22B and 22B of the housing fixing pieces 22 and 22 arranged on the same axis, the bolt insertion holes 91C and 91C of the mounting base 90, and the mounting hole 11A penetrating the support shaft 11 in the radial direction. The support shaft 11 and the housing 21 are both fixed to the mounting base 91 by inserting N3 and tightening the nut M1 at the tip thereof.

  With such a configuration, the fixing of the support shaft 11 to the mounting base 90 and the fixing of the housing 21 to the support shaft 11 can be performed with the common bolt N3 and the nut M1, and these fixing operations are performed simultaneously. Therefore, the number of parts and the work can be reduced.

  (2) In the first and second embodiments, the housing 21 of the shutter latch device 20 is fixed to the support shaft 11. However, the housing 21 is fixed to one side wall of a shutter case (not shown) or the wall surface of a residence. Also good. The shutter latch device 20 may not include the housing 21. Parts such as the ratchet wheel 26, the ratchet lever 30, the release holding lever 40, and the relay lever 51 are assembled to the sheet metal member, and the sheet metal member is used as the shutter. It is good also as being fixable to the side wall of a case, or the wall surface of a residence.

  (3) In the first and second embodiments, the relay lever 51 is rotated by pulling the wire 53 manually. For example, the relay lever 51 can be rotated by the power of an actuator such as a motor. It is good. At this time, the actuator may be attached to the support shaft 11 so as to be coaxially aligned with the shutter latch device 20, and the actuator may be remotely operated by a switch disposed on the indoor side of the window or the shutter curtain 19. It is more preferable that the actuator has an outer dimension that can be disposed inside the shutter curtain 19 that is wound around the winding shaft 12 and has a cylindrical shape.

  (4) In the second embodiment, the connecting sleeve 24 is configured as a separate part from the ratchet wheel 26, but may be formed integrally with the ratchet wheel 26.

  (5) In the first and second embodiments, the mounting member 14 and the drum 13 constituting a part of the shutter latch device 20 are configured to be fixed to the take-up roll 12D by the screw N1. Is not limited to a screw, and may be fixed by rivets, welding, press-fitting, an adhesive, or the like.

  (6) In the first and second embodiments, the housing 21 and the support shaft 11 are fixed by the bolt N3. However, the housing 21 is attached to the support shaft 11 by a rivet or the like that penetrates the support shaft 11 in the radial direction. And may be fixed so that it cannot rotate.

  (7) In the first embodiment, of the winding roll 12D of the winding shaft 12, the mounting member 14 is fitted only inside the end portion on the side where the shutter latch device 20 is mounted, and the opposite end portion and Although the drum is fitted inside the center portion, a part or all of the plurality of drums provided on the winding shaft 12 may be replaced by the mounting member 14.

10 Shutter device 11 Support shaft 12D Winding roll 13 Drum (mounting member)
14 mounting member 15 mounting member side connecting protrusion (second connecting portion)
19 Shutter curtain 20 Shutter latch device 21 Housing (support base)
22B Bolt insertion hole (long hole)
24 Connection sleeve (connection cylinder)
26 Ratchet wheel 27 Gear side connecting protrusion (first connecting part)
29 Device body 30 Ratchet lever N3 Bolt (Screw member)

Claims (5)

A shutter latch device that is assembled to a shutter device in which a cylindrical winding roll capable of winding a shutter curtain is rotatably supported by a support shaft,
An attachment member that is fixed to one end of the winding roll and through which the support shaft passes, a support base that is fixed to the one end of the support shaft in a non-rotatable manner, and rotatably connected to the support base, A shutter latch device comprising: a ratchet wheel fixed to the mounting member so as to be integrally rotatable; and a ratchet lever which is rotatably supported by the support base and forms a latch mechanism together with the ratchet wheel.   A plurality of first connecting portions protruding from the ratchet wheel toward the mounting member; and a plurality of second connecting portions protruding from the mounting member toward the ratchet wheel and fixed to the plurality of first connecting portions. The shutter latch device according to claim 1. The plurality of first connecting portions are three or more gear-side connecting protrusions protruding from the inner peripheral edge of the ratchet wheel to the attachment member side,
The plurality of second connecting portions are three or more mounting member side connecting protrusions that protrude from the mounting member toward the ratchet wheel and are screwed onto the plurality of gear side connecting protrusions. The shutter latch device according to claim 2, wherein   A connection that protrudes from the inner peripheral edge of the ratchet wheel toward the take-up roll and is fitted between the inner peripheral surface of the mounting member and the outer peripheral surface of the support shaft, and is connected to the mounting member so as to be integrally rotatable. The shutter latch device according to claim 1, further comprising a cylindrical portion.   A long hole extending in the axial direction of the support shaft is formed in the support base, and the support base cannot be rotated to the support shaft by inserting a flange member penetrating the support shaft in the radial direction into the long hole. The shutter latch device according to any one of claims 1 to 4, wherein the shutter latch device is fixed to the shutter.

Images