JP2004204662A - Latch pull-back device for door lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a latch pull-back device for a door lock capable of being built in the other device in addition to the latch pull-back device by rationally disposing each member to effectively use a space in a lock case. <P>SOLUTION: In this latch pull-back device for the door lock, an operating rod provided integrally with a latch and horizontally moved is disposed in an operating rod frame formed at the center in the internal space of the lock case, and the latch pull-back device is built in an upper part or a lower part in the internal space on the basis of the operating rod. The latch pull-back device comprises a latch cam which cooperates with an operating handle shaft and has an engaging part engaged with an engaged part of the operating rod; a cam pressure contact body engaged with the engaged part of the latch cam; and a latch cam spring for energizing the cam pressure contact body. A latch spring is disposed behind the operating rod, and the latch retreats together with the operating rod against the spring force of the latch spring when the latch cam is rotated against the spring force of the latch cam spring by the operating handle shaft. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a door lock latch pullback device.
[0002]
[Prior art]
The invention described in Japanese Patent Application Laid-Open No. 10-30368 can be pointed out as a prior art. In the embodiment described in this publication, the members constituting the latch pull-back device are linearly incorporated in the lock box in the direction of the axis (handle) of the latch. That is, a first sliding member (a long plate-shaped L-shaped slider piece) is provided in an upper space in a lock box with reference to a latch bolt having a latch shaft, while a first slide member is provided in a lower space in the lock box. (2) A sliding member (a long plate-shaped L-shaped slider piece) is provided, and a cam latch (a hub that rotates on a handle shaft) is provided so as to engage with the rear ends of these upper and lower sliding members. And a rocking lever and the like, which is pivotally supported by a lock box between the upper and lower sliding members.
[0003]
Of course, this conventional example also aims at efficiently arranging each member in the lock box (effectively utilizing space). However, as described above, each member constituting the latch retractor is connected to the latch bolt. Since it is linearly assembled in the direction of the shaft (handle), it cannot be asserted that the space is effectively utilized.
Therefore, it is impossible to provide other devices (mechanisms) in the lock box other than the latch pullback device (mechanism), for example, a device for preventing a thumb-turn lock from being locked out. Therefore, it is desired to further utilize the space in the lock box by devising the arrangement and combination of the respective members constituting the latch pullback device and the cooperation of the respective members.
[0004]
[Problems to be solved by the invention]
A first object of the present invention is to arrange each member rationally and to effectively utilize the space in the lock box. A second object is that each member can be easily incorporated into the lock box. A third object is that a lock box can be provided with a lock-out prevention device, for example, a thumb-turn lock, in addition to the latch pull-back device. In addition, each member operates smoothly.
[0005]
[Means for Solving the Problems]
The latch / pull-back device for a door lock according to the present invention is provided with an operating rod which is provided integrally with the latch and moves horizontally in an operating rod frame formed at the center of the internal space of the lock box. A latch retraction device is incorporated in one of the upper and lower portions of the internal space with respect to the reference, and the latch retraction device engages with a latch cam cooperating with an operation handle shaft, and one end side engages with an engagement portion of the latch cam, An intermediary slider that moves horizontally by the driving force of the latch cam, and one end is pivotally supported so as to intersect the other end of the intermediary slider in the vertical direction, and is pivotally connected to a projection pin provided on the intermediary slider. And a free end of the retractable swing arm is engaged with an engaged portion of the operating rod of the latch, and a latch bar is provided behind the operating rod. In the internal space, a latch cam spring for pushing the latch cam back to the initial position and a cam pressing member are respectively incorporated, and the latch is rotated by the operation handle shaft against the spring force of the latch cam spring. The intermediate slider and the pull-back swing arm cooperate with each other to retreat with the operating rod against the spring force of the latch spring.
[0006]
In the above configuration, a member constituting the latch pull-back device X is provided in one space of the lock box 5 on the basis of the operating rod frame portion, and a thumb-turn lock lockout prevention device is provided in the other space of the lock box 5. It is characterized in that the members constituting Y are respectively incorporated. Further, the lock-out prevention device Y for the thumb-turn lock includes a release component for the thumb-turn dharma that engages with the operating rod, and the release component has a tip portion at the engaged surface of the lever escape notch formed on the operating rod. A lever pivotally supported so that the engaging claw portion of the lever is engaged, and a slider for unlocking a lock piece that is provided so that the tip end side engages with the lower end of the lever and slides in the horizontal direction. Characterized by the following.
[0007]
Further, the latch / pull-back device for a door lock according to the present invention is provided with an operating rod integrally provided with the latch and horizontally moving within an operating rod frame formed at the center of the internal space of the lock box. A latch retraction device is incorporated in one of the upper and lower portions of the internal space with respect to the rod, and the latch retraction device cooperates with the operating handle shaft and engages with the engaged portion of the operating rod. A latch cam having a portion, a cam press-contact body engaging with the engaged portion of the latch cam, and a latch cam spring biasing the cam press-contact body. Is characterized in that when the latch cam is rotated by the operation handle shaft against the spring force of the latch cam spring, the latch cam retreats together with the operating rod against the spring force of the latch spring.
[0008]
In the above configuration, a member constituting the latch pull-back device X is provided in one space of the lock box 5 on the basis of the operating rod frame portion, and a thumb-turn lock lockout prevention device is provided in the other space of the lock box 5. It is characterized in that the members constituting Y are respectively incorporated. Further, the thumb-turn lock-out prevention device Y includes a release member for the thumb-turn dharma that engages with the operating rod. When the indoor door is closed, the latch comes into contact with the edge of the door frame, and the release mechanism has an operating gear. The member cooperates with the retreating of the operating rod to rotate the thumb turn damper, whereby one engaging portion 70a of the latch cam lock piece moves in the direction of disengagement.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
One embodiment of the present invention will be described with reference to FIGS. First, the environmental members will be briefly described. 1 is a door frame of an entrance such as a bedroom, a toilet, etc., 2 is a bracket having a strike, 3 is an edge of the door frame (including a strike directly), and 4 is turned in a horizontal direction to open and close the entrance. The interior door 5 is provided at the door end of the interior door, and has a lock box provided with a latch retraction device X or the like in which the latch is retracted into the lock box by the driving force of the latch cam. It is the front to do.
[0010]
Next, the lock box 5 will be briefly described. As shown in FIG. 2, the lock box 5 includes a case body 5a and a case lid 5b for closing one side opening of the case body. Here, the configuration related to claim 1 (independent claim) will be described with reference to FIG.
[0011]
Reference numeral 7 denotes a long plate-shaped front mounting plate which is combined with the above-described front 6 via a fixing tool (not shown). Reference numeral 8 denotes a partition-like latch frame portion formed in a wall shape facing the case body 5a with reference to the opening window formed in the front 6 and the front plate 7 for mounting. The latch frame portion 8 is a central portion of the case body 5a. At the front end (left side in the figure), a horizontal state is provided from the inner wall surface of the mounting front plate 7 toward the rear wall 9 of the case body 5a, and the rear end side has a symmetrical L-shape.
[0012]
Reference numeral 10 denotes a partition-like operating rod frame portion provided continuously with the rear end portion of the latch frame portion 8. The operating rod frame portion 10 includes an upper horizontal protruding wall 10a and a necessary storage for the upper horizontal protruding wall 10a. It comprises a lower horizontal protruding wall 10b opposed to a space, and a rear protruding wall 10c which is provided continuously to the rear ends of these horizontal protruding walls 10a and 10b.
[0013]
Reference numeral 11 denotes a cutout for a release lever, which is included in a part of the lower horizontal protruding wall 10b and constitutes a thumb-turn lock lockout prevention device Y. A lever fixed shaft 12 is formed directly below the release lever notch 11. Here, the "thumb lock" means a locking device for a handle lock inside a house. The `` lock-out prevention device '' locks the interior door provided at the entrance of the building or at the entrance of the room such as a toilet or bedroom when the door is open, and then locks the door when the door is inadvertently closed. A lock to prevent a situation from occurring. The handle of the handle lock includes a knob in addition to the lever handle.
[0014]
A protruding wall-shaped frame portion that forms another storage space is formed continuously at the rear end of the latch frame portion 8. In the present embodiment, the upper horizontal protruding wall 10a of the operating rod frame portion 10 also partially functions. That is, reference numeral 13 denotes a third horizontal protruding wall provided to face the upper horizontal protruding wall 10a in order to form a required spring storage space 14.
[0015]
Therefore, the case body 5a of the present embodiment has horizontal protruding walls 10a, 10b, 13 corresponding to a plurality of partition walls in the vertical direction at the rear end of the latch frame 8, and these are formed horizontally. The present invention is characterized in that a latch operating rod and a latch cam spring, which will be described later, are installed in a horizontal state in a storage space in a vertical relationship formed by a protruding wall. This effectively utilizes the internal space of the case body 5a. In the present embodiment, a plurality of horizontal protruding walls 10a, 10b, 13 are continuously formed at the rear end of the latch frame 8, but a cutout may be partially formed. .
[0016]
Next, reference numeral 15 denotes a cylindrical fitting projection formed continuously on the inner surface of the upper wall of the third horizontal protruding wall 13. The cylindrical fitting projection 15 is larger than the outer end surface of the third horizontal protruding wall 13. It protrudes slightly outward, and in this embodiment, fits into a fitting hole (not shown) formed at the center of the upper end of the case lid 5b. Reference numeral 17 denotes a first stopper portion for the latch cam, which is similarly formed on the upper wall of the third horizontal projection wall 13 and a part of the outer peripheral wall of the cylindrical fitting projection 15. The first stopper portion 17 has an inclined stopper surface 51A on the side facing the upper wall 18 of the case body 5a, and a guide surface 17b continuously connected to the stopper surface 51A in an arc shape in an angular direction. .
[0017]
Next, reference numeral 19 denotes a second stopper portion for the latch cam, which is a cylindrical protrusion protruding from the inner wall surface of the rear wall 9 of the case body 5a so as to face the guide surface 17b of the first stopper portion 17. A latch cam fitting hole 20 to be described later is formed between the latch cam second stopper portion 19 and the first stopper portion 17.
[0018]
Next, the case body 5a is formed with a horizontal guide portion (horizontal guide groove, horizontal long hole, etc.) for guiding several members to be incorporated in the horizontal direction. One of them is a first guide elongated hole 21 for the intermediary slider formed between the third horizontal protruding wall 13 and the front end portion (left side) of the upper wall 18 of the case body 5a. The other is a second guide slot 22 for a cam pressure contact piece formed between the rear end of the third horizontal protruding wall 13 and the rear end of the upper horizontal protruding wall 10a of the operating rod frame 10. It is.
[0019]
Next, reference numeral 23 denotes a pivot shaft for a retraction swing arm, which is formed between the first guide slot 21 for the intermediate slider and the tip of the upper wall 18 of the case body 5a. A plurality of mounting projections 24 having female threads are provided at appropriate locations on the case body 5a, for example, on the left and right of the upper part, and one of them (the right mounting projection) functions as a third stopper portion for the latch cam. To fulfill.
[0020]
Next, reference numeral 25 denotes a second pivot for a lock piece protruding in the vicinity of the center of the rear wall 9 of the case body 5a, which is not directly related to the specific requirements of the present invention. The case cover 5b is formed with a latch cam fitting hole, a uniting fitting hole, a plurality of horizontal slots, and a plurality of mounting through holes, but illustration and description thereof are omitted.
[0021]
The above is the configuration of the case body 5a related to the main members of the present invention. Therefore, the latch / pull-back device X of the door lock of the present invention is provided integrally with the latch in the operating rod frame 10 formed at the center of the internal space of the lock box 5, and operates horizontally with the operating rod 50. And a latch retraction device is incorporated in one of the upper and lower portions of the internal space with reference to the operating rod 50. As shown in FIG. 1, the latch retractor X of the first embodiment is disposed in an upper internal space, and one end of a latch cam 30 cooperating with an operation handle shaft and an engaging portion 35 of the latch cam 30 is engaged. And an intermediate slider 40 that is horizontally moved by the driving force of the latch cam, one end of which is axially supported so as to intersect the other end of the intermediate slider 40 in the vertical direction. And a latch pull-back swing arm 46 in which a portion near the pivotal end is engaged with the projection pin 44 provided on the arm. The free end portion 49 of the pull-back swing arm 46 engages with the engaged portion 56 of the operating rod 50 of the latch 61, and a latch spring 51 is disposed behind the operating rod 50. A latch cam spring 65 for pushing the latch cam 30 back to the initial position and a cam pressure contact body 66 are respectively incorporated in the internal space of the latch 61. When the latch cam 30 rotates against the spring force of the latch cam spring 65 by the operating handle shaft, The intermediary slider 40 and the pull-back swing arm 46 cooperate to retreat with the operating rod 50 against the spring force of the latch spring 51. Hereinafter, each member will be described in detail.
[0022]
First, reference numeral 30 denotes a latch cam that cooperates with an operation handle shaft (core shaft) 31. The latch cam 30 is fitted into the fitting hole 20 of the case body 5a and the case lid 5b. The latch cam 30 can be rotated by operating the operation handle. Generally, when the inner and outer operating handles are in a horizontal position (initial position), the latch protrudes from the front of the lock box. Therefore, when the operating handle is pushed down to a predetermined angle, the latch retracts into the lock box. The same applies to the present embodiment.
[0023]
Now, the configuration of the latch cam 30 will be described with reference to FIGS. Reference numeral 32 denotes a cylindrical fitting portion (hub) having a square shaft hole through which the handle shaft 31 penetrates; 33, an annular sliding contact portion continuously provided on the peripheral wall of the cylindrical fitting portion 32; An engagement part for a fish tail-shaped lock piece protruding radially from a part thereof is also used for an intermediate slider of a fish tail shape partially protruded radially from a part of the annular sliding contact part 33. This is a latch cam engaging portion.
[0024]
The latch cam engaging portion 35 is located in the opposite direction (upward in the figure) with respect to the lock piece engaged portion 34, and when the operation handle 36 is at the initial position (horizontal position), the first stocker portion 17 for the latch cam is provided. Is pressed against the stopper surface 51A. At this time, the lock piece engaged portion 34 is simultaneously in pressure contact with the second stopper portion 19 on the rear wall side.
[0025]
Next, reference numeral 40 denotes a horizontally long intermediate slider which is engaged with the latch cam engaging portion 35 of the latch cam 30 at one end (the rear end in FIG. 1) and moves horizontally by the driving force of the latch cam. In this embodiment, the horizontally long intermediate slider 40 is arranged along the inner wall surface of the upper wall 18 of the case body 5a as shown in FIG.
[0026]
The intermediary slider 40 will be described with reference to FIG. The mediation slider 40 is a pistol-shaped frame piece member in appearance. A thin protruding piece 41 is formed at one end, and this protruding piece 41 can slide on the inner wall surface of the upper wall 18 of the case body. Reference numeral 42 denotes a rectangular engaged portion (for example, an engaging hole) which is formed on the upper wall portion of the one end and engages with the latch cam engaging portion 35 in a loosely fitted state.
[0027]
The other end (the tip side in FIG. 1) of the intermediate slider has an inverted L-shape. That is, the other end is continuously provided in a stepped manner downward. A pair of small through holes 43 are formed in the other end portion, and a projection pin 44 is provided in the small through hole 43 in a penetrating state. The projection pin 44 and the intermediate slider 40 are integrated. The protruding end of the projection pin 44 is engaged with the first guide slot 21 of the case body 5a and the case lid 5b.
[0028]
Therefore, the intermediate slider 40 is horizontally guided by the projection pins 44. When the intermediate slider 40 moves to the rear wall 9 side of the case body, the arcuate surface 45 inside the rear end portion can contact the outer peripheral surface of the cylindrical fitting projection 15 of the case body 5a. .
[0029]
Next, one end (upper end in FIG. 1) is pivotally supported by the first pivot shaft 23 so as to intersect with the other end of the intermediate slider 40, and is pivotally supported by the projecting pin 44 provided on the intermediate slider. This is a latch pull-back swing arm that is engaged with a portion near the end.
[0030]
With reference to FIG. 5, the retractable swing arm 46 cooperating with the intermediate slider 40 will be described. Reference numeral 47 denotes a shaft hole formed at the pivot end, reference numeral 48 denotes a long plate portion, and reference numeral 49 denotes a partially circular free end. The shaft hole 47 fits into the first pivot 23 as described above.
[0031]
The long plate portion 48 straddles the third horizontal protruding wall 13 of the case body 5a and the upper horizontal protruding wall 10a of the operating rod frame portion. Therefore, the free end 49 faces the front end side in the operating rod frame 10. In the present embodiment, the free end portion 49 of the pull-back swing arm 46 is provided so as to engage with an engagement groove of a side wall of the operating rod described below.
[0032]
Next, reference numeral 50 denotes an operating rod of a latch disposed in a horizontal state together with a latch spring 51 in the operating rod frame 10 so as to engage with the free end 49 of the pull-back swing arm 46. The operating rod 50 is incorporated in a required space communicating with the space in the latch frame portion 14 while being biased by the latch spring 17, and is slidably movable in the horizontal direction. The operation lever 50 of the latch will be described with reference to FIG. As shown in FIG. 5, the operating rod 50 has a short rectangular shape having a rectangular end face.
[0033]
Reference numeral 52 denotes a stepped fitting groove for the latch shaft formed at the distal end of the operating rod 50, and a flange-like fitting portion of the latch shaft described later is fitted into the fitting groove 52. On the other hand, reference numeral 53 denotes a spring end storage recess (spring end support portion) for the latch spring formed on the rear end wall surface of the operating rod 50. The spring end storage recess 53 and the rear wall 10b of the operating rod frame 10 are provided. A latch spring 51 for indirectly urging the latch 61 is mounted in a horizontal state.
[0034]
Reference numeral 54 denotes a lever escape notch which is formed along the lateral direction at a portion near the rear end of the bottom of the operating rod 50 and has a vertical or inclined engaging surface 55 on the front side in the notch. .
[0035]
Further, reference numeral 56 denotes a slightly wide engaging groove formed at a portion of the side wall (the front wall surface in reference to FIG. 1) near the front end portion from the edge of the upper end portion to the vicinity of the bottom portion. As described above, the free end portion 49 of the retraction swing arm 46 is engaged with 56 with a margin (a little gap downward).
[0036]
Next, the latch 61 that appears and retracts with reference to the front 6 will be described with reference to FIG. The latch 61 includes an engagement head 62 and a latch shaft 63 provided integrally with the engagement head 62, and the engagement head 62 is inclined with respect to the edge 3 of the door frame 1. A sliding surface 62a, an abutting surface or an engaging surface 62b intersecting with the inclined sliding surface and being locked to the strike of the receiving fitting 2 when the door is closed, and a rear wall surface orthogonal to the engaging surface 62b 62c.
[0037]
Further, the latch shaft 63 has a flange-shaped fitting portion 63a provided at the rear end thereof so as to be continuous with the annular groove. The form and function of the latch 61 are not particularly limited as long as the latch 61 has a function of retreating by hitting the edge 3 of the door frame 1 when the door is closed. Therefore, an inversion latch that rotates while moving backward may be used. In this embodiment, the latch 61 is united with the operating rod 50 via the latch shaft 63.
[0038]
Finally, as shown in FIG. 1, reference numeral 65 denotes a latch cam spring incorporated in the spring accommodating space 14. The latch cam spring 65 engages a block-shaped cam pressure contact body 66 guided by the second guide elongated hole 22 of the case body 5 a. And pushes the latch cam 30 back to the initial position.
[0039]
Next, the operation will be described with reference to FIGS. FIG. 1 shows a case where the operation handle 36 indicated by a virtual line is located in a horizontal state. In this case, the latch 61 projects from the front 6 via the operating rod 50 by the spring force of the latch spring 51. On the other hand, the latch cam 30 is rotated counterclockwise through the cam pressure contact piece 66 by the relatively strong spring force of the latch cam spring 65, and the engaged portion 34 below the latch cam 30 contacts the second stopper portion 19. . At this time, the intermediary slider 40 is slightly retracted to the front 6 side, and the cooperating pull-back swing arm 46 hangs down in a substantially vertical state.
[0040]
Then, as shown in FIG. 7, the operation handle (for example, lever handle) 36 is lowered. FIG. 7 is an explanatory view of a halfway state in which the operating handle 36 is lowered. When the operating handle 36 is lowered, the latch cam 30 integrated with the operating handle shaft 31 receives the spring force of the latch cam spring 65 with the rotation of the operating handle. Start turning clockwise in opposition.
[0041]
Therefore, as shown by the arrow in FIG. 7, the movement directions of the intermediate slider 40 and the cam pressure contact piece 66 are reversed. That is, since the engaged portion 42 is locked by the latch cam engaging portion 35 of the latch cam 30, when the latch cam 30 rotates clockwise, the intermediate slider 40 and the first guide slot 21 and the case body are rotated. It moves while being guided by the upper wall 18 of 5a. At this time, the projecting pin (movable pin) 44 of the intermediary slider 40 moves while being guided by the horizontal guide portion 21 of the lock box 5, so that the retraction swing arm 46 pivots about the pivot 23 in the counterclockwise direction indicated by the arrow. I do. Therefore, the operating rod 50 retreats against the spring force of the latch spring 51.
[0042]
Since the latch 61 is integrally connected to the operating rod 50 via the latch shaft 63, when the operating rod 50 is retracted, the latch 61 is retracted into the lock box 5.
[0043]
Therefore, when the latch cam 30 is rotated by the operation handle shaft 31, the intermediary slider 40 and the pull-back swing arm 46 cooperate to move the latch operating rod 50 to the latch spring 51 of the latch spring 51. Retreat against force.
[0044]
By the way, in this embodiment, in order to effectively utilize the internal space of the lock box 5, as shown in FIG. On the other hand, the main member constituting the lock-out prevention device Y for the thumb-turn lock is incorporated in the space below the lock box 5.
[0045]
Thus, the thumb-turn lock-out prevention device Y will be briefly described with reference to FIG. The lock-out prevention device Y includes a latch 61 protruding by a spring force of a latch spring 51, a latch cam 30 rotatable by operation of an operation handle 36, a lock piece 70 for locking the rotation of the latch cam 30 when locked, It is composed of a thumb-turn dharma 71 having a drive arm for preventing rotation of one piece, and a thumb-turn dharma release component 72 disposed below the operating rod frame portion 10. Incidentally, reference numeral 75 denotes a thumb turn damper spring having a click function.
[0046]
The release member 72 includes a release lever 73 that is pivotally supported so that the engagement claw portion at the distal end engages with the engaged surface 55 of the lever escape notch portion 54 of the operating rod 50. A slider 74 is provided so that the tip end side is engaged with the lower end of the release lever 73 and slides horizontally.
[0047]
With respect to the operation of the lock-out prevention device Y for the thumb-turn lock, when the interior door 4 is closed and the latch 61 retreats by hitting the edge 3 of the door frame 1, the release lever 73 and the slider 74 of the release component member 72 operate. The drive arm 71a of the thumb turn darma 71 is pulled away from the lower engaging portion 70a of the lock piece 70 in cooperation (interlocking) with the retreat of the rod 50, whereby the latch cam lock piece 70 is resiliently moved by the spring force of the return spring 76. , Thereby moving (for example, rotating) in the direction of disengagement.
[0048]
【Example】
Although the latch 61 and the latch operating rod of this embodiment are integrally connected to separate members, the latch 61 is pulled back to the latch shaft 63 of the latch 61 and the free end of the swing arm 46 is engaged with the engaging portion (wide portion). A latch operating rod having a groove may be formed (this is also the same invention).
[0049]
Further, the relationship between the engaging portion and the engaged portion in the present embodiment may be reversed. For example, the latch cam engaging portion 35 formed on the latch cam 30 is a projection, but this is used as a groove as an engaged portion, while the engaging hole 42 formed at one end of the horizontally long intermediate slider 40 is engaged with the engaging projection. The design may be changed to the engaging portion as a.
[0050]
Further, the design of the engagement between the projecting pin 44 provided on the intermediate slider and the portion of the latching return swing arm 46 near the pivotal support end is changed to the engagement relationship between the grooves and the engagement holes of both members 44 and 46. Therefore, such a modified example is also included in the meaning that “the part near the pivot end is engaged”.
[0051]
Next, FIG. 8 shows another example of the mediating slider 74A. The above-described intermediate slider 40 has a pair of small through holes 43 at the rear end of which is provided with a projecting pin 44 that is guided by the horizontal guide portion of the lock box 5, and at least pulls back and swings the swing arm 46. If it has a function, a pair or one projection shaft 44A, 44A may be formed at the rear end of the intermediate slider 74A as shown in FIG.
[0052]
Next, a second embodiment of the present invention will be described with reference to FIGS. In the second embodiment, a member constituting the latch pull-back device X is provided in one space of the lock box 5 on the basis of the operating rod frame portion 10A or the operating rod 50A. In this space, the members constituting the lock-out prevention device Y for the thumb-turn lock are the same as in the first embodiment, and the same parts as those in the first embodiment are denoted by the same or similar reference numerals. And the duplicate description will be omitted.
[0053]
Therefore, the differences between the first embodiment and the second embodiment will be briefly described as follows. (A) The latch pull-back device X is installed below the internal space with reference to a long rod-shaped operating rod 50A formed at the center of the internal space of the lock box 5, while preventing the thumb-turn lock from being locked out. The device Y is installed above the internal space with reference to the operating rod 50A. (B) The latch retraction device X cooperates with an operating handle shaft and engages with the operating rod 50A. A latch cam 30A having a latch cam engaging portion (upper) 35A that engages with the portion 56A, a block-shaped cam pressure contact body 66A that engages with an engaged portion (lower) 34A of the latch cam 30A, and the latch cam 30A in an initial position. And (C) the latch spring 51A, which urges the cam pressure contact body 66A so that the cam pressure contact body 66A can be pushed back. (D) On the other hand, the release component for the thumb-turn dharma of the lock-out prevention device Y for the thumb-turn lock has the following difference between the rear end of the moving rod and the rear wall 9 of the lock box 5. is there.
[0054]
FIG. 9 shows an unlocked state in which the thumb turn is not turned in the locking direction with the door closed. As is apparent from a comparison between FIG. 9 and FIG. 1, the operating rod 50A of the second embodiment is longer than that of the first embodiment, and extends beyond the operating frame 10A from the latch frame 8 to the case body 5a. It has a long rod shape that extends to the vicinity of the rear wall 9.
[0055]
FIG. 10 shows one of the operating gears 73A of the operating rod 50A and the release component 72A. This operating rod 50A is the same as the first embodiment in that it is a horizontal rod-shaped operating rod disposed horizontally behind the latch 61 as described above. As shown in FIG. 10, the shape is a long rectangular shape having a rectangular end face. In this embodiment, the operating rod frame portion 10A is incorporated in a penetrating state while being urged by a latch spring 51A having a pressing spring function.
[0056]
Referring to FIG. 10, reference numeral 54A denotes an operating gear escape cutout with which the protruding engaging portion 73a of the first operating gear 73A is engaged. The cutout 54A is formed in the upper front part of the center of the operating rod 50A. Therefore, 55A is an engaged surface of the notch with which the projecting engaging portion 73a of the first operating gear 73A engages.
[0057]
Reference numeral 57 denotes a spring end support portion for a latch spring protruding from the rear end wall surface of the operating rod 50A. A latch 61 is indirectly attached between the spring end support portion 57 and the rear wall 9 of the lock box 5. A biasing latch spring 51A is incorporated in a horizontal state.
[0058]
Reference numeral 56A denotes an engaged portion (wide notch) formed on a side wall on the other side of the operating rod 50A. The wide engaged portion 56A has a latch cam incorporated in a space below the lock box 5. The distal end portion having the mountain-shaped engagement portion 35A of 30A penetrates and penetrates. Reference numeral 58 denotes a stopper protruding from a lower portion near the rear end of the operating rod 50A. The stopper 58 can abut on a vertical portion of the operating rod frame 10A.
[0059]
Here, the first operation gear 73A of the release component member 72A will be described with reference to FIG. The first operating gear 73A is rotatably provided via the fixed support shaft 12A such that the protruding engaging portion 73a is engaged with the engaged surface 55A of the operating rod 50A. The gear portion 73b of the first operating gear 73A is formed about half in the circumferential direction. Therefore, when the gear portion 73b and the projecting engagement portion 73a are combined, the first operating gear 73A has a half-strongly projecting portion in the circumferential direction.
[0060]
Referring to FIG. 9, reference numeral 71 </ b> A denotes a Samtan dharma having a gear portion disposed in an internal space above the rear wall of the lock box 5. A second operating gear 74A, which constitutes a release component 72A, is rotatably provided between the thumb turn derma 71A and the first operating gear 73A.
[0061]
Accordingly, the release component 72A of the second embodiment is disposed between the first operating gear 73A having the function of engaging and disengaging the operating rod 50A and the first operating gear 73A and the thumb-turn dharma 71A, And a second operating gear 74A having an intermediate transmission function. Therefore, these operating gears 73A and 74A replace the arm-shaped lever 32 and the plate-shaped slider 40 of the first embodiment with a gear mechanism.
[0062]
The angle lock 70A will be described with reference to FIG. The lock piece 70A is disposed in the internal space on one side (for example, the upper part) of the lock box 5, similarly to the release constituent member 72A and the thumb tunder 71A. That is, the lock piece 70A is provided rotatably (swinging) via the support shaft 25A in the internal space between the latch spring 51A and the thumb-turn dharma 71A located behind the operating rod 50A.
[0063]
As shown in FIG. 11, the lock piece 70A is formed in a U-shape end face, and has a first engagement portion 70a which engages with and disengages from the engagement portion 35A of the latch cam 30A. It has a pair of finger-shaped second engaging portions 70b which are continuously provided in the cross direction and which are engaged with the driving arm 71a of the thumb turn darma 71A. A thumb talma spring 75A having a click function is mounted on the lock piece 70A via the support shaft 25A.
[0064]
FIG. 12 shows an operation mode when the latch cam 30A is rotated clockwise by an operation handle (not shown) in the above configuration. In this case, since the operating rod 50A is returned by the spring force of the latch spring 51A by the engagement portion 35A of the latch cam 30A, the state of FIG. 9 is changed to the state of FIG. When the operation handle is released, the latch cam 30A returns to the original position via the cam pressure contact body 66A by the spring force of the latch cam spring 65A.
[0065]
FIG. 13 shows a case where the inner lock state is inadvertently entered. On the other hand, FIG. 14 shows the moment when the indoor door 4 is closed in the above case. In this case, when the operating rod 50A is pushed by the latch 61 and retreats against the spring force of the latch spring 51A, the first operating gear 73A pushes the protruding engagement 73a against the engaged surface 55A of the operating rod 50A. As a result, it rotates counterclockwise about the fixed shaft 12A. When the first operating gear 73A rotates counterclockwise, the second operating gear 74A rotates clockwise as indicated by the arrow.
[0066]
Therefore, the drive arm 71a of the thumb turn darma 71A moves away from one engagement portion 70a of the lock piece 70A and moves to the other engagement portion 70b. When the drive arm 71a changes the position of the rotation of the thumb-turn dharma 71A in this manner, the lock piece 70A also slightly rotates in the direction of disengagement, so that the latch cam 30A is free, and the operating rod 50A is connected to the latch spring 51A. Retreat against spring force. Therefore, when the indoor door 4 is closed, the latch 61 is retracted, so that the so-called inner lock is always released (always in the state of FIG. 14).
[0067]
【The invention's effect】
As is clear from the above description, the present invention has the following operations and effects.
(1) Each member can be rationally arranged, and the space in the lock box can be effectively used.
(2) Each member can be easily incorporated into the lock box.
(3) In addition to the latch pullback device, for example, a lockout prevention device for a thumb-turn lock can be provided in the lock box.
[Brief description of the drawings]
1 to 7 are explanatory views showing a first embodiment of the present invention. FIG. 8 is a perspective view showing another example of the mediating slider. 9 to 14 are explanatory views showing a second embodiment of the present invention.
FIG. 1 is an explanatory diagram viewed from the front when an indoor door is closed.
FIG. 2 is an explanatory view showing a case body.
FIG. 3 is an explanatory view of a latch cam and an operation handle shaft.
FIG. 4 is an explanatory view centering on an intermediate slider.
FIG. 5 is an explanatory view centering on an operating rod.
FIG. 6 is an explanatory diagram illustrating the latch from a plan view.
FIG. 7 is an explanatory diagram of an operation (intermediate state).
FIG. 8 is a perspective view showing another example of the intermediate slider.
FIG. 9 is an explanatory diagram viewed from the front when the indoor door of the second embodiment is closed.
FIG. 10 is an explanatory view centering on an operating rod.
FIG. 11 is an explanatory view of a lock piece.
FIG. 12 is an explanatory diagram when the latch is pulled back.
FIG. 13 is an explanatory diagram of a locked state.
FIG. 14 is an explanatory view when the door is closed in FIG. 13;
[Description of Signs] 1 ... door frame, 2 ... receptacle, 3 ... rim, 4 ... door, 5 ... lock box, 5a ... case body, 5b ... case lid, 6 ... front, 7 ... front plate for mounting, 8 ... Latch frame part, 9 ... rear wall of the case body, 10, 10A ... operating rod frame part, 10a ... upper horizontal protruding wall, 10b ... lower horizontal protruding wall, 11 ... notch, 12, 12A ... fixed shaft, 13 ... Reference numeral 3 denotes a horizontal protruding wall, 14: spring storage space, 15: fitting projection, 17: first stopper portion for latch cam, 18: upper wall of the case body, 19: second stopper portion, 20: fitting hole, 21: first. Guide long hole, 22: second guide long hole, 23: pivot, 24: mounting projection, 25, 25A: pivot, 30, 30A: latch cam, 31: operating handle shaft, 32: tubular fitting part, 33: slide Contact part, 34, 34A ... engaged part, 35, 35A ... engagement part, 36 ... operation handle, 40, 7 A: intermediate slider, 41: projecting piece, 42: engaged part of intermediate slider, 43: small through hole, 44: projection pin, 44A: projection shaft, 45: arcuate surface, 46: retraction swing arm, 47 ... Shaft hole, 48 ... Long plate part, 49 ... Free end part, 50,50A ... Working rod, 51,51A ... Latch spring, 52 ... Fitted groove, 54,54A ... Notch part, 55,55A ... Notch part Engaged surface, 56, 56A Engaged part, 61 Latch, 62 Engagement head, 63 Latch shaft, 65, 65A Latch cam spring, 66, 66A Cam pressed body, 70, 70A Lock piece , 71, 71A ... Thumb Turn Dharma, 72, 72A ... Release Constituent Member, 73 ... Lever, 73A ... First Working Gear, 74 ... Slider, 74A ... Second Working Gear, 75 ... Thumb Turn Dharma Spring, X ... Latch Pull Back Device, Y ... Sam Over down the lock foreclosure prevention device.

Claims (6)

An operating rod integrally provided with the latch and horizontally moving is disposed in an operating rod frame formed at the center of the inner space of the lock box. A latch pull-back device is incorporated into one of the latch pull-back devices. The latch pull-back device includes a latch cam that cooperates with an operation handle shaft, an intermediate slider that has one end engaged with an engagement portion of the latch cam, and that horizontally moves by a driving force of the latch cam. A latch pull-back swing in which one end is pivotally supported so as to intersect the other end of the intermediate slider in the vertical direction, and a portion near the pivotal end is engaged with a projection pin provided on the intermediate slider. And a free end of the pull-back swing arm engages with an engaged portion of the operating rod of the latch, and a latch spring is disposed behind the operating rod. A latch cam spring that pushes the latch cam back to the initial position, and a cam pressure contact body are respectively incorporated.When the latch cam is rotated against the spring force of the latch cam spring by the operation handle shaft, the intermediate slider and the pullback swing arm cooperate, A latch retraction device for a door lock, wherein the device retreats against a spring force of a latch spring together with an operating rod. 2. A lock-back device according to claim 1, wherein the latch box pull-out device is provided in one space of the lock box, and a thumb-turn lock is prevented in the other space of the lock box. A latch / pull-back device for a door lock, wherein members constituting the device Y are incorporated. The lock-out prevention device Y for a thumb-turn lock according to claim 2, further comprising a release component for the thumb-turn dharma engaging with the operating rod, wherein the release component is engaged with a lever escape notch formed in the operating rod. A lever pivotally supported so that the engaging claw portion of the distal end portion engages with the mating surface, and a lock piece provided so that the distal end portion side engages with the lower end portion of the lever and sliding in the horizontal direction An unlocking device for a thumb lock of an indoor door, comprising a release slider. An operating rod integrally provided with the latch and horizontally moving is disposed in an operating rod frame formed at the center of the inner space of the lock box. A latch retraction device is incorporated into one of the latch retraction devices. The latch retraction device cooperates with an operating handle shaft and has an engaging portion that engages with the engaged portion of the operating rod. And a latch cam spring for urging the cam pressure contact body. A latch spring is disposed behind the operating rod, and the latch is operated by the operating handle shaft so that the latch cam receives the spring force of the latch cam spring. A latch retraction device for a door lock characterized in that when rotated in opposition, the lever retracts together with the operating rod against the spring force of the latch spring. 5. The lock pull-out device X is provided in one space of the lock box 5 and the thumb-turn lock is prevented in the other space of the lock box 5 in one space of the lock box 5 based on the operating rod frame. A latch / pull-back device for a door lock, wherein members constituting the device Y are incorporated. In the fifth aspect, the thumb-turn lockout prevention device Y includes a release member for a thumb-turn dharma that engages with the operating rod, and when the indoor door is closed, when the latch hits the edge of the door frame and retreats, A release component member having an operation gear cooperates with the retreat of the operation rod to rotate the thumb turn derma, whereby one engagement portion 70a of the latch cam lock piece moves in the direction of disengagement. Latch and retract device for door lock.

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