JP2010024781A - Latch lock of door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a latch lock of a door which has an effect of preventing lockout, makes possible the easy combination of members, can miniaturize a lock box, is inexpensive, and can reduce the number of part items. <P>SOLUTION: The latch lock of the door is provided with a latch, a latch operation lever, a handle cam, and a slider lock piece. The latch is always projected from the lock box, and the latch operation lever makes forward and backward movement together with the latch. The handle cam is incorporated into the lock box by an energizing means, and pulls back the latch based on the operation force of an operating handle of a door. The slider lock piece is engaged with the handle cam and locks the handle cam when it slides in the direction of an engagement pressing part formed at the latch operation lever by the operation a force of the indoor operation member. Even if the slider lock piece is brought into a state that it locks the handle cam at the time of opening of the door, the slider lock piece of the latch lock of the door is pushed back in the direction of lock release by the engagement pressing part when the latch moves backwardly due to sliding contact between the tip of the latch and the edge of a strike at the time of the closing of the door. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a door latch lock.

  In FIGS. 1 and 9 of Patent Document 1, a latch operating rod is used as a reference, and a member constituting the latch pull-back device X is provided in one space of the lock box 5, while a thumb turn is provided in the other space of the lock box 5. It is disclosed that members constituting the lockout prevention device Y are incorporated. The thumb-turn lockout prevention device Y includes a thumb-turn dharma release component (72, 72A) that engages with the latch operating rod (50, 50A), and the release configuration of the first embodiment shown in FIG. The member (72) is a lever (73) pivotally supported so that the engaging claw engages with the engaged surface (55) of the lever relief notch (54) formed in the latch operating rod (50). The slider (74) for releasing the lock piece that is linked to the lever and slides in the horizontal direction, the thumb turn dharma (71) that is connected so as to be linked to the slider, and the bias means for the thumb turn dharma.

  Further, the release component (72A) of the second embodiment shown in FIG. 9 has an engaging claw portion on the engaged surface (55A) of the lever relief notch (54A) formed on the latch operating rod (50A). The first operating gear (73A) pivotally supported to engage, the second operating gear (74A) meshing with the first operating gear (73A), and the thumb turn dharma (71A) meshing with the second operating gear It consists of and.

  The release constituent member (72) of the first embodiment and the release constituent member (72A) of the second embodiment are both handle cams that cooperate with a handle shaft (31) that is rotated by an internal and external operation lever. (Latch cams 30 and 30A) are not directly locked (locked), but the lock members (70 and 70A) for directly locking the handle cams (30 and 30A) are, for example, rearward in the lock box. It was supported separately.

Therefore, the Latham turn lock (latch lock) of Patent Document 1 has a large number of members constituting the lockout prevention device Y and is linked in a complicated manner, so that the combination of the members is not easy. There was a point that should be improved, such as being unable to reduce the size. At the same time, it was expected to improve the operability of the indoor operation member corresponding to the thumb turn. Note that Patent Document 2 also discloses an example of a lockout prevention device. Moreover, the code | symbol is a thing of a patent document.
JP 2004-204662 A Japanese Patent Application Laid-Open No. 2004-16211

  The intended object of the present invention is to obtain the effect of preventing the lock-out as in Patent Document 1 and Patent Document 2. The second object is to obtain advantages such as easy combination of members, miniaturization of the lock box, and low cost.

  The latch lock of the door of the present invention is incorporated in the lock box together with a biasing means, a latch urged by a latch spring so as to always protrude from the lock box, a latch operating rod that moves forward and backward together with the latch, and a biasing means. A handle cam that pulls back the latch based on the operating force of the operating handle; and when the sliding force is applied by the operating force of the indoor operating member in the direction of the engaging pressing portion formed or provided on the latch operating rod, the handle cam is engaged. And a slider lock piece for locking the handle cam. When the door is opened, even if the slider lock piece is in a state of locking the handle cam, the front end of the latch is closed when the door is closed. When the latch moves backward due to sliding contact with the frame or the edge of the strike, the slider lock piece is pushed in the unlocking direction via the engagement pressing portion. Is the fact characterized.

(A) With a simple configuration, the slider lock piece is unlocked when the door is closed. In other words, the latch 5 having the latch operating rod 6 and the slider lock piece 8 that slides in the direction of releasing the locking of the handle cam 7 based on the backward movement of the latch 5, the anti-squeeze mechanism is provided. Since it comprised, the advantage that the combination of members is easy, a lock box can be reduced in size, and it is cheap can be acquired.
(B) The invention according to claim 2 is provided with an operation plate having a push arm on the indoor operation member, and can have a so-called thumb-turn function. Therefore, for example, a slider lock piece in a lock box by a push-pull method. 8 can be displaced.
(C) In the invention described in claim 3, since the metal cover has a lock portion that engages and disengages with the drive arm of the handle cam, the slider lock piece 8 can be made tough.
(D) The invention described in claim 4 can improve the ease of processing, the operability, and the like. Further, the indoor operation member including the operation plate can be prevented from protruding from the wall surface of the door.
(E) The invention according to claim 5 can facilitate the cooperation between members.

  Hereinafter, the best mode (first embodiment) for carrying out the present invention shown in FIGS. 1 to 12 will be described.

(1) Basic Configuration / Operation of the Present Invention FIG. 1 is a schematic explanatory diagram showing an environment for implementing the present invention. The present embodiment is a latch lockout prevention mechanism X attached to a free end of an open door (hereinafter referred to as “door”) 3 that opens and closes an opening (entrance / exit) of a door frame 1.

  This lock-out prevention mechanism X is intended to reduce the number of constituent members as much as possible. Basically, the lock box 4 attached to the free end portion of the door 3 and the front end portion from the front 18 of the lock box. Is incorporated in the inner space on one side of the lock box 4 with the biasing means 38 with reference to the latch 5 biased by the latch spring 19 so as to always protrude and the latch operating rod 6 that moves forward and backward together with the latch. A handle cam (latch cam) 7 that pulls back the latch 5 when the handle shaft 20 rotates in a predetermined direction based on the operation force of the operation handle 60 inside and outside the door 3, and is incorporated in the internal space on the other side of the lock box 4. When the hand slides in the direction of the engagement pressing portion 22 formed or provided on the latch operating rod 6 by the operating force of the operating plate 64 of the indoor operating member 61 corresponding to the thumb turn, And a slider locking piece 8 to lock the handle cam engaged with the drive arm 36 of the cam 7.

  Then, when the door 3 is opened, a result of inadvertently operating the operation plate 64 of the indoor operation member 61 corresponding to the thumb turn and vertically moving the slider lock piece 8 in the direction in which the handle cam 7 is locked. Even when the handle cam 7 is locked, when the door 3 is closed, if the leading end 5a of the latch 5 is in sliding contact with the edge of the door frame 1 or the strike 2, the latch 5 moves backward. The slider lock piece 8 is pushed back in the unlocking direction by an engagement pressing portion (for example, an inclined pressing surface) 22 of the latch operating rod 6. Hereinafter, specific requirements of the present invention will be sequentially described, but detailed matters will be omitted from the drawings and the description thereof.

(2) Description of Environment in FIG. 1 FIG. 1 shows a state in which the door 3 is closed and the indoor operation plate 64 corresponding to the thumb turn is not operated. At this time, the latch 5 biased by the latch spring 19 and the latch operating rod 6 provided integrally with the latch return to the initial position, and the slider lock piece 8 corresponding to the release member It has already been pushed back in the unlocking direction due to the backward movement.
Therefore, when a person outside the door 3 operates the operation handle on the outdoor side, the handle cam (latch cam) 7 is rotated by the handle shaft 20, so that the person can enter the room (for example, a toilet).

  When a person is in the room, when the operation plate 64 is operated (for example, pushed), the slider lock piece 8 is displaced downward by the pressing force of the push arm 65, and the slider lock piece 8 At the same time that the hook-shaped receiving portion 41b is engageable with the engaging pressing portion (for example, its inclined pressing surface) 22 of the concave notch 21 of the latch operating rod 6, the locking portion of the slider lock piece 8 (Example) Then, the end surface of the locking bottom wall 53 of the metal cover 42 engages with the drive arm 36 of the handle cam 7 to lock the handle cam 7 so as not to rotate in a predetermined direction.

  Here, with reference to FIG. 1, the main part of this invention is demonstrated easily. 1 is a door frame, 2 is a strike of a receiving device, 3 is a door, 4 is a lock box installed at the free end of the door, X is provided in the lock box 4, and the main member is “d article” It is a configured anti-lockout mechanism. Here, the “main member” refers to the latch 5 having the latch operating rod 6 and the slider lock piece 8 that slides in the direction of releasing the locking of the handle cam 7 based on the backward movement of the latch 5.

(3) Lock box 4
The lock box 4 includes a case body 4a shown in FIG. 4 and a case lid 4b shown in FIG. In FIG. 4 and FIG. 5, the coupling means (for example, a male screw and a female screw) which are detailed matters are omitted. As shown in FIGS. 4 and 5, the case body 4a and the case lid 4b are formed with a first horizontal guide portion (horizontal long hole) 11 for the latch operating rod 6 at the center thereof.

  A vertical guide portion (vertical long hole) 12 for the slider lock piece 8 is formed in the central portion on the upper side of the lock box 4 with reference to the first horizontal guide portion 11. A shaft hole 13 for a fixed guide shaft is formed on the right side of the lock box 4 with respect to the vertical guide portion 12. A vertical window 14 for the push arm 65 of the indoor operation member is formed directly above the shaft hole 13.

  On the other hand, the handle shaft 20 penetrates and a fitting hole 15 into which the handle cam 7 is fitted is formed in a portion near the right end portion on the lower side of the lock box 4 with respect to the first horizontal guide portion 11. Has been. Further, below the fitting hole 15, a second horizontal guide portion (horizontal long hole) 16 for the cam press contact body 38 b constituting the urging means 38 is formed.

  In addition, the lock box 4 has a U-shaped notch in which an unnumbered guide member for the latch 5 is fitted, a storage portion for storing stopper means (for example, click means) 55 for the slider lock piece 8, and a seat plate. Mounting holes and the like are appropriately formed.

  In FIG. 4, reference numeral 17 denotes a long plate-like front mounting plate, and this front mounting plate 17 is combined with the front 18 as shown in FIG. 1.

(4) Latch 5 and latch actuating rod 6
The front end portion (engaging head) 5 a of the latch 5 always protrudes from the front 6 due to the spring force of the latch spring 19. In this embodiment, the latch 5 is a latch bolt type that is integrally coupled to the latch operating rod 6 via its latch connecting shaft 5b. Therefore, when the latch 5 is retracted, the latch operating rod 6 is also locked together. Retreat into box 4.

  As shown in FIG. 1, the latch 5 can be pulled back by the handle cam 7 on condition that the slider lock piece 8 is separated from the latch operating rod 6. In addition, when the slider lock piece 8 is separated from the handle cam 7, the inner and outer operation handles can be rotated in a predetermined direction (clockwise in FIG. 1), and the handle cam 7 and the handle cam 7 rotate in the predetermined direction. When moved, the latch 5 is moved backward together with the latch operating rod 6 by the drive arm of the handle cam 7.

  Here, the configuration of the latch 5 and the latch operating rod 6 will be described with reference to FIG. The latch 5 includes a front end portion 5a and a latch connecting shaft 5b provided integrally with the front end portion 5a, and the front end portion 5a is in contact with the slanted shape in contact with the edge of the door frame 1 or the strike 2. A contact surface or an engagement surface that intersects the inclined sliding contact surface and is locked by the strike 2 when the door is closed, and a rear wall surface orthogonal to the engagement surface.

  The latch connecting shaft 5b has a hook-like fitting portion that is provided at the rear end thereof so as to be connected to the annular groove. As long as the latch 5 has a function of retreating against the edge of the door frame 1 or the like when the door is closed, its form and function are not particularly limited. Therefore, an inversion latch that rotates while moving backward may be used. In the present embodiment, the latch 5 is integrally combined with the latch operating rod 6 via the latch connecting shaft.

  Thus, the latch operating rod 6 is formed in the shape of a long rod in this embodiment, and a notch recess 21 having an engagement pressing portion (for example, an inclined pressing surface) 22 is formed in a substantially central portion thereof. ing. Further, small protrusions 23 that engage with the first horizontal guide portion 11 of the lock box 4 are provided at appropriate positions on the side surface (front side in FIG. 1) and the rear surface (the other side in FIG. 1) of the latch operating rod 6. It has been.

In addition, an L-shaped stopper 25 is provided on the bottom surface of the latch operating rod 6 so as to collide with the sound deadening elastic body 24 fixed in the lock box. Furthermore, an engagement notch groove 26 through which the drive arm 36 of the handle cam 7 passes is formed at the rear end portion of the rear surface. In addition, the rear end of the latch operating rod 6 is provided with a protrusion 27 that supports the tip of the latch spring 19. (5) Handle cam 7 and urging means Next, referring to FIGS. The structure of the handle cam 7 will be described. The handle cam 7 is fitted in the fitting hole 15 of the case body 4a and the case lid 4b, and cooperates with the handle shaft 20 by an operating force on a lever handle that is rotatably provided on the inner and outer wall surfaces of the door 3, for example. And rotate a predetermined amount.

  Thus, 32 is a cylindrical fitting portion (hub) having an angular shaft hole through which the handle shaft 20 passes, 33 is an annular sliding contact portion provided continuously with the peripheral wall of the cylindrical fitting portion 32, and 34 is an annular sliding contact. An engaged portion 36 that is formed to project in a fin shape in the radial direction from a part of the portion 33, and is also formed to project in a fingertip shape in a direction opposite to the engaged portion 34 from a part of the annular sliding contact portion 33. Drive arm.

  In this embodiment, a claw portion 37 that engages with the slider lock piece 8 is formed at the tip of the drive arm 36. In the lower part of the lock box, a biasing means 38 for the handle cam 7 is disposed, and in this embodiment, it is composed of a spring 38a and a cam pressure contact body 38b.

(6) Slider lock piece 8
Next, the configuration of the handle cam 7 will be described with reference to FIGS. The slider lock piece 8 is engaged with at least the engagement receiving portion 41a that engages with the push arm 65 provided in the indoor operation member, and the engagement pressing portion 22 of the latch operating rod 6 that is connected to the engagement receiving portion. It has a hook-shaped receiving part 41b to be removed and is guided in the vertical direction by the lock box 4.

  In this embodiment, considering the ease of processing and toughness, the slider lock piece 8 is integrally fitted to the slider main body 41 and the slider main body 41, and the driving arm of the handle cam 7 is used. 36 and a metal cover 42 having a lock portion to be engaged and disengaged.

  First, the configuration of the synthetic resin slider body 41 will be described. For example, referring to FIG. 8, reference numeral 41 a is an engagement receiving portion having a block shape in a vertical state, and the engagement receiving portion 41 a has an engagement hole 43 that engages with at least the push arm 65 of the indoor operation member. Is formed. In the present embodiment, the engagement hole 43 is formed on the upper end portion side of the engagement receiving portion 41a, and a guide shaft (fixed shaft) provided laterally on the lock box 4 on the lower end portion side of the engagement receiving portion 41a. ) 44 is formed in the vertical guide slot 45 to be engaged.

  Reference numeral 41b denotes a hook-like receiving portion that is formed to protrude below one side surface (vertical surface) of the engagement receiving portion 41a. The downward end of the hook-like receiving portion 41b has an inclination of the latch operating rod 6. Engaged portion (for example, opposed inclined surface, small roller supported on the horizontal axis, etc.) 46 engaged with or disengaged from the engagement pressing portion 22 (for example, small roller supported on the horizontal axis, opposed inclined surface, etc.) Is formed or provided.

  Furthermore, guide protrusions 47 that engage with the vertical guide portions 12 of the lock box 4 are provided at appropriate positions on the front side and the back side of the hook-shaped receiving portion 41b. The wall surface on the lower end side of the engagement receiving portion 41a is appropriately cut out 48 in order to attach the metal cover 42 integrally.

  In addition, a wavy engagement groove 49 is formed continuously on the rear wall on the upper side of the engagement receiving portion 41a so as to be engaged with and disengaged from a click ball constituting a stopper means (for example, a click means comprising a spring and a press-contact ball) 55. Has been.

  Next, the configuration of the metal cover 42 will be described with reference to FIG. The shape of the metal cover 42 is a design change matter that can be appropriately formed. For example, the metal cover 42 is joined to the lower wall surface of the engagement receiving portion 41a so as to fit into the notch 48 of the engagement receiving portion 41a. A vertical fitting wall 51 having a vertical guide long hole 52 coinciding with the vertical guide long hole 45, and a locking bottom formed by bending one end portion (lower end portion in the embodiment) of the vertical fitting wall 51 in an orthogonal direction. The wall 53 and a plurality of support arms 54 formed by bending the left and right ends of the vertical fitting wall 51 in the same manner, and at least one end surface 53a of the locking bottom wall 53 is a drive arm of the handle cam 7. It is a lock part engaged with the nail | claw part 37 of this.

(7) Indoor Operation Member Next, the indoor operation member 61 will be described with reference to FIG. This is an example in which an inner operation handle (for example, a lever handle) 60 and an indoor operation member 61 are independently provided on a wall surface 3 a on the indoor side of the door 3. The operation plate 64 constituting the indoor operation member 61 is operated from the inside of the room and corresponds to a so-called thumb turn. In this embodiment, in consideration of operability, aesthetics of the design, etc., the indoor operation member 61 is A mounting base 62 that is provided along the inner wall of the door and is rectangular in appearance, a rectangular operating plate 64 that is supported in the opening of the mounting base via a support shaft 63, and the center of the inner surface of the operating plate 64 This is a push-pull method comprising a push arm 65 provided integrally with the part.

(8) Operation FIG. 11 shows that, as a result of operating (for example, pushing) the indoor operation member 61 in the unlocked state of FIG. 1, the slider lock piece 8 is moved to a predetermined position and the handle cam 7 is locked. It is explanatory drawing. Also, FIG. 12 shows that when the door 3 is opened, the indoor operation member 61 is inadvertently operated (for example, pushed). As a result, the slider lock piece locks the handle cam, and then the door is closed. When the latch 5 moves backward due to the sliding contact between the edge of the door frame 1 or the strike 2, the slider lock piece 8 moves in the unlocking direction via the engagement pressing portion 22 of the latch operating rod 6. It is explanatory drawing which showed pushing back simply.

  In the embodiment shown in the embodiment of the present invention, the latch 5 and the latch operating rod 6 of the present embodiment are integrally connected to each other. However, the latch connecting shaft 5b of the latch 5 is long. A notch recess 21 having an engagement pressing portion 22 may be formed on the latch connecting shaft 5b (this is also the same invention).

  Further, in this embodiment, as shown in FIG. 10, when the operation plate 64 is operated (for example, pushed), the slider lock piece 8 is displaced downward by the pressing force of the push arm 65, and the slider lock piece 8 is moved. The hook-shaped receiving portion 41b of the latch operating rod 6 can be engaged with the engagement pressing portion (for example, the inclined pressing surface) 22 of the recess-like notch 21. The slider lock piece 8 may be configured to be displaced in a predetermined direction by the pressing force of the pressing arm 65.

  Furthermore, in this embodiment, the rear wall of the engagement receiving portion 41a of the slider body 41 constituting the slider lock piece 8 is engaged with and disengaged from the click ball constituting the stopper means (for example, the click means comprising a spring and a press-contact ball) 55. However, the stopper means is not limited to a click ball, a click spring or the like, but may be an elastic body, a wedge body or the like as long as it has a stopper function. There may be. The stopper means may be provided on the indoor operation member 61.

  The present invention is mainly used in the locksmith and joinery industries.

1 to 12 are each explanatory views showing the best embodiment of the present invention.
Explanatory drawing of the state which the lock | rock of the slider lock piece was cancelled | released when the door was closed. FIG. 2 is a schematic cross-sectional explanatory diagram taken along line 2-2 in FIG. 1. 3-3 schematic cross-sectional explanatory drawing of FIG. The front view of a case body. The front view of a case lid. Explanatory drawing of a latch, a latch action | operation lever, and a handle cam. Explanatory drawing which shows the structure of a slider lock piece. Explanatory drawing of a slider main body. Explanatory drawing of a metal cover. Explanatory drawing of the indoor operation member 61. FIG. FIG. 3 is an explanatory diagram in which the slider lock piece 8 engages the handle cam 7 in the unlocked state of FIG. 1. Schematic explanatory drawing which shows the effect | action of the principal part.

Explanation of symbols

X ... prevention prevention mechanism, 1 ... door frame, 2 ... strike, 3 ... door, 4 ... lock box, 4a ... case body, 4b ... case lid, 5 ... latch, 5a ... tip (engaging head), 5b ... Latch connecting shaft, 6 ... Latch operating rod, 7 ... Handle cam (latch cam), 8 ... Slider lock piece, 11 ... First horizontal guide part (horizontal long hole), 12 ... Vertical guide part (vertical long hole), 13 ... shaft hole, 14 ... vertical window, 15 ... fitting hole, 16 ... second horizontal guide portion (horizontal long hole), 17 ... front plate, 18 ... front, 19 ... latch spring, 20 ... handle shaft, 21 ... notch Recess, 22 ... engagement pressing portion, 23 ... small projection, 24 ... elastic body, 26 ... engagement notch groove, 27 ... projection, 32 ... cylindrical fitting portion (hub), 33 ... sliding contact portion, 34 ... Engagement part, 36 ... drive arm, 37 ... claw part, 38 ... biasing means, 41 ... slider body, 41a ... engagement receiving part , 41b ... saddle-shaped receiving portion, 42 ... metal cover, 43 ... engagement hole, 44 ... guide shaft (fixed shaft), 45 ... vertical guide long hole, 46 ... engaged portion, 47 ... guide projection, 48 ... Notch, 49 ... engaging groove, 51 ... vertical fitting wall, 52 ... vertical guide slot, 53 ... locking bottom wall, 53a ... locking part, 54 ... support arm, 55 ... stopper means, 60 ... inner operation handle , 61 ... Indoor operation member, 62 ... Mounting base, 63 ... Support shaft, 64 ... Operation plate, 65 ... Push arm.

Claims (5)

A latch that is urged by a latch spring so as to always protrude from the lock box, a latch operating rod that moves forward and backward together with the latch, and an urging means that is incorporated in the lock box and that is based on the operating force of the operation handle of the door. A handle cam that pulls back the latch, and a slider that engages the handle cam and locks the handle cam when slid by the operating force of the indoor operation member in the direction of the engagement pressing portion formed or provided on the latch operating rod. Even if the slider lock piece locks the handle cam when the door is opened, the tip of the latch is in sliding contact with the door frame or the edge of the strike when the door is closed. When the latch is moved backward due to the slider, the slider lock piece is pushed back in the unlocking direction via the engagement pressing portion. Latch lock. 2. The slider lock piece according to claim 1, wherein the slider lock piece includes at least an engagement receiving portion that engages with a push arm provided on the indoor operation member, and an engagement pressing portion that is connected to the engagement receiving portion and that is connected to the latch operating rod. A latch lock for a door having a hook-shaped receiving portion that engages with and disengages from the door and being guided in a vertical direction by a lock box. 3. The slider lock piece according to claim 1, wherein the slider lock piece is made of a metal having a synthetic resin slider body, a lock portion that is integrally fitted to the slider body, and is engaged with and disengaged from the drive arm of the handle cam. A door latch lock characterized by comprising a cover. In Claim 1, the indoor operation member corresponding to the thumb turn is provided on a mounting base provided along the inner wall of the door, an operation plate pivotally supported on the mounting base, and an inner surface of the operation plate. A door latch lock comprising a push arm, wherein the slider lock piece is displaced in a predetermined direction when the operation plate is pushed or pulled. The door latch lock according to claim 1, wherein the latch and the latch operating rod are of a latch bolt type provided integrally.

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