JP5122928B2 - Locking device for latch lock - Google Patents

Description

  The present invention relates to a locking device for a latch lock that is attached to a door of a joinery and can achieve “prevention of lockout” and “prevention of confinement”.

  Patent Documents 1 and 2 disclose a latch mechanism using an inversion latch proposed by the applicant. Patent Document 3 is a door lock proposed by another company. In FIG. 8 and the like, when the locking state of the locking member in the latch frame is released, the latch can be moved back into the lock box while rotating. The effect (door lock using a reverse latch) is described. Thus, when the door is opened, when the latch is released from the latch by the locking member or the lock piece, the matter that can be retracted while rotating is a well-known matter.

  On the other hand, in Patent Document 4, a horizontal actuating rod is provided in the lock box so as to be movable backward in the horizontal direction behind the latch, and a release component for thumb turn dharma that engages with the horizontal actuating rod is incorporated. When the door is closed, when the latch hits the edge of the door frame and moves backward, the release component cooperates with the backward movement of the horizontal actuating rod to move the drive arm of the thumb turn dharma from the lock piece with the return spring. An apparatus for preventing the lock-out of the thumb turn lock of the indoor door is disclosed in which the latch cam lock piece moves in the direction of disengagement.

  This Patent Document 4 is disclosed by the applicant. The intended purpose of the invention of Patent Document 4 is to unlock keys by operating keys, pins, etc. in the case of so-called inner locks in indoor doors provided at the entrances and exits of rooms such as toilets and bedrooms. Therefore, it is troublesome, and when the indoor door is closed, when the latch moves backward, the thumb turn lock is automatically unlocked.

The object of the invention described in Patent Document 4 is novel in the field of locks. However, a release component that is associated with the horizontal operating rod is a lever that is pivotally supported so that the engaging claw portion of the tip portion engages with the engaged surface of the lever relief notch formed on the horizontal operating rod. In addition, since the front end portion is provided so as to be engaged with one end portion of the lever and the slider slides in the horizontal direction, there is a problem that the structure is slightly complicated. Therefore, it is an object of the invention to create a simpler prevention device.
Japanese Patent Application Laid-Open No. 8-100559 JP-A-11-141207 No. 7-26527 JP 2004-204660 A

  The intended purpose of the present invention is to simplify the structure and prevent “locking out” and “confinement”.

The locking device for a latch lock according to the present invention includes a reversing latch 11 provided in a lock box, a latch spring 12 positioned at the rear end of the reversing latch, and a horizontal movable back against the spring force of the latch spring. An operating rod 13, an inverted latch lock piece 14 pivotally supported in the lock box, an arcuate engaged portion 14a formed at the rear end of the inverted latch lock piece , and the horizontal operating rod An engagement portion 22 having an engagement protrusion 22a that is provided in between and in sliding contact with the arcuate engagement portion , an abutment portion 23 that abuts against a pushing portion 13a formed on the horizontal operating rod, and the abutment portion in the Dharma 15 having a spring end connecting portion 24 continuously provided, with one end to the spring end connecting portion is connected, the other end is connected to the spring end support members 16 in the lock box, and the dharma click function which is displaced to the unlocked position from the locked position with the A locking device latch lock and a spring having the inverting latch, and retraction into the door frame side closing force receiving the lock box 3 from the horizontal operating rod in conjunction with the retraction When There retracted movement, said with dharma becomes unlocked state by being pressed by the pressing portion of the horizontal operating rod,該解lock state is held by the spring force of the spring with the click function, also for the inverting latch The lock piece 14 is characterized in that the reversing latch 11 is unlocked by the engagement protrusion 22a slidingly contacting the arcuate engaged portion 14a .

  The problem of Patent Document 1 can be solved. That is, since the release function of the release component of Patent Document 1 is replaced with “Dalma”, a latch device for a latch lock having a simple structure as much as possible can be proposed. Accordingly, it is possible to obtain advantages such as improvement of the component combination work and reduction of cost. In addition, according to the present invention, the structure can be simplified to prevent “lock-out” and “confinement”.

  Hereinafter, the best mode for carrying out the present invention shown in FIGS. 1 to 5 will be described.

(1) Description of FIGS. 1 to 3 First, with reference to FIGS. 1 to 3, the basic concept of the locking device X for the lockout latch for locking out will be described. FIG. 1 shows an unlocked state when the door is closed, and a person (an operator (not shown)) who has entered a toilet or a room in the room has not yet rotated the dharma in the locking direction (counterclockwise). In this unlocked state, for example, the toilet door may be opened by anyone outside. On the other hand, even after the operator leaves the toilet, the unlocked state shown in FIG. FIG. 2 shows a state in which, for example, the operator is operating the thumb turn dharma in the locking direction (in this case, the thumb turn knob is operated) in order to make a so-called use.

  In this case, the same applies when the operator operates the cylinder dharma in the locking direction from the outside of the toilet with the key. FIG. 3 shows a state in which the operator is working in the toilet, that is, because the thumb dharma is displaced from the unlocked position to the locked state together with the biasing spring. Indicates locked state. In this case, as described above, the same applies to the case where the operator operates the key from outside the toilet or the like. As described above, the locking device X of the latch lock according to the present invention always unlocks even when the latch is retracted into the lock box by receiving the component force from the edge of the door frame on the inclined surface when the door is closed. It becomes a state.

(2) Environmental Description In FIGS. 1 to 3, 1 is a door, 2 is a door frame, and 3 is a lock box. Further, the environmental part related to the present invention will be described briefly. 4 is a door frame bracket, 5 is an edge of the door frame including the bracket 4, 6 is a front member of the lock box, and 7 is the center of the front member. It is a latch frame fixed to the part. As is well known, the lock box 3 is composed of an unnumbered case body and a case lid, and has a rear wall 8 with respect to the front member 6. In this specification, the lock box 3 has the horizontal guide 9 and the arc-shaped guide 10 on the wide side wall, but detailed description of the lock box 3 and the latch frame 7 including the latch frame 7 is omitted. The lock box 3 and the latch frame 7 are appropriately provided with a shaft hole, a mounting hole, a guide notch portion, a mounting column, a horizontal actuating notch portion, and the like. Further, in addition to the present invention, a power transmission means for the handle member, an engagement means, and the like are appropriately disposed in the lock box 3.

(3) Basic constituent members Hereinafter, main constituent members of the present invention will be disclosed. Reference numeral 11 denotes an inversion type latch provided at the center of the front 6, and this inversion type latch 11 is also referred to as a “latch head”. When the door is opened, if the rotation in the inversion direction (horizontal direction) is allowed, While moving back into the lock box. Further, even when the door is not allowed to rotate in the reverse direction when the door is closed, it can be retracted into the lock box in a locked state. In addition, the specific configurations of the locking surface, the inclined surface, the support shaft on the inner end side, the locked portion, and the like on the protruding tip end side of the inverted latch 11 are described in Patent Document 1, Patent Document 2, and the like. Since it is true, I will not explain the detailed structure here.

  Reference numeral 12 denotes a latch spring positioned at the rear end of the inversion-type latch 11. The front end of the latch spring 12 is supported by a spring end support at the rear end of the inversion-type latch 11, while the other end is operated horizontally. It is supported by the spring end support portion at the tip of the collar 13. In addition, the latch spring 12 is elastically mounted between a recess at the rear end portion of the inversion type latch 11 and a front end portion of the horizontal operating rod 13 that has entered the cutout portion of the central wall of the latch frame 7.

  Reference numeral 13 denotes a horizontal operating rod disposed behind the latch spring 12 so as to be guided by a horizontal guide 9 provided on the wide side wall of the lock box 3. The horizontal operating rod 13 is configured such that the inversion type latch 11 is disposed on the door frame side. The transmission slider is retracted by the spring force of the latch spring 12 when receiving a component force from the edge 5 (herein, referred to as “door closing force”) and retracting into the lock box. In this embodiment, a pushing portion 13a for dharma projects from the side surface of the substantially central portion of the horizontal operating rod 13. Thus, in this embodiment, at least the inversion type latch 11, the latch spring 12, and the horizontal operating rod 13 are arranged in series in the lock box 3 from the front 6 side to the rear wall 8 side. .

Reference numeral 15 denotes a dharma (a thumb turn dharma or / and a cylinder dharma) that is pivotally supported between the reversing latch lock piece and the horizontal operating rod. On the other hand, from the outdoor side, the thumb-turn knob is rotated in the locking direction by the operating force of an operating member such as a key that forms the cylinder lock. Here, the configuration of the dharma 15 will be described with reference to FIGS. 4 and 5.

Reference numeral 21 denotes a central portion of the dharma 15, and an axial engagement hole on the operation member side is formed in the central portion 21 in the axial direction. Reference numeral 22 denotes an engaging portion that extends radially outward from the center of the outer peripheral wall of the central portion 21 of the dharma 15 and has an engaging protrusion 22a that is in sliding contact with the rear end portion of the reversing latch lock piece 14. is there. In this embodiment, the engaging protrusion 22a moves along the curvature of the receiving surface of the arcuate engaged portion 14a formed at the rear end portion of the reversing latch lock piece 14. For example, the engaging portion 22 looks like the left thumb and index finger are opened. The curvature of the receiving surface of the arcuate engagement portion 14a, based on the support shaft 18 of the inverting latch-lock piece 14, the inverted latch-lock piece 14 is set appropriately so that it can be rotated ing.

Reference numeral 23 denotes a vertical abutting portion that extends radially outward from the center of the outer peripheral wall of the central portion 21 of the dharma 15 and abuts against the pushing portion 13 a of the horizontal operating rod 13. Is located in the direction opposite to the engagement protrusion 22a as shown in FIG. Further, the dharma 15 has a projecting pin-shaped spring end connecting portion 24 at a radially outward connecting portion that is provided continuously with the contact portion 23.

  Reference numeral 16 denotes an attachment column-shaped spring end support member provided near the rear wall 8 of the lock box 3. The biasing spring 17 has one end 17 a connected to the spring end connecting portion 34 of the dharma 15 and the other end 17 b connected to the spring end supporting member 16 of the lock box 3. This urging spring 17 is also called a “glass spring having a click function”, and the other end portion 17b is always in a predetermined position, but the one end portion 17a and the center portion 17c that looks like a ring are moved from the unlocked position to the locked position. It is displaced to. In other words, the urging spring 17 in the form of glasses having a click function is displaced from the locked position to the unlocked position together with the dharma engaging protrusion 22a.

(4) Operation The main operation will be described with reference to FIGS. As described in the section (1), FIG. 1 shows an unlocked state when the door is closed. When the door is closed, the reversing latch 11 moves backward when receiving a door closing force from the door frame 2 side. As a result, the horizontal operating rod 13 is retracted to the rear wall 8 side of the lock box 3 together with the inverted latch 11 by the spring force of the latch spring 12. When the horizontal operating rod 13 moves backward in cooperation with the inversion type latch 11, the dharma 15 is pushed by the pushing portion 13a of the horizontal operating rod 13 to be unlocked. At this time, the unlocked state of the dharma 15 is held by the spring force of the biasing spring 17 that has been displaced with the dharma.

  In FIG. 1, one end portion 17 a of the biasing spring 17 is guided by the arcuate guide 10 of the lock box 3 and is displaced from the upper side to the lower side. On the other hand, in FIG. 3, since the operator operated the dharma 15 via an operating means (not shown), after passing through the process of FIG. 2, the position is displaced from the unlocked position to the locked state together with the biasing spring. It shows that the latch 11 is locked at the tip 14 of the lock piece 14.

  As described above, the locking device X of the latch lock according to the present invention is such that when the door is closed, the latch 11 receives the component force from the edge 5 on the door frame side on the inclined surface and retreats into the lock box. Since it is always in the unlocked state, it is possible to prevent “locking out” and “confinement”.

  In the example shown in the embodiment of the invention, the central member of the present invention is the dharma 15. However, the form of the dharma 15 is within a range in which the intended purpose of the present invention can be obtained. However, the design can be arbitrarily changed.

  The present invention is mainly used in the joinery and lock industry.

1 to 5 are explanatory views showing the best embodiment of the present invention.
Explanatory drawing of the unlocked state at the time of a door closing. The explanatory view of the halfway state which is operating in the locking direction in the state of FIG. Explanatory drawing which became the locked state from the unlocking position of FIG. Front view of Dharma. FIG. 5 is a right side view based on FIG. 4.

X ... Latch lock device, 1 ... Door, 2 ... Door frame, 3 ... Lock box, 4 ... Receptacle, 5 ... Edge of door frame, 6 ... Front member, 7 ... Latch frame, 8 ... Rear wall, DESCRIPTION OF SYMBOLS 9 ... Horizontal guide, 10 ... Arc-shaped guide, 11 ... Reversing latch, 12 ... Latch spring, 13 ... Horizontal operating rod, 13a ... Pushing part, 14 ... Lock piece for reversing latch, 14a ... Arc-shaped engaged part, 15 ... Dalma, 16 ... Spring end support member, 17 ... Biasing spring, 17a ... One end, 17b ... Other end, 17c ... Center, 18 ... Support shaft, 21 ... Center, 22 ... Engagement part, 22a ... Engagement projection, 23 ... contact part, 24 ... spring end connection part.

Claims (2)

An inversion type latch 11 provided in the lock box, a latch spring 12 positioned at the rear end of the inversion type latch, a horizontal operating rod 13 that can move backward against the spring force of the latch spring , and a shaft in the lock box The reversing latch lock piece 14 that is supported, the arcuate engaged portion 14a formed at the rear end of the reversing latch lock piece , and the horizontal operating rod , and the arcuate engagement member. engagement portion 22 having an engaging projection 22a which sliding contact with the engaging portion, wherein the horizontal operating rod in contact with the pressing portions 13a formed in the abutment portion 23, the spring end connecting portion 24 continuously provided on the contact portion and Dharma 15 having, along with one end to the spring end connecting portion is connected, the other end is connected to the spring end support members 16 in the lock box, and to unlock position from the lock position with said dharma displacement latch lock and a spring having a click function of A click apparatus,
The inverting latch and then retraction into the door frame side closing force receiving the lock box 3 from the horizontal operating rod in conjunction with the retraction is retraction, pushing the dharma horizontal operating rod The unlocked state is pushed by the portion, and the unlocked state is held by the spring force of the spring having the click function, and the reverse latch lock piece 14 has the engagement protrusion 22a with the arc-shaped cover. A locking device for a latch lock , wherein the locking of the inversion type latch 11 is released by slidingly engaging the engaging portion 14a .
3. When the door is closed, when the operator operates the dharma, the dharma is displaced from the unlocked state to the locked state together with the spring having a click function , and at the same time, the reverse-type latch lock piece is moved in the locking direction. And the latching device of the latch lock, wherein the latching portion of the tip end portion engages with the engaged portion of the rear end portion of the inversion type latch.

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