JP5150134B2 - Latch lock for free door - Google Patents

Description

The present invention relates to a free door latch lock.

  Patent Document 1 discloses a latch provided with a locking piece that moves in a direction to release the restraint of the inversion latch in the latch frame against the spring force of the latch spring by the driving piece on the operation member side that extends into the lock box. The lock is listed.

  Further, in Patent Document 2, the operation piece side drive piece extending into the lock box restrains the reversible latch in the latch frame while repelling corresponding to the polarities of the first and second magnetic bodies. A latch lock with a locking piece that moves in the unlocking direction is described.

These latch locks described in Patent Documents 1 and 2 are free doors (basic doors) although the latches are restrained or released by one or more locking pieces with respect to the reversible latches incorporated in the latch frame. It cannot be applied to a door having an end pivoted and having a latch at the free end. Therefore, at present, the appearance of a latch lock that can be applied to a free door is expected on the assumption that an inversion latch is used. In that case, a device that does not hinder latching when the door is closed, an effective use of space, and the like are desired.
JP-A-11-141207 JP 2004-270132 A

  The first object of the present invention is that when the latch lock is attached to the free door, the latching can be reliably performed in the closed position. The second purpose is to effectively utilize the space in the lock box. The third object is that the engaging portions with respect to the reversing latch are rotationally symmetric, and each engaging portion corresponds to a receiving member composed of an inclined surface having a cam function and a flat surface having a radius. In addition, as an additional purpose, when the latch protrudes, the protrusions of the upper and lower latches work together to protrude.

The latch lock for a free door according to the present invention is against the spring force of the latch spring by the push-pull type operating member-side drive member extending into the lock box, or the first and second magnetic bodies. In a latch lock having a locking piece that moves in the direction of releasing the restraint of the inversion latch in the latch frame while repelling in accordance with the polarity, the inversion type latches 5A and 5B having the same configuration are provided in the latch frame 3. The upper and lower locking pieces 15A and 15B that are simultaneously engaged with and disengaged from the engagement receiving portions 9 of the upper and lower inversion latches are arranged so that the latching locking surfaces 6 are symmetrical with each other, the upper and lower trigger member which is controlled by the control spring with the trigger head 22 comprises an operating member for the locking means 24 of the push-pull to the horizontal rod part component 23 that extends so as to face the tip end portion 15a of the locking piece Advancing and retreating freely arranged in a box, when the free door is the door opening, the inverting latch is locked respectively engaged in said locking piece so as to protrude from the lock box, yet these inverted latch locking in the state, the upper and lower trigger member, the spring force by the via the operation member for locking means positioned displaced respectively towards and the push-pull protruding from lock box locking piece of the control spring Are each in a locked state.

(A) When the latch lock is attached to the free door, the latching can be reliably performed in the closed position (the latching function is not hindered). In particular, when the operation member is a push-pull method, even if the door is operated while pushing the handle, as long as the upper and lower latches do not enter the engagement hole of the receiving device at the same time, the engagement portion that forms the engagement hole ( Even if the tip portions of the upper and lower reversing latches slidably come into contact with the inclined surface and the round or flat surface of the side wall portion, the upper and lower reversing latches maintain their positions without reversing. Therefore, the upper and lower inversion latches always engage with the engaging holes of the receiving member in a latchable state. Further, as described in paragraph 0026, the push-pull type operating member locking means 24 is provided on the trigger members 21A and 21B, so that the push-pull type operating member 60 can be opened with the door Y opened. The locking piece can be locked so that the operation is disabled. In addition, when the free door is opened, the reversing latch is not reversed or retracted by locking the locking piece to the push-pull type operating member locking means 24 even when the reversing latch protrudes from the lock box. .
(B) By incorporating a plurality of latches into one latch frame, the space in the lock box can be effectively utilized.
(C) For example, the engaging portions of the left and right side wall portions are rotationally symmetric, and each engaging portion can correspond to a receiving member including an inclined surface having a cam function and a flat surface having a radius.

  The best mode for carrying out the present invention shown in FIGS. 1 to 11 will be described below (first embodiment).

(1) Environment for carrying out the invention X is a latch lock, and this latch lock X is fixed to the lock main body 1 attached to the door Y and the vertical frame of the door frame Z so as to face the latch of the lock main body. And a receptacle 50. The base end of the door Y is pivotally supported by a vertical frame of the door frame Z via a hinge and swings in the horizontal direction. The lock body 1 is fixed to the free end of the door Y.

  First, the configuration of the lock body 1 will be described. Reference numeral 2 denotes a lock box attached to the door Y with screws or the like. As is well known, the lock box 2 includes a case body 2a and a case lid 2b. The lock box 2 has a front plate, and a pair of unnumbered upper and lower latch openings is formed at the center of the front plate. Further, attachment holes for unfixed fasteners are formed in the upper and lower ends of the front plate. Furthermore, a pair of unnumbered upper and lower trigger openings is formed in a portion near the upper and lower ends of the front plate. The case body 2a and the case lid 2b of the lock box 2 are appropriately formed with a guide horizontal long hole and a guide vertical long hole for guiding the latch, the trigger member, and the engaging piece, respectively. Here, reference numerals and descriptions of detailed matters are omitted, and main members will be described.

(2) Latch frame Reference numeral 3 denotes a latch frame having a U-shaped vertical cross section fixed to the front center portion in the lock box 2, and a locking piece on a horizontal opposing wall positioned above and below the latch frame 3. A notch-shaped opening for receiving the end portions 15a and 15a of 15A and 15B is formed. In addition, a pair of upper and lower spring end support portions project from the inner surface of the vertical wall perpendicular to the horizontal facing wall.

  In the present embodiment, one latch frame 3 is disposed at the front center portion in the lock box 2, and the inside thereof is a horizontal guide extending from the center portion of the front plate to the center portion of the vertical wall of the latch frame 3. It is divided by a plate 4.

(3) Latches Reference numerals 5 </ b> A and 5 </ b> B are a pair of upper and lower latches arranged at the front center portion of the lock box 2. These latches 5A and 5B are inversion type latches, and are respectively disposed in the upper and lower latch openings of the front plate so that the rear ends thereof are accommodated in the latch frame 3. In addition, as shown in FIGS. 1 to 4, these latches 5A and 5B are based on the case when viewed from the free end surface of the door or when the horizontal sectional view of FIG. The latching locking surfaces 6 are arranged so as to be symmetrical to each other.

  Accordingly, in FIG. 1, the locking surface 6 of the upper latch 5A is located on the far side (in FIG. 4, the upper latch 5A is hatched), while the locking surface 6 of the lower latch 5B is on the near side. (The lower latch 5B is shown in phantom in FIG. 4).

  By the way, regarding the structure of the inversion type latch, for example, Japanese Patent Laid-Open Nos. 8-100159, 9-325248, 10-31173, 10-141207, and 2003- This is well known to those skilled in the art as described in Japanese Patent No. 74245.

  Therefore, here, a well-known matter will be briefly described. The inversion latch has a substantially rhombus shape in plan view, and includes the latching locking surface 6 described above, the inclined surface 7 with respect to the engaging portion 51 of the receiver 50, the stopper projection 8, the engagement receiving portion 9, and the like. doing. The upper and lower latches 5 </ b> A and 5 </ b> B are urged by the latch springs 11 in the direction protruding from the front plate of the lock box 2. Therefore, generally, when the door Y is opened and closed, the reversing latch is slidably brought into contact with the engaging portion of the receiving member, and is a flat gate-shaped latch receiver 10 fitted into the rear end portion (inner end portion) of the latch. And it reverses and advances / retreats via a latch spring (compression coil spring) 11.

  By the way, the upper and lower latches 5A, 5B of the present embodiment are linked in a pair and rotatable manner via a vertical reference shaft 12 provided in the center (new matter). Accordingly, in the present embodiment, the horizontal guide plate 4 described above is formed with a horizontal guide long hole 4a for the vertical reference shaft 12. If comprised in this way, there exists an advantage that upper and lower latch 5A, 5B cooperates and protrudes.

  The latches 5A and 5B and the latch receiver 3 are pressed and assembled by the latch spring 11, but relative rotation (inversion of the latch with respect to the latch receiver) is allowed. In addition, the latches 5A and 5B return to their original positions by the spring force of the latch spring 11 after reversing while reversing against the spring force of the latch spring 11 from the time of closing to the time of opening. . Furthermore, when the latches 5A and 5B are opened from the time of opening the door, for example, even if the door is operated while pushing the handle, the upper and lower latches 5A and 5B do not enter the engaging hole 52 of the receiving member 50 at the same time. Even if the front ends of the engaging portions (inclined surface 51a and rounded or flat surface 51b of the side wall portion) 51 that form the engagement holes slide in a collision state, the upper and lower reversing latches are reversed. Without changing the posture.

(4) Upper and lower rocking pieces Formed by folding the plate material in a T-shape (in the opposite direction, the opposite T-shape) in the vicinity of the upper and lower portions of the latch frame 3 in the lock box 2 when viewed from the front. The pair of upper and lower locking pieces 15A and 15B are arranged so as to be able to swing through a pair of upper and lower fixed shafts (for example, a fixed pivot) 16 and one movable connecting shaft 17. The thumb-shaped tip 15a can be engaged with the engagement receiving portion 9 of each latch through each opening of the upper horizontal wall and the lower horizontal wall of the latch frame 3.

  Further, the little finger-like rear end portion 15b extending from the front end portion 15a of the locking pieces 15A and 15B in a substantially horizontal state is in contact with the pressing engagement portion of the engagement action piece.

  Furthermore, the locking pieces 15A and 15B have arm portions 15c extending in the vertical direction substantially at the center, and the respective distal end portions of the overlapping arm portions 15c are connected to each other via an unnumbered elongated hole and the movable connecting shaft 17. Has been.

  In the above configuration, the upper and lower locking pieces are engaged not only when the door is closed but also when the door is opened, the tip 15a is engaged with the engagement receiving portions 9 of the upper and lower latches 5A and 5B. Unless the operation member 60 is operated, the upper and lower latches 5A and 5B are always restrained at the same time.

  In addition, when upper and lower engaging action pieces 31A and 31B, which will be described later, are present at their initial positions by their action springs 32, a pair of upper and lower pivots (in some embodiments, guide shafts) 16 are provided. Since the spring force of at least one of the locking springs 18 urges the upper and lower locking pieces 15A and 15B to engage with the latches, any of the engaging action pieces can be either internal or external. As long as the operating force of the operating member does not move in a predetermined direction against the spring force of the operating spring, the engagement receiving portions 9 of the upper and lower latches 5A and 5B are respectively connected to the distal ends of the upper and lower locking pieces 15A and 15B. It is locked by 15a.

  FIG. 1 shows that when the door is closed, the upper and lower latches 5A and 5B that are engaged in the engagement hole 52 of the receiving member (strike plate) 50 are projected by the tip portions 15a of the upper and lower locking pieces 15A and 15B. FIG. 2 shows a state in which the upper and lower latches 5A and 5B that have come out from the engagement holes 52 of the receiving member (strike plate) 50 are vertically locked when the door is opened. In addition to preventing the upper and lower locking pieces 15A and 15B from being rotated in the unlocking direction by the operating force of the operating member, the tip portions 15a of the pieces 15A and 15B are simultaneously restrained to the protruding position. Next, a state in which it is locked via the lock means 24 of the trigger member described below will be shown.

(5) Trigger members Reference numerals 21 </ b> A and 21 </ b> B are a pair of upper and lower trigger members disposed at the upper and lower ends of the front of the lock box 2. These trigger members 21A and 21B are respectively disposed in the upper and lower trigger openings of the front plate so as to be movable forward and backward. Since the upper and lower trigger members 21A and 21B have the same configuration, the description will be made with reference to the upper trigger member 21A in FIG.

  Now, the trigger member 21A of the present embodiment includes a trigger head 22 having a U-shaped cross section, a horizontal flange portion 23 extending from the trigger head 22 so as to face the distal end portion 15a of the locking piece 15A, and the horizontal flange For the operating member that is provided movably (slidably) on the portion 23 and that locks the locking piece 15A by engaging the locking piece 15A so that the operation member 60 cannot be operated with the door Y open. The lock unit 24 includes a plurality of control springs 25 and 26 disposed in the lock box 2 with respect to the lock unit 24 so as to control the position of the lock unit 24. In consideration of the object of the present invention, the control springs 25 and 26 are weaker than the control spring 26 on the front side (considering the timing of displacement of the locking means 24 when the door is opened and closed). ).

Thus, a horizontal roller 27 slidably contacting the receiving member 5 is pivotally supported on the trigger head 22. Further, as shown in FIG. 5, the locking means 24 has a donut shape or a five-yen coin shape, and is externally fitted to the rear end portion of the horizontal flange portion 23, and the outer peripheral surface thereof is a locking piece 15A. Can be directly engaged with and disengaged from the engagement portion (engagement surface) 19 on the back side.

  Further, the plurality of control springs 25 and 26 are a front control spring 25 interposed between the trigger head 22 and the lock means 24, and a spring end receiver fixed to the lock means 24 and the rear end portion inside the lock box. The control springs 26 are divided into rear control springs 26 interposed between them and the spring forces of the front and rear control springs 25 and 26 are appropriately set.

  Although not particularly illustrated, guide protrusions that engage with the horizontal guide slots formed in the case body 2a and / or the case lid 2b of the lock box 2 are provided at appropriate positions on the outer peripheral surface of the disk-shaped locking means 24. It has been. Further, the locking means 24 is appropriately mounted so as not to be detached from the rear end portion of the horizontal flange portion 23.

In the above configuration, the lock means 24 locks the trigger member 21A against the spring force of the rear control spring 26 when the roller 27 of the trigger head 22 is pressed against the receiving member 50 when the door is opened and closed. Since it moves backward into the box 2, the outer peripheral surface of the push-pull type operating member locking means 24 is disengaged from the engaging portion 19 on the back side of the locking piece 15A. In this embodiment, since the portion of the receiving member 50 that receives the roller 27 of the trigger head 22 is slightly swollen, the upper and lower trigger members 21A and 21B are simultaneously locked when the door is closed as shown in FIG. Retracting into the box 2, the upper and lower locking means 24 are separated from the respective back side engaging portions 19 and 19 of the upper and lower locking pieces 15A and 15B.

Therefore, when unlocking the upper and lower latches 5A and 5B in the temporarily locked state shown in FIG. 1, a key inserted into a cylinder lock (not shown), a thumb-turn cam member, a rotary operation member, a push-pull type The operating force of the operating member or the like causes the engaging action piece to move in a predetermined direction against the spring force of the action spring, and the pair of locking pieces 15A and 15B linked to the engaging action piece are moved up and down. It is necessary to make the tip 15a engage and disengage from the engagement receiving portions 9 of the upper and lower latches 5A and 5B.

  In this embodiment, when the door Y is opened in the closed state of FIG. 1, the push-pull type operating member 60 is pulled (pulled), for example. Then, the drive piece 62 provided so as to be linked to the shaft portion of the operation member 60 and extending into the lock box 2 through the opening 61 formed in the side wall of the lock box 2 is in a predetermined direction (in the embodiment, the vertical direction). ) And one of the engaging action pieces slides in a direction of pressing the rear end portion 15b of one locking piece (15A, 15B). Then, the upper and lower locking pieces 15 </ b> A and 15 </ b> B are swung with respect to the upper and lower fixed pivots 16. As a result, as described above, the upper and lower latches 5A and 5B are released from the temporarily locked state.

  On the other hand, when opening the door shown in FIG. 2, when an operator (not shown) pulls (pulls) the operation member 60 to the front side, for example, the door Y is generally pulled with the operation member 60 generally pulled. Pull to the front. Then, the pull state is finished, and the operation member 60 is released from the hand. Thus, as soon as the pull state is finished, the engaging action piece is returned to the initial position by the spring force of the action spring, so that the upper and lower locking pieces 15A and 15B are swung with respect to the upper and lower fixed pivots 16. The front end portions 15a engage with the engagement receiving portions 9 of the upper and lower latches 5A and 5B (restrain the latches).

On the other hand, when the roller 27 of the trigger head 22 comes out while being pressed against the receiving member 50, the trigger member 21A moves forward to the front plate side of the lock box 2 by the spring force of the control spring 26 on the rear side. The lock means 24 is displaced from the rear to the front. As a result, the outer peripheral surface of the push-pull type operating member locking means 24 enters the engaging portion 19 on the back side of the locking piece 15A and engages with the engaging portion 19 to completely disengage the locking piece 15A. Lock it. Therefore, the operation member 60 cannot be operated when the door is opened.

(6) Engagement action pieces Reference numerals 31 </ b> A and 31 </ b> B are a pair of upper and lower engagement action pieces arranged on the rear side inside the lock box 2. With reference to FIG. 7, the upper and lower engaging action pieces 31A and 31B and the upper and lower action springs (return springs) 32 will be described. Since the upper and lower engaging action pieces 31A and 31B have the same configuration, here, the upper engaging action piece 31A will be described as a reference.

  33 is a vertical plate having a guide projection 33a on the outer surface of the central portion, 34 is a horizontal plate connected to the upper end portion of the vertical plate 33 in the crossing direction, and has a small projection-like spring end support portion 34a on the inner surface, Reference numeral 35 denotes an engaging portion that is formed at the lower end portion of the vertical plate 33 so as to project into an end face U shape.

  Thus, one horizontal wall of the engaging portion 35 has a small protrusion-like spring end support portion 35 a that receives one end portion of the action spring 32. Further, the other horizontal wall of the engaging portion 35 has an engaging surface 35b that comes into contact with the drive piece 62, and a portion that engages with a vertical guide elongated hole formed in the side wall of the lock box 2 at the tip thereof. It has become.

  As shown in FIGS. 1 and 2, the upper and lower engaging action pieces 31 </ b> A and 31 </ b> B configured as described above are locked so that the U-shaped engaging portions 35 sandwich the two driving pieces 62 in the vertical direction. It is slidably disposed in the box. The upper action spring 32 is disposed between the horizontal plate 34 of the upper engagement action piece 31A and the engaging portion 35 of the lower engagement action piece 31B corresponding to the counterpart, while the lower action spring 31 32 is disposed between the horizontal plate 34 of the lower engaging action piece 31B and the engaging portion 35 of the upper engaging action piece 31A corresponding to the counterpart.

(7) Receiver FIG. 4, FIG. 8 thru | or FIG. 10 shows an example of the receiver 50 corresponding to the lock main body 1. FIG. The lock body 1 of the present embodiment is constructed by incorporating inversion latches 5A and 5B having the same configuration positioned vertically in one latch frame 3 so that the latching locking surfaces 6 are symmetrical to each other. Therefore, one vertical elongated hole-like engaging hole 52 is formed at a position corresponding to the center of the free end of the swinging door Y, that is, at the center of the receiving member 50. Therefore, the left and right side wall portions of the engagement hole 52 are the engaging portions 51 for latching.

  By the way, the left and right engaging portions 51 are rotationally symmetric, and are composed of two engaging portions that are divided vertically. That is, with reference to FIG. 10 and the like of a sectional view based on the line 10-10 in FIG. 8, one (left side) engaging portion 51a is an inclined cam surface on which the latch locking surface (tip) 6 is slidably contacted. The other (right side) engaging portion 51b is an angled cam surface (flat surface having a rounded shape) with which the inclined surface 7 of the latch is slidably contacted. In addition, the engaging portion 51a of the one inclined surface is slightly depressed closer to the bottom wall 53 side than the engaging portion 51b of the flat surface having the other radius in the swinging direction of the door. Since the left and right engaging portions 51 are rotationally symmetric, when the upper and lower latches 5A and 5B fall (enter) into the engagement holes 52, the locking surfaces 6 of the latches 5A and 5B are simultaneously Opposing vertical receiving surfaces 52a and 52a are also diagonally inner surfaces.

  Further, the receiving tool 50 of the present embodiment is formed with curved bulged portions 54 for receiving the rollers 27 of the upper and lower trigger members 21A and 21B, respectively, near the upper and lower ends of the surface 50a. In addition, although the engagement hole 52 of the receiving tool 50 of the present invention is formed in the center portion, depending on the position (design) of the upper and lower latches, two engagement holes 52 may be formed in the center portion in the vertical direction. Also good.

  In this embodiment, a latch lock having a locking piece that rotates in a direction to release the restraint of the inversion latch in the latch frame against the spring force of the latch spring by the driving piece on the operation member side that extends into the lock box. However, the latch spring can be replaced with a magnetic material.

For example, the first magnetic body of the S pole and the N pole is attached to the back side of the locking piece in the horizontal direction, while the S is provided in the horizontal direction on the bottom wall inner surface and / or the upper wall inner surface of the lock box with a required gap. When the locking pieces 15A, 15B are separated in the direction of disengagement by the pressing force of the engaging action piece (the rotation method and the lifting method are used to release the latch). The locking pieces 15A and 15B are configured to move in a direction to release the restraint of the inversion latch in the latch frame while repelling corresponding to the polarities of the first magnetic body and the second magnetic body. May be.
In the case of the above replacement example, the fixed shaft 16 is a movable shaft guided by the vertical slot. In addition, the shape of the horizontal flange portion 23 of the upper and lower trigger members 21A and 21B is formed in an elongated plate or ridge that can move horizontally between the first magnetic body and the second magnetic body.

  Therefore, in the case of the embodiment of the magnetic body, that is, the embodiment provided with the locking piece that moves in the direction of releasing the restraint of the inversion latch in the latch frame while repelling corresponding to the polarities of the first and second magnetic bodies. In the case of the example, when the doors are opened, when the tip portions 15a of the locking pieces 15A and 15B restrain (lock) the engagement receiving portions 9 of the upper and lower latches 5A and 5B, respectively, 2 The protrusion-shaped operating member locking means 24 enters (interrupts) the gap between the magnetic bodies.

  In addition, the engaging action pieces 31A and 31B of the present embodiment move by a predetermined amount in the vertical direction through the guide protrusions engaged with the vertical guide elongated holes formed in the lock box 2. Of course, depending on the design, the engaging action pieces 31A and 31B move horizontally. You may make it move to a direction. Further, the form (configuration) of the engaging action pieces 31A and 31B is also a matter that can be arbitrarily changed in design. Further, the drive piece 62 extending into the lock box 2 described above moves in the vertical direction in the present embodiment, but moves in the horizontal direction when the engaging action piece moves in the horizontal direction. Therefore, the moving direction of the engaging action pieces 31A and 31B and the driving piece 62 is not an essential matter of the invention.

Furthermore, when it adds about the relationship between the horizontal hook part 23 of trigger member 21A, 21B, and the locking means 24 provided in this horizontal hook part 23, in this Example, the locking means 24 is a movable type which slides in a horizontal direction. However, it may be a movable type that rotates in the circumferential direction in accordance with the advance and retreat of the trigger member.

  As an embodiment in the latter case, although not particularly illustrated, the horizontal flange portion 23 is formed in a screwed state, is screwed into the horizontal screw portion 23, and the back side of the locking pieces 15A and 15B is placed at appropriate positions on the outer periphery. A rotating plate type locking means 24 having an engaging projection for engaging and disengaging with the engaging portion 9 is mounted. Further, the horizontal hook portion 23 is formed into a rack form, and is engaged with the horizontal rack hook portion 23, and engaging protrusions that are engaged with and disengaged from the engaging portions 9 on the back side of the locking pieces 15A and 15B at appropriate positions on the outer periphery. The pinion member may be supported as appropriate. Further, instead of the pinion member, the central portion of the square-shaped crank is appropriately supported, and the base end portion of this crank is appropriately supported by the horizontal flange 23, while the free end of the crank The portion can be engaged with and disengaged from the engagement portion 9 on the back side of the locking pieces 15A and 15B. Thus, the movable locking means 24 may be provided directly or indirectly on the horizontal flange portion 23 of the trigger members 21A and 21B.

  In addition, the relationship between the horizontal hook portion 23 and the locking means 24 can theoretically be fixed by changing the shape of the engagement portion 9 on the back side of the locking pieces 15A and 15B and the locking means 24. It is.

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

FIG. 1 to FIG. 11 are explanatory views showing the best embodiments of the present invention.
Schematic longitudinal cross-sectional explanatory drawing at the time of closing. The schematic longitudinal cross-sectional explanatory drawing at the time of door opening. Explanatory drawing which shows notionally the relationship of each member of this invention. Schematic cross-sectional explanatory drawing (plan view) when the door is closed. Explanatory drawing of the principal part (locking means). Explanatory drawing of each member (a latch, a locking piece, an engagement action piece, etc.). Explanatory drawing of the principal part (engagement action piece, the drive piece by the side of an operation member). The front view of a receptacle. Left side view. FIG. 10 is a sectional view taken along line 10-10 in FIG. 8; Schematic explanatory drawing which shows the sliding contact relationship between the engaging part of a receiving tool, and a latch.

X ... latch lock, Y ... door (free door), Z ... door frame, 1 ... lock body, 2 ... lock box, 3 ... latch frame, 4 ... horizontal guide plate, 5A, 5B ... latch, 6 ... latch engagement Stop surface, 7 ... Inclined surface of latch, 8 ... Stopper projection, 9 ... Engagement receiving portion, 10 ... Latch receiver, 11 ... Latch spring, 12 ... Vertical reference shaft, 15A, 15B ... Locking piece, 15a ... Tip 15b: rear end, 15c: arm, 16 ... shaft, 17 ... movable connecting shaft, 18 ... locking spring, 19 ... dorsal engagement portion, 21A, 21B ... trigger member, 22 ... trigger head, 23 DESCRIPTION OF SYMBOLS ... Horizontal hook part, 24 ... Locking means for operation members, 25 ... Weak control spring, 26 ... Strong control spring, 27 ... Roller, 27a ... Outer peripheral surface, 31A, 31B ... Engagement action piece, 32 ... Action spring (return spring) ), 33... Vertical plate, 34... Horizontal plate, 35. 35a ... Spring end support part, 50 ... Receiver, 50a ... Surface of the receiver, 51 ... engagement part, 51a ... engagement part (inclined surface), 51b ... engagement part (flat surface), 52 ... engagement A hole, 52a ... vertical receiving surface, 53 ... bottom wall, 54 ... bulge part, 60 ... operating member, 61 ... opening, 62 ... drive piece.

Claims (4)

A latch frame that pushes against the spring force of the latch spring or repels in response to the polarity of the first and second magnetic bodies by the drive piece on the push-pull type operating member side that extends into the lock box In the latch lock having a locking piece that moves in a direction to release the restraint of the inversion type latch, the inversion type latches 5A, 5B having the same configuration are latched in the latch frame 3 with the latching surfaces 6 for latching each other. The upper and lower locking pieces 15A and 15B that are incorporated so as to be symmetrical to each other and that are simultaneously engaged with and disengaged from the engagement receiving portion 9 of the upper and lower inversion latches are disposed. a horizontal rod part component 23 that extends to face disposed forward and backward movement freely up and down the trigger member to lock box controlled by the control spring with an operation member for locking means 24 of the push-pull to the own When the door is open door, the inverting latch is locked respectively engaged in said locking piece so as to protrude from the lock box, moreover In these inverted latch locking state, the upper and lower trigger member , characterized in that the locking piece through the respective positional displacement to and operating member for the locking means of the push-pull in a direction to protrude from the lock box by the spring force of the control spring in the locked state; Latch lock for free door .
2. The free door latch lock according to claim 1, wherein the inversion latches 5A and 5B are arranged in one latch frame.
2. The latch lock for a free door according to claim 1, wherein the control spring for the trigger member includes two types of springs having weak spring force and strong springs.
2. The free door latch lock according to claim 1, wherein the upper and lower inversion latches are linked in a pair via a vertical reference shaft.

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