JP2008291595A - Latch lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a latch lock capable of closing a door with an operating member left in a locked state in the open state of a free door and surely exhibiting a latching function. <P>SOLUTION: The latch lock comprises a receiving implement for a latch on the door frame side, and a lock body in which upper and lower noninverting type latches disposed in a lock case on the free door side so that inclined faces and locking faces are in a state of facing in the opposite directions to each other, retreat inward into the lock case through a driving member operated by the operating force of an operating member and through an engaging action member cooperating with the driving member. A trigger member is disposed in a freely advancing/retreating manner in the lock case. The trigger member comprises, at a horizontal rod part, a locking means for the operating member controlled by a control spring in the lock case. The locking means moves into a position where the engaging action member is constrained when opening the door, and moves into a position where the constraint of the engaging action member is released when closing the door. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a latch lock for a free door.

  Patent Document 1 and Patent Document 2 include a latch in which two top and bottom non-reversing latch tips that are attached to a fixed side and are attached to a free end of a free door are engaged and disengaged. "Receivers for locks" are described respectively.

  Here, Patent Document 1 will be particularly described. The latch lock including the receiver of Patent Document 1 has the following configuration (including the reference numerals in the publication).

  That is, this latch lock includes (A) a latch receiving member (50) attached to the fixed side, and two non-reversible latch members (40a, 40b) which are attached to the swing door side and are vertically movable and paired vertically. (B) The latch receiving member 50 includes a latch head housing portion (52a, 52b) and a latch head housing portion corresponding to the latch members (40a, 40b) from the center in the swinging direction of the door. The latch engaging portions (51a, 51b) are symmetrically provided on the right side in the swing direction of 52a and the left side in the swing direction of the other latch head accommodating portion 52b, and (C) the tip of the latch member is formed. The latch head (41a, 41b) includes a locking surface portion (42a, 42b) that contacts and latches with the latch locking portion, and an inclined surface portion (43a, 43b) that contacts and sinks into the latch locking portion (51a, 51b). The swinging direction of the door consisting of (D) The locking surface portions (42a, 42b) of one latch head (41a) and the other latch head (41b) are latched and latched with the door closed. They are located on the side of the part (51a, 51b) and are symmetrical to each other.

  1 and 2 of Patent Document 1, a cam member (drive member 30) having a cam claw (32) that rotates a predetermined amount in a predetermined direction by an operation force of the operation member is provided in the lock box. An end face U-shaped latch immersing member (engaging member 20) that moves backward into the lock box by the driving force of the cam member, and upper and lower non-reciprocating members that move back into the lock box via the latch immersive member. Inverted latch members (40a, 40b) are shown.

  Therefore, Patent Document 1 states that “the latch receiving member 50 attached to the door frame side, the driving member 30 attached to the free door and operated by the operating force of the operating member, and the engagement operation cooperating with the driving member. That is, a latch lock composed of a lock body in which a pair of upper and lower latches 40a and 40b are moved backward in the lock box via the member 20 is disclosed.

  When the latch lock having the above structure is opened, for example, when a handle type operation member is turned clockwise (FIG. 2 of Patent Document 1), the latch immersing member (engagement member) 20 is the rear wall of the lock box. The upper and lower latch members (40a, 40b) are pulled back toward the inside of the lock box by the engaging claws (22a, 22b) of the arm portion of the latch retracting member. This operation mode is the same when the operation member is operated when the door is opened. That is, in the invention described in Patent Document 1, the operation member moves when the door is opened.

  By the way, in the case of a latch lock in which the door is a free door and the inclined surfaces 43a and 43b of the pair of upper and lower latches 40a and 40b are opposite to each other, the operation member is generally operated (rotated or swung). However, when the free door is to be closed, if the operation member does not rotate or swing, it can be closed simply by pushing the operation member as it is or simply pulling it forward. Improved operability).

Therefore, at present, there is a demand for the appearance of a latch lock that can be closed while the operation member is locked in the open state of the free door and that reliably performs the latching function.
JP 2006-233462 A JP 2006-233706 A

  An intended object of the present invention is to open a latch lock provided with a non-inverted latch for a free door, so that the operation member can be closed while being locked, and a latching function can be ensured. It is to provide a latch lock to exert. The second object is preferably that the operation member can be unlocked at the moment when the door is closed. The other is to rationally combine the members to reduce the number of components.

  The latch lock of the present invention includes a latch holder on the door frame side and an upper and lower non-inverted latch disposed on the lock box on the free door side so that the inclined surface and the locking surface are in opposite directions. A latch lock comprising a drive member that is activated by the operating force of the operation member and a lock body that moves backward in the lock box through an engagement member that cooperates with the drive member. A trigger member is disposed so as to be movable back and forth, and the trigger member is provided with a locking means for an operation member controlled by a control spring in the lock box at a horizontal hook portion. It moves to the position which restrains a joint action member, On the other hand, it moves to the position which releases the restraint of an engagement action member at the time of a door closing.

  In addition, the latch lock of the present invention is a non-inverted top and bottom that is disposed on the door frame side latch holder and the lock box on the free door side so that the inclined surface and the locking surface are in opposite directions. In the latch lock, the mold latch includes a drive member that is operated by an operation force of the operation member, and a lock body that moves backward in the lock box through an engagement member that cooperates with the drive member. A trigger member is disposed in the box so as to be movable back and forth, and the trigger member is pivotally supported by the lock box so as to be linked to the horizontal hook portion, and includes a lock means for an operation member controlled by a control spring in the lock box. The locking means moves to a position for restraining the engaging action member when the door is opened, and moves to a position for releasing the restraint of the engaging action member when the door is closed. To do.

  In the open state of the free door, the door can be closed while the operation member is in the locked state, and the latching function is reliably exhibited. In addition, since the invention according to claim 1 includes the control spring, the side wall portion (engagement portion) is not at the stage where the upper and lower non-inverted latches abut against the edge portion of the side wall portion of the receiving device. The operation member can be unlocked (unlocked) at the moment of getting over and entering the engagement hole (the moment of closing the door).

  Hereinafter, the best mode (first embodiment) for carrying out the present invention shown in FIGS. 1 to 10 will be described.

(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 door Y is a free door whose base end 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 3, and the upper and lower latch openings are formed on the front plate 3 near the center and on the lower end side. Further, an attachment hole for an unnumbered fastener is formed at the upper end portion of the front plate 3. Further, an unnumbered trigger opening is formed on the upper end side of the front plate 3.

  Note that a latch guide 4 for appropriately guiding the upper and lower non-inverted latches 5A and 5B is provided on the distal end side of the lock box 2 as appropriate. Further, a guide horizontal long hole for guiding the trigger member 21 and the engaging action piece 15 is formed. Here, reference numerals and descriptions of detailed matters are omitted, and main members will be described.

(2) Latch guide 4
The upper and lower latch guides 4 have horizontal opposing walls that are positioned above and below, respectively. Further, for example, a locking piece for latching (not shown) can be disposed in the lock box 2, so that a notch-like numbered opening for receiving the claw-like tip of the locking piece is formed in the horizontally opposed wall. Has been. Furthermore, the upper and lower latch guides 4 serve as stoppers for receiving the respective distal end portions of the upper and lower arm portions of the engagement member 15 in this embodiment.

(3) Latch 5A, 5B and latch spring 11
Reference numerals 5 </ b> A and 5 </ b> B are a pair of upper and lower latches disposed in front of the lock box 2. These latches 5A and 5B are non-inverted normal latches. These normal latches 5 </ b> A and 5 </ b> B are respectively disposed in the upper and lower latch openings of the front plate 3 so that the rear ends thereof are guided by the latch guide 4. Moreover, as shown in FIG. 3, these normal latches 5A and 5B are such that the latching locking surface 6 and the inclined surface 7 are positioned symmetrically with respect to each other when viewed from the free end surface of the door. It is arranged.

  Therefore, in FIG. 1, the locking surface 6 of the upper latch 5A is located on the far side, while the locking surface 6 of the lower latch 5B is located on the near side. In contrast, the inclined surface 7 of the upper latch 5A is located on the near side, while the inclined surface 7 of the lower latch 5B is located on the far side.

  Therefore, these normal latches 5A and 5B have the same configuration as the upper and lower latch members of Patent Document 1. Therefore, the configuration of the latches 5A and 5B will be briefly described. Here, for convenience of explanation, the front engaging portion having the locking surface 6 and the inclined surface 7 is referred to as a latch front end portion 8, and the rear side engagement extending in a horizontal direction (connected) to the latch front end portion 8. The joint portion is referred to as a latch rear end portion 9.

  Thus, the latch tip 8 of this embodiment gets over the engaging portion 51 of the receiving member 50 from the time of opening the door to the time of closing. On the other hand, the latch rear end portion 9 has a laterally recessed cutout portion, and the claw portion of the arm portion 15b of the engagement member 15 is engaged with the cutout portion with a margin. Here, “margin” means that the latch tip 8 resists the spring force of the latch spring 11 when the latch tip 8 climbs over the engagement hole 52 while slidingly engaging the engaging portion 51 of the receiving member 50 from the time of opening to closing. It means the required gap that can be retracted.

  In other words, a pair of upper and lower spring end support pieces 12 are fixedly provided on the upper side and the lower side of the central portion of the lock box 2, respectively, and the spring end support pieces 12 and the latch rear end portions of the latches 5A and 5B are provided. The upper and lower latch springs 11 are respectively disposed between the end faces 9.

  Accordingly, since the upper and lower latches 5A and 5B are always urged by the latch spring 11 in a direction protruding from the front plate 3 of the lock box 2, the spring force of the latch spring 11 when the door is closed from the time of opening. After retreating against this, the spring force of the latch spring 11 returns to the original position.

(4) Driving member 14 and engaging action piece 15
The lock body 1 has a drive member 14 that is activated by the operating force of the operating member. In this embodiment, the drive member 14 is a cam member. The hub 14a to which the shaft of the operation member 60 is fitted, the first engagement protrusion 14b extending radially outward from the outer periphery of the hub 14a, and the first engagement protrusion 14b. Each has a second engagement protrusion 14c provided on the outer periphery of the hub 14a at a predetermined interval from the first engagement protrusion 14b.

  The lock body 1 has one or a plurality of engaging members 15 that cooperate with the drive member 14. The engaging member 15 of this embodiment is formed in a U-shape when viewed from the front as shown in FIGS. 1 and 2 and is guided by the lock box 2 so that it can be moved in the horizontal direction by the drive member 14. Yes.

  In other words, 15 a is a vertical receiving portion, and the rear surface of the receiving portion 15 a receives the tip ends of a pair of upper and lower return springs 16. On the other hand, the front surface of the receiving portion 15 a receives the fingertip-shaped first engaging protrusion 14 a of the cam member 14.

Reference numeral 15b denotes upper and lower arm portions extending in a direction orthogonal to the upper and lower end portions of the receiving portion 15a and forward. As shown in FIG. 4, engaging claws 17 that engage with the rear end portion 9 of the latch are formed at the tip portions of these arm portions 15 b. In addition, guide protrusions 18 that engage with a horizontal long hole (not shown) of the lock box are provided at each intermediate portion of the upper and lower arm portions 15b.
Furthermore, in the present embodiment, an engagement portion (notch portion, engagement groove, etc.) 19 for an engagement capturing piece 31 to be described later is formed at the distal end portion of the upper arm portion 15b. Reference numeral 20 denotes a stopper that engages with the second engagement protrusion 14 c of the drive member 14.

(5) Trigger member Reference numeral 21 denotes one trigger member disposed on the front plate 3 of the lock box 2. The trigger member 21 is disposed in a trigger opening on the upper end side of the front plate 3 so as to be movable forward and backward. Two rigger members 21 may be arranged depending on the design. It can also be arranged in the middle of the front plate 3.

  Now, the trigger member 21 of the present embodiment includes a trigger head 22 having a U-shaped cross section, and a horizontal hook portion extending from the trigger head 22 so as to face the tip of the upper arm portion 15b of the engaging action piece 15. 23 and the upper arm provided directly and indirectly (this embodiment) so as to be movable (slidable) on the horizontal saddle portion 23 and disabling the operation of the operation member 60 with the door Y opened. The operating member locking means 24 that engages with the engaging portion 19 of the portion 15b to lock the engaging action piece 15, and the lock box 2 with respect to the locking means 24 so as to control the slide position of the locking means 24. It consists of a plurality of control springs 25 and 26 disposed therein.

  In consideration of the secondary purpose of the present invention, the front control spring 25 is weaker than the rear control spring 26 (the position displacement of the lock means 24 when the door is opened and closed). Timing).

  Thus, a horizontal roller 27 that is in sliding contact with the receiving member 50 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 its outer peripheral surface 24a is engaged. It is possible to press against the engagement portion (engagement surface) on the back side of the capture piece 31.

  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 shown, 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 locations on the outer peripheral surface 24a of the bowl-shaped locking means 24. Is provided. 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.

(6) Engagement capture piece 31
In the present embodiment, the hook-shaped locking means 24 is engaged through an engagement capturing piece 31 that is rotatably disposed between the arm portion 15 b above the engaging action member 15 and the locking means 24. The working member 15 is brought into a restrained or unconstrained state.

  The engagement capturing piece 31 is, for example, an L-shaped engagement / disengagement lever having a bent fingertip, and its base end portion 31 a is pivotally supported by the horizontal shaft 32, while the free end portion 31 b is the engagement action member 15. This is a claw-shaped capturing portion that can be engaged with and disengaged from the notched engaging portion 19 of the upper arm portion 15b. The horizontal shaft 32 is wound around a biasing spring 33 that biases the engagement capturing piece 31 in a predetermined direction (non-capturing direction, disengagement direction).

(7) Main action: When opening the door, from opening to closing The main action will be described with reference to FIGS. 1 and 2 and FIG. FIG. 2 shows a state when the door is opened. 6A and 6B show a state in which the door Y is closed by operating the operation member 60 from the open state of FIG.

  First, when the door is opened as shown in FIG. 2 and FIG. 6A, the trigger member 21 moves forward because it is separated from the engaging portion 51 of the receiving tool 50. Then, the hook-shaped lock means 24 controlled by the control springs 25 and 26 is displaced forward and presses the back side of the engagement capturing piece 31. As a result, the engagement capturing piece 31 engages with the engagement portion 19 of the arm portion 15 b of the engagement member 15 against the spring force of the biasing spring 33. At this time, since the outer peripheral surface 24a of the hook-shaped locking means 24 regulates the engagement capturing piece 31, the operation member 60 cannot be rotated or swung as a result. That is, (a) of FIG. 6 shows that the locking means 24 has moved to a position where the engaging member is restrained via the engagement capturing piece 31 when the door is opened.

  Therefore, for example, when the operation member 60 is of a push-pull method, when the operation member 60 is pushed, the operation member 60 does not rotate or swing, and the free door rotates to the closed position.

  At that time, the leading end portions 8 and 9 of the upper and lower latches are brought into sliding contact (impact contact) with an engaging portion (an inclined surface of the side wall portion and a round or flat surface) 51 that forms an engaging hole 52 of the receiving member 50. However, the upper and lower latches maintain their postures (not reversed), move back as they are against the spring force of the latch spring 11, get over the engaging portion 51, and engage the receiver 50. Simultaneously enters the hole 52.

  FIG. 6B shows a state in which the upper and lower latches 5 </ b> A and 5 </ b> B are closed when the latches 52 are inserted into the engagement holes 52. When the door is closed, the trigger head 22 of the trigger member 21 is brought into pressure contact with the edge, flat surface, or raised portion of the receiving member 50, and thus moves backward into the lock box 2. As a result, the front control spring 25 is in a contracted state for a moment, and then the front control spring 25 is immediately restored. As a result, the locking means 25 slides on the horizontal hook portion 23 and the engagement capturing piece 31 The position of the base end 31a is displaced.

  Therefore, in this embodiment, the operating member 60 cannot be rotated unless the upper and lower latches simultaneously enter the engaging hole 52 of the receiving member 50. Therefore, the upper and lower normal latches are simultaneously engaged with the engaging holes 52 of the receiving member 50 in such a manner that they can always be latched.

  By the way, when the lock body 1 is provided with a locking piece (not shown) for the upper and lower latches 5A and 5B, when the upper and lower latches 5A and 5B in the temporarily locked state are unlocked, they are inserted into a cylinder lock (not shown). The locking piece linked to the engaging member 15 is moved in a predetermined direction against the spring force by operating force such as a key, thumb-turn cam member, rotary operating member, push-pull operating member, etc. And it is necessary to simultaneously disengage those tip portions from the engagement receiving portions of the upper and lower latches 5A and 5B, but this embodiment is omitted because it is not a limiting requirement of the invention.

  In this embodiment, the operation member 60 is a lever-type handle, but may be a push-pull type. In addition, when the door Y is opened in the closed state of FIG. 1, the push-pull type operation member 60 is pulled (pulled), for example. Then, the drive piece that is provided so as to be linked to the shaft portion of the operation member 60 and extends into the lock box 2 through the opening formed in the side wall of the lock box 2 moves in a predetermined direction (for example, the horizontal direction). Of course, the engaging member 15 may be configured to move in a predetermined direction against the spring force of the return spring 16.

(8) Receiver FIG. 7 to FIG. 10 show an example of the receiver 50 corresponding to the lock body 1. In the lock body 1 of the present embodiment, one trigger member 21 is disposed on the upper end side of the front plate 3 of the lock box 2 so as to be movable forward and backward, and is disposed on a portion near the center of the lock box 2 and on the lower side. Since the upper and lower latches 5A and 5B are incorporated in the set of latch guides 4 so that the latching surface 6 and the inclined surface 7 for latching are symmetrical to each other, The engaging holes 52 and the like are also formed so as to correspond to the upper and lower latches of the lock body 1 and the trigger member 21.

  By the way, the left and right engaging portions 51 corresponding to the upper and lower latches are respectively rotationally symmetric and include two engaging portions 51a and 51b which are divided vertically.

  For example, referring to FIG. 9, one (left side) engaging portion 51a is an inclined cam surface (inclined surface) with which the latch locking surface (tip) 6 is in sliding contact, and the other (right side) engaging portion. The mating portion 51b is an angle-shaped cam surface (a flat surface having a rounded shape) with which the inclined surface 7 of the latch is in sliding contact.

  In addition, as shown in FIG. 8, the engaging portion 51a of the one inclined surface is slightly lowered toward the bottom wall 53 side than the engaging portion 51b of the flat surface having the other rounded surface. 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.

  In this section, in the first embodiment, the relationship (design change example) between the horizontal hook portion 23 of the trigger member 21 and the locking means 24 provided on the horizontal hook portion 23 will be described. In addition, the design change example is positioned as the second embodiment and the third embodiment of the main part, the same reference numerals are given to the same parts as the first embodiment, and the overlapping description is omitted.

  In the first embodiment, “the trigger member 21 is disposed in the lock box 2 so as to be able to move forward and backward, and the trigger member 21 is locked to the horizontal flange portion 23 by the control springs 25 and 26 in the lock box. The locking means 24 is moved to a position where the engaging action member 15 in the lock box interior is constrained via the engagement catching piece 31 pivotally supported in the lock box 2 when the door is opened. On the other hand, when the door is closed, the engagement action member 15 moves to a position where the restraint is released.

  The configuration of the second embodiment shown in FIGS. 11A and 11B is basically the same as that of the first embodiment. However, the operating member locking means 24 of the first embodiment is arranged horizontally with the trigger member 21. The lock means 24A according to the second embodiment is a U-shaped movable body provided at the rear end portion of the horizontal collar portion 23 of the trigger member 21A, whereas the collar-shaped movable body is slidably provided on the collar portion 23. It is a point of being a “character-shaped” engaging lever linked to (for example, engaging) the engaging portion 41 having a shape and pivotally supported by a horizontal shaft 42 horizontally mounted on the lock box.

  In other words, the bent engaging lever as the locking means 24A is engaged with the central portion thereof being pivotally supported by the horizontal shaft 42 and having one end portion entering the engaging portion 41 of the horizontal flange portion 23. The other end is engaged with and disengaged from the stepped engagement portion 43 on the back side of the engagement capturing piece 31A.

  Therefore, in the second embodiment, the locking means 24A includes, in a narrow sense, the engaging portion 41 of the horizontal flange portion 23 of the trigger member 21 and the step-like engagement on the back side of the engaging portion 41 and the engagement capturing piece 31A. The engaging lever 24A is pivotally supported via a horizontal shaft so as to be interposed between the engaging portion 43 and an engaging capturing piece 31A that engages and disengages with the engaging lever 24A. In a broad sense, at least a trigger member 21 is an engagement lever 2 that is pivotally supported by the lock box so as to be linked to the lock box 21 and is engaged with and disengaged from the engagement portion 43 on the back side of the engagement capturing piece 31A that is pivotally supported by the lock box.

  In the second embodiment, the engaging lever 24A is pivotally supported on the lock box so as to be indirectly linked (linked) to the trigger member 21A, not directly to the trigger member 21A. Can achieve its intended purpose.

  Next, FIGS. 12A and 12B are a second design modification example of the first embodiment. For convenience of explanation, the terms and symbols of the second embodiment are used as they are. The locking means 24A of the third embodiment shown in FIG. 12 is the same as that of the second embodiment in that it is an engagement lever having a “shape” that is pivotally supported by a horizontal shaft 42 that is horizontally mounted on the lock box. is there. However, one end portion of the engagement lever 24A is linked to the trigger member 21A via a long hole-like engagement portion 41A of the horizontal flange portion 23 of the trigger member 21A and a linkage pin 45 penetrating the engagement portion 41. The configuration is slightly different.

  As shown in the second and third embodiments, the intended purpose of the present invention can be achieved even if the movable locking means 24A is provided so as to be linked indirectly rather than directly to the trigger member 21A. Therefore, it can be said that such a design change example is substantially the same as the present invention. Since the locking means of the second and third embodiments are also indirectly controlled by the control springs 25 and 26 in the lock box as in the first embodiment, the second object of the present invention is achieved. can do.

  Furthermore, in the first embodiment, the locking means 24 is a movable type that slides in the horizontal direction, but 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 shown, the horizontal hook portion 23 is formed in a screwed state, screwed into the horizontal screw portion 23, and the engagement capturing piece 31 (31A) is placed at an appropriate position on the outer periphery. A rotating plate type locking means 24 having an engaging projection for engaging and disengaging with the engaging portion on the back side 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 engaged with and disengaged from the engagement portion on the back side of the engagement capturing piece 31 (31A) at an appropriate position on the outer periphery. A pinion member having a protrusion may be pivotally supported as appropriate.

  In addition, the relationship between the horizontal flange portion 23 and the locking means 24 is changed in design of the shape of the engagement portion on the back side of the engagement capturing piece 31, the arm portion 15 b of the engagement member 15, or also the locking means 24. It is theoretically possible to use a fixed type.

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

FIG. 1 to FIG. 10 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 seen from the free end part side of the free door. Explanatory drawing of the main members (a trigger member, a locking means, an engagement capture piece, an engagement action member, a latch). Explanatory drawing of the principal part (a trigger member, a locking means, a control spring). 6A is an explanatory diagram when the door is opened, and FIG. 6B is an explanatory diagram when the door is closed. The front view of a receptacle. The left view on the basis of FIG. FIG. 9 is a cross-sectional view taken along line 9-9 in FIG. 7. Schematic explanatory drawing which shows the sliding contact relationship of the engaging part of a receiver, and a latch. FIG. 11A is an explanatory diagram when the door is opened, and FIG. 11B is an explanatory diagram when the door is closed. It is explanatory drawing of 3rd Example which changed the design of the principal part of 1st Example, (a) of FIG. 12 is explanatory drawing at the time of door opening, (b) of FIG. 12 is explanatory drawing at the time of door closing.

Explanation of symbols

X ... Latch lock, Y ... Door, Z ... Door frame, 1 ... Lock body, 2 ... Lock box, 3 ... Front plate, 4 ... Latch guide, 5A, 5B ... Latch, 6 ... Latch locking surface, 7 ... Inclined surface of the latch, 8 ... Latch front end, 9 ... Latch rear end, 11 ... Latch spring, 12 ... Spring end support piece, 14 ... Drive member, 15 ... engaging member, 15a ... Vertical receiving portion, 15b ... upper and lower arm parts, 16 ... return spring, 17 ... engagement claw, 18 ... guide projection, 19 ... engagement part, 21 and 21A ... trigger member, 22 ... trigger head, 23 ... horizontal flange part, 24 and 24A ... Locking means for operation member, 24a ... outer peripheral surface, 25 ... weak control spring, 26 ... strong control spring, 27 ... roller, 31, 31A ... engagement capture piece (engagement lock piece), 32 ... horizontal axis, 33 ... attached Spring, 41, 41A ... engaging portion, 42 ... horizontal axis, 43 ... dorsal engaging portion, 5 ...... Receiver, 50a ... Receiver surface, 51 ... engagement part, 51a ... engagement part (inclined surface), 51b ... engagement part (flat surface), 52 ... entry hole, 52a ... vertical reception surface, 53 ... bottom wall, 60 ... operating member.

Claims (5)

The upper and lower non-inverted latches, which are disposed on the door frame side latch holder and the lock box on the free door side so that the inclined surface and the locking surface are opposite to each other, are operated by the operating force of the operating member. In a latch lock comprising an actuating drive member and a lock body that moves backward in the lock box through an engaging member that cooperates with the drive member, a trigger member can be moved forward and backward in the lock box. The trigger member is provided with a locking means for an operating member controlled by a control spring in the lock box at a horizontal hook portion, and the locking means is a position for restraining the engaging action member when the door is opened. A latch lock characterized by moving to a position where the engagement member is unconstrained when the door is closed. 2. The locking means 24 according to claim 1, wherein the locking means 24 is in a state in which the engaging action member is restrained or unconstrained via an engagement capturing piece rotatably disposed between the engaging action member and the locking means 24. Latch lock, characterized by 2. The latch lock according to claim 1, wherein the control spring for the trigger member is of two types, a spring having a weak spring force and a spring having a weak spring force. The upper and lower non-inverted latches, which are disposed on the door frame side latch holder and the lock box on the free door side so that the inclined surface and the locking surface are opposite to each other, are operated by the operating force of the operating member. In a latch lock comprising an actuating drive member and a lock body that moves backward in the lock box through an engaging member that cooperates with the drive member, a trigger member can be moved forward and backward in the lock box. The trigger member is provided with a locking means for an operation member that is pivotally supported by the lock box so as to be linked to the horizontal saddle portion, and is controlled by a control spring in the lock box. In this case, the latch lock is moved to a position for restraining the engaging action member, and is moved to a position for releasing the restraint of the engaging action member when the door is closed. 5. The latch lock according to claim 4, wherein the locking means is an engaging lever pivotally supported via a horizontal axis.

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