JP2005146840A - Latch lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a latch lock having a simple structure and capable of being securely locked in a door closing condition and being opened in the directions of both sides from the door closing condition. <P>SOLUTION: This latch lock has a latch head 14 provided in the vicinity of an open end of a swinging door 12 and capable of protruding and being pulled in by an operation lever and a latch receiving member 18 provided in a member such as a fixed door 16 adjacent to the door 12 or the like at a position where the latch head 14 oppose while the door 12 is closed. The latch receiving member 18 is provided with a latch head storage part 22 in which three directions including the direction opposing to the door 12 and directions of swing of the door 12 are opened and a pair of lock members 28 which are attached to an end part in the direction of swing of the door 12 and between which the latch head 14 enters in the latch head storage part 22. The lock members 28 are pressed by the latch head 14 advancing into the latch head storage part 22 to let the door 12 pass when closing the door 12 and stops the latch head 14 and locks the door 12 when opening the door 12. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a latch lock that is attached to a swinging end side of a swinging door and a facing portion thereof and holds the door on a pillar, a fixed door, or the like.

  Conventionally, gates and doors have one side edge in the vertical direction attached to a pillar or wall via a hinge, and the other side edge, that is, an open end, is provided with a latch head for a latch lock. The latch lock is provided with a latch case attached to the door and a latch head protruding sideways from the opening of the latch case. The latch head has a rectangular shape with one long side surface, and a slope is formed in a shape in which one corner parallel to the longitudinal direction of the rectangle is cut obliquely. The latch head is urged by a coil spring or the like in the protruding direction, and protrudes and retracts against the urging force by a lever provided in the latch case.

  In addition, a latch receiving member is provided at a position facing the latch head of the pillar or fixed door facing the open end of the door, and the latch head accommodating portion is a recess into which the latch head is inserted. Is formed.

Next, the operation of this latch lock will be described. When closing the door, the inclined surface of the latch head comes into contact with the latch receiving member, and the latch head is pushed into the door. When the latch head coincides with the latch head accommodating portion, it is urged by the coil spring, protrudes, is inserted into the recess, and is locked. On the other hand, when the door is opened, the latch head is moved backward by the lever to the inside of the door to swing the door in one direction.
JP 2001-227269 A

  Generally, the latch lock is made to open and close only in one direction with respect to the pillar and the fixed door, and does not open on the opposite side. However, for example, when a passerby who is difficult to walk uses a wheelchair or a walker, when the door opens only to the passer's side, the passer himself / herself will move with the swinging of the door if the door gets close enough to reach the lever. I had to retreat and it was difficult to pass. For this reason, a structure in which the door opens to both sides is desired.

  In order to solve this problem, there is a latch lock that opens in both directions, but the structure is complicated, and in the case of a double door with a simple structure, the door is not locked.

  The present invention has been made in view of the above-mentioned problems of the prior art, and has a simple structure, a latch that is securely locked when the door is closed, and can be opened in both directions with respect to the closed state of the door. The purpose is to provide a lock.

  The present invention is provided at a position where a latch head provided near an open end of a swinging door and projectable and retractable by an operating lever, and a latch head of a member adjacent to the door in a state where the door is closed are opposed to each other. A latch receiving member provided in the latch receiving member, the latch head accommodating portion being open in three directions, the direction facing the door and the swinging direction of the door, and the swing of the door in the latch head accommodating portion. A pair of locking members are provided that are attached to end portions in the direction and between which the latch head is interposed, and when the door is closed, the locking member is pushed and moved by the latch head entering the latch head housing portion. When the door is allowed to pass through and the door is about to open, the latch head that stops the latch head moving in the direction of exiting from the latch head housing portion and locks the door is provided.

  The lock member has a substantially L-shaped cross section parallel to the swinging direction of the door, and one straight portion of the L shape intersects the swinging direction of the door and swings in the middle. A moving shaft member is mounted, and a locking portion is provided which is located on the side of the shaft member and contacts the locked portion of the locking member to prevent the locking member from swinging outward; The other straight line portion of the letter shape is a holding portion that is positioned substantially parallel to the swinging direction of the door, protrudes toward the side surface of the latch head, and stops moving outside the latch head.

  The latch head has a pair of side surfaces facing in the swinging direction of the door, and is formed in an inclined surface that becomes narrower as it approaches the tip, and the side surface on the latch head side of the holding portion of the lock member It is inclined along the pair of side surfaces of the latch head.

  Further, a recess formed in a part of the latch head, a first contact portion provided on the inner peripheral surface of the recess, and a second contact portion provided on the inner peripheral surface of the recess are provided. ing. A rotary cam is provided in the recess, and the rotary cam is located in a backward passage to the door of the latch head of the first contact portion and closes the backward passage of the latch head. And a retracting operation projection that is located in a protruding side passage of the latch head of the second contact portion and pushes the second contact portion to retract the latch head. A first elastic body that urges the rotating cam member to a position where the retraction preventing protrusion is opposed to the first abutting portion in a retreat side passage of the latch head; and A handle that is manually rotated to oppose the urging force and a second elastic body that urges the latch head in the protruding direction are provided. When the handle is operated to move the retraction preventing protrusion of the rotating cam away from the first abutting part and move from the retreating passage of the latch head, the retreating operation protrusion of the rotating cam is moved to the second abutting part. The latch head is brought into contact with the portion and retracted to the door against the urging force of the second elastic body.

  The latch head is urged against and in contact with the pair of lock members by the second elastic body. In the pair of lock members, the interval between the side surfaces facing each other is different in the vertical direction.

  The latch lock of the present invention has a simple structure and can open and close the door in both directions with respect to the position where the door is closed. When closing the door, just close the door closing member, one of the pair of locking members can be easily rotated to allow the latch head to pass, and when the door closes, the locking member returns to its original position, The latch head can be reliably locked. As a result, even if a passerby who is difficult to walk can come from any direction with a wheelchair or walker, the door can be opened easily in the direction of travel, opposite to his / her position, and the door can be locked. Is also possible.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 and 2 show a first embodiment of the present invention. A latch lock 10 according to this embodiment is provided with a latch head 14 which can be projected and retracted at a substantially vertical open end 12a of a door 12. FIG. ing. A pair of side surfaces 14 a and 14 b of the latch head 14 facing the swinging direction of the door 12 are inclined surfaces that approach each other as they approach the tip of the latch head 14, and the inclined surfaces are curved so as to be recessed toward the inside of the latch bolt 14. ing. The latch head 14 is biased in the protruding direction by a coil spring or the like (not shown). Further, the latch head 14 is projected and retracted in conjunction with a lever (not shown) provided on the door 12.

  A space is formed in a portion facing the latch head 14 in the fixed door 16 locked in a closed state of the door 12, and a latch receiving member 18 is fixed inside the space with a screw 20. A latch head housing portion 22 that is a space opened in three directions excluding the fixed door 16 side, that is, the direction facing the door 12 and the swinging direction of the door 12, is provided at the central portion of the latch receiving member 18 in the vertical direction. Is provided. Bearing holes 24 are formed in the upper surface 22a and the lower surface 22b of the latch head accommodating portion 22 near the end in the thickness direction of the fixed door 16, respectively. On the inner side surface 22c on the fixed door 16 side of the latch head accommodating portion 22, a plate-like locking projection 26 is a locking portion that protrudes to a position closer to the inner side surface 22c on the center side than each bearing hole 24. It is provided at a right angle to the inner side surface 22c.

  A pair of locking members 28 are attached to the latch head accommodating portion 22 of the latch receiving member 18 along the swinging direction of the door 12. The lock member 28 has a substantially L-shaped cross section parallel to the swinging direction of the door 12, and one linear portion is locked to abut against the outer surface 26 a of the locking protrusion 26 of the latch receiving member 18. And a through hole 32 provided at the base end portion of the locking plate 30 and communicating with the bearing hole 24 of the latch receiving member 18. The other straight portion is a holding portion 34 that extends substantially at a right angle to the locking plate 30. The front end of the holding portion 34 reaches the vicinity of the center of the latch head housing portion 22, and the side surface 34 a of the holding portion 34 is curved so as to bulge outward along the side surfaces 14 a and 14 b of the latch head 14.

  The pair of lock members 28 are provided so that their cross-sectional shapes parallel to the swinging direction of the door 12 are symmetrical to each other. A shaft member 36 is inserted into each through hole 32, and the shaft member 36 is connected to a support pin (not shown) projectingly contacted with a bearing hole 24 provided on the upper surface 22 a and the lower surface 22 b of the latch head housing 22. Is held. As a result, the lock member 28 can rotate with respect to the latch receiving member 18. Further, a helical spring 38 surrounding the shaft member 36 is attached, and the ends of the helical spring 38 are respectively the inner side surface of the latch head accommodating portion 22 of the holding portion 34 of the lock member 28 and the locking projection 26 of the latch receiving member 18. The latch head accommodating portion 22 is in contact with the inner side surface. The helical spring 38 is fitted in a groove 39 provided at the center of the lock member 28. As a result, the locking member 28 is urged by the locking plate 30 of the locking member 28 abutting against the locking projection 26 outer surface 26 a of the latch receiving member 18.

  Next, the operation and action of the latch lock 10 of this embodiment will be described. When opening the door 12, the lever (not shown) is operated to retract the latch head 14 from the latch head accommodating portion 22 of the latch receiving member 18 and release the engagement with the fixed door 16. In this state, the door 12 can be opened in both directions with respect to the fixed door 16.

  When closing the door 12, the door 12 is closed from either side toward the fixed door 16 as shown in FIG. At this time, the locking plate 30 of the locking member 28 contacts the locking projection 26 outer surface 26 a of the latch receiving member 18, and the holding portion 34 of the locking member 28 is on the entry locus of the latch head 14. Further, when the door 12 is closed, one of the side surfaces 14a and 14b of the latch head 14 comes into contact with the outer surface of the holding portion 34 of the lock member 28 as shown in FIG. 2B, and the helical spring 38 is elastically deformed. The locking member 28 is rotated in the direction in which the locking plate 30 and the locking projection 26 outer surface 26a are separated. When the locking member 28 rotates to an angle of about 90 degrees between the locking plate 30 and the locking projection 26 outer surface 26a, the holding portion 34 of the locking member 28 moves from the position where the latch head 14 enters to the latch head housing portion. It will be in the passable state which moves to 22 side inner surface 22c vicinity. When the latch head 14 enters approximately the center of the latch head accommodating portion 22 and is separated from the lock member 28, the lock spring 28 is returned to the original state of the lock member 28 by the helical spring 38 as shown in FIG. At this time, the distal end of the lock member 28 is positioned slightly perpendicularly to the side surfaces 14 a and 14 b of the latch head 24 to prevent the latch head 14 from coming out of the latch head accommodating portion 22.

  According to the latch lock 10 of this embodiment, the door 12 can be opened and closed in any direction on both sides of the fixed door 16 with a simple structure. When closing the door 12, just close to the fixed door 16, one of the pair of lock members 28 can be easily rotated to pass, and after the door 12 is closed, the lock member 28 returns to its original position, It can be securely locked. Thereby, even if a passerby who is difficult to walk comes from any direction with a wheelchair or a walker, the door 12 can be opened in the traveling direction opposite to his / her position and easily passed. Moreover, if the door 12 provided with the latch lock 10 of this embodiment is used in a barrier-free passage where there is no step on the floor surface below it, it becomes easier for the handicapped to use and the added value is increased. When the door 12 having a thin member such as a lever is used, it is safer without being caught by a passerby or a wheelchair.

  The latch lock 10 of the present invention can be used for locking the door 12 and a frame, a wall, or the like in addition to being used for locking the door 12 and the fixed door 16 as in the above embodiment. The position to attach the latch lock 10 can also be freely selected. For example, as shown in FIG. 3, a frame 40 is provided in a building, and a pair of double doors 42 are provided in the frame 40. One side edge 42 a of the door 42 is attached to the vertical member of the frame 40 via a hinge 44. A latch head 46 is provided on the upper end portion 42 b of the door 42 so as to protrude upward at a position near the open end portion 42 c of the door 42. The latch head 46 can be projected and retracted by the lever 45 through a mechanism (not shown). A latch receiving member 48 is provided on the lateral member of the frame 40 at a position facing the latch head 46. The latch receiving member 48 is provided with a pair of locking members along the swinging direction of the door 42, and has the same structure as the first embodiment.

  Further, in the latch lock of the present invention, the shape of each member can be appropriately changed. For example, as shown in a latch lock 49 shown in FIG. 4, the latch lock member 50 has an upper surface 52a and a lower surface 52b of the latch head accommodating portion 52. A locking step portion 54 that is a locking portion provided at an outer end portion in the thickness direction of the fixed door 16 may be formed. The locking step 54 is convex from the upper surface 52a and the lower surface 52b. Near the middle of the end of the locking step 54, bearing holes 56 are formed.

  On the other hand, a pair of locking members 58 are attached to the latch head accommodating portion 52. The lock member 58 is formed in an L shape in cross-section parallel to the swinging direction of the door 12, and one linear portion is a mounting plate 60 that is overlapped on the door 12 side from the bearing hole 56 of the locking step portion 54. The other straight portion is a holding portion 64 that extends substantially at right angles to the mounting plate 60. The mounting plate 60 is provided with a through hole 62 communicating with the bearing hole 56 of the latch receiving member 50. The holding portion 64 has a locked step portion 66 that is a locked portion in a portion that does not overlap the locking step portion 54 when the mounting plate 60 is overlaid on the locking step portion 54. Is provided. The locked stepped portion 66 is formed higher than the holding portion 64 and abuts on the locking stepped portion 54 adjacently. Further, the locking member 58 is urged by a helical spring (not shown) in a direction in which the locked stepped portion 66 abuts adjacent to the locking stepped portion 54 of the latch receiving member 50.

  According to the latch lock 49, the same operation as the latch lock 10 of the above-described embodiment is performed, and the same effect is obtained. The latch lock 49 is compact because the lock member 58 does not protrude to the outside of the latch receiving member 50 when the lock member 58 is rotated when the latch head 14 enters the latch receiving member 50.

  Next, a second embodiment of the present invention will be described with reference to FIGS. Here, the same components as those in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted. The latch lock 68 of this embodiment is provided with a main body 70 which is a box attached to the door 12 side. The main body 70 includes a side surface portion 72 positioned substantially perpendicular to the rotation direction of the door 12 when attached, and a wall portion 74 connected to three sides of the side surface portion 72 and positioned perpendicular to the side surface portion 72. 76, 78 are provided.

  A pair of attachment portions 80 parallel to the wall portion 76 are provided at the end portions of the wall portions 74 and 78 opposite to the wall portion 76. The attachment portion 80 is provided so as to protrude in the vertical direction of the main body 70. Near the center of the mounting portion 80, a latch head insertion port 82 through which a latch head 100 described later is inserted is formed. Opening edge portions of the wall portions 74, 76, 78 on the side opposite to the side surface portion 72 are provided with step portions 83 that go round the inside of the main body 70 and are one step lower.

  Near the center of the wall portion 78 located on the upper surface of the main body 70 in the mounted state, a first convex portion 84 that protrudes inward of the main body 70 and continues in a direction perpendicular to the side surface portion 72 is provided. 84 is formed flush with the stepped portion 83, and a screw hole 86 is formed at the center thereof. Screw holes 88 are also formed at the corners of the wall 76 adjacent to the wall 78. Near the center of the wall portion 74 located on the lower surface of the main body 70 in the mounted state, a second convex portion 90 that protrudes inward of the main body 70 and continues in a direction perpendicular to the side surface portion 72 is provided. 90 is formed lower than the step portion 83. Near the corners of the wall 74 and the mounting plate 80, a third convex portion 92 is provided. The third convex portion 92 is formed flush with the step portion 83, and a screw hole 94 is formed at the center thereof.

  A shallow cylindrical rotating cam member in which a rotating cam member 114, which will be described later, is rotatably fitted at a position closer to the wall 74 of the side surface portion 72 and closer to the center of the door 12 than the second convex portion 90 is. A concave portion 115 is formed. A cylindrical first shaft member 96 is formed at a right angle with respect to the side surface portion 72 on the side of the wall portion 76 with respect to the concave portion 115 for the rotating cam member, and further on the side of the wall portion 76 with respect to the second shaft portion 96. A shaft member 98 is provided. A screw hole 99 is formed in the center of the second shaft member 98. Further, a shaft member concave portion (not shown) into which the shaft member 97 is fitted is formed at a position near the wall portion 78 of the side surface portion 72 at a position closer to the center of the door 12 than the first convex portion 84. . The rectangular opening facing the side surface 72 is provided with a plate-like lid (not shown) in contact with the step portion 83, and the lid is provided with a through hole communicating with the screw holes 86, 88, 94, 99. And each is fixed with a screw.

  A latch head 100 is provided inside the main body 70. In the latch head 100, inclined surfaces 102 are formed on a pair of side surfaces 100 a and 100 b parallel to the side surface portion 72 so as to approach each other as the tip 100 c of the latch head 100 is approached. A first concave portion 104 that is movably fitted to the first convex portion 84 of the wall portion 78 is formed on a surface facing the wall portion 78 of the latch head 100 in parallel.

  A second recess 106 is formed on a surface parallel to the wall 74 of the latch head 100 so that a rotary cam member 114 described later can be rotatably fitted thereto. The second concave portion 106 is formed in a substantially L shape including a portion recessed in parallel to the wall portion 74 and a portion recessed in parallel to the wall portion 76. A first contact portion 108 that protrudes between the second convex portion 90 and the third convex portion 92 is provided on the inner peripheral surface of the second concave portion 106. The first abutting portion 108 abuts against the third convex portion 92 of the wall portion 74 when the latch head 100 protrudes to the outside of the door 12, and regulates the protruding amount of the latch head 100. When a force is applied in the retreating direction, it comes into contact with a rotating cam member 114 described later to prevent the retreating. A portion of the inner peripheral surface of the second recess 106 on the wall 72 side becomes a second contact portion 109 parallel to the wall 72. Further, the second concave portion 106 does not penetrate the latch head 100, and a plate portion 110 parallel to the side surface portion 72 is provided on the side surface portion 72 side inside the second concave portion 106. The plate portion 110 is formed with a guide hole 112 into which a shaft member 97 attached to the side surface portion 72 is movably fitted. The guide hole 112 is formed long in the moving direction of the latch head 100.

  A rotating cam member 114 is provided in the second recess 106 on the side surface portion 72 side. The rotating cam member 114 has a pair of side surfaces parallel to the side surface portion 72, and is provided with a columnar shaft member 116 that is inserted into the rotating cam member recess 115 formed in the side surface portion 72. The retraction preventing protrusion 118 extending in the protrusion direction of the latch head 100 and the retraction operation protrusion 120 extending to the wall 78 side of the main body 70 at right angles to the protrusion direction of the latch head 100. It is formed in a substantially L shape. A cylindrical shaft member 116 protrudes also on the lid side (not shown) of the rotating cam member 114 opposite to the side surface portion 72, and a rectangular columnar through hole 122 is formed through the center of the shaft member 116. A rectangular columnar shaft member 124 is inserted into the through-hole 122, and the shaft member 124 protrudes to the outside of the main body 70 and the lid, and a rod-shaped handle 126 is attached.

  A first helical spring 128 that is a biasing means is attached to the first shaft member 96 of the side surface portion 72. One end of the first helical spring 128 is in contact with the wall 74, and the other end is in contact with the retraction operation protrusion 120 of the rotating cam member 114, and the rotating cam member 114 is rotated counterclockwise in the drawing. Is energized. At this time, the retreat prevention protrusion 118 of the rotating cam member 114 is positioned in contact with the second protrusion 90 of the wall 74. A second helical spring 130 is attached to the second shaft member 98. One end of the second helical spring 130 abuts against the wall 76 and the other end abuts against the end 100d of the latch head 100 opposite to the tip 100c, and urges the latch head 100 leftward in the drawing. ing. At this time, the first contact portion 108 of the latch head 100 is positioned by contacting the third convex portion 92 of the wall portion 74.

  A decorative cover 132 is attached to the outer surface of the attachment plate 80 of the main body 70 via a screw, and a through hole 134 that communicates with the latch head insertion opening 82 is formed in the decorative cover 132.

  Further, a latch receiving member 136 is fixed to the fixed door 16 that is locked in a closed state by a screw at a portion facing the latch head 100. The latch receiving member 136 is provided with a latch head accommodating portion 138, and a pair of lock members 140 are attached to the latch head accommodating portion 138 along the swinging direction of the door 12. The lock member 140 has a substantially bowl shape in cross section parallel to the swinging direction of the door 12, and one end portion 140a is formed by an arc having a large diameter, and the width becomes narrower as the distance from the end portion 140a increases. The opposite end 140b is formed by an arc having a small diameter. A through hole 140c is provided through the center of the circle of the end portion 140a. The locking member 140 is attached so that the longitudinal direction is positioned at a right angle to the swinging direction of the door 12 so that the end portion 140a is located away from the door 12 and the end portion 140b is located near the door 12. ing. A shaft member 142 is inserted through the latch receiving member 136 into the through hole 140c, and the lock member 140 is fixed to the latch receiving member 136.

  Locking protrusions (not shown) that protrude upward or downward are provided on the upper end surface and the lower end surface of the lock member 140, respectively. The pair of lock members 140 are provided symmetrically, and the inclined surfaces 144 facing each other are formed in directions that are closer to each other on the end 140a side and away from each other as they approach the end 140b.

  The pair of lock members 140 are not parallel to each other in the vertical direction, but are attached in a V-shape approaching each other as they approach the lower side. Similarly, the inclined surface 102 of the latch head 100 is preferably formed to have a V-shaped inclination parallel to the inclination of the lock member 140. Thereby, the adjustment to eliminate the gap between the pair of lock members 140 and the latch head 100 is easy and accurate. Note that the inclination may be set appropriately as the V shape may be reversed.

  In addition, a helical spring (not shown) is attached to the lock member 140, and the pair of lock members 140 are biased in a direction parallel to the swinging direction of the door 12 and away from each other toward the outside of the latch receiving portion 136. Has been. Then, a locking projection (not shown) of the lock member 140 abuts against a part of the latch receiving member 136 and is guided so as not to open further outward.

  Next, the operation and action of the latch lock 68 of this embodiment will be described. First, when the door 12 is closed, as shown in FIG. 7A, the door 12 is closed from either side toward the fixed door 16. At this time, the end 140b of the lock member 140 is at the intrusion position of the latch head 100. Further, when the door 12 is closed, as shown in FIG. 7B, the inclined surface 102 of the latch head 100 comes into contact with the outer surface of the lock member 140, and the latch head 100 resists the second spring spring 130. Then, the helical spring (not shown) of the lock member 140 is elastically deformed and the end portion 140b of the lock member 140 rotates in the direction toward the inside of the latch receiving member 136. As a result, the latch head 100 is allowed to pass.

  When the latch head 100 passes and enters almost the center of the latch head accommodating portion 138, the lock member 140 is returned to the original position by the helical spring as shown in FIG. It protrudes by the spring 130 and becomes locked. At this time, the inclined surface 102 and the side surface of the latch head 100 are urged by and contacted with the inclined surface 144 of the lock member 140 by the second second spring spring 130, and there is no rattling. Further, the first abutting portion 108 of the latch head 100 faces the retreat preventing projection 118 of the rotating cam member 114, and retreat to a position where the door 12 can be opened is suppressed and locked.

  When the door 12 is opened, the handle 126 is opened from the closed state shown in FIG. 8A, and the rotating cam member 114 is rotated by elastically deforming the first spring spring 128 as shown in FIG. Of the latch head 100 is separated from the first abutting portion 108 of the latch head 100 and enters the second recess 106, so that the first abutting portion 108 and the receding preventing projection 118 are opposed to each other. It becomes possible. In this state, when the door 12 is moved to one of the lock members 140 and further force is applied, the inclined surface 102 of the latch head 100 comes into contact with the inclined surface 144 of the lock member 140 as shown in FIG. The latch head 100 elastically deforms the second helical spring 130, retracts into the main body 70, gets over the end 140b of the lock member 140, and goes out of the latch receiving member 136 as shown in FIG. 8D. . Then, due to the elastic force of the second helical spring 130, the latch head 100 returns to the original protruding state as shown in FIG. 8 (e).

  According to the latch lock 68 of this embodiment, the door 12 can be reliably locked to the fixed door 16 without rattling. When the door 12 is opened, the lock 126 is simply released by depressing the handle 126. Thereafter, the latch head 100 is automatically sunk by the movement of the door 12, and the door 12 can be easily moved in either direction with a weak force. Can also be opened. Since the pair of lock members 140 are not parallel to each other but are attached in a V-shape inclined in a direction approaching each other, the lock member 140 is changed by changing the relative vertical position of the lock member 140 and the latch head 100. And the preparation for eliminating the gap between the latch head 100 can be easily performed.

  In addition, the latch lock of this invention is not limited to the said embodiment, The shape of a locking member can be set suitably, and shapes other than L shape may be sufficient. Further, the lock members can be arranged in a different manner in addition to being provided in a pair so as to face each other. Thereby, the thickness of the latch lock can be further reduced. Furthermore, a plurality of sets of latch heads and lock members may be provided and can be selected as appropriate. Furthermore, the latch lock of the present invention can be used for indoor and outdoor doors other than the gate, and the use thereof is not limited.

It is a cross-sectional view of the latch lock of the first embodiment of the present invention. It is a perspective view which shows the process of closing the door of the latch lock of 1st embodiment of this invention. It is a front view which shows the modification of the latch lock of 1st embodiment of this invention. It is a cross-sectional view which shows the modification of the latch lock of 1st embodiment of this invention. It is a longitudinal cross-sectional view of the latch lock of 2nd embodiment of this invention. It is a longitudinal cross-sectional view which shows the other state of the latch lock of 2nd embodiment of this invention. It is a cross-sectional view which shows the process of closing the door of the latch lock of 2nd embodiment of this invention. It is a cross-sectional view which shows the process of opening the door of the latch lock of 2nd embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Latch lock 12 Door 14 Latch head 16 Fixed door 18 Latch receiving member 20 Screw 22 Latch head accommodating part 24 Bearing hole 26 Locking protrusion 28 Lock member 30 Locking plate 32 Through-hole 34 Holding part 36 Shaft member 38 Spiral spring

Claims (6)

  A latch head provided near the open end of the swinging door and protruding and retractable by an operating lever, and a latch receiving member provided at a position where the latch head of a member adjacent to the door faces the door when the door is closed. A latch head housing portion provided on the latch receiving member and opened in three directions of a direction facing the door and a swinging direction of the door, and an end portion of the door in the swinging direction of the latch head housing portion A pair of locking members that are attached to the latch head and between which the latch head is interposed, and when the door is closed, the lock member is pushed and moved by the latch head entering the latch head housing portion and passes through the door A latch lock that locks the door by stopping the latch head that moves in the direction of exiting the latch head housing when the door is about to open.   The lock member has a substantially L-shaped cross section parallel to the swinging direction of the door, and one straight portion of the L shape intersects the swinging direction of the door and swings in the middle. A shaft member is attached, and further provided with a locking portion that is located on the side of the shaft member and that abuts against the locked portion of the lock member and prevents the lock member from swinging outward. The other straight line portion is positioned substantially parallel to the swinging direction of the door, and is a holding portion that protrudes toward the side surface of the latch head and stops the movement of the latch head to the outside. The latch lock according to 1.   The latch head is formed with an inclined surface in which a pair of side surfaces facing the swinging direction of the door becomes narrower as it approaches the tip, and the side surface of the holding portion of the lock member on the latch head side is the latch head The latch lock according to claim 1, wherein the latch lock is inclined along a pair of side surfaces.   A recess formed in a part of the latch head; a first contact portion provided on an inner peripheral surface of the recess; a second contact portion provided on an inner peripheral surface of the recess; A rotation cam provided on the rotation cam, and a retraction preventing protrusion that is provided on the rotation cam and is located in a retraction path to the door of the latch head of the first abutting portion and closes a retraction side path of the latch head, A retraction operation projection provided on the rotating cam and positioned in a protruding side passage of the latch head of the second abutting portion to retreat the latch head by pushing the second abutting portion; A first elastic body that urges the prevention protrusion to a position facing the first abutting portion in the backward passage of the latch head, and a handle that rotates the rotating cam against the urging force of the first elastic body. And a second elastic body for urging the latch head in the protruding direction When the handle is operated to move the retraction preventing protrusion of the rotating cam away from the first abutting portion and move from the retreating passage of the latch head, the retreating operating protrusion of the rotating cam is 3. The latch lock according to claim 1, wherein the latch head is brought into contact with a second contact portion and retracts the latch head into the door against an urging force of the second elastic body.   5. The latch lock according to claim 1, wherein the latch head is urged toward and contacts the pair of lock members by the second elastic body. 5. The latch lock according to claim 1, wherein the pair of lock members are inclined so that the interval between the side surfaces facing each other is different in the vertical direction.

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