JP2009215772A - Latch lock - Google Patents

Abstract

A latch lock that can be reliably locked to a fixed side when a door is closed with a simple structure.
A pair of latch members (32, 124), latch member return springs (40, 134) for urging the pair of latch members (32, 124) in a protruding direction, and a pair of latch members (32, 124) are latch return springs (40, 134). Against this, it has a rotating cam 70 that is retracted by operating the handle. A rotating block 52 that stops rotating by abutting against the rotating cam 70 and a damper 68 that serves as a resistance to movement between the position where the rotating block 52 contacts the rotating cam 70 and the retracted position are provided. A trigger 46 is mounted on the opposite side of the rotary block 52 from the damper 68 and protrudes from the case body 12 in parallel with the latch members 32 and 124. A trigger return spring 61 that biases the trigger 46 away from the rotary block 52 with a force stronger than the return spring of the damper 68 is provided.
[Selection] Figure 1

Description

  The present invention relates to a latch lock that is attached to an open end of a swinging door and holds the door on a pillar or a fixed door.

Conventionally, there is a latch lock that is attached to a swing door and can open the swing door in both directions with respect to a fixed side of a frame or the like. The latch lock disclosed in Patent Document 1 includes a latch receiving member attached to the fixed side, and at least two latch members that can be projected and retracted and attached to the swing door side. A latch head accommodating portion is provided corresponding to each of the latch members. One latch head accommodating portion is provided with a latch engaging portion on the left side in the swinging direction of the door, and the other latch head accommodating portion is provided with a latch engaging portion on the right side in the swinging direction of the door. The shape of the latch head is formed in a substantially right triangle composed of a locking surface portion that contacts and locks with the latch locking portion and an inclined surface portion that contacts and sinks into the latch locking portion. The latch heads of the pair of latch members are formed symmetrically with the locking surface portions positioned on the locking portion side.
JP 2006-233462 A

  In the case of the above prior art, when the swing door is closed to the fixed side, if the handle is operated and the pair of latch heads are retracted, the door may pass through the fixed side and open to the opposite side. As a result, the door may have been opened with the intention of closing, or the door may have to be returned and closed again. Closing with the latch head protruding without operating the handle, the latch head is pushed back by the latch locking part when the door approaches the fixed side, and protrudes when it matches the latch head receiving part, Although it is securely locked, if the handle is operated without knowing it, the door may pass through the fixed side.

  The present invention has been made in view of the problems of the background art described above, and an object of the present invention is to provide a latch lock that can be reliably locked to the fixed side when the door is closed with a simple structure.

  The present invention includes a case main body provided near the open end of the swinging door, a pair of latch members protruding from the case main body, a latch member return spring for biasing the pair of latch members in the protruding direction, A rotating cam that retracts the pair of latch members against the latch return spring; a handle member connected to the rotating cam; a rotating block that stops rotation by contacting the rotating cam; and A damper that provides resistance to movement between a position that contacts the rotating cam and a retracted position; a trigger that is attached to the opposite side of the damper of the rotating block and protrudes from the case body in parallel with the latch member; There is provided a trigger return spring that urges the trigger in a direction away from the rotary block with a force stronger than the return spring of the damper, and the open end of the door The members facing each other are provided with a latch member accommodating portion which is a recess for accommodating the pair of latch members, and a trigger abutting protrusion with which the trigger abuts in a state of retreating against the trigger return spring. It is a lock.

  Further, the latch member has a contact surface facing substantially perpendicular to the swinging direction of the door, and an inclined surface which is continuous with the tip of the contact surface and becomes longer from the contact surface as the distance from the contact surface increases. The pair of latch members are provided such that the abutting surface and the inclined surface are opposite to the swinging direction of the door.

  The latch lock is in a state in which the trigger protrudes and the trigger return spring and the damper are not compressed when the door is open, and the rotating block comes into contact with the rotating cam to prevent the rotating cam from rotating. . Accordingly, the pair of latch members are maintained in a protruding state, and when the door is closed, the latch member is urged and protrudes, so that the latch member is inserted and closed.

  In the latch lock, immediately after the door is closed, the trigger comes into contact with the trigger contact protrusion, and first, a trigger return spring, which is a coil spring that is easily elastically deformed, is compressed and retracted. At this time, since the damper takes time to compress, the rotating block is kept in contact with the rotating cam to prevent the rotating cam from rotating. As a result, the handle cannot be operated, the latch is maintained in a protruding state, and is securely inserted into the latch member housing portion and closed.

  The latch lock is compressed after the door is closed and after a predetermined time has elapsed, the trigger is pushed by the restoring force of the trigger return spring. Accordingly, the rotating block moves and moves away from the rotating cam, and the rotating cam becomes rotatable. As a result, the handle can be operated, the latch head is retracted, the engagement with the latch member accommodating portion is released, and the door is opened.

  The trigger is a protrusion having a central portion located at the tip, and is formed in an isosceles triangle shape with inclined surfaces on both sides of the protrusion in the swinging direction of the door. The protrusion is a contact surface having a central portion located at the tip, and is formed in a trapezoidal shape with inclined surfaces on both sides of the contact surface in the swinging direction of the door. While the door is being closed, one of the pair of inclined surfaces of the trigger contacts one of the inclined surfaces of the trigger contact protrusion, and the trigger gradually retracts against the trigger return spring. To do. When the door is closed, the protrusion of the trigger comes into contact with the contact surface of the trigger contact protrusion, and the trigger is in a retracted state.

  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, and when closing the door, the door is inadvertently passed through the closing position and opened to the opposite side. It can prevent and close the door securely.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 8 show an embodiment of the present invention. A latch lock 10 of this embodiment is provided with a case main body 12 that is a box attached to a swinging door, and the case main body 12 has a rectangular shape. A side surface 14 and a wall portion 16 that is formed on three sides of the side surface portion 14 and continues substantially perpendicular to the side surface portion 14 are provided. On one side of the case body 12 where the wall portion 16 is not provided, an end surface portion 18 is provided that is attached flush with the end surface of the free end of the door. The end surface portion 18 is formed to be long in the vertical direction in a state attached to the door, and from the upper side along the side surface portion 14, the first latch member insertion port 20, the trigger insertion port 22, and the second latch member insertion. A mouth 24 is provided through the end face 18. The trigger insertion port 22 is provided at a position close to the lower second latch member insertion port 24. Note that the wall 16 has an upper portion intersecting the end surface portion 18 as a wall portion 16a, a lower portion as a wall portion 16b, and a portion parallel to the end surface portion 18 as a wall portion 16c. The end surface portion 18 protrudes slightly outside the wall portions 16a and 16b, and mounting through holes 19 are provided in the protruding portions.

  In addition, on the inner side surface of the end surface portion 18, there are two locations that are corner portions of the wall portions 16 a and 16 b intersecting the end surface portion 18, and one location between the first latch member insertion port 20 and the trigger insertion port 22. A thick-walled portion is formed, and screw holes 26 penetrating substantially perpendicularly to the side surface portion 14 are formed therein. In addition, a thick portion is formed at two locations of the wall portion 16c located in parallel to the end face portion 18, and screw holes 26 are provided there.

  A first holding projection 28 is formed on the inner side surface of the side surface portion 14 at a position near the center of the side surface portion 14 in the vicinity of the first latch member insertion port 20. A through hole 29 for attaching a handle attachment member (not shown) is formed in the first holding projection 28 so as to penetrate the side surface portion 14. A first bearing portion 30 is provided in a portion of the wall portion 16a that is closer to the wall portion 16c than the first holding projection 28 is. The first bearing portion 30 protrudes from the inner surface of the wall portion 16a at a substantially right angle. A cylindrical latch guide 31 is fitted and provided on the inner peripheral surface of the first latch member insertion port 20.

  The first latch member insertion opening 20 is provided with a first latch member 32 inside the latch guide 31 so as to protrude and retract. The first latch member 32 is provided with a bar-shaped main body 34 having a rectangular cross section, the main body 34 is set parallel to the wall portion 16a, and the end of the main body 34 on the first latch member insertion port 20 side is The latch head portion 36 is integrally formed. The latch head portion 36 has a constant cross-sectional shape in the vertical direction in the attached state, and the horizontal cross-sectional shape is such that a portion close to the side surface portion 14 is in contact with the side surface portion 14 as shown in FIG. 3A. A portion of the surface 36a opposite to the side surface portion 14 is an inclined surface 36b that continues to the tip of the contact surface 36a and intersects the contact surface 36a at an acute angle. The end of the body 34 opposite to the latch head 36 is bifurcated and extends toward the wall 16c, and a portion near the wall 16a is formed with a cylindrical shaft 38. A flange portion 39 is formed around the tip. The shaft portion 38 is slidably held by the first bearing portion 30 of the wall portion 16 a, and the flange portion 39 is located outside the first bearing portion 30. A first latch member return spring 40 that is a coil spring is wound around the shaft portion 38. The first latch member return spring 40 is appropriately compressed between the end portion of the main body 34 and the first bearing portion 30 to urge the first latch member 32 toward the outside of the first latch member insertion port 20. Yes. Since the flange portion 39 of the shaft portion 38 is locked to the first bearing portion 30, the first latch member 32 does not come out of the first latch member insertion port 20. The other branched portion of the first latch member 32 is formed such that a concave portion 42 into which a first interlocking cam 100 described later is inserted opens on the opposite side of the wall portion 16a, and the concave portion 42 is separated from the main body 34. The inner peripheral surface is a plate portion 44 with which the first interlocking cam 100 abuts.

  A trigger 46 is provided in the trigger insertion opening 22 so as to protrude and retract. The trigger 46 has a constant cross-sectional shape in the vertical direction in the attached state, and the cross-sectional shape in the horizontal direction is a protrusion 46a whose central portion is located at the tip, as shown in FIG. 3B, and the side surface of the protrusion 46a. An inclined surface 46c continuous to the 14th side and an inclined surface 46c continuous to the opposite side are provided to form an isosceles triangle. The trigger 46 is formed so that the vertical length is shorter than the latch head portion 36. A plate portion 48 projecting downward is provided at the end of the trigger 46 opposite to the projecting portion 46a. The plate portion 48 has a cylindrical recess 50 into which a trigger return spring 61, which will be described later, is fitted. Is provided.

  A rotating block 52 is attached in the vicinity of the trigger 46 on the side opposite to the protruding portion 46a. The rotating block 52 is provided with a holding plate 54 that is parallel to the protruding direction of the trigger 46. At the end of the holding plate 54 on the trigger 46 side, a locking projection 56 is provided that overlaps the outside of the plate portion 48 of the trigger 46, and a rectangular block portion 58 is provided at the opposite end of the holding plate 54. Is provided. The block portion 58 is provided with a shaft portion 60 that is fitted inside a trigger return spring 61 described later. A trigger return spring 61 is attached to a space surrounded by the plate portion 48 of the trigger 46, the holding plate 54 of the rotating block 52, and the block portion 58. One end portion of the trigger return spring 61 is inserted into the concave portion 50 of the plate portion 48 of the trigger 46, and the shaft portion 60 of the block portion 58 of the rotary block 52 is inserted into the other end portion between the trigger 46 and the block portion 58. The trigger 46 is appropriately compressed and biases the trigger 46 toward the outside of the trigger insertion port 22. Since the plate portion 48 is locked to the locking protrusion 56 of the rotary block 52, the trigger 46 does not come out of the trigger insertion port 22.

  On the upper surface of the block portion 58 on the side of the wall portion 16a of the case main body 12, an abutting uneven portion 62 that abuts on a rotating cam 70 described later and blocks rotation is formed. A rod mounting portion 64 having a small thickness is integrally provided at a portion close to the side surface portion 14 at an end portion of the block portion 58 opposite to the holding plate 54, that is, an end portion on the wall portion 16 c side. In addition, a second holding projection 53 symmetrical to the first holding projection 28 is formed on the inner side surface of the side portion 14 at a position near the center of the side portion 14 in the vicinity of the second latch member insertion port 24. A through hole 55 for attaching a handle attachment member (not shown) is formed in the second holding projection 53 so as to penetrate the side surface portion 14. The lower surface of the rotating block 52 on the wall 16b side is slidably abutted on and held by the second holding projection 53.

  A rod 66 is connected to the rod mounting portion 64 of the rotary block 52, and a damper 68 is provided at the tip of the rod 66. The damper 68 and the rod 66 are provided in parallel to the protruding direction of the trigger 46, and the end of the damper 68 opposite to the rod 66 is in contact with the wall 16c. The side surface portion 14 is provided with a holding portion 69 for fitting the damper 68, and the damper 68 is fitted and held in the holding portion 69.

  The side surface portion 14 is provided with a circular through hole (not shown) between the first latch member 32 and the rotating block 52 at a portion slightly closer to the end surface portion 18 than the center. 70 is provided. The rotating cam 70 is provided with a short columnar shaft portion 72 fitted into a circular through hole, and a rectangular column insertion hole 74 extends through the shaft portion 72 along the axial direction of the shaft portion 72. Is formed. A rectangular column-shaped rotation shaft of a handle (not shown) is inserted through the insertion hole 74.

  The rotation cam 70 is provided with a contact protrusion 76 that contacts the contact uneven portion 62 formed on the block portion 58 of the rotation block 52. The contact protrusion 76 is formed at a position closer to the end face part 18 than the insertion hole 74, and in the counterclockwise tangential direction in FIG. 2 with the insertion hole 74 as the central axis, that is, the direction from the wall part 16a to the wall part 16b. And abuts against the abutment uneven part 62.

  A pushing portion 78 extends in the radial direction about the insertion hole 74 toward the vicinity of the first latch member insertion port 20 above the insertion hole 74 of the rotating cam 70, that is, near the wall portion 16a. Is formed. A spring holding portion 80 that protrudes toward the rotary cam 70 is provided on the inner side of the upper end edge of the trigger insertion opening 22 of the end face portion 18, and the spring holding portion 80 has a surface facing the pressing portion 78. A cylindrical recess 82 into which a rotating cam return spring 86 described later is fitted is provided. On the surface of the pressing portion 78 that faces the spring holding portion 80, a shaft portion 84 that is fitted inside a rotary cam return spring 86 to be described later is provided.

  A rotating cam return spring 86 is attached between the spring holding portion 80 of the end face portion 18 and the pushing portion 78 of the rotating cam 70. The rotating cam return spring 86 is a coil spring, one end of which is inserted into the recess 82 of the spring holding portion 80 of the end face portion 18, and the shaft portion 84 of the pushing portion 78 of the rotating cam 70 is inserted into the other end. The rotary cam 70 is moderately compressed between 80 and the pressing portion 78, and the rotating cam 70 is urged clockwise around the insertion hole 74 in FIG.

  An abutting surface 88 that is cut out in an L shape is provided on the base end portion of the push portion 78 on the clockwise side. Note that the side surface portion 14 is provided with a locking projection 90 that faces the contact surface 88. The rotating cam 70 is stopped from rotating at a predetermined angle because the contact surface 88 is locked to the locking protrusion 90.

  At a position of the rotating cam 70 that is closer to the wall portion 16c than the insertion hole 74, a rotation protrusion 92 is formed extending substantially in the radial direction about the insertion hole 74 as a central axis and extending substantially horizontally toward the wall portion 16c. ing. The rotation protrusion 92 is formed in a wide rectangular shape, and a pair of upper and lower corner portions are chamfered, and an upper corner portion is an operation portion 94 that abuts on a first interlocking cam 100 to be described later and rotates.

  Cylindrical shaft portions 96 and 98 projecting substantially perpendicular to the side surface portion 14 are provided between the rotation cam 70 and the wall portion 16 c of the side surface portion 14, and the shaft portion 96 is a rotation protrusion of the rotation cam 70. The shaft portion 98 is provided in the vicinity of the operation portion 94 of 92, and is provided below the shaft portion 96, that is, at a position close to the wall portion 16b.

  A first interlocking cam 100 is provided on the shaft portion 96. The first interlocking cam 100 is formed in a substantially V-shape parallel to the side surface portion 14, and a through hole is formed in the intersecting central portion, and is inserted into the shaft portion 96 and is fixed. A gear portion 114 is partially provided on the side peripheral surface of the first interlocking cam 100 in the vicinity of the shaft portion 96.

  One end of the first interlocking cam 100 is formed with an operation protrusion 102 extending toward the first latch member 32. The tip of the operation protrusion 102 is inserted into the concave portion 42 of the first latch member 32, and the portion facing the plate portion 44 slightly bulges toward the plate portion 44 side. The vicinity of the base end portion of the operation projection 102 is a locking projection 103 that bulges toward the rotation projection 92 of the rotary cam 70 and contacts the base end portion of the rotation projection 92. In a portion facing the operation portion 94 at a position closer to the shaft portion 96 than the locking projection 103, an operation concave portion 104 for fitting the operation portion 94 with a slight clearance is formed.

  The other end portion of the first interlocking cam 100 is formed with a pushing portion 106 that extends toward the wall portion 16c. A spring holding portion 108 that protrudes toward the center of the side surface portion 14 is provided at a position below the pushing portion 106 of the wall portion 16c, and the pushing portion 106 of the first interlocking cam 100 is provided in the spring holding portion 108. Is provided with a cylindrical recess 110 into which a first interlocking cam return spring 116 described later is fitted. A shaft portion 112 that is fitted inside a first interlocking cam return spring 116 described later is provided on the surface of the pressing portion 106 that faces the spring holding portion 108.

  A first interlocking cam return spring 116 is attached between the spring holding portion 108 of the wall portion 16 c and the pressing portion 106 of the first interlocking cam 100. The first interlocking cam return spring 116 is a coil spring, one end of which is inserted into the recess 110 of the spring holding part 108 of the wall 16c, and the shaft 112 of the pushing part 106 of the first interlocking cam 100 is inserted into the other end. The first interlocking cam 100 is urged counterclockwise around the shaft portion 96 in FIG. 2 by being appropriately compressed between the spring holding portion 108 and the pushing portion 106. The first interlocking cam 100 is locked with the locking projection 103 coming into contact with the rotating cam 70 and stopped at a predetermined angle.

  A second interlocking cam 118 is provided below the first interlocking cam 100. The second interlocking cam 118 is formed in a substantially V shape in parallel to the side surface portion 14, and a through hole is formed at one end portion thereof and is inserted into the shaft portion 98 and is fixed.

  The second interlocking cam 118 extends obliquely downward from the end portion fixed to the shaft portion 98 toward the lower portion of the rotating cam 70, and is bent near the passage of the rotating protrusion 92 of the rotating cam 70 to be the wall portion 16b. , Passes through the damper 68 and the rod 66, and extends toward a second latch member 124 described later, and the tip becomes an operation protrusion 120. The operation protrusion 120 is inserted into a recess 136 of a second latch member 124 described later, and the tip slightly bulges outward. A gear portion 122 that is combined with the gear portion 114 of the first interlock cam 100 is provided on the side peripheral surface of the second interlock cam 118 near the shaft portion 98. The second interlocking cam 118 is locked with the gear portion 122 being combined with the gear portion 114 of the first interlocking cam 100 and stopped at a predetermined angle. Further, when the first interlocking cam 100 rotates, the second interlocking cam 118 rotates accordingly.

  The wall 16b is provided with a second bearing 123 at a position facing the first bearing 30 of the wall 16a. The second bearing portion 123 protrudes from the inner surface of the wall portion 16b at a substantially right angle. Similar to the first latch member insertion port 20, a cylindrical latch guide 31 is fitted and provided on the inner peripheral surface of the second latch member insertion port 24.

  A second latch member 124 is provided in the second latch member insertion port 24 so as to protrude and retract inside the latch guide 31. The second latch member 124 is provided with a rod-shaped main body 126 having a rectangular cross section, the main body 126 is set in parallel to the wall portion 16b, and the end of the main body 126 on the second latch member insertion port 24 side is The latch head portion 128 is integrally formed. The latch head portion 128 has a constant cross-sectional shape in the vertical direction in the attached state, and the cross-sectional shape in the horizontal direction is such that the portion on the opposite side to the side surface portion 14 is parallel to the side surface portion 14 as shown in FIG. The abutting surface 128a, the portion opposite to the side surface portion 14, is an inclined surface 128b that is continuous with the tip of the abutting surface 128a and intersects the abutting surface 128a at an acute angle. The end portion of the main body 126 opposite to the latch head portion 128 is bifurcated and extends toward the wall portion 16c, and a portion close to the wall portion 16b is formed with a cylindrical shaft portion 130. A flange portion 132 is formed around the tip. The shaft part 130 is slidably held by the second bearing part 123 of the wall part 16 b, and the flange part 132 is located outside the second bearing part 123. A second latch member return spring 134 that is a coil spring is wound around the shaft portion 130. The second latch member return spring 134 is appropriately compressed between the end portion of the main body 126 and the second bearing portion 123 to urge the second latch member 124 toward the outside of the second latch member insertion port 24. Yes. Since the flange portion 132 of the shaft portion 130 is locked to the second bearing portion 123, the second latch member 124 does not come out of the second latch member insertion port 24. The other branched portion of the second latch member 124 is formed such that a recess 136 into which the second interlocking cam 118 is inserted opens on the side opposite to the wall portion 16b. The peripheral surface is a plate portion 138 with which the second interlocking cam 118 abuts.

  The case main body 12 of the latch lock 10 is provided with a lid member 140 that covers an opening surrounded by the wall portion 16 and the end surface portion 18. The lid member 140 is a single plate that closes the opening of the case body 12, and is provided with five through holes 142 that communicate with the screw holes 26 of the case body 12. In addition, a circular through hole 144 into which the shaft portion 72 of the rotating cam 70 is rotatably fitted is provided. At the upper and lower positions of the through hole 144, through holes 146 and 148 communicating with the through hole 29 of the first holding projection 28 of the case body 12 and the through hole 55 of the second holding projection 53 are formed. On the inner side surface of the lid member 140, projections facing the first holding projection 28, the second holding projection 53, the first bearing portion 30, the second bearing portion 123, etc. of the case body 12 are appropriately formed. The lid member 140 is fixed to the case body 12 by inserting screws (not shown) into the through holes 142. Further, the shaft portion 72 of the rotating cam 70 is exposed in the through hole 144 of the side surface portion 14 and the lid member 140, and a shaft member (not shown) is fitted and inserted into the insertion hole 74 of the shaft portion 72. An operation handle (not shown) is attached.

  The latch lock 10 is assembled in this way and attached to the open end of the swinging door. It is embedded in the end face of the open end so that the end face portion 18 of the case main body 12 is flush, and a screw or the like is inserted into the through hole 19 and fixed. The latch lock 10 may be attached upside down.

  A latch receiving member 150 is attached to a pillar, a fixed door, or the like that closes the door to which the latch lock 10 is attached. Here, the latch receiving member 150 will be described. The latch receiving member 150 is a rectangular block body that is long in the vertical direction in the mounted state, and through holes 152 for mounting are formed in the vicinity of the upper and lower ends. A trigger contact protrusion 154 is integrally formed at the center portion of the latch receiving member 150 in the vertical direction. The trigger abutment protrusion 154 has a constant cross-sectional shape in the vertical direction, and the cross-sectional shape in the horizontal direction is an abutment surface 154a having a central portion that protrudes outward and is perpendicular to the protruding direction and is long in the vertical direction. An inclined surface 154b with a smaller amount of protrusion as the distance from the contact surface 154a continues on the right side in FIG. 1 of the contact surface 154a, that is, the side surface 14 side when facing the case body 12, and the left side of the contact surface 154a is As the distance from the contact surface 154a increases, the inclined surface 154c with a small amount of protrusion is continuous and formed in a trapezoidal shape.

  A first latch member accommodating portion 156 is provided between the latch receiving member 150 and the through hole 152 above the trigger contact protrusion 154. The first latch member accommodating portion 156 is cut open to the left in FIG. 1, and the right inner surface is vertical and a contact surface 156a perpendicular to the contact surface 154a of the trigger contact protrusion 154 is formed. ing.

  A second latch member accommodating portion 158 is provided between the latch receiving member 150 and the through hole 152 below the trigger contact protrusion 154. The second latch member accommodating portion 158 is opened by being cut out on the right side in FIG. 1, and a contact surface 158 a perpendicular to the contact surface 154 a of the trigger contact protrusion 154 is formed on the left inner surface. ing. The latch receiving member 150 may be attached upside down.

  Next, the operation of the latch lock 10 of this embodiment will be described. When the door to which the latch lock 10 is attached is opened from the pillar or the like to which the latch receiving member 150 is attached, as shown in FIGS. 2 and 3, the first latch member 32 shown in FIG. 2A and the trigger 46 shown in FIG. The second latch member 124 shown in FIG. 2C is in a protruding state. At this time, the rotary block 52 connected to the trigger 46 is in a state where the damper 68 protrudes. Has stopped. Since the rotating cam 70 does not rotate, it is impossible to operate the handle, and the first latch member 32 and the second latch member 124 cannot be moved backward.

  Next, the case where a door is closed to a pillar etc. is demonstrated. For example, when closing from the left side of the latch receiving member 150 in FIG. 1, that is, when closing the latch receiving member 150 from the side surface 14 side of the case body 12, the first latch member 32 and the second latch member 124 protrude. In this state, the first latch member 32 comes into contact with the left side of the latch receiving member 150, and the first latch member 32 enters the first latch member containing portion 156 because the first latch member containing portion 156 is opened on the left side, and is brought into contact with the contact surface 156a and locked. The The second latch member 124 hits the side surface of the latch receiving member 150 in the vicinity of the second latch member accommodating portion 158, and the inclined surface 128 b of the latch head portion 128 of the second latch member 124 is pushed to cause the second latch member return spring 134 to move. After being compressed, the second latch member 124 moves backward, climbs over the side surface of the latch receiving member 150 and enters the second latch member accommodating portion 158. Thereafter, the second latch member return spring 134 is restored and the second latch member 124 is A second latch member accommodating portion 158 is accommodated. At this time, as shown in FIGS. 4 and 5, the first latch member 32 and the second latch member 124 are formed in the first latch member housing portion 156 and the second latch member housing portion 158 that are opened on the opposite sides. It is accommodated, abuts against the abutment surfaces 156a and 158a, and is securely locked to the latch receiving member 150.

  Then, the inclined surface 46b of the trigger 46 hits the inclined surface 154c of the trigger contact protrusion 154 and is pressed to compress the trigger return spring 61 so that the trigger 46 is retracted. The protruding portion 46a is in contact with and retracted. At this time, immediately after closing, the trigger return spring 61 that is easily elastically deformed is compressed, and the damper 68 acts as a resistance, so that the rotary block 52 moves backward slowly. For this reason, the contact concavo-convex portion 62 is engaged with the contact protrusion 76 of the rotating cam 70 so as to be locked, and the rotation of the rotating cam 70 is stopped. Since the rotating cam 70 does not rotate, it is impossible to operate the handle, and the first latch member 32 and the second latch member 124 cannot be retracted. Also from this point, the latch receiving member 150 is reliably engaged. Stopped. The same applies when closing from the right side of the latch receiving member 150 in FIG.

  Next, after the door is closed and a certain time has elapsed, will be described. After the door is closed, as shown in FIG. 6, the damper 68 is applied with a force in the compression direction by the compressed trigger return spring 61, and the rod 66 is gradually retracted, and the trigger return spring 61 is restored accordingly. And it gets longer. As a result, the rotary block 52 moves to the damper 68 side, the contact projections and depressions 62 of the block portion 58 of the rotary block 52 are separated from the contact protrusions 76 of the rotary cam 70, and the rotary cam 70 becomes rotatable. When the rotary cam 70 becomes rotatable, the first latch member 32 and the second latch member 124 can be moved backward by a handle operation (not shown). However, when the handle is not operated, the rotary cam 70 is biased to the same position as the locked state by the rotary cam return spring 86, and the first interlocking cam 100 is also stopped by the first interlocking cam return spring 116. The latching protrusion 103 is separated from 32 and biased to a position where it comes into contact with the rotating cam 70, and the door does not open carelessly.

  When the door is opened, a handle (not shown) is operated to rotate the rotating cam 70 about the shaft portion 72 counterclockwise against the rotating cam return spring 86. Then, as shown in FIG. 7, the operating portion 94 of the rotating projection 92 of the rotating cam 70 pushes the operating recess 104 of the first interlocking cam 100, and the first interlocking cam 100 is centered around the shaft portion 96. Rotate clockwise against cam return spring 116. Then, the operation projection 102 of the first interlocking cam 100 pushes the plate portion 44 of the first latch member 32 and retracts against the first latch member return spring 40. At this time, since the gear portion 122 of the second interlocking cam 118 is combined with the gear portion 114 of the first interlocking cam 100, the second interlocking cam 118 is centered on the shaft portion 98 as the first interlocking cam 100 rotates. Rotate counterclockwise. Then, the operation protrusion 120 of the second interlocking cam 118 pushes the plate portion 138 of the second latch member 124 and retracts against the second latch member return spring 134.

  At this time, as shown in FIG. 8, the first latch member 32 and the second latch member 124 are retracted, and the latch head portions 36 and 128 are accommodated in the first latch member accommodating portion 156 and the second latch member accommodating portion of the latch receiving member 150. The latch 158 can be pulled out of the portion 158 to release the engagement, and can be opened on either the left or right side of the latch receiving member 150.

  According to the latch lock 10 of this embodiment, the door can be opened and closed in both directions with respect to the position where the door is closed with a simple structure. When the door is closed, the door is inadvertently passed through the closing position. The door can be securely closed. The door is never opened because it was closed, and it does not take time to close and close the door.

  In addition, the latch lock of this invention is not limited to said each embodiment, The shape and attachment position of each member can be changed suitably. The structure of the handle for rotating the rotating cam can be freely set, and the rotating cam may be rotated when the handle is pushed against the door. The latch lock can be attached to a door for various uses, and the one to which the latch receiving member is attached can be freely changed such as a fixed door, a frame, and a gate. The time required for handle operation after the door is closed can be adjusted by changing the strength of the damper or trigger return spring.

It is a disassembled perspective view of the latch lock of one Embodiment of this invention. It is a front view showing the state where the door which attached the latch lock of the latch lock of this embodiment is opened. It is the bottom view seen from A, B, C of FIG. It is a front view which shows the state immediately after the door which attached the latch lock of the latch lock of this embodiment was closed. It is the bottom view seen from A, B, C of FIG. It is a front view which shows the state which predetermined time passed, after the door which attached the latch lock of the latch lock of this embodiment was closed. It is a front view which shows the state which performed operation which opens the door which attached the latch lock of the latch lock of this embodiment. It is the bottom view seen from A, B, C of FIG.

Explanation of symbols

10 latch lock 12 case main body 20 first latch member insertion port 22 trigger insertion port 24 second latch member insertion port 32 first latch member 40 first latch member return spring 46 trigger 52 rotation block 58 block portion 61 trigger return spring 70 rotation Cam 68 Damper 100 First interlocking cam 118 Second interlocking cam 124 Second latch member 134 Second latch member return spring 150 Latch receiver 154 Trigger abutment projection 156 First latch member accommodating portion 158 Second latch member accommodating portion

Claims (2)

  A case body provided near the open end of the swinging door, a pair of latch members projecting from the case body, a latch member return spring for biasing the pair of latch members in the projecting direction, and the pair of latches A rotating cam that moves the member back against the latch return spring, a handle member connected to the rotating cam, a rotating block that stops rotating by contacting the rotating cam, and the rotating block contacts the rotating cam. A damper that acts as a resistance to movement between a contact position and a retracted position; a trigger that is attached to the opposite side of the damper of the rotating block and that protrudes from the case body in parallel with the latch member; and A trigger return spring is provided that urges with a force stronger than the return spring of the damper in a direction away from the rotating block, and the open end of the door faces. The material is provided with a latch member accommodating portion which is a recess for accommodating the pair of latch members, and a trigger abutting protrusion with which the trigger abuts in a state of retreating against the trigger return spring. And latch lock. The trigger is a protrusion whose central portion is located at the tip, and is formed in an isosceles triangle shape with inclined surfaces provided on both sides of the swinging direction of the door of the protrusion. The center portion is a contact surface located at the tip, and inclined surfaces are provided on both sides of the contact surface in the swinging direction of the door to form a trapezoidal shape, while the door is being closed, One of the pair of inclined surfaces of the trigger contacts one of the inclined surfaces of the trigger contact protrusion, the trigger is retracted against the trigger return spring, and when the door is closed, The latch lock according to claim 1, wherein the protrusion of the trigger comes into contact with the contact surface of the trigger contact protrusion and the trigger is retracted.

Images