JP4820725B2 - Locking device - Google Patents

Description

  The present invention relates to a locking device that locks the opening and closing of an opening / closing body such as a hinged door or an opening door.

Latch locks that lock the opening and closing of doors and doors are known.
However, when closing a door, the conventional latch lock is guided by the guide slope of the latch bolt head just by shaking the knob or handle and closing the door. Although it is easy to operate because it protrudes to the side and locks, the latch bolt just protrudes to the latch receiving side, so it is easy to lock the latch bolt when the door opens due to external force etc. There was a technical problem that would be missed.
Japanese Patent Application Laid-Open No. 51-5196 discloses a locking device that latches a hook portion of a latching bracket on a receiving-side latching rod, but requires an operation of locking in addition to a door closing operation. It is inferior to the opening and closing of the door.

Japanese Patent Laid-Open No. 51-5196

An object of the present invention is to provide a novel locking device that improves the locking performance of an opening door or the like while maintaining excellent opening / closing operability of a door or the like by a latch lock.

The lock device according to the present invention includes a lock body for attaching to an open end that swings in the front-rear direction of the open door, and a fixed frame that fixes the open end in a closed state of the door. A latch receiver for mounting , and the latch receiver has a fitting portion and a latch receiving portion of the head portion of the latch member protruding and retracting from the lock body, and the head portion of the latch member is provided when the door is closed. The lock body has a guide slope formed of a slope in the front-rear direction for guiding the latch member to slide into the latch holder side, and the lock body includes a latch member biased in the protruding direction, and a latch member immersion operation means. , And a movement guide means for the latch member. The movement guide means has a rotation fulcrum pin and a guide pin on one of the latch member and the base on the side of the lock body case, and the rotation fulcrum pin on the other side in the horizontal direction. And a guide groove that moves relative to And an inclined guide groove having an inclined portion in the vertical direction to guide the rotation fulcrum pin and latch member protrudes along the guide groove is only horizontally moved along the guide groove, but the guide pin inclination The hook-shaped latching portion provided on the head portion is rotated toward the latching receiving portion of the latch receiving tool by tilting and moving along the vertical tilting portion of the guide groove. It is characterized by hanging.

Since the head portion of the latch member has a guide slope inclined in the front-rear direction, when the door is closed, the latch member retracts against the urging force in the protruding direction and is positioned at the insertion portion of the latch receiving member. (Latch bolt) protrudes.

The technical gist of the invention described in claim 2 is characterized in that the lock body has a locking means for restricting the backward movement of the latch member.
Thereby, the latching | locking part of the head part of a latch member is locked in the state latched by the latching receiving part of a latch receptacle.

In the locking device according to the present invention, the latch member is inclined while being latched, and the latch member is inclined to latch the latch portion provided on the head portion on the latch receiving portion provided on the latch receiver. Even when a force is applied to the door to remove the head portion from the latch receptacle, the latch portion can be prevented from being caught by the latch receptacle portion and the door being opened.
In particular, a rotation fulcrum pin and a guide pin are provided on either the latch member or the lock body case side, and the latch member protrudes in addition to the guide groove of the rotation fulcrum pin that guides the latch member to be retracted on the other side. Since the inclined guide groove of the guide pin with which the head portion is inclined is provided, the locking member has a high locking force because the head portion of the latch member is latched with the latch receiver when the latch member protrudes.

Hereinafter, an example of a door locking device according to the present invention will be described with reference to the drawings.
FIG. 1 is an explanatory view of the internal structure of the lock device. FIG. 1A shows a state in which the head portion 31 of the latch member 30 is fitted into the latch locking hole 82 and the door is closed, and FIG. A state in which the latch member 30 is retracted by an operation so that the door can be opened is shown.
The lock device 10 includes a lock body 20 and a latch receiver 80, and the lock body 20 is mounted on the swinging door side to elastically bias the head portion 31 of the latch member 30 from the open end of the door. The latch receiver 80 is attached to a fixed side frame for fixing the door and receives the head portion 31 of the latch member 30.
FIG. 2 shows a perspective explanatory view of the internal structure of the lock body 20.
In FIG. 1, the door and the fixed side frame are not shown. In FIGS. 1 and 2, a part of the base 40 of the lock body 20 and the case 85 of the latch receiver 80 are shown so that the internal structure of the lock device can be understood. Only the main part is drawn.
The latch receiver 80 includes a receiving seat 81 that has a metal plate that penetrates the head portion 31 of the latch member 30 and is provided with a latch locking hole 82, and a latch locking hole 82 that the receiving seat 81 forms. A case 85 is provided with a fitting portion 83 into which the head portion 31 of the latch member 30 can be fitted.
Inside the lock body 20, a latch member 30, an elastic biasing member (coil spring) 43, a handle operation body 50, a latch drive body 60, and a lock operation body 70 are disposed.
The latch member 30 has a head portion 31 at the tip of the base portion 34, and the head portion 31 is provided with a guide inclined surface 33 and a hook-shaped hooking portion 32.
As shown in FIG. 2, when the door is closed, the guide slope 33 slides into contact with the edge of the receiving seat 81 of the latch receiver 80 and guides it by the slope, and elastically biases the protruding latch member 30 to protrude. It is provided to retreat against the urging force.
When the latch member 30 protrudes from the retracted position shown in FIG. 1B and the head portion 31 is inserted into the latch locking hole 82, the rotation fulcrum pin 42 and the guide pin 41 provided on the base portion 34 are formed as described later. By being guided by the guide groove 35, it is inclined by a predetermined angle as shown in FIG.
Then, the latching portion 32 is latched to the latch receiving portion 84 formed at the edge of the latch locking hole 82 by inclining by a predetermined angle while being inserted into the latch locking hole 82 in this manner.
Here, when the latching portion 32 is located behind the latch locking hole 82 with respect to the latch receiving portion 84 and the head portion 31 of the latch member 30 moves away from the latch locking hole 82, the latching portion 32 is latched. The hook shape of the portion 32 is hooked on the latch receiving portion 84, and the head portion 30 is prevented from coming out of the latch locking hole 82.
In the base portion 34 of the latch member 30, guide grooves 35 that are open on both the front side and the back side in FIG. 1 are provided, and the opening portions on both sides of the guide groove 35 are provided on the base 40 on the case side of the lock body. A rotation fulcrum pin 42 and a guide pin 41 are inserted.

The guide groove 35 shown in FIG. 1 shows an example in which the guide groove for the rotation fulcrum pin 42, the guide groove for the guide pin 41, and the inclined guide groove are continuously formed as one groove. Guide grooves for guide pins may be formed separately.
In the example shown in FIG. 1, the guide pin horizontal guide groove 35 a and the rotation fulcrum pin guide groove 35 c are positioned on the front side and the rear side in the protruding direction of the latch member 30, respectively. The grooves are formed in parallel and are shifted from each other by a predetermined width in the groove width direction.
An inclined guide groove 35b is provided by bending the guide groove 35 at an obtuse angle from the rear end of the guide pin horizontal guide groove 35a in the protruding direction of the latch member 30 with respect to the guide pin horizontal guide groove 35a. The inclined guide groove 35b connects the guide pin horizontal guide groove 35a and the rotation fulcrum pin guide groove 35c.
The guide groove 35, the rotation fulcrum pin 42, and the guide pin 41 linearly guide the rotation fulcrum pin 42 with the rotation fulcrum pin guide groove 35c, and guide the guide pin 41 with the guide pin horizontal guide groove 35a. When the head portion of the latch member is protruded from the retracted position of the latch member shown in FIG. 1B, the latch member 30 is linearly guided to a predetermined position so that the head portion 31 is inserted into the latch locking hole 82. It is.
Then, the guide pin 41 is guided in the inclined direction with respect to the latch member protruding direction by guiding the guide pin 41 from the guide pin horizontal guide groove 35a to the inclined guide groove 35b in a state where the head portion 31 is inserted into the latch locking hole 82. Thus, the latch member 30 is inclined as a rotation fulcrum while the rotation fulcrum pin 42 is guided by the rotation fulcrum pin guide groove 35c.
The latch member 30 is thus guided by the guide groove 35, the rotation fulcrum pin 42, and the guide pin 41 and inserted into the latch locking hole 82, so that the latch member 30 is inclined to a predetermined angle at the protruding position. Is latched to the latch receiving portion 84.
In the embodiment shown in FIG. 1, a guide groove is formed on the latch member side, but a guide groove and a pivot fulcrum pin may be provided on the latch member by conversely forming a guide groove on the pedestal side.
The latch member 30 has one end of an elastic urging member (coil spring) 43 attached to an elastic urging member holder 44 provided on the pedestal 40 and the other end attached to a spring receiving portion 36 provided on the base 34 to open an open end of the door. It is elastically urged in the direction protruding from.
A handle operating body 50 and a latch driving body 60 are pivotally mounted on the pedestal 40 in order to move the latch member 30 backward.
The handle operating body 50 is provided with an operation arm 51 and a handle shaft hole 52 and is elastically biased by a spring 54. A handle (not shown) attached to the handle shaft hole 52 resists the elastic biasing force of the spring 54. If operated, the operation arm 51 swings.
The latch driving body 60 is provided with an arm receiving portion 61 and an interlocking arm 62, and the operating arm 51 of the handle operating body 50 swings and pushes the arm receiving portion 61 to rotate the latch driving body 60, thereby interlocking the arm. 62 is swung.
As a result, the handle operating body 50 and the latch driving body 60 swing the interlocking arm 62 by operating the handle when the latch member 30 is in the protruding position, as shown in FIG. The rotation guide inclined surface 37a of the driving force receiving portion 37 provided so as to protrude from the portion 34 is slid and pressed by the interlocking arm 62 to drive the latch member 30 backward.
When the latch member 30 receives the pressing force of the interlocking arm 62 on the rotation guide inclined surface 37a of the driving force receiving portion 37 in the latched state shown in FIG. 1A, the guide pin 41 is guided in the inclined guide groove 35b. It is moved to the boundary with the horizontal guide groove 35a and rotated so as to return in parallel with the rotation fulcrum pin 42 as the rotation axis to release the latch, and the pressing force of the interlocking arm 62 is slid by the rotation guide slope 37a. While receiving in contact, the pivot fulcrum pin 42 and the guide pin 41 are rectilinearly guided by the pivot fulcrum pin guide groove 35c and the guide pin horizontal guide groove 35a to retract to the retracted position shown in FIG.
The backward driving operation of the latch member 30 can be performed when a lock operating body 70 described later removes the end of the lock arm portion 73 from the lock receiving portion 34a and releases the lock as shown in FIG. I can do it.
As shown in FIG. 2, an inner key 71 and a lock portion 72 for rotating the lock operation body 70 are connected to both ends of the shaft portion 74 in the lock operation body 70 (in the case of an inner opening door).
Further, the shaft portion 74 of the lock operating body 70 is provided with a lock arm portion 73 in the axial radial direction, and is cut out at a predetermined position on the outer periphery of the shaft portion 74 by an axial plane as shown in FIG. A flat portion 74a is provided.
Then, two leaf springs 45 provided with the leaf spring holder 46 on the base 40 are slidably contacted with the side surface of the shaft portion 74 from both sides of the shaft portion 74 with the leaf spring 45 being bent.
The lock operating body 70 swings the lock arm portion 73 by a turning operation by inserting a key of the lock portion 72 or a turning operation of the inner key 71, and the end of the lock arm portion 73 is moved by the swinging of the lock arm portion 73. The latch member 30 in the protruding position is applied to the rear end portion.
Since the lock receiving portion 34a for fitting the end portion of the lock arm portion 73 is formed at the rear end portion of the latch member 30, the latch member 30 in the projecting and inclined state is rotated by inserting the key of the lock portion 72. The end of the lock arm 73 driven by the moving operation or the turning operation of the inner key 71 is fitted into the lock receiving portion 34a, and the guide movement by the guide groove 35 and the pins 41 and 42 is locked to fix the position. .
When the end of the lock arm portion 73 is fitted to the lock receiving portion 34a of the latch member 30 in the protruding position in this way, the lock operating body 70 is set so that the position of the flat surface portion 74a coincides with the position of the leaf spring 45 at the same time. The leaf spring 45 is pressed against the flat surface portion 74a to fix the rotation of the shaft portion 74, and the lock arm portion 73 keeps the latch member locked.

Next, operation | movement of the locking device 10 when opening and closing a door is demonstrated using explanatory drawing of FIG.
3A shows a state in which the door 1 is opened by swinging, FIG. 3B shows a state in the middle of closing the door 1, FIG. 3C shows a state in which the door 1 is closed, 3 (d) shows a state in which the handle (not shown) is operated to start the backward driving of the latch member 30.
FIG. 3 illustrates only the main part of the fixed side frame 2 such as the lock device 10, the door 1 to which the lock body 20 is attached, and the pillar to which the latch receiver 80 is attached and the counterpart door.
As shown in FIG. 3A, when the door 1 is opened and the handle (not shown) attached to the handle shaft hole 52 of the handle operating body 50 is not operated, the elastic biasing force of the elastic biasing member 43 is used. The latch member 30 protrudes from the open end 1a of the door.
When the door 1 is closed from the state of FIG. 3A, the head portion 31 of the latch member 30 hits the receiving seat 81 of the latch receiver 80 at the guide slope 33 portion shown in FIG. Guided and retracted as shown in FIG. 3B against the elastic biasing force of the elastic biasing member 43.
At this time, the latch member 30 moves the guide pin 41 in the inclined guide groove 35b to return from the inclined state to the parallel state with the rotation fulcrum pin 42 as the rotation axis, and the guide pin 41 is moved horizontally from the inclined guide groove 35b. The rotation fulcrum pin 42 is guided and moved by the rotation fulcrum pin guide groove 35c by being fitted in the guide groove 35a and moved in a rectilinear direction.
When the door 1 is closed, the position of the head portion 31 of the latch member 30 is aligned with the position of the latch locking hole 82, and the head portion 31 of the latch member 30 is latched by the latch receiving member 80 by the elastic biasing force of the elastic biasing member 43. The latch locking hole 82 is inserted and protruded.
The latch member 30 moves the guide pin 41 from the guide pin horizontal guide groove 35a to the inclined guide groove 35b to project the rotation fulcrum pin 42 to the rotation fulcrum pin guide groove when protruding through the latch locking hole 82. As shown in FIG. 3C, the latching portion 32 is inclined at a predetermined angle at which the latch member 30 protrudes as a rotation shaft while linearly guiding at 35 c.
In the state where the door 1 shown in FIG. 3C is closed, the movement of the head portion 31 of the latch member 30 in the opening direction of the door 1 is regulated by the edge of the latch locking hole 82 of the latch receiver 80, The state where 1 is closed is maintained.
When the handle operating body 50 is rotated by operating the handle from the state shown in FIG. 3C, the handle operating body 50 is rotated and the arm receiving portion 61 of the latch driving body 60 is pushed by the operating arm 51 to latch the driving body. 60 is rotated.
The latch driver 60 pivots to swing the interlocking arm 62, and applies a pressing force for driving the latch member 30 backward to the driving force receiving portion 37 of the latch member 30 at the end of the interlocking arm 62.
When a pressing force for backward driving is applied from the interlocking arm 62 to the rotation guide slope 37a of the driving force receiving portion 37, the latch member 30 first moves the guide pin 41 from the inclined guide groove 35b about the rotation fulcrum pin 42 as an axis. By rotating to move to the boundary with the guide pin horizontal guide groove 35a, it returns to the parallel state as shown in FIG.
Then, the guide pin 41 is fitted into the guide pin horizontal guide groove 35a while the pressing force of the interlocking arm 62 is received in sliding contact with the rotation guide slope 37a, and the rotation fulcrum pin 42 is guided by the rotation fulcrum pin guide groove 35c, The guide pin 41 is guided by the guide pin horizontal guide groove 35a to linearly drive the latch member 30 until it reaches the retracted position as shown in FIG.
When the latch member 30 is in the retracted position as shown in FIG. 1B, the door can be opened.

Next, the locking device 10 when locked is described with reference to FIG.
The locking device 10 is locked by inserting a key into the locking portion 72 shown in FIG. 2 and turning it from the state shown in FIG.
Since the lock portion 72 and the inner key 71 are connected to the lock operation body 70, the lock operation body 70 is rotated by the rotation operation by the key of the lock portion 72 or the rotation operation of the inner key 71.
As shown in FIG. 4, the lock operating body 70 rotates to fit the end of the lock arm portion into the receiving portion 34 a at the rear end of the latch member 30 at the protruding position, thereby guiding the guide groove 35 of the latch member 30. The guide movement by the pins 41 and 42 is locked.
Then, the leaf spring 45 comes into pressure contact with the flat surface portion 74a of the shaft portion 74 at an angle at which the latch member 30 is locked, and the lock operating body 70 is fixedly rotated while the latch member 30 is locked.
Since the latch member is inclined at a predetermined angle to latch the latching portion 32 to the latching receiving portion 84, for example, the door 1 is forced to be bent in the opening direction as shown in FIG. Even when the latch member 30 is pulled out from the latch locking hole 82, the latching portion 32 is prevented from being hooked on the latch receiving portion 84 and the latch member 30 coming out of the latch locking hole 82 to release the door. .
Since this locking device is latched by the protrusion of the latch member as shown in FIG. 1A, the latching portion 32 is latched even when some strong force is applied in the direction of opening the door without operating the handle. The latch member 30 is prevented from coming out of the latch engagement hole 82 and being opened on the stop receiving portion 84.
In the present invention, as shown in FIG. 6, a female screw part 86b is formed in the inner cover 86a, and an elongated hole 83a in the vertical direction is provided in the latch receiving part base. As shown in FIG. The position may be adjusted and fixed with a screw 83c or the like.

An explanatory view of the internal structure of the locking device is shown, (a) shows a state in which the latch member is inserted into the latch locking hole and the door is closed, and (b) shows the latch member being retracted by a handle operation to open the door. It shows the state that can be done. The perspective explanatory view of the internal structure of a lock main part is shown. Operation | movement explanatory drawing of the locking device when opening and closing a door is shown. The explanatory view of the locked locking device state is shown. Explanatory drawing of the state when the strong force which opens a door is added is shown. The example which provided the latch position adjustment mechanism in the latch receptacle is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Door 1a Open end 2 of a door Fixed side frame 10 Locking device 20 Locking body 30 Latch member 31 Head part 32 Latching part 33 Guide slope 34 Base part 34a Lock receiving part 35 Guide groove 35a Guide pin horizontal guide groove 35b Inclined guide Groove 35c Rotating fulcrum pin guide groove 36 Spring receiving portion 37 Driving force receiving portion 37a Rotating guide slope 40 Base 41 Guide pin 42 Rotating fulcrum pin 43 Elastic urging member 44 Elastic urging member holder 45 Plate spring 46 Plate spring holder 50 Handle operating body 51 Operating arm 52 Handle shaft hole 53 Spring receiver 54 Spring 60 Latch driving body 61 Arm receiving section 62 Interlocking arm 70 Lock operating body 71 Inner key 72 Locking section 73 Lock arm section 74 Shaft section 74a Plane section 80 Latch receiver 81 Receiving Seat 82 Latch Locking Hole 83 Inserting Portion 84 Hooking Receiving Portion 85 Latch Receiving Case 6 in the cover

Claims (2)

A lock body for attaching to the open end that swings in the front-rear direction of the door, and a latch holder for attaching to the fixed side frame that fixes the open end in a closed state of the door Prepared,
The latch receiver has a fitting portion and a latch receiving portion of the head portion of the latch member protruding and retracting from the lock body,
The head portion of the latch member has a guide slope formed by a slope in the front-rear direction for guiding the latch member to slide in and slide into the latch receiver when the door is closed,
The lock body has a latch member urged in the protruding direction, an immersion operation means for the latch member, and a movement guide means for the latch member,
The moving guide means has a pivot fulcrum pin and a guide pin on one of the latch member and the base on the side of the lock body case, and guides the guide pin on the other side and a guide groove for relatively moving the pivot fulcrum pin in the horizontal direction. vertical and an inclined guide groove having an inclined portion, although the latch member is the pivot fulcrum pin and protrudes along the guide groove only horizontally moved along the guide groove, the guide pin is inclined guide grooves The hook-shaped latching portion provided on the head portion is rotated toward the latching receiving portion of the latch receiver by being tilted and moved along the vertical tilting portion of the latch and latched on the latching receiving portion. A locking device characterized by: Tablets body lock device according to claim 1, characterized in that it has a locking means for restricting the retraction of the latch member.

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