JPH09317286A - Door end lock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the diameter of a hole for fitting a case of a sliding door by providing a locking mechanism to open/close of a pair of hooks in a storage chamber slender in the longitudinal direction of the case. SOLUTION: A lock case 20 slender in the longitudinal direction is fixed to a lock storage hole in an end face of a sliding door. When a handle for manual operation of a thumb turn mounted on an indoor side escutcheon is turned in the locking condition in the closed-door condition, a cam 32 is turned counterclockwise, a joint plate 47 is advanced by the forward tuning of a drive shaft 37, and a sliding plate 43 is pressed. When the plate 43 is advanced to the stopper position, and a retractor is slightly advanced, a hook pin 64 is in an unlocking groove part of the retractor, and a pair of hooks 45, 46 enter a receiving hole 91 of the strike in the closed condition. In addition, when the cam 32 is turned, the pin 36 is also turned, the refractor is returned backward, and the hook pin 64 is moved to a locking groove part of the retractor to open the hooks 45, 46, and engaged with the receiving hole 91. The structure can be miniaturized and locking/unlocking is smooth.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door lock provided at the tip of a sliding door to lock and unlock the sliding door.

[0002]

2. Description of the Related Art A locking device for a sliding door includes a combination lock for locking the mating portions of a closed two-piece sliding door with each other, and a door tip for locking the tip of the closed sliding door to a frame-side column. There is a lock, and as each locking device, a locking device of a type called a sickle lock is generally used. Explaining the main points of the sickle lock type door end lock, as shown in FIG. 9 and FIG.
At the front end of the case 1, a second front surface 2 which is a front wall of the case 1 extends in the vertical direction in the case 1.

The case 1 is inserted into the mounting hole provided on the front end surface of the sliding door D, the front 3 is placed on the surface of the second front 2, and a screw (not shown) penetrating the front 3 and the second front 2 is attached to the sliding door D. The case 1 is fixed by being screwed onto the tip surface. Front 3 and second front 2
A sickle retracting hole 4 is provided in the head, and a head 6a of a sickle 6 is pivotally attached to a support shaft 5 fixed to the inner wall of the case 1 (see FIG. 10).

The sickle 6 is provided with an engaging claw 6c at the tip of an arm 6b bent and extended from the head 6a, and the entire shape is formed substantially in a U-shape. A bent guide slot 7 is provided. Rotating plate 8 pivotally attached to case 1
Is provided with a drive pin 9 which is loosely fitted in the elongated guide hole 7, and the supporting piece 10 provided on the inner surface of the side wall of the case 1 is urged by the sickle 6 to an unlocking angle shown by a solid line and a locking angle shown by a chain line. The spring 11 is attached (see FIG. 10). Reference numeral 17 shown in FIGS. 9 and 10 is an escutcheon provided on the surface of the sliding door D on the outdoor side and the indoor side.

The strike 12 provided on the pillar on the frame side is
A strike plate 14 that covers the front surface of strike box 13 is fixed by screws 15 to the surface of strike box 13 having a concave central portion. The strike plate 14 is provided with a receiving hole 16 for receiving the engaging claw 6c of the sickle 6 which rotates at the locking angle, and when the sickle 6 rotates to the locking angle shown by the dashed line, the engaging claw 6c becomes as shown by the dashed line. At the same time, the sliding door D is locked.

[0006]

In the case 1, there is a sickle 6
A storage space for rotating the locking and unlocking angles is required, and the spring 11 and the rotating plate 8 are provided above and below the sickle 6.
Therefore, the shape of the case 1 must be a rectangle having a large dimension in the vertical direction or a round shape having a large diameter. The strike 12 also requires a space for avoiding interference with the rotating engaging claw 6c, and is longer in the vertical direction.

When the case 1 has a vertically long rectangular shape, if the sliding door is made of aluminum sash and the tip portion is a tubular member, a rectangular mounting hole can be formed in the leading end surface of the sliding door. In the case of wood, engraving a rectangular mounting hole is a troublesome and laborious task.
When the case 1 has a circular shape, there is a problem that a mounting hole having a large diameter must be processed.

Further, when the sickle 6 is rotated to the locking position shown by the chain line, a gap c is required to avoid interference with the strike plate 14, and at least the sliding door D is locked even after the door lock is locked. Rattling corresponding to the gap c is generated. An object of the present invention is to solve the problem, and to provide a door end lock that can make a mounting hole of a sliding door a circular hole having a small diameter and can reduce rattling of the door after locking. It is a thing.

[0009]

In order to achieve the above object, the door lock of the present invention is formed with a long and narrow accommodation chamber in the front-rear direction, and a front end having a sickle retracting hole is provided at the front end of the accommodation chamber. A case having a cam insertion hole intersecting with the accommodating chamber and internally provided in a mounting hole on the front end surface of the sliding door; and a case rotatably inserted into the cam insertion hole and rotated to a locking angle. Sometimes a cam having a drive shaft that moves in the front direction, a joint plate pivotally mounted on the drive shaft and having a drive elongated hole and a pushing piece, and a guide elongated hole into which a sickle pin is loosely fitted are provided. A pair of plates that can move back and forth in the accommodating chamber, a support shaft that connects the front end of the plates, a connecting pin that loosely fits in the drive long hole, and a sliding plate that has a joint spring that contacts the pushing piece. , The middle part is pivotally attached to the above spindle, The ends have locking claws protruding in mutually opposite directions, and a pair of sickles whose rear ends are pivotally attached to one ends of the sickle pins and cam grooves into which the other ends of the sickle pins are inserted respectively. And a lock groove portion for guiding the both sickles in the protruding direction of the lock claws, respectively, on the front surface of the cam groove. It is what

The tip surface of the locking claw may be provided with an inclined surface which produces a component force for rotating the pair of sickles in the closing direction when hitting the tip of the strike receiving hole. The retractor is provided so as to be movable back and forth in the accommodating chamber, a spring for urging the cam toward the cam is provided, a guide groove that is substantially perpendicular to the moving direction is provided on the retractor, and the retractor is inserted into the guide groove. By providing the click pin, the click mechanism for urging the cam to the lock angle and the unlock angle can be configured. A color plate that color-codes a locking angle and an unlocking angle is fixed to the operation shaft that rotates the cam, and the outer escution of the sliding door locks the color plate at the locking and unlocking angles of the cam. It is advisable to provide an inspection window through which the color-coded display area for unlocking is seen.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view showing the relationship between a door end lock in an unlocked state and a strike, and FIG. 2 is attached to a sliding door. FIG. 8 is a cross-sectional view of the door lock thus obtained, and FIG. 8 is an exploded perspective view of the door lock. The door lock case 20 includes a case body 21,
The cover 23 is overlapped with the joint surface 22 formed on the case body 21, and when the cover 23 is overlapped, a housing chamber 24 having a substantially rectangular cross section is formed inside the case 20 and opens to the front surface of the case 20. It

A flange 25 is provided at the tip of the case body 21, and mounting holes 26 are provided at the upper and lower portions of the flange 25. The case body 21 behind the flange 25 (on the right side in FIG. 8) has an outer peripheral surface. Circular area 21
An oval-shaped region 21b having a width narrower than that of the circular portion is connected to the rear of a, and a joint surface 22 for superimposing the cover 23 is formed rearward from the middle portion of the circular region 21a. A fitting protrusion 27 that fits into two engagement grooves (not shown) provided in the cover 23 is provided at the front end portion (see FIG. 8).

The outer peripheral surface of the cover 23 has a circular area 23a and an oval-shaped area 23b, like the case body 21, and two screw insertion holes 5 are formed in the oval-shaped area 23b.
1, 52 are provided, and screws (not shown) inserted into the screw insertion holes 51, 52 are screwed into the screw holes 53, 54 provided in the joint surface 22, so that the cover 23 is covered with the case body 21. (See FIG. 8).

On the front surface 28 attached to the front surface of the flange 25, a sickle withdrawal hole 29 communicating with the accommodation chamber 24 is formed.
And a mounting hole 30 opposed to the mounting hole 26 are provided, and after the case 20 is inserted into the lock housing hole 74 (see FIG. 2) provided on the end surface of the sliding door D, the mounting holes 26, 30 The case 20 is fixed to the sliding door D by screwing a screw (not shown) inserted in the sliding door D into the sliding door D. The case 20 is provided with a cam insertion hole 31 that intersects the accommodation chamber 24 at a right angle and penetrates both side surfaces of the case 20 (see FIG. 8).

Shafts 33 provided on both surfaces of the cam 32 are rotatably inserted into the cam insertion hole 31. Arms 34 and 35 protruding from the outer peripheral surface are provided on the cam 32, a pin 36 is provided on the front arm 34, and a drive shaft 37 is inserted and fixed in a hole provided in the rear arm 35. A central portion of an operation shaft 39 formed on a square shaft is inserted into a square hole 38 provided at the center of rotation of the cam 32 (see FIGS. 2 and 8).

Inside the accommodation chamber 24, a pair of retractors 4 slidable in the front-rear direction along both inner wall surfaces of the accommodation chamber 24.
0, 41, a sliding plate 42 provided inside the retractors 40, 41 with a pair of plates 43, 44 slidable in the same direction, and a space formed between the pair of plates 43, 44. The sickles 45 and 46 housed in the space in front of them
Then, the joint plate 47 accommodated in the rear space is arranged (see FIGS. 2 and 8).

The joint plate 47 has a pushing piece 48 bent and extended at the tip, a hole 49 into which the drive shaft 37 is loosely fitted, is provided at the rear end, and a long drive portion in the front-rear direction is provided at the middle portion. An elongated hole 50 is provided. The sliding plate 42 has corners 43a and 44 at the top ends of the plates 43 and 44, respectively.
a is provided, and the amount of forward movement is regulated by hitting a stopper 92 provided on the case 20 (see FIG. 4).

One of the sliding plates 42 (right side in FIG. 8) has a plate 43 with the other end having a plate 4
The spring support arm 56 that engages with the hole 69 of No. 4 and the spring locking arm 55 that projects toward the other plate 44 are provided.
Joint spring 57 mounted on the spring support arm 56
One end 57a of the above contacts the pushing piece 48, and the other end 57b is locked to the spring locking arm 55 (see FIGS. 1 and 8).

A hole 58 is provided at the tip of each of the plates 43 and 44, and a long guide hole 59 that is long in the vertical direction is provided behind the hole 58.
Both ends of a connecting pin 61 whose center portion is loosely fitted in the drive elongated hole 50 are fitted into the hole 60 provided at the rear end portion. The support shaft 6 is formed in the holes 58 at the tips of the plates 43 and 44.
Both ends of 2 are fitted, and the support shaft 62 is inserted into the hole 63 provided in the intermediate portion of the sickles 45, 46 (see FIGS. 1 and 8).

A sickle pin 64 is vertically movably inserted into each of the elongated guide holes 59 of the plates 43 and 44.
4 has one end fitted into a hole 65 at the rear end of the sickles 45, 46, and the other end of the sickle pin 64 has retractors 40, 4 respectively.
1 is inserted into the cam grooves 66, 66 '. Sickle 4
Among the five and 46, a locking claw 67 protruding downward is provided at the tip of one (right side in FIG. 8) sickle 45, and a locking claw 67 protruding upward is provided at the tip of the other sickle 46. Is provided.

On the front surface of the locking pawl 67, an inclined surface 67a is formed which is inclined rearward toward the tip of the locking pawl 67,
A small protrusion 68 is formed on the front surface of the locking claw 67. On the inclined surface 67a, the sickles 45 and 46 that are open to each other strike 8
This is an inclined surface that produces a component force for rotating the pair of sickles 45, 46 in the closing direction by the abutting force when hitting the tip of the receiving hole 91 of 9.

The cam groove 66 of the retractor 40 is composed of an unlocking groove portion 66a which is parallel to the longitudinal direction of the retractor 40 and a locking groove portion 66b which is bent upward from the tip of the unlocking groove portion 66a and further extends in the longitudinal direction of the retractor 40. Composed. The cam groove 66 'of the retractor 41 is
Unlocking groove 66a parallel to the longitudinal direction of the
And a locking groove portion 66b 'extending downward in the longitudinal direction of the retractor 41 (see FIGS. 1 and 8). Therefore, the two sickle pins 64 have the cam grooves 6
When the sickles 45 and 46 move from the unlocking groove portion 66a of No. 6 to the locking groove portions 66b and 66b ', the sickles 45 and 46 rotate in the directions in which the locking claws 67 open each other.

At the rear end of the retractor 40, there is provided a connecting arm 70 which projects toward the other retractor 41 and whose tip engages with the other retractor 41.
A spring 72 is inserted between the spring support protrusion 71 and the connecting arm 70 provided on the. A guide groove 73 that is perpendicular to the longitudinal direction of the retractor 41 (moving direction of the retractor 41) is provided at the rear end portion of the retractor 41, and the pin 36 of the cam 32 is inserted into the guide groove 73.

Accordingly, the retractors 40 and 41 are integrally biased rearward to push the pin 36 in the guide groove 73 rearward, so that the cam 32 causes the unlocking angle at which the pin 36 is raised and the downward movement. It is urged to the locked position. Retractor 41
Since the guide groove 73 of No. 3 is pressed against the pin 36 by the spring 72, the guide groove 73 is not formed in the groove shape,
You may form in a notch shape leaving only the surface pressed on 6.

The sliding door D is provided with a through hole 75 intersecting with the lock accommodating hole 74, a hole 77 is provided at the center of an inner escutcheon 76 closing the inside of the through hole 75, and a thumb turn 78 is provided in the hole 77. It is rotatably attached (Fig. 2,
See FIG. 8). The thumb turn 78 is provided with a handle 79 for manual operation and a square hole 80 into which one end of the operation shaft 39 is inserted.

A hole 82 is provided in the center of an outer escutcheon 81 that closes the outside of the through hole 75, and an emergency plug 83 having a front operating groove 84 is rotatably provided in the hole 82. It is mounted (see FIGS. 2 and 8). The outer peripheral surface of the emergency plug 83 has a non-circular shape in which a part of the circular shape is cut out.
A color plate 86 having 5 is mounted on the non-circular outer peripheral surface of the emergency plug 83 between the outer escutcheon 81 and the cover 23.

The color plate 86 is coated on its surface facing the outer escutcheon 81 with a color-coded display of the locking angle and the unlocking angle.
Is provided with an inspection window 87 through which the color-coded display is seen. In this embodiment, a square hole 88 (see FIG. 2) into which one end of the operating shaft 39 is inserted is provided on the rear surface of the emergency plug 83, but the emergency plug 83 and the operating shaft 39 are integrated. May be

Two shafts 93 are erected on the inner surface of the outer escutcheon 81, and screw holes 94 are provided on the end surface of the shaft 93.
There are two holes 9 on the inner escutcheon 81.
The screw 96 inserted in 5 is screwed (see FIGS. 7 and 8). The strike 89 attached to the pillar P on the frame side with which the end surface of the sliding door abuts has a space 90 inside, and the surface of the strike 89 has a receiving hole 91 communicating with the space 90.
Are provided (see FIG. 1).

Next, the operation of the door lock constructed as described above will be described in the order of the unlocked state, the locked operation, and the locked state with reference to FIGS. 1 and 3 to 6. The unlocked door lock is
As shown in FIG. 1, the cam 32 rotates clockwise to move the arm 3
5 is at an unlocking angle where it abuts the rear end surface of the housing chamber 24 of the case 20, and the joint plate 47 whose rear end is pivotally attached to the drive shaft 37 of the cam 32 is retracted, so that the joint plate 47 has a driving long hole. The sliding plate 42 in which the connecting pin 61 is pulled rearward by 50 is also in the retracted position. Retractor 4
0 and 41 are also in the retracted position because the connecting arm 70 is pushed by the spring 72.

Two plates 43 of the sliding plate 42,
Of the two sickle pins 64 inserted into the long guide holes 59 of 44, the end of one sickle pin 64 is in the unlocking groove 66a of the cam groove 66 of the retractor 40, and the other sickle pin 64. Since the end portion of the sickle is in the unlocking groove portion 66a of the cam groove 66 'of the retractor 41, the pair of sickles 45 and 46 are in a closed state overlapping each other, and the tips of the sickles 45 and 46 are in the sickle retracting hole 29. Is almost completely immersed (see Fig. 1).

Protrusion 68 of a pair of sickles 45, 46 in the closed state
Overlaps with the center position of the door lock, so this projection 6
The position where 8 hits the column on the frame side shows the position where the strike 89 is attached, which has the advantage of facilitating centering work for the attachment position. Since the color plate 86 is at the unlocking angle together with the cam 32, the color of the unlocking of the color plate 86 can be seen through the inspection window 87, and the person outside the room can know that it is in the unlocked state.

When the manual operation handle 79 of the thumb turn 78 is rotated in the locking direction from the indoor side with the sliding door D closed, the cam 32 rotates counterclockwise together with the operation shaft 39 and the pin 36 moves downward. Drive shaft 3 while rotating toward
7 starts to rotate forward. By the forward rotation of the drive shaft 37, the joint plate 47 moves forward, and the joint spring 57 whose one end 57a is pushed by the pushing piece 48 pushes the sliding plate 42 forward while acting as a cushioning material.

When the cam 32 rotates counterclockwise by 58 degrees, the tip of the sliding plate 42 moves forward until it comes in contact with the stopper 92 inside the case 20, and the retractor 4 is moved.
Although 0 and 41 also move forward a little, since the sickle pin 64 is still in the unlocking groove portion 66a, the pair of sickles 45 and 46 move forward in the closed state overlapping with each other, and the receiving hole 91 of the strike 89.
Into the space 90 (see FIG. 3).

When the cam 32 further rotates 32 degrees to reach the lock angle, the sliding plate 42 which is in contact with the stopper 92.
Does not move any further, but the pin 36 pivots to the position shown in FIG. 4, so that the retractor 41 is pulled back. When the retractor 41 retracts, the sickle pin 64 moves over the bending point of the cam groove 66 and moves to the locking groove portion 66b, so that the pair of sickles 45 and 46 open and engage with the strike 89 (see FIG. 4). When the cam 32 reaches the lock angle, the color of the lock of the color plate 86 can be seen through the inspection window 87, and it can be known that the lock is being performed.

The door end lock of the present invention can be locked by locking the sliding door D in the opened state and closing the sliding door D. As shown in FIG. 5, when the cam 32 is set at the locking angle and the sickles 45 and 46 are opened, the sliding door D is closed.
Inclined surface 6 provided on the front surface of the locking claw 67 of the sickles 45 and 46
7a contacts the front surface of the receiving hole 91 of the strike 89 (FIG. 5).
reference).

When the sliding door D is further closed, the strike 89
The sickles 45, 46 pushed by are retracted, both sickle pins 64 move from the locking groove portions 66b, 66b 'to the unlocking groove portion 66a, and the sickles 45, 46 which receive the force in the closing direction are closed to receive the receiving holes 91. The sickles 45 and 46 project again because they can pass through the inside, and after entering the space 90, the sickles 45 and 46 expand and are locked.

When the sickles 45 and 46 temporarily retract to close, the sliding plate 42 that engages with the sickle pin 64.
Also retracts by the dimension d, and the cam 32 also pivots slightly in the unlocking direction (see FIG. 6), but when the sickles 45, 46 can pass through the receiving hole 91, they are locked by the retractors 40, 41. Since it is biased by the angle, it returns to the locking angle again,
The sliding plate 42 also returns to the original forward position (see FIG. 4).

[0038]

Since the present invention is constructed as described above, it has the following effects. (1) Since the retractor having the sickle, the plate for moving the sickle forward and backward, and the cam groove for opening and closing the sickle is compactly housed in the small housing chamber, the case can be formed with a small diameter.
Therefore, with the advantage of reducing the lock accommodation hole provided in the sliding door,
The advantage is that it is easy to install. (2) Since the pair of sickles having the locking claws are inserted into the strike receiving holes and then opened and closed, the strike receiving holes can be made small. Therefore, there is an advantage that the entire strike becomes small, the recess for mounting the strike provided on the column on the frame side can be made small, and the strike can be easily attached.

(3) In addition to the function of opening the pair of sickles inserted in the strike while the cam is rotated in the locking direction, the retractor also has a function of absorbing rattling after locking, and a cam locking angle. Since it has a click function that stabilizes the unlocking angle,
There is an advantage that the locking and unlocking operations become smooth and reliable. (4) When the locking claw is provided with an inclined surface, it is convenient because the locking operation can be performed before closing the sliding door. (5) If the color plate that rotates together with the cam is locked and unlocked by different colors, and an inspection window is provided on the outer escutcheon, the locked and unlocked state can be easily viewed.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing the relationship between a door lock in an unlocked state and a strike.

FIG. 2 is a cross-sectional view showing an unlocked state of a door lock attached to a sliding door.

FIG. 3 is a vertical cross-sectional view showing a state in which the door lock is being locked.

FIG. 4 is a vertical cross-sectional view showing a locked state of a door end lock.

FIG. 5 is a vertical cross-sectional view of a door end lock showing an initial state in which a sliding door is closed after a locking operation.

6 is a vertical cross-sectional view of the door lock showing a state in which the sliding door is further closed from the state of FIG.

7 is a sectional view taken along line XX of FIG.

FIG. 8 is an exploded perspective view of a door lock.

FIG. 9 is a front view of a conventional door lock seen from an end surface of a sliding door.

FIG. 10 is an explanatory diagram illustrating the main points of a conventional door lock.

[Explanation of symbols]

 D Sliding door 20 Case 24 Storage chamber 28 Front 29 Sickle in / out hole 31 Cam insertion hole 32 Cam 36 pin 37 Drive shaft 39 Operation shaft 40, 41 Retractor 42 Sliding plate 42, 43 Plate 45, 46 Sickle 47 Joint plate 48 Pushing motion One side 50 Drive long hole 57 Joint spring 59 Guide long hole 61 Connecting pin 62 Support shaft 64 Sickle pin 66 Cam groove 66a Unlocking groove part 66b, 66b 'Locking groove part 67 Locking claw 67a Sloping surface 72 Spring 73 Guide groove 81 Outside escutcheon 86 Color plate 87 Inspection window 89 Strike

Claims (4)

[Claims] 1. An elongated accommodation chamber is formed in the front-rear direction, a front having a sickle retracting hole is provided at a front end of the accommodation chamber, a cam insertion hole intersecting with the accommodation chamber is provided, and a front end surface of a sliding door is provided. A case provided inside the attachment hole, a cam having a drive shaft that is rotatably inserted into the cam insertion hole, and that moves in the front direction when being rotated to a locking angle, and the drive shaft. The front end portion of the plate is connected to a joint plate that is pivotally mounted and has a driving long hole and a pushing piece, and a pair of plates that have a long hole for guiding in which a sickle pin is loosely fitted and that can move back and forth in the accommodation chamber. A support shaft, a connecting pin loosely fitted in the drive long hole, a sliding plate provided with a joint spring for contacting the pushing piece, an intermediate portion pivotally attached to the support shaft, and tips in opposite directions to each other. It has a locking claw protruding to the The front end of the cam groove is composed of a pair of sickles pivotally attached to one end of the sickle pin, and a pair of retractors that have cam grooves into which the other ends of the both sickle pins are inserted and are connected to each other. The door locks are characterized in that a locking groove portion is provided in the portion to rotate and guide the sickles in the protruding direction of the locking claws. 2. The front surface of the locking claw is provided with an inclined surface which produces a component force for rotating the pair of sickles in the closing direction when hitting the tip of the strike receiving hole. Door end lock according to 1. 3. The retractor is provided so as to be movable back and forth in the accommodating chamber, a spring for urging the cam toward the cam is provided, and the retractor is provided with a guide groove substantially perpendicular to the moving direction, and the cam is provided with the guide groove. The door end lock according to claim 1 or 2, wherein a click mechanism for urging the cam to a locking angle and an unlocking angle is configured by providing a click pin to be inserted into the guide groove. 4. A color plate that color-codes a locking angle and an unlocking angle is fixed to an operation shaft for rotating the cam, and the locking and unlocking angle of the cam is fixed to an outer escutcheon of the sliding door. The door lock of claim 1, 2 or 3, further comprising an inspection window through which a color-coded display area for locking and unlocking the color plate is seen.