JPH0941741A - Door lock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the structure which regulates the retraction of a latch bolt and further reduce the size. SOLUTION: A rotary plate 24, which is rotated integrally with a square- shaped core shaft 13 and forms a fit-in recessed area 24b on the outer periphery, is provided on a square-shaped core shaft 13. An arc-shaped groove 21e is formed on a thumb turn 21 where the arc-shaped groove is designed to increase gradually its distance from the rotary center along the rotary direction between 90 of rotary angles. A stopper 23 is provided between the thumb turn 21 and the rotary plate 24 where the stopper 23 moves forward and backward freely between both members, A projection part 22c is formed so that it may fit in the fit-in recessed area 24b of the rotary plate 24 when the rotary plate 24 advances in the direction at which the rotary plate is provided while a guide pin 27 is provided, which is inserted into the arc-shaped groove 21e of the thumb turn 21 and guides alone this arc-shaped groove 21e.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thumb-turn for restricting the rotation of the square core shaft while the latch bolt is projected and retracted via the square core shaft by the rotation operation of a rotary operation member such as a lever handle. The present invention relates to a door lock having.

[0002]

2. Description of the Related Art Lever-type door locks are often used for doors in Western-style rooms such as houses and condominiums and private rooms such as bathrooms because of their good operability.

In the above-mentioned lever-type door lock, as shown in FIG. 14, by gripping and rotating the lever handles 60, 60, the latch bolt 61 is retracted and the door is opened and closed. . Then, in this type of lever-type door lock, as shown in FIG. 15, the thumb turn 7 that locks the opening and closing of the door by restricting the appearance of the latch bolt 61.
0 is often set.

A conventional lock mechanism for a lever lock having a thumb turn 70 is disclosed in, for example, Japanese Utility Model Laid-Open No. 4-21687. In the lock mechanism disclosed in this publication, when the thumb turn 70 is in the unlocked state, as shown in FIG. 16, the rotation restricting member 63 that rotates integrally with the angular core shaft 62 as the lever handle 60 rotates.
Then, the engagement with the stopper 72 that moves up and down via the cam 71 with the rotation of the thumb turn 70 is released.

On the other hand, when the thumb turn 70 is in the locked state, as shown in FIG. 17, the stopper 72 moves downward with the rotation of the thumb turn 70 and the rotation of the cam 71 accompanying this rotation. The engaging portion 72a at the lower end of the stopper 72 contacts the contact portion 63a of the rotation restricting member 63.

As a result, the rotation of the rotation restricting member 63 is restricted, so that even if the lever handle 60 is rotated, the square shaft 62 cannot be rotated, and the latch bolt 61 is held in the advanced position. Then, the lever lock is locked.

[0007]

However, in the above conventional door lock, in order to restrict the rotation of the lever handle 60, the rotation restricting member 63, the cam 71, and the stopper 72.
Therefore, there is a problem that the structure is complicated and it is difficult to reduce the size.

The present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to provide a door lock which simplifies the structure for restricting the protruding and retracting of the latch bolt and which can downsize the case. The purpose is to do.

[0009]

In order to solve the above-mentioned problems, the door lock according to the present invention allows the latch bolt to be retracted and retracted via the square core shaft by rotating the rotating operation member such as a lever handle. In a door lock having a thumb turn for restricting rotation of the square-core shaft, the square-core shaft rotates integrally with the square-core shaft, and a fitting portion such as a notch recess is formed on the outer circumference. An arc-shaped guide portion such as an arc-shaped groove having a gradually increasing distance from the center of rotation along the rotation direction over the rotation angle of 90 degrees is formed on the thumb turn. An advancing / retreating plate that freely moves back and forth between the thumb turn and the rotating plate is provided, and when the advancing / retreating plate moves in the direction in which the rotating plate is installed, the rotating plate is fitted. For example, protruding when fitted to the joint Together with the fitting portion is formed of an equal, is characterized in that pins guided along the arcuate guide portion is inserted into the arc-shaped guide portion of the thumb is provided.

According to the above construction, in the unlocked state of the thumb turn, that is, in the state in which the latch bolt is freely retracted and retracted via the angular core shaft by the turning operation of the lever handle, the pin provided on the advancing / retreating plate is It is inserted into a position of the shortest distance from the center of rotation of the thumb turn in an arc guide portion such as an arc groove of the thumb turn. At this time, the advancing / retreating plate exists at the retracted position farthest from the rotary plate that rotates integrally with the square core shaft.

Next, in order to change the state from the above state to the locked state of the thumb turn, that is, the state in which the latch bolt is freely retracted and retracted via the angular core shaft by the turning operation of the lever handle, the thumb turn is set to 90. Rotate once. This causes the arcuate groove of the thumb turn to rotate. At this time,
The arc-shaped guide part such as the arc-shaped groove has a rotation angle of 90 degrees for the thumb turn.
Since it is formed so that the distance from the center of rotation gradually increases along the direction of rotation over a period of time, the pin that is inserted into the circular groove along with the rotational movement of the circular groove has a circular shape. It is guided along the arcuate groove, which gradually increases the distance between the rotation center of the thumb turn and the pin,
The advancing / retreating plate is moved forward in the direction in which the rotary plate is provided.

A fitting portion such as a cutout recess is formed on the outer periphery of the rotary plate, and the forward / backward plate is fitted with the rotary plate when it moves forward in the direction in which the rotary plate is provided. Since a fitted portion such as a protruding portion that fits into the mating portion is formed, when the thumb turn is rotated 90 degrees, the pin provided in the arc groove is inserted into the thumb turn in the thumb groove. Is guided to a position where the distance from the center of rotation of the rotary plate is the longest, and thereby the fitted portion such as the projecting portion of the advancing / retreating plate is fitted to the fitting portion of the rotary plate that rotates integrally with the square core shaft. . As a result, the rotation of the rotary plate is blocked, and the rotation of the square core shaft is also blocked.

Therefore, even if the lever handle is to be rotated, it cannot be rotated, the latch bolt is fixed in the advanced state, and the lever is locked.

As described above, according to the present invention, as a structure for restricting the protruding and retracting of the latch bolt, the thumb-turn has an arc shape in which the distance from the center of rotation gradually increases along the rotation direction over the rotation angle of 90 degrees. Forming a guide,
The advancing / retreating plate is moved forward / backward by the pin guided by the arcuate guide portion to be engaged with the rotating plate to regulate the rotation of the square core shaft.

Therefore, it is possible to simplify the structure for restraining the latch bolt from protruding and retracting. Further, the difference between the maximum value and the minimum value of the distance from the rotation center of the thumb turn in the arc-shaped guide portion formed on the thumb turn may be, for example, about 6 mm, and the advancing / retreating plate and the rotating plate are also formed by small plates. Therefore, the door lock can be downsized.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIGS.

The door lock 1 of the present embodiment is attached to a door in a private room such as a Western-style room or a bathroom in a house or a condominium. As shown in FIGS. 1 and 2, the door lock 1 has an indoor door lock 2 attached to the indoor surface of the door and an outdoor door lock 3 attached to the outdoor surface of the door. There is. The indoor side door lock 2 and the outdoor side door lock 3 are opposed to each other across both sides of the door, and the door is fixed between the indoor side door lock 2 and the outdoor side door lock 3 in a closed state. A latch member 4 is provided.

The latch member 4 includes a lever handle 5 as a member for rotating the indoor door lock 2 and an outdoor door lock 3.
There is provided a latch bolt 7 that appears and disappears with a lever handle 6 as a rotation operating member. In this embodiment, the lever handles 5 and 6 are used as the rotating operation member, but the present invention is not limited to this, and for example, a knob can be used.

In the closed state, the above-mentioned latch bolt 7 is inserted into a latch hole (not shown) formed in the door frame by advancing, and unless the lever handle 5 or lever handle 6 is rotated, the door is closed. Is not open.

As shown in FIG. 3, the outdoor door lock 3 for retracting the latch bolt 7 has an outdoor seat 8 which abuts against the door. As shown in FIG. 4, the outdoor-side reinforcement long seat 9 fitted to the outdoor-side long seat 8 is provided.

Through the through hole 10
10 are bored, and these through holes 10 and 10 have
As shown in FIG. 1, screws 11 having a plus-shaped groove on the head are inserted. Then, these screws 11, 11 are screwed into the screw engaging portion 22 of the interior door lock 2.
The indoor side door lock 2 and the outdoor side door lock 3 are fastened to each other by being screwed into the c · 22c.

Further, on the outer surface of the outdoor door lock 3, as shown in FIG.
As shown in FIG. 3, a lever handle 6 that is gripped when the door is opened and closed, and an emergency turn 12 that is connected to a thumb turn 21 described later and that unlocks the locked state of the door by the thumb turn 21 from the outside are provided.

As shown in FIG. 2, the lever handle 6 is provided with a quadrangular prismatic square core shaft 13 at the center of rotation, and the square core shaft 13 is penetrated by the latch member 4. . Then, as shown in FIG.
When the lever handle 6 is returned in the B direction, the tip of the latch bolt 7 is moved into and out of the latch member 4 by rotating the lever bolt 6 in the B direction. Is moved to the latch hole of the door frame to close the door.

On the other hand, as shown in FIG. 2, the indoor side door lock 2 attached to the indoor side has an indoor side long seat 20 that abuts on the door like the outdoor side door lock 3 described above. As shown in FIG. 5, a lever handle 5 that is gripped when the door is opened and closed, and a thumb turn 21 that restricts the latch bolt 7 from protruding and retracting and locks it are provided on the surface of the indoor long seat 20. There is.

The lever handle 5 is provided with a rectangular columnar shaft-shaped shaft fitting hole (not shown) at the center of rotation, and the square-shaft shaft 13 shown in FIG. By being fitted, the lever handle 5 interlocks with the lever handle 6 of the outdoor door lock 3 and rotates in the direction of arrow CD shown in FIG.

In the interior of the indoor long chair 20 described above,
As shown in FIGS. 6 and 7, in addition to the thumb turn 21,
A back plate 22, a stopper 23 as an advancing / retreating plate, a rotating plate 24 as a rotating plate, a spring 25, a ball 26 and a pin 27 are provided. The indoor side seat 20 and the thumb turn 21 are made of plastic, but the back plate 22, the stopper 23, the rotating plate 24, the spring 25, the ball 26 and the pin 27 are made of metal such as stainless steel.

As shown in FIG. 8, a thumb turn hole 20a and a square core shaft hole 20b are bored in the indoor long seat 20 and an arc-shaped thumb turn rotation guide rib 20c and an arc-shaped rotation are provided. A plate guide rib 20d and other spring accommodating portions 20e and the like are formed.

The back plate 22 covers the indoor long seat 20 from the back as a cover. As shown in FIG. 9, the back plate 22 is provided with a thumb screw hole 22a and a square core shaft hole 22b in addition to the above-described screw threaded portions 22c and 22c, and at the same time, the indoor side seat 20 is provided. Screw holes 22d.2 for inserting the screws in the screw mounting portions 20f, 20f (see FIG. 8) in FIG.
2d is drilled.

The above stopper 23 is shown in FIG.
As shown in (b), the upper and lower edge portions are formed in parallel, and are slid while being guided by the peripheral edge bent portions 22e, 22e bent at the upper and lower ends of the back plate 22 shown in FIG. It is provided to be free. Therefore, in the door lock 1, the sliding of the peripheral edge bent portions 22e, 22e of the back plate 22 made of the metal plate and the stopper 23 made of the metal plate causes a load to be exerted on the metal plate in the portion where the force acts. This is done.

Further, the stopper 23 is formed such that the left and right ends thereof are recessed, and the right end recessed portion 23a allows the inward projection of the thumb turn 21 while the left end thereof is protruded, as shown in FIG. In the recessed portion 23b, in the central portion between the upper and lower,
It has a protruding portion 23c as a fitted portion protruding leftward. Further, a pin hole 23d is formed at the central position of the stopper 23.

The above rotary plate 24 is shown in FIG.
As shown in (b), it is formed of a substantially circular plate, and a square hole 24a for a square core shaft is formed in the center thereof. A fitting recess 24b is formed at the right end of the rotary plate 24 as a recessed fitting part that can be fitted into the protrusion 23c of the stopper 23.

That is, as shown in FIG. 6, the rotating plate 24 and the stopper 23 are provided in contact with the standing ribs 20f and 20g formed at the same height in the indoor side seat 20. , As shown in FIG. 13, when the stopper 23 moves leftward,
The protrusion 23c of the stopper 23 is fitted in the fitting recess 24b of the rotary plate 24.

The thumb turn 21 is shown in FIG.
As shown in (b), it comprises a grip portion 21a, a disk portion 21b, and a back plate engaging portion 21c. As shown in FIG. 12C, the disk portion 21b is formed to have a substantially circular cross section, and in the upper left portion of FIG. 12C, a curved protrusion 21d that is curved outward in the radial direction is projected. Have

The curved protrusion 21d is formed with an arcuate groove 21e along the curved shape of the curved protrusion 21d. That is, the arcuate groove 21e is formed by the thumb turn 21
Is formed such that the distance from the center of rotation gradually increases along the rotation direction over a rotation angle of 90 degrees. The vertical distance from the vertical midpoint of the arcuate groove 21e to the rotation center of the thumb turn 21 is compared with the horizontal distance from the horizontal mid point of the arcuate groove 21e to the rotation center of the thumb turn 21. For example, it is 6 mm longer.

As shown in FIG. 7, a pin 27 is inserted into the arcuate groove 21e in an upright state.
7 is guided by the arcuate groove 21e. Therefore, the width of the arcuate groove 21e is substantially the same as the width of the pin 27. The pin 27 is also loosely fitted in a pin hole 23d formed in the stopper 23.

On the other hand, the above-mentioned spring 25 and ball 2
As shown in the same figure, 6 is accommodated in the spring accommodating portion 20e of the indoor side long seat 20, and by applying an urging force for pressing the thumb turn 21, the thumb turn 21 can be moved in the horizontal rotation direction or the vertical rotation direction. It is designed to be held in position.

The unlocking / locking operation of the door lock 1 having the above structure will be described.

First, in the unlocked state of the thumb turn 21, that is, in the state in which the latch bolt 7 is freely retracted and retracted via the angular core shaft 13 by the turning operation of the lever handles 5 and 6, as shown in FIG. The pin 27 provided on 23 is provided in the arc-shaped groove 21e of the thumb turn 21,
The thumb turn 21 is inserted at the shortest distance from the center of rotation. At this time, the stopper 23 is the core shaft 1
It exists in the retracted position farthest from the rotary plate 24 that rotates integrally with the rotary plate 3.

Therefore, in this state, the stopper 2
Since 3 is not engaged with the rotary plate 24, the rotary plate 24 that rotates integrally with the angular core shaft 13 can freely rotate by the turning operation of the lever handles 5 and 6.
As a result, the latch bolt 7 can be freely retracted and retracted.

Next, the above state is changed to the locked state of the thumb turn 21, that is, the state in which the latch bolt 7 is prevented from freely retracting and retracting via the square core shaft 13 by the turning operation of the lever handles 5 and 6. To do that, Sam Turn 21
Alternatively, the emergency turn 12 is rotated 90 degrees. As a result, as shown in FIG. 13, the thumb turn 2
The first arcuate groove 21e rotates. At this time, the arcuate groove 2
Since 1e is formed such that the distance from the center of rotation gradually increases along the rotation direction over the rotation angle of 90 degrees of the thumb turn 21, the arc-shaped groove 21e is rotated along with the rotation operation of the arc-shaped groove 21e. Pin 2 inserted in the
7 is guided along the arcuate groove 21e, whereby the distance between the rotation center of the thumb turn 21 and the pin 27 is gradually increased, and the stopper 23 is moved forward in the direction in which the rotation plate 24 is provided.

Here, a fitting recess 24b is formed on the outer periphery of the rotary plate 24, and the stopper 23 is fitted with the rotary plate 24 when the rotary plate 24 moves forward in the direction in which the rotary plate 24 is provided. A protrusion 23c that fits into the mating recess 24b is formed. Therefore, when the thumb turn 21 is rotated by 90 degrees, the pin 27 provided in the arcuate groove 21e in the inserted state is guided to the position in the arc groove 21e where the distance from the rotation center of the thumb turn 21 is the longest, As a result, the protrusion 23c of the stopper 23 is fitted into the fitting recess 24b of the rotary plate 24 that rotates integrally with the square core shaft 13. As a result, the rotation of the rotary plate 24 is blocked, and the rotation of the square core shaft 13 is also blocked.

Therefore, the lever handles 5 and 6 described above are used.
Even if it tries to rotate, it cannot rotate, the latch bolt 7 is locked in the advanced state, and is locked.

Thus, the door lock 1 according to the present embodiment.
Then, as a structure for restricting the protruding and retracting of the latch bolt 7, an arc-shaped groove 21e is formed in the thumb turn 21 in which the distance from the center of rotation gradually increases along the rotation direction over the rotation angle of 90 degrees. The stopper 23 is moved forward and backward by the pin 27 guided by the arcuate groove 21e, and is engaged with the rotary plate 24 to regulate the rotation of the square core shaft 13.

Therefore, it is possible to simplify the structure for restricting the protruding and retracting of the latch bolt 7. Further, the difference between the maximum value and the minimum value of the distance from the rotation center of the thumb turn 21 in the arc-shaped groove 21e formed in the thumb turn 21 may be, for example, about 6 mm.
Since the 3 and the rotary plate 24 can also be formed by a small plate, the door lock 1 can be downsized.

In this embodiment, the rotary plate 24 is provided with a fitting recess 24b as a fitting portion,
The stopper 23 is formed with the protrusion 23c as the fitted portion, but the present invention is not limited to this. For example, the rotation plate 24 may be formed with the protrusion as the fitting portion, and the stopper 23 may be formed as the fitted portion. It is possible to form the fitting recess 24b.

In the embodiment of the present invention, the pin 27 is provided as a separate body from the stopper 23, but the present invention is not limited to this. For example, the pin 27 is fixed to the stopper 23 in a suspended state. However, it may be provided in the arcuate groove 21e in an inserted state.

Further, the arcuate groove 21e serving as an arcuate guide portion in the thumb turn 21 is not limited to the groove when the pin 27 is fixed to the stopper 23 in the hanging state as described above. It is also possible to make a hole.

[0048]

As described above, in the door lock of the present invention, the above-mentioned square core shaft is provided with the rotary plate which rotates integrally with the square core shaft and has the fitting portion formed on the outer periphery thereof. On Samturn,
An arcuate guide portion is formed in which the distance from the center of rotation gradually increases along the rotation direction over the rotation angle of 90 degrees, and the guide portion is freely moved between the thumb turn and the rotary plate. An advancing / retreating plate is provided, and the advancing / retreating plate is provided with a fitted portion that is fitted into a fitting portion of the rotating plate when the advancing / retracting plate moves in the direction in which the rotating plate is provided. The pin is inserted in the arc-shaped guide portion of the thumb turn and is guided along the arc-shaped guide portion.

Thus, as a structure for restricting the protruding and retracting of the latch bolt, an arcuate guide portion is formed on the thumb turn, the distance from the center of rotation gradually increasing along the rotation direction over the rotation angle of 90 degrees, The advancing / retreating plate is moved forward / backward by the pin guided by the arcuate guide portion to be engaged with the rotating plate to regulate the rotation of the square core shaft.

Therefore, it is possible to simplify the structure for restricting the protruding and retracting of the latch bolt. Further, the difference between the maximum value and the minimum value of the distance from the rotation center of the thumb turn in the arc-shaped guide portion formed on the thumb turn may be, for example, about 6 mm, and the advancing / retreating plate and the rotating plate are also formed by small plates. Therefore, the door lock can be downsized.

[Brief description of drawings]

FIG. 1 is an assembled exploded perspective view showing a configuration example of a door lock according to the present invention.

FIG. 2 is a front view showing the structure of the door lock.

FIG. 3 is a right side view showing the structure of the outdoor door lock of the door lock.

FIG. 4 is a cross-sectional view showing a structure of an outdoor door lock of the door lock.

FIG. 5 is a left side view showing the structure of the indoor door lock of the door lock.

FIG. 6 is a cross-sectional view showing the structure of an indoor door lock of the door lock.

FIG. 7 is a right side view showing an unlocked state of the thumb turn in the indoor door lock of the door lock.

FIG. 8 is a right side view showing the structure of the indoor long seat in the indoor door lock of the door lock.

FIG. 9 is a right side view showing the structure of the back plate that covers the indoor long seat in the indoor door lock.

10A and 10B show a structure of a stopper provided on an indoor long seat in the indoor door lock, in which FIG. 10A is a right side view and FIG. 10B is a sectional view.

11A and 11B are views showing a structure of a rotary plate provided on an indoor long seat in the indoor door lock, in which FIG. 11A is a right side view and FIG. 11B is a sectional view.

FIG. 12 is a view showing a structure of a thumb turn provided on an indoor long seat in the indoor door lock, (a) is a plan view, (b) is a front view, and (c) is a right side view.

FIG. 13 is a right side view showing a locked state of the thumb turn in the indoor door lock of the door lock.

FIG. 14 is a perspective view showing a structure of a conventional door lock.

FIG. 15 is a front view showing the structure of the door lock.

FIG. 16 is a right side view showing an unlocked state of the thumb turn in the indoor door lock of the door lock.

FIG. 17 is a right side view showing a locked state of the thumb turn in the indoor door lock of the door lock.

[Explanation of symbols]

 1 Door Lock 2 Indoor Side Door Lock 3 Outdoor Side Door Lock 5.6 Lever Handle (Rotating Operation Member) 7 Latch Bolt 13 Square Core Shaft 12 Emergency Turn 21 Thumb Turn 21e Arc-Shaped Groove (Arc-Shaped Guide) 23 Stopper (Advance / Retract) Plate) 23c Projecting part (fitted part) 24 Rotating plate (rotating plate) 24b Fitting concave part (fitting part) 27 pins

Claims (1)

[Claims] 1. A door lock having a thumb turn for retracting a latch bolt through a square core shaft by rotating a rotary operation member while restricting the rotation of the square core shaft. The shaft is provided with a rotary plate that rotates integrally with this angular core shaft and has a fitting portion formed on the outer periphery. The thumb turn described above has a rotation angle of 90 degrees from the center of rotation along the rotation direction. An arcuate guide portion with a gradually increasing distance is formed, and an advancing / retreating plate that freely moves back and forth between the thumb turn and the rotating plate is provided, and the advancing / retreating plate includes a rotating plate. A fitted portion is formed which is fitted to the fitting portion of the rotary plate when it moves forward in the direction in which it is provided, and is inserted into the arc-shaped guide portion of the thumb turn and is inserted into the arc-shaped guide portion. Provided with pins to be guided along A door lock characterized by that.