JPH063104Y2 - Door lock - Google Patents

Description

[Detailed Description of the Invention] Purpose of the Invention [Industrial field of application] The present invention makes it possible to open and close the door by operating the operating handle, that is, the knob or lever when the lock is released, and retracting the latch protruding by the spring. Further, the present invention relates to an improvement of a door lock in which the operation handle portion is locked from being rotated when locked and the latch is kept protruding.

[Conventional technology]

Several door locks as described above have been proposed in the past. That is, a) the invention of the same applicant as the present case, in which an operating shaft with a knob portion rotatably provided on the indoor knob side and a display with a display plate rotatably inserted through the knob shaft of the outdoor knob shaft. The shaft for operation is connected with a pivotable operating bar in a square rod that passes through the square hole of the latch, and the locking plate is fixed to the mounting seat frame of one of the knobs, and the central hole is formed. , The knob shaft on that side is rotatably inserted, and a locking recess is formed on the inner edge of the hole. On the other hand, the knob shaft is provided with an inward hole corresponding to the recess, and the through hole is formed. A cam for pushing the outer peripheral surface of the display shaft therein, which houses a locking ball capable of engaging with the recess, and for retracting the ball into the through hole at a position where the display shaft receives the ball when unlocked. With a concave portion (Jitsuko Sho 57-43000)
No.).

b) By rotating the knob, the locking rod (corresponding to the actuating bar (10) of the present invention) is also rotated to rotate the lock cam. Move the lock piece inside the shaft (4) to the side of the locking rod against the spring, and engage the protrusion of the lock piece with the drop groove (corresponding to the locking recess (17)) of the seat. And locking the rotation of the outdoor knob (see, for example, Japanese Utility Model Publication No. 46-13824).

c) Inside the locking piece (corresponding to the locking pin (16)) engaged in the spindle (corresponding to the operating shaft (4) of the present invention),
Form a nearly half-moon shaped cam hole (corresponding to the concave groove (19)),
A connecting rod (corresponding to the operating bar (10)) that is rotated by a knob is inserted into the cam hole, and the locking piece is projected in the radial direction by the cam action when the connecting rod is rotated by the knob. The tip of the spindle and the fixing plate (the locking plate (18)
(Corresponding to the lock recess (17)) to lock the rotation of the outdoor knob (see, for example, Japanese Utility Model Publication No. 41-12076), and the like. .

[Problems to be solved by the device]

By the way, in the case of releasing the lock in the above a), the display shaft is rotated by the knob, and the cam recess of the shaft is moved to the upper side so that the lock ball in the lock recess is moved by its own weight. It is lowered to the recess for use and released from the lock recess.
However, this has the problem that the locking ball cannot descend to the cam recess by its own weight when unlocking unless the locking recess of the locking plate is correctly positioned at the upper position when mounting the lock. there were.

When the lock is released in b) above, the knob is rotated to rotate the lock cam, and the lock piece is forcibly retracted by the force of the spring to disengage the protrusion from the drop groove of the seat. ing. However, this has an unstable surface in that sometimes the lock piece cannot be smoothly retracted due to a malfunction of the spring such as the spring being distorted or being caught in an inclined shape, and the lock state remains.

Further, when the lock is released in the above c), the connecting rod inserted through the cam hole of the locking piece is rotated by the rotation of the knob, and the locking piece is forcibly moved backward by the cam action. .
However, since this operates the locking piece with the connecting rod,
The cam hole needs to have a size such that the connecting rod can be rotated inside the cam hole, and the side portion of the cam hole needs to have a sufficient width in view of strength as a locking piece that moves by a cam action.

Therefore, the width of the locking piece is considerably large,
For example, a lateral width of about three times the dimension in the longitudinal direction of the cross-sectional shape of the connecting rod is required, and the inner diameter of the spindle in which the locking piece is installed cannot be reduced.

Therefore, in order to reduce the weight, noise, and cost, for example, as shown in FIG. 1 of the present application, even if the material of the spindle is made of plastic and the wall thickness is increased for strength, the inner diameter is reduced. As a matter of fact, it was not possible to reduce the weight, muffling and cost reduction by using plastic.

The present invention is intended to solve the problems of the conventional door lock. In other words, the object of the present invention is to have a simple structure, but the unlocking operation can be performed smoothly regardless of the vertical direction when the lock is attached, and there is no instability of operation as when using a spring, and the lock mechanism is compact. The purpose of the present invention is to provide a door lock that can be made lighter, has a lower noise, and has a lower cost by making the operation shaft made of plastic.

Configuration of the Invention [Means for Solving the Problems] The door lock of the present invention is configured such that the operation handle shafts (5), (6) and the operation shafts integrated with the operation handle parts (1), (2) are provided inside and outside the room. (3) (4) is rotatably mounted and both operation shafts (3)
(4) are connected to each other by a square rod (7), the square hole (9) of the latch (8) is mounted on the square rod (7), and the indoor end is provided inside the square rod (7). Insert the operating bar (10) with the knob (11), and use the operating bar (10) to operate the operation shaft on the outdoor side.
In the door lock in which the actuating shaft (13) in (4) is rotatable and the lock mechanism capable of locking the rotation of the operation shaft (4) outside the room is provided, each of the above-mentioned operating shafts (3) ( 4) is made of plastic, and the operating bar (1) is provided between the operating bar (10) and the operating shaft (13).
(0) is provided with a joint part (12) at the outdoor side end and is connected by a crank shaft (14) provided at a position eccentric from the axial center, and the lock mechanism is installed laterally on the outdoor side operation shaft (4). The lock pin (16) having an L-shaped cross section is provided in the immersion hole (15),
Locking recess of the locking plate (18) inside the outdoor seat frame (2)
The crank shaft (14) is slidable inward (17) and is engaged with the groove (19) formed in the locking pin (16).

In the above-mentioned configuration, the operation grip portions (5) and (6) provided on the indoor and outer mounting seat frames (1) and (2) mean, for example, knobs and levers.

The operation shaft (13) inside the outdoor operation shaft (4) is a simple cylinder lock that can be rotated with the construction key to lock and unlock from the outdoor side during construction as shown in the figure, for example. It is like that. Not limited to this, for example, it may be display means for displaying the locked state or the unlocked state on the outside of the room.

The positional relationship between the crankshaft (14) and the concave groove (19) of the locking pin (16) may be as shown in FIG.

The latch (8) is a spring (not shown) like the conventional one.
Is always in a protruding state and can be engaged with a locking fitting (not shown) of the door frame.

In the figure, (20) is the section roller of the working shaft (13), (2
1) (22) is a coiled spring that restores the rotation of each operation shaft (3) (4), (23) is a disk tumbler when the operating shaft (13) is a simple cylinder lock, and w is a locking pin Each width of (16) is shown.

[Action]

As described above, the door lock of the present invention has a crankshaft (1) that is eccentrically provided between the operating bar (10) and the outdoor-side operating shaft (13).
4) and use the lock pin (1
6) is formed to have an L-shaped cross section, and a concave groove (19) is formed in a part thereof.
The crankshaft (14) is engaged with. Therefore, i) First, in the door lock of the present invention, the operation shafts (3) and (4) can be made of plastic in order to reduce weight, reduce noise, and reduce costs.

The conventional locking mechanism of this type of lock has a cam hole formed in a plate-like locking piece (corresponding to the locking pin (16) of the present invention), and a connecting rod (corresponding to the operating bar (10) corresponding thereto). ) Was inserted, and the connecting rod was rotated to forcibly move the locking piece by the cam action.

Therefore, in terms of strength, the lateral width of the locking piece needs to have a sufficient thickness at the side portion of the cam hole through which the connecting rod is inserted. For example, the lateral width of the cross-sectional shape of the connecting rod is about three times the longitudinal dimension. It was necessary, and the inner diameter of the spindle (corresponding to the same operation shaft (4)) in which the locking piece was installed could not be reduced.

In contrast, the lock pin (16) for the door lock of the present invention
Performs its operation with the crankshaft (14), and the operating bar (10)
The width w (see FIGS. 2 to 5) is approximately the same as the longitudinal dimension of the cross-sectional shape of the actuating bar (10) because it is not engaged with each other. It has become. Since the cross-sectional shape is L-shaped, it has sufficient strength.

With this, the outdoor operation shaft in which the lock pin (16) is immersed
The immersion hole (15) in (4) can also be made smaller. Therefore, the operation axis
(4) is made of plastic, and even if the inner diameter becomes small to increase the wall thickness for strength (see FIGS. 1 and 3 to 5), the lock pin (16) has a hole (15) for immersing. Can be formed without any hindrance.

Therefore, by making the operation shafts (3) and (4) on the indoor side and the outdoor side made of plastic, weight reduction, noise reduction, and cost reduction can be achieved.

ii) The operation for locking is almost the same as the conventional one.

The lock pin (16) before locking is pulled by the crankshaft (14) as shown by the two-dot diagonal line in FIG. 1 and in FIG. 3, and the pin insertion hole (15) of the outdoor operation shaft (4) is drawn. It has sunk in and has been removed from the locking recess (17).

If you turn the knob (11) about 90 degrees, the bar for operation will
(10) The crankshaft (14) also rotates about 90 degrees via the joint portion (12), but the crankshaft (14) is eccentric from the shaft center. Therefore, by the rotation of the crankshaft (14), the locking pin (16) engaged in the concave groove (19) is pushed to project in the radial direction as shown by the solid line in FIG. 1 and FIG. , The locking recess (1) of the locking plate (18) whose tip is integrated with the mounting seat frame (2) on the outdoor side
Engage in 7).

With this, the rotation of the outdoor side operation shaft (4) is stopped, the operation handle part (6) on the outdoor side cannot be rotated, and the square tube rod (7) also does not rotate, so it is projected by the spring. The latch (8) remains engaged with the locking metal fitting, that is, the locked state.

iii) The operation of releasing the lock is surely and smoothly performed regardless of the attached state of the door lock.

In the locked state, the locking pin (16) has its tip end engaged with the locking recess (17) as shown by the solid line in FIG. 1 and FIG.

Now turn the knob (11) about 90 degrees in the opposite direction,
Crankshaft (14) through the operating bar (10) / joint (12)
Also turn 90 degrees in the opposite direction. By this rotation of the crankshaft (14), the locking pin (16) is pulled, and is forcibly retracted to the pin insertion hole (15) side of the outdoor operation shaft (4), and the lock pin (16) shown in FIG.
As shown by the dot-dash line and FIG. 3, the pin is retracted into the hole 15 for retracting the pin and the tip end is separated from the recessed portion 17 for locking.

This frees the outdoor operation shaft (4) from turning,
When the operating handles (5) (6) inside or outside the room are turned, the square rod (7) integral with the operating shafts (3) (4) also rotates and the latch (8) resists the spring. Then, it retreats and is unlocked from the locking fitting of the door frame.

As in the illustrated embodiment, when the operating shaft (13) is a simple cylinder lock that can be operated with a construction key, the operating shaft (13) is rotated from the outdoor side using the construction key, By rotating the crank shaft (14), the locking pin (16) can be projected and inserted, and the same locking or unlocking as described above can be performed.

EFFECTS OF THE INVENTION As is apparent from the above, the door lock according to the present invention has a simple structure, but the unlocking operation can be performed regardless of the vertical direction when the lock is attached, and the operation is unstable like when using a spring. The locking shaft can be made compact and the operating shaft can be made of a plastic lock for weight reduction, noise reduction, and cost reduction.

That is, in the conventional lock of this type, the lock recess must be set to the upper position when the lock is attached, which cannot be unlocked when the lock is released or the tock is forcibly released by the spring force. Occasionally the lock could not be released smoothly due to malfunction. Moreover, since the locking piece of the lock mechanism has a large width, the spindle (operating shaft) into which the locking piece is to be recessed needs to have a large inner diameter, which cannot be made of plastic because of its small strength.

On the other hand, in the door lock according to the present invention, the operating bar and the operating shaft are connected by an eccentrically provided crankshaft, and the locking pin of the locking mechanism is formed in an L-shaped cross section. The crankshaft is engaged with the formed groove.

Therefore, the door lock according to the present invention can be simply configured including the lock mechanism, and since the lock pin is forcibly moved by the crankshaft, it is stable regardless of the vertical direction when the lock is attached. Lock / unlock operation.

Moreover, the operation of the locking pin is performed by the crankshaft, and it is only necessary to form the concave groove with which the crankshaft can engage. Since it does not have a cam hole for engaging the operating bar inside unlike the conventional case, the width of the lock pin can be reduced while having sufficient strength. Therefore, both the indoor and outside operation shafts are made of plastic to reduce weight and reduce noise.
Cost reduction can be achieved.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is an overall cross-sectional plan view of the door lock of the present invention, FIG. 2 is a perspective view of essential parts, and FIG. FIG. 4 is a vertical cross-sectional side view of FIG. 1A when locked, and FIG. 5 is a vertical cross-sectional side view of FIG. 1A-A for another embodiment. Drawing symbol (1) -Mounting seat frame, (2) -Mounting seat frame (3) -Operating shaft, (4) -Operating shaft (5) -Operating handle, (6) -Operating handle (7) -Square cylinder rod, (8) -Latch (9) -Square hole, (10) -Operating bar (11) -Knob, (12) -Joint part (13) -Operating shaft, (14) -Crank shaft ( 15) -Immersion hole, (16) -Locking pin (17) -Locking recess, (18) -Locking plate (19) -Recessed groove, (20) -Section roller (21) -Spring, (22) ) -Spring (23) -Disc tumbler W-Width

Claims (1)

[Scope of utility model registration request] 1. The operation shafts (3) and (4) integrated with the operation grip portions (5) and (6) are rotatably mounted on the mounting seat frames (1) and (2) inside and outside the room. ,
The operating shafts (3) and (4) are connected by a square tube rod (7), and the square tube rod (7) is fitted with the square hole (9) of the latch (8). ), The operation bar (10) having a knob (11) at the indoor side end is inserted, and the operation bar on the outdoor side is inserted by the operation bar (10).
In the door lock in which the actuating shaft (13) in (4) is rotatable and the lock mechanism capable of locking the rotation of the operation shaft (4) outside the room is provided, each of the above-mentioned operating shafts (3) ( 4) is made of plastic, and the operating bar (1) is provided between the operating bar (10) and the operating shaft (13).
(0) is provided with a joint part (12) at the outdoor side end and is connected by a crank shaft (14) provided at a position eccentric from the axial center, and the lock mechanism is installed laterally on the outdoor side operation shaft (4). The locking pin (16) having an L-shaped cross section is provided in the immersion hole (15)
Locking recess of the locking plate (18) inside the outdoor seat frame (2)
(17) A door lock characterized by being slidable inward and engaging the crankshaft (14) in a groove (19) formed in the locking pin (16). .