JPH08177287A - Door locking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid breakage or the like of the inner parts, when unreasonable forces act on the handle in a door lock device chiefly provided with a lever type handle. SOLUTION: A door lock device is provided with a lever shank 7 connected to a handle side, an outer spindle 15 inserted into the inside so as to be retalively rotatable, a safety pin 16 arranged to straddle between the above two, a safety spring 17 pushing the safety pin 16 to the lever shank 7 side, a rotary spindle 19 set in the inside, a flat spring 20 supported by these parts, and a connection spindle 21 provided in the inside of the rotary spindle 19. The inserting protrusion 20A of the flat spring 20 and the joining pin 22 of the connection spindle 21 side are inserted into the rotary spindle 19 to connect them together. When an unreasonable force acts on the handle, the safety pin 16 is pushed up from the lever shank 7 and the joining pin 22 is removed from the rotary spindle 19.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door lock device suitable for a door provided with a lever type handle. In particular, the present invention relates to a door lock device that can absorb the impact of an excessive force applied to a handle such as a lever and prevent the lever-type door lock device from being damaged.

[0002]

2. Description of the Related Art In a conventional lever type door lock device, a lever type handle is engaged with an internal part of a lock mechanism to interlock with each other. Therefore, if excessive force is applied to the handle, the internal parts are overloaded, which is not preferable. In particular, when the door lock is in the closed state, the internal components of the door lock are easily damaged by a strong twisting force based on the operation of the handle. Further, when the lock state is released due to the damage, there is a problem that the original function of the door lock is lost.

[0003]

SUMMARY OF THE INVENTION The object of the present invention is to solve the above-mentioned problems when the handle is interlocked with internal parts when a force within a proper range is applied to the handle, and when an excessive force is applied to the handle. (EN) Provided is a door lock device having a structure in which a handle can be operated separately from an internal part, thereby preventing damage and unintentional release of the door lock device.

[0004]

Means for Solving the Problems and Effects of the Invention The content of the present invention is as set forth in the claims. Briefly speaking, a handle side shank connected to the handle side and a lock. An overload absorption mechanism is provided in a rotation transmission type with the mechanism. That is, two members including the shank on the handle side are provided so as to be rotatable relative to each other, and a lock member that normally prevents relative rotation between the two members, an elastic member that biases the lock member to a locked state, and an excessively large amount between the two members When a relative rotational torque is generated, the lock member is moved against the biasing force of the elastic member to allow relative rotation of the two members.

As a result, when an operating force within the normal range is applied to the handle, the handle and the intermediate rotation transmission type operate in conjunction with each other, but when an excessive operating force is applied to the handle, the above-mentioned operation is performed. The lock member is moved by the cam portion by the relative rotation torque of the two members including the handle jack, and the relative rotation between both members is allowed. Therefore, the overload due to the unreasonable operation is absorbed, and the internal parts are damaged. Also, it is possible to avoid unintentional unlocking.

[0006]

1 is an overall perspective view of an embodiment of the present invention, and FIG. 9 is an overall sectional view thereof.

In FIG. 1, when the left and right sides of the door lock main body, that is, the left side in the figure is the inside and the right side is the outside, a lever-shaped handle 1 is connected to each side. Two annular cups 102 are installed between the door lock body and the handle 1, and a cylindrical cup 37 is provided between the annular cups 102 in the center of the door lock body. A bolt 101 capable of projecting to the outside is installed in a direction perpendicular to this. 1 and 9
As shown in FIG. 3, the outer handle 1 is provided with a key hole 1a, and the inner handle 1 is provided with a locking button 35.
Here, for example, when the inner or outer handle 1 is rotationally operated, the bolt 101 is retracted so that the door can be opened and closed, and the door is locked by pressing the button 35 and closing the door. For example, the door lock state can be released (unlocked) by inserting a key into the key hole 1A and turning the key.
The locking method may be a push button locking type, a key locking type, or an automatic locking type. Further, in locking the lock, a dead bolt for locking may be provided in addition to the so-called latch bolt, or the latch bolt may also serve as the dead bolt. Further, in the door lock (locked) state, the handle 1 may be a fixed type, or may be a type in which the handle 1 can be turned without being fixed but the locked state is maintained.

FIG. 2 is an exploded perspective view of components on the outer handle side, and FIG. 3 is a sectional view thereof. In these figures, an adjusting plate 4 having a circular hole 4A in the center is provided on the back side of the above-mentioned annular cup 102, and the bracket 8 is opposed to this.
Is provided. These adjusting plate 4 and bracket 8
Is for adjusting the difference according to the thickness of various doors, and a spring 5 for supporting and adjusting the space between them by elastic force is provided between the adjusting plate 4 and the bracket 8. Has been inserted.

An external spindle housing 9 is inserted through the circular hole 4A. The outer frame plate 12 is inserted from the inside into the external spindle housing 9, and the lever shank 7 as the handle side shank is inserted from the outside. A screw is cut on the outer peripheral cylindrical portion of the external spindle housing 9 described above, a support body 3 is screwed onto this screw portion, and a cover 2 is further attached.

The cylindrical lever shank 7 is connected to the handle 1 by an elastic fixing hook 6 for fixing the handle shown in FIGS. 2 and 3. As shown in FIG. 2, the elastic fixture 6 includes a central protruding portion 6A and two semicircular leg portions 6C extending downward from the central protruding portion 6A, and protrudes outward at an intermediate portion of each leg portion 6C. Each provided with a protruding portion 6B,
Each protrusion 6B is inserted into the small hole 7B of the lever shank 7, and the central protrusion 6A is inserted into the small hole 7A, so that the handle 1 and the lever shank 7 are connected by this elastic fixing hook 6.

Further, as shown in FIG. 9 and the like, an external spindle 15 is fitted inside the lever shank 7 as shown in FIG. 9 and the like, and both are connected by an elastic fixing hook 6 '. As shown in FIG. 2, a groove 7C is formed along the inner peripheral surface of the lever shank 7, and the central protruding portion 6′A of the elastic fixing hook 67 shown in FIG. 4 is fitted into the circumferential groove 7C. That is, the fixing hook 6 ′ and thus the external spindle 15 can rotate relative to the lever shank 7. As shown in FIGS. 2 and 3, the lever shank 7 is provided with a substantially semicircular recess 7D for inserting a part of the safety pin 16 which blocks relative rotation between the lever shank 7 and the external spindle 15. It is formed with a certain depth in a direction parallel to the axial direction.

As shown in FIG. 3, the external spindle 15 shown in FIGS. 4 and 5 is inserted through the circular holes 12B and the side holes 12C of the outer frame plate 12. The outer spindle 15 has a substantially cylindrical shape, and has a fan-shaped cam 15C protruding outward in the radial direction at one end thereof. A spring 14 (FIGS. 4 and 5) for preventing the handle 1 from tilting is provided, and a protrusion 15D is formed on the external spindle 15 to support the protrusion 14A of the spring 14.

Further, the external spindle 15 has a small opening 15F into which a safety pin 16 described later is inserted, and FIG.
A small opening 15E into which the fixing pin 16 'shown in FIG. 5 is inserted is formed. That is, the key spindle 25 shown in FIG. 4 is inserted into the outer spindle 15 as shown in FIG. 5, and both are integrally coupled by the fixing pin 16 ′. In addition, a safety spring 17 described later
The protruding portion 17A formed on the above is inserted into the small opening 15I of the external spindle 15 from the inside. Furthermore, inside the outer spindle 15, a concave groove 15B (FIG. 4) for mounting a fixing ring 18 for mounting the safety spring 17 is formed.

The above-mentioned safety spring 17 is in the shape of a curved leaf spring that is slightly overlapped with the cylindrical shape, and if a force is applied from the outside, one end of this leaf spring moves in the circumferential direction along the inner side. By doing so, the diameter is reduced. On the other hand, when no force is applied, the end portion of the leaf spring can move toward the outside until the diameter becomes a certain size. A protruding portion 17A bent and bent outward is formed on the outer end portion of the safety spring 17 so as to be inserted and fixed in the small opening 15I of the external spindle 15.

As shown in FIG. 5, a safety spring 17, a fixing ring 18 for preventing the detachment thereof, an elastic fixing hook 6'for connecting the external spindle 15 and the lever shank 7 are provided in the external spindle 15 as described above. Is inserted and fixed, and adjacent to the elastic fixing metal fitting 6 ', the floating prevention plate 1
3 is provided. 2 and FIG. 9 through this inside.
The outer shaft 1A shown in FIG. The outer shaft 1A is a cylinder key portion 1B provided in the handle 1.
It is rotated by the key inserted from the key hole 1A. That is, it rotates integrally with the key operating portion rotated by the key.

Further, as shown in FIG. 5, a spring 14 for preventing the tilt of the handle 1 is provided around the outer spindle 15.
Is fitted, and the end portion 14A thereof is hooked on the protruding portion 15D and the bent portion 9B of the external spindle housing 9 shown in FIG. 2 as described above.

Here, almost half of the safety pin 16 fits into the opening 15F of the external spindle 15 below the safety spring 17 in FIG. When the assembly of the outer spindle 15 assembled as described above is combined with the lever shank 7, after inserting the safety pin 16 into the opening 15F, the lever shank 7 and the outer spindle 15 are inserted.
, The safety pin 16 is pushed by the safety spring 17 and fitted into the opening 15F of the external spindle 15 and the recess 7D of the lever shank 7. Since the safety pin 16 is located between the two in this way, it plays a role of connecting the both.

The rotary spindle 19 shown in FIGS. 4, 5 and 9 has a substantially cylindrical shape, and one end portion thereof is provided with two projecting portions 19A along the length direction (axial direction), On the same circumference of the cylindrical portion on the opposite side, there are two small through holes 19C facing each other and another small hole 19B between the small through holes 19C. The inner diameter of the rotary spindle 19 is larger on the side of the protruding portion 19A than on the side opposite thereto. Such a rotary spindle 19 has small holes 19B, 1
A part of 9C is located in the safety spring 17, and the protrusion 19A is coupled with the arcuate hole 24B of the rotary plate 24 shown in FIG. 4 by being fitted therein.

The connecting spindle 21 shown in FIGS.
Has a shape in which a plurality of cylindrical portions having different diameters are integrally coupled on the same axis, and one end face thereof has a recess into which the end portion of the outer shaft 1A shown in FIG. 2 and the like is fitted. 21B (FIG. 5) is formed, and a small hole 21A directed in the radial direction (radial direction) is formed on the circumferential surface of the approximately central portion having a small diameter.

Such a connecting spindle 21 has its small hole 21A aligned with the small hole 19B of the rotary spindle 19 and has a large diameter portion located on the large inner diameter side of the protrusion 19A of the rotary spindle 19. , Fitted in the rotary spindle 19. Further, the spring 23 and the coupling pin 22 are inserted into the small holes 21A of the connecting spindle 21. One end of the coupling pin 22 is supported by the spiring 23, and the other end is supported by the insertion protrusion 20B provided on the leaf spring 20. In a normal state, the connecting pin 22 plays a role of connecting the connecting spindle 21 and the rotary spindle 19.

As shown in FIGS. 9 and 10, the lever shank 7, the external spindle 15, the safety pin 16, the safety spring 17, the rotary spindle 19, the leaf spring 20, the coupling pin 22, and the spring 23 as described above are provided. Etc.
There is no core part of the overload absorption mechanism that absorbs an excessive force applied to the handle 1.

The rotary spindle 19 shown in FIG.
Are connected to the key spindle 25 via the rotary plate 24. Two protrusions 25A extending in the length direction are formed at one end of the key spindle 25, and these protrusions 25A are inserted into the notches 24A of the rotary plate 24. In addition to the long hole 25B, notched holes 25C and 25D formed in the circumferential direction are formed in the cylindrical portion of the key spindle 25, and a cam 25E projecting outward in the radial direction is formed at the other end. Has been formed.

A disk 27 is fitted inside the key spindle 25 so that it can be moved back and forth at its projection 27A so as to be inserted into the groove 25B. Further, a locking plate 29 having a substantially circular shape is provided adjacent to this. A cam 2 having a protruding portion 29A on the upper side of the locking plate 29 and one side surface on the lower side that is inclined.
9B is formed, and the inner shaft 31 is formed in the central portion.
(See Fig. 6) Rectangular hole 29C with a vertically long rectangular shape
The locking plate 29 is fitted into the notch hole 25C of the key spindle 25 or the like.

A spring 26 for elastically supporting the disc 27 is inserted between the disc 27 and the rotary plate 24, and is arranged before and after the locking plate 29 for the correct position adjustment of the fixing pin 16 '. The adjusting plate 28 is arranged in a sandwich. Here, after the assembly of the key spindle 25 described above is inserted into the assembly of the external spindle 15, the fixing pin 16 'is set in the recess 28A of each adjusting plate 28 so that the fixing pin 16' is caught by the inclined surface 29D of the cam 29B. Insert and install in the notch hole 25D. Further, the external spindle 15 is inserted into the outer frame plate 12 (see FIG. 9 and the like), and the fixing pin 16 ′ has the cutout holes 25D and 15E (see FIG. 4) and the outer frame plate 1 and the like.
It is set so as to be located across the second recess 12A (FIG. 3). Here, in order to prevent the fixing pin 16 ′ from separating from the recess 12A, the spring 11 is hooked on the cylindrical portion of the outer frame plate 12.

On the other hand, the configuration on the back side (inside) in FIG. 1 is similar to the above-described configuration on the outside, and as shown in FIG. 6, the internal spindle 15 'arranged inside, the parts assembled to this, This assembled state is similar to the assembly of the external spindle 15 shown in FIGS.
That is, in this embodiment, as shown in FIG. 9, the safety pin 16 is provided between the inner lever spindle 7 and the inner spindle 15 ′, and this has a recess 7 D formed on the inner circumference of the lever shank 7. A safety spring 17 is mounted on the inner spindle 15 'so as to extend across a small opening 15'F formed on the inner spindle 15' and to bias the same outwardly. On the left side (inner side) of FIG. 9, the rotary spindle 19, the connecting spindle 21 and the like which are provided on the outer side are omitted, and instead the operating force of the button 35 is transmitted to the key spindle 25 side. The inner shaft 31 is inserted therethrough.

The inner shaft 31 is in the form of a strip having a long strip shape, and has an insert portion 31A (FIG. 6) at the front end portion thereof.
Is formed, and the front portion is, for example, about 90 degrees,
A twisted portion (cam portion) 31C twisted at a predetermined angle is formed. Located behind this twisted portion 31C,
The inner shaft 31 is formed with a lateral recess 31B, and a groove 31D, a protrusion 31E and the like are formed at the rear end.
As shown in FIG. 9, an assembly of a housing 32 and a button 35 is fitted and fixed to the rear end portion of the inner shaft 31. Such an inner shaft assembly corresponds to the assembly of the inner spindle 15 '. It is connected to the key spindle 25 through a disc 27 through the inside and a bracket portion (lock mechanism) described later. The disk 27 is installed in the key spindle 25 so as to be movable back and forth within a certain range, and is inserted into the central hole 27B (FIG. 4) of the disk 27 as described above.
31A is inserted. Further, the inner lever shank 7 is fitted and coupled to the internal spindle 15 'as described above. Further, in FIG. 7, the outer shell portion on the inner handle side is substantially the same as that described with reference to FIGS. 2 and 3 which are outer shell portions.

FIG. 8 shows an example of a bracket portion (door lock mechanism) installed in the central portion of the door lock device and configured as a component for performing the functions of opening and closing the door lock and locking / unlocking. This is mainly a square shape, and is slidable by being inserted between two support portions / guides 38 having a rail portion 38B at the center, a bottom end plate 42 connecting these, and the support portion / guide portions 38. Two floating plates 39, the floating plates 39 are coupled to each other, and the cams 15C, 25E, 15'C
It includes a stopper 45 and springs 43 and 44, as well as two hanging plates 40 that adjust the opening and closing of the door lock by engaging with (FIGS. 4 and 6). In the bracket portion having such a configuration, the support portions / guides 38 on both sides thereof are joined and fixed to the outer frame plate 12 and the inner frame plate 12 ′,
The inner shaft 31 passes through the space between the floating plates 39.

The stopper 45 defines the movement limit of the floating plate 39, and the door lock mechanism as described above has little relation to the essential part of the present invention, so a detailed description thereof will be omitted. It acts as a door lock. The floating plate 39 projects laterally from the opening 37A of the cup 37,
The door is closed by fitting this into the opening of the other receiving plate (not shown). Further, for example, by closing the door with the button 35 shown in FIG. 9 pressed, the door lock mechanism can be activated. And if you press the button 35 from the inside, the lock is released,
From the outside, the locked state can be released by inserting a key from the key hole 1A and turning it.

Next, the operation will be described. Now, it is assumed that the door lock is locked and the handle 1 is locked so that it cannot be rotated. In that state, if an unreasonable force is applied to the outer handle 1, the lever shank 7 of FIG. 10 receives the unreasonable operating force and tries to rotate, for example, in the clockwise direction, but the outer spindle 15 does not move to the door. Since they are connected to the lock mechanism and are in a fixed state, an excessive relative rotational torque is generated between them. As a result, as shown in FIG. 11, the lever shank 7 rotates, pushing up the safety pin 16 from the recess 7D and moving it inward. That is, the slope of the recess 7D acts as a cam portion to push up the safety pin 16, and the safety pin 16 is disengaged from the recess 7D. As a result, the lever shank 7 and the external spindle 15 are relatively rotatable.

As the safety pin 16 is disengaged, the safety pin 15 pushes the safety spring 17 inward, so that the insertion protrusion 20A of the leaf spring 20 resists the coupling pin 22 against the urging force of the spring 23. And pushes it toward the center side to disengage the connecting pin 22 from the rotary spindle 19. As a result, the connection between the rotary spindle 19 and the connecting spindle 21 is also released, and the two become relatively rotatable. As a result, only the lever shank 7, the outer shaft 1A and the connecting spindle 21 can rotate together with the handle 1 due to the excessive force applied to the handle 1. Therefore, even if an unreasonable force is applied to the handle 1 from the outside, it is possible to prevent the internal components of the door lock device from being overloaded, and it is possible to prevent the internal components from being damaged or damaged. Further, after the state shown in FIG. 11, even if the outer shaft 1A is rotated by a key or the like in order to open the door lock in the closed state from the outside, the rotation spindle 19 and the connection spindle 21 in FIG. In the state where the coupled state is released, the unlocking operation force by the key or the like is not transmitted to the lock mechanism, and the unlocking cannot be performed. Therefore, if you try to open the door for the purpose of illegal entry,
There is also a merit that the crime prevention effect is enhanced.

On the other hand, when the handle 1 is rotated by a normal operation force to open and close the door, the safety pin 16 is connected to the lever shank 7 and the external spindle 15 as shown in FIG.
Since the doors are kept connected, the normal door opening and closing can be performed without any discomfort. Further, even in the case of such an unlocked state, or when it is locked but the handle 1 can be rotated, even if the handle 1 is forcibly rotated beyond the rotation limit, the above is performed. Similar to the above description, the state shown in FIG. 10 is changed to the state shown in FIG. 11, and the overload is absorbed to prevent the destruction of internal parts.

When shifting from the state of FIG. 10 to the state of FIG. 11, it is normal for the coupling system between the parts from the lever shank 7 to the rotary spindle 21 to have some clearance, and therefore the lever shank 7 It is easy to prevent an unreasonable force from acting on the connecting system before the state of FIG. 10 to the state of FIG. 11 is reached, and the rotary spindle 21 may follow the rotation of the lever shank 7 with a slight delay. It's just as easy.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an assembled state of a lever type door lock device.

FIG. 2 is an exploded perspective view of components installed outside a lever-type door lock device.

FIG. 3 is a cross-sectional view showing an assembled state of the parts shown in FIG.

FIG. 4 is an external spindle of a lever type door lock device,
The disassembled perspective view of the components inserted in this inside.

5 is a sectional view showing an assembled state of the components shown in FIG.

FIG. 6 is an exploded perspective view of the inner lever shank and the inner spindle of the lever-type door lock device and parts inserted therein.

FIG. 7 is an exploded perspective view of an inner outer shell portion of the lever-type door lock device.

FIG. 8 is a sectional view of a bracket portion (lock mechanism) of the lever-type door lock device.

FIG. 9 is a cross-sectional view showing an entire assembled state of the lever type door lock device.

FIG. 10 is a cross-sectional view showing a normal state of the lever type door lock device.

FIG. 11 is a cross-sectional view illustrating an operation when an excessive force is applied to the handle.

[Explanation of symbols]

 1 Handle 7 Lever Shank 7D Recess (Cam) 15 External Spindle 16 Safety Pin 17 Safety Spring 19 Rotating Spindle 20 Plate Spring 21 Connecting Spindle 22 Connecting Pin

Claims (5)

[Claims] 1. A door lock in which inner and outer handles are provided so as to be concentrically located inside and outside the door, and the door is opened and closed by rotating the handle and the door is locked by a lock mechanism. In the device, a handle-side shank connected to at least one of the handles and a rotation transmission system from the handle-side shank to the lock mechanism are provided, and the handle is provided when an operating force in a normal range is applied to the handle. Of the rotary operation force to the lock mechanism, while on the other hand, when an overloaded rotary operation force exceeding the normal range acts on the handle, relative rotation is allowed between the handle side and the lock mechanism side. And an overload absorbing mechanism that includes a lock member provided in a state of straddling the handle side and the lock mechanism side, and the lock member including the lock member. An elastic member that biases the elastic member, and a cam portion that disengages the lock member toward the handle side or the lock mechanism side against the force of the elastic member due to the excessive torque that tends to cause the relative rotation, A door lock device comprising: 2. An inner and outer handle for rotation, which is connected to the inside and the outside of the door so as to be positioned concentrically with each other, and has a lock button on one side and a key hole on the other side. A door lock device having a lock mechanism for opening and closing the door by rotating a handle and locking the door at an intermediate portion of the inner and outer handles, wherein at least one of the handles is integrated with the door. Formed on the handle side shank, the handle side spindle inserted into the handle side shank so as to be rotatable relative thereto, the recess formed on the handle side shank, and the handle side spindle. A safety pin that is inserted across the opening and normally prevents the relative rotation of the handle shank and the handle spindle, and is supported inside the handle spindle. And a safety spring that supports the safety pin in a state in which the safety pin can be released from the recess due to an excessive rotation torque applied to the handle side shank, and a spring receiving portion provided inside the safety spring. A rotary spindle having an insertion hole, an intermediate spring attached to a spring bearing portion of the rotary spindle and indicating a protrusion inserted into the insertion hole, and further provided inside the rotary spindle. A connecting spindle having a radial pin insertion portion, and one end portion supported by an elastic member provided on the pin insertion portion side while being inserted into the pin insertion portion of the connection spindle. And a coupling pin supported by the protrusion of the intermediate spring or the inner surface of the rotary spindle. . 3. The door lock device according to claim 1, wherein the handle is a lever type handle. 4. The rotating spindle has a connecting groove formed at one end for connecting a shaft that is rotated by a rotating operation of a key inserted into the key hole, and has a plurality of outer diameters different in diameter in the axial direction. The door lock device according to claim 2 or 3, wherein the cylinders have a shape combined on the same axis. 5. The inner diameter on the lock mechanism side of the rotary spindle is larger than the inner diameter on the opposite side, and the outer diameter on the inner end side of the connecting spindle is larger than the other portions. The door lock device according to any one of the above.