JP3844810B2 - Operation mode switching device for automatic locking lock - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an operation mode switching device (hereinafter simply referred to as a switching device) in an automatic locking type lock, and more particularly to a switching device capable of emptying an automatic locking type lock with a simple operation.
[0002]
[Prior art]
For example, locks used in guest rooms of hotels, doorways of corporate laboratories, and the like often use so-called automatic locking locks in order to improve safety.
[0003]
An example of this self-locking lock will be described later, but when the latch bolt is inserted into the strike hole of the door frame when the door is closed, the member that fixes the latch bolt in the protruding position automatically operates, The door can be locked without locking the lock with the combined key.
[0004]
If this automatic lock type lock is attached to the door of a laboratory or the entrance / exit of an employee of a financial institution, etc. In many mornings and evenings, every time a person enters or exits, it is cumbersome to operate a key code input panel for a key or electric lock.
[0005]
In view of this, a latch bolt locking device that holds the automatic locking latch bolt in a state of being temporarily immersed in the lock box and uses this as an empty lock has been proposed and put into practical use.
[0006]
For example, the latch bolt locking device opens a door in a state where the latch bolt is retracted into the lock box by operating a handle or knob on the indoor side, and a control rod exposed at the free side edge of the door is, for example, The latch bolt is locked by operating with a screwdriver (not shown).
[0007]
[Problems to be solved by the invention]
The latch bolt locking device described above, of course, has been put into practical use with its intended function, but in order to operate the locking device, the door is opened once to expose the control rod, and the door opening is searched for a driver etc. There is a grudge that the operation is somewhat troublesome.
[0008]
Also, since the latch bolt is retracted into the lock box, if the lock is attached to the door opening leading to the external space, the door pressed against the door by the closer may be blown by the wind and open. There is also the inconvenience.
[0009]
Therefore, an object of the present invention is to provide a switching device that can be operated with fingers with the door closed, and that does not require the use of a screwdriver or the like.
[0010]
Another object of the present invention is to provide a switching device that can hold a latch bolt to a door frame even in an empty lock state, and that does not open the door even if the door is blown by wind. is there.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is coupled to a base of a retractor of a latch bolt that also functions as a dead bolt, is rotatably supported in a lock box, and forms an inner hole having a non-circular cross section. A short cylindrical retractor shaft, an indoor operation member that is mounted on the free side edge of the door inner surface and is pivotally supported with the rotation shaft coaxial with the retractor shaft, and the free side of the door outer surface An outdoor operation member that is mounted on the end edge portion and is rotatably supported with a rotation shaft that is coaxial with the retractor, and a housing that mutually connects the retractor shaft and the indoor operation member. The outer end is fitted in the inner hole of the retractor shaft, and is movable in the length direction, but is guided so as to restrain relative rotation with respect to the retractor shaft and the indoor operation member. 1 operation rod and outside the lock box of this first operation rod This is a housing that connects the engaging projection, which is provided on the projecting part, the retractor shaft, and the outdoor operation member, to the inner end of the retractor shaft in order from the inside. A circular cross-section that is not thicker than the adjacent round bar, and a deformed cross-section that can be slidably fitted with the inner hole of the retractor shaft, while being relatively pivoted, are connected continuously, and the indoor side end is A second operating rod that is movable in the length direction while being inserted into the inner hole of the tractor shaft, but is guided so as to restrain relative rotation with respect to the outdoor operation member, and the second operation A spring member that urges the rod in the direction of moving to the indoor side and a guide that is movable in a plane parallel to the door surface in the vicinity of the engaging protrusion of the first operating rod, and is engaged with the engaging protrusion from the indoor side. A drive cam body with a slantable surface, an operation knob projecting on the inner surface of the door, A linkage mechanism that transmits the movement of the knob to the drive cam body and selectively moves the inclined surface away from the engagement protrusion and in the direction of engagement with the engagement protrusion; When switching, the first operating rod integrated with the engaging projection and the second operating rod contacting the engaging projection are moved to the outdoor side by the inclined surface of the drive cam body, and the deformed cross section of the second operating rod is moved into the retractor shaft. It is characterized by being removed from the hole.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
1, reference numeral 1 indicates a door, reference numerals 2 and 3 indicate outer and inner escations, respectively, and a lock box 4 (see FIG. 3) in the door 1 between the outer and inner escations 2 and 3. Is installed.
[0013]
The structure of the lock box of the automatic locking is well known and, in addition, is not the gist of the present invention, but for the sake of safety, an example of the structure is shown in FIG. 3 and is connected to the inner cylinder and / or thumb turn shaft of the cylinder lock. A sector gear 6 is formed on the outer periphery of the control cam 5.
[0014]
The sector gear 6 is guided so as to be movable in the front-rear direction and meshes with a rack formed on a part of the unlocking board 7 biased in the forward direction. The provided unlocking pin 8 is in contact with the inclined portion of the locking lever 9 from the front.
[0015]
With the configuration described above, for example, when the control cam 5 is turned counterclockwise in FIG. 3 by a key combination, the unlocking pin 8 moves rearward, so that the locking lever 9 rotates clockwise to lock the latch bolt. solve.
[0016]
When the control cam 5 is further rotated counterclockwise by the key combination, the unlocking board 7 moves the latch board 13 backward via the connecting piece 12, so that the latch bolt 11 mounted on the latch board 13 is moved into the lock box 4. Immerse yourself in.
[0017]
Further, the angular axis of the indoor side operation member such as a handle that is normally mounted only on the indoor side is fixed in a state of being fitted into the deformed inner hole of the retractor shaft 14, and thus the indoor side operation member 15. (Refer FIG. 1) and the retractor 16 are mutually connected.
[0018]
Therefore, when the retractor 16 is rotated clockwise in FIG. 3 by operating the indoor operation member, the front end of the retractor 16 engages with the rear end of the latch board 13 and is retracted inward. Therefore, the unlocking board 7 is also moved backward via the connecting piece 12, and the unlocking and the immersion operation of the latch bolt 11 into the lock box are performed as described above.
[0019]
Returning to FIG. 1 in which the lock box and its internal mechanism are omitted for clarity, reference numeral 14 denotes a retractor shaft. The retractor shaft 14 is a latch bolt retractor 16 (also serving as a dead bolt). A short cylinder coupled to the base of Fig. 3), which is rotatably supported in the lock box.
[0020]
The retractor shaft 14 is formed with an inner hole 17 (see FIG. 6) having a non-circular cross section. The inner hole 17 shown in FIG. 6 has a square cross section. For example, as shown in FIG. 3, four V-shaped grooves may be formed in the circular hole with a broaching machine along the generatrix.
[0021]
On the other hand, as shown in FIG. 1, an indoor side operation member 15 as a handle is rotatably mounted on the free side edge portion of the inner surface of the door so that the rotation shaft is coaxial with that of the retractor shaft 14. .
[0022]
In the illustrated embodiment, the base portion of the indoor operation member 15 is rotatably fitted to a short cylindrical bearing portion integrally formed on the inner surface side of the inner escation 3, and a portion protruding inward from the bearing portion is provided. A retaining ring 18 is fitted and fixed via a washer.
[0023]
On the other hand, as shown in FIG. 1, an outdoor side operation member 19 as a handle is rotatably mounted on the free side edge portion of the outer surface of the door so that the rotation shaft is coaxial with that of the retractor shaft 14. .
[0024]
The attachment of the outdoor operation member 19 to the outer escation 2 is the same as that of the indoor operation member 15, and thus further detailed description is omitted.
[0025]
The retractor shaft 14 and the indoor operating member 15 are connected to each other by a first operating rod 21 having a square bar shape with a square cross section.
[0026]
That is, the outdoor end (the left end in FIG. 1) of the first operating rod 21 is fitted into the inner hole of the retractor shaft 14 having the same cross section, and the indoor end of the first operating rod 21 is A sliding hole (not numbered) having a square cross section formed in the base of the indoor operation rod 15 is slidably fitted.
[0027]
With the configuration described above, the first operating rod 21 cannot be relatively rotated with respect to the retractor shaft 14 and the indoor operation member 15, but is guided so as to be movable in the length direction thereof.
[0028]
In other words, the indoor operation member 15 and the retractor shaft 14 are integrally connected in the rotation direction via the first operation rod 21.
[0029]
As shown in FIGS. 1 and 2, an engaging projection 21a as a thin rod that is driven so as to penetrate the first operating rod 21 in a horizontal direction is provided on the outside of the lock box 4 of the first operating rod 21. Has been.
[0030]
On the other hand, the retractor shaft 14 and the outdoor operation member 19 are connected to each other by a square operating bar 22 having a square cross section.
[0031]
A circular cross-sectional portion 22 a that is not thicker than a round bar inscribed in the inner hole of the retractor shaft 14 is formed at the indoor side end portion (the right end portion in FIG. 1) of the second operating rod 22.
[0032]
Here, a round bar is inscribed in the inner hole means that a circle that is a cross-sectional shape of the round bar is inscribed in, for example, a square that is a cross-sectional shape of the inner hole.
[0033]
The end of the second operating rod 22 on the indoor side (the right end in FIG. 1) is fitted into the inner hole of the retractor shaft 14 having the same cross section, and the end of the second operating rod 22 on the outdoor side is In addition, it is slidably fitted into a receiving hole (not numbered) having a square cross section formed in the base of the outdoor operation rod 19.
[0034]
With the above configuration, when the second operating rod 22 is fitted with the inner hole 17 of the retractor shaft 14 as shown in FIG. 1, the square cross section (deformed cross section 22 b) connected to the circular cross section 22 a is engaged. The relative rotation with respect to the retractor shaft 14 and the outdoor operation member 19 cannot be performed, but is guided so as to be movable in the length direction.
[0035]
In other words, the outdoor operation member 19 and the retractor shaft 14 are integrally connected via the second operation rod 22 in the rotation direction.
[0036]
Further, a spring member 23 as a compression coil spring is elastically mounted at the back of the square hole formed in the base portion of the outdoor operation member 19, in other words, at the left end portion in FIG. 1, and the elasticity of the spring member 23 Thus, the outdoor side and indoor side operation members 19 and 15 are biased in the direction of moving to the indoor side.
[0037]
On the other hand, as shown in FIGS. 1 and 2, on the inner surface side of the inner escation 3 in the vicinity of the engagement protrusion 21a of the first operating rod, a plate-like drive cam body 24 parallel to the door surface is provided in the vertical direction. It is guided to be movable.
[0038]
This drive cam body 24 has a rectangular main body portion bent in a U-shaped cross section and a bifurcated inclined surface formed at the lower end of the main body portion. It is possible to move in the vertical direction by being guided by the guide pillars 27 and 27.
[0039]
In order to move the drive cam body 24 from the indoor side, an operation knob 28 (shown only in FIG. 1) is rotatably mounted on the outer surface (inner side surface) of the inner escation 3.
[0040]
In order to transmit the movement of the operation knob 28 to the drive cam body 24, a linkage mechanism 29 is provided.
[0041]
The linkage mechanism 29 in the illustrated embodiment has a drive lever 31 that is integrally connected to the operation knob 29 and has a generally L-shaped drive lever 31, and the drive lever 31 has a rotation shaft for the operation knob at its center. Coaxially connected to the operation knob.
[0042]
A drive pin 32 is planted at one end of the drive lever, and the drive pin 32 is idled in a substantially laterally convex driven hole 33 (see FIG. 2) opened in the main body of the drive cam body 24. It is fitted.
[0043]
Further, as shown in FIGS. 2 and 6, one end of a spring rod 34 is rotatably coupled to the other end of the drive lever 31, and the other end portion of the spring rod 34 is connected to the inner escation 3. Is loosely fitted in a slit of a horizontal support plate 35 attached to the.
[0044]
Furthermore, an urging spring 36 is wound around the spring rod 34 as a compression coil spring.
[0045]
The spring device including the spring rod 34, the support plate 35, the biasing spring 36, and the like described above is a spring device having a thought position (hereinafter simply referred to as a spring device) in which the angle position where the spring rod 34 is vertical in FIG. 38) (see FIG. 2).
[0046]
In FIG. 1, reference numeral 37 denotes a cylinder lock storage cavity.
[0047]
In the switching device according to the embodiment of the present invention configured as described above, when the lock to which the present invention is applied is made into an empty lock, the drive cam body 24 is moved to the first operation as shown in FIGS. The operation knob 28 is turned in a direction away from the hook engaging protrusion 21a.
[0048]
In the state shown in FIGS. 1 and 2, the spring member 23 mounted on the outdoor operation member 19 moves the first and second operation rods 15 and 19 to the indoor side. The deformed cross-section 22b in the top is fitted in the inner hole of the retractor shaft 14.
[0049]
In this state, the outdoor operation member 19 is connected to the retractor 16 (see FIG. 3) in the lock box via the retractor shaft 14.
[0050]
This state is held metastable by the elasticity of the spring device 38 (see FIG. 2).
[0051]
As described above, an automatic locking type lock retractor that is normally connected only to an indoor operation member is designed to automatically unlock the lock when operated. When the operating member 19 is turned, the lock is unlocked at any time, in other words, the lock becomes an empty lock.
[0052]
On the other hand, in order to return the lock to the automatic lock type lock, the operation knob 28 (see FIG. 1) is operated to rotate the drive lever 31 clockwise in FIG.
[0053]
Then, the drive lever 31 integrated with the knob 28 starts to rotate clockwise in FIG. 2 against the elasticity exhibited by the spring device 38.
[0054]
In the initial stage of the rotation, the finger force acts in a direction to compress and compress the biasing spring 36 of the spring device, and the drive lever 31 is moved clockwise while pushing the other end of the spring rod 34 into the slit of the support plate 35. It is driven to rotate.
[0055]
When the spring rod 34 has passed the thought position where it is substantially vertical, the drive lever 31 suddenly rotates clockwise due to the elastic force of the biasing spring 36, and as shown in FIGS. Pushes down the drive cam body 24.
[0056]
Then, the inclined surface 25 at the lower end of the drive cam body 24 is engaged with the engagement protrusion 21a of the first operating rod from the indoor side, and this is pushed outward by the wedge action.
[0057]
As a result, as shown in FIG. 4, the deformed cross section 22 a of the second operating rod 19 is removed from the inner hole of the retractor shaft 14.
[0058]
Further, as is apparent from FIG. 5, this state is held metastable by the elasticity of the spring device 38.
[0059]
In this state, as shown in FIG. 6, only the circular cross section 22a of the second operating rod inscribed in the inner hole of the retractor shaft 14 is fitted. Even if operated from outside, the retractor shaft 14 does not move, and the lock is locked.
[0060]
In order to unlock this lock, there is no other way than unlocking the cylinder lock with the key and moving the control cam 5 (see FIG. 3) in the lock box.
[0061]
It should be noted that the present invention is not limited to the illustrated embodiment, and can be implemented with various modifications.
[0062]
For example, the engagement between the first operating rod 21 and the indoor operating member 15 or the second operating rod 22 and the outdoor operating member 19 is not necessarily performed by fitting the deformed shaft and the deformed hole. You may make it give rotation prevention by engagement of a slit and a pin, for example to fitting of the cylinder of a cross section (not shown).
[0063]
Further, the linkage mechanism between the operation knob 28 and the drive cam body 24 can be configured by adding a click device to a meshing device with a pinion mounted on the former and a rack formed on the side edge of the latter (see FIG. Not shown).
[0064]
Furthermore, the operation shaft of the operation knob 28 is directly coupled to the drive cam body 24 through a longitudinal slit formed in the inner escation 3 so that the drive cam body 24 is moved not by the rotation of the operation knob 28 but by the vertical movement. (Not shown).
[0065]
【The invention's effect】
As is apparent from the above description, the present invention has an initial purpose of switching the automatic lock type lock to the empty lock because the outer operation member is selectively connected to or disconnected from the retractor shaft. Has achieved.
[0066]
In addition, the latch bolt is not retracted into the lock box, and the latch bolt is locked to the strike hole of the door frame even in the empty lock state. There are various effects such as not to occur.
[Brief description of the drawings]
FIG. 1 is a vertical side view of a switching device according to an embodiment of the present invention, showing an automatic locking state.
FIG. 2 is a front view of the linkage mechanism as viewed from line II-II in FIG. 1, showing an automatic locking state.
FIG. 3 is a partially sectional side view showing an example of a lock box having an automatic locking mechanism.
FIG. 4 is a longitudinal side view of the switching device similar to FIG. 1, showing an empty lock state.
FIG. 5 is a front view of a linkage mechanism similar to FIG. 2, showing an empty lock state.
6 is a cross-sectional view taken along line VI-VI in FIG.
[Explanation of symbols]
14 Retractor shaft 15 Indoor side operation member 17 Inner hole 19 Outdoor side operation member 21 First operation rod 21a Engaging projection 22 Second operation rod 22a Circular cross section 22b Deformed cross section 23 Spring member 24 Drive cam body 25 Inclined surface 28 Operation knob 29 linkage mechanism

Claims (1)

It is coupled to the base of the retractor of the latch bolt that also functions as a dead bolt, and is pivotally supported in the lock box. Mounted on the free side edge, mounted on the free side edge of the door outer surface, and the indoor side operation member supported so that the rotation axis is coaxial with the retractor axis. This is an enclosure that connects the outdoor operation member that is pivotally supported coaxially with the tractor, the retractor shaft, and the indoor operation member. A first operating rod that is movable in the length direction in the inserted state but is guided so as to restrain relative rotation with respect to the retractor shaft and the indoor operation member, and a lock of the first operating rod. Engaging projections protruding from the outside of the box, A circular cross-sectional portion that is less than a round bar inscribed in the inner hole of the retractor shaft in order from the inside, and a retractor. The shaft is relatively long with the inner bore of the retractor shaft, and the inner end of the shaft is inserted into the inner bore of the retractor shaft. A second operating rod that is movable in the vertical direction but is guided so as to restrain relative rotation with respect to the outdoor operation member, and a spring that urges the second operating rod in the direction of moving indoors A drive cam body formed with a member and an inclined surface that is guided to be movable in a plane parallel to the door surface in the vicinity of the engagement protrusion of the first operating rod and can be engaged with the engagement protrusion from the indoor side; The operation knob projected on the inner surface of the door and the movement of the operation knob are transmitted to the drive cam body. An interlocking mechanism for selectively moving the inclined surface away from the engaging protrusion and in the engaging direction with the engaging protrusion, and when switching to the automatic locking type lock, the engaging protrusion is formed by the inclined surface of the drive cam body. The first operating rod integrated with the second operating rod and the second operating rod in contact with the second operating rod are moved to the outdoor side, and the deformed cross section of the second operating rod is removed from the inner hole of the retractor shaft. Operation mode switching device for locking locks.

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