JP3963992B2 - Locking device for thumb turn shaft in lock - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a locking device for a thumb turn shaft in a lock. More specifically, the thumb turn shaft cannot be rotated by using an internal key (a key used indoors) so that only a specific person such as an administrator can operate the thumb turn on the indoor side of the door lock. The present invention relates to a thumb turn shaft locking device which can be selectively locked in a certain state.
[0002]
[Prior art]
The thumb turn in a normal door lock can be rotated by anyone inside the room, so even if the administrator intends to place the lock in a locked state, for example, a third party can miss it. Or it may be intentionally unlocked.
[0003]
Conversely, even if the administrator intends to place the lock in an unlocked state, a third party may mistakenly or intentionally lock it.
[0004]
Such a situation may cause problems such as theft due to unintentional unlocking of the door lock, or may impede the management of visitors to and from a theater or the like.
[0005]
[Problems to be solved by the invention]
The locking device for the thumb turn shaft in the lock according to the present invention makes it impossible to operate the thumb turn on the indoor side of the door lock unless a limited person such as an administrator uses the inner key to rotate the door. It was proposed for the purpose of eliminating problems such as theft caused by opening and preventing visitors from entering or leaving the theater.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a horizontal thumb-turn shaft portion rotatably supported by a lock box fixed to an open side end of a door , in a direction perpendicular thereto. extends, the Jotomehen is projected input from the front portion of the lock box with integrally coupling the actuating member to operate, the engagement piece provided on the actuating member, whereas, the thumb-turn shaft in lock box Extending in the radial direction, with one end facing the thumb-turn shaft and the other end facing the opening on the side of the lock box. In this frame piece, a plate-like control piece extending in the length direction of the frame piece is housed and its base end is rotatably supported. It is configured so that it can selectively occupy the engaging position that interferes and the non-engaging position that does not interfere. The thumb turn shaft is made non-rotatable, and on the other hand, an elongated plate-shaped inner key is inserted into the inner key insertion passage from the outside of the lock box, so that it does not collide with the free end of the control piece. The free end is shifted so as to occupy the non-engagement position by contact, so that the thumb turn shaft is freed .
[0007]

DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described based on embodiments shown in the drawings.
1-4, the code | symbol 10 is a door, The door 10 may be a rotary door or a sliding door. Reference numeral 20 denotes a door frame facing the opening side end of the door 10 or another door forming a pair.
[0008]
Reference numeral 1 denotes a lock box that is fixedly provided with a screw 91 or the like by narrowing imposition or carving the open- end of the door 10, the lock box 1 is, for example, lock box body 11, is hit from the back to the body 11 crack It comprises a back plate 12 and a lid plate 13.
[0009]
A thumb turn shaft 2 is horizontally supported at a substantially central portion of the lock box 1 so as to be rotatable. A thumb turn 21 as a knob is fixed to the outer end of the thumb turn shaft 2 on the indoor side with a set screw or the like (not shown), and the inner cylinder of the cylinder lock 3 is usually attached to the outer end of the thumb turn shaft 2. The tail piece is engaged.
[0010]
The cylinder lock 3 is fixed to the lock box 1 and its outer end is exposed to the outside through a through hole of the door 10.
[0011]
In most cases, the cylinder lock 3 is usually provided for the lock device according to the present invention. However, when the cylinder lock 3 is not provided, the lock device is an internal lock operated only by a thumb turn.
[0012]
When the thumb turn shaft 2 in the illustrated example is rotated by an unillustrated outer key (a key used on the outdoor side) that is inserted into the thumb turn 21 or the cylinder lock 3, the thumb turn shaft 2 is provided in the lock box 1. At least one locking piece 41, 42 that protrudes is operated via an actuating member 5 such as a dead cam.
[0013]
The lock shown in the figure has two locking pieces, that is, a dead bolt 41 that is slidably guided in the horizontal direction in the lock box 1 and a hook that is pivotally supported by a pivot 43 that also serves as a support in the lock box 1. 42 is provided.
[0014]
These are fixed to the door frame or other door 20 with screws 92 or the like when the tip side is displaced in the directions indicated by arrows A and B in FIG. 4 and protrudes from the front opening 14 of the lock box 1. It engages in the entrance 40 of the strike 30 and locks the door 10 to which the lock is attached in a closed state.
[0015]
In the illustrated example, the dead bolt 41 is formed by bending one plate material so that the cross-section is L-shaped, and the hook 42 is formed by joining two plate materials whose planar shape is bowl-shaped. It is.
[0016]
The reason why the deadbolt 41 and the hook 42 are provided in the lock of the illustrated example is that the door 10 to which the lock is attached can be applied regardless of whether it is a door or a sliding door.
[0017]
Further, the lock box 1 is provided with a rear opening 15 symmetrically with respect to the front opening 14, but the rear opening 15 protrudes rearward from the rear end side of the dead bolt 41 and the hook 42 which are made symmetrically in the front-rear direction. It is for making it possible.
[0018]
According to this structure, it is also supposed to freely attach the lock against the door 10 (freely open the door 10) is different in the left and right to correspond with the same lock.
[0019]
1 to 4, reference numeral 5 denotes a dead cam fixed to the thumb-turn shaft 2, and an engagement pin 51 that forms a part of the cam projects from one end of the dead cam.
[0020]
The dead cam 5 is engaged with a driven notch 44 having a substantially inverted V shape of the dead bolt 41 via an engagement pin 51, and the front and rear openings of the lock box 1 are opened as the thumb turn shaft 2 rotates. The leading end side of the dead bolt 41 guided by 14 and 15 is caused to protrude from the front opening 14.
[0021]
In other words, the dead cam 5 is an operating member that operates the dead bolt 41 that is one locking piece.
[0022]
Further, the dead bolt 41 and the hook 42 which is the other locking piece are linked by linkage means 52 comprising a pair of pins and a long hole. When the dead bolt 41 is linearly slid and displaced, the dead bolt 41 In accordance with the displacement of 41, the hook 42 can swing about the pivot 43 as the center of rotation.
[0023]
In this operation, the dead bolt 41 functions as one of the operating members like the dead cam 5 including the engaging pin 51 .
[0024]
The other end side of the dead cam 5 is bent in a U shape to form an engagement piece 53. This engagement piece 53 selectively engages with a control piece 6 which will be described later and requires the thumb turn shaft 2. In response to this, it is stopped (locked) in a non-rotatable state.
[0025]
Although the engagement piece 53 in the illustrated example is formed by bending a part of the dead cam 5, this engagement piece can also be provided as a dedicated one different from the dead cam 5 with respect to the thumb-turn shaft 2.
[0026]
Between the other end of the dead cam 5 and one column 16 of the lock box 1, an open leg spring 54 as a thought spring for stably positioning the dead cam 5 at the unlocked position or the locked position is stretched. is there.
[0027]
In order to prevent the dead cam 5 from being displaced from the intended position by a slight external force, a click means (not shown) such as a click spring may be attached to the dead cam 5 in place of the thought spring 54.
[0028]
The above-described engagement piece 53 swings (rotates) with the rotation between the unlock position and the lock position of the thumb turn shaft 2 by the operation of the thumb turn 21 on the indoor side. A control piece 6 that can be displaced between an engagement position (see FIG. 1) and a non-engagement position (see FIG. 3) is further provided in the lock box 1 so as to correspond to the piece 53.
[0029]
The control piece 6 of the embodiment is of a swinging type in which a base end is pivotally attached to a frame piece 7 having a U-shaped cross section forming an inner key insertion passage 71 which will be described later, and the free end at the tip is an engaging portion The pivot shafts 61 and 61 project integrally on both sides of the base end of the control piece 6 and are rotatably fitted in the fitting holes provided in both leg portions of the U-shaped frame piece 7. It is.
[0030]
The control piece 6 is a compression spring or any other type of spring so as to occupy an engagement position to engage with the engagement piece 53 in a normal state in which an inner key 8 described later is not inserted (see FIG. 1). The inner key insertion passage 71 is provided in the lock box 1 near the control piece 6 and is opened (17) outside the lock box 1 on the indoor side. When the inner key 8 is inserted (see FIG. 3), the non-engagement position is occupied against the urging force of the compression spring 62 or the like by contact with the inner key 8.
[0031]
In addition, the U-shaped frame piece 7 mentioned above engages the back plate 12 in the lock box 1 with the small protrusion piece integrally provided in the lower part of the leg part, and the top plate part and the cover plate in the lock box 1 13 is fixed in the lock box 1 by pressing it with a support 16 provided between the lock 13 and the lock box 1.
[0032]
As clearly shown in FIG. 5, in the illustrated inner key 8, for example, the stem portion is formed in a simple bar shape without a key ring. In addition, there is a click formed by a pair of a small hole or a recess and a small protrusion between the stem portion of the inner key 8 and the control piece 6 with which the stem portion comes into contact when the inner key 8 is inserted into the insertion passage 71. Means 81 are provided.
[0033]
According to the clicking means 81, even if the finger is released from the inserted inner key 8, the inner key 8 can be reliably maintained in the state as it is. Needless to say, the inner key 8 is not limited to the shape of the illustrated example, but can be arbitrarily designed.
[0034]
The inner key 8 is inserted into the inner key insertion passage 71 when the thumb turn 21 is rotated, and the inner key 8 is removed when the thumb turn 21 is made unrotatable at the unlocked position or the locked position. It will be stored in a place.
[0035]
Although the control piece 6 in the illustrated example is shown as a swing type as described above, this control piece is of a linear movement type that is reciprocally slid linearly by appropriate guide means in the lock box 1. It can also be.
[0036]
In FIG. 1, reference numeral 22 denotes a retaining ring of the thumb-turn shaft 2, and reference numeral 45 denotes a spacer fitted on the pivot 43.
[0037]
Next, the operation of the thumb turn shaft locking device of the present invention will be described. In tablets embodying the apparatus of the present invention, in a normal state not crowded difference the locks 8 on the inner key insertion passage 71 in the lock box 1 (see FIG. 1), the engagement piece 53 is compressed to provided the thumb shaft 2 Since the control piece 6 occupying the engagement position by the urging force of the spring or other urging means (62) is locked and restrained at the lock position or the unlock position, the thumb turn 21 is rotated by the thumb turn 21. Becomes impossible.
[0038]
Therefore, in such a normal state, the locking pieces 41 and 42 cannot be displaced from the locking position or the unlocking position originally intended by a specific person such as an administrator. It cannot be deliberately opened or closed.
[0039]
Further, when the administrator or the like causes the locking pieces 41 and 42 to be displaced or retracted by rotating the thumb turn 21, the inner key 8 is inserted into the inner key insertion passage 71 through the opening 17 that is a key hole of the lock box 1. (See FIG. 3), the locking restraint by the control piece 6 of the engagement piece 53 is released, so that the rotation operation of the thumb turn shaft 2 by the thumb turn 21 can be performed freely.
[0040]
In the illustrated locking device, the inner key 8 is inserted into the inner key insertion passage 71 even when the locking pieces 41 and 42 are protruded or immersed through the cylinder lock 3 by an outer key (not shown). If it is not placed in the open state, the rotation operation of the thumb turn shaft 2 by the cylinder lock 3 is impossible for the same reason as described above. Therefore, when locking / unlocking only with the cylinder lock 3 using only the outer key, Key 8 must be left plugged in.
[0041]
【The invention's effect】
According to the thumb turn shaft locking device in the lock of the present invention described above, the operation of the thumb turn can be performed only by a specific person such as an administrator by inserting / removing the inner key. Alternatively, the door lock cannot be unlocked or locked deliberately, which eliminates problems such as theft, and prevents the visitors to the theater from entering or leaving illegally.
[Brief description of the drawings]
FIG. 1 is a longitudinal front view showing an example of a lock embodying the present invention in a state where an inner key is not inserted.
FIG. 2 is a longitudinal side view taken along line II-II in FIG.
FIG. 3 is a longitudinal front view of the lock shown in a state where an internal key is inserted into the lock of FIG. 1 ;
4 is a longitudinal side view taken along line IV-IV in FIG. 3;
5A and 5B are diagrams showing an example of a key used for the lock shown in FIG. 1, wherein FIG. 5A is a plan view and FIG. 5B is a side view.
[Explanation of symbols]
10 Door 1 Lock box 2 Thumb turn shaft 21 Thumb turn 41 Locking piece 42 Locking piece 5 Actuating member (dead cam)
53 Engagement piece 6 Control piece 71 Inner key insertion passage 8 Inner key

Claims (1)

A part of the horizontal thumb-turn shaft that is pivotally supported by a lock box fixed to the open end of the door, extends in a direction perpendicular to the lock box, and projects from the front of the lock box. An operating member for operating the lock piece to be inserted is integrally coupled, and an engaging piece is provided on this operating member, while extending in the radial direction of the thumb turn shaft in the lock box, and one end thereof is connected to the thumb turn shaft. A frame piece with a U-shaped cross section facing the opening on the side of the lock box is fixed, and the inside is used as an inner key insertion passage. On the other hand, in the frame piece, in the length direction of the frame piece An extended plate-shaped control piece is housed and its base end is rotatably supported, and the free end swings to engage with the movement locus of the engagement piece, and the non-engagement does not interfere The position can be selectively occupied, and the free end is normally urged so as to occupy the engagement position. On the other hand, an elongated plate-shaped inner key is inserted into the inner key insertion passage from the outside of the lock box, and the free end is brought into the non-engagement position by contact with the free end of the control piece. A thumb-turn shaft locking device in a lock, characterized in that the thumb-turn shaft is free to be moved by shifting to occupy.

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