JP4652896B2 - Thumb turn for door lock - Google Patents

Description

  The present invention relates to a thumb turn for a door lock that can prevent unauthorized unlocking.

  Recently, a door lock attached to a door is known to be illegally unlocked by a “thumb turn”. In other words, this thumb turn means that there is a gap between the door and the frame to which the door lock is attached (so-called dust), a hole is made in the door, and a tool for unauthorized unlocking such as a wire or string is inserted into the hole. Hook the tool for unauthorized unlocking on the thumb turn knob of the thumb turn attached to the indoor side of the door lock, rotate the thumb turn shaft in the unlocking direction, and retract the unlocked lock to unlock it. It is an illegal unlocking act.

  As a countermeasure against this, as shown in Japanese Patent Laid-Open No. 11-200678 (Patent Document 1), a thumb turn case on the indoor side is used as a cylinder and a thumb turn as a key is provided detachably. It is known that the key stopper (switch) is pushed out when pulling out.

According to the thumb turn of the above-mentioned patent document 1, even if the thumb turn is turned in the unlocking direction by using an unauthorized unlocking tool from the outside by pulling out the thumb turn (join key) in the locked state, Since the thumb turn cannot be rotated in the unlocking direction, unauthorized unlocking by turning the thumb turn can be prevented.
Japanese Patent Laid-Open No. 11-200678

However, the thumb turn of the above-mentioned Patent Document 1 is complicated and expensive with the same structure as the cylinder. Moreover, if the pull out pull the thumb-turn, since it is necessary to pull unplug, also inserted by holding down the key stopper (switch) as described above, there is a drawback-out pull disconnect, and the mail merge operation is troublesome.
The present invention solves the problem of the thumb turn of the above-mentioned Patent Document 1, and the structure of the thumb turn is not as complicated as a cylinder. Further, when pulling out the thumb turn, the knob is removed from the case body with the spring against the lock member. -out pull unplug outwardly against the urging force, because it is only inserting the knob body to the case body pull-out and mail merge operation when the plug is simple. Furthermore, providing a thumbturn for a safe door lock that can more reliably prevent unauthorized unlocking by turning the thumbturn, such as by preventing misuse of the knob, by realizing the thumbturn mishandling in a different key. Objective.

In order to achieve the above object, a thumb lock for a door lock according to claim 1 of the present invention includes a case body having a vacant space therein and a shaft fitting insertion hole, and one end side of the shaft fitting insertion hole of the case body. A knob having a shaft portion that is rotatably and removably inserted, and a knob connected to the shaft portion; provided on the other end side of the shaft insertion hole of the case body; and The operation member to which the shaft portion of the knob is connected, and the other end side of the shaft portion of the knob and the operation member so that the shaft portion of the knob and the knob and the operation member are rotated together. An engagement mechanism provided on the door , and when the thumb turn is not in use, the knob is pulled out to the outside and can be inserted in use .
An annular recess is formed in the circumferential direction of the shaft portion of the knob body at a position facing the vacant space of the case body, and the vacant space of the case body at a position above the annular recess is always in the shaft by a spring. three or more locking members which are biased to engage the annular recess parts and arranged radially at equal intervals on the circumference, at the time of non-use of the thumb-turn, the knob body spring for the locking member pull fastened securely to the outside against the urging force, characterized in that it is at the time of use are the Sashikomeru so.

  Here, the “operation member” to which the shaft portion of the knob is connected is connected to a lock mechanism (dead hub) housed in a lock case that is imbedded or embedded in the door, and interlocked with the rotation of the knob. Then, the lock rod is protruded or retracted through the lock mechanism portion to be locked or unlocked.

  Further, the “lock member” is not limited to the balls and pins shown in the embodiments, and can be appropriately changed in design.

  Furthermore, the “engagement mechanism” provided on the other end side of the shaft portion of the knob and the operation member is not limited to the shape shown in the embodiment, and can be appropriately changed in design.

  The thumb-turn for a door lock according to claim 2 realizes a thumb-turn difference in a key-different manner, and in the configuration of claim 1, the engaged portion as an engagement mechanism of the shaft portion of the knob A plurality of knobs with different parts, and the same number of operation members as the knobs with different engaging parts engaging with the engaged parts of the knobs. The body and the operation member can be selectively used as a pair in which the engaged portion of the knob and the engagement portion of the operation member can be detachably engaged.

According to the thumb turn for the door lock according to claim 1 of the present invention, an annular recess is formed in the circumferential direction of the shaft portion of the knob body having the shaft portion and the knob portion at a position facing the empty space of the case body. together, the check of the case body above the recess of the annular, three or more locking members which are biased into engagement in an annular recess of the shaft portion is always by a spring on the circumference and disposed radially at equal intervals, since at the time of non-use of the thumb-turn, the knob body pulls fastened securely to the outside against the urging force of the spring against the locking member, which in use are to Sashikomeru so, the thumb turn at the time of non-use it is only withdrawn from the case body of the knob body to the outside, there is no need to be the same complex structure as the cylinder so that the thumb of the Patent Document 1, moreover-out pull unplug by holding down the key stopper (switch), The plug必Since there is no, also it can be performed easily pull-out operation of the knob body with one hand.
At this time, if the knob is pulled out of the case body with the thumb turn locked (that is, the knob rotated in the locking direction), a tool for unauthorized unlocking such as a wire or string from the outdoor to the knob of the knob Even if it tries to hook, since the said knob is pulled out and does not exist, it cannot be unlocked illegally by turning the thumb turn. Therefore, unauthorized unlocking can be prevented.

  Further, in a state where the knob is pulled out from the case body in the thumb turn locked state, the lock member in the empty space of the case body is moved in the compression direction by the spring, and the lock member is inserted into the shaft of the case body. Since the hole is closed, the lock member prevents entry even if an unauthorized unlocking tool is attempted to enter from the entrance of the shaft insertion hole. Therefore, it is impossible to rotate the thumb turn, and unauthorized unlocking can be prevented.

Further, an annular recess is formed at a position facing the vacant space of the case body in the circumferential direction of the shaft portion of the knob body, and the vacant space of the case body at a position above the annular recess is always fixed by a spring. because are disposed radially at equal intervals of three or more locking members which are biased to engage the annular recess of the shaft portion on the circumference, fit the shaft of the case body the shaft of the knob body when mounted fitting inserted into insertion hole, the annular recess in the locking member formed on the shaft portion of the knob body is strongly pressed by the spring, it prevents the knob body from falling off from the case body.

In addition, the shaft part of the knob and the knob and the operation member are provided so as to be integrally rotated by engagement of an engagement mechanism provided on the other end side of the shaft part of the knob and the operation member. Therefore, when the knob part of the knob is normally rotated, the shaft part and the operation member are reliably rotated integrally, and the lock rod protrudes or retracts in conjunction with the rotation to lock or Unlocked.

  According to the thumb turn for the door lock according to claim 2, the engaging portion as the engaging mechanism of the shaft portion of the knob includes a plurality of knobs different from each other, and the engaging portion of the knob is related to the engaged portion. The same number of operation members as the above-mentioned knobs are provided, and the knobs and the operation members are the engagement parts of the knobs and the engagement parts of the operation members. Since those that can be detachably engaged can be selected and used as a pair, there are a plurality of pairs of engagement mechanisms having different configurations composed of an engaged portion and an engaging portion. It is possible to realize a thumb-turn mishandling in a key-like manner, prevent unauthorized use of the pick-up body, prevent unauthorized unlocking by turning the thumb-turn more reliably, and provide a safer thumb-turn for a door lock.

An embodiment of the present invention will be described below with reference to FIGS.
Reference numeral 1 denotes a door lock attached to the door A. The door lock 1 includes a lock casing 3 and a hub 4 for extending and retracting the lock casing 3 and a retracting operation mechanism such as a spring for click motion. 2, a cylinder 10 provided on the outdoor side, a thumb turn 20 provided coaxially with the cylinder 10 on the indoor side, and the like. As is well known, the lock rod 3 can be locked or unlocked by projecting or retreating the cylinder 10 by using the key lock or by rotating the thumb turn 20.

  In FIG. 2, 5 is a lock case mounting screw, and 6 is a front plate of the lock case 2. In FIGS. 1, 4 and 5, reference numeral 21 denotes a screw for attaching the case body 30 to the door A. Various methods of attaching the thumb turn are known, but the present application does not matter how to attach the thumb turn.

As shown in FIG. 3 , the thumb turn 20 has a case body 30 having a hollow 35 inside and a shaft fitting insertion hole 36, and is rotatable from one end side of the shaft fitting insertion hole 36 of the case body 30. A knob 40 having a shaft portion 41 inserted and a knob 42 connected to the shaft portion 41, provided on the other end side of the shaft insertion hole 36 of the case body 30, and the knob 40 And an operating member 50 to which the shaft portion 41 is connected.

  The case body 30 closes the outer case 31 having a substantially dish-shaped cross section, the inner case 32 having a substantially dish-shaped cross section fitted to the outer case 31, and the openings 33 of the inner and outer cases 32, 31. It consists of a back cover 34. In a state where the outer case 31, the inner case 32, and the back cover 34 are closed, a vacant space 35 is formed in the inside, and a central portion of the inner and outer cases 32, 31 and the back cover 34 is As shown in FIG. 3, a shaft fitting insertion hole 36 is formed from one end side (right end side) to the other end side (left end side) in FIG.

The knob 40 includes a shaft portion 41 that is inserted from one end side of the shaft insertion hole 36 of the case body 30, and a knob portion 42 that is continuously formed integrally with the shaft portion 41.
The knob 42 is projected to the inside of the room, and the knob 42 is rotated in the locking direction or the unlocking direction by hand, and the lock case 42 is connected via the operation member 50 connected to the shaft 41. The hub 4 housed in 2 is rotated so that the lock rod 3 protrudes or retracts to enter a locked or unlocked state.

  The operation member 50 has a flange 51 formed on one end side (right end side in FIG. 3), and the flange 51 is formed in a hole edge portion of the shaft fitting insertion hole 36 of the back cover 34 of the case body 30. It fits into the part 34a. Further, a shaft insertion hole 52 is formed from the flange 51 toward the other end side (left end side in FIG. 3), and the other end side (left end in FIG. 3) of the shaft portion 41 of the knob 40 is formed in this shaft insertion hole 52. Side) is fitted. The other end side (the left end side in FIG. 3) of the operation member 50 is engaged with the hub hole 4 a of the hub 4 of the lock case 2.

In the above configuration, an annular recess 43 is formed at a position facing the empty space 35 of the case body 30 in the circumferential direction of the shaft portion 41 of the knob 40. Further, the empty chamber 35 of the case body 30 at a position above the annular recess 43, Ya biased ball as constantly by a spring 61 such as a coil spring engaged with the annular recess 43 of the shaft portion 41 A lock member 60 such as a pin is provided. The strength of the spring 61 is preferably increased within a range that does not hinder the knob 40 when it is inserted and removed against the urging force of the spring against the lock member .

In the present embodiment, four balls as the lock member 60 are arranged at equal positions in the circumferential direction of the annular concave portion 43 of the shaft portion 41, but for the purpose of preventing the knob 40 from falling off, the locking member 60 serving as ball 3, it is preferable for five such three or more number.

  On the other hand, the knob 40 and the operation member 50 are provided so as to be integrally rotated by engagement of an engagement mechanism 70 provided on the other end side of the shaft portion 41 of the knob 40 and the operation member 50. is there.

  That is, as the engaging mechanism 70, in this embodiment, as shown in FIGS. 3, 6, and 7, concave engaged portions 45, 45 are provided on the diameter line on the other end side of the shaft portion 41 of the knob 40. In addition, projecting engagement portions 55 and 55 are formed on the inner wall surface of the shaft insertion hole 52 of the operation member 50 so as to face the engaged portions 45 and 45. Therefore, when the shaft portion 41 of the knob 40 is inserted into the shaft insertion hole 52 of the operation member 50, the engaging portion 55 can be inserted into the engaged portion 45, and The shaft insertion hole 52 can be inserted and removed. When the knob 40 is rotated in a state where the engaged portion 45 and the engaging portion 55 are fitted, the engaged portion 45 and the engaging portion 55 are engaged in the rotating direction. Therefore, the operation member 50 is rotated integrally with the knob 40.

  In addition, the engaging mechanism 70, that is, the engaged portion 45 of the shaft portion 41 and the engaging portion 55 of the operation member 50, rotate the knob 42 in the unlocking direction with both 45 and 55 engaged. In this state, the knob 42 of the knob 40 is vertically oriented (see the solid line 42 in FIGS. 1, 2 and 3), and when the knob 42 is rotated in the locking direction, the knob 42 is horizontally oriented ( (See the imaginary line 42 in FIGS. 1 and 2). Therefore, it is convenient that it can be determined that the thumb turn 42 is in the unlocked state when the knob 42 is in the vertical direction, and that the knob 42 is in the locked state when the knob 42 is in the horizontal direction, at a glance.

Further, as described above, the knob 40 is pulled out outward from the case body 30 and the operation member 50 against the urging force of the spring 61 against the lock member 60 on the indoor side. When the knob 40 is pulled out from the case body 30, the knob 40 is gripped by hand and rotated in the locking direction to project the lock rod 3 through the operation member 50 to be in a locked state. The body 40 may be pulled out against the pressing force to the annular recess 43 of the shaft portion 41 of the lock member 60 by the spring 61. If it does so, since the knob | pick body 40 which should hook the tool for unauthorized unlocking from the outdoor is pulled out and does not exist, the unauthorized unlocking by thumb turn can be prevented completely.

Next, the usage method or operation of the thumb turn 20 of the present invention will be described below.
1 is a front view of the door lock 1 using the removable thumb turn 20 of the present invention as viewed from the indoor side, and FIG. 2 is a left side view of FIG. When inserted, as indicated by a solid line, the knob 42 is in a vertical state and the lock rod 3 is in an unlocked state in which it is retracted. When the knob 42 is gripped by hand from this unlocked state and rotated in the locking direction so that the knob 42 is in a horizontal state as indicated by the phantom line, the operation member 50 is placed in the lock case 2 as described above. When the hub 4 is operated, the lock rod 3 protrudes to enter a locked state. Since the lock member 60 is strongly pressed by the spring 61 against the annular recess 43 of the shaft portion 41, the knob 40 is prevented from falling off the case body 30. Further, since the pressing force by the urging force of the spring 61 is acting on the lock member 60 when the knob portion 42 is rotated, it is necessary to overcome the frictional resistance due to this pressing force when rotating .

In addition, when the knob 40 is pulled out from the case body 30 in the locked state, there is no knob 40 to which an unauthorized unlocking tool should be hooked from the outside as described above. Cannot lock correctly. Therefore, in this case, an incorrect answer due to the thumb turn can be surely prevented. In addition, when the knob 40 is pulled out from the case body 30, it is only necessary to grip the knob 42 from the indoor side and pull it out against the pressing force to the annular recess 43 of the shaft 41 by the spring 61 of the lock member 60. Therefore, the pulling-out operation of the knob 40 is easy .

When the knob 40 is pulled out from the case body 30 in the locked state, the lock members 60, 60, 60, 60 in the empty space 35 of the case body 30 are springs 6 as shown in FIG.
1, 61, 61, 61 are moved in the axial direction (compression direction) of the shaft insertion hole 36, and the lock members 60 are in contact with each other to block the shaft insertion hole 36. Accordingly, the unauthorized unlocking tool is prevented from entering from the entrance of the shaft fitting insertion hole 36, and the rotation of the operation member 50 is prevented, so that the lock rod 3 cannot be protruded.

  From the state of FIG. 5 in which the knob 40 is pulled out from the shaft fitting insertion hole 36 of the case body 30, the shaft portion 41 of the knob 40 is inserted into the shaft fitting insertion hole 36 as shown in FIG. When the taper surface 46 of the shaft portion 41 is pressed against the entrance of the shaft fitting insertion hole 36 of the case body 30 and pushed in, the shaft portion 41 is advanced while pushing up the lock member 60 against the urging force of the spring 61. The engaged portion 45 of 41 and the engaging portion 55 of the operation member 50 are engaged. Therefore, when the knob 40 is rotated, the knob 40 and the operation member 50 are rotated together.

Modifications etc.

  The lock member 60 of the present invention is not limited to the spherical ball shown in the embodiment, and can be appropriately changed in design. For example, as shown in FIG. 8, the cross section may be substantially conical, and the concave portion 62 that accommodates the spring 61 may be formed in the upper part, or the cross section may be a columnar shape, etc.

  The shaft portion 41 and the knob portion 42 of the knob 40 are integrally formed in the embodiment, but both 41 and 42 are formed separately and integrally by welding, a fitting method, an engagement direction, or the like. Including those formed.

  The shapes of the case body 30, the knob body 40, and the operation member 50 are not limited to those shown in the drawings, and can be appropriately changed in design.

As an engagement mechanism 70 between the engaged portion 45 of the shaft portion 41 of the knob 40 and the engaging portion 55 of the operation member 50, in the embodiment, as shown in FIG. However, by adopting a plurality of sets of engagement mechanisms 70 having different shapes, it is possible to realize a difference in thumb turn by key. In this way, the misuse of the knob 40 can be prevented by others, and when the knob 40 or the operating member 50 in use is to be replaced due to damage or the like, the new knob 40 or the operating member is used. There is an advantage that it can be replaced with 50.

Specific examples of the mishandling are illustrated in FIGS. 9A, 9B, and 9C.
That is, (A) of the figure forms the engaged portions 45, 45, 45 of the shaft portion 41 in three places, and the two engaged portions 45, 45 have a substantially flat plate-like cutting surface, One engaged portion 45 has a recessed surface that is substantially a flat plate. The operation member 50 is opposed to the engaged portions 45, 45, 45 so that the two engaging portions 55, 55 are substantially flat projection surfaces, and the one engaging portion 55 is substantially The projection surface is in contact with the engaged portion 45, which is a recessed surface close to a flat plate.

  9B shows that the three engaged portions 45, 45, 45 and the three engaging portions 55, 55, 55 are almost similar to those having the shape described in (A). However, as compared with the case of (A), the respective formation positions are made different so as not to be compatible with those of (A).

  Further, (C) in FIG. 9 is common in that the engaged portions 45, 45, 45 and the engaging portions 55, 55, 55 are formed at three positions, compared with (A) and (B). However, for the above purpose, the formation position and shape thereof are different from those of (A) and (B).

That is, for example, the Symbol view 9 (A), since the engagement to that of mechanism 70, from those of the engagement mechanism 70 in FIG. 7, different structures from each other of (B), (C), 4 types This means that the misunderstanding is realized.

9A, 9B, 7A, 7B, 7A, 7B, 7A, 7B, 7A and 7B, an example of a knob difference is described. The knobs 45 to be engaged as the engagement mechanism 70 of the shaft portion 41 of the knob 40 are different from each other. Four types of bodies 40 are provided.
In addition, the same number of operation members 50 as the engagement members 55 that are engaged with the engaged portions 45 of the knob 40 are provided.
As the knob 40 and the operation member 50, four types can be selected and used as a pair in which the engaged portion 45 of the knob 40 and the engagement portion 55 of the operation member 50 can be detachably engaged. It is like that.

In addition to FIGS. 7 and 9 (A), 9 (B), and 9 (C), examples of the mishandling include a shape that cannot be rotated by an unauthorized unlocking tool, and the knob 40 is normally rotated from the indoor side. Any shape can be adopted as long as the shaft 41 and the operation member 50 can rotate together when the shaft 41 and the operation member 50 can rotate together.
That is, the engagement mechanism 70 is not limited to the shape of FIG. 7 of this embodiment and the shapes of FIGS. 9A, 9B, and 9C, and the design can be changed as appropriate. For example, the shape of the shaft portion 41 of the knob 40 is a shape having a direction that can be engaged only in a certain direction when the shaft portion 41 is engaged when the cross section is an isosceles triangle, rectangle, pentagon, etc. If it is. In addition, the inner peripheral wall of the operation member 50 facing the shape of the shaft portion 41 can be selected so as to receive and engage the shape body of the shaft portion 41.

  The present invention can be applied not only to a lock of a building door but also as a thumb turn used for a lock of an automobile or other closing body.

It is the front view which looked at the door lock using the removable thumb turn of the Example of this invention from the room inner side. It is a left view of FIG. It is an AA line cross-sectional enlarged view of FIG. FIG. 4 is a sectional view taken along line BB in FIG. 3. It is sectional drawing of the state which pulled out the knob in FIG. It is a front view of a knob. It is CC sectional view taken on the line of FIG. It is sectional drawing of the modification of the lock member which attached the spring. The modification of the to-be-engaged part of a knob and the engaging part of an operation member is shown, respectively, (A) is sectional drawing of a 1st modification, (B) is sectional drawing of a 2nd modification, (C ) Is a cross-sectional view of a third modification.

DESCRIPTION OF SYMBOLS 1 Door lock 2 Lock case 3 Lock bowl 10 Cylinder 20 Thumb turn 30 Case body 35 Empty room 36 Shaft fitting insertion hole 40 Knob body 41 Shaft part 42 Knob part 43 Annular recessed part 45 Engagement part 50 Operation member 55 Engagement part 60 Lock member 61 Spring 70 Engagement mechanism

Claims (2)

A case body having a vacant space inside and a shaft fitting insertion hole, a shaft portion that is rotatably and removably inserted from one end side of the shaft fitting insertion hole of the case body, and a shaft portion connected to the shaft portion A knob having a knob, an operation member provided on the other end side of the shaft fitting insertion hole of the case body and connected to the shaft of the knob, and a shaft and a knob of the knob. And an engaging mechanism provided on the other end side of the shaft portion of the knob and the operation member so that the knob and the operation member are rotated together, and the knob is outward when the thumb turn is not used. It is a thumb turn for a door lock that can be pulled out and inserted when used ,
An annular recess is formed in the circumferential direction of the shaft portion of the knob body at a position facing the vacant space of the case body, and the vacant space of the case body at a position above the annular recess is always in the shaft by a spring. three or more locking members which are biased to engage the annular recess parts and arranged radially at equal intervals on the circumference, at the time of non-use of the thumb-turn, the knob body spring for the locking member pull fastened securely to the outside against the urging force, thumb turn for the door lock, characterized in that at the time of use are the Sashikomeru so.
While the engaged portion as the engaging mechanism of the shaft portion of the knob is provided with a plurality of knobs different from each other,
The same number of operation members as the above knobs are provided with different engaging parts as engaging mechanisms that engage with the engaged parts of the knobs,
2. The knob according to claim 1, wherein the knob and the operating member can be selectively used as a pair in which the engaged portion of the knob and the engaging portion of the operating member can be detachably engaged. Thumb turn for door lock.

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