JP4530802B2 - Thumb turn cover - Google Patents

Description

  The present invention relates to a thumb turn cover that covers an existing thumb turn so as to be exposed and makes it difficult to perform an illegal thumb turn operation.

  For example, there is a type of locking device with a thumb turn that attaches the case by exposing it to the indoor side surface of the door. In this locking device, a cylinder lock is provided on the outdoor side of the door, and a rotary thumb turn is provided on the indoor side of the door. For example, a dead bolt, which is a lock member, is provided in a lock box provided in the case or the door so as to freely advance and retract. Then, by inserting a key into the keyhole of the cylinder lock exposed to the outside and rotating it, the dead bolt is advanced and retracted, and the strike provided on the door opening frame is locked and unlocked. . Further, from the indoor side, the dead bolt is advanced and retracted only by rotating the thumb turn, and the locking and unlocking can be easily performed. In addition to the thumb turn that can be manually unlocked and unlocked, there is also an electric thumb turn that is locked by electric rotation in conjunction with the door closing operation.

  However, in recent years, a crime (so-called thumb turn) has been introduced in which a wire or the like is inserted through a small slot made by a post slot or a machine tool, and is locked and rotated by a thumb turn that is easy to rotate. Rotation) is increasing. For example, a thumb-turn security cover that covers the thumb-turn with the case has been proposed as a means to prevent the thumb-turn from being locked and rotated, such as an electric thumb-turn. When the frequency of performing is low, it may be always covered with a cover.

  However, the conventional thumb-turn security cover that covers the thumb-turn together with the case has a structure in which the pedestal is fixed around the case of the existing thumb-turn with double-sided adhesive tape, etc. A structure in which a seat plate is sandwiched between them and a cover is opened and closed with respect to these pedestals and seat plates is common, that is, a simple structure is retrofitted, so a crime prevention effect can be easily obtained Although there is a problem, there is a problem that it can be easily opened by inserting a criminal tool into the gap between the pedestal and the cover, or can easily fall off due to an impact from the side. And with the structure that covers the existing thumb turn together with the case, it is difficult to reduce the size, the cost is high, and there is no sense of incongruity that can be a part of the indoor interior, for example, the design uniformity with the door and other metal fittings etc. It became difficult to match the design. Further, in the structure in which the seat plate is sandwiched between the thumb turn ring and the door indoor surface, the assembling workability is poor and there is a possibility that sufficient attachment strength cannot be obtained. Furthermore, with the conventional thumb turn security cover, the thumb turn knob is obscured, making it impossible to see the direction of the thumb turn knob. The operability of locking / unlocking was reduced.

  The present invention has been made in view of the above situation, makes it difficult to turn and destroy a thumb turn with a criminal tool, can provide high crime prevention performance, can realize low cost, good assembly workability, operability, and appearance It is to obtain a thumb turn cover that is easy to design.

Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments.
The thumb turn cover 100 according to claim 1 of the present invention is fixed to the mounting plate 19 of the existing thumb turn, covers the internal mechanism 27 of the existing thumb turn, exposes the thumb turn knob 29, and opens the door indoors along the outer peripheral edge 11a. A thumb turn seat 11 having a return piece 33 standing perpendicular to the surface 17a;
The upper part of the thumb turn seat 11 is supported by a swingable shaft 39 parallel to the door indoor surface 17a and swingable so as to be openable and closable. The outer peripheral edge 13a is placed inside the return piece 33 at the closed position. Covering the thumb-turn seat 11 together with the thumb-turn knob 29, exposing the thumb-turn knob 29 and the thumb-turn seat 11 in the open position, and having a recess 37 on the surface on the swing end side;
It is formed in a substantially Z shape with a shaft part 45 in the middle part, is rotatably supported in the cover 13, a button 47 is formed on one end side across the shaft part 45, and the other end side A locking claw 49 having a locking surface 53 is formed at the tip of the cover 13 facing the opening direction of the cover 13, and the button 47 at the one end can be pushed from the recess 37 of the cover 13. The locking claw 49 at the other end is positioned so that the locking surface 53 faces the locking portion 55 provided on the thumb turn seat 11 and meshes with each other to be locked. When,
Comprising
In the opening direction of the cover 13, the locking claw 49 of the lock lever 15 and the locking part 55 of the thumb turn seat 11 are engaged with each other, and the locking force is increased by receiving a reaction force from the locking part 55. The locking surface 53 is slid in the direction to be locked,
By pushing the button 47 of the lock lever 15 in the same direction as the cover closing direction, the lock lever 15 swings around the shaft portion 45, and the locking claw 49 engages with the locking portion 55. It is characterized by releasing.

In the thumb turn cover 100, when the cover 13 is closed, the outer peripheral edge 13 a of the cover 13 is overlapped and fitted to the return piece 33 of the thumb turn seat 11. Thereby, a gap for inserting a tool or the like does not occur between the thumb turn seat 11 and the cover 13. Further, the so-called overlapping structure in which the outer peripheral edges overlap each other increases the yield strength in the door indoor surface direction. And the existing thumb turn is covered only with the cover single item, and the structure becomes simple.
Further, since the cover 13 is supported on the upper portion of the thumb turn seat 11 via a lateral shaft 39, the cover 13 is greatly opened so as to be fully opened upward.
Furthermore, since the button 47 is disposed in the concave portion 37 and the concave portion 37 is pushed in the same direction as the cover closing direction, an operation with a finger from the indoor side becomes easy, and an illegal button push using a tool or the like becomes difficult. . In addition to this, the locking claw 49 of the lock lever 15 acts in a direction to increase the locking allowance depending on the external force in the opening direction of the cover 13. Therefore, in an unauthorized opening method that simply attempts to open the cover 13. It becomes more difficult to unlock.

The thumb turn cover 100 according to claim 2, wherein a plurality of the concave portions 37 are independently formed,
A plurality of the lock levers 15 are provided corresponding to the respective recesses 37.

  In this thumb turn cover 100, there are a plurality of lock levers 15, that is, they cannot be released unless a plurality of buttons 47 are pressed simultaneously. For this reason, it is possible to make the unauthorized operation more difficult and improve the crime prevention.

  The thumb turn cover 100 according to claim 3 is characterized in that a biasing means for biasing the cover 13 in the closing direction is provided across the thumb turn seat 11 and the cover 13.

  In the thumb turn cover 100, even if the cover 13 is unlocked illegally by the lock lever 15, the cover 13 remains in the closed state, that is, the push operation of the button 47 and the cover 13 The operation of grabbing and holding is necessary, and the thumb turn operation becomes difficult by an unauthorized method.

  The thumb turn cover 100 according to claim 4 is provided with an opening / closing position restricting means 63 for holding the cover 13 in the closed position and the open position over the thumb turn seat 11 and the cover 13. Features.

  In the thumb turn cover 100, when the thumb turn knob 29 is not required to operate, the cover 13 is restricted to the closed state, and when the thumb turn knob 29 is operated, the cover 13 is held open.

  The thumb turn cover 100 according to claim 5 is characterized in that a portion 65 of the cover 13 covering the knob 29 of the existing thumb turn is made of a transparent member that can visually recognize the knob 29.

  In the thumb turn cover 100, the direction of the thumb turn knob 29 can be visually recognized through the transparent portion 65 without opening the cover 13 even in the cover locked state. In other words, it is possible to easily confirm whether the locked state or the unlocked state is the same as the thumb turn without the cover 13.

According to the thumb turn cover of the first aspect of the present invention, the thumb turn seat having the return piece along the outer peripheral edge is engaged with the existing thumb turn and attached to the indoor surface of the door. A cover that covers the thumb-turn seat with the knob is provided so as to be swingable via a horizontal shaft, and when closed, the outer periphery of the cover is overlapped on the inner side of the return piece so that the gap between the thumb-turn seat and the cover With the so-called overlapping structure that can make it difficult to pry by inserting tools etc. and the outer peripheral edges overlap each other, it is difficult to cause rattling in the door indoor surface direction, increasing the fitting strength, Breaking with a tool or the like can be made difficult. As a result, high crime prevention properties can be imparted. And since the existing thumb turn is covered only by a single cover, the minimum limit design that matches the internal mechanism can be easily performed, the structure is simplified, the cost of parts is reduced, and good assembly work is performed. In addition, an exterior design that can be part of an interior interior such as a house interior or a hotel room interior can be easily achieved.
Further, since the cover is largely opened upward at the upper part of the thumb turn seat via the lateral shaft, it is possible to realize good thumb turn operability without obstructing the thumb turn operation.
In addition, by pushing the button protruding into the recess in the cover closing direction, the lock lever can be released and the cover can be opened, so the finger can be easily pushed in from the indoor side, In the case of an illegal button press using a tool or the like, the release is difficult because the button is located in the recess. Moreover, the locking claw of the lock lever acts in the direction of increasing the locking allowance depending on the external force in the opening direction of the cover, that is, it is further locked against the action of trying to open only the cover, The crime prevention performance can be further enhanced while ensuring good operability.

  According to the thumb turn cover of the second aspect, the plurality of recesses are provided independently on the cover, and the lock lever is provided corresponding to each recess, so that the cover is unlocked unless a plurality of buttons are pressed simultaneously. It cannot be done, and crime prevention can be further improved.

  According to the thumb turn cover of the third aspect, since the urging means for urging the cover in the closing direction is provided, the cover remains closed even when the cover is unlocked by the lock lever. Therefore, it is possible to make it difficult to perform an illegal thumb turn with a tool or the like.

  According to the thumb turn cover of the fourth aspect, since the opening / closing position restricting means for holding the cover in the closed position and the open position is provided, the cover is restricted to the closed state when the thumb turn operation is not required. In addition to improving the operability, the cover can be kept open during thumb turn operation, and the operability can be improved by eliminating interference with the cover.

  According to the thumb turn cover of the fifth aspect, since the transparent member is used for the part of the cover that covers the knob of the existing thumb turn, even in the cover lock state, the direction of the thumb turn knob is not passed through the transparent part without opening the cover. Can be visually confirmed, and the locked / unlocked state of the door by the lock box can be easily confirmed, thereby enhancing convenience.

Hereinafter, preferred embodiments of a thumb turn cover according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a longitudinal sectional view of a thumb turn cover according to the present invention.
The thumb turn cover 100 according to the present embodiment has a thumb turn seat 11, a cover 13, and a lock lever 15 as main components.

2 is an enlarged cross-sectional view of a main part in the vicinity of the lock lever of FIG.
The thumb turn seat 11 is fixed to a mounting plate 19 of an existing thumb turn provided on the indoor surface 17 a of the door 17. The mounting plate 19 is screwed to the indoor surface 17a by screws or bolts (not shown). The thumb turn seat 11 locks the claw 21 formed on the lower inner wall in the locking hole 23 of the mounting plate 19, and the upper portion is screwed to the mounting plate 19 with a screw (not shown) inserted through the insertion portion 25. . The thumb turn seat 11 covers the internal mechanism 27 of the existing thumb turn. Moreover, the shaft penetration base 31 which exposes the thumb turn knob 29 is provided.

FIG. 3 is a front view of the cover shown in FIG.
The thumb turn cover 100 is configured such that the thumb turn seat 11 and the thumb turn knob 29 are covered with the cover 13 by covering the thumb turn seat 11 with the cover 13.

FIG. 4 is a cross-sectional view of the thumb turn seat shown in FIG.
The thumb turn seat 11 is formed with a return piece 33 erected perpendicularly to the indoor surface 17a along the outer peripheral edge 11a. A gap 35 is formed between the side surface 11 b of the thumb turn seat 11 and the return piece 33.

  As shown in FIG. 3, the cover 13 has recesses 37, 37 on the lower end side serving as the rocking end of the surface. There may be one or more recesses 37. In the present embodiment, two concave portions 37, 37 are provided. The cover 13 is supported by the upper part of the thumb turn seat 11 so as to be swingable through a shaft 39 parallel to the indoor surface 17a and laterally. The shaft 39 protrudes inward from the left and right of the upper inner wall of the cover 13 and is inserted into a bearing hole 41 (see FIG. 1) provided at a corresponding position of the thumb turn seat 11.

  1, the cover 13 covers the thumb turn seat 11 together with the thumb turn knob 29 with the outer peripheral edge 13a overlapped with the inside of the return piece 33 at the closed position shown by the solid line in FIG. 1, and the thumb turn knob 29 at the open position shown by the one-dot chain line in FIG. And the thumb turn seat 11 is exposed.

FIG. 5 is a rear view of the cover shown in FIG. 3 as viewed from the back side.
The cover 13 is provided with two lock levers 15 corresponding to the respective recesses 37. 2 is rotatably supported by a plurality of support plates 43 protruding in parallel to the lower inner side of the cover 13 shown in FIG. The lock lever 15 is formed in a substantially Z shape in the present embodiment, a button 47 is formed on one end side with a shaft portion 45 in the middle portion, and a locking claw 49 is formed on the other end side.

  The button 47 protrudes from the button display hole 51 formed in the recess 37 to the surface side of the cover 13. Even in the protruding state, the button 47 does not protrude from the recess 37 as shown in FIG. That is, the button 47 is pushed by a fingertip inserted into the recess 37.

  The locking claw 49 is formed in a bowl shape, and a step 53 as a locking surface is formed at the tip thereof. The step 53 is locked to a locking portion 55 having a step formed on the thumb turn seat 11. It is like that. A helical spring 57 is extrapolated to the shaft 45, and one end of the helical spring 57 is engaged with an engaging piece 59 of the lock lever 15, and the other end is an engaging groove 61 of the cover 13 (see FIG. 5). It is in contact with. The lock lever 15 is urged in the clockwise direction of FIG. 2 by the helical spring 57, and is normally arranged so that the button 47 protrudes into the recess 37 and the locking claw 49 is locked to the locking portion 55. .

  Thereby, the button 47 protrudes in the recessed part 37 so that it can be pushed in. When the button 47 is pressed, the lock lever 15 swings around the shaft portion 45 and is released from the locking claw 49. The locking means between the lock lever 15 and the thumb turn seat 11 has a stepped portion that is opposed to the locking claw 49 and the locking portion 55 so that the locking lever 15 and the thumb turn seat 11 engage with the opening of the cover 13. When the reaction force is received from the stop portion 55, it acts in the direction in which the locking force between the step portions increases. In addition, the locking means between the lock lever 15 and the thumb turn seat 11 is changed to a stepped portion, and slides in a direction in which the locking margin increases by receiving a reaction force from the locking portion 55 as the cover 13 opens. It may be configured as a slope and may be a locking surface.

  Since the cover 13 is formed with two recesses 37 independently, and the lock lever 15 is provided corresponding to each of the recesses 37, 37, the locking claw 49 is provided unless the two buttons 47, 47 are pushed in simultaneously. , 49 is not released. That is, the lock levers 15 are respectively locked and must be operated at the same time, so that crime prevention is further enhanced.

  The thumb turn cover 100 is provided with opening / closing position restricting means 63 shown in FIG. 1 across the thumb turn seat 11 and the cover 13. The open / close position restricting means 63 holds the cover 13 in the closed position and the open position. That is, when the operation is unnecessary, the cover 13 is restricted to the closed state, and when the operation is performed, the cover 13 is held in the open state. Thereby, when the operation is unnecessary, the cover 13 is restricted to the closed state to enhance the crime prevention performance, and at the time of the operation, the cover 13 is held in the open state to eliminate the interference with the cover 13, thereby rotating the thumb turn knob 29. Can be improved. The opening / closing position restricting means 63 may be composed of two protrusions 63a and 63b protruding from the inner wall surface of the cover 13 at a predetermined position and one not-shown insertion recess formed on the opposite surface of the thumb turn knob 29. it can.

  In addition, the cover 13 is made of a transparent member in which the thumb turn knob 29 is visible at a portion 65 covering the thumb turn knob 29. Therefore, even when the cover 13 is in the locked state, the thumb turn knob 29 can be visually recognized through the transparent portion 65 without opening the cover 13. Thereby, the locked / unlocked state of the door by a lock box can be confirmed easily, and the convenience can be improved.

Next, the operation of the thumb turn cover 100 configured as described above will be described.
6 is an enlarged cross-sectional view of the main part in the vicinity of the lock lever in the closed state, FIG. 7 is an enlarged cross-sectional view of the main part in the vicinity of the lock lever in the push-in state, FIG. 8 is a side view of the thumb turn cover in the open state, and FIG. 8 is a front view of FIG. 8, and FIG. 10 is an enlarged cross-sectional view of a main part showing a process in which the lock lever returns to the locked state.

  As shown in FIG. 6, in the thumb turn cover 100, when the cover 13 is closed, the outer peripheral edge 13 a of the cover 13 is overlapped and fitted to the return piece 33 of the thumb turn seat 11. Thereby, a gap for inserting a tool or the like does not occur between the thumb turn seat 11 and the cover 13. Further, the so-called overlapping structure in which the outer peripheral edges overlap each other increases the yield strength in the direction parallel to the door indoor surface or the direction rotating the thumb turn knob.

  In this cover closed state, the locking claw 49 of the lock lever 15 is locked to the locking portion 55, and if the cover 13 is simply swung in the opening direction, the stepped portions are engaged with each other and stronger locking is achieved. It becomes a state. Further, the button 47 protruding from the button exposing hole 51 is accommodated in the concave portion 37 and cannot be pushed in by a rod having a diameter larger than the concave portion 37 or a tip-shaped rod that cannot enter the concave portion 37, for example.

  On the other hand, in order to operate the thumb turn knob 29, as shown in FIG. 7, the button 47 in the recess 37 is pushed with a finger. Then, the lock lever 15 is rotated counterclockwise in the figure against the urging force of the helical spring 57, and the locking claw 49 is disengaged from the locking portion 55, and the engagement between the lock lever 15 and the thumb turn seat 11. The stop is released. At this time, the two buttons 47 are pushed in at the same time, and in this state, the cover 13 is opened in the opening direction. That is, it is an operation with both hands that two fingers 47 and 47 are pushed in by using two fingers of one hand at the same time, and the cover 13 is grasped and held with the other hand.

  When the cover 13 is fully opened, as shown in FIG. 8, the cover 13 is held in the fully opened position by the opening / closing position restricting means 63. As a result, as shown in FIG. 9, the thumb-turn knob 29 is exposed on the substantially entire surface together with the thumb-turn seat 11, and a satisfactory thumb-turn operation is possible in which the fingers do not interfere with the cover 13.

  When the cover 13 is closed after a predetermined turning operation of the thumb turn knob 29, the holding of the opening / closing position restricting means 63 is first released, and the cover 13 is put on the thumb turn seat 11 again. When the locking claw 49 of the lock lever 15 contacts the corner of the locking portion 55 of the thumb turn seat 11, the cover 13 counterclockwise against the biasing force of the helical spring 57 as shown in FIG. When the latching claw 49 is rotated and passes over the corner portion and coincides with the latching portion 55, the latching claw 49 enters and latches into the latching portion 55 by the biasing force of the helical spring 57. It becomes a state. At the same time, the outer peripheral edge 13 a of the cover 13 overlaps with the inside of the return piece 33 of the thumb turn seat 11 again.

  Therefore, according to the thumb turn cover 100, the thumb turn seat 11 having the return piece 33 along the outer peripheral edge 13a is engaged with the existing thumb turn and attached to the door indoor surface 17a. Since the cover 13 covering the thumb turn seat 11 together with the thumb turn knob 29 is provided so as to be swingable through a lateral shaft 39, the outer peripheral edge 13a of the cover 13 is overlapped on the inner side of the return piece 33 when closed. The structure that can make it difficult to pry by inserting a tool or the like into the gap between the seat 11 and the cover 13 and the outer peripheral edges overlap (overlapping) each other causes rattling in the door indoor surface direction. It is difficult to increase the fitting strength and make it difficult to break with a criminal tool. As a result, high crime prevention properties can be imparted.

  And since the existing thumb turn is covered only by the single cover, the minimum limit design matched to the internal mechanism 27 can be easily performed, the structure is simplified, the parts cost is reduced, and the assembly is good. Workability can be realized, and an exterior design that can be part of indoor interiors such as house interiors can be easily achieved.

  Further, since the cover 13 is greatly opened at the top of the thumb turn seat 11 so as to be fully opened upward via the lateral shaft 39, the thumb turn knob 29 is not obstructed and a good thumb turn operability can be realized. . Further, by pushing the button 47 projected in the recess 37 in the cover closing direction, the lock lever 15 is released and the cover 13 can be opened, so that the pushing operation with the finger from the indoor side is easy. On the other hand, in the case of an illegal button press using a tool or the like, the release can be made difficult because the button 47 is located in the recess.

  In addition, the locking claw 49 of the lock lever 15 acts in the direction of increasing the locking margin depending on the external force in the direction in which the cover 13 is opened, so that the crime prevention performance can be further enhanced while ensuring good operability.

  The thumb turn cover according to the present invention may be configured such that a biasing means for biasing the cover 13 in the closing direction is provided across the thumb turn seat 11 and the cover 13. According to such a configuration, even if the cover 13 is unlocked illegally by the lock lever 15, the cover 13 is maintained in the closed state, and it is difficult to perform a thumb turn operation by an unauthorized method.

It is a longitudinal cross-sectional view of the thumb turn cover which concerns on this invention. It is a principal part expanded sectional view of the lock lever vicinity of FIG. It is a front view of the cover shown in FIG. It is a cross-sectional view of the thumb turn seat shown in FIG. It is the rear view which looked at the cover shown in FIG. 3 from the back side. It is a principal part expanded sectional view of the lock lever vicinity of a closed state. It is a principal part expanded sectional view of the lock lever vicinity of a button pushing state. It is a side view of the thumb turn cover of a cover open state. It is a front view of FIG. It is a principal part expanded sectional view showing the process in which the lock lever returned to the latching state.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Thumb turn seat 11a, 13a ... Outer periphery 13 ... Cover 15 ... Lock lever 17a ... Door indoor surface 19 ... Mounting plate 27 ... Internal mechanism 29 ... Thumb turn knob 33 ... Returning piece 37 ... Recessed part 39 ... Shaft 47 ... Button 49 ... Engagement Stopper 55 ... Locking part 63 ... Opening / closing position restricting means 65 ... Cover part covering the knob 100 ... Thumb turn cover

Claims (5)

A thumb turn seat fixed to the mounting plate of the existing thumb turn, covering the internal mechanism of the existing thumb turn, exposing the thumb turn knob, and having a return piece standing perpendicular to the door indoor surface along the outer peripheral edge;
The thumb turn knob is supported at the upper part of the thumb turn seat so as to be swingable through a horizontal axis parallel to the door indoor surface, with the outer peripheral edge overlapped inside the return piece at the closed position. A cover that covers the thumb turn seat, exposes the thumb turn knob and the thumb turn seat in an open position, and has a recess on the surface on the swing end side;
Formed in a substantially Z shape with a shaft part in the middle part, supported rotatably in the cover, a button formed on one end side across the shaft part, and a hook shape on the other end side A locking claw having a locking surface is formed at the tip of the cover that faces the opening direction of the cover, and the button at one end projects so as to be able to be pushed in from the recess of the cover, and the locking claw at the other end Is a lock lever that is in a locked state and is positioned so that the locking surface faces and engages with a locking portion provided on the thumb turn seat,
Comprising
In the opening direction of the cover, the locking claw of the lock lever and the locking portion of the thumb turn seat mesh with each other, and the locking surface increases in the direction of increasing the locking allowance due to the reaction force from the locking portion. Slid into the locked state,
By pushing the button of the lock lever in the same direction as the cover closing direction, the lock lever swings around the shaft portion, and the locking claw releases the locked state with the locking portion. Thumb turn cover. A plurality of the recesses are independently formed;
The thumb turn cover according to claim 1, wherein a plurality of the lock levers are provided corresponding to each of the recesses.   The thumb turn cover according to claim 1 or 2, wherein biasing means for biasing the cover in the closing direction is provided across the thumb turn seat and the cover.   4. An open / close position restricting means for holding the cover in a closed position and an open position is provided across the thumb turn seat and the cover. Thumb turn cover as described in one.   The thumb turn cover according to any one of claims 1, 2, 3, and 4, wherein a portion of the cover that covers the knob of the existing thumb turn is made of a transparent member that allows the knob to be visually recognized.

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