JP2011117149A - Locking device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a locking device which enables an operating handle to be utilized as a handle for opening and closing a door etc. in unlocking and which can make a lock body compact. <P>SOLUTION: This locking device 1 includes the lock body 3 for being attached to the door 2, and the operating handle 4 which is inserted into the lock body 3 so that the door can be locked/unlocked. A rotator 20 is slide-rotatably housed in a space portion which is formed of a flange 11 of the lock body 3 and a cylinder portion 12 thereof. Four recesses 24a, 24b, 24c and 24d axially elongated to a radial outside from a pin 23 are formed in the sliding portion 21 of the rotator 20. A shutter board 30 with blades 31a, 31b, 31c and 31d corresponding to the recesses 24a-24d is attached to the recesses 24a-24d via a spring 34. Protrusions 35 protruding to the side of the flange 11 are formed on the blades 31a and 31c, respectively; and a pair of groove portions 16 corresponding to the protrusions 35 is formed in the flange 11. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a locking device, and more particularly to a locking device capable of waterproofing and dustproofing by locking a key hole with a shutter plate during locking.

  2. Description of the Related Art Conventionally, there is known a locking device that locks and unlocks an operation handle by turning the operation handle clockwise or counterclockwise while inserting the operation handle into a keyhole of the locking device and pressing it to the back of the lock body. For example, according to Patent Document 1, when the operation handle is rotated and unlocked, the operation handle is caught inside the lock body and can be prevented from coming out of the keyhole. Therefore, the door can be opened and closed by pulling the operation handle in the unlocked state, and the operation handle can serve as both the unlocking of the locking device and the opening and closing handle such as the door.

Patent No. 2957474 (JP 2957474 B2)

  The lock body of the locking device as described above has a top portion in which a keyhole is formed, and a cylindrical portion extending in the axial direction around the top portion, and the first and second rotors that are rotatable in the cylindrical portion. Is housed. The first rotor is formed with a concave portion facing the top portion and extending in a cross shape, and a pair of convex portions corresponding to the concave portion is formed inside the top portion. A spring is attached between the first rotor and the second rotor to urge the first rotor toward the top side. Therefore, if the first rotor is not pressed by the handle, the convex portion is fitted in the concave portion and the locked state is maintained. When trying to unlock from the locked state, the first rotor is pressed by the operating handle over the thickness of the convex portion and rotated. In the unlocked state, the tip of the handle and the convex portion are pivoted. Located side by side in the direction. Accordingly, the axial length of the cylindrical portion is the sum of the lengths of the convex portion, the handle tip, and the thickness direction of the second rotor, and tends to increase in the axial direction.

  An object of the present invention is to provide a locking device that can use an operation handle as an opening / closing handle such as a door at the time of unlocking and can make the lock body compact.

  The present invention relates to an improvement of a locking device including an operation handle having a key portion and a gripping portion, a lock body that can be locked and unlocked by the operation handle, and an axial direction that is the operation handle insertion direction.

  The present invention provides the locking device, wherein the key portion includes a shaft portion extending in the axial direction and an extending portion extending radially outward from the shaft portion, and the key portion is inserted into the lock body. A housing having a through hole formed therein and a cylindrical portion extending in the axial direction from the periphery of the flange, and capable of sliding and rotating in the cylindrical portion and the key portion being insertable in the axial direction A rotating body having a recessed portion that extends, a shutter plate that is fitted to the recessed portion via an urging means and has a blade that is movable in the axial direction, and attached to an extending shaft of the rotating body that extends from the housing A projection that projects toward the flange is formed on the blade of the shutter plate, and the projection is fitted on the flange. Acceptable A groove portion is formed, and the key portion of the operation handle presses the shutter plate into the cylindrical portion in the axial direction and is movable to the recess, and the rotating body rotates the operation handle. And the extended portion is fitted into the groove portion of the flange.

  As one embodiment of the present invention, the axial length dimension of the groove portion of the flange and the projection portion of the shutter plate have the same size.

  As another embodiment, the axial length of the extending portion of the operation handle is the same as or larger than that of the protruding portion.

  As another embodiment, the axial length dimension of the recess of the rotating body is the sum of the axial length dimension of the extension and the axial length dimension of the blade. Larger than the measured dimensions.

  As another embodiment, a rotation restricting means for restricting the rotation of the rotating body within a certain angle range is further included.

  In this invention, a groove is formed in the flange of the housing, and the projection of the shutter plate is fitted into the groove during locking, and the extension that forms the key of the operation handle is fitted into the groove during unlocking. Yes. Therefore, the operation handle is held by the housing at the time of unlocking and cannot be pulled out even if it is pulled, so that it can be used as a door opening / closing handle. Furthermore, the lock body can be made compact by fitting the operation handle into the groove.

The perspective view which shows a use condition. II-II sectional view taken on the line of FIG. The disassembled perspective view of a locking device. The top view seen from the operation handle insertion surface of a locking device from the opposite side. Action | operation explanatory drawing of a locking device. Action | operation explanatory drawing of a locking device.

  1-6 shows one Embodiment of the locking device of this invention. FIG. 1 is a perspective view showing a state when the locking device is attached to a door and unlocking is performed with an operation handle, FIG. 2 is a sectional view taken along line II-II in FIG. 1, and FIG. 3 shows each component of the locking device. FIG. 4 is an exploded perspective view, FIG. 4 is a plan view when viewed from the side opposite to the operation handle insertion surface of the locking device, and FIGS. 5 and 6 are diagrams for explaining the operation of the locking device. In FIG. 4, a part thereof is omitted for explanation.

  The locking device 1 includes a lock body 3 attached to the door 2 and an operation handle 4 that is inserted into the lock body 3 and can be locked and unlocked. As shown in FIG. 1, in the locked state of the locking device 1, the claw fitting 60 of the lock main body 3 extends to the fixed frame 5 and is caught, and the door 2 cannot be opened. By inserting the operation handle 4 into the lock body 3 and rotating it clockwise, the claw fitting 60 attached to the lock body 3 rotates in the direction of the arrow X and moves to the position of the imaginary line. It can be released from the fixed frame 5 and unlocked.

  The operation handle 4 is formed at a shaft portion 41 extending in the axial direction, a gripping portion 42 formed at one end portion of the shaft portion 41 and extending perpendicularly in the axial direction, and formed at the other end portion of the shaft portion 41. It has a pair of extension part 43 extended orthogonally to an axial direction. A key portion is formed by a part of the shaft portion 41 and the extending portion 43. An opening 44 extending in the axial direction is formed at the other end of the shaft portion 41.

  In the lock body 3, the insertion direction of the operation handle 4 is an axial direction, and these axial directions coincide with each other when the operation handle 4 is inserted. The lock body 3 has a housing 10 including a flange 11 that abuts on the door 2 and a cylindrical portion 12 that extends in the axial direction with respect to the flange 11. A through hole 14 into which the operation handle 4 can be inserted is formed in the flange 11. The through hole 14 extends in the radial direction from the center hole 14 a corresponding to the shaft portion 41 of the operation handle 4 and the center hole 14 a. An extension hole 14 b corresponding to the outlet 43 is provided. A flange inner surface 13 is formed between the flange 11 and the cylindrical portion 12, and the flange inner surface 13 is in contact with the door 2 via a packing 71. The cylindrical portion 12 is inserted into an attachment hole 2 a formed in the door 2, and the housing 10 is attached to the door 2 by screwing a nut 73 through an O-ring 72.

  As shown in FIGS. 2 and 3, the housing 10 accommodates a rotating body 20 positioned in a space formed by the flange 11 and the cylindrical portion 12 so as to be slidably rotatable. The rotating body 20 includes a sliding portion 21 that can slide on the housing 10, and a rectangular extending shaft 22 that extends from the sliding portion 21 in the axial direction and extends out of the housing 10. The sliding portion 21 is formed with a pin 23 extending in the axial direction and four concave portions 24a, 24b, 24c, and 24d extending radially outward from the pin 23 and extending in the axial direction. The recesses 24 a to 24 d are formed at equal intervals of about 90 degrees with each other, and are formed in a cross shape around the pin 23. That is, the recesses 24a and 24c face each other in a substantially straight line, and the recesses 24b and 24d face each other in a substantially straight line.

  An annular groove 25 is formed on the peripheral surface of the sliding portion 21 of the rotating body 20 and an O-ring 74 is attached. A screw hole 26 is formed inside the extension shaft 22. Further, a drop-off preventing spring 75 is attached between the sliding portion 21 of the rotating body 20 and the extending shaft 22, and the rotation is performed by inserting the spring 75 into the annular groove 15 formed inside the cylindrical portion 12. The body 20 is prevented from falling off the housing 10.

  A shutter plate 30 is attached to the inside of the rotating body 20 via a spring 34. The shutter plate 30 includes blades 31a, 31b, 31c, and 31d corresponding to the recesses 24a, 24b, 24c, and 24d, a center portion 32 that is located in the center, and a center hole 33 formed in the center portion 32. ing. The pin 23 is inserted into the center hole 33, and the blades 31a to 31d are positioned in the recesses 24a to 24d. The spring 34 is inserted into the pin 23 and is held between the blades 31a to 31d and the bottom surfaces of the recesses 24a to 24d.

  The blades 31 a and 31 c are formed with projections 35 protruding toward the flange 11, and the flange 11 is formed with a pair of grooves 16 corresponding to the projections 35. The groove portion 16 is covered with the flange 11 which is thinner than other portions without penetrating the flange 11. Since the shutter plate 30 is urged toward the flange 11 by the spring 34, the projections 35 of the blades 31a and 31c are fitted into the groove 16 and the blades 31b and 31d are exposed from the through hole 14 during locking. Is done. In other words, the through hole 14 is closed by the blades 31b and 31d. By closing the through hole 14 in this way, water and dust are prevented from entering the housing 10 during locking. Further, in this state, the rotation of the rotating body 20 is restricted by the fitting of the protrusion 35 and the groove 16.

  A locking plate 50 is attached to the extending shaft 22 of the rotating body 20 by fitting a square hole 51 formed at the center thereof. The locking plate 50 is the cylindrical portion 12 of the housing 10 and is located at the opposite end to the flange 11 and is sized so as to close the opposite end. Locking portions 52a and 52b are formed in the peripheral portion of the locking plate 50 at two portions that are spaced apart in the circumferential direction and protrude outward. At a position corresponding to the locking portions 52a and 52b, a stopper 17 is formed at the opposite end of the cylindrical portion 12 so as to protrude integrally in the axial direction.

  The locking plate 50 rotates with the rotating body 20, but as shown in FIG. 4, the locking portions 52a and 52b of the locking plate 50 rotate the rotating body 20 clockwise or counterclockwise. At this time, one locking portion 52a comes into contact with one end portion 17a of the stopper 17, and the other locking portion 52b comes into contact with the other end portion 17b, so that further rotation is restricted. Locking portions 52a and 52b and end portions 17a and 17b are formed so that the rotation angle of rotating body 20 at this time is about 90 degrees. The reason for setting such a positional relationship is that the opening shapes of the recesses 24a to 24d in the rotating body 20 are cross-shaped, and the locking portions 52a and 52b and the end portions 17a and 17b of the stopper 17 A rotation restricting means for restricting the rotation of the rotating body 20 within a certain angle range is configured.

  A claw fitting 60 is further attached to the extending shaft 22 of the rotating body 20 via a washer 76. Square holes 76 a and 61 are formed in the center of the washer 76 and the claw fitting 60, and are attached to the extending shaft 22, respectively. The claw fitting 60 has a substantially rectangular shape extending outward in the axial direction from the cylindrical portion 12 of the housing 10, and can be turned about 90 degrees integrally with the rotating body 20 (see FIG. 1).

  A screw 78 is attached to the outer side of the claw fitting 60 in the axial direction via a washer 77. The washer 77 has a round hole 77 a having a smaller diameter than the extension shaft 22, and a screw 78 is inserted into the round hole 77 a, and the screw 78 is a screw hole formed in the extension shaft 22 of the rotating body 20. 26 is screwed. In this way, the locking plate 50, the washer 76, and the claw fitting 60 are prevented from coming off from the extension shaft 22.

  As shown in FIG. 5A, when the locking device 1 is in the locked state, the projections 35 and 35 of the blades 31 a and 31 c of the shutter plate 30 are pressed against the flange 11 of the housing 10 by the bias of the spring 34. And is fitted into the grooves 16 and 16. By fitting the protrusions 35 and 35 and the groove portions 16 and 16, the shutter plate 30 can be prevented from rotating with respect to the housing 10, and the rotating body 20 holding the shutter plate 30 is rotated. The rotation with respect to the housing 10 can be restricted by the restriction means. Since the rotating body 20 does not rotate, the claw fitting 60 attached thereto does not turn, and the claw fitting 60 can be prevented from turning and unlocking from the inside of the door 2. At this time, the blades 31b and 31d (not shown) close the through hole 14. In this state, the locking portion 52a contacts the end portion 17a of the stopper 17, and the locking portion 52b is separated from the end portion 17b (see FIG. 4).

  When unlocking the locking device 1 and opening and closing the door 2, the protrusion 43 of the operation handle 4 is inserted into the through hole 14 of the housing 10, and the blades 31 b and 31 d closing the through hole 14 are applied. Contact (not shown). Further, the operation handle 4 is pushed in, and the blades 31a and 31c and the protrusions 35 and 35 of the shutter plate 30 are resisted against the bias of the spring 34 as shown in FIG. , 24c. As a result, the projections 35 of the blades 31a and 31c of the shutter plate 30 are removed from the groove 16, and the extension 43 of the operation handle 4 enters the recesses 24b and 24d of the rotating body 20 (not shown).

  When the operation handle 4 is rotated in this state, the extending portion 43 rotates the rotating body 20, and the locking portion 52b of the locking plate 50 hits the end portion 17b of the stopper 17 of the housing 10 and stops (see FIG. 4). The rotation angle of the rotating body 20 at this time is about 90 degrees. As a result, the claw fitting 60 locked to the fixed frame 5 turns in the direction of the arrow X in FIG. 1, so that the claw fitting 60 is detached from the fixed frame 5 and can be unlocked.

  As shown in FIG. 6A, the operation handle 4 is rotated while the spring 34 is bent, and the rotation of the rotating body 20 is rotated, whereby the recesses 24b and 24d and the blades 31b and 31d of the shutter plate 30 are It moves to a position corresponding to the grooves 16 and 16. Further, the extending portion 43 of the operation handle 4 also rotates and moves to a position corresponding to the groove portion 16.

  When the pressing of the operating handle 4 into the housing 10 is stopped, the unlocked operating handle 4 is pressed toward the flange 11 by the spring 34 via the shutter plate 30 as shown in FIG. 6B. . Therefore, the extending portion 43 moves in the axial direction and is fitted into the groove portion 16. In such a state, when the operation handle 4 is pulled to the outside of the door 2, the projecting portion 43 is caught by the flange 11 and the door 2 can be opened. Therefore, the operation handle 4 can be used as a handle for opening and closing the door 2, and the door 2 can be easily opened and closed. Further, when the extension portion 43 is fitted into the groove portion 16, the rotation of the operation handle 4 can be restricted. Therefore, when the operation handle 4 is held and the door 2 is opened and closed, it can be prevented that the door 2 is accidentally detached from the groove 16 and further removed from the through hole 14.

  According to this embodiment, the groove portion 16 is formed in the flange 11, and the projection portion 35 of the shutter plate 30 is fitted into the groove portion 16 in the locked state, and the projection portion 43 of the operation handle 4 is fitted in the unlocked state. Since the respective rotations are regulated, the length dimension in the axial direction can be reduced as compared with the case where the convex portion is formed inside the flange 11 as the regulating means.

  In this embodiment, the length dimension P in the axial direction of the groove 16 of the flange 11 and the length dimension Q in the axial direction of the protrusion 35 of the shutter plate 30 are substantially equal. Therefore, in the locked state in which the protrusion 35 is fitted in the groove 16, the blades 31 b and 31 d on which the protrusion 35 is not formed contact the inner surface of the flange 11 and close the through hole 14. On the other hand, the length dimension R in the axial direction of the extending portion 43 of the operation handle 4 is larger than the length dimension P of the groove portion 16 and the length dimension Q of the projection portion 35. By making the length dimension R of the extending portion 43 larger than the length dimension Q of the protruding portion 35, the protruding portion 35 is surely detached from the groove portion 16 when the operation handle 4 is inserted into the housing 10 until it can be rotated. Thus, it is easy to obtain an operation feeling of pressing and rotating the operation handle 4 in the axial direction. Therefore, the operation handle 4 can be easily rotated to rotate the shutter plate 30 and the rotating body 20, and the claw fitting 60 can be rotated.

  Since the length dimension R of the extension part 43 is larger than the length dimension P of the groove part 16, in the unlocked state in which the extension part 43 is fitted to the groove part 16, the groove part 16. The extension part 43 protrudes from. However, the axial length dimension S of the recesses 24a to 24d may be larger than at least the length dimension R of the extension 43 and the axial length dimension T of the blades 31a to 31d. Therefore, the length dimension in the axial direction can be reduced as compared with the case where the convex portion is formed inside the flange 11 as in the prior art. In addition, the length dimension R of the extension part 43 should just be the same as the length dimension Q of the projection part 35, or larger than it.

DESCRIPTION OF SYMBOLS 1 Locking device 3 Lock body 4 Operation handle 10 Housing 11 Flange 12 Cylindrical part 14 Through-hole 16 Groove part 17a End part (rotation restricting means)
17b end (rotation restricting means)
20 Rotating body 22 Extending shafts 24a to 24d Recess 30 Shutter plates 31a to 31d Blades 34 Spring (biasing means)
35 Protruding part 41 Shaft part 42 Gripping part 43 Extension part 52a Locking part (rotation restricting means)
52b Locking part (rotation restricting means)
60 Claw bracket

Claims (5)

In a locking device including an operation handle having a key portion and a gripping portion, a lock body that can be locked and unlocked by the operation handle, and an axial direction that is the operation handle insertion direction,
The key portion includes a shaft portion extending in the axial direction and an extending portion extending radially outward from the shaft portion,
The lock main body includes a flange having a through-hole into which the key portion is inserted, a housing having a cylindrical portion extending in the axial direction from the periphery of the flange, and is capable of sliding and rotating in the cylindrical portion and the key portion. A rotating body having a recess extending in the axial direction, a shutter plate fitted in the recess via an urging means and movable in the axial direction, and extending from the housing A claw fitting that is attached to the extension shaft of the rotating body and that can be turned along with the rotation of the rotating body,
The blade of the shutter plate is formed with a protruding portion that protrudes toward the flange, and the flange is formed with a groove portion into which the protruding portion can be fitted,
The key portion of the operation handle presses the shutter plate into the cylindrical portion in the axial direction and is movable to the recess, and the rotating body is slidably rotated by the rotation of the operation handle, The locking device according to claim 1, wherein the extending portion is fitted into the groove portion of the flange.   The locking device according to claim 1, wherein the axial length of the groove portion of the flange and the protrusion of the shutter plate have the same size.   3. The locking device according to claim 1, wherein a length dimension in the axial direction of the extending portion of the operation handle is equal to or larger than that of the protruding portion.   The length dimension in the axial direction of the concave portion of the rotating body is larger than a dimension obtained by adding the length dimension in the axial direction of the extension part and the length dimension in the axial direction of the blade. The locking device according to any one of 1 to 3.   The locking device according to any one of claims 1 to 4, further comprising a rotation restricting means for restricting the rotation of the rotating body within a certain angle range.

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