JP6306539B2 - Locking device - Google Patents

Description

  The present invention relates to a locking device for locking an openable / closable door or lid.

2. Description of the Related Art Conventionally, a locking device for locking an openable / closable door or lid is known. For example, Patent Document 1 discloses a pillar body having an opening for exchanging and inspecting a control device used in road lighting, a road sign, and the like, and a lid body that closes the opening of the pillar body so as to be opened and closed. A post having a circular cross section is disclosed.
JP 2004-92254 A

  In the support | pillar disclosed by patent document 1, a cover body is the curved shape which follows the cross-sectional shape of a support | pillar main body, Comprising: The support | pillar has a circular cross section also in the part in which an opening is located. As described above, the lid body having a curved shape that follows the outer shape of the column main body is preferable in appearance as compared with the case where the lid body has a rectangular shape, and prevents stress concentration due to a sudden shape change. it can.

  However, the lid body and the column main body are only fastened by bolts, and the fastening may be released by an external impact, and it is troublesome to remove the bolts when removing the lid body. In order to eliminate such disadvantages, locking with a latch mechanism is also conceivable, but it is difficult to lock a latch that moves up and down or left and right from the locking body to a column with a circular cross section, and is stable. It cannot be locked.

The present invention is an improvement of a conventional locking device, and the cross-sectional shape is a curved wall surface,
The present invention relates to a locking device capable of stably locking a lid or a door.

  In order to solve the above-mentioned problems, the present invention has a lock body having a vertical direction and a front-rear direction, fixed to a lid that can be attached to and detached from a wall surface, a key, and a locking tool that can be locked to the inner surface of the wall surface. And a locking device.

A feature of the present invention based on the premise is that the lock body has a rotating body that rotates in conjunction with the rotation operation of the key, and a blade disposed at a rear end of the rotating body, and the swirling motion of the blade. Is provided on the rear surface of the first end and the first end and the second end facing each other in the vertical direction. And a roller that contacts the blade, and an insertion hole that is positioned on the second end side of the roller and through which the rear end of the rotating body is inserted so as to be movable up and down. The locking tool moves upward or downward by sliding contact with the roller, and the first end is locked to the inner surface of the wall surface .

The present invention has the following preferred embodiments.
( 1 ) The blade has a contact surface that is in sliding contact with the roller, and the contact surface has a round shape extending in a length direction of the blade.
( 2 ) It further has a rotation restricting means for the rotating body, and the blade can turn 90 ° from the unlocked position to the locked position.
( 3 ) When the blade rotates from the unlocked state and the contact angle between the contact surface of the blade and the roller becomes 45 degrees or less , the locking tool reciprocates .
( 4 ) The contact surface of the blade is on the base end side of the blade, the first contact portion with which the roller contacts in the unlocked position, the second contact portion having a round shape, A third abutting portion that is located on a tip surface of the blade and abuts on the roller at a locking position.
( 5 ) The lock body further includes a casing that houses the rotating body, and the locking member includes a main body portion where the roller and the insertion hole are positioned, and both sides extending forward from both sides of the main body portion. The casing is further disposed between the side wall portions, and a part of the outer peripheral surface thereof is slidably contacted with the inner surfaces of the side wall portions by the reciprocating movement of the locking tool.
( 6 ) The rotating body further includes a shaft tube portion and a shaft portion that is located in the shaft tube portion and is spring-biased rearward, and further swivels the blade in the locked state. The shaft portion moves forward, and the first end of the locking tool is brought into close contact with the inner surface of the wall surface.
(7) The lid has upper and lower end portions, the lock body is attached to the upper end portion and the lower end portion, and the blade of the lock body attached to the upper end portion is swung. The locking tool is moved upward to be locked to the wall surface, and the locking tool is moved downward to be engaged with the wall surface by turning the blade of the lock body attached to the lower end portion. Stopped.

  The locking device according to the present invention is provided with a cam mechanism that converts the revolving motion of the blades arranged at the rear end of the rotating body interlocking with the rotation operation of the key into the vertical reciprocating motion of the locking tool. The locking cam can be moved up and down with a relatively large stroke by the rotating cam.

In addition to the embodiments of the present invention, the following drawings include configurations that can be selectively implemented and configurations that can be implemented in combination.
The front view of the support | pillar which has the cover body to which the locking device was fixed which shows the use condition of a locking device. Sectional drawing which follows the II-II line | wire of FIG. The perspective view seen from the front side of the locking device. The perspective view seen from the back side of the locking device. The disassembled perspective view of a locking device. Sectional drawing which follows the VI-VI line shown in FIG. (A) The top view which looked at the casing from the front. (B) The top view which looked at the casing from back. (C) Sectional drawing of the casing which follows the VII (c) -VII (c) line | wire shown in FIG. (A) The top view of a blade | wing. (B) The top view of a locking tool. (A)-(c) The front view of the locking device which shows a mode that a blade | wing turns until it changes from an unlocked state to a locked state. (A)-(c) The rear view of the locking device corresponding to Drawing 9 (a)-(c). (A) The top view of the rotary body in an unlocked state. (B) The top view of the rotary body in a locked state. (A) The top view of the cam groove in an unlocked state. (B) The top view of the cam groove in the locked state.

  Each of the following embodiments according to the present invention includes not only an indispensable configuration of the invention but also a configuration that can be selectively employed and a preferable configuration.

  Referring to FIGS. 1 and 2, the locking device 10 according to the present invention is used for a column 2 used for, for example, a road street or a road sign. The column 2 includes a column body 3 having a circular cross section and a lid (lid) 4 that closes the opening of the column body 3. A switchboard and a control device are housed inside the column main body 3, and an opening is formed at the lower end of the column main body 3 for inspection of these devices and replacement of parts. The lid 4 closes the opening of the column main body 3 so as to be openable and closable, and is detachably fitted to a pair of skirts 6 protruding forward from the column main body 3 via packing (not shown). Yes.

  The lid body 4 has upper and lower end portions 4A and 4B, and locking devices are attached to the upper and lower end portions 4A and 4B, respectively. The locking device 10 has an up-down direction Y and a front-rear direction X, and includes a lock body 20 fixed to the upper and lower ends 4A, 4B of the lid body 4, a key 7, and the inner surface (the inner surface of the wall surface) of the column body 3. And a locking tool 30 that can be locked to 3a. In addition, the up-down direction Y and the front-back direction X of the locking device 10 correspond to the up-down direction and the front-back direction of the support column 2, respectively.

  Referring to FIG. 2, the locking tool 30 of the locking device 10 reciprocates up and down by a rotation operation of the key 7, and is a locking device (first locking device) disposed on the upper end portion 4 </ b> A of the lid 4. 10, when the key 7 inserted into the keyhole 11 from the unlocked state is rotated in the clockwise direction R1 when viewed from the front side, one end portion (latch portion) 31 of the locking tool 30 moves upward. Then, it is locked to the inner surface 3 a of the column main body 3. On the other hand, in the locking device (second locking device) 10 arranged at the lower end portion 4B of the lid body 4, the locking tool 30 moves downward by rotating the key 7 in the clockwise direction from the unlocked state. Thus, the first end portion (latch portion) 31 is locked to the inner surface 3 a of the column main body 3. In this way, the first end 31 of the locking tool 30 of the pair of locking devices 10 is locked to the inner surface 3a of the column main body 3 inside the column 2 by the rotation operation of the key 7, so that the skirt 6 The lid body 4 assembled in is locked in a state where the forward movement is restricted. In the locked state, the locking tool 30 of the locking device 10 located at the upper end 4A is moved downward by rotating the key 7 inserted into the key hole 11 in the opposite direction (counterclockwise) to locking. The locking is released, and the locking device 30 of the locking device 10 located at the lower end 4B moves upward to release the locking. Can be removed.

  Since the locking device 10 disposed at the upper end 4A and the lower end 4B of the lid 4 is the same in the basic configuration, the locking device disposed mainly at the upper end 4A will be described below in order to avoid repeated description. 10 will be described in detail. The locking device 10 only needs to be disposed on at least one of the upper and lower end portions 4A and 4B of the lid body 4, and the end on the side where the locking device 10 is not disposed is a known fastening means, for example, You may fasten with the volt | bolt and you may have a hinge means so that opening and closing is possible.

<Lock body>
Referring to FIGS. 2 to 5, the lock body 20 of the locking device 10 is accommodated in the lid portion 21 having the lock front surface portion 22 in which the substantially hexagonal keyhole 11 is disposed, the casing 40, and the casing 40. And a rotating body 50. The locking device 10 has an axis P along the insertion direction of the key 7, and the rotation axis of the rotating body 50 and the pivot axis of the blade described later coincide with the axis P. The rotating body 50 includes a shaft tube portion 51 and a shaft portion 52 that is spring-biased by a coil spring 53 in the shaft tube portion 51.

  The lid portion 21 is substantially circular and includes a lock front surface portion 22 having a central opening into which the front end of the rotating body 50 is inserted and a rear peripheral wall portion 23 extending rearward from the outer peripheral edge of the lock front surface portion 22. The casing 40 is cylindrical, has a flange 41 that is the same shape as the lid 21 and has a slightly smaller outer dimension, and a cylindrical accommodating portion 42 that extends rearward from the flange 41. 21 is fitted to the flange 41 of the casing 40. Specifically, the lid portion 21 and the casing 40 are a pair of screw holes 22 a located on the lock front surface portion 22 of the lid portion 21 in a state where the rear peripheral wall portion 23 is overlapped with each other so as to cover the flange 41. They are screwed together by screws 25 that pass through a pair of screw holes 41 a located in the flange 41. However, in addition to screwing them, the pair of protrusions extending rearward from the lock front surface portion 22 of the lid portion 21 may be fastened by being inserted into the screw holes 41a of the flange 41 and secured.

  Referring to FIGS. 3 to 5 and 7, the accommodating portion 42 of the casing 40 includes a pair of bellows-shaped first side surfaces 43 that are opposed to each other via the axis P, and a first side surface 43 in the circumferential direction of the accommodating portion 42. And a pair of flat second side surfaces 44 positioned therebetween. Moreover, the accommodating part 42 has the inner peripheral wall part 45 extended in the radial inside on the inner surface of a rear end.

  Referring to FIG. 7 (a), the inner peripheral wall portion 45 is a pair of semicircular projecting pieces that project from the inner surface of the accommodating portion 42 toward the axis P when viewed from the front side. Both ends of each of the portions 45 are spaced apart from each other in the circumferential direction, and an axial groove 47 formed by the separated portions is formed between the inner circumferential wall portions 45. Referring to FIG. 7B, the inner peripheral wall portion 45 has a rear end located in front of the rear end of the accommodating portion 42 as viewed from the rear side. A pair of circumferential grooves 48 extending in the circumferential direction between the rear end and the rear end of the accommodating portion 42 and arranged symmetrically with respect to the axis P are formed. The circumferential groove 48 is formed in a range of 90 degrees in the circumferential direction, and restricts movement of both ends of a movement restricting pin 62 described later disposed in the circumferential groove 48 by 90 degrees or more in the circumferential direction. That is, the circumferential groove 48 and the movement restricting pin 62 constitute a rotation restricting means that restricts the rotation of the rotating body 50. Referring to FIGS. 5 and 7C, a notch 42a for arranging the movement restricting pin 62 in the circumferential groove 48 is formed. In the assembled state of the locking device 10, the notch 42 a is sealed so that the movement restricting pin 62 is not removed.

  Referring to FIGS. 5 and 6, the rotating body 50 accommodated in the casing 40 has a cylindrical shape, and a shaft tube portion 51 that moves slidably in the casing 40 in the front-rear direction, and a shaft tube portion 51. And a shaft portion 52 having a smaller diameter than that of the shaft portion 52 located inside. The shaft tube portion 51 includes a front end (closed end), a rear end (open end), a front end portion 54 having a key hole 11, and a cylindrical portion 55 having a larger diameter than the front end portion 54. The rotating body 50 is slidably inserted in the internal space from the front opening of the casing 40, and the front end portion 54 projects from the front opening, and the central opening of the lock front surface portion 22 of the lid portion 21 communicates with the front opening. Is exposed to the outside from the front. Referring to FIG. 6, in a state where the rotating body 50 is housed in the housing portion 42, the rear end 51 a of the shaft tube portion 51 is in contact with the front end 45 a of the inner peripheral wall portion 45, and the shaft portion 52 is connected to the casing 40. It extends backward from the rear opening. A coil spring 53 is disposed in a compressed manner inside the shaft tube portion 51. One end of the coil spring 53 is in contact with the inner surface of the front end portion 54 of the shaft cylinder portion 51, and the other end is in contact with the front end surface of the shaft portion 52. The coil spring 53 biases the shaft portion 52 rearward. .

  3 and 6, the front surface of the front end portion 54 of the shaft tube portion 51 is substantially flush with the lock front surface portion 22 of the lid portion 21, and the front surface of the front end portion 54 has a substantially hexagonal key. Hole 11 is located. In the present embodiment, the key (for example, hexagon wrench) 7 has a hexagonal cross section at the tip, and the keyhole 11 has a hexagonal shape corresponding to the tip shape of the key 7. The hole 11 can adopt various known shapes such as a circle, an ellipse, and a rectangle.

  Referring to FIG. 11, a pair of substantially U-shaped cam grooves 58 extending in the circumferential direction is formed in the cylindrical portion 55 of the shaft tube portion 51. Each of the pair of cam grooves 58 has a short first groove 58A and a long second groove 58B.

  Referring to FIGS. 5 and 6, the shaft portion 52 includes a proximal end portion and a rearward extending portion 59 having a smaller diameter than that extending rearward from the proximal end portion. Two through holes 52a and 52b arranged at intervals in the front-rear direction X are formed in the base end portion of the shaft part 52 in a direction perpendicular to the axis P, and these through holes 52a and 52b A connecting pin (first pin) 61 slightly longer than the diameter of the shaft portion 52 and a movement restricting pin (second pin) 62 are inserted therethrough. 11 (a) and 11 (b), both ends of the connecting pin 61 protruding from the through hole 52a on the front side of the shaft portion 52 are slidably engaged with the cam groove 58 of the shaft tube portion 51. ing.

  2 and 6, both ends of the movement restricting pin 62 protruding from the through hole 52b on the rear side of the shaft portion 52 are slidably engaged with the circumferential groove 48 in the casing 40. Yes. The rearward extending portion 59 of the shaft portion 52 has a bolt hole penetrating the inside thereof and a rectangular rear end 59a. A square hole 71 of the blade 70 is fitted to the rear end, and a washer is interposed therebetween. Are fixed with bolts 63.

  Referring to FIGS. 4 and 8A, the blade 70 has a plate shape having a required thickness dimension, and includes a proximal end portion 72 where the square hole 71 is located, a distal end portion 73, and a length direction thereof. It has the contact surface 74 which contact | abuts the roller 33 of the latching tool 30 extended in the undulation shape. The contact surface 74 of the blade 70 includes a first contact portion 74A that contacts the roller 33 in the unlocked position, a second contact portion 74B having a rounded shape, and a locking position that is positioned on the tip surface 73a of the blade 70. And a third abutting portion 74C with which the roller abuts. About the shape of the blade | wing 70 and the shape of the contact surface 74, in addition to the example of illustration, a well-known shape can be employ | adopted as long as there exists a technical effect mentioned later.

  2 to 4, the lock body 20 having such a configuration is inserted from the front side into the attachment hole of the lid body 4, and the rear end of the shaft tube portion 51 and the inner peripheral wall portion 45 of the housing portion 42. The front ends are in contact with each other via an O-ring 60 so that the rotating body 50 cannot move further rearward. That is, the inner peripheral wall portion 45 can function as a stopper that restricts the backward movement of the rotating body 50 inserted into the housing portion 42 from the front side. The O-ring 60 is optional, and can prevent water from passing through the inside of the housing portion 42 from the outside and entering the inside of the column main body 3. On the rear surface of the flange 41 of the casing 40, together with an O-ring (not shown), a packing 65 for preventing water from entering the inside of the column main body 3 from the outside is disposed. The packing 65 has a through hole having the same shape as the attachment hole of the lid 4. The lock body 20 inserted through the attachment hole via the packing 65 is screwed by a nut 67 via a washer 66 and attached to the lid.

<Locking tool>
2 to 5 and 8, a locking tool (a U-shaped bracket) 30 has a U-shaped cross section, and includes first and second end portions 31 and 32 that face each other in the vertical direction Y, and a first portion. The roller 33 positioned on the rear surface of the end portion 31 and the extension portion (rear end of the rotating body 50) 59 of the shaft portion 52 that are positioned on the second end portion 32 side of the roller 33 are inserted in a vertically movable manner. And an insertion hole 34. Further, the locking tool 30 further includes a main body portion 35 where the roller 33 and the insertion hole 34 are located, and both side wall portions 36 extending forward from both sides of the main body portion 35. In a state where the locking tool 30 and the lock body 20 are combined, the accommodating portion 42 of the casing 40 is disposed between the side wall portions 36. The accommodating portion 42 is disposed in a state where the flat second side surface 44 is in contact with the inner surfaces of the side wall portions 36, and the second side surface 44 of the accommodating portion 42 is moved by the vertical movement of the locking tool 30. The inner surfaces of the side wall portions 36 are in sliding contact. The roller 33 is rotatably supported via a screw 68 inserted into an attachment hole located on the first end portion 31 side of the main body portion 35. The locking tool 30 moves while sliding the inner periphery of the insertion hole 34 to the extension part 59 of the shaft part 52, and the length dimension in the vertical direction Y of the insertion hole 34 is the locking tool 30. This represents the vertical movement stroke (movement amount).

<Locking operation>
Referring to FIG. 9A, in the unlocked state, the blades 70 lie down and extend in a direction crossing the vertical direction Y. The tip 73 of the blade 70 is positioned to be spaced downward from the lower end edge 3D of the inner surface 3a of the column main body 3. Referring to FIG. 10A, on the rear surface of the locking tool 30, the roller 33 comes into contact with the flat portion of the first contact portion 74 </ b> A located on the base end portion 72 side of the contact surface 74 of the blade 70. Yes. In the unlocked state, the tangent line P3 is located on the perpendicular line K connecting the rotation axis P1 of the roller and the rotation axis P2 of the blade. Therefore, the intersection angle (contact angle) α between the perpendicular line K and the virtual line L described later connecting the rotation axis P1 and the tangent line P3 is 0 degree. The first abutting portion 74A of the blade 70 is flat, and even if a force for turning the blade 70 is applied by an external impact on the lock body 20, the blade 70 is turned and locked. The tool 30 does not move. Referring to FIG. 11A, in the unlocked state, the connecting pin 61 is located on the end side of the groove portion 58A on the long side of the U-shaped cam groove 58.

  Referring to FIG. 12A, when the tip of the key 7 is inserted into the key hole 11 located in the lock front surface portion 22 and rotated in the clockwise direction R1 when viewed from the front side, the shaft tube portion 51 rotates. Thereby, a force acts to move the connecting pin 61 along the groove portion 58B of the cam groove 58. At this time, both ends of the movement restricting pin 62 attached to the shaft portion 52 are located on the start end 48 a side of the circumferential groove 48, and can move only in the circumferential direction along the circumferential groove 48. In addition, the connecting pin 61 does not move along the groove portion 58B of the cam groove 58, receives the rotational force in the circumferential direction at that position, and rotates the shaft portion 52 together with the shaft tube portion 51 in the clockwise direction. Accordingly, the blade 70 turns. As described above, since the circumferential groove 48 is formed in a range of 90 degrees in the circumferential direction, when both ends of the movement restricting pin 62 move 90 degrees in the circumferential direction, the circumferential groove 48 is located at a portion where the axial groove 47 intersects. No further movement is possible in the circumferential direction.

  Referring to FIG. 9B, when a force is applied to the blade 70 to turn in the R2 direction, the roller 33 in contact therewith rotates in the Q direction. Referring to FIG. 10 (b), the blades 70 are swung from the unlocked state (intersection angle α is 0 degree), and the roller 33 is within the range where the intersection angle α between the perpendicular K and the virtual line L is 0 to 45 degrees. Rotates and the locking tool 30 begins to move upward. In other words, even if the blades 70 are turned, if the intersection angle α is about 45 degrees or more, the roller 33 rotates and the locking tool 30 does not move upward. This cam mechanism will be described from a mechanical point of view. When the intersection angle α between the imaginary line L and the horizontal line K becomes 45 degrees or more, the force to move the roller 33 upward by the blades 70 causes it to move in the lateral direction. On the other hand, when the intersection angle α is 45 degrees, the force for moving the roller 33 upward and the force for moving the roller 33 in the lateral direction are substantially equal. The second contact surface 74B has a round shape, and extends downward from the apex to the tip 73 side. Further, by turning the blade 70, the intersection angle α is always 45 degrees or less, and the roller 33 Moves upward while rotating in the Q direction.

  9 (c) and 10 (c), when the blade 70 is turned 90 degrees from the unlocked state, the roller 33 is in contact with the third contact portion 74C located on the flat tip surface 73a. It becomes. That is, the intersection angle α between the perpendicular line K and the virtual line L becomes 0 degree as in the released state. Thereby, the roller 33 stops rotating, the movement of the locking tool 30 is stopped, and the first end portion 31 of the locking tool 30 is positioned above the lower end edge 3D of the inner surface 3a of the column main body 3, The inner surface 3a is opposed or brought into contact with the inner surface 3a to be locked.

  11 (b) and 12 (b), when the key 7 is further rotated 90 degrees clockwise from the locked state, both ends of the movement restricting pin 62 are only axially along the axial groove 47. Since it is movable, the connecting pin 61 moves relatively along the groove portion 58B of the cam groove 58 of the shaft cylinder portion 51 to move the shaft portion 52 forward against the biasing force of the coil spring 53. As a result, the blade 70 moves to the side of the locking tool 30 and comes into close contact with the rear surface of the main body 35 to move it forward, so that the first end 31 of the locking tool 30 comes into close contact with the inner surface 3a of the column main body 3. Is done. When the connecting pin 61 moves to the short groove portion 58 </ b> A in the cam groove 58, the connecting pin 61 is locked with respect to the biasing direction of the coil spring 53 even if no rotational force is applied to the shaft tube portion 51. Therefore, the connecting pin 61 does not return to the original unlocked position, and the state in which the blade 70 is in close contact with the inner surface 3a of the column main body 3 is maintained.

<Unlocking operation>
Next, when returning the locking tool 30 from the locked position to the unlocked position, the key 7 is rotated counterclockwise to rotate the shaft cylinder portion 51, whereby the connecting pin 61 is moved from the short groove portion 58A to the long piece. It moves relative to the groove portion 58B of the first, and the locked state is released. At that time, since the movement restricting pin 62 is engaged with the axial groove 47, the shaft portion 52 moves slightly forward while the lock is released. Since the shaft portion 52 is urged rearward by the coil spring 53, the movement restricting pin 62 engages with the axial groove 47, and the connecting pin 61 can move along the groove portion 58A. The part 52 moves rearward by the urging force of the coil spring 53, and the blade 70 is separated from the rear surface of the main part 35 of the locking tool 30.

  When the shaft cylinder portion 51 is rotated 90 degrees and the connecting pin 61 is positioned at the end of the groove portion 58 </ b> A of the cam groove 58, the movement restricting pin 62 is positioned at the intersection with the circumferential groove 48. When the key 7 is further rotated 90 degrees counterclockwise, the rotational force applied to the shaft tube portion 51 is transmitted to the shaft portion 52 via the connecting pin 61. Since the movement restricting pin 62 is movable along the circumferential groove 48, the shaft portion 52 rotates, and the blade 70 turns 90 degrees counterclockwise from the locking position. As the blade 70 turns, the roller 33 in contact with the blade 70 rotates in a direction opposite to the direction Q of the turn of the blade 70, and the locking tool 30 moves downward by its own weight, and is unlocked.

  Since the locking device 10 according to the present embodiment has a cam mechanism that converts the revolving motion of the blade 70 into the vertical reciprocating motion of the locking tool 30, the blade 70 is revolved by the rotation of the key 7, and the revolving force is engaged. The lid portion 21 can be easily locked and unlocked easily by being transmitted to the stopper 30. That is, the locking tool 30 can be moved up and down with a relatively large stroke by sliding the shaft portion 52 in the insertion hole 34 with a relatively small rotating cam located in the lock body 20.

  In the normal locking device 10, when the column main body 3 has a circular cross section, it is difficult to lock the flat latch plate, and a separate mounting bracket is fixed and welded to the inner surface of the column main body 3. There is a need. In the locking device 10, the first end portion (latch) 31 that contacts the inner surface 3 a of the column main body 3 of the locking tool 30 has a U-shaped cross section, and therefore, from the front surface of the side wall portions 36 in the locked state. The two abutting portions come into contact with the inner surface, and the first end 31 can be stably locked to the inner surface having a circular cross section without providing a mounting bracket. Since the locking tool 30 has a contact portion composed of two side wall portions 36 having a certain width dimension, the locking tool 30 can be stably locked to the column main body 3 having a curved section, It is heavier than a normal latch plate. Accordingly, when the locking tool 30 itself is turned by rotating the key, a relatively large rotational force is required, and the tip of the locking tool 30 may collide with the inner surface of the column main body 3. By providing a cam mechanism that turns the lightweight and compact blade 70 to move the locking tool 30 up and down, locking and unlocking can be performed with a relatively small rotational force.

  In the present embodiment, the entire locking device 30 has a conical cross section, but only the first end 31 may have a conical cross section, and the first end 31 is As long as it has a plurality of contact portions with respect to the inner surface 3a of the column main body 3, it can be appropriately changed to various known shapes such as a curved shape along the inner surface shape and a polygonal cross section.

  Further, in the locked state, the blade 70 can be moved forward to contact the rear surface of the main body 35 of the locking tool 30 and the locking tool 30 can be moved forward, so that the locking tool 30 is stable. It is locked to the column main body 3. Since the locking device 10 has such a structure (retraction structure), the locking tool 30 may be opposed to the inner surface 3a of the column main body 3 before moving forward by the blade 70, It is possible to suppress wear due to sliding contact with the inner surface 3a when reciprocating up and down. Moreover, when the locking tool 30 reciprocates up and down, the roller 33 which is a portion that receives the rotating blade 70 rotates, so that the blade 70 and the roller 33 can be prevented from being worn by friction.

  Since the locking device 10 is directly fixed to the lid portion 21 without requiring a mounting bracket, the locking device can be installed only by replacing the lid body with respect to a conventional support. In addition, the locking tool 30 can be stably reciprocated up and down while being in sliding contact with the second side surface 44 of the casing 40 using both side wall portions 36 as guide rails, and guides the movement thereof. The structure is simpler than that requiring a separate member. As the cam mechanism inside the lock body 20, a known mechanism can be adopted as long as the rotating body 50 can be rotated and regulated by rotating the key 7 and the blade 70 can be turned.

3 Column body 3a Wall surface (inner surface of column body)
4 Lid (lid)
4A Upper end 4B Lower end 7 Key 10 Locking device 20 Lock body 30 Locking tool 31 Locking tool first end 32 Locking tool second end 33 Roller 34 Insertion hole 35 Main part 36 Both side wall part 50 Rotation Body 51 Shaft cylinder portion 52 Shaft portion 55 Cylindrical portion 59 Rear end of rotating body (backward extending portion of shaft portion)
70 blade 72 base end portion 73a tip surface 74 blade contact surface 74A first contact portion 74B second contact portion 74C third contact portion K perpendicular L tangent line X longitudinal direction Y vertical direction

Claims (8)

In a locking device having a vertical direction and a front-rear direction, including a lock body fixed to a lid that can be attached to and detached from a wall surface, a key, and a locking tool that can be locked to the inner surface of the wall surface.
The lock body includes a rotating body that rotates in conjunction with a rotation operation of the key, and a blade that is disposed at a rear end of the rotating body,
A cam mechanism for converting the revolving motion of the blades into the reciprocating motion of the locking member ;
The locking tool includes a first end and a second end facing each other in the vertical direction, a roller positioned on a rear surface of the first end and abutting the blade, and the second of the roller. The engaging member is located on the end side, and has an insertion hole through which the rear end of the rotating body is inserted so as to be movable up and down. The locking device moves and the first end is locked to the inner surface of the wall surface . The locking device according to claim 1 , wherein the blade has a contact surface that is in sliding contact with the roller, and the contact surface has a rounded shape extending in a length direction of the blade. Wherein a rotation restricting means of the rotating body further said vanes lock device according to claim 1 or 2 to the locked position from the unlocked position is 90 ° pivotable. The locking according to claim 2 , wherein the blade reciprocates when the blade turns from an unlocked state and a contact angle between the contact surface of the blade and the roller becomes 45 degrees or less. apparatus. The contact surface of the blade is on the base end side of the blade, and a first contact portion with which the roller contacts in an unlocked position, a second contact portion having a round shape, and the blade The locking device according to claim 2, further comprising: a third abutting portion which is located on a distal end surface and abuts on the roller at a locking position. The lock main body further includes a casing that accommodates the rotating body, and the locking tool includes a main portion where the roller and the insertion hole are positioned, and both side wall portions extending forward from both sides of the main portion. Further comprising
Said casing is disposed between the two side walls, by the reciprocating movement of the fastener, in any one of claims 1 to 5, a part of its outer peripheral surface is in sliding contact with the inner surface of the side wall portions The locking device as described. The rotating body further includes a shaft tube portion and a shaft portion that is located in the shaft tube portion and is spring-biased backward, and in the locked state, the shaft portion is further rotated by rotating the blade. The locking device according to any one of claims 1 to 6 , wherein the locking device moves forward and the first end of the locking tool is brought into close contact with the inner surface of the wall surface. The lid has upper and lower ends, and the lock body is attached to the upper end and the lower end,
By rotating the blade of the lock body attached to the upper end, the locking tool moves upward and is locked to the wall surface, and the blade of the lock body attached to the lower end is moved. The locking device according to any one of claims 1 to 7 , wherein the locking device moves downward and is locked to the wall surface by turning.

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