JP2016089556A - Padlock having counter for the number of times of unlocking - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact and stout padlock having a counter for the number of times of unlocking.SOLUTION: A padlock 1 includes a lock body 2, a shackle 3, a cylinder lock 4 arranged in the lock body 2, a latch member 5, a counter dial 6, and a transmission mechanism 7. Locking is completed by putting the shackle 3 on a member to be locked, rotating a rotor 42 with a key to a locking direction in the situation in which the shackle 3 is pushed into a receded position as a locked position, engaging a latch portion 51b with a notch 33 of the shackle 3, and thereafter taking out the key from the rotor 42. When unlocked, the latch member 5 and a holding member 71 rotate together with the rotor 42 to an unlocking direction, and the counter dial 6 is rotated through a shaft member 72 and a ratchet claw member 73 so as to increment a displayed numerical value.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a padlock including a counter that displays a numerical value representing the number of times of unlocking from a display window so that the numerical value can be viewed from the outside.

  Patent Document 1 discloses a padlock that can confirm whether or not an unlocking that is not intended by an administrator is performed during locking, and that the unlocking frequency is displayed every time the locked lock is unlocked. Proposed. This padlock swings the hook body via the hook lever in conjunction with the axial movement of the locking arm accompanying locking and unlocking, and this swinging the pawl wheel attached to the rotation shaft end of the frequency indicator The teeth are rotated one tooth at a time and the display frequency is incremented by one.

Japanese Utility Model Publication No. 58-75867

  An object of the present invention is to provide a more compact and robust padlock with an unlocking frequency counter by a precise mechanism different from the conventional padlock.

Hereinafter, the present invention will be described with reference to the accompanying drawings, but the present invention is not limited thereto.
The padlock 1 of the present invention for solving the above problems includes a lock body 2, a shackle 3, a cylinder 4 lock provided in the lock body 2, a latch member 5, a counter dial 6, and a transmission mechanism 7. The lock body 2 has an opening of a first shackle receiving hole 22 and a second shackle receiving hole 23 on one end surface 21, and a display window 25 is opened on the front surface 24. The shackle 3 has a long leg portion 31 that can be received in the first shackle receiving hole 22 of the lock body 2 and a short leg portion 32 that can be received in the second shackle receiving hole 23. The long leg 31 is provided with a notch 33 in the shackle receiving hole 22, and the short leg 32 is pulled out of the lock body 2 in the extended position. The cylinder lock 4 includes a rotor 42 that is rotated between an unlocking position and a locking position by a key, and a cylinder case 41 that accommodates the rotor 42, and a key hole 42 a on one end side of the rotor 42 is inserted into a lock body. 2 is provided in the lock body 2 so as to be exposed at the other end face 26. The latch member 5 can be rotated forward and backward between the locking position and the unlocking position in conjunction with the rotor 52 of the cylinder lock 4, and is urged to the locking position and provided in the lock body 2, and is in the locking position. At this time, it engages with the notch 33 of the shackle 3 and restrains it in the retracted position. The counter dial 6 has continuous numerals 61a and 61b displayed at equal intervals in the circumferential direction on the outer periphery, and the lock body 6 is rotated by a predetermined angle in conjunction with the rotation of the rotor 42 in the unlocking direction. The number corresponding to the accumulated rotational speed of the rotor 42 is sequentially displayed on the outside from the display window 25 of the lock body 2 for each rotation. The transmission mechanism 7 is provided in the lock body 2 so as to transmit the rotation of the rotor 42 in the unlocking direction to the counter dial 6. The cylinder lock 4 is fixed in the lock body 2 with the rotation axis of the rotor 42 arranged parallel to the axis of the long leg portion 31 of the shackle, and the other end of the rotor 42 protruding from the cylinder case 41. The latch member 5 includes a main body 51 and a shaft portion 52, and the main body 51 includes a latch portion 51 b that can be freely engaged with and disengaged from the notch 33 of the shackle 3, and rotates integrally with the rotor 42 on the other end side of the rotor 42. To be combined. The shaft portion 52 extends from the main body 51 along the rotational axis of the rotor 42 to one end side of the lock body 2 and is pivotally supported by the lock body 2. The counter dial 6 is given a predetermined rotational resistance, is rotatably supported around the shaft portion of the latch member 5, and has a coaxial ratchet gear portion 62. The ratchet gear portion 62 has a number of tooth grooves 62 a and 62 b corresponding to the number of numerical displays 61 a and 61 b on the outer periphery of the counter dial 6. The transmission mechanism 7 includes a holding member 71, a shaft member 72, and a ratchet claw member 73. The holding member 71 is coupled to the latch member 5 so as to rotate integrally with the latch member 5. The shaft member 72 is supported by the holding member 71 in parallel with the shaft portion 52 of the latch member 5. The ratchet pawl member 73 is pivotally supported by the shaft member 72, engages with the ratchet teeth of the counter dial 6, and rotates the counter dial 6 by a predetermined angle when the rotor 42 rotates in the unlocking direction. Change the display to increase.

  An object of the padlock 1 of the present invention is to provide a padlock with a compact and robust unlocking frequency counter.

It is a front view of a padlock with an unlocking power counter according to the present invention. It is sectional drawing seen from the back side of the padlock with an unlocking frequency counter of FIG. It is a cross-sectional top view of the padlock with an unlocking frequency counter of FIG. It is a bottom view of the padlock with an unlocking frequency counter of FIG. The counter dial in the padlock with the unlocking | counting frequency counter of FIG. 1 is shown, (A) is the front view which notched one part, (B) is a top view. The latch member in the padlock with an unlocking frequency counter of FIG. 1 is shown, (A) is a top view, (B) is sectional drawing, (C) is a bottom view. The holding member in the padlock with an unlocking frequency counter of FIG. 1 is shown, (A) is a top view, (B) is a front view. The ratchet nail | claw member in the padlock with an unlocking frequency counter of FIG. 1 is shown, (A) is a top view, (B) is a front view. The shaft member and spring in the padlock with an unlocking frequency counter of FIG. 1 are shown, (A) is a top view, (B) is a front view. It is a top view explaining operation | movement of the counter dial and transmission mechanism in the padlock with an unlocking frequency counter of FIG.

Embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 2, the padlock 1 includes a lock body 2, a shackle 3, a cylinder lock 4 provided in the lock body 2, a latch member 5, a counter dial 6, and a transmission mechanism 7.

  The lock body 2 has an opening of a first shackle receiving hole 22 and a second shackle receiving hole 23 on one end face 21, and a display window 25 is opened on the front face 24 as shown in FIGS.

  The shackle 3 has a long leg portion 31 that can be received in the first shackle receiving hole 22 of the lock body 2 and a short leg portion 32 that can be received in the second shackle receiving hole, and is in a retracted position (locking position). It is movable in the axial direction between the extended position (unlocked position) and is biased to the extended position by a spring 34. The long leg portion 31 has a notch 33 in the shackle receiving hole 22. Stopper pins 34 that come into contact with both ends of the notch 33 to prevent the shackle 3 from falling off are fixed to the lock body 2 so as to partially protrude into the shackle receiving hole 22. The short leg portion 32 can be pulled out from the lock body 21 in the extended position and release the locked member restrained by the shackle 3.

  The cylinder lock 4 includes a rotor 42 that is rotated between an unlocking position and a locking position by a key (not shown), and a cylinder case 41 that houses the rotor 42 and a locking mechanism (not shown). The cylinder lock 4 is provided in the lock body 2 with the key hole 42 a on one end side of the rotor 42 exposed to the other end surface 26 of the lock body 2. The rotor 42 is disposed such that the rotation axis thereof is parallel to the axis of the long leg portion 31 of the shackle, and the angular shaft portion 42 b on the other end side protrudes from the cylinder case 41.

The latch member 5 can be rotated forward and backward between the locked position and the unlocked position in conjunction with the rotor 42 of the cylinder lock 4, and is provided in the lock body 2 by being biased to the locked position by a spring 54. The latch member 5 includes a flat plate-like main body 51 and a shaft portion 52 extending vertically from the main body 51.

  As shown in FIG. 6, the main body 51 of the latch member includes a square hole portion 51a that fits into the square shaft portion 42b of the rotor 42, a latch portion 51b that can be engaged and disengaged with the notch 33 of the shackle 3, and a spring receiving recess 51c. Have

  The shaft portion 52 of the latch member extends from the main body 51 along the rotational axis of the rotor 42 to one end side of the lock main body 2 and is pivotally supported by the lock main body 2 with a pivot pin 53.

  The latch portion 51b is provided so as to protrude laterally from the main body 51. When the latch member 5 is in the locking position, the latch portion 51b engages with the notch 33 of the shackle 3 to restrain it in the retracted position (locking position). When in the unlocked position, the shackle 3 is released from the notch 31a.

  The counter dial 6 is provided in the lock body 2 so as to rotate by a predetermined angle in conjunction with the rotation of the rotor 42 in the unlocking direction, and the number of times of unlocking is accumulated and displayed from the display window 25. In order to display the number of times of unlocking up to two digits, the counter dial 6 is provided with a counter dial 6a for displaying the 1's place and a counter dial 6b for displaying the 10's place so as to overlap each other in FIG. It is done. As shown in FIG. 5, the counter dial 6 includes a disk-shaped display portion 61 and a ratchet gear portion 62 formed so as to protrude upward coaxially therewith, and a shaft portion 52 of the latch member is formed at the center. A bearing hole 63 for receiving the light passes through. Therefore, the counter dial 6 is rotatable relative to the shaft portion 52 of the latch member 5 around the axis, but a predetermined rotational resistance is given by the leaf spring 64.

  The display unit 61 has continuous numbers 61 a displayed at equal intervals in the circumferential direction on the outer periphery at regular intervals, and displays a number 61 a corresponding to the accumulated number of rotations of the rotor 42 for each rotation from the display window 25 of the lock body 2. Display sequentially outside.

  The ratchet gear unit 62 has a number of tooth grooves 62 a and 62 b corresponding to the number of the numerical display 61 a on the outer periphery of the display unit 61. Only one tooth groove 62b is formed deeper than the other plurality of tooth grooves 62a.

  The transmission mechanism 7 is provided in the lock body 2 so as to transmit the rotation of the rotor 42 in the unlocking direction to the counter dial 6. The transmission mechanism 7 includes a holding member 71 (FIG. 7), a shaft member 72 (FIG. 9), and a ratchet claw member 73 (FIG. 8).

  The holding member 71 includes a pair of parallel support pieces 71a disposed so as to sandwich the two counter dials 6a and 6b, and a connection portion 71b that connects the two support pieces 71a. The support piece 71 a is coupled to the latch member 5 so as to rotate integrally with the latch member 5.

  The shaft member 72 extends between the support pieces 71a of the holding member 71 in parallel with the shaft portion 52 of the latch member, and is supported by the main body 51 of the latch member at one end.

  The ratchet pawl member 73 is pivotally supported by the shaft member 72. That is, the ratchet pawl member 73 includes a pair of opposed bearing pieces 73a that overlap the inner side surfaces of the two support pieces 71a of the holding member 71, a connection portion 73b that connects the two bearing pieces 73a, and a counter portion that is connected to the counterpiece 73b. A pair of engaging claws 73c and 73d that extend toward the ratchet gear portion 62 of the dials 6a and 6b and engage with the tooth grooves 62a and 62b are provided. The ratchet pawl member 73 is rotationally biased by the spring 74 supported by the shaft member 72 in a direction in which the engaging claws 73c and 73d are engaged with the tooth grooves 62a and 62b. Therefore, when the rotor 42 rotates in the unlocking direction, the engaging claws 73c and 73d push the counter dials 6a and 6b by one tooth of the ratchet gear portion 62 and rotate them by a predetermined angle, whereby the numerical display exposed from the display window 61a is changed in the increasing direction.

  In the illustrated embodiment, two counter dials 6a and 6b can display a numerical value up to two digits, up to “99”. The counter dial 6a represents the place of 1 and 6b represents the place of 10. The engaging claw 73c of the ratchet claw member 73 engages with the tooth groove 62 of the 1st place counter dial 6a, and the other engaging claw 73d engages with the tooth groove 62 of the 10th place counter dial 6b. . The engaging claw 73d is bent and has a tip positioned radially outward of the gear portion 63 with respect to the other engaging claw 73c. At a position corresponding to the tooth groove 62a, the tooth groove 62a of the tenth place dial 6b. The tip does not come into contact with. Therefore, as shown in FIG. 10, when the cylinder lock 4 is unlocked on the assumption that the display of the first place is “8” and the display of the tenth place is “0” in the state of (A), The engagement claw 73c hanging on the tooth groove 62a of the 1st place counter dial 6a pushes the teeth, and as shown in (A), the 1st place display is advanced to "9". Since the tenth place dial 6b is disengaged from the teeth, the tenth place display remains “0”. In the state (A), the engaging claws 73c and 73d are both engaged with the deep tooth groove 62b, and both tips abut against the teeth. Accordingly, when the next unlocking operation is performed from this state, the engaging claws 73c and 73d push the teeth, respectively, to push the display of the first place to “0” and to push the display of the tenth place to “1”, Carry is performed.

  A key (not shown) for operating the rotor 42 cannot be removed from the rotor 42 in the unlocked position.

  When the padlock 1 is used, it is first unlocked using a key (not shown). When a key is inserted into the key hole 42 of the rotor 42 and the rotor 42 is rotated in the unlocking direction, the latch portion 51b is detached from the notch 33 of the shackle 3, and the shackle 3 is in the extended position where it is unlocked by the spring 34. Protrusively. The key remains plugged into the rotor 42. In this state, for example, the shackle 3 is hung on a locked member such as a container door, and the rotor 42 is rotated in the locking direction by a key while the shackle 3 is pushed into the retracted position, which is the locking position, and the latch portion 51b is moved to the shackle 3 After engaging with the notch 33, the key is removed from the rotor 42 to complete the locking. At this time, the integrated value of the current number of times of unlocking displayed from the display window 25 is recorded, and this value is notified to the transport destination. When the locked container reaches the destination, look at the value displayed in the display window 25 of the padlock 1 before unlocking the door. It can be confirmed that it is not locked. When unlocked, the latch member 5 and the holding member 71 rotate together with the rotor 42 in the unlocking direction, and the counter dial 6 rotates through the shaft member 72 and the ratchet pawl member 73 so as to add the display numerical value. The method of using the padlock 1 is not limited to the above, and various specific methods of use can be devised at the site where security is enhanced by managing the number of times of unlocking.

DESCRIPTION OF SYMBOLS 1 Padlock 2 Lock main body 21 One end surface 22 of a lock main body 1st shackle receiving hole 23 2nd shackle receiving hole 24 Front surface 25 of a lock main body Display window 26 The other end surface 3 of a lock main body 3 Shackle 31 Long leg part 32 Short leg part 33 Notch 34 Spring 35 Stopper pin 4 Cylinder lock 41 Cylinder case 42 Rotor 42a Key hole 42b Square shaft portion 5 Latch member 51 Latch member body 51a Square hole 51b Latch portion 51c Spring receiving recess 52 Shaft portion 53 Pivot pin 54 Spring 6 Counter dial 6a 1-digit counter dial 6b 10-digit counter dial 61 Display unit 61a 1-digit number 61b 10-digit number 62 Ratchet gear portion 63 Bearing hole 64 Leaf spring 7 Transmission mechanism 71 Holding member 72 Shaft member 73 Ratchet claw Member 73a Engaging claw 73b Engaging claw 74 Spring

Claims (1)

A padlock equipped with a counter that displays a numerical value representing the number of times of unlocking from a display window so that it can be viewed from the outside,
The display window has one end surface having openings of the first shackle receiving hole and the second shackle receiving hole, the other end surface on the opposite side, a front surface, a rear surface, and left and right side surfaces connecting the both end surfaces. A lock body that opens,
The lock body has a long leg portion that can be received in the first shackle receiving hole and a short leg portion that can be received in the second shackle receiving hole, and is movable in the axial direction between the retracted position and the extended position. Urged to the extended position, the long leg is provided with a notch in the shackle receiving hole, and the short leg is a shackle pulled out of the lock body in the extended position;
A rotor that is rotated between an unlocking position and a locking position by a key; and a cylinder case that houses the rotor; and a key hole on one end side of the rotor is exposed on the other end surface of the lock body to A cylinder lock provided in the body,
The notch of the shackle can be rotated in the forward and reverse directions between the locked position and the unlocked position in conjunction with the rotor of the cylinder lock and biased to the locked position and provided in the lock body. A latch member that engages with and restrains it in the retracted position, and when the unlocked position together with the rotor is released from the notch to release the shackle;
The outer periphery has continuous numbers displayed at equal intervals in the circumferential direction at a predetermined angle, and is provided in the lock body so as to rotate by a predetermined angle in conjunction with the rotation of the rotor in the unlocking direction. A counter dial for sequentially displaying numbers corresponding to the accumulated rotational speed of the rotor to the outside from the display window of the lock body;
A transmission mechanism provided in the lock body so as to transmit the rotation in the unlocking direction of the rotor to the counter dial;
The cylinder lock is disposed in parallel with the axis of the long leg portion of the shackle, and the other end of the rotor protrudes from the cylinder case and is fixed in the lock body.
The latch member has a main body and a shaft portion. The main body has a latch portion that can be freely engaged with and disengaged from the notch of the shackle, and is coupled to the other end of the rotor so as to rotate integrally with the rotor. The part extends from the main body to the one end side of the lock body along the rotation axis of the rotor and is pivotally supported by the lock body.
The counter dial is provided with a predetermined rotation resistance and is rotatably supported around the shaft portion of the latch member. The counter dial has a coaxial ratchet gear portion having a number of teeth corresponding to the number indicated on the outer periphery. ,
The transmission mechanism includes a holding member coupled to the latch member so as to rotate integrally with the latch member, a shaft member supported by the holding member in parallel with the shaft portion of the latch member, and pivotally supported by the shaft member. A ratchet claw member that engages with the ratchet teeth of the counter dial and rotates the counter dial by a predetermined angle when the rotor rotates in the unlocking direction to change the numerical display exposed from the display window in the increasing direction. A padlock with an unlocking frequency counter.

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