JP5383445B2 - Locking device for hinged door - Google Patents

Description

  The present invention relates to a locking device for a hinged door such as a front through hinged door in a railway vehicle.

  2. Description of the Related Art Conventionally, a lock device for preventing an opening door from being opened carelessly when not in use is known.

  For example, as shown in FIG. 8, a plate-shaped lock seat 103A is provided on the side of the hinged door 102 as a locking device 103 of a front through hinged door 102 that is provided on a railcar body (not shown) so as to be opened and closed via a hinge 101. The latch 103B is attached to the lock seat 103A so as to be rotatable in a plane parallel to the lock seat 103A, the latch 103B is rotated with the hinged door 102 closed, and the vehicle body (door frame) side is rotated. There is one that can be engaged with a received metal (not shown) to restrict the opening of the hinged door 102 or can be released to allow the hinged door 102 to be opened.

  In the locking device 103, the latch 103 </ b> B cannot be rotated freely even in a state where the latch 103 </ b> B is engaged with the receiver and the opening of the hinged door 102 is restricted or in a state where the engagement is released and the hinged door 102 can be opened. Can be locked (in the locked state).

  Therefore, just by checking whether the latch 103B is engaged with the receipt, the latch 103B is locked and cannot be rotated, or the lock 103B is unlocked and can be rotated. Cannot judge whether there is.

  Therefore, in order to confirm whether or not such a lock device is in the latch lock state, it is necessary to check whether or not the latch is actually touched and rotated, and there is a problem that it takes time and effort to confirm.

  By the way, a lock display device that can easily determine whether the lock device is in a locked state or an unlocked state is already known (see, for example, Patent Document 1).

  In the technique described in Patent Document 1, a decorative plate is provided in front of a substantially oval base member, and a display window, a keyhole, and a door handle are arranged on the decorative plate from above, and a key is inserted into the keyhole to the left. The screen is locked by turning it, and the display panel that is partially viewed from the circular display window rotates, and the red colored part indicating the locked state is displayed on the display window. .

JP 2007-16426 A (pages 3 to 4, FIGS. 1 to 4)

  However, the door locking device as described above can be in the latch lock state or the latch release state even when the latch 103B is engaged with the receiver or the engagement with the receiver is released. Therefore, the technique described in Patent Document 1 that does not use such a latch cannot be applied as it is. In addition, if the structure described in Patent Document 1 is to be applied to the door locking device as described above, it is necessary to provide a dedicated display window separately from the keyhole.

  The present invention is different from the keyhole by additionally attaching only a part (display board) showing the state of the latch that is visible from the keyhole to what is currently used as many locking devices for front hinged doors. It is an object of the present invention to provide a door locking device that can easily determine whether a latch is in a locked state or an open state without providing a display window.

  In order to solve the above-mentioned problems, the hinged door locking device according to claim 1 is a lock seat fixed to either the front or back surface of the hinged door and having a keyhole, and parallel to the front and back surfaces of the hinged door on the front surface side of the lock seat. A latch that is rotatably mounted within the surface, a stopper that is provided on the back side of the lock seat and that is provided on the latch so as to rotate integrally with the latch, and on the back side of the lock seat, A lock provided rotatably at a position corresponding to the keyhole and releasably engaged with a key inserted from the keyhole, and the latch is detachably engaged with a receiver provided on the door frame side. Thus, the opening of the hinged door is restricted, and the lock is rotated to the clasp by rotating the lock with the key while the key is engaged with the lock. Engagement between the latch lock state that engages and restricts rotation of the latch, and the stopper A locking device for a hinged door that can be selectively released from a latch release state that allows the latch to rotate, and the keyhole extends in a radial direction from the round hole portion located at the center. A ring-shaped display plate having a pair of radially extending slits on the keyhole side surface of the lock, the center of which is a center of rotation of the lock When the lock is in a latch lock state or a latch release state, the cut portion is positioned to face either one of the pair of insertion holes. .

  According to the hinged door locking device according to claim 1 having the above-described configuration, it is possible to easily determine whether the latch is in the latch lock state or the latch release state by looking at the display plate through the keyhole, regardless of the latch state. can do. That is, it is not necessary to actually touch the latch in order to confirm whether the latch is in the latch release state or the latch lock state.

  Further, when in the latch lock state, the cut portion of the display plate is located opposite to the one insertion hole portion of the key hole, and the display plate closes the other insertion hole portion. On the other hand, when the latch is in an open state, the cut portion of the display plate is located opposite to the other insertion hole portion of the key hole, and the display plate blocks the one insertion hole portion. Since it will be in a state, it can be confirmed in which state it is by visually observing a display board through a keyhole, without touching the said latch. In addition, by making the insertion hole part closed with the display board, the display board has a role as a baffle plate to prevent the key from being inserted into the wrong insertion part. Incorrect insertion can be prevented.

  According to claim 2, the display board is clearly differentiated by being colored and / or finished so that it can be clearly distinguished visually. When the is in the latch lock state or the latch release state, it is desirable that the colors visually recognized through the pair of insertion holes are different.

  In this way, it becomes easier to determine whether the latch is locked or the latch is released.

  According to a third aspect of the present invention, the latch includes a first engagement that maintains the state in which the latch is engaged with the receiver by engaging the engaging portion of the lock so as to be detachable. A structure having a recess and a second engagement recess for maintaining the state where the latch is disengaged from the receiver by engaging the engaging portion of the lock with a latch. The

  In this way, even if the latch is engaged with the receiver or the latch is released from engagement with the receiver, the latch is easily locked. be able to.

  In the present invention, whether the latch is locked or the latch is released can be easily determined visually by looking at the display plate through the keyhole without touching the latch. Whether it is in an open state can be easily determined, and erroneous key insertion can be prevented.

1 shows an embodiment of a locking device for a hinged door according to the present invention, in which (a) is a front view in a latch lock state, (b) is a plan view (c) is a front view in a latch release state. (A) is a rear view of the hinged door locking device showing a state in which the attachment lock cover is removed, and (b) is a rear view of the hinged door locking device showing a state in which the attachment lock mounting cover is attached. It is a rear view which shows the latch release state of the said door lock apparatus. It is a rear view which shows the latch lock state of the said door lock apparatus. (A) is a perspective view of the state which attached the indicator to the lock of the said door locking device. (B) is the front view of the said indicator, (c) is a figure similar to FIG.5 (b) which shows another embodiment about an indicator. It is a side view which shows the key of the said door lock apparatus. The door locking device which concerns on another embodiment is shown, (a) is a front view which shows the door locking device of a latch lock state, (b) is a front view which shows the door lock device of a latch release state. It is explanatory drawing of the front through hinged door in a rail vehicle.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a hinged door locking device according to the present invention will be described with reference to the drawings.

  As shown in FIGS. 1 (a), (b), (c) and FIGS. 2 (a), (b), the hinged door locking device 1 is fixed to either the front or back surface of the hinged door to form a keyhole 9 (through hole). A rectangular plate-shaped lock seat 2, a bar-shaped latch 4 attached to the front surface of the lock seat 2 in a plane parallel to the front and back surfaces of the hinged door, and the back surface of the lock seat 2 A lock 21 provided integrally connected to the latch 4 and a key 60 (see FIG. 6) which is rotatably provided at a position corresponding to the key hole 9 on the back side of the lock seat 2 and is inserted from the key hole 9 (see FIG. 6). As is well known, depending on the engagement state between the stopper 21 connected to the latch 4 and the stopper 36 rotated by the key 60, the latch lock state or The latch release state can be taken selectively. In the latch lock state, the rotation of the latch 4 (stopper 21) is regulated, and in the latch release state, the rotation of the latch 4 (stopper 21) is allowed. Note that the latch 4 is configured to be engaged with a receiving frame 3 on the door frame side where the hinged door is provided so that it can be opened and closed, thereby restricting inadvertent opening of the hinged door.

  The lock seat 2 is a cast product formed in a rectangular shape. Fixing screw holes 5 are formed at the four corners, respectively, and a latch 4 is rotatably attached to a central portion. An annular latch base 8 is formed on the surface of the lock seat 2, and a key hole 9 is formed therebelow. The key hole 9 includes a round hole portion 10 located at the center, and a pair of insertion hole portions 11 and 12 formed in a cutout shape extending in the radial direction continuously to the round hole portion 10. These insertion hole portions 11 and 12 are provided on the left side and the lower side of the round hole portion 10 when viewed from the front surface side (see FIGS. 1A and 1C). One insertion hole portion 11 corresponds to the insertion portion of the key 60 in the latch release state, and the other insertion hole portion 12 corresponds to the insertion portion of the key 60 in the latch lock state.

  On the other hand, the latch 4 is a rod-shaped part whose main part has a substantially rectangular cross section, and the base end part serving as the rotation center is formed in a circular shape when viewed from the surface side, and on the surface side of the base end part, A square columnar tool engaging portion 14 is provided so as to protrude, and a mounting shaft (not shown) is provided on the back surface side. The mounting shaft penetrates the lock seat 2 from the front surface side and protrudes to the back surface side, and a stopper 21 is integrally fixed to the protruding portion with a screw 24 (see FIG. 1B).

  On the back side of the lock seat 2, as shown in FIG. 2A, the lock 36 can be rotated at a portion corresponding to the keyhole 9, and the stopper 21 can be rotated integrally with the latch 4 on the upper side. Are provided respectively.

  The clasp 21 has a substantially circular outer shape, and is a first and a first that serve as rotation restricting portions whose rotation is restricted by engagement with the lock 36 at locations facing each other across the screw 24 in the diameter direction. Two engaging recesses 27A and 27B are formed.

  Further, as shown in FIG. 1 (b), the engaging portion 28 on the front surface side of the clasp 21 rotates in the direction to unlock the latch 4 with respect to the stopper 29 on the back surface side of the lock seat 2 so It engages when it is in a state of facing and when it is rotated in the direction of locking the latch 4 and is facing down, and the rotation of the latch 4 is restricted.

  As shown in FIGS. 2 (a) and 5 (a), the ninja lock 36 is cut along a straight line connecting both ends of the arc at a position opposite to the chevron 38 protruding outward in the radial direction. A cut-out portion 39 is provided. The mountain-shaped protrusion 38 has a shape in which the thickness is reduced by cutting about half of the thickness on the back side. In addition, the engagement portion 69 located between the chevron 38 and the cutout portion 39 in the ninja lock 36 is engaged with the engagement recess 27A or 27B of the clasp 21 of the latch 4, and the latch 4 is not rotated. It is like that.

  In the first engaging recess 27A, the engaging portion 69 of the lock 36 is detachably engaged so that the rotation of the latch 4 is restricted, and the latch 4 is engaged with the receiver 3 of the door frame. While the state is maintained, the second engaging recess 27B is engaged with the engaging portion 69 of the lock 36 so as to be detachable, so that the rotation of the latch 4 is restricted and the latch 4 is engaged with the receiver 3. It is configured to maintain a state in which the combination is released. As a result, even when the latch 4 is engaged with the receiver 3 or when the latch 4 is disengaged from the receiver 3, the engaging portion 69 of the lock 36 is engaged. By engaging with the combined recesses 27A and 27B, the latch 4 can be brought into a latch lock state in which the latch 4 cannot be rotated.

  As shown in FIG. 2 (a), a plate-like cover mounting portion 31 having a thickness is provided in the vertical direction on the left side of the lock 36 as viewed from the back side. On the other hand, a cylindrical cover attaching portion 33 is provided on the right side of the ninja lock 36. In the vicinity of the lower side of the cover mounting portion 33, a quadrangular prism-like spring locking portion 35 is projected.

  Further, as shown in FIGS. 2 (a) and 5 (a), round protrusions 41 and 42 are formed on the front and back surfaces 37 and 40 of the pill lock 36, respectively. 41 and 42 are formed in a substantially circular cross-sectional shape perpendicular to the protruding direction, and the inside of the round protruding portion 41 on the front surface 37 side is cut in the back surface direction while leaving the peripheral edge portion and the central portion. In addition, by leaving a predetermined thickness on the back surface 40 side, the concave key locking portion 43 is formed, while the central portion is formed in a cylindrical shape, and the fitting portion for engaging the tip portion of the key 60 44. And when it sees from the surface 37 side and arrange | positions the mountain-shaped protrusion 38 toward the 9 o'clock position in the clockwise direction, the range which becomes a 6 o'clock position-9 o'clock position centering on the fitting part 44 The key locking part 45 is provided by removing the circular protrusions on both sides and forming a fan-shaped through hole.

  The ninja lock 36 is arranged in a state where it is fitted inside the pill lock pedestal (not shown) of the lock seat 2 and, as shown in FIG. The lock mounting cover 49 is attached to the lock seat 2 by screwing it to the cover mounting portions 31 and 33. The attachment cover 49 for the lock is formed in a substantially rectangular plate shape, and is provided with a circular opening 50 having a size corresponding to the round protrusion 42 on the back surface 40 of the lock 36. 50 is a state in which the round protrusion 42 is fitted. Further, the stopper mounting cover 49 has a pair of stoppers 51 and 52 for restraining rotation within a predetermined range by coming into contact with the mountain-shaped protruding portion 38 of the stopper 36 on the surface side. Is provided so as to be opposed to each other (see FIGS. 2A and 2B). As a result, the movable range of the lock 36 is a range from the 6 o'clock position to the 9 o'clock position of the mountain-shaped protrusion 38 in the clockwise direction when viewed from the front side.

  The ninja lock 36 is urged by a belt-like plate spring 54 so as not to rotate carelessly. The leaf spring 54 is wound around and attached to the cover attaching portion 33 so as to be positioned between the lock 36 and the spring engaging portion 35. Then, one piece (short piece) of the leaf spring 54 is brought into contact with the spring locking portion 35, and the other piece (long piece) is brought into contact with the ninja lock 36, and the ninja 36 constantly receives the urging force of the leaf spring 54, It prevents it from rotating carelessly.

  As shown in FIGS. 5 (a) and 5 (b), a thin indicator (display plate) 46 is attached to the distal end surface of the round-shaped protruding portion 41 on the front side of the pouch 36 formed in this way. Has been. The indicator 46 is made of an annular flat plate member having substantially the same diameter as the round protrusion 41, and has a round hole 47 formed at the center thereof and a cut portion 48 formed at a part thereof. It is a mold shape. The indicator 46 is arranged so that the cut portion 48 coincides with the chevron 38 in a state where the center coincides with the center of rotation (fitting portion 44) of the lock 36.

  As shown in FIG. 6, the key 60 used in the locking device 1 has an L-shaped shape that is projected outwardly in the radial direction and then bent forward on the outer peripheral surface of the tip portion of the shaft 61 having a circular cross section. A protrusion 62 is provided, and an annular knob 63 is provided at the base end.

  The operation of the hinged door locking device 1 described above will be described.

  FIGS. 1A and 1B and FIGS. 2A and 2B show a latch lock state in which the latch 4 is engaged with the receiver 3. In this state, the latch 4 is engaged with the receiver 3 on the door frame side, the cut portion 48 of the indicator 46 is positioned so as to face the insertion hole 11 on the upper side of the key hole 9, and the lower insertion hole Part 12 is blocked by indicator 46. Thus, by visually observing that the lower insertion hole 12 is blocked by the indicator 46, the rotation of the stopper 21 is restricted by the engagement relationship between the lock 36 and the stopper 21. It can be seen that the latch 4 is in a latch lock state where it does not rotate, which is advantageous in preventing erroneous insertion of the key 60.

  Then, when the key 60 is inserted into the upper insertion hole portion 11 with the projection 62 facing sideways, the tip end portion is inserted into the key locking portion 43 of the ninja lock 36, and the fitting portion 44. And the tip of the protrusion 62 is inserted into the key locking portion 43. Then, the key 60 is rotated 90 ° counterclockwise, the tip of the protrusion 62 is hooked inside the key locking portion 43, and further, the key 60 is rotated 90 ° counterclockwise. The lock 36 itself is rotated 90 ° to release the latch. When the latch is released, as shown in FIG. 3, the cut-out portion 39 of the lock 36 faces the lock 21, and the engagement state between the lock 36 and the lock 21 is released. At this time, the upper insertion hole portion 11 is closed by the indicator 46, while the cut 48 of the indicator 46 is positioned to face the lower insertion hole portion 12.

  As a result, the latch 4 becomes rotatable, so that the tool is engaged with the tool engaging portion 14 of the latch 4 and rotated counterclockwise to engage the latch 4 with the receiver 3. (See the solid line in FIG. 1C and FIG. 3).

  Thus, it can be known by visually observing which insertion hole portions 11 and 12 are blocked by the indicator 46 whether the latch is in the latch lock state or the latch release state.

  Further, when the latch 4 is disengaged from the catch 3, as shown in FIG. 4, if the engagement portion 69 of the lock 36 is engaged with the engagement recess 27 </ b> B, the rotation of the latch 4 is performed. The lock is locked.

  Therefore, whether the latch is locked or the latch is released can be confirmed by visually observing the indicator 46 through the keyhole 9 without touching the latch 4.

  The indicator 46 is color-coded so that when the lock 36 is in the latch lock state or the latch release state, the colors visually recognized through the pair of insertion holes 11 and 12 are different, It is also possible to easily distinguish the latch release state. For example, as shown in FIG. 5C, in the state where the cut portion 48 is directed sideways, if the upper half of the indicator 46A is colored, for example, blue, and the lower half is colored, for example, red, As shown in FIG. 7 (a), the red portion 67 is visually observed through the lower insertion hole 12, and in the latch open state, as shown in FIG. 7 (b), the upper insertion hole 11 Through this, the blue portion 68 is visible.

  Of course, the lock according to the present invention can be applied not only to the front through door in a railway vehicle but also to other hinged doors.

DESCRIPTION OF SYMBOLS 1 Locking device for hinged doors 2 Lock seat 3 Receipt 4 Clasp 9 Key hole 11,12 Insertion hole part 21 Clasp 27A, 27B Engagement recessed part 28 Engagement part 36 Pill lock 43 Key lock part 46 Indicator (display board)
48 Cut part 60 Key 67 Red part 68 Blue part 69 Engagement part

Claims (3)

A lock seat that is fixed to either the front or back surface of the hinged door and has a key hole, a latch that is rotatably attached to the front surface of the lock seat in a plane parallel to the front and back surfaces of the hinged door, and the back surface of the lock seat And a lock provided on the latch so as to rotate integrally with the latch, and a key that is rotatably provided at a position corresponding to the key hole on the back side of the lock seat and that is inserted from the key hole. And a latch that removably engages, and the latch restricts the opening of the hinged door by releasably engaging with a receiver provided on the door frame side, and the key is By rotating the lock with the key in a state of being engaged with the lock, the lock is engaged with the lock to lock the lock, and the lock is locked. The latch is released and the latch is released to allow the latch to rotate. A hinged door for the lock device which can be taken in,
The keyhole includes a round hole portion located in the center and a pair of insertion hole portions extending in the radial direction from the round hole portion,
An annular display board having one slit extending in the radial direction is fixed to the surface of the lock on the keyhole side so that the center thereof coincides with the rotation center of the lock, and the lock is latched. The hinged door locking device, wherein the cut portion is located at a position facing either one of the pair of insertion holes when in the locked state or the latch release state.
The display board is colored and / or finished so that it can be clearly distinguished visually, and both are processed so as to clearly differentiate the lock so that the lock is in the latch lock state or the latch release state. 2. The hinged door locking device according to claim 1, wherein the color visually recognized through the pair of insertion holes is different.
  The latch has a first engagement recess for maintaining the state where the latch is engaged with the catch by engaging the engaging portion of the lock so as to be detachable, and the engagement of the lock 3. The second engaging recess according to claim 1, wherein the latch includes a second engaging recess that maintains a state in which the engagement with the receiving member is released by engaging the portion removably. 4. Locking device for hinged door.

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