JP2009292633A - Device for detecting opening/closing condition of door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for detecting lock condition of a door, which can surely prevent a contact point failure by preventing intrusion of foreign materials into a contact point part and generation of rust therein. <P>SOLUTION: A door lock device 1 is structured of: a lock lever (a moving member)2 for locking a door by moving with the door closing operation so as to lock a hook part (a lock claw) 20 with a case (a wall side member) 3; a piston 6 having a through-hole (an engagement part)60 to be engaged with a tip of the lock lever 2 and capable of going ups and downs inside a guide member 5 provided in a wall so as to be moved downward by the lock lever 2 through the through-hole 60 when locking the door with the lock lever 2; and contact points 5A and 6A for monitoring lock condition of the door, which is provided to be short-circuited by action of a lower end of the piston 6 when locking the door inside a cylindrical part of the guide member 5 so as to detect the lock condition of the door for monitoring. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a door open / close state detection device, and more particularly to a door lock state detection device, and more particularly, to an improved structure for preventing contact failure by preventing foreign matter from entering a contact portion and generating rust.

  As a conventional door lock state detection device, for example, an elevator door device as shown in Japanese Utility Model Publication No. 1-38666 is interlocked with a closing operation of an elevator car door (inner door) at a landing door (outer door). An actuating body (locking lever) which is provided so as to be rotatable by the action of an engaging plate that moves in a moving manner, has a hook for door locking, and has a protrusion as a short-circuit contact for detecting completion of door locking at the tip. And a case that is provided on the wall side of the landing and has a locked portion that can lock the collar of the operating body, and a contact that contacts the protrusion of the operating body when the door is locked.

In this case, when the car door of the elevator is to be closed, the operating body is rotated by the action of the engagement plate that moves in conjunction with the closing operation of the car door, so that the cage of the operating body is The door is locked by being locked to the locked portion. Further, when the door is locked, the protrusion at the tip of the operating body contacts the contact in the case and short-circuits, thereby detecting that the door lock is completed.
Japanese Utility Model Publication 1-36866 (see FIG. 1)

  However, in the conventional structure, the protrusions (contacts) at the tip of the operating body are exposed, and the contacts in the case are also in a state of communicating with the space outside the case through an opening formed in the case. For this reason, foreign substances such as dust and insects in the elevator hoistway are likely to adhere to these contacts, and the contacts are easily rusted by being exposed to the air. As described above, the conventional apparatus has a problem that contact failure is likely to occur due to adhesion of foreign matter to the contact or generation of rust.

  Such a contact failure leads to a serious accident, particularly in an elevator door lock device. For example, although the door is open, it is determined that the door is closed due to a contact failure, and the car starts to move up and down, which may cause personal injury.

  The present invention has been made in view of such a conventional situation, and the problem to be solved by the present invention is a door that can reliably prevent contact failure by preventing entry of foreign matter into the contact portion and generation of rust. An object of the present invention is to provide an open / closed state detection device.

  A door open / close state detection device according to a first aspect of the present invention is provided on the first door side, moves in conjunction with the opening / closing operation of the first door, and the second door that opens / closes together with the first door. A reciprocating piston that is provided on the door side or provided on a wall-side member, has an engaging portion that can be engaged with the moving member, and is driven by the moving member via the engaging portion; It has a cylindrical part that slidably supports one end face of the piston, and a guide member that guides the movement of the piston and a short circuit due to the action of one end face side of the piston when the door is closed inside the cylindrical part of the guide member And a first door opening / closing state monitoring contact for detecting and monitoring the door opening / closing state.

  According to the first aspect of the present invention, when the door is closed, the moving member moves in conjunction with the closing operation of the first door and engages with the engaging portion of the piston. The piston is driven to reciprocate inside the guide member. Then, the first door opening / closing state monitoring contact is short-circuited inside the cylindrical portion of the guide member by the action of one end face side of the piston. As a result, the door open / closed state is detected and monitored.

  In this case, the first door opening / closing state monitoring contact is provided inside the cylindrical portion that slidably supports one end face of the reciprocable piston, and therefore, the contact is exposed. Neither is it exposed to the outer space. As a result, it is possible to reliably prevent foreign matters such as dust and insects from adhering to the contact and rust to be generated at the contact, and as a result, contact failure can be reliably prevented.

  According to a second aspect of the present invention, in the first aspect, the moving member has a lock claw for locking the first door to the second door or the wall member, and the second door or the wall member. However, it has a to-be-latched part which a lock nail | claw latches, and the 1st door open / close state monitoring contact detects and monitors the door lock state when the first door is locked.

  In this case, since the locked state of the first door is detected and monitored by the first door opening / closing state monitoring contact, the contact can be used as the door locking state monitoring contact.

  According to a third aspect of the present invention, in the first aspect, the piston is restricted from moving toward the first door opening / closing state monitoring contact inside the guide member, and the piston is held at a predetermined position inside the guide member. As described above, a piston movement restricting member provided to be engageable with the piston is further provided. The piston movement restricting member is disposed at a position where when the moving member is engaged with the engaging portion of the piston, the piston is in contact with the moving member and the engagement with the piston is released. When not engaged with the engaging portion, it is disposed at a position where the engagement with the piston is maintained.

  In this case, when the moving member is not engaged with the engaging portion of the piston, the piston movement restricting member is disposed at a position where the engagement with the piston is maintained. As a result, even if the piston tries to move toward the first door opening / closing state monitoring contact inside the guide member, the piston movement restricting member engages with the piston, so that the piston is brought into a predetermined position inside the guide member. As a result, it is possible to prevent the first door opening / closing state monitoring contact inside the guide member from being accidentally short-circuited by the action of the lower end of the piston when the door is not closed.

  Further, when the moving member is engaged with the engaging portion of the piston, the moving member contacts the piston movement restricting member, and the piston movement restricting member is disposed at a position where the engagement with the piston is released. ing. In this case, even if the piston tries to move toward the first door opening / closing state monitoring contact inside the guide member, the moving member is engaged with the engaging portion of the piston. Thus, it is possible to prevent the first door opening / closing state monitoring contact from being inadvertently short-circuited by the action of the lower end of the piston when the door is not closed.

  According to a fourth aspect of the present invention, in the first aspect, for detecting a second door opening / closing state for detecting and monitoring the door closed state by detecting that the moving member is engaged with the engaging portion of the piston. A contact is provided.

  In this case, since the second door opening / closing state monitoring contact detects and monitors the door closing state, in combination with the door closing state detection / monitoring by the first door opening / closing state monitoring contact, the door The safety of the open / closed state detection device can be further improved.

  According to a fifth aspect of the present invention, in the third aspect, by detecting through the piston movement restricting member that the moving member is engaged with the engaging portion of the piston, the door closing state is detected and monitored. Two door opening / closing state monitoring contacts are provided.

  In this case, when the moving member is engaged with the engaging portion of the piston, the moving member contacts the piston movement restricting member, and the piston movement restricting member is disposed at a position where the engagement with the piston is released. At this time, the second door opening / closing state monitoring contact detects the engagement of the moving member with the piston engaging portion via the piston movement restricting member. As a result, the second door opening / closing state monitoring contact detects and monitors the door closing state, and in combination with the door closing state detection / monitoring by the first door opening / closing state monitoring contact, the door opening / closing state is detected. The safety of the detection device can be further improved.

  As described above, according to the door open / closed state detection device according to the present invention, when the door is closed, the moving member is engaged with the engaging portion of the piston, and the piston is moved by the moving member via the engaging portion. By reciprocating inside, the first door opening / closing state monitoring contact is short-circuited to detect and monitor the door opening / closing state.

  In this case, the first door opening / closing state monitoring contact is provided inside the cylindrical portion of the guide member provided with the piston that can be moved up and down, and the contact is not in an exposed state, but in the outer space. It has not been exposed. For this reason, it is possible to surely prevent foreign matters such as dust and insects from adhering to the contact and rust generation on the contact, and to prevent contact failure.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
[First embodiment]
FIGS. 1 to 7 are views for explaining an elevator door lock state detection device according to a first embodiment of the present invention. FIGS. 1 to 5 show the door lock state detection device as viewed from the front side. FIG. 6 is a diagram showing the door lock operation in chronological order from the door open state, FIG. 6 is a diagram showing a state in which the return spring of the piston is damaged, and FIG. It is a figure which shows the state which carried out.

  As shown in FIGS. 1 to 5, this elevator door lock state detection device 1 is provided in a landing door (or first outer door) and has a substantially L-shape having a collar (lock claw) 20. It is fixed to the locking lever (moving member) 2 and the member (or second outer door) on the wall side of the landing, and the door is locked to the wall side (or the first and second doors) when the collar 20 is locked. And a case 3 having a locked portion 30 for locking the outer door.

The locking lever 2 is provided with a driving roller 21 and a driven roller 22. Drive roller 21 is adapted to freely rotate about the rotation center O ₁ of the shaft 21A, similarly, the driven roller 22 is rotatable around a rotational center O ₂ of the support shaft 22A. A roller 24 is rotatably provided at the tip of the locking lever 2 via a support shaft 25. As shown in FIG. 5, a support plate 4 is provided on the back side of the locking lever 2 (not shown in FIGS. 1 to 4). The support plate 4 is fixed to the outer door by mounting bolts 40. A support shaft 22 </ b> A of the roller 22 is fixed to the locking lever 2. The support shaft 21 </ b> A of the roller 21 extends through the locking lever 2 to the support plate 4, and its extended end is fixed to the support plate 4. With this configuration, the locking lever 2 is provided so as to be rotatable (turnable) around the support shaft center O ₁ of the roller 21 with respect to the support plate 4 (see a two-dot chain line in FIG. 5).

  At one end of the support plate 4, a standing wall portion 41 is formed that rises to the front side in FIG. On the other hand, at one end of the locking lever 2, a standing wall portion 23 that rises to the front side in FIG. 5 is formed at a position facing the standing wall portion 41 of the support plate 4. Screws 42 are inserted into the standing wall portions 23 and 41, and the intervals between the standing wall portions 23 and 41 are fixed by nuts 43 and 44 that are screwed into the screws 42 from the outside of the facing standing wall portions 23 and 41. It is kept. A compression spring 45 is attached around the screw 42 inside each of the opposed standing wall portions 23 and 41. The end portions of the compression spring 45 are in pressure contact with the side surfaces of the standing wall portions 23 and 41, respectively.

  Further, the elevator car door (inner door) is provided with engagement plates 10 and 11 that are arranged to face each other at a predetermined interval. The engagement plates 10 and 11 are interlocked with the opening and closing operation of the inner door. It is designed to move left and right. When the elevator is stopped on each floor, the rollers 21 and 22 of the outer door are arranged between the engagement plates 10 and 11 of the inner door regardless of the open / closed state of the door. As a result, the locking lever 2 moves in conjunction with the opening / closing operation of the inner door via the engagement state of the engagement plates 10 and 11 and the rollers 21 and 22 during the opening / closing operation of the inner door. Thus, the outer door opens and closes in conjunction with the opening and closing operation of the inner door.

  In the case 3, a guide member 5 extending substantially in the vertical direction (in this example, obliquely upward toward the locking lever) is provided. An opening 50 that allows insertion of the distal end portion of the locking lever 2 is formed through a part of the side surface of the guide member 5. A solid piston 6 is provided inside the hollow of the guide member 5 so as to be movable up and down. The piston 6 is formed with a through hole 60 in a lateral direction (that is, a direction orthogonal to the axial direction) facing the opening 50 of the guide member 5. The through hole 60 functions as an engaging portion with which the distal end portion of the locking lever 2 can be engaged. The guide member 5 has a cylindrical portion below the piston 6 in which a return spring 61 that urges the piston 6 upward is disposed.

  A contact 6 </ b> A is attached to the lower end of the piston 6. Further, a contact 5A is attached to the bottom of the cylindrical portion formed in the lower portion of the guide member 5. These contact points 5A and 6A constitute a door lock state monitoring contact for detecting and monitoring the lock state of the outer door. The door lock state monitoring contacts 5A and 6A are short-circuited by the action of the lower end of the piston when the outer door is locked, that is, when the contact 6A moves downward.

  On the side surface of the guide member 5, a protruding portion 51 having a space 51 a is integrally provided at a position facing the opening 50. In the empty space 51 a, the piston 6 is prevented from dropping at a predetermined position inside the guide member 5 by preventing the piston 6 from falling inside the guide member 5 when the return spring 61 is damaged. A member 52 is provided.

  The upper end of the piston drop prevention member 52 is connected to the upper end of the space 51 a via a pin 53, and is rotatable around the center of the pin 53. The piston drop prevention member 52 extends downward, and its lower end 52a is formed in a bowl shape. On the other hand, an engaging recess 62 is formed on the side surface of the lower portion of the piston 6. In a state where the distal end portion of the locking lever 2 is not engaged with the through hole 60 of the piston 6, for example, in a door open state as shown in FIG. 1, the lower end 52 a of the piston drop prevention member 52 is the engagement recess of the piston 6. At this time, the lower end 52a is located at a position where the engagement with the piston 6 is maintained. A biasing spring 54 that biases the piston drop prevention member 52 toward the piston 6 is provided in the space 51 a of the overhang portion 51.

Next, the operation of the door lock state detection apparatus 1 configured as described above will be described.
First, in the open state of the inner door and the outer door, as shown in FIG. 1, the locking lever 2 is disposed at a position away from the case 3 on the wall side. In the figure, the direction of arrow a is the closing direction of each door, and the direction of arrow b is the opening direction of each door. In the case where the door is open, the piston 6 is disposed at an upper position inside the guide member 5 by the spring force of the return spring 61 in the case 3. For this reason, the contact 6A is separated from the contact 5A, and the door lock state monitoring contacts 5A and 6A are in an OFF state. At this time, the engaging plate 10 that moves in conjunction with the inner door is in contact with the front end (the left end in FIG. 1) of the driven roller 22 of the locking lever 2, thereby causing the compression spring 45 (FIG. 5). The elastic repulsive force restricts the locking lever 2 from rotating around the support shaft center O ₁ of the drive roller 21 in the counterclockwise direction in the drawing. The engagement plate 11 is in contact with the rear end (right end in the figure) of the drive roller 21.

  From this state, when the close button of the inner door is pressed, the inner door starts moving in the direction of arrow a. Then, the engagement plates 10 and 11 interlocked with the inner door also move in the direction of arrow a. Thereby, as shown in FIG. 2, the roller 24 at the distal end of the locking lever 2 is inserted into the through hole 60 of the piston 6 through the opening 50 of the guide member 5 and engaged therewith. At this time, the roller 24 is in contact with the piston fall prevention member 52 and rotates the piston fall prevention member 52 around the pin 53 against the spring force of the biasing spring 54 in the clockwise direction in the figure. The lower end 52a of the piston drop prevention member 52 is arranged at a position outside the engagement recess 62 of the piston 6, that is, a position where the engagement possible state with the piston 6 is released. Note that the position of the locking lever 2 shown in FIG. 2 is such a position that the inner door and the outer door can be opened again even if the inner door open button is pressed (that is, the door openable position). .

Next, in the state shown in FIG. 3, the engagement plate 10 has moved a little toward the case 3, whereby the locking lever 2 is supported by the roller 21 by the action of the elastic repulsive force of the compression spring 45 (FIG. 5). The shaft 20 is slightly rotated counterclockwise around the shaft center O ₁ to a position immediately before the locking portion 20 of the locking lever 2 is locked to the locked portion 30 of the case 3 (that is, the locking start position). Has moved. At this time, the inner door and the outer door are completely closed. At this time, the tip of the locking lever 2 is moved downward, so that the piston 6 is slightly moved downward in the guide member 5 through the through hole 60.

Next, in the state shown in FIG. 4, the engagement plate 10 is further moved to the case 3 side, whereby the locking lever 2 is further rotated around the support shaft center O ₁ of the roller 21 counterclockwise in the figure. Then, the flange portion 20 of the locking lever 2 is locked to the locked portion 30 of the case 3. At this time, the tip of the locking lever 2 moves downward, so that the piston 6 moves further down in the guide member 5 through the through-hole 60, and the contact 6A at the lower end of the piston is at the bottom of the guide member 5. Contacting the contact 5A, the door lock state monitoring contacts 5A and 6A are turned on.

When the engagement plate 10 further moves to the case 3 side from this state, as shown in FIG. 5, the locking lever 2 further rotates around the support shaft center O ₁ of the roller 21 counterclockwise as shown in the drawing, The lever portion 20 of the lever 2 is disposed at a position where the lever portion 20 is completely locked to the locked portion 30 of the case 3 (that is, the locking completion position). At this time, the distal end portion of the locking lever 2 moves further downward, so that the piston 6 moves further downward in the guide member 5 and the piston 6 is completely pushed to the bottom of the guide member 5 (that is, Pushed).

  Thereby, the elevator can be raised and lowered, and the elevator starts to move up and down toward the designated floor.

  In this case, the door lock state monitoring contacts 5A and 6A are provided inside the cylindrical portion of the guide member 5 provided with the piston 6 that can be moved up and down. Therefore, the contacts 5A and 6A are exposed. It is not in a state and is not exposed to the outer space. As a result, it is possible to reliably prevent foreign matter such as dust and insects from adhering to the contacts 5A and 6A, and rust to be generated from the contacts 5A and 6A. As a result, it is possible to reliably prevent contact failure.

  Next, FIG. 6 shows a state where the return spring 61 of the piston 6 is damaged when the distal end portion of the locking lever 2 is not inserted into the through hole 60 of the piston 6. Alternatively, FIG. 6 shows a state in which the distal end portion of the locking lever 2 is retracted from the through hole 60 of the piston 6 with the return spring 61 of the piston 6 damaged.

  When the distal end portion of the locking lever 2 is not inserted into the through hole 60 of the piston 6, the bowl-shaped lower end 52 a of the piston drop prevention member 52 is disposed in the engagement recess 62 of the piston 6 as shown in FIG. 1. It is placed in a position to maintain the engagement with the piston 6. If the return spring 61 is damaged from this state and the piston 6 attempts to fall down inside the guide member 5, the lower end 52 a of the piston drop prevention member 52 is engaged with the upper end of the engagement recess 62 of the piston 6. (Refer FIG. 6) Thereby, the fall of piston 6 can be prevented.

  Further, when the distal end portion of the locking lever 2 tries to retreat from the through hole 60 of the piston 6 in a state where the return spring 61 of the piston 6 is damaged, the piston fall prevention member 52 pressed by the distal end portion of the locking lever 2 is The lower end 52a of the biasing spring 54 is gradually rotated by the spring force of the biasing spring 54, and the lower end 52a is disposed in the engagement recess 62 of the piston 6. For this reason, when the piston 6 tries to fall down inside the guide member 5 with the distal end portion of the locking lever 2 completely detached from the through hole 60 of the piston 6, the lower end 52a of the piston drop preventing member 52 is moved to the piston. 6 is engaged with the upper end of the engaging recess 62 (see FIG. 6), and the piston 6 can be prevented from falling.

  At this time, the piston 6 is held at a predetermined position in the vertical direction inside the guide member 5, and the contact 6A at the lower end of the piston is disposed at a position away from the contact 5A at the bottom of the guide member, and the door lock state monitoring contact 5A. , 6A remains off. In this way, it is possible to prevent the door lock state monitoring contacts 5A and 6A inside the guide member from being inadvertently short-circuited by the action of the lower end of the piston when the door is not locked.

  In addition, as shown in FIG. 2, when the front-end | tip part of the locking lever 2 is inserted in the through-hole 60 of the piston 6, even if the return spring 61 breaks from this state, the fall of the piston 6 It is prevented by a locking lever tip that engages with the through hole 60. Thereby, similarly to the case of FIG. 6, it is possible to prevent the door lock state monitoring contacts 5A and 6A inside the guide member from being inadvertently short-circuited by the action of the lower end of the piston when the door is not locked.

  Next, FIG. 7 shows a state in which the biasing spring 54 of the piston drop prevention member 52 is damaged when the distal end portion of the locking lever 2 is not inserted into the through hole 60 of the piston 6. Alternatively, FIG. 7 shows a state in which the distal end portion of the locking lever 2 is retracted from the through hole 60 of the piston 6 in a state where the urging spring 54 of the piston drop prevention member 52 is damaged.

  When the distal end portion of the locking lever 2 is not inserted into the through hole 60 of the piston 6, the bowl-shaped lower end 52 a of the piston drop prevention member 52 is disposed in the engagement recess 62 of the piston 6 as shown in FIG. 1. It is placed in a position to maintain the engagement with the piston 6. When the urging spring 54 is broken from this state, the piston drop prevention member 52 is arranged in a direction along the vertically lower side by its own weight (see FIG. 7). Therefore, from this state, even if the return spring 61 is damaged and the piston 6 tries to fall down inside the guide member 5, the lower end 52 a of the piston drop prevention member 52 is moved to the upper end of the engagement recess 62 of the piston 6. The piston 6 can be prevented from falling.

  Further, if the tip end of the locking lever 2 tries to retreat from the through hole 60 of the piston 6 in a state where the biasing spring 54 of the piston drop preventing member 52 is damaged, the piston drop pressed by the tip end of the locking lever 2 will occur. The prevention member 52 is gradually rotated by its own weight and arranged in a direction along the vertically lower side (see FIG. 7), and the lower end 52a thereof is arranged in the engagement recess 62 of the piston 6. For this reason, even if the return spring 61 is damaged in a state where the distal end portion of the locking lever 2 is completely detached from the through hole 60 of the piston 6, Since the lower end 52a of the piston drop prevention member 52 is engaged with the upper end of the engagement recess 62 of the piston 6, the piston 6 can be prevented from dropping.

  Thereby, similarly to the case of FIG. 6, the door lock state monitoring contacts 5A and 6A can be maintained in the OFF state.

[Second Embodiment]
FIGS. 8 to 15 are views for explaining an elevator door lock state detection device according to a second embodiment of the present invention. FIGS. 8 to 12 show the door lock state detection device as viewed from the front side. FIG. 13 is a diagram showing the door lock operation in chronological order from the door open state, FIG. 13 is a diagram showing a state where the return spring of the piston is damaged, and FIG. 14 is a diagram showing a case where the biasing spring of the piston fall prevention member is broken FIG. 15 is a diagram showing a state where the door lock state monitoring contact is welded. In these drawings, the same reference numerals as those in the first embodiment denote the same or corresponding parts. 8 to 15 do not show a support plate for rotatably supporting the locking lever, but the second embodiment also has a support plate similar to the first embodiment. ing.

  In the door lock state detection device 1 ′ according to the second embodiment, the door closed state is detected and monitored by detecting that the tip of the locking lever 2 is inserted into the through hole 60 of the piston 6. The point that the door closed state monitoring contact is provided is greatly different from that of the first embodiment. This door closed state monitoring contact is disposed on the back side (left side of each figure) of the piston drop prevention member 52.

  In the overhang portion 51, a hole 51b penetrating the overhang portion 51 is formed at a position where the urging spring 54 in the first embodiment is disposed. The arrangement direction of the hole 51b is a direction substantially orthogonal to the arrangement direction of the piston 6. A shaft 55 is slidably provided in the hole 51b. A contact 55 </ b> A is attached to the shaft 55. The shaft 55 is urged toward the piston drop preventing member 52 by the spring force of the urging spring 54 ′, and the tip thereof is in contact with the piston drop preventing member 52. Further, in the overhang portion 51, a contact point 51A is attached at a position facing the contact point 55A of the shaft 55.

  These contact points 51A and 55A constitute a door closed state monitoring contact for detecting and monitoring the closed state of the outer door. The door closing state monitoring contacts 51A and 55A are configured such that when the outer door is closed, the tip of the locking lever 2 comes into contact with the piston drop prevention member 52 and the shaft 55 is slid through the piston drop prevention member 52. It is designed to short-circuit.

Next, the operation of the door lock state detection device 1 ′ configured as described above will be described.
First, in the open state of the inner door and the outer door, as shown in FIG. 8, the locking lever 2 is disposed at a position away from the case 3 on the wall side. In the door open state, the door lock state monitoring contacts 5A and 6A are in an off state.

  From this state, when the close button of the inner door is pressed, the inner door starts moving in the direction of arrow a, and the engagement plates 10 and 11 interlocking with the inner door also move in the direction of arrow a. As a result, as shown in FIG. 9, the roller 24 at the tip of the locking lever 2 is inserted into the through hole 60 of the piston 6 through the opening 50 of the guide member 5 and engaged therewith. At this time, the roller 24 is in contact with the piston fall prevention member 52 and rotates the piston fall prevention member 52 around the pin 53 against the spring force of the urging spring 54 'in the clockwise direction in the drawing. The lower end 52a of the fall prevention member 52 is disposed at a position outside the engagement recess 62 of the piston 6, that is, a position where the engagement with the piston 6 is released. Note that the position of the locking lever 2 shown in FIG. 9 is such a position that the inner door and the outer door can be opened again even if the opening button of the inner door is pressed (that is, the door openable position). .

  At this time, the shaft 55 is pushed in by the rotation of the piston drop prevention member 52, so that the contact point 55A comes into contact with the contact point 51A, and the door closed state monitoring contacts 51A and 55A are turned on. Yes.

Next, in the state shown in FIG. 10, the engagement plate 10 has moved a little to the case 3 side, so that the locking lever 2 slightly moves counterclockwise around the spindle center O ₁ of the roller 21. By rotating, the collar portion 20 of the locking lever 2 is moved to the position immediately before being locked to the locked portion 30 of the case 3 (that is, the locking start position). At this time, the inner door and the outer door are completely closed. At this time, the tip of the locking lever 2 is moved downward, so that the piston 6 is slightly moved downward in the guide member 5 through the through hole 60.

Next, in the state shown in FIG. 11, the engagement plate 10 is further moved to the case 3 side, so that the locking lever 2 further rotates around the support shaft center O ₁ of the roller 21 counterclockwise in the figure. Then, the flange portion 20 of the locking lever 2 is locked to the locked portion 30 of the case 3. At this time, the tip of the locking lever 2 moves downward, so that the piston 6 moves further down in the guide member 5 through the through-hole 60, and the contact 6A at the lower end of the piston is at the bottom of the guide member 5. Contacting the contact 5A, the door lock state monitoring contacts 5A and 6A are turned on.

When the engagement plate 10 further moves to the case 3 side from this state, as shown in FIG. 12, the locking lever 2 further rotates around the spindle center O ₁ of the roller 21 in the counterclockwise direction in the drawing, The lever portion 20 of the lever 2 is disposed at a position where the lever portion 20 is completely locked to the locked portion 30 of the case 3 (that is, the locking completion position). At this time, the distal end portion of the locking lever 2 moves further downward, so that the piston 6 moves further downward in the guide member 5 so that the piston 6 is completely pushed to the bottom of the guide member 5. Become. Note that, from the state of FIG. 9 to the state of FIG. 12, the door-closed state monitoring contacts 51A and 55A are kept on.

  Thus, the elevator can be lifted and lowered only when both the door closed state monitoring contacts 51A and 55A are on and the door lock state monitoring contacts 5A and 6A are on, and the elevator is designated. Start ascending and descending to the floor.

  In this case, the door lock state monitoring contacts 5A and 6A are provided inside the cylindrical portion of the guide member 5 provided with the piston 6 that can be moved up and down. Therefore, the contacts 5A and 6A are exposed. It is not in a state and is not exposed to the outer space. As a result, it is possible to reliably prevent foreign matter such as dust and insects from adhering to the contacts 5A and 6A, and rust to be generated from the contacts 5A and 6A. As a result, it is possible to reliably prevent contact failure.

  In addition, in this case, when the distal end portion of the locking lever 2 is inserted into the through hole 60 of the piston 6, the distal end portion of the locking lever 2 abuts against the piston drop prevention member 52, and the piston fall prevention member 52 is moved to the piston. 6 is disposed at a position where the engagement with the engagement recess 62 is released. At this time, the shaft 55 that contacts the piston drop prevention member 52 is pushed in, and the door closing state monitoring contacts 51A and 55A are turned on. become. As a result, the door closing state monitoring contacts 51A and 55A detect and monitor the insertion of the locking lever tip into the piston through hole 60 via the piston drop prevention member 52, so the door lock state monitoring contacts 5A and 6A are monitored. Combined with the detection / monitoring of the door lock state, the safety of the door lock state detection device 1 ′ can be further improved.

  Next, FIG. 13 shows a state where the return spring 61 of the piston 6 is damaged and the contacts 51A and 55A are welded when the distal end portion of the locking lever 2 is not inserted into the through hole 60 of the piston 6. . Alternatively, FIG. 13 shows a state in which the distal end portion of the locking lever 2 is retracted from the through hole 60 of the piston 6 in a state where the return spring 61 of the piston 6 is damaged and the contacts 51A and 55A are welded.

  When the distal end portion of the locking lever 2 is not inserted into the through hole 60 of the piston 6, the bowl-shaped lower end 52 a of the piston drop prevention member 52 is disposed in the engagement recess 62 of the piston 6 as shown in FIG. 8. It is placed in a position to maintain the engagement with the piston 6. From this state, when the contacts 51A and 55A are welded and the return spring 61 is damaged, the piston drop prevention member 52 is arranged in the direction along the vertically downward direction by its own weight (see FIG. 13). For this reason, from this state, even if the piston 6 tries to fall down inside the guide member 5, the lower end 52 a of the piston drop prevention member 52 is engaged with the upper end of the engagement recess 62 of the piston 6. 6 can be prevented from falling.

  Further, when the return spring 61 of the piston 6 is damaged and the contact points 51A and 55A are welded, if the distal end portion of the locking lever 2 tries to retreat from the through hole 60 of the piston 6, it is pressed by the distal end portion of the locking lever 2. The piston drop prevention member 52 that has been rotated gradually by its own weight, and its lower end 52 a is disposed in the engagement recess 62 of the piston 6. For this reason, even if the return spring 61 is damaged in a state where the distal end portion of the locking lever 2 is completely detached from the through hole 60 of the piston 6, The lower end 52a of the piston drop prevention member 52 engages with the upper end of the engagement recess 62 of the piston 6 (see FIG. 13), thereby preventing the piston 6 from falling.

  At this time, the piston 6 is held at a predetermined position in the vertical direction inside the guide member 5, and the contact 6A at the lower end of the piston is disposed at a position away from the contact 5A at the bottom of the guide member, and the door lock state monitoring contact 5A. , 6A remains off. In this way, it is possible to prevent the door lock state monitoring contacts 5A and 6A inside the guide member from being inadvertently short-circuited by the action of the lower end of the piston when the door is not locked.

  In the example shown in FIG. 13, the door closed state monitoring contacts 51A and 55A are welded, but in this case, the door lock state monitoring contacts 5A and 6A are off as described above. Therefore, the elevator does not start to move up and down, and safety is ensured.

  Next, FIG. 14 shows a state in which the urging spring 54 ′ of the piston drop prevention member 52 is damaged when the distal end portion of the locking lever 2 is not inserted into the through hole 60 of the piston 6. Alternatively, FIG. 14 shows a state in which the distal end portion of the locking lever 2 is retracted from the through hole 60 of the piston 6 in a state where the urging spring 54 ′ of the piston drop preventing member 52 is damaged.

  When the distal end of the locking lever 2 is not inserted into the through hole 60 of the piston 6, the bowl-shaped lower end 52 a of the piston drop prevention member 52 is disposed in the engagement recess 62 of the piston 6 as shown in FIG. 8. It is placed in a position to maintain the engagement with the piston 6. If the urging spring 54 ′ is damaged from this state, the piston drop prevention member 52 is disposed in a direction along the vertically lower side by its own weight (see FIG. 14). Therefore, from this state, even if the return spring 61 is damaged and the piston 6 tries to fall down inside the guide member 5, the lower end 52 a of the piston drop prevention member 52 is moved to the upper end of the engagement recess 62 of the piston 6. The piston 6 can be prevented from falling.

  Further, if the tip end of the locking lever 2 tries to retreat from the through hole 60 of the piston 6 in a state where the biasing spring 54 of the piston drop preventing member 52 is damaged, the piston drop pressed by the tip end of the locking lever 2 will occur. The prevention member 52 is gradually rotated by its own weight and arranged in a direction along the vertically downward direction (see FIG. 14), and its lower end 52a is arranged in the engagement recess 62 of the piston 6. For this reason, even if the return spring 61 is damaged in a state where the distal end portion of the locking lever 2 is completely detached from the through hole 60 of the piston 6, Since the lower end 52a of the piston drop prevention member 52 is engaged with the upper end of the engagement recess 62 of the piston 6, the piston 6 can be prevented from dropping.

  Thereby, similarly to the case of FIG. 13, the door lock state monitoring contacts 5A and 6A can be maintained in the OFF state.

  Next, FIG. 15 shows a state in which the door lock state monitoring contacts 5A and 6A are welded.

  In this case, the contact 6A is forcibly separated from the contact 5A by using the force that the piston 6 is lifted upward by the rotation of the locking lever 2 engaged with the through hole 60 of the piston 6. Is possible. At this time, even if the piston portion (two-dot chain line portion in FIG. 15) forming the through hole 60 of the piston 6 is damaged, contact adjustment is performed so that the door closed state monitoring contacts 51A and 55A are turned off. In this case, the elevator does not start moving up and down, and safety is ensured.

[Other Example 1]
In the first and second embodiments, an example is shown in which the locking lever 2 is configured to rotate in a vertical plane, but the application of the present invention is not limited to this. The locking lever 2 may be configured to rotate in a horizontal plane, or in a vertical plane or a plane that forms an angle with respect to the horizontal plane. Therefore, the reciprocating direction of the piston 6 with which the locking lever 2 is engaged is not limited to the vertical direction, and may be the horizontal direction, or may be the vertical direction or an oblique direction that forms an angle with respect to the horizontal direction.

[Other Example 2]
In the first and second embodiments, the door closed state is detected by the contacts 51A and 55A, and the door locked state is detected by the contacts 5A and 6A. Application is not limited to this. In the present invention, the contacts 5A and 6A are used as the first door opening / closing state monitoring contacts, and the contacts 51A and 55A are used as the second door opening / closing state monitoring contacts. Similarly, the present invention can be applied to a door open / closed state detection device that detects that the door is completely closed.

[Other Example 3]
In the first and second embodiments, the contact 6A is provided on one end surface (bottom surface) of the piston 6. However, in the present invention, the contacts 5A and 6A are provided on one end surface side of the piston 6. What is necessary is just to short-circuit by an effect | action, for example, while providing the contact 6A in the surrounding surface at the end surface side of piston 6, you may make it provide the contact 5A in the inner surface of the cylindrical part of the guide member 5.

[Other application examples]
In each of the above-described embodiments, an example in which the door lock device according to the present invention is applied to an elevator door is shown. However, the present invention is not limited to this, and a protective door for FA (factory automation), an amusement park, etc. It can also be applied to doors for play facilities.

  In these cases, the system may be configured to turn on the power of machines such as robots and game machines inside the door only after both the door lock state monitoring contact and the door closed state monitoring contact are turned on. By configuring the system to turn off the power of machines such as robots and game machines inside the door when either the door lock state monitor contact or the door closed state monitor contact turns off, Safety can be improved.

It is a front view of the door locked state detection apparatus by 1st Example of this invention, Comprising: The door open state is shown. The door openable position during the door closing operation of the door lock state detection device (FIG. 1) is shown. The door closing position / locking start position in the door closing operation of the door lock state detection device (FIG. 1) is shown. The on position of the door lock state monitoring contact after the door closing operation of the door lock state detection device (FIG. 1) is shown. The lock completion position of the door lock state detection device (FIG. 1) is shown. In the door lock state detection device (FIG. 1), the piston fall prevention member is in operation in a state where the return spring of the piston is damaged. In the door lock state detection device (FIG. 1), the urging spring of the piston drop prevention member is shown broken. It is a front view of the door locked state detection apparatus by 2nd Example of this invention, Comprising: The door open state is shown. The door openable position during the door closing operation of the door lock state detection device (FIG. 8) is shown. The door closed position / locking start position in the door closing operation of the door lock state detection device (FIG. 8) is shown. The on-position of the door lock state monitoring contact after the door closing operation of the door lock state detection device (FIG. 8) is shown. The lock completion position of the door lock state detection device (FIG. 8) is shown. In the door lock state detection device (FIG. 8), the piston fall prevention member is operating in a state where the return spring of the piston is damaged. In the door lock state detection device (FIG. 8), the biasing spring of the piston drop prevention member is shown broken. In the door lock state detection device (FIG. 8), the door lock state monitoring contact is welded.

Explanation of symbols

1, 1 ': Door lock state detection device

2: Locking lever (moving member)
20: Buttocks (lock claw)

3: Case 30: Locked part

5: Guide member 5A: (door lock state monitor) contact 51A: (door closed state monitor) contact 52: Piston fall prevention member 55A: (door closed state monitor) contact

6: Piston 6A: (For door lock state monitoring) Contact 60: Through hole (engagement part)

Claims (5)

A door open / closed state detection device for detecting the open / closed state of a door,
A moving member provided on the first door side and moving in conjunction with the opening and closing operation of the first door;
Provided on the side of the second door that opens and closes together with the first door, or provided on a wall-side member, and has an engaging portion with which the moving member can be engaged, and the movement through the engaging portion. A reciprocating piston driven by a member;
A guide member that slidably supports one end face of the piston, and that guides the movement of the piston;
A first door opening / closing state for detecting and monitoring a door opening / closing state provided so as to be short-circuited by the action of the one end face side of the piston when the door is closed inside the cylindrical portion of the guide member Monitoring contacts;
A door open / closed state detection device. In claim 1,
The moving member has a lock claw for locking the first door to the second door or the wall-side member,
The member on the second door or wall side has a locked portion to be locked by the lock claw,
The first door opening / closing state monitoring contact detects and monitors the door lock state when the first door is locked,
A door open / closed state detecting device. In claim 1,
The piston is engaged with the piston so as to restrict the piston from moving toward the first door opening / closing state monitoring contact inside the guide member and hold the piston at a predetermined position inside the guide member. A piston movement restricting member provided so as to be compatible,
The piston movement restricting member is
When the moving member is engaged with the engaging portion of the piston, the moving member is disposed at a position where the moving member comes into contact with the moving member and the engagement with the piston is released. When not engaged with the engagement portion, the piston is disposed at a position where the engagement with the piston is maintained.
A door open / closed state detecting device. In claim 1,
A second door opening / closing state monitoring contact for detecting and monitoring a door closed state by detecting that the moving member is engaged with the engaging portion of the piston is provided.
A door open / closed state detecting device. In claim 3,
A second door opening / closing state monitoring contact for detecting and monitoring a door closed state by detecting through the piston movement restricting member that the moving member is engaged with the engaging portion of the piston. Is provided,
A door open / closed state detecting device.

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