JP2009067492A - Elevator car holding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain an elevator car holding device capable of promptly stopping lifting caused by the self-traveling of a car during the maintenance work of an elevator. <P>SOLUTION: The elevator car holding device is provided with a base 17 having an inclined wall face 17a forming a wedge space 19 between the inclined wall face 17a and a car guide rail 7a; a movable iron plate 35 arranged so as to be engaged with the first support face 27c of a first guide member 27 and the second support face 30c of a second guide member 30; a first coil spring 40; an electromagnet 41; a holding member 46 fixed to rotating members 45a, 45b; suspending members 34a, 34b for making the holding member 46 contact with and separate from the car guide rail 7a when the movable iron plate 35 is held in a maintenance operation mode position and a car lifting/lowering permitting position; and a maintenance operation control board 60 for supplying an electric current to the electromagnet 41. When the movable iron plate 35 is in the maintenance operation mode position and the car 4 is lifted, the holding member 46 bites into a space between the car guide rail 7a and the inclined wall face 17a. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an elevator car holding device for quickly stopping a lift due to self-propelled car movement during elevator maintenance work.

A conventional elevator car holding device is formed between a top stopper installed at a position above the car facing the main guide rail when a maintenance worker performs maintenance work on the car, and between the top stopper and the main guide rail. A car lock key that is set from above in the gap to be formed, and an operating arm that is fixed to the upper end of the main guide rail so as to face the upper part of the car lock key (see, for example, Patent Document 1). .
At this time, a tapered gap is formed between the top stopper and the main guide rail so as to increase in width upward, and a wedge-shaped car lock key opens the gap from the main guide rail to the tapered gap. Is set.

  Here, when the maintenance staff stops the car at a predetermined position in the hoistway and performs maintenance work on the car, the brake for stopping the car at the predetermined position in the hoistway breaks down. The car will run towards the top of the hoistway. When the car lock key reaches the position of the operating arm, the top of the car lock key comes into contact with the operating arm and bites between the top stopper and the main guide rail. As a result, the lift due to the self-running of the car is stopped, and at this time, a top safety space is maintained between the upper surface of the car and the top of the hoistway. That is, a place on the car of the maintenance staff who was performing maintenance work on the car was secured.

JP 2005-343579 A

  However, in the conventional elevator car holding device, it is not possible to stop the lift of the car due to self-running until the top of the car lock key comes into contact with the operating arm. Therefore, there has been a problem that immeasurable tension is given to the maintenance staff on the car until the ascending due to the self-running of the car stops.

  The present invention has been made to solve the above-described problem, and an object thereof is to provide an elevator car holding device capable of quickly stopping a lift due to self-propelling of a car during elevator maintenance work. .

  The elevator car holding device according to the present invention is detachably disposed on the upper part of the car, and has a base having an inclined wall surface that forms a wedge-like space that gradually narrows downward from above with the car guide rail, A horizontal first support surface disposed downward at a first distance from the wedge-shaped space in a direction away from the car guide rail and at a first height upward from the base. A first guide member having a position close to the second distance from the first support surface toward the wedge-shaped space, and a position at a second height lower than the first height position above the base; A second guide member having a horizontal second support surface arranged downward, one end positioned on the wedge-shaped space, and the other end engageable with the first support surface and the second support surface And the other end side of the movable member on the first support surface and the second A first elastic member that is disposed so as to be urged in the direction of contact with the holding surface, and that holds the movable member in a holding operation mode position where the other end of the movable member contacts the first support surface and the second support surface; Electromagnetic force for rotating the movable member so that the other end side of the movable member is separated downward from the first support surface with the second support surface as a fulcrum against the biasing force of the member and the first elastic member An electromagnet that holds the movable member at a car lifting permission position where the other end side of the movable member abuts on the second support surface and is separated from the first support surface, and one end of the movable member about the axis around one end of the movable member A rotating member that is pivotably attached to the other end, is disposed in the wedge-shaped space, and the other end moves between the car guide rail and the inclined wall surface in conjunction with the pivoting movement around the axis, Between the holding member attached to the other end of the member, the rotating member and the movable member. When the movable member is held at the maintenance work mode position, the second elastic member that biases the rotating member in the direction in which the holding member abuts the car guide rail is held by the biasing force of the second elastic member. When the member is brought into contact with the car guide rail and the movable member is held at the car raising / lowering permission position, the holding member is turned away from the car guide rail against the urging force of the second elastic member. A floating member that rotates the member around its axis, and a maintenance operation control panel that energizes the electromagnet to generate electromagnetic force and holds the movable member in the car lifting / lowering permission position, and the movable member is in the maintenance work mode position. When the car rises while being held by the second elastic member, the movable member resists the urging force of the first elastic member by the frictional force between the holding member abutted by the urging force of the second elastic member and the car guide rail. The first support surface And the support member is configured to bite between the car guide rail and the inclined wall surface to stop the raising of the car.

  According to the present invention, even if the car rises by self-propelled during maintenance work by maintenance personnel, the holding member is bitten between the car guide rail and the inclined wall surface of the base only by moving the car by a minute distance. It is possible to swiftly stop the climb due to the self-running of the car.

The best mode for carrying out the present invention will be described below with reference to the drawings.
FIG. 1 is a schematic view of an elevator provided with a car holding device according to the present invention, and FIG. 2 is a cross-sectional view taken along the line II-II in FIG. . 3 is an enlarged cross-sectional view of part A of FIG. 2, FIG. 4 is a front view seen from the direction B of FIG. 3, FIG. 5 is a cross-sectional view taken along the line V-V of FIG. FIG. 7 is a cross-sectional view of the car holding device according to the present invention, and shows the time when the movable iron plate is in the car holding position. FIG. 8 is a cross-sectional view of the car holding device according to the present invention, and shows the time when the movable iron plate is in the car lifting / lowering permission position.

  In FIG. 1, an elevator 1 is of a machine room-less type, and includes a car 4, a drive sheave 6, and an electric motor (not shown) disposed in a hoistway 3 surrounded by the hoistway wall 2. And a pair of car guide rails 7a and 7b, a main rope 8, a counterweight 9, an elevator control panel 10, and the like.

The hoisting machine 5 is disposed in the pit 3 a of the hoistway 3. The drive sheave 6 rotates about the axis in conjunction with the rotation of the electric motor.
Further, one end of the main rope 8 is fixed to the ceiling of the hoistway 3 and is suspended from the ceiling. The main rope 8 is looped over a pair of turning pulleys 11a and 11b provided at the lower portion of the car 4 and reversed. Further, the main rope 8 is looped over the pulley 12a installed on the ceiling of the hoistway 3 and reversed again, wound around the driving sheave 6 and reversed again, and further installed on the ceiling of the hoistway 3 The pulley 12b is hung around the pulley 12b and reversed again, and is hung around the pulley 12c fixed to the counterweight 9 and reversed again. The other end of the main rope 8 is fixed to the ceiling of the hoistway 3.

  Each of the pair of car guide rails 7a and 7b has the longitudinal direction aligned with the vertical direction, and is spaced from each of the side wall surfaces 4a and 4b of the car 4 by a predetermined distance from the floor of the pit 3a to the ceiling of the hoistway 3. It extends to the vicinity. In addition, let the direction perpendicular | vertical to side wall surface 4a, 4b be a width direction, and let a perpendicular | vertical and horizontal direction be the depth direction. That is, the length direction of the upper edge of the side wall surfaces 4a and 4b of the car 4 coincides with the depth direction.

  The elevator control panel 10 is fixed to the hoistway wall 2. The elevator control panel 10 includes a ROM (not shown) in which a program for controlling the operation of the elevator 1 is written, a CPU (not shown) for controlling the operation of the elevator 1 according to the contents of the program, and the like. The elevator 1 is controlled based on the program. The elevator control panel 10 can arbitrarily control the rotation of the drive sheave 6 via the electric motor. Since a frictional force acts between the driving sheave 6 and the main rope 8, the main rope 8 is moved according to the rotation of the driving sheave 6. Thereby, the car 4 and the counterweight 9 are moved up and down in the hoistway 3. Moreover, although not shown in figure, the brake is arrange | positioned so that rotation of the drive sheave 6 can be stopped. And the elevator control board 10 can control the raising / lowering movement of the cage | basket | car 4 and its stop arbitrarily.

Further, the main part of the car holding device 15 is disposed on the upper outer wall surface of the car 4.
Further, the car holding device 15 includes a main body 16 and a maintenance operation control panel 60 as shown in FIG. The main body 16 is arranged on the upper outer wall surface of the car 4 so as to match the position of one car guide rail 7a. Further, the car guide rail 7a is formed in a T-shaped section as shown in FIGS. 4 and 5, and the protruding end from the top of the T-shaped section is directed toward the side wall surface 4a as shown in FIG. Has been placed. Hereinafter, the car guide rail 7a means a portion protruding from the top having a T-shaped cross section.

Next, details of the main body 16 will be described.
2 to 5, the main body 16 includes a base 17, a case main body 20, a support guide body 25, a movable iron plate 35 as a movable member, a coil spring 40, electromagnet 41, rotating members 45 a and 45 b, and a holding member 46. , Plate springs 47a and 47b as second elastic members, and car lifting / lowering permission means 48 are provided.

  The base 17 is formed in a rectangular parallelepiped shape, and is formed so that the concave portion 18 opens on one surface of the rectangular parallelepiped and connects two parallel sides among the four sides forming the one surface. And the base 17 makes the groove | channel direction of the recessed part 18 correspond to a perpendicular direction (length direction of the car guide rail 7a), and the car guide rail 7a is made into the both-sides wall surface 17a, 17b and the bottom face 17c which form the recessed part 18. It is detachably fixed to the upper outer wall surface of the car 4 so as to surround it.

  At this time, as shown in FIGS. 2 and 3, the one side wall surface 17a of the recess 18 is formed such that the distance from the car guide rail 7a gradually decreases from the upper side to the lower side of the car guide rail 7a. It is inclined. That is, the wedge-shaped space 19 is formed between the car guide rail 7a and the side wall surface 17a so that the interval gradually decreases from the upper side to the lower side of the car guide rail 7a. Here, one side wall surface 17a is defined as an inclined wall surface. Further, the gap between the other side wall surface 17b and the car guide rail 7a is uniform.

The case body 20 has a bottom side 20c and side sides 20a and 20b that protrude perpendicularly from both ends of the bottom side 20c, and a cross section perpendicular to the longitudinal direction is formed in a U-shape. Furthermore, the fixed sides 20d and 20e are formed by vertically bending the tips of the side sides 20a and 20b in opposite directions.
The case body 20 is fixed with the U-shaped opening facing the upper surface of the base 17 and the fixed sides 20 d and 20 e aligned with the upper surface of the base 17. At this time, the longitudinal direction of the case body 20 coincides with the depth direction.

The support guide body 25 includes an upper support plate 26, a first guide member 27, a second guide member 30, and a holding member movement restriction unit 32.
The upper support plate 26 is formed in a rectangular flat plate shape, the longitudinal direction thereof is matched with the depth direction, and one surface thereof is fixed in accordance with the bottom side 20 c of the case body 20. At this time, one end side in the longitudinal direction of the upper support plate 26 is disposed above the wedge-shaped space 19.

  The first guide member 27 is formed in a rectangular flat plate shape, and is fixed to the upper support plate 26 so as to protrude perpendicularly to the longitudinal direction of the upper support plate 26 from the other end side of the upper support plate 26 in the longitudinal direction. Has been. That is, the first guide member 27 protrudes downward from the upper support plate 26 in the vertical direction. At this time, the first guide member 27 is disposed at a position away from the wedge-shaped space 19 by a first distance in a direction away from the car guide rail 7a. Also, the first fitting recess 28 that opens downward is formed by cutting out the protruding end side of the first guide member 27 to a predetermined depth. As shown in FIGS. 1st insertion part 27a, 27b is formed in both sides of this. In addition, the bottom surface of the first fitting recess 28 is horizontally disposed downward from the base 17 at the first height position to form the first support surface 27c.

  Further, the second guide member 30 is formed in a rectangular flat plate shape, and from the upper support plate 26 toward the upper surface of the base 17 at a position approaching the second distance from the first guide member 27 toward the wedge-shaped space 19 side. The upper support plate 26 is fixed so as to protrude downward in the vertical direction. Further, a second fitting recess 31 that opens downward is formed by cutting out the protruding end side of the second guide member 30 to a predetermined depth, and as shown in FIG. 4 and FIG. Second insertion portions 30a and 30b are formed on both sides. At this time, the bottom surface of the second fitting recess 31 constitutes a second support surface 30c that is horizontally disposed downward at a second height position lower than the first height position. .

  As shown in FIGS. 3 and 5, the holding member movement restriction unit 32 includes a side support plate 33 and floating members 34 a and 34 b. The side support plate 33 protrudes downward in the vertical direction from the upper support plate 26 so as to face the car guide rail 7a on one end side in the longitudinal direction of the upper support plate 26. At this time, the side support plate 33 is disposed above the wedge-shaped space 19. Further, the floating members 34a and 34b have a semicircular outer shape. Then, each of the floating members 34a and 34b has the length direction of the string aligned with the vertical direction, and protrudes perpendicularly to the opposite side of the car guide rail 7a from the vicinity of both sides on the protruding end side of the side support plate 33. Thus, the side support plate 33 is fixed above the wedge-shaped space 19.

  The movable iron plate 35 is formed in a rectangular flat plate shape. The movable iron plate 35 faces the other surface (lower surface) of the upper support plate 26 toward the extended end side of the first guide member 27, the second guide member 30, and the side support plate 33. Has been placed. At this time, one end side of the movable iron plate 35 in the longitudinal direction is disposed at a position spaced apart from the side support plate 33 on the side opposite to the car guide rail 7 a by a predetermined distance and above the wedge-shaped space 19.

  And the coil spring 40 as a 1st elastic member is the 1st supporting surface 27c and the 2nd supporting surface regarding the depth direction, ie, the separation direction of the 1st guide member 27 and the 2nd guide member 30. 30c. Each end of the coil spring 40 is fixed to the other surface of the upper support plate 26 and the upper surface of the base 17. At this time, the urging force of the coil spring 40 acts in a direction in which the other end side in the longitudinal direction of the movable iron plate 35 is lifted upward and brought into contact with the first support surface 27c and the second support surface 30c.

  Further, the longitudinal direction of the movable iron plate 35 is such that each of the pair of first insertion recesses 36a and 36b opens near the other end of each of the long sides of the movable iron plate 35, as shown in FIG. Are formed so as to coincide with each other. Further, each of the pair of second insertion recesses 37a and 37b has a predetermined distance from each of the first insertion recesses 36a and 36b to the wedge-shaped space 19 side (the car guide rail 7a side). The movable iron plate 35 is formed so that the positions in the longitudinal direction coincide with each other so as to open to each of the plates.

At this time, each of the first insertion portions 27a and 27b and each of the second insertion portions 30a and 30b are respectively connected to each of the first insertion recesses 36a and 36b and each of the second insertion recesses 37a and 37b. Each is inserted into a loose fit. Then, the movable iron plate 35 is loosely fitted in each of the first fitting recess 28 and the second fitting recess 31, and can be engaged with the first support surface 27c and the second support surface 30c. Yes.
Thereby, the horizontal shaking of the movable iron plate 35 is restricted, and the other end side of the movable iron plate 35 is guided and moved by the first insertion portions 27a and 27b and the second insertion portions 30a and 30b. To do.

The electromagnet 41 includes an iron core 42 and a relay coil 43, and is positioned between the second support surface 30 c and one end of the movable iron plate 35 with respect to the separation direction of the first guide member 27 and the second guide member 30. It is arranged like this.
The iron core 42 is disposed on the side of the car guide rail 7a of the second guide member 30 so that the axial direction coincides with the vertical direction. One end surface of the iron core 42 is fixed to the upper support plate 26. Further, the height position of the other end surface of the iron core 42 coincides with the second support surface 30 c of the second guide member 30. Further, the relay coil 43 is wound around the outer peripheral surface of the iron core 42.

Further, the rotating members 45a and 45b are formed in a rod shape, and one end of each of the rotating members 45a and 45b has a horizontal axis around one end side in the longitudinal direction of the movable iron plate 35 and each end face perpendicular to the short direction. Is pivotally attached to the. Further, the other end sides of the rotating members 45a and 45b are disposed in the wedge-shaped space 19, and the other end of each of the rotating members 45a and 45b is interlocked with the rotating operation around the shaft. And the side wall surface 17a.
And the holding member 46 is a column shape, and the thing in which the saw-shaped convex part which protrudes from the outer peripheral surface is formed in the circumferential direction is used. And the holding member 46 is arrange | positioned in the wedge-shaped space 19 so that the front-end | tip of a convex part may face each of the cage guide rail 7a and the side wall surface 17a, and the center part of the both end surfaces of the holding member 46 is the rotation member 45a. , 45b is fixed to the other end side.

  Each of the leaf springs 47a and 47b is fixed between the other surface (lower surface) of the movable iron plate 35 on the side of the car guide rail 7a and a portion on one end side of each of the rotating members 45a and 45b. At this time, the leaf springs 47a and 47b bias the other end side in the longitudinal direction of the rotating members 45a and 45b in a direction in which the holding member 46 is brought into contact with the car guide rail 7a.

As shown in FIGS. 3 and 5, the car raising / lowering permitting unit 48 includes an ascent permitting unit 50 and a descending permitting unit 55.
The raising permission means 50 includes a contact holding plate 49a, a pair of raising contacts 51a and 51b, and a contact connecting member 52a. The contact holding plate 49 a is fixed to the side support plate 33 so as to protrude above the movable iron plate 35 from the side support plate 33. The pair of ascending contacts 51a and 51b are fixed to the wall surface of the contact holding plate 49a facing the movable iron plate 35 so as to be separated from each other by a minute distance. The contact connecting member 52a is formed in a T-shaped cross section, and is fixed to the movable iron plate 35 so that the top of the T-shape faces the ascending contacts 51a and 51b below the ascending contacts 51a and 51b.

  The lowering permission means 55 includes a contact holding plate 49b, lowering contacts 56a and 56b, and a contact connecting member 52b. Then, as shown in FIG. 5, the lowering permission means 55 shifts the position in the length direction of the short side of the movable iron plate 35 with respect to the lifting permission means 50, and contacts holding plate 49 b, lowering contacts 56 a, 56 b, And the contact connection member 52b.

Next, the configuration of the maintenance operation control panel 60 and the electrical connection between the car holding device 15 and the maintenance operation control panel 60 will be described with reference to FIGS. 2 and 6.
The maintenance operation control panel 60 includes a mode switch 61, an ascending switch 70, a descending switch 71, output ports 73a to 73c, a high voltage side terminal 76 and a low voltage side terminal 77 of a power source (not shown), a first diode 75a and a first diode 75a. 2 diodes 75b.

  The mode changeover switch 61 has a movable contact 62 connected to the high voltage side terminal 76 and fixed contacts 63a and 63b. The movable contact 62 can manually switch the connection with the fixed contact 63a or the fixed contact 63b manually. The fixed contact 63a is connected to the output port 73a.

The ascent switch 70 has an ascending button 66, an input terminal 67a and an output terminal 68a, and the ascending switch 71 has a descending button 69, an input terminal 67b and an output terminal 68b.
The fixed contact 63b is connected to each of the input terminals 67a and 67b. Further, the output terminal 68a is connected to one raising contact 51a, and the output terminal 68b is connected to one descending contact 56a.

When the up button 66 is pressed, the input terminal 67a and the output terminal 68a are connected, and when the down button 69 is pressed, the input terminal 67b and the output terminal 68b are connected.
Further, the other ascending contact 51b is connected to the output port 73b, and the other descending contact 56b is connected to the output port 73c.

  The output ports 73a to 73c are connected to separate input ports (not shown) provided in the elevator control panel 10, respectively. Thereby, the CPU of the elevator control panel 10 described above can determine the state of the voltage applied to the output ports 73a to 73c.

The anode side of the first diode 75a is connected between the output terminal 68a and the ascending contact 51a, and the anode side of the second diode 75b is connected between the output terminal 68b and the descending contact 56a. .
The output terminal 68a is connected between the ascending contact 51a and the anode side of the second diode 75b is connected between the output terminal 68b and the descending contact 56a. The cathode sides of the first diode 75a and the second diode 75b are short-circuited and then connected to one end of the relay coil 43. The other end of the relay coil 43 is connected to a low voltage side terminal 77 of the power source.

  Therefore, since each of the output terminal 68a and the output terminal 68b is connected to one end of the relay coil 43 via the first diode 75a and the second diode 75b, the up switch 70 and the down switch 71 are connected. Each of these can be switched ON / OFF of energization to the relay coil 43 by using the ascending button 66 and the descending button 69, respectively.

  In the car holding device 15 configured as described above, when the relay coil 43 is not energized, the other end side in the longitudinal direction of the movable iron plate 35 is pulled upward by the biasing force of the coil spring 40. Thereby, the movable iron plate 35 rotates using the contact point with the second support surface 30c as a fulcrum until the other end in the longitudinal direction comes into contact with the first support surface 27c. Then, as shown in FIG. 3, the movable iron plate 35 abuts on the first support surface 27c and the second support surface 30c by the urging force of the coil spring 40, and moves downward toward the car guide rail 7a. It is stably held at the inclined maintenance work mode position.

  At this time, the rotating members 45a and 45b are in contact with a portion below the most protruding portion of the floating members 34a and 34b. Thereby, the rotation members 45a and 45b are rotated by the urging force of the leaf springs 47a and 47b, and are inclined so that the other end side approaches toward the car guide rail 7a. At this time, the convex part of the outer peripheral surface of the holding member 46 comes into contact with the car guide rail 7a in a pressed state. That is, the floating members 34a and 34b are rotating members so that the holding member 46 is brought into contact with the car guide rail 7a by the urging force of the leaf springs 47a and 47b when the movable iron plate 35 is held at the maintenance operation mode position. 45a and 45b are configured to rotate around the axis. The convex portion of the outer peripheral surface of the holding member 46 is separated from the side wall surface 17 a of the base 17 by a predetermined distance.

  Further, when the movable iron plate 35 is in the maintenance work mode position, the contact connecting members 52a and 52b are located at a predetermined distance from the ascending contacts 51a and 51b and the descending contacts 56a and 56b, respectively.

Further, when the car 4 is raised when the movable iron plate 35 is in the maintenance work mode position, the movable iron plate 35 is also raised, but a frictional force is generated between the convex portion of the outer peripheral surface of the holding member 46 and the car guide rail 7a. Since it is working, the holding member 46 stays in the same place without interlocking with the car 4. For this reason, one end side in the longitudinal direction of the movable iron plate 35 connected to the holding member 46 via the rotating members 45a and 45b is pulled downward.
Accordingly, the movable iron plate 35 resists the urging force of the coil spring 40 due to the frictional force between the holding member 46 and the car guide rail 7a, and the second support surface 30c is used with the first support surface 27c as a fulcrum. It turns to separate.

  At this time, as the base 17 rises together with the car 4, the side wall surface 17a also moves upward. Since the side wall surface 17a is inclined so that the distance between the side wall surface 17a and the car guide rail 7a is gradually shortened, the holding member 46 is raised by a small distance as shown in FIG. Just bite between the car guide rail 7a and the inclined wall surface 17a. Thereby, the rise by the self-running of the car 4 is quickly stopped.

  In addition, when the relay iron 43 is energized when the movable iron plate 35 is in the maintenance work mode position, the electromagnet 41 generates an electromagnetic force that urges the movable iron plate 35 to lift one end side in the longitudinal direction. That is, the electromagnet 41 separates the other end side of the movable iron plate 35 downward from the first support surface 27c with the contact point of the movable iron plate 35 and the second support surface 30c as a fulcrum against the urging force of the coil spring 40. An electromagnetic force is generated to rotate the movable iron plate 35 so as to cause it to move. Then, as shown in FIG. 8, the rotation of the movable iron plate 35 is stopped when it comes into contact with the lower end surface of the iron core 42, and the movable iron plate 35 is separated from the first support surface 27c. Is held by the attractive force of the electromagnet 41.

  Further, the contacts between the rotating members 45a and 45b and the floating members 34a and 34b are connected to the one end side in the longitudinal direction of the movable iron plate 35, and the floating members 34a and 34b are moved upward. Gradually moves toward the most protruding part. For this reason, the other end sides of the rotating members 45a and 45b rotate so as to be separated from the car guide rail 7a against the urging force of the leaf springs 47a and 47b.

  That is, the floating members 34a and 34b rotate so as to separate the holding member 46 from the car guide rail 7a against the urging force of the leaf springs 47a and 47b in a state where the movable iron plate 35 is held at the car lifting / lowering permission position. The moving members 45a and 45b are rotated around the axis. At the same time that the movable iron plate 35 is held at the car lifting / lowering permission position, the contact connection members 52a and 52b that are raised in conjunction with the movable iron plate 35 are respectively connected to the ascending contacts 51a and 51b and the descending contacts 56a and 56b. It comes to contact.

Next, the overall operation of the car holding device 15 will be described.
The main body 16 of the car holding device 15 may be installed when maintenance personnel perform maintenance work on the car 4. That is, when the maintenance worker performs maintenance work on the car 4, the base 17 is firmly fixed to the upper outer wall surface of the car 4 so that the car guide rail 7 a is surrounded by the recess 18. The other configuration of the main body 16 may be attached to the base 17 in advance, or may be attached to the base 17 after the base 17 is installed on the upper outer wall surface of the car 4.
Further, the movable contact 62 of the mode switch 61 is switched so as to be connected to the fixed contact 63b.
When the movable contact 62 is connected to the fixed contact 63a, a voltage is applied to the output port 73a, and the elevator control panel 10 determines that the voltage is applied to the output port 73a. Elevating operation is performed.

  Even when the movable contact 62 is connected to the fixed contact 63b, the relay coil 43 is not energized when neither the ascending button 66 nor the descending button 69 is pressed. At this time, the other end side of the movable iron plate 35 is pulled up by the urging force of the coil spring 40, the movable iron plate 35 is disposed at the maintenance work mode position shown in FIG. It contacts the guide rail 7a.

In this state, when the brake that stops the car 4 fails or when the frictional force between the main rope 8 and the driving sheave 6 decreases, the car 4 starts to self-run.
Here, the mass of the counterweight 9 is adjusted to a value obtained by adding the mass of the car 4 and the mass of various devices arranged in the car 4 to the mass of half the rated load capacity of the car 4. It is common. Accordingly, since there are no passengers in the car 4 at the time of maintenance work, the sum of the weight of the car 4, the weight of various devices arranged in the car 4, and the weight of the maintenance personnel performing the maintenance work is the weight of the counterweight 9. Smaller than. Therefore, when the car 4 is self-propelled during maintenance work, it is self-propelled upward toward the top of the hoistway 3.

  As described above, even if the car 4 is raised when the movable iron plate 35 is in the maintenance work mode position, the frictional force acts between the convex portion of the outer peripheral surface of the holding member 46 and the car guide rail 7a. Therefore, the holding member 46 remains in the same place. Then, as shown in FIG. 7, the holding member 46 bites between the car guide rail 7a and the inclined wall surface 17a only by raising the car 4 by a minute distance, so that the car 4 can be quickly raised by self-running. Stopped.

  Further, when one of the ascending button 66 and the descending button 69 of the maintenance operation control panel 60 is pressed while the movable iron plate 35 is in the maintenance operation mode position shown in FIG. 3, the relay coil 43 is energized. . As described above, at the same time that the relay coil 43 is energized, the electromagnetic force resists the biasing force of the coil spring 40, and the other end of the movable iron plate 35 is moved from the first support surface 27c with the second support surface 30c as a fulcrum. It is generated so as to be separated downward. Further, the rotation members 45a and 45b rotate so that the other end side is separated from the car guide rail 7a in conjunction with the rise of one end side in the longitudinal direction of the movable iron plate 35. Then, the rotation of the rotation members 45a and 45b is stopped when the movable iron plate 35 is moved to the car lifting / lowering permission position shown in FIG. In other words, the electromagnet 41 can be energized arbitrarily by the maintenance operation control panel 60, and the movable iron plate 35 can be held at the car lifting / lowering permission position. Therefore, the upward / downward movement of the car 4 is not restricted by the holding member 46.

Further, as the movable iron plate 35 moves to the car lifting / lowering permission position, the contact connecting members 52a and 52b come into contact with the ascending contacts 51a and 51b and the descending contacts 56a and 56b. When the button 66 is pressed, a voltage is applied to the output port 73b. That is, when the movable iron plate 35 rotates toward the car lifting / lowering permission position due to the pressing of the lifting button 66, the lift permission means 50 uses the voltage applied to the output port 73b as a lift operation signal to the elevator control panel 10. To be sent to.
When the lowering button 69 is pressed, a voltage is applied to the output port 73c. That is, when the lowering button 69 is pressed, the lowering permission means 55 rotates the movable iron plate 35 toward the car lifting / lowering permission position, and uses the voltage applied to the output port 73c as a lowering operation signal as the elevator control panel 10. To be sent to.

  The CPU of the elevator control panel 10 raises the car 4 while receiving the ascending operation signal, and lowers the car 4 while receiving the descending operation signal. Thus, the CPU of the elevator control panel 10 raises or lowers the car 4 according to the pressed button while the rising button 66 and the lowering button 69 are pressed.

  When the maintenance person releases the ascending button 66 or the descending button 69 when the car 4 is disposed at a desired height position, the energization of the relay coil 43 is cut off. At this time, the electromagnetic force that worked to move the other end of the movable iron plate 35 away from the first support surface 27 c disappears, and the other end of the movable iron plate 35 is pulled up by the biasing force of the coil spring 40. The movable iron plate 35 is again arranged at the maintenance operation mode position shown in FIG. 3, and the holding member 46 comes into contact with the car guide rail 7a.

  On the other hand, since one end side of the movable iron plate 35 is directed downward, the contact connecting members 52a and 52b are separated from the ascending contacts 51a and 51b and the descending contacts 56a and 56b. As a result, the voltage applied to the output port 73b or 73c is cut off, and the CPU of the elevator control panel 10 determines that the pressing of the ascending button 66 or the descending button 69 has been released and moves the car 4 up and down. It comes to stop.

  According to this embodiment, the main body is placed on the car 4 so that the holding member 46 is disposed in the wedge-shaped space 19 formed between the car guide rail 7a and the side wall surface 17a of the base 17 during maintenance work. The part 16 is installed. When the maintenance staff stops the car 4 and performs maintenance work, the maintenance work mode position where the movable iron plate 35 is held in contact with the first support surface 27c and the second support surface 30c is taken. When the maintenance person moves the car 4 up and down, the movable iron plate 35 is held at the car lifting permission position where the other end abuts on the second support surface 30c and separates from the first support surface 27c. It has become.

  Then, the floating members 34a and 34b are rotating members so that the holding member 46 is brought into contact with the car guide rail 7a by the urging force of the leaf springs 47a and 47b when the movable iron plate 35 is held at the maintenance work mode position. It arrange | positions so that 45a, 45b may be rotated to the surroundings of an axis | shaft. At the same time, the floating members 34a and 34b move the holding member 46 away from the car guide rail 7a against the urging force of the leaf springs 47a and 47b when the movable iron plate 35 is held at the car lifting / lowering permission position. The rotating members 45a and 45b are disposed so as to rotate about the axis.

As a result, if the car 4 is lifted by self-propelled during maintenance work by the maintenance staff, the holding member 46 is bitten between the car guide rail 7a and the side wall surface 17a of the base 17, so that the car 4 The rise due to self-running can be stopped quickly.
Further, when the maintenance person presses one of the ascending button 66 and the descending button 69, the movable iron plate 35 is forcibly moved from the maintenance work mode position to the car lifting / lowering permission position, and the elevator control panel 10 is moved to the car. 4 is raised and lowered. Accordingly, when the car 4 is moved up and down during the maintenance work of the elevator 1, it is possible to save labor for the maintenance staff to pull out the holding member 46, so that the labor required for the maintenance work can be reduced.

  In the above-described embodiment, the outer peripheral surface of the holding member 46 is described as being formed in a saw shape, but the outer peripheral surface of the holding member 46 is not limited to being formed in a saw shape. If the holding member 46 has sufficient frictional force when the outer peripheral surface of the holding member 46 comes into contact with the car guide rail 7a and the holding member 46 does not move in conjunction with the raising of the car 4, the outer periphery of the holding member 46 The shape may be flat. Further, if the holding member 46 has a sufficient frictional force when it comes into contact with the car guide rail 7a and the holding member 46 does not move in conjunction with the raising of the car 4, the holding member 46 has a circular shape. It is not necessary to form in a columnar shape, and may be a wedge shape.

  Further, the car guide rails 7a and 7b have been described as installed with their longitudinal directions aligned with the vertical direction, but the longitudinal directions of the car guide rails 7a and 7b are not limited to those aligned with the vertical direction. The present invention can also be applied to the car guide rails 7a and 7b installed so as to be inclined at a predetermined angle.

Although the first elastic member has been described as being the coil spring 40, the first elastic member is not limited to being the coil spring 40, and a leaf spring may be used.
Further, the second elastic member is described as being the leaf springs 47a and 47b. However, the second elastic member is not limited to being the leaf springs 47a and 47b, and may be a coil spring or the like.

  Moreover, although the electromagnet 41 was described so that the lower end surface of the iron core 42 was disposed so as to face the upper surface of the movable iron plate 35 and generated an electromagnetic force that pulls up one end side of the movable iron plate 35 when energized, 41 may be arranged on the base 17 so that the upper end surface of the iron core 42 faces the lower surface of the movable iron plate 35. At this time, the electromagnet 41 may be configured to generate an electromagnetic force that turns one end of the movable iron plate 35 away from the iron core 42 when energized.

  In the above-described embodiment, the movable member is described as the movable iron plate 35 formed of iron of magnetic material. However, the movable member is not limited to the one using the movable iron plate 35. For the movable member, a permanent magnet is used so that electromagnetic force acts between the movable member and the electromagnet 41 on a non-magnetic material having a shape similar to that of the movable iron plate 35 or other nonmagnetic material. A partially fixed one or the like may be used.

1 is a schematic view of an elevator provided with a car holding device according to the present invention. It is II-II arrow sectional drawing of FIG. It is the A section expanded sectional view of FIG. It is the front view seen from the B direction of FIG. It is a VV arrow directional cross-sectional view of FIG. 1 is a system configuration diagram of a car holding device according to the present invention. FIG. It is sectional drawing of the cage holding | maintenance apparatus which concerns on this invention. It is sectional drawing of the cage holding | maintenance apparatus which concerns on this invention.

Explanation of symbols

  4 car, 7a, 7b car guide rail, 10 elevator control panel, 15 car holding device, 17 base, 17a side wall surface (inclined wall surface), 19 wedge-shaped space, 27 first guide member, 27c first support surface, 30 Second guide member, 30c Second support surface, 34a, 34b Floating member, 35 Movable iron plate (movable member), 40 Coil spring (first elastic member), 41 Electromagnet, 45a, 45b Rotating member, 46 Holding member, 47a, 47b Leaf spring (second elastic member), 50 ascent permitting means, 55 descending permitting means, 60 maintenance operation control panel, 70 ascent switch, 71 descending switch.

Claims (2)

A base having an inclined wall surface that is detachably disposed on the upper part of the car and forms a wedge-shaped space that gradually narrows downward from above with the car guide rail;
A horizontal first disposed at a position spaced apart from the wedge-shaped space by a first distance in a direction away from the car guide rail, and at a first height above the base and facing downward. A first guide member having a support surface;
Downward from the first support surface to a position closer to the wedge-shaped space by a second distance and upward from the base to a second height position lower than the first height position. A second guide member having a disposed horizontal second support surface;
A movable member having one end positioned on the wedge-shaped space and the other end arranged to be engageable with the first support surface and the second support surface;
The other end side of the movable member is disposed so as to be urged in a direction in contact with the first support surface and the second support surface, and the other end side of the movable member is disposed on the first support surface and the first support surface. A first elastic member that holds the movable member at a holding operation mode position that abuts against the two support surfaces;
The movable member is rotated against the urging force of the first elastic member so that the other end side of the movable member is separated downward from the first support surface with the second support surface as a fulcrum. An electromagnet that generates electromagnetic force, holds the movable member at a car lifting permission position where the other end side of the movable member abuts on the second support surface and is separated from the first support surface;
One end of the movable member is pivotally attached to one end of the movable member, the other end side is disposed in the wedge-shaped space, and the other end is interlocked with the pivoting movement around the axis, and the car guide rail and the above-mentioned A rotating member that moves between inclined wall surfaces;
A holding member attached to the other end of the rotating member;
A second elastic member disposed between the rotating member and the movable member and biasing the rotating member in a direction in which the holding member is brought into contact with the car guide rail;
In a state where the movable member is held at the maintenance work mode position, the holding member is brought into contact with the car guide rail by the urging force of the second elastic member, and the movable member is held at the car lifting / lowering permission position. In this state, a floating member that rotates the rotating member around the axis so as to separate the holding member from the car guide rail against the urging force of the second elastic member;
A maintenance operation control panel that energizes the electromagnet to generate electromagnetic force and holds the movable member at the car lifting / lowering permission position;
When the car rises in a state where the movable member is held at the maintenance work mode position, the friction force between the holding member and the car guide rail that are in contact by the urging force of the second elastic member causes the The movable member rotates against the urging force of the first elastic member with the first support surface as a fulcrum so as to move away from the second support surface, and the holding member is connected to the car guide rail. An elevator car holding device configured to bite between the inclined wall surfaces and stop the raising of the car. An ascending switch and a descending switch arranged to be capable of switching ON / OFF of energization to the electromagnet,
Ascending permission means for transmitting a raising operation signal of the car to an elevator control panel that controls raising and lowering of the car when energization to the electromagnet is switched ON by the raising switch;
Lowering permission means for transmitting a lowering operation signal of the car to the elevator control panel when energization of the electromagnet is switched ON by the lowering switch;
The elevator car holding device according to claim 1, further comprising:

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