JP2006298611A - Buffer device for elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a buffer device for an elevator capable of easily switching height in response to respective stop positions of a car at usual operation and maintenance work of the elevator, certainly preventing damage of the car at the maintenance work and effectively utilizing a space in a hoistway. <P>SOLUTION: The buffer device for the elevator is provided with a base body 2 provided in a hoistway pit of the elevator; a movable support 3 guided by the base body and vertically movably provided; a shock-absorbing body 4 provided projected upwardly on an upper end of the movable support; and a bulk raising base 5 placed with the upwardly moved movable support and adjusting the height of the shock-absorbing body. The height of the shock-absorbing body makes homologous to the stop position of the car at the usual operation of the elevator when the movable support is placed on the bulk raising base and makes homologous to the stop position of the car at maintenance work of the elevator when the bulk raising base is removed from below the movable support and the movable support is downwardly moved. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a buffer device provided in a pit of an elevator hoistway.

  In the pit of the elevator hoistway, a buffer device is erected directly below the car that moves up and down in the hoistway. This buffer device is a safety device installed in order to reduce the impact at the time of collision when the car collides with the bottom of the hoistway and ensure the safety of passengers in the car room. Absorbs the impact when the car collides with the buffer provided. The buffer body of the buffer device includes a spring type and an oil-filled type, and the installation position, stroke length, etc. are appropriately set based on the lifting speed, lifting distance, weight, rated load, etc. of the car. .

  Some of the buffer devices are configured such that the height of the upper end portion thereof can be switched corresponding to each stop position of the car during normal elevator operation and maintenance work. That is, the elevator car does not move below the stop position at the elevator floor on the lowest floor during normal operation. Therefore, the buffer device is usually installed corresponding to the stop position of the car at the elevator floor on the lowest floor, and is arranged as high as possible in order to shorten the fall distance of the car. On the other hand, at the time of elevator maintenance work, for example, when a maintenance worker performs maintenance work on the landing door device provided on the lowest floor on the upper surface of the car, the car is placed below the stop position at the elevator landing on the lowest floor. May be moved. In such a case, when the car is lowered, the lower part of the car interferes with the upper end of the buffer device, so that the height of the upper end of the buffer device corresponds to the stop position of the car during maintenance work. It is necessary to switch so low.

  As a conventional technique of the buffer device having the above-described configuration, the buffer device includes a base plate that is rotatably provided on a fixed body in a hoistway pit via a rotary joint, and a coil spring that is erected on the base plate. By tilting the buffer and erecting the base plate, the elevator car can be moved further down than the stop position at the elevator floor on the lowest floor during the maintenance work of the elevator. Thus, there has been proposed one in which a car is stopped and held by a buffer rubber fixed to the upper end portion of the base plate (for example, see Patent Document 1).

JP-A-5-201647

  In the elevator buffer device described in Patent Document 1, the car is stopped and held by a base plate made of steel or the like at the time of maintenance work. Therefore, when the cushioning effect of the buffer rubber fixed to the upper end portion is small, the lower part of the car is There was a risk of damage. In addition, since the position where the shock absorber faces the car during normal operation and the position where the shock absorber faces the car during maintenance work, the buffer receiver and other reinforcements at each position where the shock absorber and shock absorber face the lower part of the car. It was necessary to give. For this reason, the problem that the space in a hoistway pit and the lower part of a cage | basket | car cannot be used effectively also arises.

  The present invention has been made to solve the above-described problems, and its object is to easily switch the height corresponding to each stop position of the car during normal elevator operation and maintenance work. Another object of the present invention is to provide an elevator buffer device capable of reliably preventing damage to a car during maintenance work and effectively utilizing the space in the hoistway.

  An elevator buffer device according to the present invention includes a base provided in a hoistway pit of an elevator, a movable support that is guided by the base so as to be movable in the vertical direction, and an upper end portion of the movable support. And a raised base that adjusts the height of the buffer body on which the movable support body that has been moved upward is placed. Corresponds to the stop position of the car during normal operation of the elevator when it is placed on the raising platform, and the elevator stops when the raising platform is removed from the lower side of the movable support and the movable support moves downward. It corresponds to the position.

  The present invention includes a base provided in a hoistway pit of an elevator, a movable support that is guided by the base so as to be movable in the vertical direction, and projects upward from the upper end of the movable support. Provided with a buffer body and a raising base on which the movable support body moved upward is placed to adjust the height of the buffer body, and the height of the buffer body is such that the movable support body is placed on the raising base. Corresponding to the stop position of the car during normal operation of the elevator, and corresponding to the stop position of the car during elevator maintenance work when the raising base is removed from below the movable support and the movable support moves downward. As a result, the height can be easily switched according to each stop position of the car during normal elevator operation and maintenance work, and damage to the car during maintenance work can be reliably prevented and Special It is possible to effectively utilize the scan.

  In order to explain the present invention in more detail, it will be described with reference to the accompanying drawings. In addition, in each figure, the same code | symbol is attached | subjected to the part which is the same or it corresponds, The duplication description is simplified or abbreviate | omitted suitably.

Embodiment 1 FIG.
1 is a configuration diagram of an elevator buffer device according to Embodiment 1 of the present invention, and FIG. 2 is a longitudinal sectional view thereof. First, based on FIG.1 and FIG.2, the structure of the buffer apparatus standingly arranged in the pit of the elevator hoistway is demonstrated. A hoistway fixing body 1 including a support beam (not shown), a hoistway bottom, and the like provided over the lower end of a car guide rail (not shown) has a substantially cylindrical base 2 standing thereon. Has been. The base body 2 has a substantially circular opening 2a on its upper surface, which has a slightly smaller crossing than the hollow portion having a substantially columnar shape and communicates with the hollow portion. An opening 2b having a substantially rectangular shape in side view is formed.

  Reference numeral 3 denotes a movable support that is provided in the hollow portion of the base 2 and is configured to be movable in the vertical direction in the hollow portion of the base 2 by being guided by the inner surface of the hollow portion. The movable support 3 has a substantially cylindrical shape whose transverse section is slightly smaller than the opening 2a formed on the upper surface of the base 2, and a substantially ring-shaped locking body projecting outward at the lower end thereof. 3a is provided. The locking body 3a is provided to have a diameter larger than that of the opening 2a formed on the upper surface of the base body 2, and the movable support body 3 includes the locking body 3a and the opening portion 2a. It is possible to move upward in the hollow portion of the base 2 until it is locked by the step formed at the boundary. By moving the movable support 3 upward, the upper end portion of the movable support 3 protrudes above the base 2 through the opening 2 a formed on the top surface of the base 2.

  Reference numeral 4 denotes a shock absorber made of a coil spring or the like that protrudes upward from the center of the upper surface of the movable support 3, and 5 moves upward by being taken in and out of the hollow portion of the base 2 from the opening 2 b. The raised support base 3 on which the movable support body 3 is placed and the height of the buffer body 4 is adjusted in two stages, and 6 is movable when the movable support body 3 is moved upward and placed on the lift stage 5. It is a fixing means for detachably fixing the raising base 5 that supports the support 3 to the base 2. The fixing means 6 may have any configuration as long as it can securely fix the raising base 5 to the base body 2. In FIGS. 1 and 2, the fixing means 6 is attached to the cylindrical portion of the base body 2 and the raising base 5. In the figure, a rod-like pin is inserted through a straight through hole to fix the raising base 5.

  Next, each configuration of the buffer device during normal operation and maintenance work of the elevator will be described. FIG. 3 is a side view of an essential part during normal operation of the elevator apparatus including the buffer device shown in FIG. In FIG. 3, during normal operation of the elevator, the buffer device is erected in the pit 8 of the hoistway 7 with the movable support 3 placed on the raising platform 5. Here, the buffer device is disposed below the elevator car 9 that moves up and down in the hoistway 7, and the height of the buffer body 4 disposed above the raising platform 5 and the movable support 3 is the lowest. It is set corresponding to the stop position of the car 9 in the elevator hall 10 on the floor. Further, a buffer receiver 11 projects downward from the lower surface of the car 9 at a position directly above the buffer body 4 of the buffer device.

  FIG. 3 shows a state in which the car 9 is stopped at the elevator hall 10 on the lowest floor, and the car 9 includes a car doorway formed in the car 9 and a hall doorway formed in the hall 10. Are stopped at a predetermined stop position facing each other. In such a state, the car door device 12 provided above the upper edge portion of the car doorway and the landing door device 13 provided above the upper edge portion of the lowest floor hall doorway are in the opposing positions, and the buffer receiver 11 And a buffer 4 is formed with a predetermined gap.

  On the other hand, FIG. 4 is a side view of an essential part during maintenance work of the elevator apparatus including the buffer device shown in FIG. In FIG. 4, during the maintenance work of the elevator, the buffer device is moved downward in the hollow portion of the base body 2 by releasing the fixing means 6 and removing the raising base 5 from the hollow portion of the base body 2. In this state, it is erected in the pit 8 of the hoistway 7. Here, in the buffer device, the height of the buffer body 4 is lowered by the height of the raising base 5 as compared with the state during normal operation. In addition, the height of the buffer body 4 in this state is set corresponding to the stop position of the car 9 during the elevator maintenance work. Moreover, since the movable support 3 moves vertically, the buffer 4 during maintenance work is also located immediately below the buffer receiver 11 as in normal operation.

  FIG. 4 shows a state in which a maintenance worker performs maintenance / inspection work on the car door device 12 from the lowest floor landing 10 during the maintenance work of the elevator, or from the upper surface of the car 9 to the lowermost landing door device 13. The state in which the maintenance and inspection work is performed is shown, and the car 9 is moved further downward than the stop position of the lowest floor landing 10 during normal operation so that the weight is supported by the buffer 4. It has stopped. That is, the car 9 is moved downward until the buffer receiver 11 comes into contact with the buffer body 4 of the buffer device, and is placed on the buffer body 4 so that the stopped state is maintained.

  In the case of returning to the normal operation from the state at the time of the maintenance work, after moving the car 9 above the stop position at the landing 10 on the lowest floor, the movable support 3 is lifted upward, The movable support portion 3 is placed on the raising base 5 disposed in the hollow portion of the base 2 through the opening 2b. And the raising stand 5 is fixed to the base | substrate 2 with a fixing means.

  According to Embodiment 1 of the present invention, the movable support 3 is moved up and down, and the raising base 5 is inserted and removed, so that the height of the buffer device can be set to each stop of the car during normal elevator operation and maintenance work. It is possible to easily switch according to the position. Further, since the buffer body 4 is opposed to the buffer receiver 11 during normal operation and maintenance work, even when the car 9 is placed on the buffer device and stopped during maintenance work, the lower part of the car 9 There is no risk of damage. That is, by adopting the buffer body 4 having a large buffering effect, such as a coil spring, even when the descending speed of the car 9 is somewhat faster when the buffer receiver 11 contacts the buffer body 4, the buffer body 4 can transfer the kinetic energy. It is possible to absorb and stop the car 9 without damaging the lower part of the car 9.

  In addition, by using the buffer device having the above configuration, the space in the hoistway can be effectively used. In other words, since the buffer body 4 is disposed so as to face the buffer receiver 11 during normal operation and maintenance work, it is not necessary to add extra reinforcement to the lower portion of the car 13 other than the buffer device 14. Further, since a part of the buffer device during normal operation, that is, the buffering device 5 can be switched to the buffer device during maintenance work by removing the raising base 5, no dedicated parts or the like are required during maintenance work. Since the raising platform 5 and the movable support 3 are arranged in a straight line in the vertical direction, the space in the pit 8 can be used effectively.

It is a block diagram of the buffer device of the elevator in Embodiment 1 of this invention. It is a longitudinal cross-sectional view of the buffer device of the elevator in Embodiment 1 of this invention. It is a principal part side view at the time of normal operation of the elevator apparatus provided with the buffer apparatus shown in FIG. It is a principal part side view at the time of the maintenance work of an elevator apparatus provided with the buffer apparatus shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hoistway fixed body 2 Base | substrate 2a, 2b Opening part 3 Movable support body 3a Locking body 4 Buffer body 5 Raising stand 6 Fixing means 7 Hoistway 8 Pit 9 Car 10 Platform 11 Buffer receiver 12 Car door device 13 Platform door device

Claims (5)

  A base provided in an elevator hoistway pit, a movable support guided by the base so as to be movable in the vertical direction, and a buffer projecting upward at the upper end of the movable support And a raised base for adjusting the height of the buffer body on which the movable support body moved upward is placed. The height of the buffer body is such that the movable support body is placed on the raised base. Corresponding to the stop position of the car during normal operation of the elevator, and when the movable support body moves downward from the lower side of the movable support body and moves to the lower position of the car during elevator maintenance work. An elevator buffer device characterized by correspondingly.   2. The elevator buffer apparatus according to claim 1, further comprising a fixing means for detachably fixing the raising base on which the movable support is placed to the base.   The base body has a cylindrical shape, the movable support moves in the vertical direction in the hollow portion of the base body, and the raising base is disposed in the hollow portion of the base body from an opening formed on a side surface of the base body. The elevator buffer device according to claim 1 or 2.   4. The elevator buffer device according to claim 3, wherein the fixing means is a pin inserted through a through hole formed in a straight line in the cylindrical portion of the base body and the raising base. The elevator buffer device according to any one of claims 1 to 4, wherein the buffer body is configured by a coil spring.

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