JP2011126680A - Elevator device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elevator device capable of stabilizing its shock absorbing characteristic, by maximally utilizing a shock absorbing stroke of a shock absorber. <P>SOLUTION: The elevator device is provided by superposably arranging the shock absorber 8 having a cylinder and a plunger, in a plurality of stages in the shock absorbing action direction, on a pit 1a of a hoistway lower part. The elevator device is provided with a guide means 14 having a base material 14a for placing an upper stage shock absorber 8a and a guide rail 14c for guiding this base material 14a in the shock absorbing action direction; and an elastic body 15 arranged in parallel to a lower stage shock absorber 8b and supporting dead weight of the upper stage shock absorber 8a and the base material 14a, and holds its plunger 8b2 in an extending state by putting the lower stage shock absorber 8b in a load-unapplied state at ordinary time. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an elevator apparatus in which an oil-filled shock absorber having a cylinder and a plunger is installed as a shock absorber for an elevator car or a counterweight.

  Elevator devices are generally equipped with a shock absorber, for example, oil, at the bottom of the hoistway in case the car moving up and down the hoistway does not stop at the lowest floor for some reason and should descend toward the bottom of the hoistway. An incoming shock absorber is installed.

  By the way, in an elevator with a large rated speed such as an ultra-high speed elevator, the buffer stroke required for the shock absorber becomes large, so that the device itself becomes large and difficult to manufacture and install, and the price is high. was there. Therefore, conventionally, a structure has been proposed in which a plurality of shock absorbers are arranged in series in the vertical direction so that it can be used for an elevator with a large rated speed without requiring an increase in the size of each shock absorber (for example, patents). Reference 1).

Japanese Patent Laid-Open No. 04-189288 (FIG. 1) JP 05-155554 (paragraph number 0014, FIG. 1)

  However, the above-described conventional one has a structure in which the load of the upper shock absorber and the base material on which the upper shock absorber is mounted is always supported by the lower shock absorber. That is, the plunger of the lower shock absorber is always depressed to some extent. Therefore, there is a problem that the effective buffer stroke as a shock absorber is reduced, and there is a problem that the buffer characteristics vary and test evaluation becomes difficult.

  The present invention has been made from the above-described prior art, and an object of the present invention is to provide an elevator apparatus that can make maximum use of the buffer stroke of the shock absorber and can stabilize the buffer characteristics. It is in.

  In order to achieve the above object, the present invention provides an elevator apparatus in which a shock absorber provided with a cylinder and a plunger is stacked in a plurality of stages in a shock-absorbing action in a lower pit of a hoistway. And a guide means having a guide rail for guiding the base material in the buffering action direction, and an elastic body arranged in parallel with the lower shock absorber and supporting the weight of the upper shock absorber and the base material. It is characterized by providing.

  In this invention comprised in this way, the upper stage shock absorber and the dead weight of the base material in which this upper stage shock absorber is mounted are supported by the elastic body. Therefore, normally, the lower shock absorber is in an unloaded state, and the plunger is also in an extended state. As a result, the buffer stroke of the shock absorber can be utilized to the maximum and its buffer characteristics can be stabilized.

  In the present invention, the upper shock absorber and the lower shock absorber are arranged in a horizontal direction while being shifted, and a step is provided in the base member, and the mounting position of the upper shock absorber on the base member is It is characterized in that it is located below the upper end of the plunger of the lower shock absorber.

  In this invention comprised in this way, while lowering the installation position of an upper stage shock absorber, while ensuring a buffer stroke as the whole shock absorber, the height dimension of the whole shock absorber can be restrained small.

  Further, the present invention is the one in which the upper shock absorber and the lower shock absorber are arranged in series in the buffer action direction, and the height dimension of the guide rail separately provided for the shock absorber is the height of the lower shock absorber. It is characterized by being set larger than the dimension and smaller than the value obtained by subtracting the stroke dimension of the entire shock absorber from the height dimension of the entire shock absorber.

  In the present invention configured as described above, the upper shock absorber and the lower shock absorber are arranged in series in the buffer action direction, and the height of the guide rail is optimized so that the lifting body does not collide with the guide rail during buffering. Can be

  Furthermore, the present invention is characterized in that the step size of the base member is set smaller than a value obtained by subtracting the stroke size of the lower shock absorber from the height size of the lower shock absorber.

  In the present invention configured as described above, the step size of the base member can be optimized so that the base material does not collide with the pit floor surface during buffering.

  In addition, the height of the guide rail separately provided for buffering is larger than the value obtained by subtracting the step of the base member from the height of the lower shock absorber, and the height of the entire shock absorber is buffered. It is characterized by being set smaller than the value obtained by subtracting the stroke size of the entire vessel.

  In the present invention configured as above, the upper shock absorber and the lower shock absorber are arranged in a horizontal direction and shifted, and the base member is provided with a step so that the lifting body does not collide with the guide rail at the time of buffering. Thus, the height dimension of the guide rail can be optimized.

  According to the present invention, by supporting the own weight of the upper shock absorber and the base material on which the upper shock absorber is mounted by the elastic body, it is possible to make maximum use of the shock absorbing stroke of the shock absorber. Thus, the buffer efficiency can be improved and the waste of equipment can be reduced. In addition, the shock absorbing characteristics of the shock absorber can be stabilized, and the test evaluation can be made easier.

It is a schematic block diagram of an elevator apparatus. It is a front view which shows one Example of the elevator apparatus which concerns on this invention. It is a front view which shows the other Example of the elevator apparatus which concerns on this invention.

  Embodiments of an elevator apparatus according to the present invention will be described below with reference to the drawings.

  In general, as shown in FIG. 1, an elevator apparatus is lifted and lowered in a hoistway 1, that is, a car 2 and a counterweight 3, and is fixed to the hoistway wall via a rail bracket 4, and the car 2 and the counterweight. 3 is a guide rail 5 for raising and lowering body which guides the raising and lowering of 3, a main rope 7 whose end is connected to the car 2 and the counterweight 3, and an intermediate part wound around the hoisting machine 6, and the lower part of the hoistway 1 And a shock absorber 8 installed so as to face the car 2 and the counterweight 3. As a safety device, a governor rope 9 is connected to both ends of an arm attached to the car 2 to form a loop of the governor rope 9. This loop is wound around the governor 10 in the machine room, and hangs the tension wheel 11 on the bottom side of the hoistway 1. Further, a tail cord 12 for transmitting power and signals to the car 2 from the fixed side is provided, and a compen- sion rope 13 for connecting the car 2 and the counterweight 3 is provided.

  In this embodiment, as shown in FIG. 2, the shock absorber 8 is installed in two stages in series in the buffer action direction. That is, the upper stage buffer 8a and the lower stage buffer 8b are provided. The guide means includes a base member 14a on which the upper shock absorber 8a is placed, and buffer guide rails 14c that are engaged via the base member 14a and the guide member 14b and guide the base member 14a in the buffer action direction. 14 is provided. Furthermore, an elastic body 15 that is arranged in parallel with the lower shock absorber 8b and supports the weight of the base material 14a including the upper shock absorber 8a and the guide material 14b, and a table 16 on which the elastic body 15 is placed are provided. ing.

  The upper shock absorber 8a has a cylinder 8a1 fixed to the base member 14a and a plunger 8a2 engaged with the cylinder 8a1 so as to be movable in the vertical direction. The lower shock absorber 8b has a cylinder 8b1 fixed to the pit 1a and a plunger 8b2 engaged with the cylinder 8b1 so as to be movable in the vertical direction. The upper end of the plunger 8b2 is in contact with the base material 14a.

  The elastic body 15 has an elastic constant such that the upper end of the elastic body 15 is substantially at the same height as the upper end of the lower shock absorber 8b when the weight of the base material 14a including the upper shock absorber 8a and the guide member 14b is applied. Is set. Moreover, the elastic body 15 can be comprised, for example with a spring or rubber | gum.

  The height dimension L1 of the buffering guide rail 14c is larger than the height dimension h2 of the lower shock absorber 8b in order to prevent the lifting body from colliding with the buffering guide rail 14c during buffering, and the height of the entire shock absorber. It is set to be smaller than a value obtained by subtracting the stroke size of the entire shock absorber, that is, (S1 + S2) from the dimension H1. Therefore, the relationship of h2 <L1 <H1- (S1 + S2) is established.

  In this embodiment, normally, the weight of the base material 14a including the upper shock absorber 8a and the guide material 14b is supported by the elastic body 15, and the lower shock absorber 8b is not loaded. . Accordingly, the plunger 8b2 of the lower shock absorber 8b is in an extended state. When the lifting body, for example, the car 2 does not stop at the lowest floor for some reason, and descends toward the bottom of the hoistway and collides with the shock absorber 8, the upper surface of the plunger 8a2 of the upper shock absorber 8a touches the bottom of the car 2 In contact therewith, the plunger 8a2 of the upper shock absorber 8a and the plunger 8b2 of the lower shock absorber 8b descend to cushion the impact and also compress the elastic body 15. At this time, the base member 14a is guided in the buffer action direction by the buffer guide rail 14c through the guide member 14b, so that the fluctuation in the horizontal direction is constrained and a stable buckling operation can be performed as the entire shock absorber. it can.

  According to the present embodiment, by supporting the own weight of the upper shock absorber 8a and the base material 14a on which the upper shock absorber 8a is placed by the elastic body 15, the buffer stroke of the shock absorber 8 can be maximized. This makes it possible to improve the buffer efficiency and reduce the waste of equipment. In addition, the buffer characteristics of the shock absorber 8 can be stabilized, and the test evaluation can be made easier.

  Next, another embodiment of the elevator apparatus according to the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the thing equivalent to what was mentioned above.

  In the elevator apparatus of the second embodiment, as shown in FIG. 3, a shock absorber 8 is provided between two upper shock absorbers 18a and 28a arranged in parallel in the horizontal direction and these upper shock absorbers 18a and 28a. Two lower-stage shock absorbers 18b and 28b arranged in parallel in the horizontal direction are provided. Further, a base member 24a on which the upper shock absorbers 18a and 28a are placed, and a buffering guide rail 24c that is engaged with the base member 24a through the guide member 24b and guides the base member 24a in the buffer action direction. Guide means 24 is provided. Further, an elastic body 25 that is arranged in parallel with the lower shock absorbers 18b and 28b and supports the weight of the base material 24a including the upper shock absorbers 18a and 28a and the guide material 24b, and a table 26 on which the elastic body 25 is placed. And are provided.

  The upper shock absorber 18a has a cylinder 18a1 fixed to the base material 24a and a plunger 18a2 engaged with the cylinder 18a1 so as to be movable in the vertical direction, and the upper shock absorber 28a is fixed to the base material 24a. It has a cylinder 28a1 and a plunger 28a2 engaged with the cylinder 28a1 so as to be movable in the vertical direction. The lower shock absorber 18b has a cylinder 18b1 fixed to the pit 1a and a plunger 18b2 engaged with the cylinder 18b1 so as to be movable in the vertical direction. The lower shock absorber 28b is a cylinder 28b1 fixed to the pit 1a. And a plunger 28b2 engaged with the cylinder 28b1 so as to be movable in the vertical direction.

  The upper shock absorbers 18a and 28a and the lower shock absorbers 18b and 28b are arranged in a horizontal direction and shifted, and a step is provided on the base material 24a on which the upper shock absorbers 18a and 28a are placed. The mounting positions of the upper shock absorbers 18a and 28a on the base member 24a are set below the upper ends of the plungers 18b2 and 28b2 of the lower shock absorbers 18b and 28b.

  The height dimension L2 of the buffering guide rail 24c is set so that the step dimension B of the base member 24a is reduced from the height dimension h2 of the lower shock absorbers 18b and 28b in order to prevent the lifting body from colliding with the buffering guide rail 24c during buffering. It is set to be larger than the subtracted value and smaller than the value obtained by subtracting the stroke size of the entire shock absorber, that is, (S1 + S2) from the height size H2 of the entire shock absorber. Therefore, the relationship of h2-B <L2 <H2- (S1 + S2) is established.

  According to the second embodiment, by lowering the installation positions of the upper shock absorbers 18a and 28a, the shock absorber stroke (S1 + S2) as the shock absorber 8 is secured and the height dimension of the shock absorber 8 is kept small. Can do. Further, by providing the two upper shock absorbers 18a and 28a and the two lower shock absorbers 18b and 28b, the buffer capacity of the shock absorber 8 as a whole can be increased without increasing the size of each shock absorber. .

  In the second embodiment, the upper shock absorber and the lower shock absorber are arranged so as to be shifted in the horizontal direction, and two upper shock absorbers and two lower shock absorbers are provided. However, the number of upper shock absorbers and lower shock absorbers can be arbitrarily set according to the elevator specifications. Further, in each of the above-described embodiments, in order to guide the base members 14a and 24a in the buffering action direction, the buffer guide rails 14c and 24c are separately provided. However, the present invention is not limited thereto, You may make it guide the base materials 14a and 24a using the guide rail 5 which guides the elevator car 2 or the counterweight 3 in the ascending / descending direction, and in that case, there are restrictions on the length and arrangement of the guide rails. Absent.

1 hoistway 1a pit
2 car 3 counterweight 4 rail bracket 5 guide rail for lifting body 6 hoisting machine 7 main rope 8 shock absorber 8a, 18a, 28a upper shock absorber 8b, 18b, 28b lower shock absorber 9 governor rope 10 governor 11 tensioning vehicle 12 Tail cord 13 Compen rope 14, 24 Guide means 14a, 24a Base material 14b, 24b Guide material 14c, 24c Buffer guide rail 15, 25 Elastic body 16, 26 units

Claims (5)

In an elevator apparatus in which a shock absorber provided with a cylinder and a plunger is stacked in a plurality of stages in a buffer action direction in a pit at the lower part of the hoistway,
A base material on which the upper shock absorber is placed, guide means having a guide rail for guiding the base material in the buffer action direction, and a lower shock absorber are arranged in parallel, and the upper weight of the upper shock absorber and the base material are reduced. An elevator apparatus comprising an elastic body to be supported.   The upper shock absorber and the lower shock absorber are arranged in a horizontal direction so as to be shifted, a step is provided in the base member, and the mounting position of the upper shock absorber on the base member is determined by the plunger of the lower shock absorber. The elevator apparatus according to claim 1, wherein the elevator apparatus is located below the upper end.   The upper shock absorber and the lower shock absorber are arranged in series in the buffer action direction, and the height dimension of the guide rail separately provided for shock absorber is larger than the height dimension of the lower shock absorber, The elevator apparatus according to claim 1, wherein the elevator apparatus is set smaller than a value obtained by subtracting a stroke dimension of the entire shock absorber from a height dimension of the entire shock absorber.   The elevator apparatus according to claim 2, wherein the step size of the base member is set to be smaller than a value obtained by subtracting a stroke size of the lower shock absorber from a height size of the lower shock absorber.   The height of the guide rail separately provided for buffering is larger than the value obtained by subtracting the step of the base member from the height of the lower shock absorber, and the height of the shock absorber as a whole. The elevator apparatus according to claim 2, wherein the elevator apparatus is set to be smaller than a value obtained by subtracting the stroke dimension.

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