Elevator counterweight and method for assembling the counterweight

Abstract

A counterweight for balancing between elevator cars, said counterweight having: a frame body which has a pair of vertical beams, an upper beam and a lower beam; a support column which stands upright inside the frame body; and a plurality of weights which each have a recess which engages the support column and an engaging part which engages one of the vertical beams, and are mounted to the frame body between the support column and one of the vertical beams.

Description

Technical Field

[0001] The present invention relates to a counterweight of an elevator and a method for assembling the counterweight.

Background Art

[0002] As a technology related to a counterweight of an elevator and a method for assembling the counterweight, there is a technology disclosed in Patent Document 1 below. In this Patent Document 1, it is described that "since the adjusting weight is divided into two in the direction connecting the pair of left and right vertical beams (left - right direction), and the left - right dimension thereof is half of that of the main weight, the adjusting weight can be inserted and mounted inside the frame without tilting it. … The adjusting weight has an engaging portion that engages with an adjacent adjusting weight to prevent displacement in a direction perpendicular and horizontal to the direction connecting the pair of left and right vertical beams."

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, when mounting an adjusting weight with such a configuration on a frame, with the adjusting weight arranged between the vertical beams, one end side of the adjusting weight is engaged with an adjacent adjusting weight, or the other end side of the adjusting weight is inserted into the frame, whereby the adjusting weight is supported and positioned with respect to the frame. For this reason, the support and positioning of the adjusting weight with respect to the frame are in a very unstable state, and the workability of assembling the counterweight is poor.

[0005] Therefore, an object of the present invention is to provide a counterweight of an elevator and a method for assembling the counterweight that can be assembled with good workability.

Means for Solving the Problems

[0006] In order to solve the above problems, for example, the configuration described in the claims is adopted. This application includes a plurality of means for solving the above problems. As an example, a counterweight for balancing with a car, which has a frame having a pair of vertical beams, an upper beam, and a lower beam, a support column erected in the frame, a recess fitted to the support column, and a fitting portion fitted to one of the pair of vertical beams, and a plurality of weights mounted on the frame between the support column and one of the pair of vertical beams.

Effect of the Invention

[0007] According to the present invention, it is possible to provide a counterweight for an elevator that can be assembled with good workability and a method for assembling the counterweight.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Mode for Carrying Out the Invention

[0009] ≪Counterweight for Elevator≫ FIG. 1 is a configuration diagram of a counterweight 1 for an elevator according to an embodiment, which is a plan sectional view (a) and a front view (b). The counterweight 1 shown in these figures has a frame 10, a support column 20 fixed inside the frame 10, and weights 100 mounted inside the frame 10. These are configured as follows.

[0010] <Frame 10> The frame body 10 has a pair of left and right vertical beams 11L and 11R, an upper beam 12, and a lower beam 13. Among these, the vertical beams 11L and 11R are made of channel steel and are arranged with the openings of the channels facing each other.

[0011] The upper beam 12 is arranged across between the vertical beams 11L and 11R above the pair of vertical beams 11L and 11R and is fixed to these vertical beams 11L and 11R at the ends. On the other hand, the lower beam 13 is arranged parallel to the upper beam 12 below the pair of vertical beams 11L and 11R, is spanned between the vertical beams 11L and 11R, and is fixed to these vertical beams 11L and 11R at the ends. Thus, the vertical beams 11L and 11R, the upper beam 12, and the lower beam 13 constitute the frame body 10 having a substantially rectangular frame shape.

[0012] Also, a plurality of guide members 10a are fixed to the vertical beams 11L and 11R of the frame body 10. These guide members 10a are fixed to the outside of the frame body 10 above and below each of the vertical beams 11L and 11R. These four guide members 10a are made of channel steel arranged in the vertical direction along the vertical beams 11L and 11R and are fixed to the vertical beams 11L and 11R with the openings of the channels facing the outside of the frame body 10. Such guide members 10a include two that are erected outside the vertical beams 11L and 11R and are 2L, 2R slidably engaged with the guide rails respectively to guide the lifting and lowering of the counterweight 1.

[0013] Note that the frame body 10 may have cutout portions 11b at the portions directly below the upper beam 12 in the vertical beams 11L and 11R. These cutout portions 11b are cutout portions provided in the flanges of the vertical beams 11L and 11R made of channel steel and are formed as needed as portions into which the ends of the weight 100 described later are inserted when the weight 100 is attached to the frame body 10. Also, when the cutout portions 11b are formed in the vertical beams 11L and 11R, it is assumed that covers 11c for closing the cutout portions 11b are fixed to the vertical beams 11L and 11R.

[0014] The frame body 10 as described above has a sheave 3 fixed to the upper beam 12. A main rope 4 is wound around the sheave 3. The main rope 4 is wound around a hoisting machine (not shown here) and a sheave fixed to the car, and is configured to move the car and the counterweight 1 with a weight 100 attached to the frame body 10 up and down in opposite directions while maintaining balance by driving the hoisting machine.

[0015] <Support column 20> The support column 20 is erected in the center of the frame body 10 and is provided with both ends fixed to the upper beam 12 and the lower beam 13. Due to this support column 20, the frame body 10 composed of the vertical beams 11L, 11R, the upper beam 12, and the lower beam 13 is horizontally divided into two parts.

[0016] The support column 20 is preferably arranged at a substantially equal distance from the pair of vertical beams 11L, 11R, and is preferably arranged on the same plane as the pair of vertical beams 11L, 11R. Thereby, the shapes of the weights 100 to be described later can all be of the same planar shape, and a plurality of weights 100 can be mounted between the pair of vertical beams 11L, 11R in a well-balanced manner.

[0017] Such a support column 20 is cylindrical, and preferably has a regular cylindrical shape with a circular bottom surface. Thereby, in the assembly of the counterweight 1 to be described later, the rotation of the weight 100 with the support column 20 as the fulcrum is smoothly carried out. Also, the size of the support column 20 is of a diameter approximately the same as or smaller than the width of the vertical beams 11L, 11R.

[0018] <Weight 100> The weight 100 is a plate-shaped member for adjusting the weight of the counterweight 1, and is mounted in a stacked state inside the frame body 10. Each weight 100 is composed of, for example, a lead plate and has its own thickness. Also, each weight 100 is characterized by its planar shape.

[0019] Each weight 100 is attached to the frame body 10 between the support column 20 and one of the pair of longitudinal beams 11L and 11R. The planar shape of each weight 100 has a main body portion 101 with a substantially rectangular shape having as its long side the length obtained by dividing the space between the longitudinal beams 11L and 11R into two. Further, the main body portion 101 has a convex portion 102 protruding from one short side of the rectangular shape and a concave portion 103 provided in the other short side portion of the rectangular shape.

[0020] Among these, the convex portion 102 is a fitting portion with the longitudinal beams 11L and 11R and has a rectangular shape to be fitted into the longitudinal beams 11L and 11R made of grooved steel. Further, the concave portion 103 has a semi-circular notch shape for fitting with the support column 20, and the flat cross-section of the inner wall is semi-circular. Thereby, in the assembly of the counterweight 1 described hereinafter, the rotation of the weight 100 with the support column 20 as the fulcrum is smoothly carried out.

[0021] These convex portion 102 and concave portion 103 are provided at the center of the short side of the rectangular shape in the main body portion 101. Each weight 100 having such a planar shape has the same planar shape, and the planar shape when turned over is also the same, and has a line-symmetric shape. For this reason, the plurality of weights 100 Thickness are stacked on the frame body 10 such that the stacking height of the weights 100 is substantially the same on the left and right around the support column 20, considering only different weights without considering the front and back or the mounting direction.

[0022] ≪Method for Assembling Counterweight≫ FIG. 2 and FIG. 3 are diagrams (Part 1) and (Part 2) showing the method for assembling the counterweight according to the embodiment, and show a plan sectional view (a) and a front view (b), respectively. Hereinafter, based on these figures, the procedure for attaching the weight 100 to the frame body 10 will be described as the method for assembling the counterweight. In FIGS. 2 and 3, only the longitudinal beams 11L and 11R of the frame body 10 are shown.

[0023] First, as shown in FIG. 2, among the plurality of weights 100, the weight 100 to be attached to the frame 10 hereafter is defined as weight 100a. In this case, the operator first lifts the weight 100a with the convex portion 102 side facing forward, and fits the concave portion 103 of the weight 100a with the support column 20 of the frame 10. Then, the end portion on the concave portion 103 side of the weight 100a is supported with respect to the support column 20 and the base material (here, another weight 100) located below the weight 100a. Note that when this weight 100a is the lowermost weight 100a to be attached to the frame 10, the base material is the lower beam 13 (see FIG. 1).

[0024] In this state, as shown by the arrow in the plan sectional view (a) of FIG. 2, the operator rotates the weight 100a about the support column 20 toward the longitudinal beam (which is the longitudinal beam 11R in the drawing plane, hereinafter referred to as the longitudinal beam 11R), and as shown by the arrow in the front view (b) of FIG. 2, lifts the convex portion 102 side of the weight 100a.

[0025] As a result, as shown in FIG. 3, the operator arranges the weight 100a between the support column 20 and the longitudinal beam 11R. In this state, as shown in the plan sectional view (a) of FIG. 3, the longitudinal direction of the rectangular shape of the main body portion 101 of the weight 100a is substantially parallel to the longitudinal direction of the rectangular shape of the main body portion 101 of the other weights 100 that have already been attached. This direction is also the extending direction of the upper beam 12 and the lower beam 13 (see FIG. 1). Further, as shown in the front view (b) of FIG. 3, the longitudinal direction of the rectangular shape of the main body portion 101 of the weight 100a is inclined with respect to the vertical direction.

[0026] In this state, as shown by the arrow in the front view (b) of FIG. 3, the operator lowers the convex portion 102 side of the weight 100a and fits the convex portion 102 into the longitudinal beam 11R made of channel steel. This operation is performed while the end portion on the concave portion 103 side of the weight 100a is supported with respect to the support column 20 and the other weights 100 located below the weight 100a.

[0027] As a result, the weight 100a is mounted on the frame body 10 in a state where the convex portion 102 is inserted into the vertical beam 11R and the concave portion 103 is fitted to the support column 20. Further, by repeating the above-described mounting procedure of the weight 100a alternately left and right until the total weight reaches a desired value, the stacking height of the weights 100 mounted on the left and right sides with the support column 20 sandwiched therebetween is adjusted to be approximately the same. Thereby, the counterweight 1 shown in FIG. 1 is completed.

[0028] When mounting the uppermost weight 100a, if the weight 100a interferes with the upper beam 12, the notch portions 11b provided in the vertical beams 11L and 11R (see FIG. 1) are used. In this case, the convex portion 102 of the weight 100a can be inserted into the vertical beams 11L and 11R by passing the convex portion 102 of the weight 100a through the notch portion 11b. After mounting the uppermost weight 100a, the notch portion 11b is closed with the lid 11c, and the lid 11c is fixed to the vertical beams 11L and 11R.

[0029] ≪Effects of the Embodiment≫ According to the embodiment described above, by erecting the support column 20 at the center of the frame body 10, when mounting the weight 100 on the frame body 10, first, by fitting the concave portion 103 of the weight 100 to the support column 20, one end side of the weight 100 can be aligned with the frame body 10. Further, since it is possible to rotate the convex portion 102 side of the weight 100 while supporting it in a state where the concave portion 103 of the weight 100 is fitted to the support column 20, it is possible to rotate only the convex portion 102 side of the weight 100 with about half the weight. Therefore, it is possible to facilitate the operation of rotating the convex portion 102 side of the weight 100 and inserting it into the vertical beams 11L and 11R and mounting the weight 100 on the frame body 10.

[0030] Note that the present invention is not limited to the above-described embodiment and modification examples, and further includes various modification examples. For example, the above-described embodiment has been described in detail for easy understanding of the present invention, and is not necessarily limited to the one having all the configurations described. Also, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Also, for a part of the configuration of each embodiment, it is possible to add, delete, or replace other configurations.

Explanation of Reference Numerals

[0031] 1... plumb bob 10... frame body 11b... notch 11L, 11R... longitudinal beam 12... upper beam 13... lower beam 20... support column 100, 100a... weight 102... convex part (fitting part) 103... concave part

Claims

1. A counterweight for balancing with a car, comprising a frame having a pair of vertical beams, an upper beam and a lower beam, a support column erected in the frame, having a recess fitting onto the support column and a fitting portion fitting onto one of the pair of vertical beams, and a plurality of weights mounted on the frame between the support column and one of the pair of vertical beams. A counterweight for an elevator.

2. Each weight is mounted on the frame with the recess fitting onto the support column and the fitting portion fitting onto one of the pair of vertical beams. The counterweight for an elevator according to Claim 1.

3. The support column is provided at an equal distance from the pair of vertical beams. The counterweight for an elevator according to Claim 1.

4. The support column and the pair of vertical beams are arranged on the same plane. The counterweight for an elevator according to Claim 1.

5. The support column has a cylindrical shape. The counterweight for an elevator according to Claim 1.

6. The inner wall of the recess in the support column has a semi-circular flat cross-section. The counterweight for an elevator according to Claim 5.

7. The pair of vertical beams are constituted by a pair of channel steels arranged with their openings facing each other, and the convex fitting portion of the weight is inserted therein. The counterweight for an elevator according to Claim 1.

8. The pair of vertical beams have cutout portions directly below the upper beam. The counterweight for an elevator according to Claim 7.

9. The plurality of weights have the same planar shape The counterweight of the elevator according to claim 1

10. A method for assembling a counterweight for balancing with a car, comprising: fitting a recess of a weight onto a support column erected in a frame having a pair of vertical beams, an upper beam, and a lower beam; rotating the weight with the recess fitted thereon about the support column, and fitting a fitting portion of the weight onto one of the pair of vertical beams to attach the weight to the frame; A method for assembling a counterweight

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