Scale tape and method for removing counterweight piece using scale tape

Abstract

To provide a scale tape for improving removal work efficiency by being stuck to a balance weight piece to display corresponding weight in work for removing the balance weight piece of an elevator from a weight frame.SOLUTION: The scale tape 30 has a scale displayed on the front surface and an adhesive layer provided on the back surface. The scale tape 30 has a weight scale 31 for displaying the weight corresponding to the weight piece thickness 51 of the balance weight piece 20 of the elevator at regular intervals as a scale.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a scale tape used in removing a counterweight piece from an elevator and a method for removing a counterweight piece using the scale tape. [Background technology]

[0002] In a typical traction elevator, the car and a weight frame carrying a counterweight are connected by wire ropes in the elevator shaft to maintain mass balance. Elevators with large car masses also require large vertical frame lengths for the weight frame.

[0003] Patent Document 1 discloses a weight piece provided with a weight frame reinforcing member for preventing the balancing weight piece from falling off the weight frame when the weight frame is deformed due to a load caused by an earthquake or the like. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2020-109038 Summary of the Invention [Problem to be solved by the invention]

[0005] The weight frame reinforcing member of the above-mentioned conventional technology is preferably installed around the middle part of the weight frame in the height direction to prevent deformation of the weight frame, and in order to apply it to an existing weight frame with a large vertical frame length dimension, it may be necessary to remove several dozen existing balancing weight pieces from the top.

[0006] When removing counterweight pieces, it is common to calculate the weight to be removed, convert it into the number of counterweight pieces, and then instruct workers on how many to remove. However, removing dozens of counterweight pieces in a hoistway with minimal lighting is extremely difficult, and there is also a risk of making a mistake in the number of counterweight pieces to remove. [Means for solving the problem]

[0007] The scale tape according to the present invention is characterized in that it has a scale displayed on its surface, an adhesive layer on its back, and a weight scale that displays the weight corresponding to the thickness width of the counterweight piece of the elevator at regular intervals.

[0008] The method for removing counterweight pieces using a scale tape according to the present invention is characterized by comprising the steps of: calculating the weight and / or number of counterweight pieces to be removed; measuring the width of the counterweight pieces; selecting a weight scale corresponding to the measured width of the counterweight pieces; aligning the zero point of the weight scale on the scale tape with the measurement start point of the counterweight pieces; and attaching the weight scale on the scale tape to the counterweight pieces; marking a lower limit removal position based on the weight scale and / or number indication on the scale tape attached to the counterweight pieces; and removing the counterweight pieces up to the marked position based on the weight scale and / or number indication on the scale tape. [Effects of the Invention]

[0009] The scale tape according to the present invention, when applied to the counterweight piece, allows the weight corresponding to the counterweight piece thickness width to be visually confirmed. This allows the lower limit position of the counterweight piece to be removed to be visually grasped, and eliminates the need for workers to count the number of counterweight pieces during removal work, which is expected to improve construction efficiency. [Brief explanation of the drawings]

[0010] [Figure 1]FIG. 2 is a diagram illustrating a schematic configuration for explaining an elevator mechanism. [Figure 2] FIG. 1 is a perspective view illustrating a usage pattern of a scale tape according to an embodiment. [Figure 3] FIG. 2 is an enlarged perspective view illustrating the weight scale of the scale tape according to an embodiment. [Figure 4] FIG. 2 is an enlarged perspective view illustrating the weight scale of the scale tape according to an embodiment. [Figure 5] 10 is a flow chart showing the procedure for removing a counterweight piece from a weight frame using a scale tape, which is an example of an embodiment. FIG. [Figure 6] FIG. 10 is a perspective view illustrating length scales of a scale tape that is another example of an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Note that the embodiments described below are merely examples, and the present invention is not limited to the following embodiments. Figure 1 is a diagram showing a schematic configuration for explaining an elevator mechanism.

[0012] As shown in Figure 1, a car 1 and a weight frame 2 loaded with a counterweight piece 20 (described later in Figure 2) are installed in a bucket-like fashion in an elevator hoistway 10, each connected to both ends of a main rope 3. The main rope 3 is wound around a hoisting machine 5 and a deflector sheave 6 installed in a machine room 4 provided above the hoistway 10, and the car 1 and weight frame 2 move up and down relative to each other in the hoistway 10 as the hoisting machine 5 winds up or pays out the main rope 3.

[0013] Next, the usage and weight scale of the scale tape 30 according to the present invention will be described with reference to Figures 2 to 4. Figure 2 is a perspective view illustrating the usage of the scale tape, which is one example of an embodiment. Figures 3 and 4 are enlarged perspective views illustrating the weight scale of the scale tape, which is one example of an embodiment.

[0014] As shown in Figure 2, the weight frame 2 is a frame for loading multiple counterweight pieces 20, and is made of, for example, an alloy whose main component is iron. One end of a main rope 3 is connected to the top of the weight frame 2. The frame width 21 of the weight frame 2 is generally standardized into three types: 900 mm, 1200 mm, and 1500 mm.

[0015] The counterweight pieces 20 are a plurality of flat weights designed to be removable from the weight frame 2. The counterweight pieces 20 are made of, for example, castings, steel plates, concrete, etc., and each weighs approximately 10 kg to 20 kg. The length of the counterweight pieces 20 in the depth direction is called the counterweight piece width 50, and a width of 180 mm or 210 mm is generally adopted. In order to balance with the car 1 (see Figure 1), the total weight of the weight frame 2 and the counterweight pieces 20 loaded in the weight frame 2 is designed to be the sum of the weight of the car 1 and the weight obtained by multiplying the rated load capacity by half. Depending on the weight of the car 1, several tens of counterweight pieces 20 may be required, and the height of the weight frame 2 in which they are loaded may reach several meters.

[0016] The scale tape 30 has a scale displayed on its surface and an adhesive layer on its backside. As shown in FIG. 2, it is attached to the top and front side of the counterweight piece 20 when it is loaded into the weight frame 2. Specifically, the scale tape 30 is composed of a base layer and an adhesive layer, with the scale displayed on one side of the base layer and the adhesive layer formed on the other side of the base layer. The adhesive layer is not particularly limited as long as it adheres well to the adherend at room temperature and can be peeled off from the adherend without leaving any adhesive residue. For example, a slightly adhesive adhesive layer that exhibits slight adhesion may be used. The material of the scale tape 30 is not particularly limited, but a paper or film material that can be appropriately cut along the perforations 40 described later in FIG. 3 is preferred.

[0017] 3, the scale tape 30 has multiple weight scales 31 corresponding to the types of weight piece widths 50 of the counterweight pieces 20. The weight scales 31 are scales displayed on one side of the base layer (the side opposite to the side on which the adhesive layer is disposed) and display weights corresponding to weight piece thicknesses 51 of the multiple counterweight pieces 20 at regular intervals. The weight piece thickness 51 refers to the thickness from the front corner 20A, which is the measurement start point for the counterweight piece 20, to the bottom end of a given counterweight piece 20.

[0018] For example, when there are two types of weight scales 50 of the counterweight pieces 20, 180 mm and 210 mm, the scale tape 30 has two types of weight scales 31, weight scale 31-1 and weight scale 31-2. Weight scale 31-1 and weight scale 31-2 indicate the weight corresponding to the weight scale thickness 51 of the counterweight piece 20 of each weight scale width 50. In other words, one scale tape 30 can be used to indicate the weight of two types of counterweight pieces 20 with different weight scale widths 50.

[0019] Specifically, a weight scale 31-1 corresponding to 180 mm, which is the first weight piece width 50 of the counterweight piece 20, is displayed on one widthwise end (left side) of the scale tape 30, and a weight scale 31-2 corresponding to 210 mm, which is the second weight piece width 50, is displayed on the right side. Since the scale tape 30 has two types of weight scales 31-1 and 31-2, one scale tape 30 can be used to display the weights of counterweight pieces 20 having two different types of weight piece widths 50.

[0020] 3, the scale tape 30 has a reference line 32 that serves as a reference for measuring the weight piece width 50, and the reference line 32 is the end of the scale tape 30. The weight piece width 50 of the counterweight piece 20 corresponds to the length from the rear corner 20B to the front corner 20A of the counterweight piece 20.

[0021] In the scale tape 30 of this embodiment, when the weight piece width 50 is 180 mm, the zero point 33-1, which is the zero point of the weight scale 31-1, is set to coincide with the front corner 20A of the counterweight piece 20. Similarly, when the weight piece width 50 is 210 mm, the zero point 33-2, which is the zero point of the weight scale 31-2 described later in FIG. 4, is set to coincide with the front corner 20A of the counterweight piece 20 (see FIG. 4). In other words, the zero points 33-1 and 33-2 are positioned apart in the longitudinal direction of the scale tape 30 by the difference in length of the weight piece width 50.

[0022] When measuring the weight piece width 50 of the counterweight piece 20, the reference line 32 of the scale tape 30 is aligned with the rear corner 20B of the counterweight piece 20, and then the scale tape 30 is attached to the top surface of the counterweight piece 20 from the rear corner 20B toward the front corner 20A. Specifically, when the reference line 32 is aligned with the rear corner 20B and the front corner 20A coincides with the zero point 33-1, which is the zero point of the weight scale 31-1 on the scale tape 30 attached to the top surface of the counterweight piece 20, the weight piece width 50 is 180 mm. Similarly, when the reference line 32 is aligned with the rear corner 20B and the front corner 20A coincides with the zero point 33-2, which is the zero point of the weight scale 31-2 on the scale tape 30 attached to the top surface of the counterweight piece 20, the weight piece width 50 is 210 mm.

[0023] Because frame width 21 of weight frame 2 (see Figure 2) is the external appearance of weight frame 2, it is relatively easy to determine whether it is 900 mm, 1200 mm, or 1500 mm, but weight piece width 50 of counterweight piece 20 is the length in the depth direction of counterweight piece 20, and it is difficult to distinguish between 180 mm and 210 mm by visual inspection alone within hoistway 10. Furthermore, weight piece width 50 of counterweight piece 20 can be measured using a measuring device such as a convex, but by using scale tape 30 having reference line 32 at its end and zero point 33 at a position spaced from reference line 32 by the length of weight piece width 50, it is possible to measure weight piece width 50 using scale tape 30 alone, without the need for a separate measuring tool.

[0024] Furthermore, since the zero point 33 of the weight scale 31 on the scale tape 30 is set to coincide with the front corner 20A, after measuring the weight piece width 50, it is possible to match the zero point 33 of the weight scale 31 with the measurement starting point of the balancing weight piece 20, and to visually check the weight corresponding to the weight piece thickness 51 of the balancing weight piece 20.

[0025] When using the weight scale 31 of the scale tape 30 of this embodiment, the weight scale 31 corresponding to the weight piece width 50 of the measured counterweight piece 20 is selected from the multiple weight scales 31. Specifically, if the weight piece width 50 is 180 mm, the weight scale 31-1 corresponding to the weight piece width 50 of 180 mm is selected. If the weight piece width 50 is 210 mm, the weight scale 31-2 corresponding to the weight piece width 50 of 210 mm is selected.

[0026] 3, if the weight of one counterweight piece 20 having a counterweight piece width 50 of 180 mm is, for example, X kg, calculated from the unit mass of the material and the outer shape of the counterweight piece 20, the weight scale 31-1 will indicate "10X kg," which is the weight corresponding to the counterweight piece thickness 51-1, at the bottom end of the 10th counterweight piece 20 counting from the front corner 20A, which is the measurement start point of the counterweight piece 20. Similarly, the weight scale 31-1 will indicate "11X kg," which is the weight corresponding to the counterweight piece thickness 51-2, at the bottom end of the 11th counterweight piece 20 counting from the front corner 20A, and will indicate "15X kg," which is the weight corresponding to the counterweight piece thickness 51-3, at the bottom end of the 15th counterweight piece 20 counting from the front corner 20A.

[0027] The weight scale 31 displays the weight corresponding to the weight piece thickness 51 of the multiple balancing weight pieces 20 at regular intervals. In Figure 3, it is provided for each balancing weight piece 20, but this interval can be arbitrary, and it may be provided, for example, every five pieces.

[0028] The weight scale 31 of the scale tape 30 further displays the number of counterweight pieces 20 corresponding to the weight of the counterweight pieces 20. Specifically, as shown in Fig. 3, the weight scale 31-1 corresponding to the bottom ends of the 10th counterweight piece 20 counting from the front corner 20A displays "10 pieces" in addition to "10X kg," which indicates the number of pieces corresponding to the total weight of the plurality of counterweight pieces 20. Similarly, the weight scale 31-1 corresponding to the bottom ends of the 11th counterweight piece 20 counting from the front corner 20A displays "11 pieces" in addition to "11X kg," and the weight scale 31-1 corresponding to the bottom ends of the 15th counterweight piece 20 counting from the front corner 20A displays "15 pieces" in addition to "15X kg." In the work of removing the counterweight pieces 20, the weight to be removed is generally converted into a number and the number of counterweight pieces 20 to be removed is indicated, so the number display corresponds to this.

[0029] When the weight piece width 50 is 210 mm, as shown in Figure 4, the zero point 33-2 of the weight scale 31-2 is set to coincide with the front corner 20A of the counterweight piece 20. If the weight of one counterweight piece 20 having a weight piece width 50 of 210 mm is, for example, Y kg, calculated from the unit mass of the material and the outer shape of the counterweight piece 20, the weight scale 31-2 will be aligned with the bottom end of the 10th counterweight piece 20 counting from the front corner 20A, which is the measurement starting point for the counterweight piece 20, and will display "10Y kg," which is the weight corresponding to the weight piece thickness 51-4. Similarly, the weight scale 31-2 indicates "11Y kg," which is the weight corresponding to the weight piece thickness 51-5, at the bottom end of the eleventh counterweight piece 20 counting from the front corner 20A, and "15Y kg," which is the weight corresponding to the weight piece thickness 51-6, at the bottom end of the fifteenth counterweight piece 20 counting from the front corner 20A. Similarly, the number indication on the weight scale 31-2 also indicates, in addition to "10Y kg," the number corresponding to the total weight of the multiple counterweight pieces 20, such as "10 pieces."

[0030] 3 and 4, the scale tape 30 has perforations 40 at predetermined intervals for cutting at the required position. Specifically, the perforations 40 are provided at the same positions as the weight scale 31.

[0031] When removing the counterweight piece 20 from the weight frame 2, the counterweight piece 20 may be marked with a paint marker or the like based on the weight scale 31 corresponding to the weight or number of pieces instructed to be removed, or the portion below the perforation 40 that matches the weight scale 31 corresponding to the weight or number of pieces instructed to be removed may be cut off and collected, and the lower limit removal position may be marked so that it can be visually confirmed.

[0032] After marking the lower limit removal position, when removing the counterweight piece 20 to which the scale tape 30 is stuck from the weight frame 2, the scale tape 30 can be appropriately cut off along perforations 40 provided at predetermined intervals and collected together with the counterweight piece 20, thereby collecting the scale tape 30 as well.

[0033] When removing the counterweight piece 20 from the weight frame 2, the portion above the perforation 40 that coincides with the weight scale 31 corresponding to the weight or number of pieces instructed to be removed can be cut off and collected, and the portion below the perforation 40 can be attached to the counterweight piece 20 to mark the lower limit removal position so that it can be visually confirmed.

[0034] After marking the lower limit removal position, when removing the counterweight piece 20 from the weight frame 2, it is only necessary to remove the counterweight piece 20 up to the marked position, and there is no need to cut off the scale tape 30 at the perforations 40 and collect it together with the counterweight piece 20, so that the removal work can be carried out more easily.

[0035] Next, a method for removing the counterweight piece 20 using the scale tape 30 will be described with reference to Fig. 5. Fig. 5 is a flow chart showing the procedure for removing the counterweight piece from the weight frame using the scale tape, which is one example of an embodiment.

[0036] As shown in FIG. 5, the method for removing the counterweight piece 20 using the scale tape 30 includes the following steps. (1) A step of calculating the weight and / or number of counterweight pieces 20 to be removed. (2) Measuring the weight piece width 50 of the counterweight piece 20. (3) A process of selecting a weight scale corresponding to the weight piece width 50 of the measured counterweight piece 20, aligning the zero point 33 of the weight scale 31 on the scale tape 30 with the measurement starting point of the counterweight piece 20, and attaching the weight scale 31 on the scale tape 30 to the counterweight piece 20. (4) A step of marking the lower limit of removal based on the weight scale 31 and / or the number indication on the scale tape 30 attached to the counterweight piece 20. (5) Removing the counterweight piece 20 to the position marked based on the weight scale 31 and / or the number markings on the scale tape 30.

[0037] Specifically, first, the weight of the counterweight pieces 20 to be removed is calculated (S81). In this case, the weight may be calculated from the unit mass of the material of the counterweight pieces 20 and the outer shape of the counterweight pieces 20, and converted into the number of counterweight pieces 20 to be removed.

[0038] Next, the weight piece width 50 of the counterweight piece 20 is measured (S82). Specifically, after aligning the reference line 32 provided at the end of the scale tape 30 with the rear corner 20B of the counterweight piece 20, the scale tape 30 is attached to the top surface of the counterweight piece 20, and the weight piece width 50, which is the length from the rear corner 20B to the front corner 20A, is measured (see FIG. 3).

[0039] Next, the weight scale 31 corresponding to the weight piece width 50 measured in S82 is selected, the zero point 33 of the weight scale 31 is aligned with the measurement start point of the counterweight piece 20, and the weight scale 31 of the scale tape 30 is affixed to the front side of the counterweight piece 20 (S83). When the reference line 32 provided at the end of the scale tape 30 is aligned with the rear corner 20B of the counterweight piece 20 and then the scale tape is affixed up to the front corner 20A, the front corner 20A, which is the measurement start point of the counterweight piece 20, coincides with the zero point 33 of the weight scale 31, and therefore the alignment of the zero point 33 of the weight scale 31 with the measurement start point of the counterweight piece 20 is also completed when the step (S82) of measuring the weight piece width 50 of the counterweight piece 20 is completed.

[0040] Next, based on the weight scale 31 on the scale tape 30 affixed to the front side surface of the counterweight piece 20, the lower limit removal position is marked at the scale position corresponding to the weight to be removed calculated in S81 (S84). The marking method may be to mark the counterweight piece 20 with a paint marker or the like, or to cut off the portion below the perforation 40 of the weight scale 31 corresponding to the weight or number of pieces instructed to be removed, or to cut off the portion above the perforation 40 of the weight scale 31 corresponding to the weight or number of pieces instructed to be removed.

[0041] The counterweight piece 20 is removed up to the position marked in S84, and the removal of the counterweight piece 20 is completed. If the portion above the perforation 40 corresponding to the weight scale 31 corresponding to the weight or number of pieces instructed to be removed is cut off, after removing the counterweight piece 20, the scale tape 30 remaining below the perforation 40 is collected, and the removal of the counterweight piece 20 is completed (S85).

[0042] As described above, by using the scale tape 30 having the above configuration, it is possible to visually recognize the weight corresponding to the weight piece thickness 51 of the plurality of counterweight pieces 20. Until now, workers were instructed to remove the number of counterweight pieces 20 by the number of counterweight pieces 20, but now they can visually grasp the lowest position of the counterweight pieces 20 to be removed, which eliminates the need to count the number of counterweight pieces 20 to be removed while working, and allows them to concentrate on the removal work, thereby contributing to improved work efficiency.

[0043] The above-described embodiment can be modified as needed without impairing the object of the present invention. For example, as shown in FIG. 6, the scale tape 30 has a weight scale 31 on one side and a length scale 34 on the other side, with a reference line 32 as the boundary. The length scale 34 is a scale that can measure a weight piece width 50 that distinguishes between multiple types of counterweight pieces 20. The weight piece width 50 of the counterweight piece 20 corresponds to the length from the reference line 32 to the length scale 34. Specifically, the length from the reference line 32 to the length scale 34-1 corresponds to the shorter weight piece width 50 (e.g., 180 mm), and as shown in FIG. 6, the length from the same reference line 32 to the length scale 34-2 corresponds to the longer weight piece width 50 (e.g., 210 mm).

[0044] There are multiple zero points 33 on the weight scale 31 on the scale tape 30 that are to be aligned with the front corner 20A, which is the measurement start point of the counterweight piece 20, depending on the type of weight piece width 50, but all zero points 33 on the weight scale 31 in this embodiment are displayed so as to coincide with the reference line 32. Specifically, when there are two types of weight piece width 50, 180 mm and 210 mm, there are two types of zero points 33 on the scale tape 30: zero point 33-1 on the weight scale 31-1 for the weight piece width 50 of 180 mm, and zero point 33-2 on the weight scale 31-2 for the weight piece width 50 of 210 mm, but as shown in FIG. 6, zero points 33-1 and 33-2 are displayed in the same position as the reference line 32.

[0045] When measuring the weight piece width 50 using the length scale 34 of the scale tape 30, the tape is arranged so that the length scale 34 is displayed on the upper portion and the weight scale 31 is displayed on the lower portion, with the reference line 32 as the boundary, and the reference line 32 is aligned with the front corner 20A of the counterweight piece 20. Next, the length scale 34 of the scale tape 30 is attached to the top surface of the counterweight piece 20, and the weight piece width 50, which is the length from the front corner 20A to the rear corner 20B, is measured based on the length scale 34.

[0046] When using the weight scale 31 on the scale tape 30, after measuring the weight piece width 50 using the length scale 34, the tape is bent downward at the front corner 20A and the weight scale 31 on the scale tape 30 is affixed to the front side of the counterweight piece 20. At this time, from among the multiple weight scales 31, the weight scale 31 corresponding to the measured weight piece width 50 of the counterweight piece 20 is selected. Specifically, if the weight piece width 50 is the length from the reference line 32 to the length scale 34-1, i.e., 180 mm, the weight scale 31-1 corresponding to the weight piece width 50 of 180 mm is selected. As shown in FIG. 6, if the weight piece width 50 is the length from the reference line 32 to the length scale 34-2, i.e., 210 mm, the weight scale 31-2 corresponding to the weight piece width 50 of 210 mm is selected.

[0047] As another variation, the scale tape 30 may have weight scales 31 corresponding to the frame width 21 (see FIG. 2) of the weight frame 2 written on one type of scale tape 30. In this case, one scale tape 30 bearing weight scales 31 corresponding to the three standardized frame widths 21 of the weight frame 2 and two standardized weight piece widths 50 can accommodate six types of counterweight pieces 20. [Explanation of symbols]

[0048] 1 car, 2 weight frame, 3 main rope, 4 machine room, 5 hoist, 6 deflector wheel, 10 elevator shaft, 20 balancing weight piece, 20A front corner, 20B rear corner, 21 frame width, 30 scale tape, 31 weight scale, 32 reference line, 33 zero point, 34 length scale, 40 perforation, 50 weight piece width, 51 weight piece thickness,

Claims

1. A scale tape having a scale displayed on the surface and an adhesive layer on the back surface, The scale tape has a weight scale that displays weights corresponding to the thickness of the counterweight piece of the elevator at regular intervals.

2. 2. The scale tape according to claim 1, further comprising length scales for measuring widths of the counterweight pieces to identify the different types of counterweight pieces.

3. The scale tape according to claim 1 , wherein the scale further indicates a number corresponding to the weight of the counterweight piece.

4. 2. The scale tape according to claim 1, wherein perforations are provided at predetermined intervals for cutting at required positions.

5. A method for removing the counterweight piece using the scale tape according to any one of claims 1 to 4, comprising the steps of: calculating the weight and / or number of the counterweight pieces to be removed; measuring a weight piece width of the counterweight piece; a step of selecting a weight scale corresponding to the width of the measured counterweight piece, aligning the zero point of the weight scale on the scale tape with the measurement start point of the counterweight piece, and attaching the weight scale on the scale tape to the counterweight piece; marking a lower limit of removal based on the weight scale and / or the number indication on the scale tape attached to the counterweight piece; removing the counterweight piece to a position marked based on the weight scale and / or the number indication on the scale tape; A method for removing a counterweight piece, including:

Images