Pulley alignment measuring tool and pulley alignment measuring method

Abstract

The present invention provides a measuring tool whereby the pulley alignment of a driven pulley used in an opening / closing mechanism for opening / closing a door of an elevator can be measured easily from the landing side.　The driven pulley is attached to a flat surface part of a mounting bracket fixed parallel to the back surface of a door frame of the elevator. The pulley alignment measuring tool comprises: a main body having a base part with a bottom surface that contacts the flat surface part of the mounting bracket to which the driven pulley is attached, a pillar part of which a base-end side is connected to the base part and of which a leading-end side extends perpendicularly to the bottom surface, and a groove hole that penetrates the interior of the pillar part such that the penetration direction is perpendicular to the bottom surface; and a steel rule slidably inserted into the groove hole and having an end part protruding from the bottom surface and contacting the back surface.

Description

Pulley alignment measurement tool and pulley alignment measurement method

[0001] The present disclosure relates to a technique for a pulley alignment measuring tool that measures the pulley alignment of a driven pulley used in an opening and closing mechanism that opens and closes elevator doors.

[0002] Patent Document 1 discloses a technology related to an elevator door device in which a belt wound around a pulley body is connected to the door body. This door device is equipped with a structure that, when the driven pulley tilts due to a misalignment of the belt, generates a moment that tilts the driven pulley in the opposite direction using the steering principle of railway wheels, thereby automatically adjusting the misalignment of the belt.

[0003] International Publication No. 2016 / 030996

[0004] During elevator door maintenance and inspection work, the pulley alignment of the elevator door's driven pulley may need to be measured. Due to the structure of the elevator door's driven pulley, it is difficult to secure a working space from the landing side. While the pulley alignment can be easily measured by having a worker board the car, some maintenance and inspection work, such as belt tension inspection, must be performed from the landing side, resulting in poor work efficiency. The technology in Patent Document 1 does not disclose an effective means for measuring the pulley alignment of the driven pulley from the landing side.

[0005] The present disclosure has been made to solve the above-mentioned problems, and aims to provide a measuring tool that can easily measure the pulley alignment of a driven pulley used in an opening and closing mechanism that opens and closes elevator doors from the landing side.

[0006] The present disclosure relates to a pulley alignment measuring tool for a driven pulley used in an opening and closing mechanism for opening and closing elevator doors, wherein the driven pulley is attached to a flat portion of a mounting bracket fixed parallel to the back surface of the elevator door frame, and the pulley alignment measuring tool comprises: a base portion having a bottom surface that contacts the flat portion of the mounting bracket; a column portion whose base end is connected to the base portion and whose tip end extends perpendicular to the bottom surface; a main body portion having a slot that penetrates the interior of the column portion and whose penetration direction is perpendicular to the bottom surface; and a steel ruler having a scale on one surface, which is slidably inserted into the slot and whose end protrudes from the bottom surface to contact the back surface.

[0007] The present disclosure also provides a pulley alignment measurement method for measuring the pulley alignment of a driven pulley from the landing side of an elevator using the pulley alignment measurement tool described above, the method including: a first installation step of installing the pulley alignment measurement tool from the landing side at a first position where the bottom surface of the base part is in contact with the surface side of the flat part of the mounting bracket and the measuring ruler is outside the left end of the flat part; a first measurement step of sliding the measuring ruler at the first position until the end of the measuring ruler comes into contact with the back surface of the door frame and measuring from the landing side as a first distance the value of the scale at the position where the measuring ruler protrudes from the main body part; a second installation step of installing the pulley alignment measuring tool from the landing side at a second position where the steel ruler comes into contact with the surface side of the door frame and is located outside the right end of the flat portion; a second measurement step of sliding the steel ruler at the second position until the end of the steel ruler comes into contact with the back surface of the door frame and measuring the value on the scale where the steel ruler protrudes from the main body as the second distance from the landing side; and an evaluation step of evaluating whether the pulley alignment of the driven pulley is within a normal range based on whether the difference between the first distance measured in the first measurement step and the second distance measured in the second measurement step is equal to or less than a predetermined reference value.

[0008] The measuring tool of the present disclosure makes it possible to easily measure the pulley alignment of a driven pulley used in an opening and closing mechanism that opens and closes elevator doors from the landing side.

[0009] FIG. 3 is a front view of an elevator door control device in an embodiment. FIG. 4 is a front view for explaining the configuration of a pulley alignment measurement tool. FIG. 5 is a plan view of the pulley alignment measurement tool shown in FIG. 2, seen from direction A. FIG. 6 is a side view of the pulley alignment measurement tool shown in FIG. 2, seen from direction B. FIG. 7 is a diagram for explaining a first installation step of the pulley alignment measurement tool in alignment measurement work. FIG. 8 is a diagram for explaining a first measurement step in alignment measurement work using the pulley alignment measurement tool. FIG. 9 is a diagram for explaining a first measurement step in alignment measurement work using the pulley alignment measurement tool. FIG. 10 is a diagram for explaining a second installation step of the pulley alignment measurement tool in alignment measurement work. FIG. 11 is a diagram showing an example in which a pulley alignment measurement tool is used with a modified driven pulley installation structure. FIG. 12 is a diagram for explaining a modified pulley alignment measurement tool.

[0010] Hereinafter, an embodiment will be described with reference to the drawings. Note that elements common to the various drawings are given the same reference numerals and redundant explanations will be omitted.

[0011] 1-1. Configuration of an elevator door device according to an embodiment Fig. 1 is a front view of an elevator door control device according to an embodiment. An elevator shaft is formed so as to pass through each floor of a building. At each floor, a landing is formed near the shaft. A passenger car is provided within the shaft. A landing entrance is formed between each landing and the shaft. A landing door is provided at the landing entrance. A car entrance is formed on the landing side of the passenger car. A door device 1 is provided at the car entrance. The door device 1 has a door 2 and an opening / closing mechanism 3 that opens and closes the door 2.

[0012] The doors 2 are provided to open and close the car entrance. Typically, the doors 2 are provided in pairs so as to open from the center. As another example, the doors 2 may be provided so as to open on one side.

[0013] A door frame 5 is fixed to the top of the car entrance. Various components of the opening / closing mechanism 3 are installed in the door frame. The opening / closing mechanism 3 mainly comprises a suspension member 6, a hanger roller 7, a rail 8, a drive pulley 9, a driven pulley 10, a belt 11, a connecting member 12, and a door motor 13. The suspension member 6 is fixed to the top of the door 2. The hanger roller 7 is installed on the top of the suspension member 6. The rail 8 is installed on the door frame 5 above the door 2. The drive pulley 9 is installed on one end of the door frame 5 in the longitudinal direction. In addition, the door frame 5 is provided with a door motor 13 that rotates the drive pulley 9.

[0014] The driven pulley 10 is installed at the other longitudinal end of the door frame 5 using a mounting bracket 14. The mounting bracket 14 is a bracket for installing the driven pulley 10 on the door frame 5. The driven pulley 10 is rotatably fixed to the back side of the flat surface portion 141 so that its rotation axis is perpendicular to the flat surface portion 141. The mounting bracket 14 is fixed in a position where the flat surface portion 141 is parallel to the back surface 51 of the door frame 5 with a predetermined gap between them. As a result, the rotation axis of the driven pulley 10 is perpendicular to the back surface 51 of the door frame 5.

[0015] The belt 11 is installed so as to go around the driving pulley 9 and the driven pulley 10. One end of one of the connecting members 12 is fixed to an upper portion of the belt 11. The other end of one of the connecting members 12 is fixed to one of the suspension members 6. The other end of the connecting member 12 is fixed to a lower portion of the belt 11. The other end of the connecting member 12 is fixed to the other of the suspension members 6.

[0016] In such an elevator, when the passenger car is positioned adjacent to a landing, a portion of the passenger car door 2 and a portion of the landing door mesh with each other. In this state, the door motor 13 is driven. This drive rotates the drive pulley 9 and the driven pulley 10. This rotation causes the belt 11 to move. At this time, the upper side of the belt 11 moves to one side, left or right. Conversely, the lower side of the belt 11 moves to the other side, left or right.

[0017] Accompanying this movement, the connecting members 12 move in opposite directions. Accompanying this movement, the suspension members 6 move in opposite directions. Accompanying this movement, the doors 2 move in opposite directions. At this time, the hanger rollers 7 run on the rails 8. As a result, the doors 2 smoothly open and close the car entrance. Accompanying this opening and closing, the pair of landing doors move in opposite directions. Due to this movement, the landing doors open and close the landing entrance.

[0018] 2. Configuration of the Pulley Alignment Measuring Tool in the Embodiment When a worker performs elevator maintenance work, the worker may need to measure the alignment of the driven pulley 10. When measuring the alignment of the driven pulley 10, it is difficult to secure a working space from the landing side, which may reduce work efficiency and increase the burden on the worker.

[0019] The pulley alignment measurement tool of this embodiment is a measurement tool used when measuring pulley alignment from the landing side. Fig. 2 is a front view for explaining the configuration of the pulley alignment measurement tool. Fig. 3 is a plan view of the pulley alignment measurement tool shown in Fig. 2 as seen from direction A. Fig. 4 is a side view of the pulley alignment measurement tool shown in Fig. 2 as seen from direction B. The pulley alignment measurement tool 100 shown in these figures includes a main body 20 and a steel ruler 40.

[0020] The main body 20 is an L-shaped structure having a base 22 and a column 24 extending perpendicular to the base 22. The base 22 has a rectangular column shape with the X direction in the figure as its longitudinal direction. The bottom surface 221 of the base 22 is a flat surface that contacts the object to be measured. Two recesses are formed on the top surface of the base 22 along the longitudinal direction, and rectangular column-shaped magnetic bodies 26 are embedded in each of these recesses. The magnetic bodies 26 attract the object to be measured by their attractive force, thereby magnetically attaching the bottom surface 221 to the object to be measured.

[0021] The column 24 is a rectangular column structure whose base end is connected to one longitudinal end of the base 22 and whose tip end extends in the Z direction in the figure. The width dimension of the column 24 in the Y direction is the same as the width dimension of the base 22. A slot 30 is formed in the column 24, penetrating the interior in a direction perpendicular to the bottom surface 221 of the base 22. The longitudinal direction of the slot 30 is the Y direction, and the size is set so that a steel ruler 40 can be inserted into it.

[0022] The steel ruler 40 is a steel ruler. The steel ruler 40 is slidably inserted into the slot 30 so that the surface with the graduations faces the -X direction and the zero point side of the scale faces the -Z direction. A recess is formed in the column 24, running from the top surface to the slot 30 at a position close to the slot 30, and a rectangular column-shaped magnetic body 28 is embedded in this recess. The magnetic body 28 attracts the steel ruler 40 by its attractive force, thereby maintaining the position of the steel ruler 40.

[0023] Furthermore, a column-side cutout 32 is formed on the top surface of the column 24, cut out toward the scale of the steel rule 40. The column-side cutout 32 is intended to make the scale of the steel rule 40 easier to read.

[0024] 3. Method for Measuring Pulley Alignment of a Driven Pulley Using a Pulley Alignment Measuring Tool In the alignment measurement process, the distance between the flat surface 141 and the back surface 51 of the door frame 5 is measured at each of the left and right ends of the mounting bracket 14 to which the driven pulley 10 is attached, and the presence or absence of an alignment defect is confirmed based on whether the difference is within a specified range. The alignment measurement process is performed from the elevator landing side using a pulley alignment measuring tool 100. The procedure for measuring the alignment of the driven pulley 10 using the pulley alignment measuring tool 100 will be described in detail below.

[0025] 5 is a diagram illustrating the first installation step of the pulley alignment measurement tool in alignment measurement work. In the first installation step, a worker reaches out from the elevator landing side to the mounting bracket 14 to install the pulley alignment measurement tool 100. Specifically, the worker installs the pulley alignment measurement tool 100 at a first position where the bottom surface 221 of the base portion 22 contacts the surface side of the flat portion 141 of the mounting bracket 14 and the steel ruler 40 is located outside the left end portion 142 of the flat portion 141. As a result, the pulley alignment measurement tool 100 is magnetically attached to the flat portion 141 by the attractive force of the magnetic body 26.

[0026] 6, 7, and 8 are diagrams illustrating the first measurement step in alignment measurement work using a pulley alignment measurement tool. In the first measurement step, the worker slides the steel rule 40 inserted into the main body 20 installed in the first position until the end of the steel rule 40 contacts the back surface 51 of the door frame 5. Next, the worker removes the pulley alignment measurement tool 100 from the flat surface 141 and reads the scale at the position where the steel rule 40 protrudes from the bottom surface 221. This allows the pulley alignment measurement tool 100 to measure the first distance H1 between the left end 142 of the flat surface 141 and the back surface 51 of the door frame 5.

[0027] 3-3. Second Installation Step of the Pulley Alignment Measurement Tool Figure 9 is a diagram for explaining the second installation step of the pulley alignment measurement tool in the alignment measurement work. In the second installation step, as in the first installation step, the worker reaches out from the elevator landing side to the mounting bracket 14 to install the pulley alignment measurement tool 100. Specifically, the worker installs the pulley alignment measurement tool 100 at a second position where the bottom surface 221 of the base portion 22 contacts the surface side of the flat portion 141 of the mounting bracket 14 and the steel ruler 40 is located outside the right end portion 143 of the flat portion 141. As a result, the pulley alignment measurement tool 100 is magnetically attracted to the flat portion 141 by the attractive force of the magnetic body 26.

[0028] 3-4. Second Measurement Step In the second measurement step, the worker performs the same procedure as in the first measurement step to slide the steel rule 40 inserted into the main body 20 installed in the second position until the end of the steel rule 40 contacts the back surface 51 of the door frame 5. Next, the worker removes the pulley alignment measuring tool 100 from the flat surface 141 and reads the scale at the position where the steel rule 40 protrudes from the bottom surface 221. In this way, the second distance H2 between the right end 143 of the flat surface 141 and the back surface 51 of the door frame 5 is measured.

[0029] 3-5. Alignment Evaluation Process The worker determines whether the difference value ΔH between the first distance H1 measured in the first measurement process and the second distance H2 measured in the second measurement process is equal to or less than a predetermined reference value R. Here, the reference value R is, for example, 0.5 mm. As a result, if ΔH≦R, the pulley alignment is evaluated to be within the normal range, and if ΔH>R, the pulley alignment is evaluated to be within the abnormal range.

[0030] 4. Functions and Effects of the Pulley Alignment Measuring Tool The pulley alignment measuring tool described above provides the following functions and effects.

[0031] By using the pulley alignment measuring tool 100, a worker can measure the pulley alignment from the elevator hall side, thereby improving the efficiency of maintenance and inspection work.

[0032] The pulley alignment measurement tool 100 includes a magnetic body 26. This allows the bottom surface 221 of the pulley alignment measurement tool 100 to be magnetically attached to the flat portion 141, thereby improving work efficiency during measurement.

[0033] The pulley alignment measuring tool 100 is provided with a magnetic body 28. This makes it possible to prevent the steel rule 40 inserted into the main body 20 from shifting in position.

[0034] 5. Modifications The pulley alignment measurement tool 100 of this embodiment may employ the following modifications.

[0035] The magnetic body 26 may be made of any material, shape, and number within a range that can exert an attractive force that magnetically attracts the bottom surface 221 of the pulley alignment measurement tool 100 to the flat portion 141. Furthermore, if an operator performs work while holding the pulley alignment measurement tool 100 in his or her hand, the magnetic body 26 is not an essential component of the pulley alignment measurement tool 100.

[0036] 5-2. Magnetic body 28 Any material, shape, and quantity may be used for the magnetic body 28, as long as the steel rule 40 inserted into the main body 20 of the pulley alignment measurement tool 100 does not shift out of position due to its own weight or the like, and the worker can slide the steel rule 40. Furthermore, as long as the fit between the slot 30 and the steel rule 40 is set so that the steel rule 40 inserted into the main body 20 does not shift out of position due to its own weight or the like, the magnetic body 28 is not an essential component of the pulley alignment measurement tool 100.

[0037] 5-3. Measurement Process In the first and second measurement processes, the worker removes the pulley alignment measurement tool 100 from the flat portion 141 to read the scale. However, if the scale can be read while the pulley alignment measurement tool 100 is magnetically attached to the flat portion 141, removing the pulley alignment measurement tool 100 from the flat portion 141 is not essential. Furthermore, if the scale on the steel rule 40 protruding from the tip surface of the post 24 is visible while the pulley alignment measurement tool 100 is magnetically attached to the flat portion 141, the value of that scale may be used. In this case, the post-side cutout 32 contributes to improving the visibility of the scale. The post-side cutout 32 is not an essential component.

[0038] 5-4. Installation Structure of Driven Pulley 10 The pulley alignment measuring tool 100 can also be used for elevators in which the driven pulley 10 is fixed to the surface side of the flat portion 141. Figure 10 is a diagram showing an example in which the pulley alignment measuring tool is used for a modified installation structure of a driven pulley. As shown in this figure, in the measurement process, the worker can measure the first distance H1 and the second distance H2 using an area on the surface side of the flat portion 141 that does not come into contact with the driven pulley 10.

[0039] 5-4. Base 22 Figure 11 is a diagram illustrating a modified example of the pulley alignment measurement tool. As shown in this figure, the base 22 may have a base-side notch 222 cut out in the corner of the bottom surface 221 toward the graduations of the steel rule 40. The base-side notch 222 can improve the visibility of the graduations of the steel rule 40 when the pulley alignment measurement tool 100 is magnetically attached to the flat surface 141.

[0040] REFERENCE SIGNS LIST 1 Door device, 2 Door, 3 Opening / closing mechanism, 5 Door frame, 6 Suspension member, 7 Hanger roller, 8 Rail, 9 Drive pulley, 10 Driven pulley, 11 Belt, 12 Connecting member, 13 Door motor, 14 Mounting bracket, 20 Main body, 22 Base, 24 Pillar, 26 Magnetic material, 28 Magnetic material, 30 Slot, 32 Pillar side cutout, 40 Steel ruler, 51 Back, 100 Pulley alignment measuring tool, 141 Flat surface, 142 Left end, 143 Right end, 221 Bottom, 222 Base side cutout

Claims

1. A pulley alignment measuring tool for a driven pulley used in an opening and closing mechanism for opening and closing elevator doors, wherein the driven pulley is attached to a flat portion of a mounting bracket fixed parallel to the back surface of the elevator door frame, and the pulley alignment measuring tool comprises: a base portion having a bottom surface that contacts the flat portion of the mounting bracket, a pillar portion whose base end is connected to the base portion and whose tip end extends perpendicular to the bottom surface, and a main body portion having a slot that penetrates the interior of the pillar portion and whose penetration direction is perpendicular to the bottom surface; and a steel ruler having a scale on one surface, which is slidably inserted into the slot and has an end that protrudes from the bottom surface and contacts the back surface.

2. A pulley alignment measuring tool according to claim 1, wherein the base portion is provided with a magnetic material for magnetically attaching the bottom surface to the flat portion.

3. A pulley alignment measuring tool as described in claim 1 or claim 2, wherein the pillar portion is provided with a magnetic material for maintaining the position of the steel ruler.

4. A pulley alignment measuring tool as claimed in any one of claims 1 to 3, wherein the column portion has a column-side notch at the corner on the tip side that is cut out in the direction of the scale on the steel ruler.

5. A pulley alignment measuring tool as claimed in any one of claims 1 to 4, wherein the base portion has a base-side notch cut out at the corner of the bottom surface in the direction of the scale on the steel ruler.

6. A pulley alignment measurement method for measuring the pulley alignment of the driven pulley from the landing side of the elevator using the pulley alignment measurement tool according to any one of claims 1 to 5, comprising: a first installation step of installing the pulley alignment measurement tool from the landing side at a first position where the bottom surface of the base part contacts the surface side of the flat part of the mounting bracket and the steel ruler is outside the left end of the flat part; a first measurement step of sliding the steel ruler at the first position until the end of the steel ruler contacts the back surface of the door frame and measuring from the landing side using the value of the scale at the position where the steel ruler protrudes from the main body part as a first distance; and a second installation step of installing the pulley alignment measurement tool from the landing side at a second position where the bottom surface of the base part contacts the surface side of the flat part of the mounting bracket and the steel ruler is outside the right end of the flat part. a second measuring step of sliding the steel ruler at the second position until an end of the steel ruler contacts the back surface of the door frame, and measuring the value of the scale at a position where the steel ruler protrudes from the main body as a second distance from the landing side; and an evaluation step of evaluating whether the pulley alignment of the driven pulley is within a normal range based on whether a difference between the first distance measured in the first measuring step and the second distance measured in the second measuring step is equal to or less than a predetermined reference value.

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