CN113165837A - Tension measuring device for elevator - Google Patents
Tension measuring device for elevator Download PDFInfo
- Publication number
- CN113165837A CN113165837A CN201880099706.4A CN201880099706A CN113165837A CN 113165837 A CN113165837 A CN 113165837A CN 201880099706 A CN201880099706 A CN 201880099706A CN 113165837 A CN113165837 A CN 113165837A
- Authority
- CN
- China
- Prior art keywords
- measuring device
- tension
- tension measuring
- elevator
- rope
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/12—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions in case of rope or cable slack
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/14—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions in case of excessive loads
Landscapes
- Maintenance And Inspection Apparatuses For Elevators (AREA)
- Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
Abstract
In a tension measuring device for an elevator, a plurality of rope end rods are connected to corresponding suspension bodies. The corresponding rope end rods respectively penetrate through the rope end springs. A plurality of nuts are screwed into the respective rope end rods. The displacement scores respectively detect the extension and retraction of the corresponding rope head spring. The measuring unit measures the tension of each of the plurality of suspension bodies independently from the signals from the plurality of displacement meters.
Description
Technical Field
The present invention relates to a tension measuring device for an elevator, which measures tension of a suspension body suspending a car, for example.
Background
In a conventional elevator main rope tension measuring device, a plurality of nuts are attached to a head rod. Further, the string head rod penetrates the spring, the spring seat, the sensor portion, and the sensor fixing portion. The spring seat contacts the upper end of the spring. The sensor fixing portion is in contact with a lower end of the nut. The sensor portion is interposed between the spring seat and the sensor fixing portion. The sensor unit is provided with a strain gauge (see, for example, patent document 1).
Documents of the prior art
Patent document
Patent document 1: japanese patent No. 6170810
Disclosure of Invention
Problems to be solved by the invention
In the conventional main rope tension measuring device as described above, since the strain gauge detects the strain of the sensor unit, the sensor unit is aged or the characteristics of the strain gauge change, although the structure is simple, and thus the measurement stability is insufficient.
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a tension measuring device for an elevator, which can measure the tension of a suspended body more stably for a long period of time.
Means for solving the problems
The tension measuring device for an elevator of the present invention comprises: a plurality of rope end rods (shacklerod) which are respectively connected with the corresponding suspension bodies; a plurality of rope end springs (shake springs), through which the corresponding rope end rods respectively penetrate; a plurality of nuts that are respectively screwed into the corresponding head rods; a plurality of displacement meters which respectively detect the extension and retraction of the corresponding rope end spring; and a measuring unit that independently measures the tension of each of the plurality of suspension bodies based on signals from the plurality of displacement meters.
Effects of the invention
The tension measuring device for an elevator according to the present invention detects the expansion and contraction of each of the plurality of head springs by using the plurality of displacement meters, and therefore can measure the tension of the suspended body more stably for a long period of time.
Drawings
Fig. 1 is a schematic configuration diagram showing a machine-roomless elevator according to embodiment 1 of the present invention.
Fig. 2 is a front view showing the tension measuring device of fig. 1.
Fig. 3 is a plan view showing the base of fig. 2.
Fig. 4 is a front view showing a connection state of the 1 st coupling member and the wire (wire) of fig. 2.
Fig. 5 is a side view showing a connection state of the 1 st connecting member and the wire of fig. 4.
Fig. 6 is a front view illustrating the 2 nd coupling member of fig. 2.
Fig. 7 is a side view showing the 2 nd coupling member of fig. 6.
Fig. 8 is a front view illustrating the 3 rd coupling part of fig. 2.
Fig. 9 is a side view showing the 3 rd coupling member of fig. 8.
Fig. 10 is an explanatory diagram showing a difference in measurement error caused by the connection position of the wire.
Fig. 11 is a plan view showing a 1 st modification of the chassis of fig. 3.
Fig. 12 is a plan view showing a 2 nd modification of the chassis of fig. 3.
Fig. 13 is a front view showing an elevator tension measuring device according to embodiment 2 of the present invention.
Fig. 14 is a front view showing an elevator tension measuring device according to embodiment 3 of the present invention.
Fig. 15 is a front view showing an elevator tension measuring device according to embodiment 4 of the present invention.
Fig. 16 is a configuration diagram showing a modification in which the tension measuring device is installed in the machine room.
Detailed Description
Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
Embodiment mode 1
Fig. 1 is a schematic configuration diagram showing a machine-roomless elevator according to embodiment 1 of the present invention, and shows a state at the time of maintenance and inspection. In the figure, a hoisting machine 2 is provided at a lower portion in a hoistway 1. The hoisting machine 2 has a hoisting machine main body 3 and a drive sheave 4.
The hoisting machine main body 3 includes a hoisting machine motor not shown and a hoisting machine brake not shown. The traction machine motor rotates the drive sheave 4. The hoisting machine brake holds the driving sheave 4 in a stationary state or brakes the rotation of the driving sheave 4.
A plurality of suspension bodies 5 are wound around the drive sheave 4. In fig. 1, only 1 suspension 5 is shown. As each suspension body 5, for example, a rope or a belt is used.
The car 6 is suspended by a suspension body 5 from one side of the drive sheave 4. The counterweight 7 is suspended from the other side of the drive sheave 4 by the suspension body 5. In fig. 1, the car 6, the hoisting machine 2, and the counterweight 7 are shown side by side for simplicity, but actually, the counterweight 7 is disposed directly behind or directly beside the car 6 as viewed from directly above.
Each suspension body 5 has a 1 st end portion 5a as an end portion on the car 6 side and a 2 nd end portion 5b as an end portion on the counterweight 7 side.
A 1 st car hanging sheave 8a and a 2 nd car hanging sheave 8b are provided at a lower portion of the car 6. A counterweight hanging wheel 9 is arranged on the upper part of the counterweight 7. A 1 st return sheave 10 and a 2 nd return sheave 11 are provided at an upper portion in the hoistway 1.
Each suspension body 5 is wound around the 1 st car hanging wheel 8a, the 2 nd car hanging wheel 8b, the 1 st diverting pulley 10, the drive sheave 4, the 2 nd diverting pulley 11, and the counterweight hanging wheel 9 in this order from the 1 st end 5a side to reach the 2 nd end 5 b. That is, the car 6 and the counterweight 7 are moved in a direction of 2: 1 hanging in a rope winding way.
A tension measuring device 12 is provided above the 1 st car sheave 8a in the hoistway 1. The tension measuring device 12 measures the tension of each of the plurality of suspension bodies 5.
The tension measuring device 12 includes a 1 st string head combining mechanism 13 and a measuring device main body 14. The 1 st rope hitch 13 is connected to the 1 st end 5a of the entire suspension 5. Fig. 1 shows the situation where the operator is adjusting the 1 st rope head combination 13 above the car 6.
A 2 nd rope hitch 15 is provided above the counterweight sheave 9 in the hoistway 1. The 2 nd rope hitch 15 is connected to the 2 nd end 5b of the entire suspension body 5. The structure of the 2 nd rope end combination mechanism 15 is the same as that of the 1 st rope end combination mechanism 13.
Fig. 2 is a front view showing the tension measuring device 12 of fig. 1, and is a view of the tension measuring device 12 as viewed from above the car 6. The 1 st string head combining mechanism 13 has a base 21, a plurality of string head rods 22, a plurality of string head springs 23, a plurality of spring seats 24, a plurality of spring receivers 25, and a plurality of nuts 26.
The base 21 is supported and fixed by a support beam not shown. The plurality of rope ends 22 are connected to the 1 st end 5a of the corresponding suspension body 5. Further, each of the rope levers 22 penetrates the base 21.
The plurality of head springs 23 are supported on the base 21. Each of the string head springs 23 expands and contracts in accordance with the tension of the corresponding suspension body 5. Further, the corresponding string head rod 22 penetrates each string head spring 23.
Each spring seat 24 is interposed between the corresponding tether spring 23 and the base 21. Further, the corresponding rope end rod 22 penetrates each spring seat 24.
Each spring receiver 25 is supported on the corresponding topping spring 23. Further, the corresponding string head rods 22 penetrate the respective spring receivers 25.
Each nut 26 is screwed into the corresponding rope end 22 above the corresponding spring receiver 25. The rope rods 22 are screwed into two nuts 26, respectively. The two nuts 26 screwed into the respective rope levers 22 function as double nuts. By adjusting the amount of screwing of these nuts 26, the tension of each suspension body 5 can be adjusted.
The plurality of rope end levers 22 are arranged in front and rear rows as viewed from above the car 6. In this example, 4 of the end ropes 22 are arranged at equal intervals in the front row, and 3 of the end ropes 22 are arranged at equal intervals in the rear row.
The rope ends 22 in the rear row are respectively disposed between the rope ends 22 in the front row when viewed from above the car 6.
Fig. 3 is a plan view showing the base 21 of fig. 2. The base 21 is provided with a plurality of base holes 21 a. Each base hole 21a is penetrated by a corresponding rope end 22. Therefore, the arrangement of the rope end rod 22 when viewed from directly above is the same as that of the base hole 21 a.
Along with the arrangement of the string head rod 22, the plurality of string head springs 23 are also arranged in front and rear rows. The plurality of nuts 26 are also arranged in front and rear rows.
Returning to fig. 2, the measurement device main body 14 includes a housing 31, a plurality of differential transformers (transducers) 32 as displacement meters, a measurement unit 33, a plurality of 1 st coupling members 34, a plurality of 2 nd coupling members 35, a plurality of 3 rd coupling members 36, a plurality of wires 37 as transmission members, a plurality of step-up members 38, and a display unit 39.
The frame 31 includes a 1 st vertical frame 31a, a 2 nd vertical frame 31b, a 1 st upper beam 31c, and a 2 nd upper beam 31 d. The 1 st vertical frame 31a and the 2 nd vertical frame 31b are vertically erected and fixed on the base 21.
The 1 st upper beam 31c and the 2 nd upper beam 31d are horizontally fixed between the 1 st vertical frame 31a and the 2 nd vertical frame 31b, respectively. The 2 nd upper beam 31d is disposed rearward of the 1 st upper beam 31c when viewed from above the car 6. The 1 st upper beam 31c and the 2 nd upper beam 31d are arranged to be vertically offset. In this example, the 1 st upper beam 31c is disposed at a position lower than the 2 nd upper beam 31 d.
4 of the plurality of differential transformers 32 are attached to the 1 st upper beam 31c and correspond to the head springs 23 in the front row, respectively. 3 of the plurality of differential transformers 32 are mounted on the 2 nd upper beam 31d, and correspond to the head springs 23 in the rear row, respectively. Each differential transformer 32 is disposed directly above the corresponding string head spring 23.
Each differential transformer 32 includes a coil portion 32a, a core 32b, and a transformer spring 32 c. The mandrel 32b penetrates the coil portion 32 a. The transformer spring 32c is disposed between the coil portion 32a and the core 32 b.
Each of the mandrels 32b is displaced in the vertical direction with respect to the coil portion 32a in accordance with expansion and contraction of the corresponding string head spring 23. Each differential transformer 32 outputs a signal corresponding to the position of the stem 32b with respect to the coil portion 32a, and thereby detects the expansion and contraction of the corresponding head spring 23.
The measurement unit 33 and the display unit 39 are integrally configured. The measuring section 33 and the display section 39 are attached to the 1 st upper beam 31 c. The measurement unit 33 measures the tension of each of all the suspensions 5 independently from the signals from all the differential transformers 32. The function of the measurement unit 33 can be realized by a microcomputer, for example.
The display unit 39 displays the measurement result of the measurement unit 33. That is, the display unit 39 displays the tension of each of all the suspension bodies 5 independently. As the display unit 39, for example, a liquid crystal display can be used. The operator can adjust the tension of each suspension body 5 while checking the display of the display unit 39. Therefore, the display unit 39 is disposed at a position where the nut 26 can be operated and can be visually confirmed.
The measurement result of the measurement unit 33 is transmitted to an elevator control device, not shown. The elevator control device measures the load of the car 6 based on the measurement result of the measurement unit 33. That is, the tension measuring device 12 also functions as a scale device.
The string head springs 23 at the left and right ends of the front row are connected to the 1 st connecting member 34, respectively. The two string head springs 23 at the center of the front row are connected to the 2 nd connecting member 35, respectively. The 3 rd string head springs 23 in the rear row are connected to the 3 rd connecting member 36, respectively.
The coupling members 34, 35, and 36 are displaced in the vertical direction in accordance with expansion and contraction of the corresponding string end spring 23. That is, each of the coupling members 34, 35, and 36 is displaced in the vertical direction integrally with the upper end of the corresponding head spring 23. The lower end portions of the coupling members 34, 35, and 36 are disposed between the corresponding spring receiver 25 and the corresponding nut 26.
The plurality of raising members 38 are respectively provided between the 3 head springs 23 and the nuts 26 arranged in the rear row. In this example, each of the raising members 38 is interposed between the corresponding spring receiver 25 and the corresponding 3 rd coupling member 36. Further, each raising member 38 raises the position of the corresponding nut 26.
The plurality of wires 37 are connected between the plurality of coupling members 34, 35, and 36 and the plurality of differential transformers 32, respectively. Each wire 37 has flexibility. Further, each wire 37 transmits the displacement of the corresponding coupling member 34, 35, 36 to the corresponding differential transformer 32.
For example, when any of the plurality of coupling members 34, 35, and 36 is displaced downward, the corresponding mandrel 32b is pulled downward by the corresponding wire 37. When any of the plurality of coupling members 34, 35, and 36 is displaced upward, the corresponding wire 37 is loosened, and the corresponding core shaft 32b is pulled upward by the corresponding transformer spring 32 c.
Fig. 4 is a front view showing a connection state of the 1 st coupling member 34 and the wire 37 in fig. 2. Fig. 5 is a side view showing a connection state of the 1 st coupling member 34 and the wire 37 in fig. 4.
In fig. 4 and 5, the single-dot chain line indicates an extension line of the center axis of the string head lever 22 and the string head spring 23. The connection portion between each wire 37 and the corresponding connecting member 34, 35, 36 is located on the extension line of the central axis of the corresponding string end spring 23.
Each of the 1 st coupling members 34 has a 1 st coupling member body 34a, a 1 st upper flange 34b, and a 1 st lower flange 34 c. The 1 st coupling member body 34a has a C-shape with a 1 st opening 34d in the middle in the vertical direction. The left and right 1 st coupling members 34 are arranged line-symmetrically so that the 1 st opening 34d is located inward.
The 1 st upper flange 34b is located at an upper end of the 1 st coupling member main body 34 a. The 1 st lower flange 34c is located at the lower end of the 1 st coupling member main body 34 a.
The 1 st upper flange 34b and the 1 st lower flange 34c project in the same direction from the 1 st coupling member main body 34a and face each other. The 1 st upper flange 34b and the 1 st lower flange 34c are horizontal when the corresponding tie rod 22 is vertical.
The 1 st upper flange 34b is connected with a corresponding wire 37. The corresponding rope end 22 extends through the 1 st lower flange 34 c. The 1 st lower flange 34c is sandwiched between the corresponding spring receiver 25 and the corresponding nut 26.
Fig. 6 is a front view showing the 2 nd coupling member 35 of fig. 2. Fig. 7 is a side view showing the 2 nd coupling member 35 of fig. 6.
Each 2 nd connecting member 35 has a 2 nd connecting member main body 35a, a 2 nd upper flange 35b, and a 2 nd lower flange 35 c. The 2 nd coupling member main body 35a has a front shape of a C-shape having a 2 nd opening 35d at a middle portion in the vertical direction. The left and right 2 nd coupling members 35 are arranged line-symmetrically so that the 2 nd openings 35d are located inward.
The 2 nd upper flange 35b is located at the upper end of the 2 nd coupling member main body 35 a. The 2 nd lower flange 35c is located at the lower end of the 2 nd coupling member main body 35 a.
The 2 nd upper flange 35b and the 2 nd lower flange 35c project in the same direction from the 2 nd coupling member main body 35a and face each other. The 2 nd upper flange 35b and the 2 nd lower flange 35c are horizontal when the corresponding tie rod 22 is vertical.
The 2 nd upper flange 35b is connected with a corresponding wire 37. The corresponding rope end 22 penetrates the 2 nd lower flange 35 c. The 2 nd lower flange 35c is sandwiched between the corresponding spring receiver 25 and the corresponding nut 26.
Fig. 8 is a front view showing the 3 rd coupling member 36 of fig. 2. Fig. 9 is a side view showing the 3 rd coupling member 36 of fig. 8.
Each 3 rd coupling member 36 has a 3 rd coupling member main body 36a, a 3 rd upper flange 36b, and a 3 rd lower flange 36 c. The front shape of the 3 rd coupling member main body 36a is rectangular.
The 3 rd upper flange 36b is located at the upper end of the 3 rd coupling member main body 36 a. The 3 rd lower flange 36c is located at the lower end of the 3 rd coupling member main body 36 a.
The 3 rd upper flange 36b and the 3 rd lower flange 36c protrude from the 3 rd coupling member main body 36a in the same direction and face each other. The 3 rd upper flange 36b and the 3 rd lower flange 36c are horizontal when the corresponding tie rod 22 is vertical.
The 3 rd upper flange 36b is connected with a corresponding wire 37. The corresponding rope end 22 passes through the 3 rd lower flange 36 c. The 3 rd lower flange 36c is sandwiched between the corresponding raising member 38 and the corresponding nut 26.
As shown in fig. 2, the nuts 26 disposed in the rear row are located at the same height as the 1 st opening 34d and the 2 nd opening 35 d.
In the tension measuring device 12 for an elevator, the expansion and contraction of the plurality of rope springs 23 are detected by the plurality of differential transformers 32, respectively. The differential transformer 32 for detecting displacement is less likely to age than a strain gauge for detecting strain due to force, a load cell (load cell) for detecting force, or the like. Therefore, the tension of the suspension body 5 can be measured more stably for a long period of time.
Further, the tension of the plurality of suspension bodies 5 can be independently grasped, and the slack of the suspension bodies 5 can be independently coped with. This can cope with the variation in tension earlier, and can suppress the occurrence of biased wear in at least one of the suspension body 5 and the drive sheave 4.
Further, a plurality of coupling members 34, 35, 36 are connected between the plurality of head springs 23 and the plurality of differential transformers 32, respectively. Therefore, when the tension of the suspension body 5 is adjusted by moving the string head lever 22 upward, a sufficient adjustment margin can be secured.
Further, a plurality of wires 37 are connected between the plurality of differential transformers 32 and the plurality of coupling members 34, 35, and 36, respectively. Therefore, even when the rope end lever 22 is inclined, damage to the components can be prevented.
The connection portion between each wire 37 and the corresponding connecting member 34, 35, 36 is located on the extension line of the central axis of the corresponding string end spring 23. Therefore, the measurement error that occurs when the corresponding string end rod 22 tilts can be minimized.
Fig. 10 is an explanatory diagram showing a difference in measurement error caused by the connection position of the wire 37. In fig. 10, the 3 rd linking member 36 is shown, but the rising member 38 is omitted. The rope end lever 22 on the left side of fig. 10 is in a vertical state. The rope end 22 at the center and right side of fig. 10 is inclined at the same angle.
The wires 37 on the left and center in fig. 10 are connected to the 3 rd connecting member 36 on the extension of the center axis of the corresponding string head spring 23. The wire 37 on the right side in fig. 10 is connected to the 3 rd connecting member 36 at a position deviated from the extension line of the central axis of the corresponding topping spring 23.
As can be seen by comparing the center and the right side of fig. 10, when the connection portion of the wire 37 is deviated from the extension of the central axis of the topping spring 23, the deviated distance × the inclination angle of the topping bar 22 becomes a direct measurement error. Of these, the length of the filament 37 is considered to be constant.
The nuts 26 disposed in the rear row are located at the same height as the 1 st opening 34d and the 2 nd opening 35 d. Therefore, the nuts 26 disposed in the rear row can be easily handled through the 1 st opening 34d and the 2 nd opening 35 d. This makes it possible to easily operate all the nuts 26 from above the car 6.
Further, since the raising member 38 is used, the height of the nut 26 disposed in the rear row can be easily matched with the height of the 1 st opening 34d and the 2 nd opening 35 d.
Each differential transformer 32 is disposed directly above the corresponding string head spring 23. Therefore, the number of components can be suppressed from increasing, and the structure can be simplified.
The display unit 39 is disposed at a position where the nut 26 can be operated and can be visually confirmed. Therefore, the corresponding nut 26 can be operated while checking the tension of each suspension body 5, and the operability of the tension adjustment work can be improved.
In addition, the number of the suspension bodies 5 is not limited to 7. When the number of the suspension bodies 5 is 6, the arrangement of the string head rod 22, that is, the arrangement of the base hole 21a is, for example, the arrangement as shown in fig. 11. In this case, the right-hand 1 st coupling member 34 in fig. 2, the corresponding wire 37, and the differential transformer 32 can be omitted.
When the number of the suspension bodies 5 is 5, the arrangement of the string head rod 22, that is, the arrangement of the base hole 21a is, for example, the arrangement as shown in fig. 12. In this case, the 2 nd coupling member 35 and the 3 rd coupling member 36 on the right side in fig. 2, and the corresponding wire 37 and the differential transformer 32 are omitted. The right 1 st coupling member 34, the corresponding wire 37, and the differential transformer 32 can be supported by being shifted to the left.
Next, fig. 13 is a front view showing an elevator tension measuring device according to embodiment 2 of the present invention. In embodiment 2, all the coupling members 34, 35, and 36, all the wires 37, and all the raising members 38 are omitted. In addition, the 2 nd upper beam 31d is also omitted. Thereby, the rear row of 3 differential transformers 32 are mounted on the back side of the 1 st upper beam 31 c.
All the differential transformers 32 are disposed upside down from embodiment 1. The core shaft 32b of each differential transformer 32 is in contact with the upper end of the corresponding head spring 23 via the corresponding spring receiver 25.
For example, when the upper end of any of the plurality of the string head springs 23 is displaced downward, the stem 32b is pushed downward by the transformer spring 32c of the corresponding differential transformer 32. When the upper end of any of the plurality of string head springs 23 is displaced upward, the corresponding stem 32b is pushed upward. Other structures and operations are the same as those of embodiment 1.
With this configuration, the tension of the suspension body 5 can be measured more stably for a longer period of time. Further, the tension of the plurality of suspension bodies 5 can be independently grasped, and the slack of the suspension bodies 5 can be independently coped with. Further, the structure can be simplified as compared with embodiment 1.
Next, fig. 14 is a front view showing an elevator tension measuring device according to embodiment 3 of the present invention. In embodiment 3, the 3 rd connecting member 36 is used for all the string head springs 23. The front 3 rd coupling member 36 is shorter than the rear 3 rd coupling member 36 by the difference between the vertical position of the front differential transformer 32 and the vertical position of the rear differential transformer 32.
Note that all the raising members 38 are omitted, and the vertical positions of all the nuts 26 are the same. Other structures and operations are the same as those of embodiment 1.
With this configuration, the tension of the suspension body 5 can be measured more stably for a longer period of time. Further, the tension of the plurality of suspension bodies 5 can be independently grasped, and the slack of the suspension bodies 5 can be independently coped with. Further, the number of component types can be reduced and the structure can be simplified as compared with embodiment 1.
Next, fig. 15 is a front view showing an elevator tension measuring device according to embodiment 4 of the present invention. In embodiment 4, the 3 rd connecting member 36 is used for all the string head springs 23. All the 3 rd linking members 36 have the same length.
An attachment plate 31e is fixed to an upper portion of the frame 31. All of the differential transformer 32, the measurement section 33, and the display section 39 are fixed to the mounting plate 31 e. The displacement direction of the core shaft 32b of each differential transformer 32 is the horizontal direction.
A plurality of pulleys 40 as a steering member are attached to the attachment plate 31 e. Each pulley 40 is disposed directly above the corresponding 3 rd coupling member 36. Each pulley 40 is rotatable about a horizontal axis. Further, the corresponding wire 37 is hooked on each pulley 40. Further, each pulley 40 changes the direction of the corresponding wire 37 by 90 degrees or about 90 degrees.
The 4 differential transformers 32 and the 4 pulleys 40 corresponding to the 4 head springs 23 in the front row are disposed on the front surface side of the mounting plate 31 e. The 3 differential transformers 32 and the 3 pulleys 40 corresponding to the 3 rear-row tether springs 23 are disposed on the back surface side of the mounting plate 31 e. Other structures and operations are the same as those of embodiment 1.
With this configuration, the tension of the suspension body 5 can be measured more stably for a longer period of time. Further, the tension of the plurality of suspension bodies 5 can be independently grasped, and the slack of the suspension bodies 5 can be independently coped with. Further, the overall height dimension can be suppressed as compared with embodiment 3.
In embodiments 2 to 4, the number of suspension bodies 5 is not limited to 7.
Further, the steering member is not limited to the pulley. For example, the transmission member may be slid along a guide surface of a steering member fixed to the housing.
The steering member according to embodiment 4 may be applied to the configurations according to embodiments 1 and 3.
The transmission member may be a member other than a wire as long as it is a flexible string-like or tape-like member.
The displacement meter is not limited to the differential transformer, and may be a laser displacement meter, a magnetic displacement meter, an eddy current displacement meter, or the like. When a noncontact type displacement meter is used, the transmission member and the coupling member can be omitted. In the case of using a noncontact type displacement meter, the connection member may be connected to the string end spring, and the displacement of the connection member may be detected by the noncontact type displacement meter.
The display unit 39 may be formed separately from the measurement unit 33.
The structure of an elevator to which the tension measuring device of the present invention is applied is not limited to the structure of fig. 1. For example, as shown in fig. 16, the present invention can be applied to an elevator in which the hoisting machine 2 is installed in the machine room 16. In fig. 16, a hoisting machine 2 and a tension measuring device 12 are provided on a machine base 17 provided in a machine room 16.
Further, the roping method is not limited to 2: 1 roping, for example, may be 1: 1, winding the rope.
The present invention can be applied to various types of elevators such as double-deck elevators and single-shaft multi-car elevators. The single-shaft multi-car system is a system in which an upper car and a lower car disposed directly below the upper car are raised and lowered independently in a common shaft.
Description of the reference symbols
5: a suspension body; 12: a tension measuring device; 22: a rope end rod; 23: a rope end spring; 26: a nut; 32: differential transformers (displacement meters); 33: a measurement section; 34: 1 st connecting member; 34 d: 1 st opening; 35: a 2 nd connecting member; 35 d: a 2 nd opening; 36: a 3 rd connecting member; 37: a wire (transmission member); 38: a step-up member; 39: a display unit; 40: a pulley (steering member).
Claims (9)
1. A tension measuring device for an elevator, comprising:
a plurality of rope end rods which are respectively connected with the corresponding suspension bodies;
the rope head rods respectively penetrate through the rope head springs;
a plurality of nuts that are respectively screwed into the corresponding string end rods;
a plurality of displacement meters which respectively detect the extension and retraction of the corresponding rope end spring; and
and a measuring unit that independently measures the tension of each of the plurality of suspension bodies based on signals from the plurality of displacement meters.
2. The tension measuring device of an elevator according to claim 1,
the tension measuring device for an elevator further includes a plurality of connecting members connected to the plurality of rope springs, respectively, and displaced as the corresponding rope springs expand and contract.
3. The tension measuring device of an elevator according to claim 2,
the tension measuring device for an elevator further includes a plurality of transmission members each having flexibility and connected between the plurality of coupling members and the plurality of displacement meters, and transmitting the displacement of the corresponding coupling member to the corresponding displacement meter.
4. The tension measuring device of an elevator according to claim 3,
the connecting portion between each transmission member and the corresponding connecting member is located on an extension line of the central axis of the corresponding string end spring.
5. The tension measuring device of an elevator according to claim 3 or 4,
the plurality of rope end rods are arranged in front row and back row,
at least one of the connecting members arranged in the front row is a C-shape having an opening at a middle portion in the vertical direction,
at least one of the nuts disposed in the rear row is located at the same height as the opening.
6. The tension measuring device of an elevator according to claim 5,
and a raising component for raising the position of the corresponding nut is arranged between at least one rope end spring arranged on the rear row and the nut.
7. The tension determining apparatus of an elevator according to any one of claims 1 to 6,
each displacement meter is arranged right above the corresponding rope end spring.
8. The tension determining apparatus of an elevator according to any one of claims 3 to 6,
the tension measuring device for an elevator further includes a plurality of steering members that are disposed directly above the coupling members, and on which the corresponding transmission members are hooked, and that change the direction of the corresponding transmission members.
9. The tension determining apparatus of an elevator according to any one of claims 1 to 8,
the tension measuring device for an elevator further includes a display unit which is disposed at a position where the nut can be operated and which is visually confirmed, and displays a measurement result of the measuring unit.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2018/044910 WO2020115861A1 (en) | 2018-12-06 | 2018-12-06 | Elevator tension measurement device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113165837A true CN113165837A (en) | 2021-07-23 |
| CN113165837B CN113165837B (en) | 2022-07-29 |
Family
ID=70975062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880099706.4A Active CN113165837B (en) | 2018-12-06 | 2018-12-06 | Tension measuring device for elevator |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP7031015B2 (en) |
| CN (1) | CN113165837B (en) |
| WO (1) | WO2020115861A1 (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0398974A (en) * | 1989-09-08 | 1991-04-24 | Mitsubishi Electric Corp | Scaling device for elevator |
| JPH03182485A (en) * | 1989-12-12 | 1991-08-08 | Mitsubishi Electric Corp | Load detecting device for elevator |
| JPH07209109A (en) * | 1994-01-11 | 1995-08-11 | Mitsubishi Denki Bill Techno Service Kk | Tension measuring device |
| US20070170009A1 (en) * | 2004-04-28 | 2007-07-26 | Mitsubishi Denki Kabushiki Kaisha | Elevator Appartus |
| CN101920875A (en) * | 2009-06-15 | 2010-12-22 | 东芝电梯株式会社 | The load detecting device of elevator |
| JP2011016623A (en) * | 2009-07-09 | 2011-01-27 | Mitsubishi Electric Building Techno Service Co Ltd | Main rope tension inspection device of elevator |
| WO2016047330A1 (en) * | 2014-09-26 | 2016-03-31 | 三菱電機株式会社 | Device and method for detecting elongation of elevator rope |
| WO2018105110A1 (en) * | 2016-12-09 | 2018-06-14 | 三菱電機株式会社 | Weighing device for elevator |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1230370C (en) | 2001-06-28 | 2005-12-07 | 三菱电机株式会社 | Elevator load detecting system |
-
2018
- 2018-12-06 JP JP2020558749A patent/JP7031015B2/en active Active
- 2018-12-06 CN CN201880099706.4A patent/CN113165837B/en active Active
- 2018-12-06 WO PCT/JP2018/044910 patent/WO2020115861A1/en active Application Filing
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0398974A (en) * | 1989-09-08 | 1991-04-24 | Mitsubishi Electric Corp | Scaling device for elevator |
| JPH03182485A (en) * | 1989-12-12 | 1991-08-08 | Mitsubishi Electric Corp | Load detecting device for elevator |
| JPH07209109A (en) * | 1994-01-11 | 1995-08-11 | Mitsubishi Denki Bill Techno Service Kk | Tension measuring device |
| US20070170009A1 (en) * | 2004-04-28 | 2007-07-26 | Mitsubishi Denki Kabushiki Kaisha | Elevator Appartus |
| CN101920875A (en) * | 2009-06-15 | 2010-12-22 | 东芝电梯株式会社 | The load detecting device of elevator |
| JP2011016623A (en) * | 2009-07-09 | 2011-01-27 | Mitsubishi Electric Building Techno Service Co Ltd | Main rope tension inspection device of elevator |
| WO2016047330A1 (en) * | 2014-09-26 | 2016-03-31 | 三菱電機株式会社 | Device and method for detecting elongation of elevator rope |
| WO2018105110A1 (en) * | 2016-12-09 | 2018-06-14 | 三菱電機株式会社 | Weighing device for elevator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113165837B (en) | 2022-07-29 |
| JP7031015B2 (en) | 2022-03-07 |
| WO2020115861A1 (en) | 2020-06-11 |
| JPWO2020115861A1 (en) | 2021-09-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1741658B1 (en) | Elevator apparatus | |
| AU724219B2 (en) | Procedure and apparatus for the measurement of elevator load | |
| CN1795137B (en) | Emergency stop device of elevator | |
| KR20030003269A (en) | Load-carrying means for cable-operated elevators with an integrated load measurement device | |
| CN101495395B (en) | Elevator | |
| JPWO2017033322A1 (en) | Elevator equipment | |
| CN102596785A (en) | Method and device for testing the tension stress in tension elements of a tension element cord | |
| CN110023225B (en) | Elevator scale device | |
| EP1612176A1 (en) | Elevator load weighing device | |
| CN113165837B (en) | Tension measuring device for elevator | |
| CN108689274B (en) | Weighing device of elevator | |
| WO2020115901A1 (en) | Elevator device | |
| CN113165841B (en) | Tension measuring device for elevator | |
| KR100923174B1 (en) | Elevator having load measuring device | |
| JP2011042481A (en) | Load detecting device of elevator | |
| EP0427075B1 (en) | Procedure and apparatus for producing elevator load data | |
| JP2502158B2 (en) | Load detection device for elevator | |
| CN114585579B (en) | Tension measuring device for elevator | |
| JP5776424B2 (en) | Elevator equipment | |
| JP5403954B2 (en) | Elevator abnormality detection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |