JP5511000B2 - Elevator main rope tension measuring device and measuring method - Google Patents

Description

  The present invention relates to an apparatus and a method for individually measuring tensions of a plurality of ropes constituting a main rope of an elevator, and more specifically, measuring a difference in tension between a plurality of ropes to reliably adjust the tension of the ropes. It is related with the technique improved so that it can do.

In the conventional elevator, as shown in FIG. 14, the car 4 and the counterweight 5 are suspended in the shape of a fishing bottle by the main rope 3 wound around the traction sheave 1 and the deflecting sheave 2, and provided in the car 4. One end 3 a of the main rope 3 is locked to the hitch portion H 1, and the other end 3 b of the main rope 3 is locked to the hitch portion H 2 provided on the counterweight 5.
Similarly, in the elevator shown in FIG. 15, the car 4 and the counterweight 5 are suspended in the shape of a fishing bottle via the car-side sheave 4a and the weight-side sheave 5a, and one hitch portion provided on the machine beam 6 One end 3a of the main rope 3 is locked to H3, and one end 3b of the main rope 3 is locked to the other hitch portion H4 provided on the machine beam 6.

At this time, each hitch part H1-H4 which latches the edge part of the main rope 3 has the structure shown in FIG.
More specifically, for example, each end of three ropes 3-1, 3-2 and 3-3 constituting the main rope 3 is locked inside the socket 7a of the shackle rod 7. The rod 7b extending downward from the socket 7a is connected to the car 4, the counterweight 5 or the machine beam 6 via a coil spring 9 attached by a nut 8a and a washer 8b (for example, the following) (See Patent Document 1).

JP 2006-188315 A

  By the way, if there is a difference in tension between the ropes 3-1, 3-2 and 3-3 constituting the main rope 3 of the elevator, not only will there be a difference in the life of each rope, but the main sheave 1 Uneven wear occurs in the plurality of rope grooves provided in the deflecting sheave 2, the car-side sheave 4a, the weight-side sheave 5a, and the like, and early adjustment and replacement are necessary.

Therefore, it is necessary to individually measure the length L of each coil spring 9 in the hitch portion H shown in FIG. 16 and determine the difference in tension between the ropes 3-1, 3-2 and 3-3.
However, in addition to the large value of the spring constant of the coil spring 9, the natural length of each coil spring 9 varies, so that each rope 3-1, 3-3 is based on the length L of each coil spring 9. It is difficult to determine the difference in tension between 2,3-3.

  Accordingly, an object of the present invention is to solve the above-mentioned problems of the prior art and provide an apparatus and method capable of individually measuring the tensions of a plurality of ropes constituting the main rope of an elevator. The purpose is to ensure that the rope tension can be adjusted.

The present invention for solving the above problems is an apparatus for individually measuring tensions of a plurality of ropes constituting a main rope of an elevator,
An apparatus main body held by an operator;
A pair of abutting portions provided on the apparatus main body that abuts on the surface of the rope at two positions spaced along the longitudinal direction of the rope;
An engaging portion that engages with the rope, and measures the load necessary to bend the rope into a square shape by pulling the rope extending between the pair of abutting portions vertically toward the front side; And a scale supported by the apparatus main body.

That is, when individually measuring the tension of a plurality of ropes using the measuring apparatus of the present invention, the operator holds the apparatus main body by hand and presses the pair of contact portions against the rope to be measured. .
Next, in order to pull the rope extending between the pair of abutting portions vertically toward the front side to bend the rope into a square shape, the engaging portion of the scale is engaged with the rope.
Thereby, the magnitude | size of a load required in order to make a rope bend in a square shape, Therefore, the magnitude | size of the tension | tensile_strength acting on a rope can be measured indirectly with a scale.
Then, after finishing the load measurement for all of the plurality of ropes, the tension of the plurality of ropes is made equal by operating the hitch portion that locks each rope based on the obtained load value. Can be adjusted.

  Moreover, it is preferable that the measuring apparatus of the present invention further includes a position changing unit that can change the position at which the scale is supported on the apparatus main body in the vertical direction.

The position changing means includes a slide member that is slidable in the vertical direction with respect to the apparatus main body, and a screw shaft that extends in the vertical direction is interposed between the slide member and the apparatus main body. This can be achieved by a structure that supports a scale on the member.
As a result, by rotating the screw shaft, it is possible to optimally set the slide member with respect to the apparatus main body, and thus the support position in the vertical direction of the scale. Therefore, the tension of each rope is accurately measured with a commercially available scale. It becomes possible.

When the position changing means having such a structure is used, a fixing means for fixing the slide member to the apparatus main body so as not to slide is added.
In this case, the measuring device of the present invention is attached to the first rope of the plurality of ropes, and the vertical position of the slide member with respect to the device main body is changed by rotating the screw shaft to be displayed on the scale. For example, when the load to be displayed is 20 kilograms, the slide member is fixed to the apparatus main body using the fixing means.
Next, the measuring apparatus of the present invention is detached from the first rope, and the measuring apparatus of the present invention is attached to the second rope without changing the position of the slide member with respect to the apparatus main body.
At this time, if the tension of the first rope is equal to the tension of the second rope, the load value displayed on the scale should be 20 kilograms.
However, when different load values are displayed on the scale, the tension of the first rope is different from the tension of the second rope, so the first or second rope is locked. Adjust the tension of the rope by operating the hitch.

In addition, the position changing means is rotatable with respect to the apparatus main body, which is detachably engaged with a support portion provided at a base end portion of a commercially available balance in order to support the balance in a suspended state. It can be set as an eccentric cam.
As a result, by rotating the eccentric cam, the support position of the scale with respect to the apparatus main body can be changed in the vertical direction. Therefore, depending on the thickness of the rope to be measured, in other words, the bending of the rope for measuring the tension. The support position of the balance with respect to the apparatus main body is set to an optimum position according to the rigidity, and the tension of the rope can be accurately measured with a commercially available balance.

  ADVANTAGE OF THE INVENTION According to this invention, the apparatus which can measure the tension | tensile_strength of the several rope which comprises the main rope of an elevator separately, and the tension | tensile_strength adjustment of a rope can be performed reliably based on the tension | tensile_difference of several ropes are provided. Can be.

1 is an overall perspective view showing a tension measuring device according to a first embodiment. The principal part enlarged plan view of the tension | tensile_strength measuring apparatus shown in FIG. FIG. 3 is a cross-sectional view taken along the III-III break line in FIG. 2. The figure which shows the state which attaches the tension | tensile_strength measuring apparatus shown in FIG. 1 to a main rope. The figure which shows the state which attached the tension | tensile_strength measuring apparatus shown in FIG. 1 to the 1st rope. The figure which shows the state which bent the 1st rope in the square shape. The figure which shows the state which removed from the 1st rope, with the slide member of the tension | tensile_strength measuring apparatus shown in FIG. The figure which shows the state attached to the 2nd rope, with the slide member of the tension | tensile_strength measuring apparatus shown in FIG. The principal part enlarged plan view which shows the modification of the tension | tensile_strength measuring apparatus of 1st Embodiment. The whole perspective view showing the tension measuring device of a 2nd embodiment. The principal part enlarged plan view of the tension | tensile_strength measuring apparatus shown in FIG. Sectional drawing along the XII-XII fracture | rupture line in FIG. The perspective view explaining the action | operation of the eccentric cam shown in FIG. The figure which shows an example of the routing of the main rope in an elevator. The figure which shows the other example of the routing of the main rope in an elevator. The figure which shows the structure of the hitch part which latches the edge part of a main rope.

  Hereinafter, each embodiment of the tension measuring apparatus and measuring method for an elevator main rope according to the present invention will be described in detail with reference to FIGS.

First Embodiment First, a tension measuring device and a tension measuring method using the same according to a first embodiment will be described with reference to FIGS.

In the measuring apparatus 100 according to the first embodiment shown in FIGS. 1 to 3, a base plate 11, a handle 12 fixed to one end of the base plate 11, and a bolt B to the other end of the base plate 11 are fixed. The arm 13 constitutes an apparatus main body that is manually held by an operator who measures the tension of the rope.
Then, rollers 14 a and 14 b as a pair of abutting portions that abut against the surface of the rope at two positions spaced along the longitudinal direction of the rope for measuring the tension are rotatably attached to both ends of the arm 13. It has been.

Further, a slide plate 15 slidable in a direction indicated by an arrow A in FIG. 1, which is a direction perpendicular to a direction in which the rope extends when the pair of rollers 14a and 14b are pressed against the rope, is a base plate. 11 is provided on the surface.
A scale 17 is supported on the slide plate 15 by a cover 16 fixed on the slide plate 15.

The scale 17 is a commercially available scale of a type that measures the weight by hanging an article, and the weight measurement value is digitally displayed on the display window 17a.
As a result, a ring 18 for hanging and supporting the balance 17 is attached to one end of the balance 17, and a hook (engaging portion) for hanging an article whose weight is to be measured is attached to the other end. 19 is provided.

On the other hand, a boss 21 is fixed to one end of the slide plate 15 so that the ring 18 of the scale 17 can be hooked.
Also, a wing screw nut 23 is attached to the tip of a bolt 22 that extends through the base plate 11 and extends in the vertical direction, and extends integrally through the slide plate 15 and the boss 21. It has been.
As a result, when the thumbscrew nut 23 is loosened, the slide plate 15 can slide on the surface of the base plate 11 in the vertical direction (direction of arrow A). However, when the thumbscrew nut 23 is tightened, the slide plate 15 Is fixed on the surface of the base plate 11 so as not to slide.

Further, a nut 24 fixed to the surface of the other end of the slide plate 15 has a long hole (not shown) that extends through the base plate 11 and extends in the direction of arrow A, and extends through the slide plate 15. The thumbscrew bolts 25 extending through the bolt insertion holes are screwed together.
As a result, when the thumbscrew bolt 25 is loosened, the slide plate 15 can slide in the direction of arrow A on the surface of the base plate 11. However, when the thumbscrew bolt 25 is tightened, the slide plate 15 is moved to the base plate 11. Fixed non-slidable on the surface.

  That is, the bolt 22 and the wing screw nut 23 and the nut 24 and the wing screw bolt 25 constitute a fixing means in the measuring apparatus 100 of the first embodiment.

On the other hand, a rectangular parallelepiped block 26 is fixed to the end of the surface of the base plate 11 on the handle 12 side.
The bolt 27 whose base end is fixed to the boss 21 extends through the block 26, and a wing screw nut 28 is screwed to the tip thereof.
As a result, when the wing screw nut 28 is tightened in a state where the wing screw nut 23 and the wing screw bolt 25 are loosened, the bolt 27, the boss 21 and the slide plate 15 are integrally pulled toward the block 26 side. Therefore, the scale 17 can be pulled toward the block 26 side.

  Next, with reference to FIGS. 4-8, the procedure which measures the tension | tensile_strength of a rope using the tension | tensile_strength measuring apparatus 100 of this 1st Embodiment is demonstrated.

In the elevator 30 shown in FIG. 4, the car 31 is guided by a pair of left and right guide rails 32L and 32R, and is lifted and lowered, and the traction sheave 34 is rotationally driven by a hoisting machine 33 installed at the top of the hoistway. A main rope 35 is wound around.
One end side of the main rope 35 is wound around a pair of left and right car sheaves 36L and 36R provided on the upper portion of the car 31, and is then engaged with a hitch portion 37 provided on the top of the hoistway. It has been stopped.
Thereby, the worker W who intends to individually measure the tension of the plurality of ropes constituting the main rope 35 carries the tension measuring device 100 of the first embodiment and gets on the upper part of the car 31, The tension measuring device 100 of the first embodiment is pressed against each of a plurality of ropes in a portion of the main rope 35 that hangs down from the hitch portion 37.

At this time, the wing screw nut 23 and the wing screw bolt 25 are loosened so that the slide plate 15 can slide on the base plate 11 in the direction of arrow A, and the slide screw 15 is operated by operating the wing screw nut 28. The plate 15 and thus the hook 19 of the scale 17 is displaced toward the rope 35 side.
Then, as shown in FIG. 5, the pair of upper and lower rollers 14a and 14b are pressed against the first rope 35A, and the hook 19 of the scale 17 is engaged with the first rope 35A.

Next, as shown in FIG. 6, when the wing screw nut 28 is operated to pull the bolt 27 toward the handle 12, the slide plate 15, and thus the entire scale 17, is pulled toward the handle 12.
As a result, the hook 19 of the scale 17 draws the portion extending between the pair of upper and lower rollers 14a, 14b of the rope 35A toward the front side in the direction of the arrow A (vertical direction) and bends it into a square shape. The portion 17a displays a load value corresponding to the magnitude of the bending angle θ of the rope 35A and the magnitude of the tension acting on the rope 35A.
Then, the wing screw nut 28 is further operated to pull the hook 19 in the direction of the arrow A, and when the load value displayed on the display portion 17a of the scale 17 reaches a predetermined value, for example, 20 kilograms, the wing screw nut The slide plate 15 is fixed to the base plate 11 so as not to slide.

Thereafter, as shown in FIG. 7, the tension measuring device 100 is removed from the first rope 35A with the slide plate 15 fixed to the base plate 11 so as not to slide, and the second rope as shown in FIG. The tension measuring device 100 is attached to 35B.
At this time, when the tension of the first rope 35A and the tension of the second rope 35B are equal, the load value displayed on the display unit 17a of the scale 17 is both 20 kilograms.
However, when different load values are displayed, the tension of the first rope 35A and the tension of the second rope 35B are different.

Similarly, a plurality of ropes 35C, 35D. . . By repeating the above-described operations for all of the ropes 35A, 35B. . . . It is possible to reliably detect the difference in tension.
And each rope 35A, 35B. . . . By operating each shackle rod of the hitch portion 37 based on the tension difference between the ropes 35A, 35B. . . . The tension can be adjusted to be equal.

That is, the tension measuring device 100 according to the first embodiment includes the other ropes 35 </ b> B, 35 </ b> C, etc. on the basis of the tension of the first rope 35 </ b> A among the plurality of ropes constituting the main rope 35. . . . The relative magnitude of the tension is measured.
Thereby, since the difference in tension acting on each of the plurality of ropes constituting the main rope 35 can be easily detected, each rope can be operated by operating the shackle rod 7 of the hitch portion 37 individually. 35A, 35B. . . . Can be adjusted reliably so that the tensions of the two are equal.

Modified Example Next, with reference to FIG. 9, a modified example of the tension measuring device 100 of the first embodiment will be described. The tension measuring device 150 of this modified example shows the slide position of the slide plate 15 with respect to the base plate 11 described above. The scale 40 is engraved on the base plate 11.

Using this tension measuring device 150, the ropes 35A, 35B. . . . When the tension is measured, the tension measuring device 150 is attached to the first rope 35A of the plurality of ropes, and the slide plate 15 is slid by operating the wing screw nut 28 to display the display portion 17a of the balance 17. The value of the load displayed on the screen is, for example, 20 kilograms, and the slide position of the ride plate 15 at that time is confirmed by the scale 40 and recorded.
Similarly, the tension measuring device 150 is connected to the second and subsequent ropes 35B. . . . The slide position of the slide plate 15 when the wing screw nut 28 is operated so that the load displayed on the display portion 17a of the balance 17 becomes 20 kilograms is confirmed by the scale 40 and recorded.

At this time, each rope 35A, 35B. . . . When the tensions are equal, the scale 40 indicating the slide position of the slide plate 15 should have the same value.
However, the value of the scale 40 indicating the slide position of the slide plate 15 is the rope 35A, 35B. . . . Since the tension of each rope is different in each case, each shackle rod of the hitch portion 37 that holds each rope is operated to adjust the tension of each rope to be equal.

That is, the tension measuring device 150 according to the present modification includes a plurality of ropes 35A, 35B... Based on the load value displayed on the display window 17a of the balance 17, like the measuring device 100 of the first embodiment described above. . . . Rather than detecting the difference in tension between the ropes 35A, 35B. . . . It detects the difference in tension.
Thereby, also in the tension measuring apparatus 150 of this modification, the difference of the tension | tensile_strength which each acts on the several rope which comprises the main rope 35 is easy like the measuring apparatus 100 of 1st Embodiment mentioned above. Therefore, by operating the shackle rod 7 of the hitch portion 37 individually, the ropes 35A, 35B. . . . Can be adjusted reliably so that the tensions of the two are equal.

Second Embodiment Next, a tension measuring device according to a second embodiment will be described with reference to FIGS.

The tension measuring device 200 according to the second embodiment has a simplified structure of the tension measuring device 100 according to the first embodiment described above.
Specifically, the tension measuring device 200 includes a base plate 51, a handle 52 fixed to one end of the base plate 51, and an arm 53 attached to the other end of the base plate 51.
A pair of rollers 54 a and 54 b that contact the surface of the rope at two locations spaced along the longitudinal direction of the rope whose tension is to be measured are rotatably attached to both ends of the arm 53.

A cover 55 for supporting the scale 17 is fixed to the surface of the base plate 11.
Further, an eccentric cam 57 for hooking the ring 18 of the scale 17 is fitted between the pair of left and right protrusions 56, 56 protruding from the surface of the base plate 11, and is prevented from rotating. 58 is fixed.

As shown in an enlarged view in FIG. 13, the eccentric cam 57 includes a pair of upper and lower flange portions 57a and 57b disposed at intervals in the vertical direction, and a circle disposed between the flange portions 57a and 57b. It has a columnar portion 57c and a bolt insertion hole 57d penetrating in the vertical direction.
At this time, the bolt insertion hole 57d is eccentrically provided by a predetermined distance with respect to the center of the cylindrical portion 57c.
Accordingly, as shown in FIG. 13, by selecting the orientation when the eccentric cam 57 is fitted between the pair of left and right protrusions 56, 56, the cylindrical portion 57c is closest to the handle 52. The distance between the portion 57e and the center of the bolt insertion 57d can be L1 or L2.

Therefore, as shown in FIG. 11, when the eccentric cam 57 is set so that the distance between the portion 57e of the cylindrical portion 57c closest to the handle 52 and the center of the bolt insertion 57d is L1, the balance 17 The whole is supported on the base plate 51 with the arm 53 approaching.
On the other hand, when the eccentric cam 57 is set so that the distance between the portion 57e of the cylindrical portion 57c closest to the handle 52 and the center of the bolt insertion 57d is L2, the balance 17 is entirely attached to the handle 52. It is supported on the base plate 51 in the approached state.

Therefore, when the rope for measuring the tension is thick and its bending rigidity is high, the scale 17 can be arranged close to the arm 53 by setting the eccentric cam 57 as shown in FIG. The operation of hooking the rope on the hook 19 of the scale 17 can be easily performed.
On the other hand, if the rope for measuring the tension is thin and its bending rigidity is low, the scale 17 can be placed close to the handle 52 by setting the eccentric cam 57 in the opposite direction. The load required to bend into a square shape can be reliably measured by the balance 17.

That is, the tension measuring apparatus 200 according to the second embodiment measures the load necessary to bend each of the plurality of ropes constituting the main rope into a square shape by using the commercially available scale 17, thereby Since the rope tension is measured, the structure is simple and can be easily manufactured.
In addition, since the portion that engages with the ring 18 for supporting the balance 17 is the eccentric cam 57, it is possible to support the balance 17 at an optimum position according to the thickness of the rope for measuring the tension. The tension of the rope can be accurately measured by a commercially available scale 17.

The embodiments and modifications of the elevator main rope tension measuring device and measurement method of the present invention have been described in detail above, but the present invention is not limited to the above-described embodiments and modifications, and various modifications are possible. Needless to say.
For example, in the embodiment and the modification described above, the rope 35A. . . . Although the pair of abutting portions that abut on both the rollers 14 and 54 are rotatable, it goes without saying that they can be replaced with blocks fixed to the arms 13 and 53.
Further, the portion for measuring the tension of the rope using the tension measuring device of the present invention is not limited to the portion of the main rope 35 where the car 31 is suspended, as shown in FIG. As shown in FIG. 15, the tension can be measured by applying the tension measuring device of the present invention to the portion of the main rope 3 where the counterweight 5 is suspended.
Further, the present invention relates to a tension measuring device and a measuring method for a main rope, but it can also be applied to the tension measurement of various devices used in an elevator path such as a governor rope and a compen rope other than the main rope.

11, 51 Base plate (base member)
12, 52 Handle 13, 53 Arm 14, 54 Roller (contact part)
15 Slide plate (slide member)
16, 55 Cover 17 Scale 18 Ring 19 Hook (engagement part)
21 Boss 22 Bolt 23 Wing Screw Nut 25 Wing Screw Bolt 26 Block 27 Bolt 28 Wing Screw Nut 40 Scale 56 Projection 57 Eccentric Cam 100 Tension Measuring Device 150 of the First Embodiment 150 Tension Measuring Device 200 of the Modified Embodiment 200 Tension measuring device

Claims (3)

A device for individually measuring the tension of a plurality of ropes constituting the main rope of an elevator,
An apparatus main body that an operator can hold;
A pair of abutting portions provided on the apparatus main body, which abut against the surface of the rope at two positions spaced along the longitudinal direction of the rope;
An engaging portion that engages with the rope, and measures a load required to bend the rope extending between the pair of abutting portions in a substantially "<" shape by pulling the rope forward in the vertical direction; A scale supported by the device body;
Position changing means for changing the position of supporting the scale on the apparatus main body in the vertical direction;
A slide member slidable in the vertical direction with respect to the apparatus main body;
Fixing means for fixing the slide member to the apparatus main body so as not to slide;
With
The position changing means is a screw shaft that is interposed between the apparatus main body and the slide member and extends in the vertical direction,
The elevator main rope tension measuring device , wherein the scale is supported on the slide member . The position changing means is detachably engaged with a support portion provided at a base end portion of the scale to support the scale in a suspended state, and is rotatable with respect to the apparatus main body. The tension measuring device for an elevator main rope according to claim 1 , wherein the tension measuring device is an eccentric cam. A method for individually measuring tensions of a plurality of ropes constituting an elevator main rope using the elevator main rope tension measuring device according to claim 1 ,
The tension measuring device is attached to a first rope among the plurality of ropes,
Measuring the load required to bend the first rope extending between the pair of contact portions vertically in the vertical direction with the scale,
Operate the screw shaft so that the load value displayed on the scale becomes a predetermined value, and slide the slide member with respect to the apparatus main body,
When the load value displayed on the scale reaches the predetermined value, the fixing member is operated to fix the slide member to the apparatus main body,
With the slide member fixed to the apparatus body, the tension measuring device is detached from the first rope and attached to a second rope among the plurality of ropes,
Record the value of the load displayed on the scale when the second rope is engaged with the engagement portion of the scale,
The elevator main rope characterized in that the difference between the tension of the first rope and the tension of the second rope is measured based on the predetermined value and the load value recorded for the second rope. Tension measurement method.

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