JP2004017110A - Device for correcting circumferential length of metallic belt - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a correcting device of the circumferential length of a metallic belt the structure of which is more simplified and can be miniaturized. <P>SOLUTION: When correcting the circumferential length of the metallic belt 30, the metallic belt 30 which is engaged with a driving roller 12 and a driven roller 20 is extended by moving a slide base 18 for the driven roller loaded with the weight 80 in the same direction as the load imparted with a weight 80. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a metal belt circumference correction device that can correct the circumference of a metal belt to a desired length.
[0002]
[Prior art]
An endless metal belt is used for the continuously variable transmission. Since it is important to control the circumferential length of the endless metal belt, the circumferential length is adjusted using a method and an apparatus disclosed in, for example, JP-A-11-290971 and JP-A-2001-105050. Is done.
[0003]
First, a metal roller is provided with three rollers: a driving roller, a driven roller that can be approached and separated from the driving roller, and a correction roller that can be displaced in a direction perpendicular to the direction of displacement of these rollers at an intermediate position between the driving roller and the driven roller. Multiply. A weight for applying a force in a direction away from the driving roller is attached to the driven roller, and the metal belt is pulled by the three rollers with a tension corresponding to the weight of the weight. At this time, the circumference of the metal belt is actually measured from the distance between the axes of the driving roller and the driven roller.
[0004]
Next, a correction value is calculated from the difference between the measured value of the circumference of the metal belt and the design value of the circumference of the metal belt, and the correction roller is displaced in the direction in which the metal belt extends in accordance with the correction value. At this time, the driven roller approaches the drive roller against the weight of the weight, but this approach stops until a certain degree. Therefore, the straightening roller stretches the metal belt while the center distance between the driving roller and the driven roller is kept constant.
[0005]
[Problems to be solved by the invention]
However, in such a perimeter correcting device for a metal belt, a mechanism for actually measuring the perimeter of the metal belt and a mechanism for correcting the perimeter of the metal belt are separate, There is a problem that the structure of the device is complicated.
[0006]
Also, when correcting the circumference of the metal belt, the correction roller needs to apply an extra force corresponding to the weight of the weight attached to the driven roller, so a large driving device for the correction roller is required. There is also the problem of becoming.
[0007]
SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems of the related art, and has as its object to provide a metal belt circumference correcting device that has a simpler structure and can be reduced in size.
[0008]
[Means for Solving the Problems]
In order to solve the above-described problems and achieve the object, a metal belt circumference correcting device according to the present invention includes a driving roller attached to a base and driven by a motor, and a driving roller which is close to the driving roller on the base. A slide base that slides freely, a driven roller attached to the slide base, and a driven roller attached to the drive base and the driven roller to apply tension to a metal belt applied to the driven roller and the driven roller. A weight that applies a load in a direction away from the metal belt, and when correcting the circumferential length of the metal belt, the slide base is moved by a slide base moving unit in the same direction as the load applied by the weight.
[0009]
When correcting the circumferential length of the metal belt, the slide base on which the weight of the weight is applied is moved in the same direction as the load applied by the weight, and the metal applied to the drive roller and the driven roller is moved. Since the belt is stretched, the structure can be simplified and the device can be downsized.
[0010]
【The invention's effect】
According to the perimeter correcting device of the metal belt of the present invention, when correcting the perimeter of the metal belt, the drive roller is moved by moving the slide base on which the weight is applied in the same direction as the load given by the weight. Since the metal belt hung on the roller and the driven roller is extended, the structure of the device can be simplified, and the size of the device can be reduced.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings. FIGS. 1 to 3 are views for explaining the operation of the apparatus for correcting the circumference of a metal belt according to the present invention. In each figure, a is a side view of the apparatus, and b is a plan view of the apparatus. Show.
[0012]
A schematic configuration of a device for correcting the circumference of a metal belt according to the present invention will be described with reference to FIG. A drive roller 12 is attached to a front portion of the base 10. The drive roller 12 is rotated by a spindle motor 14 as a motor. A slide base guide 16 for a driven roller is attached to the base 10. On the driven roller slide base guide 16, a driven roller slide base 18 is attached as a slide base that slides toward and away from the drive roller 12. A driven roller 20 is attached to the driven roller slide base 18. A metal belt 30 whose circumference is corrected is hung between the driving roller 12 and the driven roller 20. A driven roller slide position detection sensor 42 as a slide position detection sensor for detecting the slide position of the driven roller 20 is attached to the driven roller slide base 18. A bracket 46 having a cutout 44 formed in a part thereof is attached to the slide base 18. A front end stopper 50 is provided on a front end surface 48 inside the cutout portion 44, and a rear end stopper 54 is provided on a rear end surface 52.
[0013]
At the rear of the base 10, a slide base guide 56 for a correction pulling portion is attached. On the slide base guide 56 for the correction pulling part, a slide base 58 for the correction pulling part that slides toward and away from the drive roller 12 is attached. A ball screw nut housing 60 is attached to the correction pulling portion slide base 58. On both side surfaces of the ball screw nut housing 60, a bracket driving arm 62 having a front end pressing stopper 64 abutting on the front end stopper 50 and a rear end pressing stopper 66 abutting on the rear end stopper 54 is attached. The ball screw nut housing 60 and the bracket driving arm 62 form a correction pulling portion. The ball screw nut 68 is attached to the ball screw nut housing 60. A servomotor 70 is attached to the rear of the base 10, and the servomotor 70 rotates a ball screw 72. The ball screw 72 is engaged with the ball screw nut 68, and the rotation of the servomotor 70 results in the movement of the bracket driving arm 62 toward the front end stopper 50 or the rear end stopper 54. A bracket drive slide position detection sensor 74 for detecting the slide position of the bracket drive arm 62 is attached to the correction pulling portion slide base 58. The servo motor 70 receives the position feedback based on the detection value of the bracket driving slide position detection sensor 74 and rotates the ball screw 72. The servo motor 70, the ball screw 72, the bracket driving slide position detection sensor 74, the ball screw nut housing 60, the bracket driving arm 62, and the bracket 46 form a slide base moving unit and a driving unit.
[0014]
A weight 80 having a weight of, for example, about 80 kg is connected to the rear end of the bracket 46. The weight 80 is vertically supported by a pulley 82. The load of the weight 80 is transmitted to the driven roller slide base 18 via the bracket 46, and is always applied in a direction to separate the driven roller 20 from the driving roller 12. Therefore, unless the metal belt 30 is hung between the driving roller 12 and the driven roller 20 and the front end pressing stopper 64 of the bracket driving arm 62 does not contact the front end stopper 50 of the bracket 46, the bracket 46 is in a free state. Therefore, the load of the weight 60 gives tension to the metal belt 30.
[0015]
Further, the metal belt 30 is hung between the driving roller 12 and the driven roller 20, the rear end pressing stopper 66 of the bracket driving arm 62 abuts the rear end stopper 54 of the bracket 46, and the bracket driving arm 62 is Is moved toward the rear end face 52 of the bracket 46 (when correcting the circumferential length of the metal belt), the metal belt 30 is forcibly extended. The force for extending the metal belt 30 by the servo motor 70 is in the same direction as the load applied by the weight 80 to the metal belt 30. Since the load of the weight 80 can be used effectively even when the circumferential length of the metal belt 30 is corrected, the capacity of the servomotor 70 can be reduced by the load of the weight 80.
[0016]
When the metal belt 30 is not hung between the driving roller 12 and the driven roller 20, the front end pressing stopper 64 abuts on the front end stopper 50, so that the position of the driven roller 20 depends on the position of the bracket driving arm 62. At the rear ends of the bracket driving arm 62 and the bracket 46, a contact detection sensor 76 for detecting with high accuracy that the rear end pressing stopper 66 has contacted the rear end stopper 54 is attached. The contact detection sensor 76 is a sensor that can detect that the rear end pressing stopper 66 has contacted the rear end stopper 54 with a resolution of about 0.4 μ. When correcting the circumference of the metal belt 30, the metal belt 30 is extended by a given dimension after the contact detection sensor 76 detects that the front end pressing stopper 64 has contacted the front end stopper 50.
[0017]
FIG. 4 is a block diagram of a control system of the perimeter correcting device for a metal belt according to the present invention.
[0018]
The driven roller slide position detection sensor 42 is a sensor attached to the driven roller slide base 18 and detects the slide position of the driven roller 20.
[0019]
The bracket drive slide position detection sensor 74 is a sensor attached to the correction pulling portion slide base 58, and detects the slide position of the bracket drive arm 62.
[0020]
The contact detection sensor 76 detects that the rear end pressing stopper 66 has contacted the rear end stopper 54.
[0021]
The servo motor 70 rotates the ball screw 72 to move the bracket driving arm 62 toward the front end stopper 50 or toward the rear end stopper 54.
[0022]
The spindle motor 14 is a motor that rotates the drive roller 12. When the metal belt 30 is hung between the driving roller 12 and the driven roller 20, the rotation of the driving roller 12 rotates the metal belt 30.
[0023]
The control unit 100 functions as a measuring unit, a slide position calculating unit, and a driving unit. The control unit 100 has a design value storage unit 105 as a set value storage unit that stores a design value of the circumference of the metal belt 30 serving as a master. The design value stored in the design value storage unit 105 may be a theoretical design value, but in the present embodiment, the circumference of the metal belt 30 serving as a master is actually measured by the present apparatus, and the measured value is used as a design value. I remember. The reason why the actual measured value of the master is stored instead of the theoretical design value is that an appropriate correction work can be expected for an environmental change such as a temperature change.
[0024]
When the control unit 100 functions as a measuring unit, tension is applied to the metal belt 30 only by the weight 80, and the metal belt 30 is moved based on the slide position of the bracket driving arm 62 detected by the driven roller slide position detection sensor 42. Measure the circumference of. When functioning as the slide position calculating means, a difference between an actually measured value of the measured circumference of the metal belt 30 and the design value stored in the design value storage unit 105 is obtained, and the circumference of the metal belt 30 is calculated from the difference. The slide position of the bracket drive arm 62 required to correct the design value is calculated. When functioning as the driving means, the bracket driving arm 62 drives the servomotor 70 until the calculated slide position is reached, thereby forcibly extending the circumference of the metal belt 30.
[0025]
Next, the operation of the metal belt circumference correction device according to the present invention will be described in detail with reference to the flowcharts of FIGS. This will be described with reference to FIGS. 1 to 4 and FIG.
[0026]
In this flowchart, three steps of "metal belt hooking", "metal belt circumference measurement", and "metal belt circumference correction" will be described in order. The general operation of each stage is as follows.
[0027]
When performing “metal belt hanging”, that is, when hanging the metal belt 30 between the drive roller 12 and the driven roller 20, the slide base 18 for the driven roller is moved to the drive roller side so that the drive roller 12 and the driven roller 20 Decrease spacing. When performing the “metal belt circumference measurement”, that is, when measuring the circumference of the metal belt 30, the driven roller slide base 18 is set free, and only the load of the weight 80 is applied to the driven roller slide base 18. Thus, tension is applied to the metal belt 30 hung between the driving roller 12 and the driven roller 20. When performing the “metal belt circumference correction”, that is, when correcting the circumference of the metal belt 30, the driven roller slide base 18 on which the weight of the weight 80 is applied is the same as the load given by the weight 80. In the direction to extend the circumference of the metal belt 30 hung between the driving roller 12 and the driven roller 20.
[0028]
Steps S1 to S4 in the flowchart shown in FIG. 5 are steps for performing a "metal belt hanging" process. When the "metal belt hanging" is performed, the sliding position of the bracket driving arm 62 is the position shown in FIG.
[0029]
First, the control unit 100 drives the servo motor 70 by entering the value X ₀ of the bracket drive slide position detection sensor 74 for performing the metal belt receiving (S1). The value of this X ₀ is moved forward pushing the stopper 64 of the bracket driving arm 62 is brought into contact with the front end stopper 50 of the bracket 46 as shown in FIG. 1, a bracket 46 to the driving roller 12 side against the load of the weight 80 This is a value for enabling the metal belt 30 to be easily hung between the driving roller 12 and the driven roller 20. Control unit 100 receives the value of the bracket drive slide position detection sensor 74, it is determined whether the value has reached X ₀ (S2). As if the value has not reached the _{X 0} (S2: NO), it continues to drive the servo motor 70. While the servo motor 70 is being driven, the bracket driving arm 62 moves to the driving roller 12 side. After the front end pressing stopper 64 of the bracket driving arm 62 comes into contact with the front end stopper 50 of the bracket 46, the bracket 46 moves toward the driving roller 12 against the load of the weight 80. With this movement, the driven roller 20 approaches the drive roller 12. Values bracket the driving slide position detection sensor 74 and reaches _{X 0} (S2: YES), the control unit 100 stops the driving of the servo motor 70 (S3). The state of the apparatus when stopped is as shown in FIG. That is, the driven roller 20 approaches the drive roller 12, and the metal belt 30 serving as a master or the metal belt 30 whose peripheral length has not been corrected can be easily applied to the driven roller 20 and the drive roller 12 (FIG. 1b). Therefore, the worker wears the metal belt under this condition (S4).
[0030]
Steps S5 to S10 in the flowchart shown in FIG. 5 are steps for performing the process of “measurement of metal belt circumference”. When the “metal belt circumference measurement” is performed, the sliding position of the bracket driving arm 62 is the position shown in FIG.
[0031]
Control unit 100 drives the servo motor 70 by entering a value X ₁ of the bracket driving slide position detection sensor 74 for performing the metal belt circumference measurement (S5). The value of this X ₁ is a front pressing stopper 64 and the rear end pressing the stopper 66 of the bracket driving arm 62 without contacting either of the front stopper 50 and rear stopper 54 of the bracket 46 as shown in FIG. 2 This is a value for causing the load of only the weight 80 to be applied to the metal belt 30 applied to the driven roller 20 and the driving roller 12. Control unit 100 receives the value of the bracket drive slide position detection sensor 74, it is determined whether the value has reached X ₁ (S6). If the value has not reached _{X 1} (S6: NO), it continues to drive the servo motor 70. While the servomotor 70 is being driven, the bracket driving arm 62 moves to the servomotor 70 side. After the front end pressing stopper 64 of the bracket driving arm 62 is separated from the front end stopper 50 of the bracket 46, the bracket 46 is pulled by the load of the weight 80, and the load of the weight 80 alone is applied to the driven roller 20 and the driving roller 12. On the metal belt 30 that has been set. That is, the metal belt 30 is stretched by the load of the weight 80. Values bracket the driving slide position detection sensor 74 and reaches the _{X 1} (S6: YES), the control unit 100 stops the driving of the servo motor 70 (S7). The state of the apparatus when stopped is as shown in FIG. 2, and tension is applied to the metal belt 30 by the weight 80 between the driven roller 20 and the driving roller 12.
[0032]
Next, the control unit 100 rotates the spindle motor 14 (S8). Control unit 100 reads the detection value _{Y B} of the driven roller slide position detection sensor 42 (S9).
When the measured value of the metal belt 30 to be a master and the design value, so that the value of the detected value Y _B is stored to the design value storage unit 105.
[0033]
Then, the control unit 100 calculates a displacement amount ΔY for correcting the circumferential length of the metal belt 30. This displacement amount is a distance that the metal belt 30 is stretched after the rear end pressing stopper 66 of the bracket driving arm 62 contacts the rear end stopper 54 of the bracket 46. The displacement amount ΔY is obtained by the following equation.
[0034]
_{ΔY = (L Z -L M)} / 2 + (Y M -Y B)
Here, L _Z represents the circumferential length of the desired metal belt 30 as a product, L _M is the circumferential length of the metal belt 30 serving as a master (design value stored in the design value storage unit 105), the Y _M Figure 7 so that the detected value of the driven roller slide position detection sensor 42 when the metal belt 30 serving as a master is stretched only in a load of the weight 80, Y _B is a metal belt 30 before the circumferential length modified as shown in FIG. 7 The detection values of the driven roller slide position detection sensor 42 when the weight 80 is stretched only by the load are shown (S10).
[0035]
The steps from S11 in the flowchart shown in FIG. 5 to S20 in the flowchart shown in FIG. 6 are steps for performing the “metal belt circumference correction” process. When the “metal belt circumference correction” is performed, the slide position of the bracket driving arm 62 is the position shown in FIG.
[0036]
After obtaining the displacement amount ΔY, the control unit 100 inputs the value ΔY and drives the servomotor 70 (S11). The controller 100 monitors whether or not the contact detection sensor 76 for detecting that the rear end pressing stopper 66 of the bracket driving arm 62 has contacted the rear end stopper 54 of the bracket 46 is turned on (S12). If the contact detection sensor 76 is not ON (S12: NO), the servo motor 70 continues to be driven. While the servomotor 70 is being driven, the bracket driving arm 62 moves to the servomotor 70 side. When the contact detection sensor 76 is turned on (S12: YES), the control unit 100 stops driving the servo motor 70 (S13). Control unit 100 reads the value _{X B} of the bracket drive slide position detection sensor 74 (S14). Control unit 100 drives the servo motor 70 after reading the value _{X B} (S15).
[0037]
Control unit 100 receives the value of the bracket drive slide position detection sensor 74, it is determined whether the value has reached X _{B +} ΔY (S16). If the value has not reached the _{X B + ΔY (S16: NO} ), it continues to drive the servo motor 70. While the servomotor 70 is being driven, the bracket driving arm 62 moves to the servomotor 70 side, and the rear end pressing stopper 66 of the bracket driving arm 62 presses the rear end stopper 54 of the bracket 46. For this reason, as shown in FIG. 3, the bracket 46 is pulled by the load of the weight 80 and the load given by the servomotor 70, and these loads are applied to the metal belt 30 applied to the driven roller 20 and the driving roller 12. Take it. That is, the metal belt 30 is forcibly pulled by these loads. Values bracket the driving slide position detection sensor 74 and reaches the _{X B + ΔY (S16: YES} ), the control unit 100 stops the driving of the servo motor 70 (S17). In this state, since the metal belt 30 is forcibly pulled between the driven roller 20 and the driving roller 12, the metal belt 30 is plastically deformed and its circumference becomes longer.
[0038]
Control unit 100, a length Y _A of the metal belt 30 in a state of being stretched by ΔY as in FIG. 7, read in brackets driving slide position detection sensor 74 (S18). Then, the control unit 100 obtains the circumferential length _{L A} of the metal belt 30 after circumference corrected by the following equation (S19).
[0039]
_{L A = L M -2 (Y} M -Y A)
When finished calculating the circumferential length _{L A,} the control unit 100 stops the spindle motor 14 (S20).
[0040]
Control unit 100, in order to to Hazuseru the metal belt 30 after circumference corrected, drives the servo motor 70 by entering the value X ₀ of the bracket drive slide position detection sensor 74 (S21). The value of this X ₀ is a front pushing stopper 64 of the bracket driving arm 62 is brought into contact with the front end stopper 50 of the bracket 46 as shown in FIG. 1, the metal belt 30 easily between the drive roller 12 and the driven roller 20 This is a value that can be removed. Control unit 100 receives the value of the bracket drive slide position detection sensor 74, it is determined whether the value has reached X ₀ (S22). As if the value has not reached the _{X 0} (S22: NO), it continues to drive the servo motor 70. While the servo motor 70 is being driven, the bracket driving arm 62 moves to the driving roller 12 side. After the front end pressing stopper 64 of the bracket driving arm 62 comes into contact with the front end stopper 50 of the bracket 46, the bracket 46 moves toward the driving roller 12 against the load of the weight 80. With this movement, the driven roller 20 approaches the drive roller 12. Values bracket the driving slide position detection sensor 74 and reaches _{X 0} (S22: YES), the control unit 100 stops the driving of the servo motor 70 (S23). The state of the apparatus when stopped is as shown in FIG. That is, the driven roller 20 approaches the drive roller 12, and the metal belt 30 after the circumference correction can be easily removed from the driven roller 20 and the drive roller 12 (see FIG. 1B). Therefore, the operator removes the metal belt under this condition (S24).
[0041]
As described above, in the apparatus for correcting the circumference of the metal belt according to the present invention, the circumference can be corrected using the slide of the driven roller 20 when the metal belt 30 is actually measured. A mechanism for actually measuring the circumference of the belt and a mechanism for correcting the circumference of the metal belt can be realized by a common mechanism, and the size of the apparatus can be reduced. When the circumference of the metal belt 30 is corrected, the metal belt 30 can be pulled by the servo motor 70 while utilizing the load of the weight 80 provided for actually measuring the circumference of the metal belt. As compared with the case where the circumference is corrected by the motor 70 alone, the capacity can be reduced by the load of the weight 80. This also leads to downsizing of the device.
[Brief description of the drawings]
FIG. 1 is a diagram for explaining the operation of a perimeter correcting device for a metal belt according to the present invention.
FIG. 2 is a diagram for explaining the operation of the metal belt circumference correction device according to the present invention.
FIG. 3 is a diagram for explaining the operation of the metal belt circumference correcting device according to the present invention.
FIG. 4 is a block diagram of a control system of the perimeter correcting device for a metal belt according to the present invention.
FIG. 5 is a flowchart showing an operation of the metal belt circumference correcting device according to the present invention.
FIG. 6 is a flowchart showing the operation of the metal belt circumference correcting device according to the present invention.
FIG. 7 is a diagram for explaining the operation of the metal belt circumference correcting device according to the present invention.
[Explanation of symbols]
10 ... Base,
12 ... drive roller,
14 ... Spindle motor,
16 ... Slide base guide for driven roller,
18 ... Slide base for driven roller,
20: driven roller,
30 ... metal belt,
42 ... Slide position detection sensor for driven roller,
44: Notch,
46 ... bracket,
48: front end face inside the notch,
50: front end stopper,
52 ... rear end face inside the notch,
54: rear end stopper,
56 ... Slide base guide for correction pulling part,
58 ... slide base for correction pulling part,
60 ... housing for ball screw nut
62 ... Bracket drive arm,
64: front end pressing stopper,
66 ... rear end pressing stopper,
68… Ball screw nut,
70 ... servo motor,
72 ... ball screw,
74 ... Slide position detection sensor for driving bracket
76 contact detection sensor,
80 ... weight,
82 ... pulley,
100 ... control unit,
105: Design value storage unit.

Claims (3)

A drive roller attached to the base and driven by a motor,
A slide base that slides on the base so as to be able to approach and separate from the drive roller,
A driven roller attached to the slide base,
A weight that applies a load in a direction to separate the driven roller from the driving roller on the slide base to apply tension to the metal belt hung on the driving roller and the driven roller;
A slide base moving means for moving the slide base in the same direction as the load applied by the weight when correcting the circumference of the metal belt;
A peripheral length correcting device for a metal belt, comprising: The slide base moving means,
When the metal belt is hung on the drive roller and the driven roller, the slide base is moved to the drive roller side to reduce the distance between the drive roller and the driven roller, and when measuring the circumference of the metal belt. When the tension is applied to the metal belt applied to the driving roller and the driven roller so that the slide base is free and only the load of the weight is applied to the slide base, and the circumferential length of the metal belt is corrected. The metal base applied to the driving roller and the driven roller is stretched by moving a slide base on which the load of the weight is applied in the same direction as the load applied by the weight, wherein the metal belt is extended. The perimeter correcting device for a metal belt according to claim 1. The slide base moving means,
A slide position detection sensor that detects a slide position of the driven roller;
Measuring means for measuring the circumference of the metal belt based on the slide position when tension is applied to the metal belt only by the weight,
Design value storage means for storing a design value of the circumference of the metal belt,
Slide position calculating means for calculating the slide position when correcting the circumference of the metal belt from the difference between the measured value of the metal belt and the design value,
Driving means for driving the slide base to the calculated slide position;
The peripheral length correcting device for a metal belt according to claim 1, comprising:

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