JPH0534186B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applied in the field of cableways by using a linear motor to drive a driving pulley and by maintaining the posture of the driving pulley constant. It is designed to ensure the required air gap.

[Conventional technology]

Cableway equipment involves winding a cable between pulleys installed at both ends of a cableway, and attaching a carrier to the cable in a removable or fixed manner, and moving the cable as the cable moves. It is widely known that transportation is carried out by operating a carrier, and that it is often used for transportation in mountains and slopes. One of the pulleys is used as a motive pulley to drive the cable, but in order to rotate the motive pulley, a normal high-speed rotating electric motor is used as the prime mover, as in the case of driving a general mechanical device, This rotation is decelerated by a gear reduction gear made up of a multi-stage gear group, and the torque is expanded to be transmitted to the driving pulley and rotated.

This driving method is the most stable and currently most economical and is widely used.

However, this drive method also uses electric motors.
The speed is relatively high at 1000 to 2000 RPM, and even if some noise is generated from cooling fans, etc., vibration from the gear reducer, etc., quiet operation is unavoidable. Nakatsuta.

In addition, in the case of large-capacity cableway equipment, the reduction gear mentioned above weighs several tons or more, making it difficult to transport to mountainous areas, and it is difficult to accurately install the machinery for these drive systems. , and it took effort to maintain.

[Problem to be solved by the invention]

On the other hand, technology and devices that use linear motors to drive disc-shaped driven objects have already been proposed and are in practical use in some industrial fields, but their use in driving cableway pulleys has not yet been put into practice. It has not yet been reached.

The diameter of the motive pulley is 3 to 4 m or more, depending on the diameter of the cable to be wrapped around it. When the pulley is rotated, it is difficult to maintain a constant posture at the peripheral edge of the pulley and to prevent some floating displacement from occurring. However, in general, in the configuration of a linear motor, it is necessary to maintain a constant air gap between the primary stator and the secondary conductor, and this point is a problem when using a linear motor to drive a motive pulley. They are one.

The present invention proposes a linear motor drive pulley in which floating displacement near the periphery of the drive pulley is corrected by a posture correction device in order to keep the gap between the primary and secondary sides of the linear motor constant at all times. The purpose of this invention is to develop a power pulley using a linear motor that eliminates the generation of vibrations, noise, etc. that occur in the conventional power device.

[Means to solve the problem]

Corresponding to this purpose, the cableway linear motor type driving device of the present invention is such that the cableway is wound around the periphery of a driving pulley and rotates around an axis position to drive the cable. A secondary conductor having an annular shape is fixed to the pulley concentrically with the shaft, and a primary stator is disposed on the fixed position side facing the secondary conductor and spaced apart from it by a predetermined gap. a linear motor formed of a linear motor, and a plurality of rollers having a ring-shaped rolling surface formed concentrically with the shaft on the driving pulley, and a plurality of rollers pivotally mounted on the fixed position side corresponding to the rolling surface. A posture correcting device comprising a rolling device,
The driving pulley is rotated by the thrust of the linear motor, and the rollers of the rolling device roll and support the rolling surface, thereby maintaining a required clearance of the linear motor. It is characterized by

[Effect]

In the linear motor type driving device of the present invention, the driving pulley is driven by a linear motor,
A posture correction device maintains the gap between the secondary conductor and the primary stator, which is necessary in a linear motor. When the primary stator of the linear motor is energized, thrust is generated in the secondary conductor, driving the drive pulley. The posture correction device consists of a rolling surface and a roller, the rolling surface is formed on a driving pulley, the roller is provided on the fixed side, and the contact between the roller and the rolling surface creates a gap necessary for driving the linear motor. hold.

〔Example〕

Representative examples of the present invention are shown below with reference to the drawings.
This will be explained using figures.

In FIG. 1, a driving pulley 1 is connected to a shaft 2, which is a vertical shaft.
It is pivoted at the center and is rotatable around the shaft 2 in a horizontal position. For example, a rubber liner 4 is provided around the entire circumference near the periphery 3 of the motive pulley 1, and a cable 5 is wound around and guided. It is folded back and strung up.

Next, in this configuration, the linear motor 10 is a double-sided type,
A fixed-side primary method is used. That is, the driving pulley 1 has a secondary conductor 12a which is annular in plan view.
12b are fixedly attached to the upper and lower surfaces of the motive pulley 1, respectively, at a radius R ₁ with the shaft 2 as the center. On the other hand, from the center of axis 2, the radius
At the R ₁ position, and at fixed positions radially and equally spaced from the center of the shaft 2, there are a plurality of primary stators 11a, 11a, 11 corresponding to the secondary conductor 12a.
a... is provided. Similarly, corresponding to the position of the secondary conductor 12b on the lower surface of the motive pulley 1, another primary stator 1 is placed at a lower position overlapping the primary stators 11a, 11a, 11a... in plan view.
1b, 11b, 11c... are fixedly arranged.
Here, the secondary conductor 12a and the primary stator 11
a, 11a, 11a..., respectively, to have required gaps 13a, 13a, 13a..., and similarly, between the secondary side conductor 12b and the primary side stator 11b, 11b, 11b... are the required gaps or gaps 13b and 13, respectively.
b, 13b... As is well known, suitable conductive materials for the secondary conductors 12a and 12b include copper and aluminum plates.

Next, the posture correction device 20 is provided near the peripheral edge 3 of the motive pulley 1 in the illustrated case.

Annular flat rolling surfaces 6a and 6b are formed on the upper and lower surfaces of the driving pulley 1, respectively, at a position at a radius R2 from the shaft ₂ of the driving pulley 1. Next, on the fixed side, at a position of radius R ₂ from the center of the shaft 2, a plurality of rolling devices 21a, 21a, 21a are provided at equal radial intervals from the center of the shaft 2, corresponding to the rolling surface 6a.
...is arranged. In exactly the same way, the rolling device 2 is also placed on the lower surface side of the motive pulley 1 at a radius R ₂ from the center of the shaft 2.
A plurality of other rolling devices 21b, 21 are located opposite the positions overlapping each other with 1a, 21a, 21a...
b, 21b, etc. are arranged. Rolling device 21
a, 21a... and 21b, 21b... all have the same configuration, so one rolling device 21a shown in FIG. 2 will be explained here. pin 23
The bracket 22a is fixed at a fixed position, such as the frame of a driving pulley. Other rolling devices, 21a, 21a, ... and 21b, 21b,
21b... also have a completely equivalent configuration. Here, the rollers 24a, 24a...24b, 24b are adapted to roll substantially in contact with the rolling surface 6a or 6b to correct the floating rotation of the drive pulley 1, or to correct the floating rotation of the driving pulley 1, or to contact the rolling surface 6a or 6b, respectively. When there is a risk that the motive pulley 1 may cause floating rotation, or when the floating rotation exceeds an allowable range, the motive pulley 1 is installed so as to make rolling contact and correct the posture of the motive pulley 1 by keeping a small gap between them.

Here, rollers 24a, 24a...24b, 24b
Metal wheels may be used for this, but in order to avoid noise generation when rolling in contact with the rolling surfaces 6a or 6b, it is preferable to use wheels made of nylon resin, polyurethane resin, etc., which have abrasion resistance. .

Of course, among the motive pulleys used in the present invention, a motive tension pulley having a motive force and tension function can also be applied as a motive pulley in a broad sense.

In the representative configuration, the respective primary stators 11a, 11a, 11a, ... 11b, 11
When electricity is applied to b, 11b..., a thrust is generated by the action of a known linear motor, so the motive pulley 1 pivots and rolls around the shaft 2, and the cable 5 wound around the peripheral edge 3 is driven. The cableway transporter will be operated.

In such a drive, the primary stators 11a, 11a..., 11b, 11b of the linear motor 10
..., the air gap 13a, 13a, 13a..., 13b, 13b, between the secondary conductor 12a or 12b,
As is known, it is particularly necessary that 13b... be within a certain required range. In addition, in the configuration of a double-sided linear motor such as the present configuration, when electricity is applied and driving is performed, the gap 13a and the gap 13b are balanced so as to be equal due to the self-balancing effect, so that the driving pulley 1 is There is a tendency to be located in the center of one primary side stator 11a, 11a, 11a... and the other primary side stator 11b, 11b, 11b....

However, the motive pulley used for the cableway requires a large diameter corresponding to the diameter of the cable 5, and pulleys of 3 to 4 m or more are also used, but such large diameter pulleys are extremely uniform. It is difficult to maintain high accuracy. In addition, in a horizontal pulley like this one, the periphery 3 moves from the center of the shaft 2 due to the weight.
To put it more exaggeratedly, there is a tendency for the shaft 2 and the bearings to undergo a drooping deformation due to their own weight, or when the shaft 2 and bearings are worn out due to long-term use, these factors combine to cause the rotation of the drive pulley. Misosuri Movement”
Alternatively, a floating movement similar to a "top movement" may occur. Of course, the extent of this is relatively small, so it is acceptable for the original purpose of driving the cable 5, but the exact gap 13a, 13a, . . . , 13 in the case of driving the linear motor 10 is
b, 13b... There is a possibility that the dimensions cannot be maintained and the predetermined drive characteristics of the linear motor 10 cannot be obtained.

Here, in this configuration, the rollers 24a, 24
a..., 24b, 24b... roll along the rolling surface 6a or 6b, respectively, to correct the attitude of the motive pulley 1, correct the above-mentioned floating movement, and maintain the horizontal attitude, so that the gaps 13a, 13a... , 13b, 13
b is kept constant, so that driving of the motive pulley by the linear motor 10 is achieved stably and with characteristics as planned.

[Other Examples]

Other embodiments will be described based on the typical configuration described above.

As another embodiment, instead of the driving pulley 1 having a horizontal position and the shaft 2 having a rigid shaft structure,
It is also possible to have the motive pulley 1 in a vertical position and the shaft 2 in a horizontal axis configuration, that is, the second illustration is viewed rotated by 90°. In this case, compared to the above case, the motive pulley 1 is not deformed by gravity, so
Although the occurrence of floating rotation is less than in the above case, it can be used in the same way in that the gaps 13a, 13a, . . . , 13b, 13b are maintained constant.

Next, as another example 2, a case will be described in which the single-type linear motor shown in the third figure is used. It is well known that both double-sided and single-sided linear motors are used, but this configuration is also possible when used to drive a motive pulley, depending on the required driving thrust.

A driving pulley 31 is horizontally supported on a shaft 32, which is a rigid shaft. A secondary conductor 42 of a linear motor 40 is attached to the lower surface of the driving pulley 31 in an annular shape, and correspondingly, a plurality of primary stators 41, 41, . . . are mounted at fixed positions 55 at equal radial intervals. It is arranged. Further, a flat annular rolling surface 36 is formed on the lower surface of the driving pulley 31, and correspondingly, rollers 54 are provided at fixed positions 55, which are pivotally connected by shaft pins 53 fixed to the respective brackets 52. A plurality of rolling devices 51,
51 are arranged at equal intervals radially around the shaft 32, and the respective rollers 54, 54, 54, . . . roll on and support the rolling surface 36.

In the case of the configuration of this embodiment, in addition to the floating rotation of the driving pulley that occurs in the case of the above-mentioned typical configuration, since the linear motor 40 is of one-sided type, the primary side stators 41, 41, . . . The suction force acts between the conductor 42 and the secondary conductor 42, making it more difficult to maintain the gap 43. However, in the posture correction device 50 of this configuration, the rolling surface is fixed by the rollers 54, 54... 36 is rolled and supported, thereby maintaining the horizontal posture of the motive pulley 31 and ensuring the gaps 43, 43, . . . accurately.

〔Effect of the invention〕

By using the configuration of the present invention, whether the motive pulley is used in a horizontal position or a vertical position, or whether a double-sided or one-sided linear motor system is adopted. , it is possible to always maintain a constant posture without causing floating rotation of the motive pulley. Therefore, the required value of the air gap, which is important in linear motor drive, can be maintained accurately.

This makes it possible to use linear motor drive even in large-diameter cableway pulleys, and this allows for quiet operation of the linear motor type, which does not have the noise and vibration inherent in conventional gear reduction type, and reduces the number of component parts. It is possible to enjoy the effect of being able to employ a small number of driving devices.

Furthermore, if the rollers of the rolling device of this configuration are made of a resin material as described above, quiet operation can be performed without any rolling noise of the rollers.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a linear motor type driving device for a cableway according to the present invention, FIG. 2 is a side view showing a partially sectional view of the linear motor type driving device for a cableway according to the present invention, and FIG. 3 is a plan view of a linear motor type driving device for a cableway according to the present invention. FIG. 3 is a partially sectional side view showing another embodiment of a linear motor driving device for a cableway. DESCRIPTION OF SYMBOLS 1... Driving pulley, 2... Shaft, 3... Periphery, 4... Rubber liner, 5... Cable, 6a, 6b... Rolling surface, 7... Bearing, 8... Hole, 10... Linear motor, 11a, 11
b...Primary side stator, 12a, 12b...Secondary side conductor, 13a, 13b...Gap, 14a, 14b...Fixed position, 20...Posture correction device, 21a, 21b...
Rolling device, 22a, 22b...Bracket, 23
a, 23b...shaft pin, 24a, 24b...roller,
25a, 25b...Fixed position, 31...Motive pulley, 3
2...Shaft, 33...Periphery, 34...Rubber liner, 35
... Cable, 36... Rolling surface, 37... Bearing, 38... Hole,
40...Linear motor, 41...Primary side stator, 4
2...Secondary side conductor, 43...Gap, 44...Fixed position,
50... Posture correction device, 51... Rolling device, 52... Bracket, 53... Shaft pin, 54... Roller, 55...
Fixed position, R ₁ , R ₂ ...radius.

Claims (1)

[Claims] 1. In a cableway driving device that winds a cable around the periphery of a driving pulley and rotates around an axis position to drive the cable, the driving pulley has a secondary conductor having an annular shape concentric with the shaft. At the same time, a linear motor is provided on the fixed position side with a primary stator disposed opposite to the secondary conductor and separated by a predetermined gap; A posture correcting device comprising a rolling surface having a ring shape, and a plurality of rolling devices having rollers pivotally connected to the rolling surface in correspondence with the rolling surface on the fixed position side. The drive pulley is rotated by the thrust of the linear motor, and the rollers of the rolling device roll and support the rolling surface, thereby causing the linear motor to rotate. A cableway linear motor drive device designed to maintain the required air gap.