JPH0688535B2 - Braking device for cableway pulley - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a braking device such as a driving pulley of a cableway for suspension such as a chair lift or a gondola lift installed in a ski resort or the like.

<Prior Art> In recent years, ski lifts have been operated at high speed to improve efficiency.

Further, even lifts have become one-seater two-person or three- or four-seater conventional.

Therefore, a braking device such as a drive pulley of a cableway for suspending them is required to be reliable, safe, and have a small impact during braking.

4 to 6 show an inner expansion type braking device as a first conventional example, in which reference numeral 1 denotes a frame, and a drive shaft 2 perpendicular to a bearing provided in the frame 1 is provided. It is rotatably supported, and the drive shaft 2 is driven by drive means 3 attached to the frame 1. Reference numeral 4 denotes a pulley fixed to the lower end of the drive shaft 2 on which a braking wheel 5 is concentrically fixed.

In FIG. 4, reference numeral 6 denotes a pair of left and right brake shoes, each of which has a friction material 7 on the outside. One end of each of the brake shoes 6 is rotatably connected to each end of a connecting member 8 by a pin. The other end of 6 is rotatably connected to each end of a pair of left and right links 9 by a pin.

The inner end of each link 9 is rotatably connected to a connecting piece 10 by a pin, and the connecting piece 10 is connected to a piston rod of a spring-actuated hydraulic release type cylinder 11.

The pulley 4 has a groove 12 at the upper outer periphery thereof, a wire 13 is locked in the groove 12, and a plurality of protruding pieces are provided above and below the outer periphery of the pulley 4.
By providing steady rings 16 and 17 supported by 14,15,
The upper end of the arm 19 of the carrier 18 fixed to the wire 13 is used as a steady rest.

As a second conventional example similar to the first conventional example, a braking device disclosed in Japanese Utility Model Publication No. 35-28614 is known. The braking device winds a braking band from the outer diameter direction of a braking wheel that rotates horizontally on the vertical axis and tightens the braking band to brake the braking wheel.

On the other hand, FIGS. 7 to 9 show a third conventional example, in which a horizontal braking disk 21 is concentrically fixed to the upper surface of the pulley 4, and the peripheral edge thereof is projected from the peripheral surface of the pulley 4.

Then, the disc is attached to the bracket 22 provided on the frame 1.
A frame 23 that surrounds the upper and lower sides of the frame 21 is fixed, a spring-operated hydraulic release type cylinder 24 is fixed to the lower part of the frame 23, and a brake pad 26 at the upper end of the piston rod protruding from above and the lower surface of the upper piece of the frame 23 are fixed. It is a disc brake type in which the upper and lower surfaces of the disc 21 are sandwiched by a brake pad 27 fixed to.

As a fourth conventional example similar to the third conventional example, there is an example disk of a reverse rotation detection safety device for a cableway pulley and a direct-coupling brake disclosed in Japanese Utility Model Laid-Open No. Sho 59-36534. This conventional structure is
A horizontally arranged braking wheel (disk) is concentric with the cableway pulley but has a disc shape.
Is for pressing the brake wheel from above and below. This is exactly the same structure as the third conventional example of the present application.

<Problems to be Solved by the Invention> In the first conventional example (FIGS. 4 to 6), the inner expansion type using the brake shoe 6 is a horizontal pulley 4
On the other hand, since the braking surface of the braking wheel 5 is vertical, it does not easily accumulate even when snow is applied, so there is little effect on the braking operation, and the water generated by snow melting does not easily flow into the portion of the braking wheel 5. If even a small amount of water is included, the temperature falls below freezing in a braking state, and when the brake shoe 6 adheres to the braking wheel 5 due to freezing, the contact area is large and it is difficult to separate.

Also, there is an initial impact during braking, which makes the ride comfort such as a lift worse. It has to be designed and manufactured according to the size of the pulley each time, and the structure is complicated and large, and it is difficult to carry it from the factory to the site.

Also, in the second conventional example (Jitsuko 35-28614),
Since the inner surface of the braking zone is always in contact with the outer surface of the braking wheel, it seems that the adverse effect on the braking operation during snowfall is small at first glance. However, during snow melting, the water content of the melted snow is likely to enter the gap between the braking wheel and the braking zone, and the water content once entering due to the capillary phenomenon does not flow down and remains in the gap. If it freezes in cold weather, it is difficult to shift from the braking state to the braking release state because the contact area between the braking wheel and the braking zone is large. In other words, the ice layer between the braking wheel and the braking zone acts like an adhesive to stop the rotation of the braking wheel, or if the braking wheel is forced to rotate, the braking zone will be broken and the safety There is a risk of driving problems.

Furthermore, since the frozen layer is sandwiched between the braking wheel 2 and the braking band, it hardly melts. As a result, this conventional example is similar to the one in which the brake element, which is close to the entire circumference, is pressed from the inner side to the outer side of the brake wheel described in FIGS. 4 to 6 above.

On the other hand, in the disc brake type (FIGS. 7 to 9) of the third conventional example, since the braking disc 21 is horizontal, snow is likely to accumulate and the brake operation is adversely affected, and the snowmelt water is likely to flow in, causing a failure. This may cause snowmelt water to freeze and rise, making it impossible to brake.

Further, also in the device according to the fourth embodiment (Japanese Utility Model Publication No. 59-36534), since the upper and lower surfaces of the disk and the friction surfaces of the sliding pieces are all horizontal surfaces, the upper surface of the disk and the lower surface of the disk are covered during snowfall. Snow accumulates on the friction surfaces of the sliding pieces, slipping occurs between the disc and the sliding pieces, and the adverse effect of brake operation due to snowfall cannot be avoided.

In addition, during snow melting, the water content of the melted snow accumulates on the upper surface of the horizontal disk and the upper surface of the lower sliding piece, and when the water content adhering to these horizontal surfaces freezes, swelling ice blocks are likely to occur. For this reason, there is a risk that the ice pieces will not be able to pass through the gap between the sliding piece and the disk when the disk rotates, and the sliding piece may be destroyed.

The present invention has been made to solve the above conventional problems, and an object of the present invention is to provide a braking device for a cableway pulley that can sufficiently exert a braking effect even during snowfall or snowmelt.

<Means for Solving the Problem> The present invention is to fix a brake wheel of a tray-shaped outer edge portion coaxially with a pulley for a cableway that horizontally rotates on a vertical axis, and the brake wheel is a side surface of the pulley for a cableway. Has a vertical inner surface and a vertical outer surface. On the other hand, the pair of left and right spot type brake elements are arranged on both sides of the brake wheel with a part of the brake wheel interposed therebetween, and have vertical friction surfaces facing the vertical inner and outer surfaces of the brake wheel. The brake element is movable by a braking member toward and away from the brake wheel, and the vertical friction surface is pressed against the vertical inner and outer surfaces.

<Operation> According to the present invention, when the brake is not applied, the braking element is separated from the braking wheel fixed to the side surface of the pulley, so the pulley rotates together with the braking wheel, and the wire wound around the pulley moves the carrier. I am letting you. When braking is applied from this state, the vertical friction surface of the brake element sandwiches both the vertical inner surface and the vertical outer surface of the braking wheel, and stops the rotation of the pulley together with the braking wheel.

Here, since the friction surface of the brake element and the inner and outer surfaces of the braking wheel are all vertical surfaces, there is no accumulation of snow on each vertical surface even during snowfall, and even if the snow melts, the water content on each vertical surface is different. run down. Therefore, even if the moisture adhering to the vertical surface freezes, no large frozen block is formed,
There is no risk of hindering the transition from the braking state to the braking release state or vice versa.

<Embodiment> In the embodiment shown in FIGS. 1 to 3, reference numeral 31 denotes a frame, and a bearing provided on the frame 31 rotatably supports a vertical drive shaft 32, and the drive shaft 32 is It is driven by drive means 33 attached to the frame 31.

Reference numeral 34 denotes a pulley fixed to the lower end of the drive shaft 32, on which the braking wheel 35 at the outer edge of the tray is fixed concentrically.

Reference numeral 36 denotes a bracket provided on the frame 31, and a frame 37 surrounding the inner and outer surfaces of the braking wheel 35 is attached to the bracket 36 so that the frame 37 can be moved slightly inward and outward, and a spring-actuated hydraulic release cylinder 38 is provided outside the frame 37. Fixed, spot contact type brake 40 at the end of piston rod 39 protruding from the inner end
Then, the spot contact type braking element 41 fixed to the inside of the frame 37 serves to sandwich the vertical inner surface 35a and the vertical outer surface 35b of the braking wheel 35 for braking.

Fig. 3 shows the details of the cylinder 38. 42 is a piston, 43 is a spring for braking, and the open cylinder 38
When the oil pressure is removed from the
The vertical friction surface 40a of the above is pressure-bonded to the vertical inner surface 35b of the braking wheel 35, and the frame 37 is slightly moved by the reaction force, and the vertical friction surface 41a of the inner brake element 41 is pressure-bonded to the vertical outer surface 35a of the braking wheel 35. Performs braking action.

Here, the inner and outer surfaces 35a, 35b of the braking wheel 35 and the brake element 40,
The friction surfaces 40a, 41a of 41 are all perpendicular to the side surface (horizontal surface) 34a of the pulley 34, so that snow does not collect during snowfall, and snowmelt water flows down.

When releasing the braking, the hydraulic pressure is sent to the rod-side chamber of the open cylinder 38, whereby the piston rod 39 moves backward and the braking elements 40 and 41 release the braking of the braking wheel 35.

The pulley 34 has a groove 44 in the upper outer periphery thereof, and a wire 45 is locked in the groove 44, and a plurality of protruding pieces are provided above and below the outer periphery of the pulley 34.
By providing steady rest rings 48 and 49 supported by 46 and 47,
The arm 51 of the carrier 50 fixed to the wire 45 is used as a steady rest.

According to the above configuration, the braking wheel of the tray-shaped outer edge portion is formed on the side surface of the pulley 34.
When 35 is fixed concentrically and the pulley is installed horizontally, the inner and outer surfaces 35a and 35b of the braking wheel 35 are vertical. Moreover, since the vertical friction surfaces 40a, 41a of the spot contact type brake elements 40, 41 are arranged so as to face the vertical inner and outer surfaces 35a, 35b of the braking wheel 35, the following effects are produced.

Vertical surfaces 4 of the brake elements 40, 41 and the brake wheels 35 during snowfall
Snow does not accumulate on 0a, 41a; 35a, 35b, and the adverse effect of brake operation due to snowfall such as slip is small.

When the snow melts, the water content of the melted snow is
Since they flow down a, 41a; 35a, 35b respectively, the amount of water adhering to those vertical surfaces is extremely small. Therefore, even if it freezes, the frozen lumps are fine particles and are large enough to pass through the gap between the brake elements 40, 41 and the brake wheel 35.
There is no risk that 40, 41 will be destroyed by collision with ice blocks.

As a result, the braking effect during snowfall or snowmelt can be sufficiently exerted.

Further, since it is a kind of disc brake, it has less impact during braking as compared with the conventional inward expansion type brake. In addition, the structure is simple, manufacturing and assembly are easy, and the steady rest of the carrier is easy to attach, which reduces the manufacturing cost.
It is also easy to carry in from the factory.

Although three sets of braking members 52 are shown in this embodiment,
Of course, any number of sets such as one set or four sets can be used. Further, since the braking member 52 can be easily increased / decreased in accordance with the size of the lift, it is not necessary to redesign the size of the lift, which is advantageous in practical use.

<Effects of the Invention> As described above, according to the present invention, the vertical friction surfaces of the spot contact type brake element are arranged to face each other on both the vertical outer surface and the vertical inner surface of the brake wheel in the tray-shaped outer peripheral portion. There is no accumulation of snow between the two, and even if freezing or the like occurs due to the melting of the snow, it does not hinder braking release, so that the braking effect is sufficiently exerted.

[Brief description of drawings]

FIG. 1 is a plan view showing a frame as seen through an embodiment of the device of the present invention, FIG. 2 is a side view of the same as above, FIG. 3 is an enlarged vertical sectional view of the cylinder portion, and FIG. FIG. 5 is a side view of the same type of brake as seen through, FIG. 5 is a side view of the same as above, FIG. 6 is an enlarged vertical side face of the same as above, and FIG. 7 is a plan view of another conventional frame seen through. FIG. 8 is a side view of the same as above, and FIG. 9 is an enlarged vertical side view of a main part of the same. 31 …… Frame, 34 …… Cableway pulley 35 …… Brake wheel, 35a …… Vertical inner surface 35b …… Vertical outer surface, 36 …… Bracket 37 …… Frame, 38 …… Open cylinder 40,41 …… Brake, 40a, 41a …… Vertical friction surface, 52 …… Brake member

Claims (1)

[Claims] 1. A cableway pulley 34 which horizontally rotates on a vertical axis,
The side of the pulley 34 is fixed coaxially with the cable pulley 34.
A braking wheel 35 having a tray-shaped outer edge having a vertical inner surface 35a and a vertical outer surface 35b with respect to 34a, and a vertical inner surface 35a and a vertical outer surface of the braking wheel 35 disposed on both sides of the braking wheel 35 with a part of the braking wheel 35 sandwiched therebetween. A pair of left and right spot contact type braking elements 40, 41 having vertical friction surfaces 40a and 41a facing 35b;
And a braking member 52 that pushes the vertical friction surfaces 40a, 41a of the brake elements 40, 41 individually against the vertical inner surface 35a and the vertical outer surface 35b of the braking wheel 35 by moving back and forth toward the braking wheel 35. A characteristic device for moving pulleys for cableways.