JP4532307B2 - Cableway Saddle - Google Patents

Description

  The present invention relates to a cable saddle installed to support the cable and the cable in a track in a cableway facility that operates by pulling a carrier that runs on the cable with a cable.

  Conventionally, as a method of cableway, a carrier is suspended on a support line that is a stationary cable stretched between the stops at both ends, and this carrier is circulated between both stops and connected to a cable that is stretched between the stops. In addition, there is a double-track cableway in which a carrier is operated along the support line by driving the cable. As a cableway of this type, there is a crossing type cableway generally called a ropeway, but in addition to this, a transporter is routed at a low speed in the stop by connecting and disconnecting the transporter and the cable. There is a double-type automatic circulation type cableway.

  In a cableway using such a branch, if the geographical condition such as the interval between the stops at both ends is short or the distance from the lower part is sufficiently secured when the branch is stretched, It is possible to construct a track that supports the branch only at both stops. However, many cableway tracks usually have terrain undulations between the two stops, and the support line is suspended by its own weight between the supporting points and stretched in a concave shape. The track is constructed to support the support by standing up and maintaining a sufficient distance from the ground surface.

  Thus, in the cableway equipment having the support in the cableway, the branch is bent at the position of the support. Normally, a locked coil rope is used for the branch, and since this rope is stiff and difficult to bend, it cannot be bent rapidly. Moreover, there is a risk that a sharp bend will impair safety, such as floating when the carrier travels. Therefore, a support saddle for supporting the support so that the support is supported so that it is not bent in the lateral direction is installed on the support.

  The branch saddle is provided with a branch shoe having a semicircular groove that substantially matches the cross-sectional shape of the branch on the upper surface, and this branch shoe has an appropriate curvature with respect to the extension direction of the branch. It is curved. Accordingly, the support has a structure in which the movement in the left-right direction is restricted by being fitted and supported in the groove of the support shoe, and is gently bent in the front-rear direction. In general, the radius of curvature of the branch shoe is formed with a single radius of curvature in consideration of the centripetal acceleration when passing through the carrier, the surface pressure on the support surface of the branch, and the like.

  When the transporter passes over the support saddle configured in this way, centripetal acceleration is generated in the transporter as the support is bent, and a force acts in the direction of lifting from the support. Also, since the carrier is suspended so as to be swingable so as to be perpendicular to the inclination of the branch, the angle at which the carrier that has traveled at a substantially constant inclination angle in the track enters the branch saddle and travels is determined. When it changes, the speed of the traveling horizontal direction component changes, so that the forward / backward swing of the transporter is caused.

  To mitigate this increase in swaying and centripetal acceleration, it is only necessary to increase the radius of curvature of the branch saddle and loosen the branch, but this increases the total length of the branch saddle and Not. On the other hand, if the radius of curvature is reduced, the overall length can be shortened and it is economical. However, the centripetal acceleration acting on the transporter increases and the risk of the transporter floating up increases, and swinging in the longitudinal direction of the transporter increases. End up.

Patent Document 1 discloses a technical means for solving such a problem. In this document, the supporting shoe main body is configured by combining two kinds of curvature radii, the curvature radius of the central portion of the supporting shoe is increased, and the curvature radius is decreased at both ends.
JP 2002-145050 A

  The present invention has been made in view of the above-described circumstances, and reduces the swinging of the transporter in the front-rear direction when passing through the support column, and also reduces the centripetal acceleration acting on the transporter, so that the ride comfort and safety are improved. The objective is to provide a support saddle that can improve the performance.

  Corresponding to this problem, the present invention relates to a saddle for saddle provided on a support post in a cableway to support the branch, and the radius of curvature of the branch shoe supporting the branch at the upper part of the branch saddle is increased. The fixed saddle central section is formed with a single radius of curvature, and is formed with a relaxation curve in which the radius of curvature gradually increases from the central portion toward both ends. Yes.

  With this configuration, the radius of curvature of the support increases smoothly due to the relaxation curve from both ends of the support saddle toward the center, so that the centripetal acceleration acting on the carrier entering or leaving the support saddle However, the transporter can move safely and stably. Similarly, the speed change of the horizontal component of the carrier at this time also becomes gentle, which contributes to improving the riding comfort.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 3 is a front view showing a track of a double track cableway. In the figure, a branch 3 is stretched between the foot-side stop 1 and the summit-side stop 2, and a support column 4 is erected to support the drooping of the branch 3 at an almost intermediate position. Yes. In parallel with the branch 3, the cable 5 is circulated and stretched between the two stops, and is driven by a driving device provided in one of the stops so as to circulate in the line. Yes.

  The carrying device 6 includes a traveling machine 7 that travels along the support line 3 with traveling wheels, and a passenger car 8 that is pivotally attached to the traveling machine 7 so as to be swingable in the front-rear direction. Regardless of the inclination of the traveling machine 7, it is suspended in the vertical direction. The cable 5 is connected to the traveling machine 7, and as the cable 5 is driven and moved, the transporter 6 moves in the track, and thus the cableway is operated.

  A support saddle is attached to the upper portion of the support column 4, and the support 3 is supported by the support saddle. FIG. 1 is a front view of the support saddle 10. The support saddle 10 is fixed on a plurality of support arms 11 extending from the support 4 body, and the upper portion supports the support 3 with a gentle curve. The support saddle 10 is provided with a plurality of receiving rings 12 and supports the cable 5 so that it can move.

  FIG. 2 is a cross-sectional side view of the support saddle 10. The upper part of the branch saddle 10 has a U-shape opened upward, and a branch shoe 13 is fitted therein. An arcuate groove is formed at the center of the upper portion of the branch shoe 13, and the arc portion on the lower surface of the branch 3 is fitted and supported in this groove. The support shoe 13 is made of nylon resin or soft metal having a low friction coefficient and excellent wear resistance, and the support 3 can slide in the extending direction. On the other hand, a receiving ring frame 14 protrudes from the lower side of the left and right support saddles 10 toward the inside of each other, and the receiving ring 12 is rotatably mounted on the receiving ring frame 14. Thus, the cable 5 is supported so as to be movable.

  As shown in FIG. 1, the support shoe 13 includes a section A, a section B, and a section C, and the support surface of the support 3 is composed of curves with different curvatures. First, the section B in the central part is composed of a single curve having a constant curvature, and the radius of curvature in this section is the surface pressure generated between the support 3 and the support shoe 13 or when the carrier 6 passes. It is determined in consideration of the centripetal acceleration and the like. Next, the section A and the section B on both sides of the section B are constituted by relaxation curves in which the curvature decreases from the curvature of the single curve of the section B toward both ends of the branch saddle 10. For this relaxation curve, a clothoid curve whose curvature is proportional to the curve length, a remnant skate curve proportional to the chord length, a three-dimensional parabola, etc. can be applied, and a curve approximating these curves can also be applied. it can.

で表され、そのときの接触角ψは微少区間ｄｓとｄψに対して

であるから（１）式及び（２）式より

となり、これを積分しｓ＝０のときψ＝０であるから

となる。 Hereinafter, an example of approximating a clothoid curve with a double-centered curve that is a set of partial circles will be shown. Figure 4 is a graph showing a clothoid curve for connecting to a single curve radius of curvature R _0. In the figure, assuming that the radius of curvature in the clothoid curve is ρ, the length of the clothoid curve is L ₀ , and the length of the curve to any point on the clothoid curve is s, the radius of curvature 1 / ρ is

The contact angle ψ at that time is relative to the minute sections ds and dψ.

Therefore, from formulas (1) and (2)

Since this is integrated and s = 0, ψ = 0.

It becomes.

であり、また、ここから曲線長を区間ａ延長した曲線長Ｌ＋ａの位置での接触角ψ_ａは、

で表される。よって、区間ａでの挟角θは

となる。ここで、挟角θ間の円弧の曲率半径をＲ_ａとすると

したがって、

となり、複心円の曲率半径Ｒ_ａは、区間ａの中央におけるクロソイド曲線の曲率半径に一致する。 Next, in FIG. 5, the clothoid curve shown as curve length L ₀ in the single curve R _0, the contact angle [psi _b at the position of the curve length L,

Further, the contact angle ψ _a at the position of the curve length L + a obtained by extending the curve length from the section a from here is:

It is represented by Therefore, the included angle θ in the section a is

It becomes. Here, if the arc of the radius of curvature of between included angle θ and R _a

Therefore,

Next, the radius of curvature R _a of the multi-centered circle corresponds to the radius of curvature of the clothoid curve in the middle of the interval a.

From this, if the curve length section a is set (for example, 1.0 m), the relaxation curve length L ₀ can be replaced with a set of L ₀ / a arcs of curvature radius Ra, approximating the clothoid curve, and adjacent to it. Since the combined arc has a common contact angle ψ, a continuous curve can be obtained at each joint point. And it is also possible to construct the relaxation curves of the section A and the section C of the support shoe 13 using the curves approximated in this way.

  In the above description, the equation is expanded so as to approximate the clothoid curve, but the Remnis skate curve and the three-dimensional parabola can be expanded in the same manner.

  FIG. 6 shows an example of the curve of the support shoe 13 to which the relaxation curve is applied. The central section B of the support shoe curve 20 is formed by a single-curved arc having a curvature radius R0. The section A extending from the section B to the left in the drawing is divided into sections a1, a2, a3, and a4, and a multicenter curve that continuously connects the curvature radii of the sections as R1, R2, R3, and R4. There is no. These curvature radii are in a relation of increasing toward the tip (R0 <R1 <R2 <R3 <R4). On the other hand, the section C extending in the right direction of the section B is configured similarly to the section A. That is, the section C is divided into sections a5, a6, a7, and a8, and forms a multi-core curve that continuously connects the curvature radii of the sections as R5, R6, R7, and R8. The relationship increases in the direction of the tip (R0 <R5 <R6 <R7 <R8).

  The support 3 is supported by the support shoe 13 configured as described above, and is bent along the support shoe curve 20 described above. Then, the carrier 6 that has traveled on the support 3 travels along the support shoe curve 20 of the support shoe 13 when passing through the support column 4. In this case, the bending of the branch line 13 is substantially the same as the inclination angle of the branch line 3 in the track at the tip of the branch saddle 10, and the arc gradually decreases in radius from both ends toward the center. Since it bends, the centripetal acceleration acting on the transporter 6 passing through it and the speed change in the horizontal direction are not abruptly caused, and the lift of the transporter 6 and the shaking in the front-rear direction can be suitably mitigated.

Front view of a supporting saddle Side view of a branch saddle Front view showing cableway Explanatory drawing showing clothoid curve Explanatory drawing showing clothoid curve Explanatory drawing showing curve of support shoe

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Foothill side stop 2 Mountaintop side stop 3 Auxiliary 4 Strut 5 Erect 6 Carrying device 7 Traveling machine 8 Passenger car 10 Reaching saddle 11 Strut arm 12 Receiving ring 13 Retracting shoe 14 Receiving ring frame 20 Reaching shoe curve A, B, C section

Claims (1)

  In the saddle for saddle installed on the strut in the cableway to support the branch, the radius of curvature of the branch shoe supporting the branch at the upper part of the branch saddle is defined as a certain section in the center of the branch saddle. A branch saddle for a cableway formed by a relaxation curve formed with a single radius of curvature and gradually increasing in radius of curvature from the center to both ends.

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