JPH019732Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cable movement amount detection device for a cableway pulley.

In cableways, in order to control or control the operation of equipment, it is often necessary to understand this in relation to the amount of movement of the operating cable.

For example, in the case of an automatic circulation type cableway, there are the following cases.

In an automatic circulation cableway, the carriers are attached to and detached from the cables, so due to security requirements, a device is installed that prevents the carriers from departing if the distance between the carriers is less than the minimum allowable interval. for,
It is necessary to operate the device by detecting the amount of cable movement since the preceding carrier departs, that is, the length of the cable sent out. (For example, JP-A No. 56-25048 ``Carrier departure control device for automatic circulation cableway'').

Alternatively, on an automatic circulation cableway, when the rope gripping machine of the carrier grips the cable and departs, fixed points A and B are set in the departure section to check whether normal rope gripping force is being generated. A device is installed to provide resistance to the progress of the rope gripping machine within this point A to B section, and if there is a delay in the progress of the rope grasping machine from one point on the cable between points A and B, the rope is stopped. In some cases, there is a relative slip between the rope and the rope gripping device, and a device is used that determines that the rope gripping force is poor and prevents the carrier from starting. It is necessary to detect the amount of movement and operate the device. (For example, ``Method for detecting poor grip strength of cableway'' (Japanese Patent Application Laid-Open No. 1983-94864) related to a patent application filed on October 28, 1982 by the same applicant as the present application.
(Refer to Japanese Patent Application Laid-open No. 1983-94863), and the same "device for detecting cableway gripping force failure" (Refer to Japanese Patent Application Laid-Open No. 60-94863).

Furthermore, in an automatic circulation cableway, the departure of a carrier, the presence or absence of a carrier passenger, and the signal from a cable movement detection device are input into a computing unit to monitor the momentary progress of the cableway on a cableway. Although a device may be used to visually indicate the location and presence or absence of passengers, a device for detecting the amount of cable movement is also required in this case. (For example, Utility Model 57-98967
No. ``Carrier indicator for automatic circulation cableway'').

In addition to these examples, the amount of cable movement can be detected by
Not only in the case of automatic circulation cableways, but also in fixed circulation cableways and intersecting cableways, there is some kind of control, control, operation, etc. in synchronization with the movement of the cables.
This is always necessary when displaying signs, etc.

When detecting the amount of cable movement for this purpose, at some point before today, it was common for cableways to operate at a single speed; After reaching constant speed, excluding transient periods such as braking, the elapsed time and the amount of cable movement are directly proportional, so if you measure the time with a timer etc., the amount of cable movement is uniquely determined, and the above-mentioned This was considered sufficient for the operation of such devices and was put into practice.

However, in recent years, equipment that allows the operating speed of cableways to be changed steplessly or in multiple stages has come into widespread use, allowing operators to select the required operating speed depending on weather conditions and other requirements. Because of this, the proportional relationship between the amount of cable movement and the elapsed time cannot be guaranteed, and it is no longer possible to measure the amount of cable movement by timing.Therefore, it is necessary to capture the amount of cable movement itself. sexuality is increasing.

Conventionally, the following methods and devices have been used to detect the amount of movement of the cable.

The first method is to apply a method or device that is commonly used to measure the amount of movement of a long moving object or the traveling distance of a moving object such as a vehicle. The peripheral edge of the roller is brought into contact with the roller, the roller is rotated, the number of rotations is obtained, and this is multiplied by the circumferential length of the roller to detect the amount of cable movement. This device has the advantage of being easily installed at any location through which the cable passes, but has the disadvantage of large errors. That is, since the contact between the roller and the cable is relatively light, there is slippage on the contact surface, which causes a delay in the tracking of the roller, and if this is accumulated over a large number of times, it will result in an error. In addition, since the rollers have a relatively small diameter, the rollers and cables repeatedly come into contact with each other many times, and are therefore prone to wear due to continued use.When wear occurs, the roller diameter may change, resulting in errors. .

The second method is to obtain the rotation speed or rotation angle from a large-diameter pulley installed at the cableway terminal, such as a driving pulley, tension pulley, or turning pulley, and then multiply this by the circumference length or arc length. This detects the amount of cable movement. In the case of this method or device, the cables are wrapped around these pulleys with a sufficient wrap angle, so the contact angle is sufficiently large, and a large tension is applied to the cables. There is almost no slip between the cable and the periphery of the pulley, and even if the periphery of the pulley is worn, the pulley diameter is large, so the rate of change in the pulley diameter is small, and therefore there is an advantage of less error.

For these reasons, methods and devices using pulleys are often put into practice, for example, with a specific configuration as shown in FIG.

In FIGS. 1a and 1b, the pulley 2 is pivotally connected to the shaft 3 so as to rotate, and the cable 1 is attached to the pulley 2.
It is wrapped around the rim. A plurality of detection pieces are arranged and fixed at equal angles radially from the center of the shaft 3 near the inner circumference of the pulley 2. In the case of this figure, there are 8 detection pieces.
It has detection pieces 4a, 4b...4h. Detectors 5 are arranged at fixed positions corresponding to these detection pieces 4a, 4b, . . . , 4h. For example, a proximity switch is used as the detector 5, and a gap 6 is ensured when any of the detection pieces 4a, 4b, 4c, . . . , 4h passes near the detector 5.
In such a device, when the pulley 2 rotates in the direction of the arrow 7 with the movement of the cable 1, the detection piece 4
a, 4b, . . . 4h successively pass near the detector 5, and the detector 5 detects this and emits a pulse signal. By counting this pulse signal with a counter and multiplying it by the arc length of the pulley periphery corresponding to the detection piece interval, it is possible to detect the sending length of the cable.

In addition, the pulley has arms or reinforcing rims 8a and 8b, as shown in Figure 2a and b, due to the need for strength design of the pulley.
. . . 8h, so it is also possible to detect this with the detector 5 instead of the detection piece.

However, since pulleys used in cableway equipment generally have a large diameter, the plurality of operating pieces 4a, 4b
. . 4h, or the reinforcing rims 8a, 8b, . For example, as shown in FIG. 1 or FIG.
...In the case where there are 8 8h, assuming that the pulley diameter is 4m, there is
b) The length of the arc of the pulley 2 corresponding to the pitch between them is 4×π/8≒1.57m, which means that the amount of cable movement detected by one pulse generated by the detector 5 is 1.57m. This means that it is impossible to detect anything below the m-interval level.

Therefore, in order to detect the amount of cable movement at even closer intervals, it is obvious that the number of detection pieces should be increased to a large number and they should be arranged at closer intervals. It was troublesome and not a good idea to fix them in a radial manner. In addition, in the case of an arm-shaped pulley as shown in the second figure, the spaces 9a, 9b...9
In some cases, it was difficult to provide a large number of actuating pieces because of the large number of actuating pieces.

The present invention was made in order to eliminate such drawbacks, and the purpose is to provide a device that can precisely detect the amount of movement of a cable without disposing a large number of operating pieces on a pulley. It is something that

In response to this purpose, the present invention includes a pulley that wraps a cable around its periphery and rotates as the cable moves, and a plurality of n detection pieces arranged and fixed to the pulley at equal angles in a radial direction. , a plurality of m detectors disposed at fixed positions corresponding to the passage positions of the detection strips, and a counter, and each of the detectors has a corresponding detector position that can be adjusted to any one of the detection strips. When a vehicle passes by, it is detected and a pulse signal is output and input to the counter, and the counter counts the input pulse signal and when the counted value reaches a set value, outputs a signal and performs the necessary control for the operation of the cableway. A cable movement amount detecting device that performs
= 360°/n, the angle β° is β° = α/m, and N is a number that can be arbitrarily selected from the range O≦N≦(n-1), then the m detectors The i-th (1≦i≦m) detector starts from an arbitrarily determined reference position as θ0゜=O°, and calculates the phase angle in the direction in which the pulley rotates θi゜=N・α+(i-1) - The gist of the present invention is a cable movement amount detection device for a cableway pulley, which is characterized in that it is arranged at a position forming β.

EMBODIMENT OF THE INVENTION Hereinafter, the cable movement amount detection device for a cableway pulley according to the present invention will be explained with reference to the drawings.

In FIGS. 3a and 3b, the pulley 12 is pivotally connected to a shaft 13 and is rotatable. The cable 11 is introduced into the pulley 12 from one end 11a of the cableway line and the pulley 1
It is wrapped around the periphery of 2 and guided back, and is led into the cableway line again from the other end 11b.

Inside the periphery of the pulley 12, there are a plurality of n
Detection pieces 14a, 14b, . . . , 14h are arranged and fixed radially and divided at equal angles around the shaft 13. In this example, the case where n=8 is shown, so any two detection pieces (for example, one
The arrangement angle α of 4a and 14b) is α°=360°/8=45°.

Next, the pulley 12 moves along with the movement of the rope 11, and the arrow 1
7, the detection pieces 14a, 1
A plurality of detectors 15a, 15b, 15 corresponding to the positions that 4b...14h pass sequentially.
c is arranged at a fixed position so as to satisfy the relationship described below. In this embodiment, a case where m=3 is shown.

Here, when the arrangement angle of the above-described two arbitrary detection pieces (for example, 14a and 14b) is α, m
The detectors 15a, 15b, and 15c are arranged in parallel radially at equal intervals around the axis 13 so as to form an angle β° with each other, and the angle β° is β°=α°/m ∴β°= 360°/(n・m). Therefore, in this embodiment, since n=8 and m=3, β°=45°/3=15° or β°=360°/(8×3)=15°.

FIG. 3a shows m detectors 15a, 15b, 15c arranged side by side at fixed positions in this relationship. Detectors 15a, 15b, 1
For example, a proximity switch is used for 5c, and in this case, the positions of the detectors 15a, 15b, 15c are set by the detection piece 14.
a, 14b . . . 14h are arranged so that a gap 16 is secured in each case.

Next, these m detectors 15a, 15b, 1
5c indicates the respective detector positions with the detection pieces 14a,
14b...14h passes, it is detected and a pulse signal is output, and this pulse signal is transmitted to the counter C as shown in FIG. Which detector 15a, 15 is the counter C?
The pulse signals transmitted from the terminals b and 15c are all added and counted, and when the counted value reaches a preset value, a signal is output to operate the relay RY.

The operation of the device according to the present invention constructed in this way will be described next.

The pulley 12 rotates about a shaft 13 in the direction of an arrow 17, and the cable 11 moves together with the rotation of the pulley 12. Detection pieces 14a, 14b...14h are pulleys 12
As the light rotates, it passes the positions of the detectors 15a, 15b, and 15c one after another.

Now, when the counter C starts counting, the first detector 1 with the detection pieces 14a arranged in parallel
When passing the position 5a, the detector 15a
detects this, outputs a pulse signal, and transmits it to counter C.

Next, when the pulley 12 rotates β°=15° in the direction of the arrow 17, the detection piece 14a is moved to the second detector 15b arranged in parallel.
Since the detector 15b detects this and outputs a pulse signal, the counter C
to be transmitted.

When the pulley 12 rotates in the direction of the arrow 17 by β°=15° from the previous state, the detection piece 14a passes across the position of the third detector 15c arranged in parallel, so the detector 15c detects this. It detects it, outputs a pulse signal, and transmits it to counter C.

As a result, the pulley 12 is further moved in the direction of the arrow 17 by β°=
When rotated by 15 degrees, the detectors 15a and 15 are rotated as described above.
The detection piece 14a passed through the positions b and 15c one after another.
advances in the forward direction, and the next detection piece 14b passes the first detector 15a position, so the detector 1
5a detects this, generates a pulse signal, and transmits it to counter C. Thereafter, the detection piece 14b passes through the positions of the detectors 15b, 15c in this manner, and the next detection pieces 14c, 14d, . . . repeat the same operation.

No matter which detection piece passes which detector position, the corresponding detector outputs a pulse signal, so a pulse signal is input to the counter C every time the pulley 12 rotates β° = 15°. .

Cable movement amount L corresponding to one pitch of pulse signal
is obtained by L=(π・D)/(n・m), where D is the diameter of the pulley 12. For example, if the pulley diameter D=4 m, then in this example, L=(π× 4)/(8×3)≒0.524m, and for every pitch of the pulse signal, the cable 11 becomes L=
It has moved 0.524m.

Therefore, if the number of pulses corresponding to the amount of cable movement necessary for controlling, controlling, operating, or marking cableway equipment is set in the counter C, the counter C will add the pulse signals from any detector. and count it,
When the count value reaches a set value, an output signal is generated to operate the relay RY, allowing the electric circuit to perform a desired operation.

In the above-described one, the detectors 15a, 15b, and 15c are arranged side by side at an angle of β to each other.
If it is desired to select another arrangement relationship due to installation-related circumstances, the same effect will generally be obtained even if the equipment is installed so that the following relationship is satisfied.

Assuming that n detection pieces P ₁ , _{P 2} . Here, assuming that m detectors D ₁ , D ₂ ...D _n are used, the angle β゜=α゜/
Let it be m.

When arranging detectors under this assumption, the i-th (1≦i≦m) of m detectors
The detector is set at an arbitrarily determined reference position of 0°, and is placed at a phase angle of θi° in the direction of rotation of the pulley starting from the reference position. That is, θi゜=N・α+(i-1)・β. Here, N can be selected as any number within the range of 0≦N≦(n-1).

This relationship will be further explained using a specific numerical example with reference to FIG.

In this numerical example as well, n=8 and m=3, so α°=360°/8=45° and β°=45°/3=15°.

The positions of the first, second, and third detectors are determined using the equation for determining the phase angle θi°.

Here, first, the installation position of the first detector _D1 is determined as the reference position, and in order to set θi゜=0゜, the value of N is set to N=0, and θi゜=0×45゜+( 1-1) x 15° = 0°.

The installation position of the second detector D2 is arbitrarily selected as N=1, θ2° = 1 x 45° + (2-1) x 15° = 45° + 15° = 60°, and the reference position is 0°, that is, the phase angle is θ2°=60° from the first detector D1 in the direction of the arrow 27, which is the rotating direction of the pulley 22. The installation position of the third (m-th in this numerical example) detector D3 is arbitrarily selected as N=2, and θ3゜=2×45゜+(3-1)×15゜=90゜+30゜ = 120゜, and the reference position is 0゜, that is, the first detector D1
The pulley 22 is disposed at a phase angle of θ3°=120° in the rotating direction of the pulley 22.

The effect of this arrangement is that when the detection piece P1 passes the first detector D1 position, the detector D1 detects it and emits a pulse signal, and then the pulley 2
2 rotates β°=15° in the direction of arrow 27, the detection piece P
8 passes through the second detector D2 position, and the detector D2
detects this and issues a pulse signal, and then when the pulley 22 further rotates β° = 15° in the direction of the arrow 27, the detection piece P7 passes the detector D3 position, so the detector D
3 detects this and issues a pulse signal. Furthermore, when the pulley 22 is rotated by .beta..degree.=15.degree. in the direction of the arrow 27, the detection piece P2 passes the position of the detector D1, and thus a pulse signal is generated in the same manner as described above. This process is repeated one after another, and each time the pulley 22 rotates β°=15°, one of the detectors generates a pulse signal.

Note that the embodiment shown in FIGS. 3a and 3b described earlier also satisfies the above equation of θi°, and to explain this, in FIG. 3a, the first detection The detector 15a selects N=0, θi゜=0゜×45゜+(1-1)×15゜ =0゜, and the second detector 15b also selects N=0, θ2゜=0゜. ×45° + (2-1) × 15° = 15° Select N = 0 for the third detector 15c as well, θ3° = 0° × 45° + (3-1) × 15° = 30° That is.

As described above in detail with examples and numerical examples, using a pulley equipped with n detection pieces,
If m detectors are used and arranged with phase angles for detection, the accuracy of detecting the amount of cable movement or the fineness of the detection will be as low as when using a single detector. This is an improvement of m times. Or, generally speaking, the detection accuracy is determined by n x m, so select and apply the numbers n and m according to the required accuracy,
It is possible to perform "fine-grained" detection.

As described above, by using the device for detecting the amount of cable movement in a cableway pulley of the present invention, the detection of the amount of cable movement, which had conventionally had poor detection accuracy, has been improved by accurately indexing a large number of detection pieces on the pulley. Moreover, it is not necessary to install them in parallel and can be easily improved, so they are highly effective in controlling cableway operation, control, operation, marking, etc.

[Brief explanation of drawings]

Fig. 1a is a plan view of a conventional cable movement amount detection device, Fig. 1b is a front view showing a partially sectional view of a conventional cable movement amount detection device, and Fig. 2a is a conventional FIG. 2b is a plan view of another example of the cable movement amount detection device, FIG. 2b is a front view showing a partially sectional view of another example of the conventional cable movement amount detection device, and FIG. FIG. 3b is a plan view of the device for detecting the amount of cable movement in the cableway pulley of the invention; FIG. A device for detecting the amount of cable movement in a cableway pulley devised,
FIG. 5 is a block diagram illustrating signal transmission, and a plan view illustrating the arrangement of detectors in a general case of the cable movement amount detecting device for a cableway pulley according to the present invention. 1... Cable, 2... Pulley, 3... Axis, 4a, 4
b, 4c...4h...detection piece, 5...detector, 6
...Gap, 7...Arrow, 8a, 8b, 8c...8
h...Reinforcement rim, 9a, 9b, 9c...9h...
Space part, 11... Cable, 11a... One end, 11b
...Other end, 12...Pulley, 13...Shaft, 14a,
14b...14h...detection piece, 15a, 15b,
15c...Detector, 16...Gap, 17...Arrow, 21...Cable, 22...Pulley, 24a, 24
b...24h...Detection piece, 25a, 25b, 25
c...Detector, 27...Arrow, C...Counter, RY...Relay, α...Arrangement angle, β...Angle, θ1°, θ2°, θ3°...Phase angle, P1, P2, …
…
P8...Pn...Detector, D1, D2, D3...
Dm……Detector.

Claims (1)

[Scope of utility model registration request] A pulley around which a cable is wound and rotates as the cable moves; a plurality of n detection pieces arranged and fixed to the pulley at equal angles in a radial direction; It consists of a plurality of m detectors arranged at fixed positions, and a counter, and each of the detectors detects when any of the detection pieces passes through the detector position and generates a pulse. A cable movement amount detection device that outputs a signal and inputs it to the counter, and the counter counts the input pulse signal and outputs a signal when the counted value reaches a set value to perform necessary control on the operation of the cableway. Then, the mutual arrangement angle α° between two adjacent detection pieces among the detection pieces is α°=360°/n, and the angle β° is,
When β゜=α゜/m and N is a number that can be arbitrarily selected from the range O≦N≦(n-1), the m
The i-th (1≦i≦m) detector starts from an arbitrarily determined reference position as θ ₀ ° = 0 ° and moves toward the direction in which the pulley rotates at a phase angle θi ° = N・α+ (i-
1) A cable movement amount detection device for a cableway pulley, characterized in that it is arranged at a position forming β.