JPH04138083U - Deflection angle detection device - Google Patents

Abstract

(57) [Summary] [Purpose] It was possible to measure the swing angle of a rope without being affected by the swing of the suspended load at the end of the rope. [Structure] A wire 7 stretched horizontally from the wire displacement meter 6 is attached to the rope that is a certain distance down from the swing center 4 of the rope 2, and the swing angle θ of the rope 2 is measured by the output of the wire displacement meter 6 and the wire 7 of the rope 2. It is characterized in that it is calculated from the distance l between the swing center 4 and the attachment point of the wire 7 on the rope 2.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a swing angle detection device for detecting the swing angle of a crane rope.

0002

[Conventional technology]

A conventional technique for a deflection angle detection device will be explained using FIG. 5. In this specification The term crane refers to the movement of the trolley 1 on the rail 8, as shown in the model in Figure 5. Cargo handling is carried out by lifting and lowering rope 2 hanging from trolley 1. .

0003 The conventional deflection angle detection device is mounted on the suspended load 3 parallel to the rail 8 as shown in Fig. 5. An attached accelerometer 51 was used. When the swing angle θ of the rope is θ<<1, the absolute value of the horizontal acceleration a of the suspended load is Since it is proportional to the deflection angle θ, it is possible to calculate the deflection angle θ by detecting the acceleration a. Wear.

0004

[Problem that the idea aims to solve]

With a crane, when the load is suspended from a single point and attached to a rope, The suspended load may swing around the end of the rope. This situation is shown in FIG. In such cases, in conventional swing angle detection devices, the accelerometer is In addition to the acceleration caused by the swing of the suspended load around the rope tip, the Because of this, it is not possible to detect only the acceleration due to the swing of the rope, and the There was a problem that the deflection angle could not be calculated correctly.

[0005] This invention was devised in view of these circumstances, and its purpose is to attach the rope to the tip. An object of the present invention is to provide a swing angle detection device that is not affected by the swing of a suspended load.

[0006]

[Means to solve the problem]

An embodiment of the present invention for achieving the above purpose will be explained using FIGS. 1 to 4. Then, the present invention places a wire on the rope 2 that is a certain distance down from the swing center 4 of the rope 2. Attach the horizontally stretched wire 7 from the - type displacement meter 6, and measure the swing angle θ of the rope 2. The output of the ear displacement meter 6, the swing center 4 of the rope 2, and the wire 7 on the rope 2 It is characterized in that it is calculated from the distance l between the dots.

[0007]

[Effect]

The present invention uses the above-mentioned means to reduce the swing angle of the rope to a point close to the rope swing center. It can be detected by detecting the displacement of the wire attachment point of the ear displacement meter. Therefore, it is not affected by the shaking of the suspended load.

[0008]

【Example】

Hereinafter, embodiments of the present invention will be described based on the drawings. FIG. 1 is a block diagram of a deflection angle detection device according to the present invention. In this figure, the top on rail 8 is A rope 2 is hanging from a trolley 1, and a hanging load 3 is attached to the tip of the rope 2. It is. In addition, a wire displacement meter 6 is attached to the stay 5 extended from the trolley 1. The wire 7 stretched from the wire displacement meter 6 is connected to the rope. ing. l is the distance from the swing center 4 of the rope 2 to the connection point between the wire 7 and the rope 2 distance, θ is the swing angle of the rope, and d is the distance the wire extends when the rope swings. represents.

[0009] FIG. 2 is an enlarged view of the vicinity of the wire-type displacement meter. In this figure, 21 is the rope 2. A weight with a penetration with an inner diameter slightly larger than the diameter, suspended from trolley 1. It is suspended by support wires 22. This weight 21 is installed in two places. Wires stretched in the transverse and running directions from the wire-type displacement meter 6 7 is connected.

0010 FIG. 3 shows a configuration diagram of the deflection angle detection device. In this figure, 31 is the calculation of the deflection angle. It is a processor that performs. FIG. 4 shows the processing procedure for detecting the deflection angle. When the wire displacement meter 6 detects the wire displacement d (step 41), the The deflection angle is calculated in the processor 31. (Step 42) The swing angle of the rope in a crane can be regarded as θ<<1, and the swing angle θ is It can be calculated using the following formula. D=d/l

[0011]

[Effect of the idea]

As mentioned above, according to the present invention, the rope is lowered by a certain distance from the center of rope swing. Attach the wire stretched from the wire displacement meter to the length of the rope and attach the wire to the swing angle of the rope. The displacement detected by the -type displacement meter, the center of rope swing, and the wire connection on the rope. It detects the swing angle of the rope by calculating it from the distance between the dots and the dots. This makes it possible to detect the swing angle without being affected by the swing of the suspended load at the end of the rope. It has the effect of

[Brief explanation of drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is an enlarged perspective view showing an embodiment of the present invention.

FIG. 3 is a block diagram showing an embodiment of the present invention.

FIG. 4 is a processing procedure diagram showing an embodiment of the present invention.

FIG. 5 is a side view showing a conventional example.

FIG. 6 is an explanatory diagram showing the shaking of a suspended load in a conventional example.

[Explanation of symbols]

2 Rope 4 Center of runout 6 Wire type displacement meter 7 wire

──────────────────────────────────────────────── ─── Continuation of front page (72) Creator Goo Murata 4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima City, Hiroshima Prefecture Mitsubishi Heavy Industries, Ltd. Hiroshima Research Center

Claims (1)

[Scope of utility model registration request] Claim 1: A wire stretched horizontally from a wire-type displacement meter is attached to a rope that is a certain distance down from the rope's swing center, and the rope's swing angle is measured by the output of the wire-type displacement meter, and the rope's swing center and the rope. A deflection angle detection device characterized in that the deflection angle is calculated from the distance between the upper wire attachment points.