JP2812458B2 - Travel position detection device for cable crane - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for detecting a traveling position of a cable crane which transports concrete in, for example, a dam construction, and more particularly to a cable in which a moving tower to which a main cable of a cable crane is mounted travels on a pair of traveling rails. The present invention relates to a traveling position detection device for a crane.

[0002]

2. Description of the Related Art In the construction of a dam, as a concrete transport method, concrete kneaded in a concrete plant is transported by a transport vehicle, and then concrete is transferred to a bucket of a cable crane and transported to a predetermined position of the dam by a cable crane. Transport systems are commonly employed.

[0003] The applicant of the present invention relates to this system by
In a transportation system comprising a transportation track on which a transportation vehicle travels and a cable crane having one end fixed and extending crossing the transportation path and the other end being moved by a traveling cable or the like, We proposed a fixed position stop control method for a truck that automatically stops the truck at the optimal position for the bucket of the cable crane.

According to this proposal, a transporting track comprising a transporting track on which a transporting vehicle travels and a cable crane having one end fixed and extending crossing the transporting track and the other end being moved by a traveling cable or the like. In the system, the deflection angle of the main cable of the cable crane is detected by the main cable angle detection device,
The detection signal is input to a microcomputer mounted on the transport vehicle to calculate the expected landing position of the cable crane bucket, and the travel distance of the transport vehicle is constantly detected by the travel distance detection device provided on the transport vehicle, and Input to the microcomputer, control the acceleration motor driving the transport vehicle by calculating the deceleration position and the stop position required for the traveling control of the transport vehicle by the microcomputer, based on the expected landing position of the cable crane bucket, and The stop position of the transport vehicle can be corrected by a reflector provided on the bucket and a photoelectric switch provided on the transport vehicle.

The above proposal is effective, but has the following problems. (1) When a cable crane is a loaned item from a company, an angle detector may not be attached to a fixed tower structurally depending on the crane manufacturer.

(2) As shown in FIG. 13, for example, as shown in FIG. 13, a cable crane main rope C for running a cable crane trolley B suspended with a concrete bucket A is connected to both cable crane traveling rails D1, D.
In the case of a both-end traveling type suspended by both moving towers E1 and E2 traveling on the vehicle 2, an angle detector cannot be attached to both moving towers E1 and E2. In addition, the code | symbol F in a figure is a conveyance track, G
, H is a concrete plant, J is a bucket cradle, and K is a cable crane cab.

(3) As shown in FIG. 14, one end of a cable crane main rope C is stretched between a fixed tower E on which an angle detector is mounted and a movable tower E1 traveling on a cable crane traveling rail D. In the case of the formula, when the distance L between the transport trajectory F and the fixed tower E is large, for example, about 500 m, the target position of the transport vehicle G changes greatly with a slight change in the main rope angle θ.

(4) As shown in FIGS. 15 to 17, when the fixed tower E is supported by the side stay E3 and has a structure in which it is slightly moved in the direction of the arrow, an angle detector attached to the fixed tower E is used. It is difficult to detect the angle. In this example, for example, a main rope C that transports a bucket A of 6 m ³ and a main rope CA that transports a bucket AA of 3 m ³ , for example,
Are provided, the members on the main cable CA side are shown with a suffix A, and reference numeral C1 is a back wire.

Japanese Patent Publication No. 51-12883 discloses a technique in which a proximity switch is provided on a moving body, and an iron piece to which the proximity switch responds is arranged along a rail to detect the position of the moving body. I have. However, according to such a known technique, a malfunction occurs when the iron material is scattered as in a construction site.

[0010]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a traveling position detecting device for a cable crane which can accurately detect the traveling position of a moving tower even at a construction site.

[0011]

According to the present invention, a traveling tower to which a main rope of a cable crane is attached travels on a pair of traveling rails. An attachment is attached to the fixing bolt via an adapter, a proximity switch is attached to the movable tower at a position facing the attachment so as to adjust the distance from the attachment, and a screw portion of the attachment is a screw of the adapter. The proximity switch is screwed into the hole, and is connected to the operation panel of the operator cab of the cable crane via the traveling position detecting means.

[0012]

DESCRIPTION OF THE EFFECTS As is well known, the spacing between the fixing bolts for fixing the rails is substantially equal. Therefore, the proximity switch provided in the moving tower detects the attachment attached to the bolt, so that the position can be accurately detected. Since the signal from the proximity switch is transmitted to the operation panel of the cable crane cab, for example, the concrete transport vehicle can be properly stopped. At this time, the attachment is attached via an adapter, and the two are screwed together, so that the attachment can be installed at an appropriate height. Therefore, the proximity switch does not malfunction due to the iron material or the like scattered near the rail. In addition, since the proximity switch can also adjust the distance from the attachment, the malfunction can be eliminated by adjusting the proximity switch to an appropriate distance. As described above, according to the present invention, the correct position of the moving tower can be known by providing the attachment using the rail fixing bolt.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 5 show an apparatus for carrying out the present invention.

In FIG. 1, a movable tower 10 supporting one end of a cable crane main rope 16 is movably provided via wheels 11 on an arc-shaped cable crane traveling rail generally designated by reference numeral 1. It is designed to be run by means that do not.

2 to 5, the rail 1 is provided with a first rail 2, a second rail 3 and a third rail 4 from the outside in the radial direction. An iron attachment 6 is attached to one of a plurality of rail fixing bolts 5 for fixing both lower ends of the second rail 3.

On the other hand, the attachment 5
A pair of proximity switches 12 is mounted at a position facing the device with a predetermined distance L1 (for example, 100 mm).

In FIGS. 6 and 7, the head 5a of the rail fixing bolt 5 is housed in the recess 7a of the adapter 7;
The position around the axis of the adapter 7 is determined and fixed by the set bolt 8. A screw hole 7b is formed in the upper part of the adapter 7, and the attachment 6 is formed with a screw hole 7a by a screw portion 6b formed continuously with the head 6a.
Is screwed into. Then, the height of the head 6a is determined and fixed by the set bolt 9.

In FIGS. 5 and 8 to 10, the moving tower 10 is provided with a bracket 14 so as to be vertically movable. The proximity switches 12, 12 are fixed to the lower end 14a of the bracket 14 by a double lock nut 15. The proximity switches 12 and 12 are connected to running position detecting means (not shown), and the running position detecting means is connected to an operation panel (not shown) of the cable crane operating room K (FIG. 15).

Next, the manner of detecting the traveling position of the moving tower 10 will be described.

When the moving tower 10 travels on the cable crane traveling rail 1 while supporting one end of the cable crane main rope 16, the proximity switches 12, 12 read the number of the attachments 6 from the reference point. Then, the traveling position detecting means accurately detects the traveling position of the moving tower 10 from the reference point based on the signals from the proximity switches 12 and 12 and transmits the detected traveling position to the operation panel of the cable crane operation room K. The operation panel calculates the deflection angle of the main cable 16 of the cable crane based on the input current position of the moving tower 10, determines the stop target position of the transport vehicle G (FIG. 10), and controls the stop of the transport vehicle G. .

As shown in FIG. 11, when the center of curvature of the cable crane traveling rail 1 does not coincide with the fixed tower E (FIG. 15), the length of the cable crane main rope 16 is changed to the position of the movable tower 10. To the lengths M1 and M2, but the length difference M2-M1 can be corrected.

In a double-end traveling type as shown in FIG. 12, when moving towers 10A and 10B run on cable crane running rails 1A and 1B, respectively,
The travel position of each of 0A and 10B can be detected, and the virtual center position N can be obtained to correct the position.

[0024]

As described above, according to the present invention, the following slick effects are obtained. (A) Since the attachment is attached using the traveling rail fixing bolts whose dimensions are known, an accurate position can be obtained. (B) Since the attachment is screwed via the adapter, the height can be made uniform and the proximity switch can be operated accurately. Also, since the attachment is high, the proximity switch may be erroneously operated due to scattered iron material. Does not work. (C) Since the proximity switch is also adjustable, the distance to the attachment can be set correctly, and the operation is reliable. (D) The truck can be stopped properly with respect to the bucket of the crane traveling on the main cable of the cable crane.

[0025]

[Brief description of the drawings]

FIG. 1 is a plan view showing an example of an apparatus for implementing the present invention.

FIG. 2 is a plan view showing details of a cable crane traveling rail in FIG. 1;

FIG. 3 is a view taken in the direction of the arrow X in FIG. 1;

FIG. 4 is a top view of FIG. 3;

FIG. 5 is a side view of FIG. 3;

FIG. 6 is a side view showing the adapter.

FIG. 7 is a view taken in the direction of the arrow Y in FIG. 6;

FIG. 8 is a side view showing the proximity switch.

FIG. 9 is a front view of FIG. 8;

FIG. 10 is a top view of FIG. 9;

FIG. 11 is a plan view for explaining length correction of a main cable of a cable crane according to the present invention.

FIG. 12 is a plan view illustrating position correction according to the present invention.

FIG. 13 is a perspective view illustrating a cable crane that is driven at both ends.

FIG. 14 is a plan view illustrating a fixed-end cable crane.

FIG. 15 is a perspective view illustrating another example of a cable crane fixed at one end.

FIG. 16 is a top view showing the fixed tower supported by the side stay.

FIG. 17 is a side perspective view of FIG. 16;

[Explanation of symbols]

 A, AA: Concrete bucket B, BA: Cable crane trolley C, CA: Cable crane main rope C1: Back wire D, D1, D2: Cable crane traveling rail E, EA ... -Fixed tower E1, E2-Moving tower E3-Side stay F, FA-Transport path G, GA-Transport vehicle H-Concrete plant J-Bucket stand K, KA- ..Cable crane cab N ... Virtual center point 1, 1A, 1B ... Cable crane traveling rail 2 ... First rail 3 ... Second rail 4 ... Third rail 5 ... Rail fixing bolt 6 Attachment 6a Head 6b Screw 7 Adapter 7a Recess 7b Screw hole 8, 9 Set bolt 10, 10A, 10B・And transfer tower 11 ... wheel 12 ... proximity switch 14 ... bracket 15 ... lock nut

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Yuji Hiramatsu 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (56) References JP-B-51-12883 (JP, B1) (58) Surveyed field (Int. Cl. ⁶ , DB name) B66C 21/00 B66C 13/46 B66C 21/04

Claims (1)

(57) [Claims] 1. A traveling position detecting device for a cable crane in which a movable tower on which a main rope of a cable crane is mounted travels on a pair of traveling rails, wherein a fixing bolt for fixing the traveling rail is attached via an adapter. A proximity switch is attached to the movable tower at a position facing the attachment so as to adjust the distance to the attachment, and a screw portion of the attachment is screwed into a screw hole of the adapter, A travel position detecting device for a cable crane, wherein the switch is connected to an operation panel in a cab of the cable crane via travel position detecting means.