JPS6241115A - Blockage sensing device for discharge chute - Google Patents

Abstract

PURPOSE:To enhance the accuracy of sensing the blockage of a discharge chute, by providing a means for detecting the weight of the discharge chute between a conveyer device and the discharge chute so that the conveyer device is stopped when the weight of the chute reaches a predetermined value. CONSTITUTION:When a material to be conveyed is introduced into a hopper 9, the material is received by a checking flange 15 of a blockage sensing device 13 through 17. Further, when the weight of the material exceeds a limited value, the checking flange 15 lowers to effect a relative displacement between upper and lower guides 19, 20, resulting in a compression spring 21 being compressed, and therefore, the abutting section 15a of the flange 15 presses the limit terminal 17a in a switch 17 to cut off an electrical circuit so that a conveyer motor, a hydraulic circuit, and a power source, etc. are deenergized. With this arrangement, it is possible to enhance the accuracy of detection of blockage.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention provides a discharge chute blockage detection device, in particular, a discharge chute blockage detection device that detects blockage of the discharge chute by monitoring the weight of the discharge chute. It relates to a sensing device.

<Prior Art> As concrete casting equipment used for constructing concrete structures, there is a conveying device in which a telescopic boom is loaded on a vehicle and a belt conveyor is attached to the telescopic boom. This type of conveyance device has a telescopic boom with a telescopic structure that extends and contracts using a hydraulic cylinder, etc., installed on a moving vehicle so that it can rotate and rise up and down, and a fixed conveyor and a movable conveyor that can slide freely relative to the boom frame of the telescopic boom. An example of this is shown in Figures 5 and 6.
It is shown in the figure. As is clear from these figures, the mobile vehicle 1 is provided with a swivel base 2 with a counterweight that is rotated by a drive device such as a motor, and a telescopic boom 5 that is raised and raised by a cylinder 4 with a bracket 3 as a fulcrum is installed on this. has been done.

The telescopic boom 5 has a tip to rear end boom frame 5a of a multi-stage telescopic structure such as a three-stage type shown in FIGS. 5 and 6.
, 5b, 5c are telescopically connected, and an endless conveyor belt 6 is connected to each boom frame 5a, 5b, 5c in a series to be telescopically connected as the boom 5 expands and contracts. This conveyor belt 6 has a tip boom frame 5a.
From the tip of the head pulley 7. to the rear end of the rear end boom frame 5C. It is expanded and contracted by a combination of a pent pulley and a tail pulley 8. The telescopic boom 5, conveyor belt 6, various pulleys 7.8, and drive mechanism constitute a belt conveyor that is a conveying device. Moreover, at the tip of the tip boom frame 5a of this belt conveyor.

A discharge chute 11 consisting of a hopper 9 and a chute 1o is attached.

<Problems to be Solved by the Invention> However, in the discharge chute attached to such a conventional conveying device, the discharge chute itself is fixedly attached to the frame of the conveying device, and concrete,
When conveyance materials such as aggregates are put into the discharge chute, blockage of the discharge chute can be detected by visual observation, and in reality, it cannot be detected unless the phenomenon of overflow of conveyances due to blockage occurs. Therefore, there was a risk that the conveyed object would be damaged, such as the belt being cut.

The present invention has been made by focusing on such conventional problems, and its purpose is to detect the blockage of the discharge chute by the change in weight of the discharge chute, and to protect the conveying device without visual inspection. It is to do so.

Means for Solving Problems> In order to achieve the above-mentioned object, the present invention includes a discharge chute at the attachment part of the discharge shoe 1-, which receives the conveyed material of the device consisting of a hopper and a chute, to the conveying device. Provide a means to detect the weight of
The gist is that the operation of the conveying device is regulated when the discharge chute reaches a predetermined weight. Such a discharge chute blockage sensing device can be applied to various conveying devices, including the telescopic boom type conveyor device as described above, and can be applied over a wide range of applications.

Action> Materials such as concrete transported by a conveyor such as a belt conveyor are thrown into a discharge chute at the front end of the conveyor. As long as the loaded material is flowing smoothly down the discharge chute, there is no problem with the discharge chute, and the work of introducing the material continues.

However, if the discharge chute becomes clogged, the weight of the discharge chute increases and the weight detection means is activated. In this way, by sensing the blockage of the discharge chute, the operation of the conveying device is regulated, thereby preventing damage or malfunction of the conveying device.

Example 1 to 4 are diagrams showing one embodiment of the present invention.

The discharge chute occlusion sensing device according to this embodiment has a fifth
This figure shows an example in which it is attached to a telescopic boom type conveyor belt device as shown in FIGS. This discharge chute blockage detection device is configured to connect a discharge chute 11 suspended and supported by a conveying device 14 having a telescoping boom 5 and a belt conveyor 6 hooked to the telescoping boom 5, and a discharge chute 1-11. and a means for sensing the blockage by a change in the weight of the block. The discharge chute 11 is composed of a funnel-shaped hopper 9 having an input port formed at the upper end and gradually expanding from the lower end to the upper end, and a cylindrical chute 10 connected to the lower side of the hopper 9. has been done.

This discharge chute 11 is connected to the conveying device by attaching a bracket 12 to the tip side of the telescopic boom 5, which is the frame of the conveying device 14, and engaging the hopper 9 with a hanging hinge 13 pinned to this bracket 12. Supported by hanging. At this discharge chute 11 attachment part, the hanging hinge 1
3 consists of a hinge body 13a and a support part 13b extending from the inner flange of this hinge body 13a, and this support part 13b
Attach the hook flange 15 fixed to the upper end of the hopper 9 to the upper side of r;1r! On the other hand, a limit switch or switch member 17 is attached to the lower side of the support portion 13b.

The hook flange 15 of the hopper 9 has a. As shown in FIG. 3, a cylindrical upper guide member 19 extending downward and a contact portion 15a projecting downward are provided, while the upper surface of the support portion 13b is provided with a nested support member 19 that is nested in the upper guide member 19. A cylindrical lower guide 20 is provided, and both guide members 19
．． A compression spring 21 is disposed within the hook flange 15 and the support portion 13b. For this purpose, the discharge chute 11 is connected to the guide member 19, 20 and the compression spring 2.
It is elastically supported by 1. Further, a through hole 13c is formed in the support portion 13b and extends vertically through the through hole 13c.
The contact terminals 18 of the switch member 17 are connected to the support portion 13 through the
bProtrudes from the top surface. Thus, at the attachment point of the discharge chute 11 to the conveying device 14.

This blockage of the discharge chute 11 is made up of a hook flange 15, a chute holder 16 having an upper guide member 19 and a lower guide member 20 that slide relative to each other in the vertical direction, and a compression spring 21, and a switch member 17. An occlusion sensing device is provided that senses by weight detection.

The operation of the conveying device incorporating the discharge chute occlusion sensing device having such a configuration will be explained based on the flowchart shown in FIG. 4.

First, in step STI, an object such as concrete is conveyed on a telescopic boom type conveyor device. These objects are discharged into the hopper 9 of the discharge chute 11 in step ST2. When the object to be transported is put into the hopper 9, the blockage sensing device determines whether the weight of the chute hopper and the object to be transported is appropriate in step ST3, and if it is appropriate, it is determined in step ST4 whether or not the transport is finished. judge. If the transportation is completed, the operation is terminated, and if the transportation is not completed, the process returns to step STI. On the other hand, the above step S
If the weight of the hopper and the transported object are not appropriate at T3, in the mechanism of the blockage sensing device shown in FIG. to cut off the electrical circuit. As a result, the motor, power supply, hydraulic circuit, etc. of the conveyor device are stopped (step 5T6). Next, the blockage sensing device checks whether the overload has been released (step 5T7), and if it has not been released, the process proceeds to step ST6.
On the other hand, if the overload is released, go to step ST8.
The limit terminal is disconnected at step S, and step S
Return to TI's transport work of concrete, etc.

<Effects of the Invention> As explained above, according to the present invention, a device for detecting blockage by detecting the weight of the discharge chute is provided at the attachment part of the discharge chute to the transport device frame, so that the conveyance to the discharge chute is prevented. It is possible to constantly monitor whether the feeding is normal or abnormal, and prevent damage or failure of the conveyor due to blockage.

[Brief Description of the Drawings] Fig. 1 is a side view showing a discharge chute occlusion sensing device according to an embodiment of the present invention, and Fig. 2 is a side view showing the same part as Fig. 1 from a different angle. A front sectional view taken along the line ■-■, FIG. 3 is a cross-sectional view of main parts showing details of the discharge chute occlusion sensing device, and FIG. 4 is a flowchart showing the operation of the conveyance device equipped with the discharge chute occlusion sensing device, FIG. 5 is a front view showing a conventional telescopic boom type conveyance device equipped with a discharge chute, and FIG. 6 is a screen view of the same portion as FIG. 5 viewed from a different angle. 1...Vehicle, 2...Swivel base, 5...Telescopic boom 56...
Conveyor belt, 9...hopper, 10...chute, 1
1. Release chute, 17. Switch member, 19.2
0... Guide member, 21... Compression spring.

Claims (1)

[Claims] Consisting of a hopper that has an input port at the upper end and expands from the lower end to the upper end, and a chute with a cylindrical structure connected to the lower end of the hopper, the hopper conveys the material to be loaded into the hopper. In the discharge chute attached to the frame of the conveyance device, a means is provided between the conveyance device and the discharge chute to detect the weight of the discharge chute, and when the discharge chute reaches a certain weight, the operation of the conveyance device is stopped. A discharge chute occlusion sensing device characterized by: