JPH0124010Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a device for attaching and detaching a detection marker to a metallic foreign object detector. More specifically, the present invention is capable of attaching and detaching a detection marker to a detector for metallic foreign substances that may be mixed into products conveyed on a belt conveyor, such as coal excavated at a coal mine site or coke produced at a coke factory. This relates to equipment that performs

[Prior Art] When conveying a large amount of mined coal, coke, fertilizer, etc. on a belt conveyor, if metallic foreign matter is mixed into these products, the belt will be damaged accordingly. Originally, conveyor belts are endless, and depending on the degree of damage, the entire conveyor belt used to transport products over long distances may have to be replaced, resulting in the expense and temporary interruption of production. The damage caused is considerable. Conventionally, methods for removing metallic foreign substances that are mixed into conveyed products include automatic adsorption and collection using magnetic separators;
Detected by a metal detector equipped with a search coil,
There is a method of manually removing the detected metallic foreign matter. Among these methods, in the method of removing metallic foreign matter using a metal detector, when a metallic foreign matter is detected, a detection marker (detection label, hereinafter referred to as marker) is dropped from the metal detector onto the product, notifying the location of the metallic foreign matter and A system in which the belt conveyor stops is known.

[Problems to be solved by the invention] The method for removing metallic foreign objects using the metal detector described above is based on the method of removing metallic foreign objects using the metal detector. Due to misalignment, there are disadvantages such as not being able to indicate the exact location of metallic foreign objects, lengthening the search time (BC stop time), and in some cases being lost and unable to be recovered due to their small size. There is an inconvenience in that manual labor is required to retrieve the dropped marker and attach it to the latching part (eg, latching hook) of the metal detector.

[Means for Solving the Problems] The present invention removes the hanging part of the detection marker from the hook part of the metal foreign object detector when a metal foreign object is detected mixed into the product being transported by the belt conveyor. In a device for attaching and detaching a detection marker to a metal foreign object detector having a configuration in which the detection marker body is dropped onto the product, a sensor is installed approximately in the widthwise center of the belt conveyor and inclined slightly upward in the conveying direction. an overhead wire stretched over the overhead wire; a pulley that runs forward and backward on the overhead wire and to which the detection marker is connected by a flexible wire; and a hanging portion of the detection marker that is attached to the pulley and is detachable. a hook that suspends the detection marker body by holding the detection marker body;
When the detection marker is suspended on the hook, its own weight causes the pulley to run backwards to the installation position of the metal foreign object detector in the opposite direction to the conveyance direction of the belt conveyor, and the detection marker is suspended from the hook. The metal foreign object detector is configured such that, when the hanging portion is removed from the hook, the detection marker body is removably hooked to the hook portion of the metal foreign object detector, so that the detection marker body is suspended. The gist is a device for attaching and detaching detection markers. Here, as the hanging part, for example, a hanging hook can be used, and as the hanging part, for example, a hanging ring can be used.

[Function] A pulley carrying a recovered marker runs backwards under its own weight on an overhead wire stretched at an angle above a belt conveyor, and the marker is activated by a falling device that is activated by a signal from a metal foreign object detector. Since the hanging part is automatically suspended, manual labor is saved. In addition, since the marker is made of a bag containing a fluid granular solid material such as sand, it remains stable even if it falls onto the product, and the marker and pulley are connected with wire. There is no fear of loss.

[Example] Hereinafter, the present invention will be explained based on the drawings. FIG. 1 shows a side view of an embodiment of the present invention. In the figure, 1 is a belt conveyor that carries granular or powdered products 2 such as coal, coke, and ammonium sulfate and conveys them in the direction of the arrow; 3 is a rotating roll that supports the belt conveyor 3; and 4 is a belt conveyor that is supported by columns. , belt conveyor 2
This is a metallic foreign matter detector that is installed across the width direction of the product 2 and detects metallic foreign matter that is mixed into the product 2 as a contaminant. As the metallic foreign object detector 4,
An example is a metal detector with a built-in search coil. Reference numeral 5 denotes a dropping device, which is installed approximately at the center of the belt conveyor 2 in the width direction and is supported by a support.
The dropping device 5 is provided with a hook 6 that projects horizontally in the conveyance direction of the belt conveyor 2, and a marker 7 is suspended from this hook. Then, the latch hook 6 receives a signal indicating that a metal foreign object has been detected from the metal foreign object detector 4, and the latch hook 6 is retracted to place the suspended marker 7 on the product 2. It's starting to fall. The marker 7 consists of a cloth bag containing granules made of non-metallic substances such as sand and plastic particles,
It deforms freely and stably fits onto the unevenness of the surface of the product 2. For example, as shown in the enlarged front view of FIG. A suspension ring 8 on which the main body is suspended is attached. 9 and 10 are stretched between an arm 12 (shown with diagonal lines) extending from the vertical support 11 in the width direction of the belt conveyor 2 and another arm (not shown) provided in the conveyance direction of the belt conveyor 2. This is the overhead wire. The overhead wire 9,
Reference numeral 10 is made of a rigid wire such as piano wire, and as shown in the figure, the slope is higher as it goes in the conveying direction of the belt conveyor 2, and the upper and lower ends are placed approximately in the widthwise center of the belt conveyor 2. They overlap and are stretched parallel to each other. Reference numeral 13 denotes a pulley that runs forward and backward along the overhead wires 9 and 10. For example, as shown in the enlarged perspective view of FIG. holes 9a and 10a through which the
are provided at the top and bottom. The overhead wire 10 stretched downward is for preventing the pulley 13 from swaying when traveling. The running speed of the pulley 13 can be adjusted by using a tanbuckle (not shown) provided on the side of the other arm on which the overhead wire 10 is stretched.
This is done by setting a tension of 0. The suspension ring 8 of the marker 7 is removably fitted into the bottom plate 13c surrounding the pulley 13, and the marker 7
A swingable hook 14 for suspending the main body and a flexible wire 15 for connecting the marker 7 are provided. Here, the hook 14, with the marker 7 suspended therein, runs backwards due to its own weight in a lower direction along the overhead wires 9 and 10 on which the pulley 13 is slanted.
When approaching the dropping device 5, the hanging ring 8 of the suspended marker 7 is detached from the hook 14, and is instead inserted into the hook 6 of the dropping device 5, so that the marker body 7 can be suspended for a long time. shall be the same.

Next, the operation of the attachment/detachment device of this embodiment is
This will be explained based on Figure 6. First, as shown in FIG. 1, the hook 6 on the dropping device 5 is held horizontally, and the hanging ring 8 of the marker 7 is inserted into it.
When the product 2 containing metallic foreign matter is transported with the marker 7 main body suspended, the dropping device 5 receives a detection signal from the metallic foreign matter detector 4 as shown in FIG. , the hook 6 is retracted (indicated by arrow A), and the marker 7 that was suspended is dropped onto the product 2. and marker 7
fits onto the uneven surface of the product 2, deforms and stabilizes. Also, at this time, the belt conveyor 1 is commanded to stop conveying, but since the belt conveyor 1 runs slightly in the conveying direction due to inertia, the location where the metallic foreign object is present almost coincides with the point where the marker 7 falls. When the belt conveyor 1 has completely stopped, as shown in FIG. state (indicated by arrow B). Note that the pulley 13 and marker 7 are connected to each other. Therefore, there is no possibility that the marker 7 will fly out from the top of the product 2 and the powder will be lost. Next, the vicinity of the falling point of the marker 7 is manually searched and metal foreign objects are removed. In this case, as mentioned above, the falling point of the marker 7 is obvious from the position of the connecting pulley, and Since the locations of the foreign objects are almost the same, it is extremely easy to find the metallic foreign objects. after that,
As shown in FIG. 6, the hanging ring 8 of the marker 7 is manually inserted into the hook 14 of the pulley 13 to suspend the marker 7 body. Then, pulley 1
3 runs backwards (indicated by arrow C) in the direction of the installation position of the dropping device 5 due to its own weight. At this point, the hook 6 of the dropping device 5 has returned to the horizontal state due to the operation of the timer, and the pulley 13 running in the opposite direction approaches the installation position of the dropping device 5, and the marker 7 suspended on the hook 14 The hanging ring 8 is now the latching hook 6
By automatically replacing and inserting into
The marker body is suspended from this, and the pulley 13
continues to run in the opposite direction and stops at the stopper 16, returning to the state shown in FIG. 1. The dropping device 5 is equipped with a limit switch (not shown) that confirms that the suspension ring 8 of the marker 7 is inserted into the latching hook 6 and suspended, and this is displayed in the operator's cab. Then, the driving of the belt conveyor 1 is started, and the conveyance of the products is resumed.

[Effects] The present invention has the above-described configuration, and is used to detect the presence of metallic foreign matter that may be mixed in when the product is transported by a belt conveyor equipped with a metallic foreign matter detector. Detection markers that have fallen onto the surface are automatically returned to the detector system, reducing the need for manpower. In addition, since the location where the metal foreign object is reported by the detection marker and the actual location are extremely close to each other, the removal of the foreign object can be done easily and in a short time. When applied to the removal of metallic foreign matter during the product transport process, it is extremely effective.

[Brief explanation of the drawing]

Figure 1 is a side view of one embodiment of the device of the present invention;
The figure is a front view of an example of a detection marker according to the present invention, FIG. 3 is a perspective view of an example of a pulley according to the present invention, and FIGS. 4 to 6 are explanatory views of the operation of the present invention. 1... Belt conveyor, 2... Product, 3... Rotating roll, 4... Metal foreign object detector, 5... Dropping device, 6... Latching hook, 7... Detection marker,
8... Hanging ring, 9, 10... Catenary wire, 11... Support column,
12...Arm, 13...Pulley, 14...Hook, 15...Wire, 16...Stopper.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. When a metallic foreign object is detected mixed into a product being transported by a belt conveyor, the hanging part of the detection marker is removed from the hooking part of the metallic foreign object detector,
In a device for attaching and detaching a detection marker to a metal foreign object detector having a configuration in which the detection marker body is dropped onto the product, a sensor is installed approximately at the widthwise center of the belt conveyor and inclined slightly upward in the conveying direction. A stretched overhead wire; a pulley that runs forward and backward on the overhead wire and to which the detection marker is connected by a flexible wire; and a pulley that is attached to the pulley and removably holds the hanging portion of the detection marker. and a hook for suspending the detection marker main body, and when the detection marker is suspended from the hook, the pulley is moved in the opposite direction to the conveyance direction of the belt conveyor due to its own weight. When the hanging part of the detection marker is removed from the hook, it is removably hooked to the hook part of the metal foreign object detector, and the detection marker body is suspended from the hook. 1. A device for attaching and detaching a detection marker to a metallic foreign object detector, characterized in that the device is configured so that the detection marker is attached to and detached from a metallic foreign object detector. 2. When the metallic foreign object detector detects a metallic foreign object mixed into the product being transported on the belt conveyor,
The hook is retracted, and the hanging ring, which is the hanging part of the suspended detection marker, is detached from the hook, and the detection marker itself falls onto the product. A device for attaching and detaching a detection marker to a metallic foreign object detector according to claim 1. 3. A device for attaching and detaching a detection marker to a metallic foreign substance detector according to claim 1 or 2 of the utility model registration claim, wherein the detection marker is a cloth bag filled with particles of sand, plastic particles, or other non-metallic substances.