JPH0216977B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a weighing and conveying device in which a discharge path is provided on the discharge side of an actuator such as a packaging machine, and a weighing mechanism is provided in the discharge path.

Since the packaging machine described above has a constant packaging cycle and a constant packaging time, if the timing for carrying in the objects to be weighed is fixed, the objects to be weighed will be carried out at regular intervals.

However, the measuring time of the object to be weighed in the weighing mechanism, that is, the time until the weighing stability signal or the weighing completion signal is output is not necessarily constant.

Therefore, if the weighing time takes longer than the packaging time, while the object to be weighed is being loaded and weighed on the weighing mechanism, the next object to be weighed is brought in and two objects to be weighed are loaded. Put it away. As a result, accurate weighing was not possible, and there were problems in that the objects to be weighed got stuck in the conveyance path.

The present invention has been made in view of the above-mentioned conventional circumstances, and its purpose is to prevent two or more objects to be weighed from being carried into a weighing mechanism, and to promptly discharge them even if they are carried into the weighing mechanism. In this way, accurate weighing can be carried out efficiently, and objects to be weighed can be prevented from clogging the conveyance path.

Such a weighing and conveying device of the present invention is provided with a first conveying path equipped with a weighing mechanism and a second conveying path connected to the conveying path on the unloading side of a working machine that conveys objects to be weighed in a constant cycle, In a weighing and conveying device that carries an object to be weighed from a work machine onto a first conveyance path, weighs the object on the conveyance path, and then transfers it to a second conveyance path, the first conveyance path is connected to the second conveyance path. In addition to providing a discharging means for moving objects to be weighed in another direction, a sensor is provided to detect illegal loading of objects to be weighed into the first conveyance path in excessive quantities or at a timing that is too early for the weighing operation. It is characterized in that the ejecting means is activated when a sensor detects the illegal import.

The above-mentioned unauthorized import into the first conveyance path refers to a situation in which two or more objects to be weighed are brought into the first conveyance path equipped with a weighing mechanism, and the sensor that detects this unauthorized import is Means for detecting quantitative excess as a result of loading, that is, detection of overweight by a weighing mechanism (Claim 2) and detection of protrusion of objects to be weighed exceeding a constant (Claim 5); This is a means for detecting a loading timing that is too early for the weighing mechanism, which may cause unauthorized loading (Claims 3 and 4).

An embodiment of the present invention will be described with reference to the drawings in the case where a packaging machine is used as a working machine.
2 is a weighing and conveying device, and the packaging machine 1 has an entrance 10.
The objects to be weighed are carried in, packaged, and carried out from the carry-out conveyor 3.

In front of the discharge conveyor 3, a first roller conveyor 4 is arranged which is inclined so that the front side is lower, and a discharge wall 7 having rollers provided on the front side of the conveyor 4 so as to be freely rotatable is movable up and down. establish.
Further, a weighing mechanism (not shown) is disposed below the first roller conveyor 4, and weighs the objects to be weighed placed on the conveyor 4.

Further, a second roller conveyor 5 is connected to the first roller conveyor 4 to form a conveyance path,
A label value attaching machine 9 is disposed above the second roller conveyor 5, and attaches a label to an object to be weighed while being conveyed.

Belt conveyors 6, 6 are stretched across the first and second roller conveyors 4, 5, and the surface of the conveyor is provided with one protrusion 6', 6' for pushing and conveying the object to be weighed. The object to be weighed is conveyed from the first roller conveyor 4 to the terminal end of the second roller conveyor 5.

A third conveyor 11 is disposed at the end of the second roller conveyor 5 to convey objects to be weighed that have been given weight values.

In the figure, numerals 8 and 8 indicate sensors consisting of a light emitting side and a light receiving side, which are disposed at the boundary between the discharge conveyor 3 and the first roller conveyor 4 to confirm that the objects to be weighed are being carried into the first roller conveyor 4.

The discharge wall 7 is provided to discharge the object to be weighed when the object is illegally brought in, and when the discharge wall 7 is knocked down by the output of a sensor that detects illegal import, the first roller All objects to be weighed on the conveyor 4 are discharged.

The control of the packaging machine 1 and weighing conveyor 2 will be explained with reference to the flowchart of FIG. 3. In the figure, the area within the broken line frame indicates the standard cycle, and the area outside the frame indicates the case where illegal import has occurred.

In the standard cycle, an object to be weighed is first carried into the packaging machine 1, then wrapped, carried out from the carry-out conveyor 3, and carried into the first roller conveyor 4.

In the sensors 8, 8, the light is blocked by the object to be weighed, confirms the arrival of the object to be weighed, and inputs the information to a control circuit (not shown).

A timer is connected to the control circuit, and the timer is set to count the time at the start of weighing, that is, when the sensors 8, 8 confirm that the objects to be weighed have been carried in.

However, in addition to the above-mentioned starting time, it may also be performed when a load of a certain level or more is applied to the metering mechanism.

When the weighing mechanism provided on the first roller conveyor 4 performs weighing and outputs a weighing stability signal, the label pricing machine 9 prints and issues the price, product name, etc. on the label. Next, the belt conveyors 6, 6 are driven, and the object to be weighed is transferred from the first roller conveyor 4 to the second roller conveyor 4.
When the object to be weighed is conveyed to the roller conveyor 5 and reaches just below the label value attaching machine 9, a label is affixed by the label value attacher 9, and the object to be weighed is carried out by the third conveyor 11. A standard cycle is to repeat the above steps.

Next, we will discuss the case of illegal import.

If a limiter is connected to the weighing mechanism and a limit value is set to the limiter, for example, the maximum weight of the object to be weighed, all outputs of the weighing mechanism exceeding the limit value will indicate that there are multiple objects to be weighed. become. That is, the limiter serves as a sensor that detects that a plurality of objects to be weighed have been carried into the weighing mechanism. During the standard cycle, when the weighing stability signal is output and the limiter exceeds the set value, that is, when multiple objects to be weighed are
When the weight of the weighed object is excessive, such as when it is carried on a roller conveyor, the discharge wall 7 is collapsed to discharge the weighed object. An apparatus provided with the above-mentioned discharge means corresponds to the metering and conveying apparatus set forth in claim 2.

Next, let's talk about the case where the timer is used as a sensor. A standard measuring time is set in advance on the timer, and when the timer counts down beyond the standard measuring time, the discharge wall 7 is knocked down and discharged, and the standard cycle is started. Return to The above is the weighing and conveying device according to claim 3.

Also, if it is within the standard weighing time, weighing will continue, but
When the sensors 8, 8 detect that the next packaged object to be weighed is brought in, the discharge wall 7 is brought down and discharged even before the weighing stability signal is output. An apparatus equipped with the above-mentioned ejection means corresponds to the metering and conveying apparatus set forth in claim 4.

In addition, the setting of the above standard weighing time to the timer is as follows. ●A standard measurement time setting circuit is installed and fixed.

●Set by pressing the keys on the console.

●Read and set the interval for loading from the packaging machine 1 using sensors 8 and 8.

There are other methods.

Next, we will discuss the case of unauthorized delivery in which the object to be weighed is placed on the weighing pan so as to protrude from the first roller conveyor 4 of the embodiment. The light will be blocked. The time during which this light is blocked is counted by a sub-timer or the like. The longest passage time of the object to be weighed is set on the sub-timer, and when the timer counts a time longer than the passage time, the discharge wall 7 is brought down. An apparatus provided with such a discharging means corresponds to a weighing and conveying apparatus according to claim 5.

In the above embodiment, the illegally brought in objects to be weighed are simply discharged, but the illegally brought in objects may be collected using a detour.

In addition, in the embodiment, the conveyance path is such that the first and second roller conveyors 4 and 5 are inclined, but they may be horizontal, and the discharge method is not limited to the embodiment, and the roller conveyor itself is rotated by a motor or the like for forced discharge. You may also do so.

In addition, it is recommended that unauthorized import be displayed on the console, and abnormalities may be confirmed using an error display, warning lamp lighting, warning buzzer, etc.

Incidentally, FIGS. 4 and 5 show modified examples of the ejection means, and 7' is an ejection shutter which is opened and closed by sliding up and down. 7'' is an ejection door, which opens on double doors.

Further, the location where the ejection mechanism is provided is not limited to the above, and may be provided at an arbitrary side portion of the first roller conveyor 4 facing the second roller conveyor 5, for example.

As described above, the present invention provides a weighing and transporting device in which a transport path is provided on the unloading side of a working machine and a weighing mechanism is provided in the transport path. Since the weighing and conveying device is provided with an operating means for discharging objects to be weighed, there is no possibility that a plurality of objects to be weighed will be carried into the weighing mechanism. In addition, even if an object is brought in, it is quickly discharged, so accurate weighing can be carried out efficiently without delay, and the conveyance path is not clogged with objects to be weighed.

[Brief explanation of drawings]

FIG. 1 is a plan view of an embodiment of the present invention, FIG. 2 is a front view thereof, FIG. 3 is a flowchart of a control system of an embodiment of the present invention, and FIG. 4 is a front view showing a modification of the ejection means. FIG. 5 is a plan view showing another modification of the ejection means. In the figure, 1... Packaging machine, 2... Measuring conveyance device, 3
...Export conveyor, 4...First roller conveyor, 5...Second roller conveyor, 6...Belt conveyor, 7...Discharge wall, 7'...Discharge shutter, 7''...Discharge door, 8... It's a sensor.

Claims (1)

[Claims] 1. A first conveyance path equipped with a weighing mechanism and a second conveyance path connected to the conveyance path are provided on the unloading side of a work machine that conveys objects to be weighed in a constant cycle, and a second conveyance path connected to the conveyance path is provided. In a weighing and conveying device that carries an object to be weighed onto a first conveyance path, weighs the object on the conveyance path, and transfers it to a second conveyance path, the object is transferred to the first conveyance path in a direction different from the second conveyance path. A discharging means for transferring the objects to be weighed is provided, and a sensor is provided for detecting an excessive amount of objects to be weighed or unauthorized introduction of the objects to the first conveyance path at a timing that is too early for the weighing operation. A weighing and conveying device characterized in that the ejecting means is activated when illegal import is detected. 2. The sensor is means for detecting whether or not a preset maximum weight is exceeded, and when the sensor detects that the maximum weight is exceeded, the ejecting means is activated. weighing and conveying device. 3 The sensor is a timer that counts the time from when the object to be weighed is carried into the first transport path until the weighing mechanism outputs the weighing stability signal or weighing completion signal, and the standard weighing time is set in advance in the sensor. 2. The weighing and conveying device according to claim 1, wherein the ejecting means is activated when the count exceeds the standard weighing time. 4. The sensor is a means for detecting that the next object to be weighed is carried into the first conveyance path and before the weighing mechanism outputs the weighing stability signal or the weighing completion signal, and The weighing and conveying device according to claim 1, wherein the ejecting means is activated by a sensor. 5. The above-mentioned sensor is means for detecting that the object to be weighed carried into the first conveyance path protrudes from the first conveyance path toward the work machine, and the sensor activates the discharge means. The weighing and conveying device according to item 1. 6 Claims 1, 2, and 3, wherein a pricing machine is disposed downstream of the first conveyance path,
The weighing and conveying device according to item 4 or 5.