JPH0524190Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention is a weighing device that is used when weighing objects of random length, such as carton cases, on a conveyor of an automatic transport line. It is related to the device.

BACKGROUND ART Conventionally, as shown in FIG. 4, for example, a weighing device of this type is provided with a weighing device 31 having a weighing section conveyor 30 on its upper part.
0 is provided with a carry-in conveyor 32 that is linearly aligned and connected to the starting end of the conveyor belt 0, and a carry-out conveyor 33 is provided that is linearly aligned and connected to the terminal end of the conveyor belt.

Then, the object to be weighed 34 transported by the carry-in conveyor 32 is stopped on the weighing section conveyor 30, and after being weighed to a desired weight by the weighing device 31, it is sent onto the carry-out conveyor 33. In this case, the length 1 (weight) of the object to be weighed 34 is random, and the weighing range A (length of the weighing section conveyor 30, etc.) is set so that the weighing section conveyor 30 can weigh the maximum length. The length is set larger than the maximum length of the object to be weighed 34.

Problems to be solved by the invention According to the above conventional type, the weighing section conveyor 30
Not only does the scale 31 including the scale become larger, but as shown in FIG. will deviate greatly,
Therefore, actual weighing cannot be performed with high precision.

An object of the present invention is to provide a weighing device that can be miniaturized as a whole and that can perform weighing with high accuracy.

Means for Solving the Problems In order to achieve the above object, the weighing device of the present invention is provided with a weighing device having a weighing section conveyor on the upper part, and relay conveyors are installed outside the starting and ending ends of the weighing section conveyor. A length detection device is provided on the upper side of the front relay conveyor, and a plurality of stop position detection devices for the objects to be weighed are provided on the sides of both relay conveyors. The position detecting device is of a photoelectric type in which a scanning line passes above the elevated relay conveyor, and the corresponding stop position detecting device is configured to detect based on the detection signal from the length detecting device.

According to the configuration of the present invention, the type or length of the transported object to be weighed is detected by the length detection device at the top of the front relay conveyor, and based on the detection, the object to be weighed is moved to the corresponding stop position. When the detection device is activated, the length center is aligned with the center of the weighing device and the weighing device is stopped.

If the length of the object to be weighed is such that it fits within the weighing section conveyor, the desired weighing is performed in that state. If the object is too long to fit, both relay conveyors are lowered, and the object to be weighed is deposited only on the weighing section conveyor and the desired weighing is performed. The object to be weighed, which has been weighed as expected, is conveyed to the downstream side when the relay conveyor is in the raised position.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

The weighing device 1 includes a weighing device 3 having a weighing section conveyor 2 on the upper part, a front relay conveyor 4 which is arranged in a straight line outside the starting end of the weighing section conveyor 2 and is movable up and down, and the weighing section. It consists of a rear relay conveyor 5 which is arranged in a straight line outside the terminal end of the conveyor 2 and is movable up and down. Both relay conveyors 4 and 5 are disposed via lift devices 6 and 7, respectively, and are configured so that when they are raised, the weighing section conveyor 2 and the conveying surface are at the same level.

A plurality of stop position detection devices 9 and 10 for the object to be weighed 8 are provided on the sides of both relay conveyors 4 and 5, respectively, and these devices are of a photoelectric type or the like.

On the upper side of the front relay conveyor 4, an input conveyor 11, a side conveyor 12, and a carry-in conveyor 13 are arranged in this order from the top and aligned in a straight line with the front relay conveyor 4, and A discharge conveyor 14 is disposed on the downstream side of the rear relay conveyor 5 so as to be linearly aligned with the rear relay conveyor 5. Therefore, conveyors 11, 12, 13,
Straight conveyance path 1 by groups 4, 2, 5, 14
form 5.

An input setting device 1 is installed on the side of the input conveyor 11.
6 is provided, and a length detecting device 17 is provided on the side of the carry-in conveyor 13. A diverter 18 and an auto-labeler 19 are disposed on one side of the discharge conveyor 14, and a discharge conveyor 20 is disposed orthogonally on the other side facing the diverter 18.

In the embodiment described above, the objects to be weighed 8 on the input conveyor 11 are input into the input setting device 16 by type, for example. After the position of the object to be weighed 8 in the width direction is corrected while being conveyed by the side conveyor 12, the length L is detected by the length detection device 17 on the carry-in conveyor 13. Next, the object to be weighed 8 is sent into the weighing device 1, but at this time both relay conveyors 4 and 5 are raised as shown by the imaginary lines in FIG. 1, so that the object is carried in without any problem.

Based on the detection signal from the length detection device 17, the corresponding stop position detection devices 9, 10 detect and move, so that each conveyor 2, 4, 5 is stopped, and the object to be weighed is placed in the center 21 of the weigher. It can be stopped by aligning the length center of 8. Incidentally, overshooting may be corrected by inching driving each of the conveyors 2, 4, and 5 in the opposite direction.

After stopping the object to be weighed 8, the lift device 6,
7, both relay conveyors 4 and 5 are lowered as shown by solid lines in FIG. 1, and the weighing object 8 is deposited only on the weighing section conveyor 2. As a result, the object to be weighed 8 can be weighed, but at this time, the input setting device 1
A weight check is performed by comparing the signal from 6 and 6.

After the intended weighing, both relay conveyors 4 and 5
is raised again, and the object to be weighed 8 is sent out to the carry-out conveyor 14 side by the forward rotation of each conveyor 2, 4, 5. When the weighed object 8 is determined to be defective by the weight check, the diverter 18 is activated, and the defective weighed object 8 is delivered to the delivery conveyor 20. Furthermore, for non-defective items, the auto-labeler 19 is activated, and the weighed items 8 are transported to the sorting line.

By depositing the object to be weighed 8 on the short weighing section conveyor 2 and detecting it in this way, the weighing characteristic 22 falls within the object to be weighed range 23 as shown by the dotted line in FIG.

Note that when the length L of the object to be weighed 8 is of a type that falls within the length of the weighing section conveyor 2, the lifting and lowering of both relay conveyors 4 and 5 is omitted.

Effects of the Invention According to the present invention having the above-mentioned configuration, it is possible to downsize a weighing device having a weighing section conveyor while also weighing a long object to be weighed. It is possible to weigh within this range and perform accurate weighing.

[Brief explanation of drawings]

Figures 1 to 3 show an embodiment of the present invention; Figure 1 is a side view, Figure 2 is a plan view, Figure 3 is a weighing characteristic diagram, and Figure 4 is a side view of a conventional example. be. 1... Weighing device, 2... Weighing section conveyor, 3...
...Weighing device, 4... Front relay conveyor, 5... Rear relay conveyor, 6, 7... Lift device, 8... Object to be weighed, 9, 10... Stop position detection device, 11...
...Input conveyor, 12...Wide conveyor, 13...
... Carrying in conveyor, 14... Carrying out conveyor, 15...
... Conveyance route, 16 ... Input setting device, 17 ... Length detection device, 18 ... Diverter, 19 ... Auto labeler, 20 ... Payout conveyor, 21 ... Weigher center, 22 ... Weighing characteristics, 23 ...Weighing object range, L...Length.

Claims (1)

[Scope of utility model registration request] A weighing machine having a weighing section conveyor on the upper part is provided,
Relay conveyors are installed outside the start and end ends of this weighing section conveyor so that they are arranged in a straight line and can be raised and lowered, and a length detection device is installed on the upper side of the front relay conveyor, and a length detection device is installed on the upper side of the front relay conveyor, and A plurality of stop position detecting devices for the object to be weighed are provided at each of the stop position detecting devices, and these stop position detecting devices are of a photoelectric type in which a scanning line passes above the elevated relay conveyor, and the stop position detecting devices respond based on the detection signal from the length detecting device. A weighing device characterized in that a stop position detection device is configured to perform a detection movement.