CN86101919A - Have the meausring apparatus of improveing weighing bucket - Google Patents

Abstract

One weighing bucket receives the goods that incline and from superincumbent maintenance hopper, and makes the lower end load elements produce an electronic signal, the weight of representative goods in weighing bucket.The low-pressure air of one the big volume that is produced by a nozzle by goods after the weighing scans out weighing bucket.Owing to utilize air to come the emptying weighing bucket, weighing bucket need not have door or other movable parts, so can be caused with high rigidity and high free-running frequency, lowers the low-frequency disturbance of weight signal, and improve the accuracy of those signals, and reduce the required time of weighing cycle.

Description

Have the meausring apparatus of improveing weighing bucket

The present invention is usually about being used for the device of weighing goods, more especially to come the product of weighing before automatic packaging machine packing with the computerized scale pan.

Usually, the computerized scale pan of mentioned kind has comprised a series of (for example 10) so-called weighing bucket, each hopper getting in touch one under load elements or other devices represent the weight of goods in the hopper to produce an electronic signal.Being positioned on each weighing bucket is a maintenance hopper, and it fills some products that will pack.In each cycle, nationality the maintenance hopper of opening in a flash last, allows product fall into weighing bucket, and each empty weighing bucket just can fill with goods.Falling into, the weight of each weighing bucket goods in fact is less than the goods general assembly (TW) that is placed on each parcel by this packaging machine.

After all weighing buckets are filled with, one computer is made a response to the weight signal that is produced by the different loads element, the weight of weighing bucket various combination has been added, select the specific combination of hopper then, the minimum statistics weight that this combination suits the requirements and filled with parcel provides the minimum weight that exceeds simultaneously.The weighing bucket of this specific combination is drained then, and goods inside are sent to packaging machine, are placed in the parcel.

The weigh-hatching plant that is used for the general commercially available computerized scale pan comprises door, and after goods were by weighing, door can move on to the open site made goods incline to from hopper.Because the existence of door and needs are opened weighing bucket, the rigidity of hopper can lower, and its free-running frequency can reduce.And the high frequency interference of hopper can filter from load elements with electronics method in a relatively easy mode, and the low-frequency disturbance that is produced by the class hopper has a quite low free-running frequency, and this gets rid of than difficult, and may cause inaccurate reading.In addition, the door of this class weighing bucket must closure just can be filled again, the required time has increased and to be used for the required time of whole weighing cycle so be used for closing door.

General purpose of the present invention provides the meausring apparatus of above-mentioned general kind, and it has the novel and weighing bucket improved, and hopper, has been avoided opening the needs of hopper and got rid of the needs of a movable door by the sky that inclines with a unique way.Because do not have the existence of door, hopper can cause rigidity and firm, and a high free-running frequency is arranged, influence the low-frequency disturbance of weighing signal with attenuating, thereby increase the accuracy of the scale pan.Moreover, do not have the weighing bucket of door and can behind the sky that just inclines, be filled again immediately, and can not incur loss through delay this cycle because of the closure that waits door.

Of the present invention one is foregoing in order to obtain than specific purposes, and a streamlined and firm dish-shaped weighing bucket is provided, and it does not have moving-member, and with one big strand low-pressure air, goods is scanned out from hopper.

Also having another purpose is to make a low pressure, and the air of high flow capacity is used for goods are scanned out hopper, still uses from the pressurized air of one relatively little volume of the pressurization energy.

This invention also belongs to and is used for opening and closing the novel method measure of supporting hopper, can not blow weighing bucket and produces the weight signal of a mistake.

These and other purpose of the present invention and advantage from hereinafter being described in detail together with accompanying drawing, will become clearly.

This single accompanying drawing is a diagrammatic side view, partly demonstrates an automatic packaging machine, with and showed and new and the meausring apparatus of having improved combined exclusive characteristics of the present invention.

For graphic purpose, meausring apparatus 10 of the present invention has been presented at accompanying drawing, and it combines with an automatic packaging machine 11, is used for making parcel 12 and parcel being filled goods 13.At this concrete example, goods are little food, for example potato slices or the thin slice or the frizz of similarly light relatively and loosely packing.

Packaging machine 11 be belong to a known design and may, for example, belong to and be disclosed in any of the United States Patent (USP) 4423585 that covers this people such as (Monsees).Here, this enough illustrates packaging machine making parcel High-Speed Automaticly, and comprises a funnel of upwards dehiscing 14, and it receives every batch of goods 13 of weighing off and on, after being wrapped to form of order, with regard to the batch of material of boot sequence thereunto.For structure and operation to the packaging machine that has a similar funnel 14 have a detailed announcement, need according to patent to this people such as grade (Monsees) of the above-mentioned illiteracy of mentioning.

The meausring apparatus 10 that illustrates clearly forms the part of the computerized scale pan, and that batch goods that these pan of a steelyard weighing goods 13 and assurance are stored in each parcel 12 always meet a specific minimum or statistical weight, exceed that weight simultaneously as small as possible.Usually, this meausring apparatus comprises a maintenance container of upwards dehiscing or a hopper 15, is suitable for holding the goods from the top loader by receiving, this loader diagrammatically is presented at 16.Keeping hopper is to open periodically, and some goods are fallen into a weighing container hopper 17 below, and it is placed on a load elements 18 or other the power-electric signal converters.The signal that is produced by load elements has been represented the weight of goods in the hopper 17, is sent to a microprocessor or similar device, has gone up the square frame of mark " controller " in conjunction with notes in the accompanying drawings.

In a typical scale pan, ten groups keep hopper 15, and weighing bucket 17 and load elements 18 are being got in touch funnel 14, and the weight signal of each weighing bucket is sent to microprocessor.Through maintenance hopper up, be stored in the product weight of each weighing bucket, just each parcel 12 is carried the part of full goods general assembly (TW) at last.In present example, the goods of not understanding three ounces of mistake are fallen into each weighing bucket more, and parcel possibility itself for example, is loaded with 12 ounce's goods simultaneously.

When all weighing buckets 17 have received goods 13, microprocessor with might make up the signal of load elements representative added, and the best of breed of selection weight meets the statistics package weight, reduces overfill simultaneously as far as possible.Microprocessor produces a signal then and causes specific hopper 17 emptyings that form selected combination.In a fixed cycle, for example, microprocessor may make the second, the four, and the the five, the seven and the 8th weighing bucket emptying expired selected and emptying in the cycle afterwards yet remaining hopper keeps carrying.

The accuracy of this scale pan is the accuracy that relies on the weight signal of receiving from each load elements 18.When toppling over goods 13 at hopper, the vibration that awards weighing bucket 17 causes the interference at the load elements signal.The high frequency interference that surpasses 30 hertz can filter from signal with electronics method, and low-frequency disturbance is not easy to filter, and can influence the accuracy of signal.

According to the present invention, weighing bucket 17 is drained in a distinctive mode, make hopper be caused rigidity and firm, and do not have movable part, so hopper can have a high free-running frequency to lower the interior low-frequency disturbance of load elements 18 signals.Moreover the method for weighing bucket emptying reduces the needed time of whole weighing cycle, and is so the meausring apparatus 10 of this invention is soon after the device that has earlier, also more accurate.

More specifically, weighing bucket 17 of the present invention be one firm, dish-like container, it is to be formed, and is streamlined, so that can make goods 13 by one low-pressure air, discharges from hopper.As shown, hopper comprises the diapire 22 of a bent type, and it is to be supported at one below and relate to the support 23 of load elements 18.The upper surface of diapire 22 is that recessed ground is crooked, falls the into goods of weighing bucket with reservation, simultaneously when emptying casks, allows that goods comply with outstanding diapire and swept away.Two sidewall 25(that laterally place and up stretch have only shown one of them) lower end be firmly to be connected diapire 22, and with latter's coact, constraint goods.Hopper may be the stainless structure of a monoblock, or different wall pieces makes dividually, and firmly welding is together again.

Weighing bucket 17 directly is in and keeps under the hopper 15 and the location, and therefore the goods 13 that fall from the maintenance hopper stop thereon and kept hopper to limit.The left-end point of weighing bucket is placed on above the funnel 14, has constituted outlet opening 26.

Add gas jets 30 from weighing bucket 17 13, one of products of discharge and be positioned on the hopper, abut the right terminal of it, down point to, make inswept this hopper of one air energy.Nozzle may be, for example belong to the kind that eddy current company (Vortex Corporation) is sold, be defined as model 900 and " deny-obtain " (" Model900 F Lo-Gain ") nozzle, this nozzle is the air that is adapted to receive relative high pressure (for example per square inch 40 pounds), and it is the pressurized air through filtering from a source of the gas 35.When nozzle was produced pulsation, pressure-air was taken away ambient air, thereby has produced a relatively low pressure from nozzle, the air of high flow capacity.This shows that the compressed-air actuated consumption that has filtered can maintain seldom, but side by side, produced general quite soft air, enough light and frangible goods are scanned out hopper, and do not damage these goods.

To be in relation to the specific weighing bucket 17 of nozzle selected whenever microprocessor sends signal indication, and will be drained, and nozzle 30 just has the pressurized air pulsation.When the inswept hopper of air, it impacts goods 13, promotes goods in hopper from right to left, and goods are discharged outlet opening 26, so that goods can fall into funnel 14.When goods are discharged from, guide plate 40 is limiting goods, and the guiding goods enter funnel.Guide plate comprises that one stretches upwards part 41 and is connected funnel on one side, and includes parts 42 that normally flatly stretch again, and its blocks the room between funnel upper end and the weighing bucket upper end.

Through one very brief predetermined, after the time limit of enough emptying weighing buckets 17, microprocessor causes that nozzle 30 cuts off this strand air.Subsequently, keep hopper 15 to open immediately and fill weighing bucket once more, do not close weighing bucket because the maintenance hopper need not be waited for door or analog.Advantageously, but keep hopper 15 to be closed by the door 44 that a straight line moves, the reciprocating type air impeller 45 of this Men Youyi moves forward and backward under the maintenance hopper.Because door is mobile point-blank, it produces very little blowing effect to weighing bucket, so avoided producing the weight signal of a mistake.In addition, there is not blowing that the goods 13 in weighing bucket can promptly be settled down, so after door 44 was closed, the goods weighing just can begin immediately.

Obviously draw from noted earlier, the present invention provides a meausring apparatus 10 that weighing bucket 17 is arranged, and weighing bucket has a high free-running frequency, and it has improved the accuracy of weight signal, does not get rid of low-frequency disturbance and do not need to rely on complicated method.Because weighing bucket has not had movable part, simple in structure, small and exquisite and economical, do not have inconvenience during use, and before annotating dress again, need not return to a closure state.

Claims (7)

1, meausring apparatus, comprise that is used to keep the container by the weighing goods, be used for every batch of goods intermittently are delivered to the device of described container, getting in touch described container and each batch product weight in the container is being produced a device of representing signal, also has the device that after goods are by weighing, receives every batch of goods from described container, the improvements of described meausring apparatus comprise, pneumatic means guides into described container and a collection of goods in it off and on to an airflow, and those goods are discharged to described receiving trap from described container.

2, according to the described meausring apparatus of claim 1, it is characterized by described pneumatic means and comprise that one is supplied with compressed-air actuated nozzle, so that bring out a low pressure, the surrounding air of high flow capacity flows out described nozzle.

3, according to the described meausring apparatus of claim 1, it is characterized by the sidewall that described container comprises pair of upright, one is stretched in and firmly is connected on the diapire of this sidewall lower end, it has the upper surface of bow, between the described sidewall of described container one end, constitute a horizontal outlet opening, described pneumatic means has one to be positioned on the described container and contiguous its relative terminal nozzle, causes that air flow complying with described diapire goods are scanned out outlet opening to receiving trap.

4, meausring apparatus comprises that one is used to keep the container of upwards dehiscing by the weighing goods, be used for a collection of goods are fallen into off and on the device of described container, being used to produce an electronic signal represents every batch of product weight in the container and is arranged in device under the described container, with the device that after goods are by weighing, receives every batch of goods from container, it is characterized in that it is the diapire of bow that described container has a upper surface, the upright placement of pair of sidewalls and its lower end firmly are connected to described diapire, there is an outlet opening to be formed between the sidewall at container one end, be positioned on the described container with pneumatic means and contiguous its another end, be used as one large volume, low-pressure air intermittently down guides and enters described container, is complying with described diapire goods are scanned out outlet opening to receiving trap.

5, according to the described meausring apparatus of claim 4, it is characterized by described pneumatic means and comprise that one has the nozzle of pressurized air supply, be used to make pressurized air to take away surrounding air and bring out the mobile device that flows out described nozzle of low pressure of a surrounding air.

6, according to the described meausring apparatus of claim 4, it is characterized by the described device that is used for falling down off and on goods and comprise that has a receiver that opens lower end and upwards dehisce, with be used for the alternately device of the described receiver lower end of open closed, and comprise a supported door, under described receiver lower end, move as straight line, with under described receiver, between unlatching and make-position, move the device of described door point-blank.

7, according to the described meausring apparatus of claim 4, it is characterized by described receiving trap and comprise a funnel that is positioned under the described container and upwards dehisces, one side of funnel is adjacent to an end of described container, goods guide plate have one substantially horizontal component be positioned on funnel and the container outlet opening, and the space above container is stretched over funnel, described guide plate also has a vertical component substantially, down be stretched over the another side of funnel from described horizontal component, described guide plate is being guided the goods of discharging from described container, and guides those goods to enter described funnel.