JPS62113023A - Combination weighing apparatus - Google Patents

Abstract

PURPOSE:To achieve a higher working efficiency, by arranging a plurality of chutes of a combination weighing apparatus to switch between a plurality of discharge ports for packing. CONSTITUTION:Objects to be weighed from a conveyor 11 are supplied to an intermediate hopper 14 through a vibration plate 13a of a plurality of feeders 13 in the perimeter thereof via feeder 12. When a weighing hopper 15 is emptied, a shutter 14a of the intermediate hopper 14 are opened to weigh the objects and the empty pool hopper side shutter 15a of the two hoppers 16 and 16 is opened allowing the objects to drop and housed into the hopper 16. Based on the weighed values from the weighing machine, a combined addition is done. As a result, a plurality of shutters 16a selected for combination are opened to discharge the objects being weighed. A lift mechanism 30 operates timed to the discharge timing, the objects being weighed slide down along a moving chute 40, drop to a discharge hopper 21 via a discharge port 40b and a discharge port 19c of a fixed chute 19 to be discharged to a packing machine 23 which packs the objects.

Description

[Detailed Description of the Invention] Industrial Application Field of the Present Invention The present invention is useful for processing articles such as confectionery, fruits, vegetables, etc. whose individual weights vary (hereinafter referred to as lump articles). This invention relates to a combination weighing device used when packing a plurality of items into bags so as to maintain a constant weight.

・〈Prior art〉 (Figures 3 and 4) As is well known, a combination weighing device can reduce the weight of items that vary in individual weight (for example, confectionery, rice crackers, hailstones, peanuts, etc.) to a more or less constant weight. It is used for packaging multiple items at once, and the feeder supplies the items to be weighed to multiple weight hoppers for weighing, and the sum of the weight values from a predetermined number of weighing hoppers is calculated for all weighing hoppers. A calculation is performed on the combinations to select the combination that gives the value closest to the target weight, and the objects in the weighing hopper selected for this combination are discharged into the collection shoe 1- and collected into a lump.

That is, as shown in FIG. 3, in this type of combination weighing device, a series of intermediate hoppers 1, weighing hoppers 2, pool hoppers 3, etc. arranged above and below are arranged in an annular manner around a circular feeder 4. Arranged in multiple rows.

Collecting stacks 1 to 5 are arranged below, and the objects to be weighed in the plurality of rows of pool hoppers 3 selected for combination are discharged and dropped into the collecting chute 5 and collected. Then, for example, it is discharged from a discharge hopper 6 disposed below the collection chute 5 to a packaging machine 7 located below.

Therefore, the collection chute 5 can be used for all pool hoppers 3
In order to be able to receive the objects to be weighed discharged from the pool hopper, it is inevitably large in size, and therefore the falling distance from the pool hopper 3 is also large, and the distance 1111L over which the objects to be weighed slide down in the collection chute 5 is also large. Therefore, it takes a considerable amount of time after the object to be weighed is discharged from the pool hopper 3 until it reaches the packaging machine 7. Therefore, during this time, the objects to be assembled next time cannot be discharged to the collection chute 5.

However, in the combination stamp weighing device, it is necessary to shorten the time required for discharging objects to be weighed as much as possible in order to increase work efficiency. For this reason, there has been a collection hopper as shown in FIG. 4 in the past. That is, a cylindrical intermediate shutter 8 is provided to the right of the bottom surface inscribed in approximately the center of the inner circumferential wall of the truncated conical collecting chute 5, and the objects to be weighed II taken out from the pool hopper 3 are transported to the intermediate shutter. 8 outer peripheral wall 8a and collection hopper 5
They are collected in a space 9 consisting of and temporarily stored.

Then, the intermediate shutter 8 is moved by a lifting mechanism (not shown).
After the object to be weighed is discharged from the space 9, the intermediate shutter 8 is returned downward and the next combined object to be weighed is discharged from the pool hopper 3. , almost doubling the efficiency of the discharge operation.

<Problems to be Solved by the Present Invention> However, in the above-mentioned conventional combination weighing device, there is a limit to the working speed because it takes time for the object to be slid down by the intermediate shutter 8J. After being stopped by the intermediate shack 8, the intermediate shutter 8 turns upside down and slides down again, so the discharge speed to the packaging machine 7 is slowed down.
There were limits to work speed.

OBJECT OF THE INVENTION The present invention was made to solve the above-mentioned problems, and an object of the present invention is to provide a combination weighing device that has a simple configuration and efficiently discharges objects to be weighed. .

・'An embodiment of the present invention> (FIGS. 1 and 2) An embodiment of the present invention will be described below based on the drawings.

FIG. 1 is a schematic diagram showing an embodiment of the present invention.

In the figure, 11 is a conveyor for conveying objects to be weighed;
2 is a circular umbrella-shaped diaphragm 1 located below the conveyor 11
2a, a supply device consisting of a vibrator 12b for vibrating the diaphragm 12a, and 13, a diaphragm 13a disposed around the periphery of the circular umbrella-shaped diaphragm 12a, and a vibrator for vibrating the diaphragm 13a. 13b. Supply device 13
A plurality of diaphragms 12a are arranged along the circumference of the diaphragm 12a of the supply device 12.

An intermediate hopper 14 is arranged below the outlet of the diaphragm 13a of each feeding device 13, a weighing hopper 15 is arranged below the intermediate hopper 14, and each weighing hopper 15 has two
pool hoppers 16.16 are arranged.

Reference numeral 17 denotes a housing in which a measuring device (not shown) of the weighing hopper 15 is housed, and its peripheral wall is fixed to the base 18 by a plurality of supports (not shown). The intermediate hopper 14 is fixed to the upper end of the housing 17, and the pool hopper 16 is fixed to the upper end of the housing 17.
is fixed at the bottom edge of the

These pool hoppers arranged in a circle 16.16,
... At the bottom, there is a substantially forest-shaped opening 19a with a circular opening 19a to receive the M1 amount of material discharged from all the pool hoppers 16. A fixed chute 19 is arranged.

The fixed chute 19 has a discharge port 19b at the lower center of -'E.
The peripheral wall slightly above the discharge rl 19 b has a cylindrical shape that penetrates the peripheral wall orthogonally,
A downwardly bent discharge pipe 19C is formed.

Discharge hoppers 20 and 21 are arranged below the discharge port 19b and the discharge pipe 19C, respectively.
A packaging machine 22, 23 is arranged below.

Further, a lifting mechanism 30 is attached to the bottom of the housing 17 so as to be located in the -F direction of the opening 19a of the fixed shoe 1-19. The lifting mechanism 30 includes a fixed chute 19
It has an elevating shaft 32 that is positioned approximately above the center of the guide tube 31 and inserted into the guide tube 31 so that it can be moved up and down.

The lower end of the lifting shaft 32 is connected to the opening 40a of the moving chute 40.
It is fixed to a connecting plate 41 that is horizontally suspended.

The movable chute 710 is shaped like a grove, which is slightly smaller than that of one fixed chute, and has an L-side opening 4. Oa is inscribed in the fixed seat 19.

At the bottom of the movable chute 40, there is a fixed chute 1.
A discharge port 4011 is provided very close to the frontage surface of the two discharge pipes 19C.

The lifting mechanism 30 is used to raise and lower the lifting shaft 32 in synchronization with the discharge of the pool hopper 16. For example, as shown in FIG. i1 A first link 33 that is movably connected, and a second link 35 that has one end rotatably connected to the other end of the first link 33 and the other end rotatably attached to the fixed shaft 34. One end is rotatably connected to an intermediate portion of the second link 35, and the other end is rotatably connected to an eccentric shaft 37 of a rotating plate 36 fixed to a drive shaft of a motor (not shown). The link mechanism includes a third link 38 and a third link 38. Therefore, when the rotating plate 36 is rotated by the drive of the motor, the second link 35 is rotated about the fixed shaft 3/I, so that the upper end of the movable chute 40 is fixed to the elevating shaft 32 as shown by the solid line. It moves in the vertical direction from the position where it contacts the sheets t-1 to t-19 to the position shown by the chain line.

In FIG. 2, 14a is the shutter of the intermediate hopper 14, 15a is the shutter of the cutting hopper 15, and 16a is the shutter of the pool hopper 1G.

<Operation of the embodiment> Next, the combination i! of the above configuration! The operation of nt m HH will be explained.

=7- The objects to be weighed are supplied from the conveyor 11 via the supply device 12 to the diaphragms 13a of the plurality of supply devices 13 around the supply device 1112, and are supplied from each diaphragm 13a to the intermediate hopper 14.

When the weighing hopper 15 becomes empty, the shutter 14a of the intermediate hopper 14 opens, and the objects to be weighed in the intermediate hopper 14 fall into the weighing hopper 15. The object to be weighed is weighed in the weighing hopper 15, and the shutter 15a on the empty pool hopper side of the two pool hoppers 16.16 is opened, and the object to be weighed falls and is stored in the pool hopper 16. Combinations are performed based on the measured values from the weighing machines, and as a result, the shutters 16a of the plurality of pool hoppers 16 selected for the combination are
opens and the object to be weighed is discharged.

The RfR mechanism 30 operates in synchronization with the discharge of objects to be weighed from the pool hopper 16, and moves the moving chute 710.
is lowered and its upper end abuts against the fixed chute 19.

The object to be weighed that has fallen from the pool hopper 16 slides down along the movable chute 40 and reaches the discharge port 4 of the movable chute 40.
1 from 0b through the discharge pipe 1LC of the fixed chute 19.
71 and falls into the discharge hopper 21, and is discharged from the discharge hopper 21 to the packaging machine 23 for 1 time to be packaged.

Next, when the shutters 16a of the plurality of pool hoppers selected in combination are heard, the movable chute/IO rises in synchronization with this. Therefore, the discharged object to be weighed slides down along the fixed chute 19, falls from the discharge port 19b of the fixed chute 19 into the discharge hopper 20, is taken out 111 from the discharge hopper 20 to the packaging machine 22, and is packaged. be done.

Thereafter, in the same manner, the items to be weighed that have been matched and selected are alternately discharged to the two packaging machines 22 and 23 and packaged.

<Other embodiments of the present invention> In the above embodiments, the objects to be weighed were alternately discharged to two packaging machines, but by further adding a moving chute, it is possible to utilize a plurality of packaging machines. You can also do that.

Effects of the Present Invention> As described above, according to the combination weighing device of the present invention, the plurality of chutes are switched to the plurality of discharge ports for discharging and packaging, so the work efficiency can be significantly improved.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of the combination weighing device of the present invention, FIG. 2 is a sectional view showing the main parts thereof, FIG. 3 is a schematic configuration diagram of a conventional combination weighing device, and FIG. FIG. 1 is a schematic configuration diagram of a conventional combination weighing device equipped with an intermediate shutter. 11... Conveyor, 12... Feeding device, 13... Feeding device, 14... Intermediate hopper, 15... Measuring hopper, 16・・・・・・
Pool hopper, 19...Fixed chute, 19b
...Discharge port, 19c...Discharge pipe, 20
．． 21...Discharge hopper, 22.23...
・Wrapping machine, 30... Lifting mechanism, 32...
・Elevating axis, 40...Moving chute, 40b...
...Discharge port, 41...Connection plate. Patent Applicant Anritsu Corporation Agent Patent Attorney Makoto Hayakawa 2 Figure 19b Figure 3

Claims (1)

[Claims] A plurality of combination hoppers for weighing and discharging objects to be weighed; and a plurality of combination hoppers that receive objects to be weighed discharged from the plurality of combination hoppers from an upper side, drop them along an inner wall, collect them, and discharge them. In a combination weighing device equipped with a collecting chute, the collecting chute is configured of a plurality of chutes that move relative to each other in the vertical direction and have individual discharge ports, and the upper and lower chutes are brought into close contact with each other, so that the A combination weighing device characterized in that the objects to be weighed are collected in the chute, and the objects to be weighed are collected in the lower chute by separating the peripheral edges of the upper and lower chutes.