JPH0435011B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field of the Present Invention> The present invention is capable of handling articles such as confectionery, fruits, vegetables, etc. whose individual weights vary (hereinafter referred to as lumps) at approximately constant weight. This invention relates to a combination weighing device used when packing a plurality of items into bags to determine their weight.

<Prior art> (Figures 3 and 4) As is well known, the combination weighing device is used to weigh items that vary in individual weights (for example, sweets, rice crackers, etc.).
It is used to package multiple pieces of food (gray, peanuts, etc.) so that the weight is approximately constant, and the items to be weighed are fed to multiple weighing hoppers by a feeder and weighed. , calculate the sum of the weighing values from a predetermined number of weighing hoppers for all combinations, select the combination that gives the value closest to the target weight, and display the objects to be weighed in the weighing hoppers selected for this combination in the set shoot. Drain and combine.

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 vertically are arranged in a plurality of annular rows around a circular feeder 4. It is located. A collecting chute 5 is disposed below the weighing chute 5, 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. For example, group shoot 5
It is discharged from a discharge hopper 6 disposed below to a packaging machine 7 located below.

Therefore, the collecting chute 5 inevitably becomes large in size so as to be able to receive the objects to be weighed discharged from all the pool hoppers 3. Therefore, the falling distance from the pool hopper 3 becomes large, and the collecting chute 5 Since the distance L for sliding down the object to be weighed is also large, it takes a considerable amount of time from when the object to be weighed is discharged from the pool hopper 3 until it reaches the packaging machine 7. Therefore, the next combined objects to be weighed cannot be discharged to the collection chute 5 during this time.

However, in a combination 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, a collection hopper as shown in FIG. 4 has conventionally existed. That is, a cylindrical intermediate shutter 8 having a bottom surface inscribed in approximately the center of the inner circumferential wall of the truncated conical collecting chute 5 is provided, and the objects to be weighed discharged from the pool hopper 3 are transferred to the outer circumferential wall of the intermediate shutter 8. 8a and gathering hopper 5
They are collected in a space 9 consisting of and temporarily stored.

Then, the intermediate shutter 8 is moved upward by a lifting mechanism (not shown), and 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 moved. By discharging items from pool hopper 3, the efficiency of the discharge work was almost doubled.

<Problems to be Solved by the Present Invention> However, in the conventional combination weighing device as described above, there is a limit to the working speed because it takes time for the object to be weighed to slide down to the intermediate shutter 8. After being stopped at 8, the intermediate shutter 8 rises and slides down again, so the speed of discharge to the packaging machine 7 is slow and there is a limit to the working speed.

<Object of the present invention> The present invention was made in order to solve the above-mentioned problems, and therefore, it is an object of the present invention to provide a combination weighing device that has a simple configuration and efficiently discharges objects to be weighed.

<One 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 configuration diagram showing an embodiment of the present invention.

In the same figure, 11 is a conveyor for conveying objects to be weighed, 12 is a supply device consisting of a circular umbrella-shaped diaphragm 12a located below the conveyor 11, and a vibrator 12b for vibrating the diaphragm 12a, and 13 is a supply device comprising the circular umbrella-shaped diaphragm 12a that vibrates the diaphragm 12a. A diaphragm 13a arranged around the periphery of the umbrella-shaped diaphragm 12a, and a vibrator 13 that vibrates the diaphragm 13a.
This is a feeding device consisting of b. A plurality of supply devices 13 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 supply device 13.
A weighing hopper 15 is arranged below the weighing hopper 15, and two pool hoppers 16 and 1 are arranged below the weighing hopper 15.
6 is placed.

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,
The pool hopper 16 is fixed to the lower end of the housing 17.

These pool hoppers 16 arranged in a circle,
16, below, all pool hoppers 1
A stationary chute 19 approximately in the shape of a mortar is provided with a circular opening 19a so as to receive the object to be weighed discharged from the chute 6.

The fixed chute 19 has a discharge port 1 at the lower center thereof.
9b, and a discharge pipe 19c is formed in the circumferential wall slightly above the discharge port 19b, penetrating orthogonally to the circumferential wall, formed in a cylindrical shape, and bent downward.

Discharge hoppers 20 and 21 are arranged below the discharge port 19b and the discharge pipe 19c, respectively, and packaging machines 22 and 23 are disposed below the discharge hoppers 20 and 21, respectively.

Furthermore, a fixed chute 19 is provided at the bottom of the housing 17.
A lifting mechanism 30 is attached so as to be located above the opening 19a. The lifting mechanism 30 is
It has an elevating shaft 32 located approximately above the center of the fixed chute 19 and fitted into a guide tube 31 so as to be able to move up and down.

The lower end of the elevating shaft 32 is fixed to a connecting plate 41 that is horizontally suspended in the opening 40a of the movable chute 40.

The movable chute 40 has a slightly smaller mortar shape than the fixed chute 19, and the upper opening 40a is inscribed in the fixed chute 19.
Further, a discharge port 40b is provided at the lower part of the movable chute 40 so as to be very close to the opening surface of the discharge pipe 19c of the fixed chute 19.

The elevating mechanism 30 is for elevating and lowering the elevating shaft 32 in synchronization with the discharge of the pool hopper 16. For example, as shown in FIG. a first link 33 connected to the first link 33;
A second link 3 whose one end is rotatably connected to the other end and whose other end is rotatably attached to the fixed shaft 34
5, one end is rotatably connected to the intermediate portion of the second link 35, and the other end is rotatably connected to an eccentric shaft 37 of a rotary plate 36 fixed to the drive shaft of a motor (not shown). The third link 38 is provided with a link mechanism consisting of a third link 38. Therefore, when the rotating plate 36 is rotated by the drive of the motor, the second link 35
rotates around the fixed shaft 34, whereby the elevating shaft 32 moves toward the movable chute 40 as shown by the solid line.
moves in the vertical direction from the position where the upper end thereof abuts against the fixed chute 19 to the position shown by the chain line.

In addition, in FIG. 2, 14a is the intermediate hopper 1.
4, 15a is the shutter of the weighing hopper 15, and 16a is the shutter of the pool hopper 16.

<Operation of Example> Next, the operation of the combination weighing device having the above configuration will be described.

The object to be weighed supplied from the conveyor 11 is supplied to the diaphragms 13a of a plurality of supply devices 13 around the supply device 12 via the supply device 12, and each diaphragm 13
The intermediate hopper 14 is fed from a.

When the weighing hopper 15 is empty, the intermediate hopper 14
The shutter 14a opens, and the object to be weighed in the intermediate hopper 14 falls 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. Combination addition is performed based on the weighing values from the weighing machines, and as a result, the shutters 16a of the plurality of pool hoppers 16 selected for the combination are opened and the objects to be weighed are discharged.

The elevating mechanism 30 operates in synchronization with the discharge of objects to be weighed from the pool hopper 16, and the movable chute 40 descends 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, passes through the discharge port 40b of the movable chute 40, passes through the discharge pipe 19c of the fixed chute 19, falls to the discharge hopper 21, and is packaged from the discharge hopper 21. It is discharged to the machine 23 and packaged.

Next, when the shutters 16a of the pool hoppers selected in combination open, the movable chute 40 rises in synchronization with this. Therefore, the discharged object to be weighed slides down along the fixed chute 19 and reaches the discharge port 19 of the fixed chute 19.
b, it falls to the discharge hopper 20, and is discharged from the discharge hopper 20 to the packaging machine 22 where it is packaged.

Thereafter, in the same manner, the objects to be weighed whose combinations have been selected are alternately discharged to the two packaging machines 22 and 23 and packaged.

<Other embodiments of the present invention> In the above embodiments, objects to be weighed are alternately discharged to two packaging machines, but by further adding a moving chute, multiple packaging machines can be discharged. You can also use it.

<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. 1 is a schematic configuration diagram of a conventional combination weighing device equipped with an intermediate shutter. 11... conveyor, 12... supply 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...packaging machine, 30...lifting mechanism, 32...lifting shaft, 40...
...Movement chute, 40b...Discharge port, 41...Connection plate.

Claims (1)

[Scope of Claims] 1 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 and drop them along an inner wall to collect them. In a combination weighing device equipped with a collecting chute for discharging, the collecting chute is relatively moved in the vertical direction;
Consisting of a plurality of chute with individual discharge ports, by bringing the periphery of the upper and lower chute into close contact, the object to be weighed is collected in the upper chute, and the periphery of the upper and lower chute is spaced apart. A combination weighing device characterized in that objects to be weighed are collected in a lower chute.