JP2004109078A - Combined metering device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve workability during cleaning, reduce the size and cost of a device and prevent the breakage of articles to be metered. <P>SOLUTION: A channel 8 consists of a supply trough 3 for supplying the articles to be metered, a stock hopper 4 arranged under the supply trough 3 for stocking and discharging a preset number of articles supplied from the supply trough 3, and a metering hopper 5 arranged under the stock hopper 4 for metering and discharging the articles supplied from the stock hopper 4. The plurality of channels 8 are arranged in straight lines and hoppers 4, 5 are arranged outward with the articles in the lined supply troughs 3 having rear ends 3a back to back in the supply direction. Thus, the width and size of the device is reduced, compared with those in the structure of the channels being in one straight line. The reduced width decreases the height of a collection chute 7 and prevents the breakage of the articles. The hoppers 4, 5 located outward improve workability. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combination weighing device that weighs objects to be weighed so as to have a predetermined amount, and combines and discharges the objects to be weighed such that the objects to be weighed are packed in a predetermined amount.
[0002]
[Prior art]
In general, a combination weighing device is configured to select a combination having a target weight range from a combination of objects to be weighed by a plurality of weighing units, and collectively discharge the selected objects to be weighed. .
Prior art document information related to the invention of this application includes the following.
[0003]
[Patent Document 1]
JP-A-10-59522 [Patent Document 2]
JP-A-11-37832
As shown in FIG. 5, the article supply device disclosed in Patent Literature 1 includes two tanks 101, 101 arranged side by side. Each tank 101 has a plurality of outlets 102. Above each outlet 102, a lifting block 103 is supported. Each elevating block 103 is driven up and down by a driving device (not shown) to regulate the outflow of the object to be weighed in the tank 101 from the outlet 102 at the lowered position, and to cause the to-be-weighed object to flow out from the outlet 102 at the raised position. .
[0005]
Above the left tank 101, a first supply conveyor 104 is arranged. The first supply conveyor 104 is supported so as to be able to slide horizontally. Above the first supply conveyor 104, a second supply conveyor 105, which is transported and driven in synchronization with the transportation of the supply conveyor 104, is fixedly arranged. The second supply conveyor 105 supplies the objects to be weighed received from the supply tank 106 to the first supply conveyor 104.
[0006]
Vibration-conveying feeders 107 are arranged below the respective outlets 102 of the tank 101, and the objects to be weighed carried out from the respective feeders 107 are stored in a pool hopper 108 arranged below the feeders. An object to be weighed discharged from each pool hopper 108 is supplied to a weighing hopper 109 disposed below the weighing object. The objects to be weighed supplied to the respective weighing hoppers 109 are respectively weighed by the weighing devices 110. The objects to be weighed discharged from each weighing hopper 109 are stored in the timing hopper 111.
[0007]
Below the timing hopper 111, two collecting conveyors 112 are arranged on the left and right. The left collecting conveyor 112 conveys the objects discharged from the four left timing hoppers 111 rightward, and the right collecting conveyor 112 transfers the objects discharged from the four right timing hoppers 111 leftward. , And put together by the collecting chute 113.
[0008]
Further, as shown in FIG. 6, the combination weighing device disclosed in Patent Document 2 has a large number of supply troughs 115, a pool hopper 116, and a weighing hopper 117 with a dispersion feeder (dispersion unit) 114 as a center. They are arranged on a substantially circumference. The supply trough 115, the pool hopper 116, and the weighing hopper 117 are arranged in this order from top to bottom, and the supply trough 115 is arranged on the outer peripheral side of the pool hopper 116 and the weighing hopper 117. The gate opening / closing tool 118 and the driving unit 119 are disposed at a position opposite to the dispersion feeder 114, that is, at a position outside the pool hopper 116 and the weighing hopper 117. The supply trough 115 supplies the objects to be weighed supplied from the dispersion feeder 114 in the direction of arrow a to the pool hopper 116 as shown by arrow b.
[0009]
[Problems to be solved by the invention]
However, in the article supply device disclosed in Patent Document 1, the so-called channels including the feeder 107, the pool hopper 108, the weighing hopper 109, and the timing hopper 111 are arranged in a large number (eight rows) in the horizontal direction, so that the cleaning operation is performed. Although it is excellent in performance, the machine width becomes large, and the whole device becomes large. Further, since the width of the machine becomes large, a transport device having a driving mechanism such as the first supply conveyor 104 and the second supply conveyor 105 and the collective conveyor 112 is required. Problem. Further, if the collecting conveyor 112 is eliminated and only the collecting chute 113 is used, the height of the collecting chute 113 increases according to the large machine width, and there is a problem that the weighing object discharged from the timing hopper 111 is damaged.
[0010]
The article supply device disclosed in Patent Document 2 includes a dispersion feeder 114, a pool hopper 116, and a weighing hopper 117, which form a channel, and the channels are arranged in a substantially circular shape. In this case, the gate opening / closing tool 118 and the driving unit 119 are disposed outside the pool hopper 116 and the weighing hopper 117. That is, since the hoppers 116 and 117 are arranged inside the apparatus, the size of the entire apparatus can be reduced. However, the hoppers 116 and 117 cannot be easily attached and detached, and the workability can be improved when cleaning the hoppers. There was a problem that was damaged.
[0011]
In order to solve the above problems, the present invention provides a combination weighing device that can reduce the size and cost of the device, prevent damage to the weighing object, and improve operability during cleaning and the like. It is intended to provide.
[0012]
[Means for Solving the Problems]
In order to achieve the above object, a combination weighing device according to claim 1 of the present invention comprises:
A supply trough 3 for supplying an object to be weighed; a stock hopper 4 disposed below the supply trough 3 for storing and discharging a predetermined amount of the object to be weighed supplied from the supply trough 3; And a weighing hopper 5 for measuring and discharging the object to be weighed supplied from the stock hopper 4,
The channels 8 are arranged in a plurality of linear rows, and the rear ends 3a of the supply troughs 3 in the row in the supply direction of the objects to be weighed are opposed to each other, and the hoppers 4, 5 are directed outward. It is characterized by being arranged.
[0013]
As a result, the channels 8 are arranged in a linear row, and they are arranged back to back in two rows, so that the machine width can be reduced as compared with the conventional structure in which the channels are formed in a single linear row. It is possible to reduce the size and cost of the device. In addition, since the machine width is reduced and the height of the collecting chute 7 can be reduced, the object to be weighed is hardly damaged. Further, since the respective hoppers 4 and 5 are disposed to face outward, attachment and detachment of the hoppers 4 and 5 become easy, and workability such as cleaning of the hoppers is improved.
[0014]
The combination weighing device according to claim 2 is the combination weighing device according to claim 1,
A tank 2 that is disposed above the back end 3a of the supply trough 3 that is back to back and that stores the object to be weighed;
The supply trough 3 supplies the object to be weighed from the bottom of the tank 2 by vibration.
[0015]
Thus, when the supply trough 3 vibrates, the object to be weighed in the tank 2 is directly conveyed from the tank 2 to the stock hopper 4 by the supply trough 3. That is, the dispersing device, which was conventionally required for transporting the objects to be weighed from the tank 2 to the supply trough 3, becomes unnecessary, and the size and cost of the device can be reduced.
[0016]
The combination weighing device according to claim 3 is the combination weighing device according to claim 2,
The supply trough 3 is provided with an overlap portion 17 in which one of the rear ends 3a of the supply troughs 3 is overlapped with the other.
[0017]
As a result, the objects to be weighed are prevented from falling from the gaps between the supply troughs 3 arranged with a predetermined gap therebetween due to vibration.
[0018]
The combination weighing device according to claim 4 is the combination weighing device according to claim 2 or 3,
The supply trough 3 is disposed in the tank 2 with the rear end 3a side facing upward.
[0019]
As a result, the rear end 3a of the supply trough 3 in the tank 2 breaks the so-called bridge in which the objects to be weighed are bridged between the opposed inner wall surfaces 2a of the tank 2.
[0020]
The combination weighing device according to claim 5 is the combination weighing device according to claim 2 or 3,
A protrusion 19 projecting into the tank 2 is provided upright on the overlap portion 17 of the supply trough 3.
[0021]
Thereby, the bridge of the object to be weighed in the tank 2 is broken by the projection 19 projecting into the tank 2.
[0022]
The combination weighing device according to claim 6 is the combination weighing device according to any one of claims 1 to 5,
A memory hopper 6 disposed below the weighing hopper 5 for storing and discharging the objects to be weighed supplied from the weighing hopper 5;
A collecting chute 7 disposed below the memory hopper 6 for collecting and discharging the objects to be weighed supplied from a plurality of the memory hoppers 6;
It is characterized by having.
[0023]
As a result, the number of weighing combinations increases, and the combination ability with respect to the target weight improves. Therefore, the machine width can be reduced as compared with a device having the same capacity.
Further, in the order of the stock hopper 4, the weighing hopper 5, and the memory hopper 6, the interval in the back-to-back direction can be gradually reduced so that the stock hopper becomes narrower toward the collecting chute 7. In other words, the collecting chute 7 is reduced in size and height is reduced, and the falling height when the object to be weighed is discharged can be suppressed, so that the object to be weighed is hardly damaged.
[0024]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
1 is a side view of the combination weighing device according to the present invention, FIG. 2 is a plan view of the combination weighing device shown in FIG. 1, FIG. 3 is a view taken along the line AA in FIG. 2, and FIG. It is a side view.
[0025]
The combination weighing device 1 according to the present embodiment includes a tank 2, a supply trough 3 provided below the tank 2, a stock hopper 4 provided below the supply trough 3, and a stock hopper 4 provided below the stock hopper 4. The measuring hopper 5, a memory hopper 6 disposed below the weighing hopper 5, and a collecting chute 7 disposed below the memory hopper 6 are provided as main components. Among them, the supply trough 3, the stock hopper 4, the weighing hopper 5, and the memory hopper 6 constitute a so-called channel 8 arranged in the vertical direction.
[0026]
The tank 2 has a rectangular cylindrical shape that communicates the substantially rectangular opening in the vertical direction. The lower opening of the tank 2 is located on the rear end 3a of each supply trough 3 described later. An object to be weighed is put into the tank 2 from an upper opening, and the tank 2 stores the object to be weighed.
[0027]
The supply trough 3 sends an object to be weighed (not shown) downstream (left and right sides in FIG. 1) by vibrating, and the rear end 3a on the upstream side is arranged back to back. As shown in FIG. 2, the supply trough 3 has a plurality of pairs (five pairs in the illustrated example) with the downstream end 3b facing outward, and is arranged in parallel in the vertical direction in the figure. ing. That is, five supply troughs are arranged in a straight line, and a total of ten supply troughs are arranged back to back. The number of the supply troughs 3 arranged in parallel is not limited to this.
[0028]
As shown in FIG. 4, the supply trough 3 includes a trough base 11 installed on a base 10 via a coil spring 9, a pair of leaf springs 12 attached to the trough base 11, A connecting member 13 for connecting the upper ends of the troughs 12, a trough body 14 supported on the connecting member 13, a coil 15 attached to the trough base 11, and a balancer 16 attached to the trough base 11. . According to the supply trough 3, when the coil 15 is energized, a magnetic force is generated, the coupling member 13 is attracted, and the trough body 14 is displaced inward (arrow d) while sinking downward, and then the trough body 14 is moved upward. The trough body 14 is displaced outward (arrow c) while floating, and the trough body 14 repeatedly vibrates in the cd direction shown in the figure. The object to be weighed on the trough body 14 is conveyed to the stock hopper 4 by this vibration.
[0029]
The supply trough 3 has a rear end 3 a inserted into the tank 2 from the bottom of the tank 2. Therefore, when the supply trough 3 vibrates, the objects to be weighed in the tank are directly conveyed from the tank to the stock hopper 4 by the supply trough 3. This eliminates the need for a dispersing device conventionally required for transporting an object to be weighed from the tank 2 to the supply trough 3, thereby making it possible to reduce the size and cost of the device.
[0030]
The supply trough 3 forms an overlap portion 17 in which one of the rear end portions 3a which are inserted into the tank 2 and are back to back is overlapped with the other. A gap is formed in a pair of adjacent supply troughs 3 so that the vibrating supply troughs 3 do not interfere with each other. The trough 3 is closed by forming an overlapped portion 18 on the side thereof. Since each supply trough 3 vibrates, it is necessary to arrange the supply trough 3 with a predetermined gap. The object to be weighed may fall from this gap, but in this combination weighing device 1, the gap is covered by the overlap portions 17 and 18, so that the object to be weighed can be weighed from the gap between the supply troughs inserted into the tank 2. Things will not fall.
[0031]
The supply trough 3 has the rear end 3a side inclined upward in the tank 2. Therefore, the rear end 3a of the supply trough 3 is inclined upward, so that the rear end 3a of the supply trough 3 vibrating in the tank 2 extends obliquely upward. A so-called bridge in which the object to be weighed is bridged between the opposed inner wall surfaces 2a, 2a is less likely to occur.
[0032]
Further, a projection 19 projecting into the tank 2 is provided upright on the overlap portion 17 at the rear end 3a of the supply trough 3. By providing the projections 19 on the supply trough 3, the above-mentioned bridge of the object to be weighed in the tank 2 is more unlikely to occur.
[0033]
The stock hoppers 4 are disposed below the front end portions 3b of the respective supply troughs 3 in a back-to-back relationship. The stock hopper 4 has an opening 4a in the upper part and a discharge port 4b in the lower part, so that the object to be weighed supplied from the supply trough 3 can be discharged from the discharge port 4b. The outlet 4b is opened and closed by a shutter 4c. The shutter 4c is driven to open and close by a drive unit (not shown).
[0034]
The weighing hoppers 5 are disposed below the outlets 4b of the respective stock hoppers 4 in a back-to-back relationship. The weighing hopper 5 has an opening 5a in the upper part and a discharge port 5b in the lower part, so that the object to be weighed supplied from the stock hopper 4 can be discharged from the discharge port 5b. The discharge port 5b is opened and closed by a shutter 5c. The shutter 5c is driven to open and close by a drive unit (not shown). The objects to be weighed supplied to the respective weighing hoppers 5 are respectively weighed by weighing devices (not shown).
[0035]
The memory hoppers 6 are disposed below the discharge ports 5b of the respective weighing hoppers 5 in a back-to-back relationship. The memory hopper 6 has an opening 6a in the upper part and a discharge port 6b in the lower part, so that the object to be weighed supplied from the weighing hopper 5 can be discharged from the discharge port 6b. The outlet 6b is opened and closed by a shutter 6c. The shutter 6c is driven to open and close by a drive unit (not shown). The objects to be weighed discharged from the memory hopper 6 are collected by the collecting chute 7.
[0036]
In the combination weighing device 1 described above, the objects to be weighed contained in the tank are supplied to each stock hopper 4 by each supply trough 3. Each stock hopper 4 stores a predetermined amount of the object to be weighed, and discharges the object to be weighed to the lower weighing hopper 5 by opening the shutter 4c. Each supply trough 3 supplies a new object to be weighed to the stock hopper 4 when there is no more object to be weighed in the stock hopper 4 therebelow. Each of the weighing hoppers 5 stores the objects to be weighed from each of the stock hoppers 4, and weighs the objects to be weighed with a weighing device. Next, after weighing, each stock hopper 4 discharges the object to be measured to the lower memory hopper 6 by opening the shutter 5c.
[0037]
The weighing signal of each weighing device is input to a combination selecting means (not shown). The combination selecting means stores the weight of the object to be weighed supplied to each weighing hopper 5 based on the weighing signal of each weighing device. For example, when receiving a discharge request signal from a packaging line or the like, a combination within the target weight range is selected from the combinations of the weight values of the objects weighed by the respective weighing hoppers 5, and the selected weighing target is selected. A selection signal corresponding to the weighing hopper 5 and / or the memory hopper 6 containing the object is output to open the shutter 5c and / or the shutter 6c. Thereby, the objects to be weighed combined in a weight within the target weight range are collected by the collecting chute 7 and discharged to the packaging line.
[0038]
There are a plurality of methods for selecting an object to be weighed by the combination selecting means. In this method, a combination is selected from the objects to be weighed stored in the weighing hopper 5, and only the selected objects to be weighed are once stored in the memory hopper 6 and then discharged to the collecting chute 7. Also, a method of storing the objects to be weighed by the weighing hopper 5 in the memory hopper 6 and selecting a combination from the objects to be weighed stored in the memory hopper 6. Then, there is a method of selecting a combination from the object to be weighed in the weighing hopper 5 and the object to be weighed in the memory hopper 6. In the present combination weighing device 1, any of these methods may be employed.
[0039]
According to the combination weighing device 1 configured as described above, the plurality of channels 8 including the supply trough 3, the stock hopper 4, and the weighing hopper 5 are arranged in a linear row, and these are back-to-back in two rows. Therefore, the width of the machine can be reduced, and the size and cost of the device can be reduced, as compared with the conventional structure in which the channels are arranged in a straight line. In addition, since the machine width is reduced and the height of the collecting chute 7 can be reduced, the object to be weighed is hardly damaged. Further, since the respective hoppers 4 and 5 are disposed to face outward, attachment and detachment of the hoppers 4 and 5 become easy, and workability such as cleaning of the hoppers is improved.
[0040]
In each channel 8, the memory hopper 6 is disposed below the open / close gate 5c of each weighing hopper 5, so that the number of weighing combinations increases and the number of combinations increases. Therefore, the combination ability with respect to the target weight is improved. This allows a reduction in machine width as compared to a combination weighing device of the same capacity.
[0041]
Further, by disposing the memory hopper 6, the interval in the back-to-back direction of the stock hopper 4, the weighing hopper 5, and the memory hopper 6 is gradually reduced in this order, and the space is narrowed toward the collecting chute 7. It becomes possible to make it round. As a result, it is possible to reduce the height of the collecting chute 7 by reducing its size. Therefore, the falling height when the object to be weighed is discharged is reduced, and the object to be weighed can be hardly damaged.
[0042]
【The invention's effect】
As described above, according to the combination weighing device of the present invention, the channels including the supply trough, the stock hopper, and the weighing hopper are arranged in a plurality of linear rows, and two rows are arranged back to back. The width of the machine can be reduced as compared with the structure of the device, and the size of the device can be reduced. Further, since the machine width is small, the height of the collecting chute is reduced, and damage to the objects to be weighed discharged to the collecting chute can be prevented. Furthermore, since the hoppers are arranged outward, the hoppers can be easily attached and detached, and the workability at the time of cleaning the hoppers can be improved.
[0043]
In addition, a tank for storing an object to be weighed is provided above the back end of the supply trough, and the supply trough vibrates to supply the object to be weighed from the bottom of the tank. The object to be weighed is supplied from the tank directly to the stock hopper by the vibration of the supply trough. This eliminates the need for a dispersing device that has conventionally been necessary for transporting the objects to be weighed from the tank to the supply trough, so that the size and cost of the device can be reduced.
[0044]
Also, if one of the rear ends of the supply troughs that are back-to-back is provided with an overlap portion that overlaps the other, the gaps between the supply troughs that are arranged with a predetermined gap therebetween due to vibration are provided. Can be prevented from falling. That is, when the object to be weighed is a food, it is hygienic.
[0045]
In addition, if the rear end of the supply trough is arranged in the tank with the rear end facing upward, the object to be weighed is cross-linked in the tank at the rear end of the supply trough across opposing inner wall surfaces of the tank. Since the so-called bridge is broken, the transportability of the object to be weighed by the supply trough can be improved.
[0046]
Further, a protrusion protruding into the tank may be provided upright in the overlap portion of the supply trough, thereby breaking a bridge of the object to be weighed in the tank and improving the transportability of the object to be weighed by the supply trough. it can.
[0047]
In addition, the memory hopper is provided below the weighing hopper, and the collecting chute is provided below the memory hopper, so that the number of weighing combinations is increased, and the combination capacity for the target weight is improved. Therefore, the width of the machine can be reduced as compared with a device having the same capacity.
In addition, in the order of the stock hopper, the weighing hopper, and the memory hopper, the interval in the back-to-back direction can be gradually reduced so that the hopper narrows toward the collecting chute. That is, since the height of the collecting chute can be reduced by reducing the size of the collecting chute and the drop height when the object to be weighed is discharged can be suppressed, damage to the object to be weighed can be prevented.
[Brief description of the drawings]
FIG. 1 is a side view of a combination weighing device according to the present invention.
FIG. 2 is a plan view of the combination weighing device shown in FIG.
FIG. 3 is a view taken along the line AA in FIG. 2;
FIG. 4 is an enlarged side view near a supply trough.
FIG. 5 is a configuration diagram of a conventional article supply device.
FIG. 6 is a schematic longitudinal sectional view of another conventional combination weighing device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Combination weighing device, 2 ... Tank, 3 ... Supply trough, 3a ... Rear end part, 4 ... Stock hopper, 5 ... Weighing hopper, 6 ... Memory hopper, 7 ... Collecting chute, 8 ... Channel, 17 ... Overlap part , 19 ... projections.

Claims (6)

A supply trough (3) for supplying an object to be weighed, a stock hopper (4) disposed below the supply trough for storing and discharging a predetermined amount of the object to be weighed supplied from the supply trough, A channel (8) comprising a weighing hopper (5) disposed below and weighing and discharging the object to be weighed supplied from the stock hopper;
The channels are arranged in a plurality of linear rows, and the rear ends (3a) of the supply troughs in the row in the supply direction of the objects to be weighed are opposed to each other, and the respective hoppers are arranged outward. A combination weighing device, characterized in that: A tank (2) disposed above the back-to-back rear end (3a) of the supply trough (3) and containing the object to be weighed;
The combination weighing device according to claim 1, wherein the supply trough supplies the object to be weighed from the bottom of the tank by vibration. Combination weighing according to claim 2, characterized in that it comprises an overlap (17) in which one of the rear ends (3a) of the supply troughs (3) that are back-to-back overlap one another. apparatus. The combination weighing device according to claim 2 or 3, wherein the supply trough (3) is disposed in the tank (2) with a rear end (3a) side thereof facing upward. The combination weighing device according to claim 2 or 3, wherein a projection (19) projecting into the tank (2) is provided upright at an overlap portion (17) of the supply trough (3). A memory hopper (6) disposed below the weighing hopper (5) for storing and discharging the object to be weighed supplied from the weighing hopper;
A collecting chute (7) disposed below the memory hopper for collecting and discharging the objects to be weighed supplied from a plurality of the memory hoppers;
The combination weighing device according to any one of claims 1 to 5, further comprising:

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