JP3635274B2 - Distributed supply device and combination weighing device using the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a distributed supply device that supplies an object to be weighed uniformly to, for example, a plurality of weighing units of a combination weighing device, and a combination weighing device using the same.
[0002]
[Prior art]
In general, the combination weighing device measures the objects to be weighed supplied from the article supply device by a plurality of weighing units, selects a combination within the target weight range from the combinations of the objects to be weighed, The selected objects are collected and discharged.
Prior art document information relating to the invention of this application includes the following.
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 10-59522
[Patent Document 2]
JP 10-59524 A
[0004]
FIG. 8 is a schematic configuration diagram of an article supply apparatus disclosed in Patent Document 1 as an example of an article supply apparatus of this type of combination weighing apparatus. The article supply apparatus shown in FIG. 8 is provided with two tanks 101 and 101 arranged side by side. Each of the tanks 101, 101 has a rectangular opening at the top, and a plurality of discharge ports 102 are arranged in a line in the longitudinal direction of the tank 101 so as to sandwich the mountain-shaped guide portion 101 a at the bottom. Above each discharge port 102, a semi-cylindrical lifting block 103 is supported. Each lifting block 103 is driven up and down by a driving device (not shown), and regulates the outflow of the object to be weighed in the tank 101 from the discharge port 102 at the lowered position, and the object to be weighed out from the discharge port 102 at the raised position. Let
[0005]
A first supply conveyor 104 is arranged above the left tank 101. The first supply conveyor 104 is configured by a conveyor that can be switched between forward rotation and reverse rotation. The first supply conveyor 104 is reciprocally movable above the tank 101 horizontally along the direction in which the discharge ports 102 of the tank 101 are arranged while being supported by a guide member (not shown). Sensors 105 for optically detecting the height of the objects to be weighed below are respectively attached to the lower surfaces of the frames (not shown) of both ends 104a and 104b of the first supply conveyor 104. The left end sensor 105 detects the height of an object to be weighed in the left tank 101. The right end sensor 105 detects the height of the object to be weighed in the right tank 101.
[0006]
Above the first supply conveyor 104, a second supply conveyor 106 that is transported and driven in synchronization with the transport of the supply conveyor 104 is fixedly disposed. The second supply conveyor 106 supplies the objects to be weighed received from the supply tank 107 to the first supply conveyor 104. The supply of the object to be weighed to the replenishing tank 107 is performed by a bucket conveyor (not shown).
[0007]
Vibrating and transporting feeders 108 are respectively disposed below the discharge ports 102 of the tank 101, and the objects to be weighed out from the feeders 108 are accommodated in a pool hopper 109 disposed below the feeders 108. The objects to be weighed discharged from the respective pool hoppers 109 are supplied to the weighing hoppers 110 arranged therebelow.
[0008]
The objects to be weighed supplied to each weighing hopper 110 are respectively weighed by the weigher. The objects to be weighed discharged from each weighing hopper 110 are accommodated in the timing hopper 111.
[0009]
The pool hopper 109, the weighing hopper 110, and the timing hopper 111 are formed in a rectangular tube shape that is open at the top and bottom so that the sticky object to be weighed does not adhere to the bottom, and the bottom surface of each of the bottom hopper 109a, Opened and closed by 110a and 111a.
[0010]
Below the timing hopper 111, two collective conveyors 112 are arranged on the left and right. The left collective conveyor 112 conveys the objects to be weighed discharged from the left four timing hoppers 111 to the right, and the right collective conveyor 112 conveys the objects to be weighed from the four right timing hoppers 111 to the left. And are gathered together by a collecting chute 113 disposed between the two collecting conveyors 112 and 112.
[0011]
By the way, in the said article supply apparatus, while the combination discharge operation is repeated, the amount of the objects to be weighed in both tanks 101 and 101 decreases. However, the objects to be weighed by the weighing hoppers 110 are selected at different frequencies. For this reason, the amount of the objects to be weighed discharged from each discharge port 102 of the tank 101 per unit time is not necessarily uniform.
[0012]
Therefore, in the article supply apparatus, in order to solve the above problem, the first supply conveyor 104 is moved to detect the position where the height of the object to be weighed is not more than a predetermined value based on the signal of the sensor 105, and the object to be weighed at that position. We are replenishing things. More specifically, for example, as shown in FIG. 9A, when the height of the object to be weighed near the upper end of the discharge port 102 at the right end of the left tank 101 becomes equal to or lower than a predetermined level, this is changed to the first supply conveyor. The sensor 105 on the left side of 104 detects. Upon receipt of the signal from the sensor 105, it is confirmed that the second elevating block 103 from the right end and the right end of the left tank 101 is not operated, and the first supply conveyor 104 is moved to the first supply conveyor 104 as shown in FIG. Stopping at the position, the first and second supply conveyors 104 and 106 are transported and driven, and the objects to be weighed are intensively dropped to the right side in the left tank 101 for supply. When the object to be weighed below the left sensor 105 becomes higher than a predetermined height, the conveyance of the second replenishment conveyor 106 is stopped, and all objects to be weighed on the first replenishment conveyor 104 are stored in the tank 101. Then, the conveyance of the first supply conveyor 104 is stopped, and the sliding movement of the first supply conveyor 104 is resumed.
[0013]
[Problems to be solved by the invention]
In the conventional article supply apparatus described above, a supply tank 107 and two types of supply conveyors 104 and 106 are provided between a transport apparatus such as a bucket conveyor and the two tanks 101 in order to eliminate unevenness of the objects to be weighed in the tank 101. Indispensable. For this reason, since the replenishment apparatus which consists of a large-scale machine component is arrange | positioned at the upper part of the tank 101, there existed a problem that the whole apparatus enlarged. The two types of supply conveyors 104 and 106 must be controlled while being synchronized, and after the stop position of the first supply conveyor 104 is determined, both the supply conveyors 104 and 106 are operated. In addition, the objects to be weighed are not directly carried into the tank 101 from a transfer device such as a bucket conveyor, but are carried via the supply tank 107 and the two types of supply conveyors 104 and 106. For this reason, there is a problem that it takes time to finish each weighing and the combination discharge operation cannot be performed smoothly.
[0014]
Moreover, the article supply apparatus disclosed by the said patent document 2 is known as a solution for eliminating the bias | inclination of the to-be-measured object in the tank 101 mentioned above. In this article supply apparatus, as shown in FIGS. 10A and 10B, the height of articles in the tank 101 is higher than the tank 101 in which a plurality of discharge ports 102 are arranged in a predetermined direction at the bottom. A plurality of sensors 120 for detecting the height are provided along the direction in which the discharge ports 102 of the tank 101 are arranged. Then, the supply conveyor 121 is arranged in a state where the discharge port 102 is viewed from above and the conveyance direction is directed to the arrangement direction of the discharge ports 102, and the height of the objects to be weighed in the tank 101 becomes uniform by the output of the sensor 120. Thus, the conveyance speed of the supply conveyor 121 is controlled.
[0015]
However, in the article supply apparatus, when the conveyance speed of the supply conveyor 121 is controlled, the drop position of the object to be weighed replenished in the tank 101 varies depending on the weight of the object to be weighed on the supply conveyor 121. For this reason, the conveyance speed of the supply conveyor 121 has to be controlled in accordance with the weight of the object to be weighed so as to drop the object to be weighed at the target drop position.
[0016]
By the way, although the conventional article supply apparatus mentioned above is the structure provided with the reinforcement tank and the conveyor, in recent years, size reduction of the whole apparatus is desired for the purpose of space saving and simplification of a structure. For this reason, in the combination weighing device described above, a configuration in which an object to be weighed is directly carried into two tanks from a conveying device such as a bucket conveyor is desired.
[0017]
However, in the above-described combination weighing device, when the objects to be weighed are directly carried into the tank, the objects to be weighed in the tank cannot be made uniform. That is, when the objects to be weighed are directly brought into the central part of the tank from the transfer device such as a bucket conveyor so that the objects to be weighed do not fall out of the tanks in the two tanks of the combination weighing device described above, The objects to be weighed are concentrated and piled up only on the layer, increasing the layer thickness. And the layer thickness of the object to be weighed decreases toward the both ends in the tank. At that time, even if the object to be weighed is a dry product such as snack candy or rice cake, even if the piled portion collapses and spreads to the periphery, it does not reach both ends of the tank. For this reason, the layer thickness of the object to be weighed in the entire tank is not uniform, the supply of the object to be weighed to the supply trough from both ends of the tank is reduced, and efficient combination weighing cannot be realized. Cause problems.
[0018]
Therefore, even when an object to be weighed is transferred directly from the transfer device to the center of the tank, the difference in the layer thickness of the object to be weighed between the center and both ends of the tank is reduced, and the layer thickness of the object to be weighed in the entire tank Therefore, there has been a demand for a configuration that can make the ratio substantially uniform.
[0019]
Therefore, the present invention has been made in view of the above problems, and when the object to be weighed is supplied directly from the transfer device such as a bucket conveyor to the center of the tank, the layer thickness of the object to be weighed over the entire tank. It is an object of the present invention to provide a distributed supply device that can make the temperature substantially uniform and a combination weighing device using the same.
[0020]
[Means for Solving the Problems]
  In order to achieve the above object, the dispersion supply apparatus according to the first aspect of the present invention has a cylindrical shape having openings 32 and 33 on the upper surface and the bottom surface, respectively, and the object W to be weighed from the center of the opening 32 on the upper surface. A plurality of supply troughs 3 arranged in a horizontal row below the opening 33 on the bottom surface, and a tank 2 for supplying the objects to be weighed to each of the plurality of supply troughs;
  It is rotatably provided above the center of the tank so as to form an inclined surface 35b, and the object to be weighed is distributed and distributed by the inclined surface to a position where the layer thickness of the object to be weighed is small. A flat distribution member 35B;
  Detection means 36 for detecting the layer thickness of the objects to be weighed W at least at two positions on both ends in the tank 2;
  When it is determined that the detection value of the detection means is smaller than a preset reference value, the distribution member is rotated so that the object to be measured is replenished to a position in the tank indicating the detection value. Control means 37 for controllingIt is characterized by comprising.
[0021]
  Invention of Claim 2Combination weighing deviceIsA combination weighing device 1 that measures the object to be weighed W by a plurality of weighing units, selects a combination having a target weight range from the combinations of the objects to be weighed, and collects and discharges the selected objects to be weighed. In
  A cylindrical shape having openings 32 and 33 on the upper surface and the bottom surface, respectively, the object to be weighed is supplied from the central portion of the opening 32 on the upper surface, and a plurality of supply troughs 3 are arranged below the opening 33 on the bottom surface. A tank 2 arranged in a line and supplying the objects to be weighed to each of the plurality of supply troughs;
  An inclined surface 35b is formed so as to be rotatable at a position above the central portion of the tank, and the object to be weighed is dispersed by the inclined surface with respect to a position where the layer thickness of the object W is small. A dispersion supply device 31 having a flat plate-like distribution member 35B for distribution;
  A plurality of weighing hoppers 5 arranged corresponding to the plurality of supply troughs 3;
  A plurality of weighing devices 25 provided for each of the plurality of weighing hoppers 5 for weighing the objects to be weighed;
  When it is determined that the measurement value is smaller than a preset reference value by inputting a measurement value from a measuring instrument that weighs objects to be stored in weighing hoppers corresponding to at least two positions on both ends of the tank. And a control means 38 for controlling the rotation of the distributing member so that the object to be weighed W is replenished to a position in the tank indicating the measured value.It is provided with.
[0026]
In the distributed supply device of the present invention and the combination weighing device using the same, when the object to be weighed is supplied from the central part of the tank, the object to be weighed is distributed and distributed by the distributing member and replenished to a position where the layer thickness is small. Is done. Thereby, the layer thickness of the to-be-measured object in a tank becomes substantially uniform, without being piled up only in the tank center part.
[0027]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a side view showing the overall configuration of a combination weighing device employing a distributed supply device according to the present invention, FIG. 2 is a plan view of the combination weighing device, FIG. 3 is a front view of the combination weighing device, and FIG. FIG. 5 is a schematic configuration diagram showing a second embodiment of the distributed supply apparatus according to the present invention, and FIG. 6 is a third embodiment of the distributed supply apparatus according to the present invention. FIG. 7 is a schematic configuration diagram showing a fourth embodiment of a distributed supply apparatus according to the present invention.
[0028]
The distributed supply device of the present invention is used, for example, when distributing the objects to be weighed uniformly to a plurality of weighing units of the combination weighing device and distributing the objects to be measured in the arrangement direction of the plurality of supply troughs. The structure provided with the members is the basic structure.
[0029]
First, an overall configuration of a combination weighing device in which the distributed supply device of this example is employed will be described with reference to FIGS. 1 to 3.
[0030]
As shown in FIGS. 1 to 3, the combination weighing device 1 includes a tank 2, a supply trough 3 disposed below the tank 2, a stock hopper 4 disposed below the supply trough 3, and a stock hopper 4. The weighing hopper 5 disposed below the weighing hopper 5, the memory hopper 6 disposed below the weighing hopper 5, and the collective chute 7 disposed below the memory hopper 6 are provided as main components. . Among these, 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.
[0031]
A tank 2 that forms the base of a dispersion supply device 31 to be described later has a quadrangular cylindrical shape that communicates substantially rectangular openings 32 and 33 in the vertical direction. The lower opening 33 of the tank 2 is located on the rear end 3a of each supply trough 3 described later. The tank 2 is loaded with an object to be weighed from the upper opening 32 and stores the object to be weighed.
[0032]
The supply trough 3 vibrates to send an object to be weighed (not shown) downstream (left and right sides in FIG. 1), and arranges the upstream rear end portion 3a back to back. As shown in FIG. 2, a pair of supply troughs 3 with the downstream end portion 3b facing outward are arranged in parallel in the vertical direction of the figure in a plurality of pairs (five pairs in the illustrated example). ing. That is, five supply troughs 3 arranged in a straight line are arranged back to back, and a total of ten supply troughs 3 are arranged. The number of supply troughs 3 arranged in parallel is not limited to this.
[0033]
The supply trough 3 has a rear end 3 a inserted from the bottom of the tank 2 into the tank. 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 that has been conventionally required to transport the objects to be weighed from the tank 2 to the supply trough 3, thereby enabling downsizing and cost reduction of the device.
[0034]
The supply trough 3 forms an overlap portion 17 in which one of the rear end portions 3a inserted into the tank 2 and back to back is overlapped with the other. In addition, a pair of adjacent supply troughs 3 is formed with a gap for preventing the vibrating supply troughs 3 from interfering with each other, and this gap also serves as a side of one supply trough 3 for the other supply trough. It is closed by forming an overlap portion 18 that overlaps the side portion of the trough 3. Since the supply troughs 3 vibrate, it is necessary to dispose them with a predetermined gap. Although the object to be weighed may fall from this gap, in this combination weighing device 1, the gap is covered by the overlap portions 17 and 18, so that the object to be weighed is from the gap between the supply troughs inserted in the tank 2. Things will not fall.
[0035]
The supply trough 3 is inclined in the tank 2 with the rear end 3 a side facing upward. Therefore, the rear end portion 3a of the supply trough 3 is inclined upward, so that the rear end portion 3a of the supply trough 3 that vibrates in the tank 2 extends obliquely upward. So-called bridges in which the objects to be weighed are bridged across the opposing inner wall surfaces 2a, 2a are less likely to occur.
[0036]
Further, a protrusion 19 protruding into the tank 2 is provided upright at the overlap portion 17 at the rear end portion 3 a of the supply trough 3. By providing the projections 19 on the supply trough 3, the above-described bridge of the objects to be weighed in the tank 2 is less likely to occur.
[0037]
The stock hoppers 4 are arranged below each other and below the front end portions 3 b of the supply troughs 3. The stock hopper 4 has an opening 4a in the upper part and a discharge port 4b in the lower part, so that the objects to be weighed supplied from the supply trough 3 can be discharged from the discharge port 4b. The discharge port 4b is opened and closed by the shutter 4c. The shutter 4c is driven to open and close by a drive unit (not shown).
[0038]
The weighing hoppers 5 are back-to-back and are disposed below the discharge ports 4b of the respective stock hoppers 4. The weighing hopper 5 has an opening 5a in the upper part and a discharge port 5b in the lower part, so that the objects 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). Further, the objects to be weighed supplied to each weighing hopper 5 are weighed by the weighing devices 25 provided for each weighing hopper 5.
[0039]
The memory hoppers 6 are arranged back to back below the discharge ports 5b of the respective weighing hoppers 5. The memory hopper 6 has an opening 6a in the upper part and an outlet 6b in the lower part, so that an object to be weighed supplied from the weighing hopper 5 can be discharged from the outlet 6b. The discharge port 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 together by the collective chute 7.
[0040]
In the combination weighing device 1 described above, an object to be weighed stored in a tank is supplied to each stock hopper 4 by each supply trough 3. Each stock hopper 4 stores a predetermined amount of objects to be weighed, and discharges the objects 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 the object to be weighed below the stock hopper 4 is exhausted. Each weighing hopper 5 stores the objects to be weighed from the respective stock hoppers 4 and weighs the objects to be weighed by the weighing devices 25. Next, after weighing, each stock hopper 4 discharges the object to be weighed to the lower memory hopper 6 by opening the shutter 5c.
[0041]
The measurement signal of each measuring instrument 25 is input to a combination selection unit (not shown). The combination selection means stores the weight of the object to be weighed supplied to each weighing hopper 5 based on the weighing signal of each weighing instrument 25. For example, when a discharge request signal is received from a packaging line or the like, a combination within the target weight range is selected from combinations of the weight values of the objects to be weighed measured by the respective weighing hoppers 5, and the objects to be weighed selected by the combination are 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 with the weight within the target weight range are collected by the collecting chute 7 and discharged to the packaging line.
[0042]
There are a plurality of methods for selecting the objects to be weighed by the combination selection means. For this, 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. In addition, a method in which an object to be weighed by the weighing hopper 5 is accommodated in the memory hopper 6 and a combination is selected from the objects to be weighed accommodated in the memory hopper 6. There is a method of selecting a combination from the objects to be weighed in the weighing hopper 5 and the objects to be weighed in the memory hopper 6. In the combination weighing device 1, any of the methods may be employed.
[0043]
Next, each embodiment of the distributed supply apparatus according to the present invention will be described with reference to the drawings. In addition, the distributed supply apparatus 31 (31A-31D) of each embodiment demonstrated below is utilized when dry products, such as snack confectionery and a candy, are supplied to the several supply trough 3 as the to-be-measured item W, for example. It is.
[0044]
First, the distributed supply device 31A of the first embodiment will be described with reference to FIG. The distributed supply device 31A of the first embodiment has a tank 2 to which an article W as an object to be weighed is supplied. The tank 2 is formed in a rectangular tube shape having rectangular openings 32 and 33 on the top and bottom surfaces, respectively. Below the tank 2, a plurality of supply troughs 3 are arranged in a straight line in a horizontal line with a gap of a predetermined height from the opening 33 on the bottom surface. Each of the supply troughs 3 faces one end side of the opening 33 on the bottom surface of the tank 2. In the example of FIG. 4, an example in which five supply troughs 3 are arranged in the lower part of the tank 2 is shown. However, when the combination weighing apparatus shown in FIG. Also on the side, five supply troughs 3 are arranged facing each other. An article W as an object to be weighed is supplied from the central portion to the tank 2 by a predetermined amount by a transfer device 34 such as a supply bucket or a bucket conveyor.
[0045]
At a position above the central portion of the tank 2, a distribution member 35 (35 </ b> A) for distributing the articles W supplied from the central portion of the tank 2 is provided in parallel with the supply trough 3. The distribution member 35A is formed of a long plate material bent into an inverted V shape. This distribution member 35A is fixed to inner wall surfaces 2a, 2a whose opposite ends in the longitudinal direction are opposed to the front-rear direction (depth direction of the tank 2) of the paper surface of FIG. The inclination angle θ of the sorting member 35 </ b> A is preferably an angle at which the product W is distributed and distributed to positions reaching both end portions of the tank 2 when the article W is supplied from the central portion of the tank 2.
[0046]
In the distributed supply device 31A configured as described above, when the product W is supplied from the transport device 34 such as a supply bucket to the central portion of the tank 2, the product W is folded by the sorting member 35A as indicated by an arrow A in FIG. With the curved portion 35a as a boundary, both inclined surfaces 35b are distributed and distributed toward both end portions in the tank 2 (on the left and right sides in FIG. 4 and in the arrangement direction of the supply troughs 3). As a result, the articles W are distributed and distributed on both sides without being concentrated in the central portion of the tank 2 and the thickness of the articles W in the tank 2 can be made substantially uniform. At this time, if the product W is a dry product, the product W is distributed to both sides in the tank 2 with the sorting member 35A as a boundary without the product W adhering to the sorting member 35A. Moreover, even if the products W distributed to both sides in the tank 2 by the sorting member 35A are piled up, the products W are naturally collapsed and are dispersed moderately at both ends and the center of the tank 2.
[0047]
Next, the distributed supply device 35B of the second embodiment will be described with reference to FIG. In addition, the same number is attached | subjected to the component same as 1st Embodiment, and only a different structure is demonstrated.
[0048]
In the distributed supply device 35B according to the second embodiment, the distribution member 35B provided at the upper position of the central portion of the tank 2 is configured in a flat plate shape as shown in FIG. The distribution member 35B is pivotally supported so that the center of both ends can rotate with respect to the inner wall surfaces 2a, 2a facing the tank 2, and the longitudinal direction of the supply trough 3 (the direction orthogonal to the arrangement direction of the supply trough 3). ) In parallel.
[0049]
In the distributed supply device 35B configured as described above, when the product W is supplied from the transport device 34 such as a supply bucket to the central portion of the tank 2, the product W is replenished to a position where the layer thickness of the product W in the tank 2 is small. Thus, the sorting member 35B is rotated. As a result, as shown by the arrow B in FIG. 5, the product W is replenished to the portion where the layer thickness of the product W in the tank 2 is small by the inclined surface 35 b of the sorting member 35 </ b> B, and the layer thickness of the product W in the tank 2. Is made uniform.
[0050]
Next, a distributed supply device 31C according to the third embodiment will be described with reference to FIG. In addition, the same number is attached | subjected to the component same as 1st and 2nd embodiment, and the description is abbreviate | omitted. In addition, the distributed supply devices 31C and 31D of the third and fourth embodiments described below are examples in the case where the tilting angle is changed by controlling the rotation of the rotating distribution member 35B.
[0051]
As shown in FIG. 6, in addition to the configuration of the second embodiment, the distributed supply device 31C of the third embodiment includes a detection unit 36 that detects the layer thickness of the product W and a distribution member 35B at predetermined angles. A driving means 40 that moves, and a control means 37 that outputs a command to the driving means 40 to rotate the sorting member 35B by a predetermined angle based on the detection result of the detection means 36 are provided.
[0052]
Specifically, the detecting means 36 is constituted by, for example, a reflection type light projecting / receiving sensor. This reflection type detection means 36 is provided at two upper portions on both ends of the tank 2 so that the detection surface faces the bottom surface of the tank 2, and the layer thicknesses of the articles W at the two ends in the tank 2 are optically determined. Is detected. That is, the detection means 36 irradiates light toward the bottom surfaces on both end sides in the tank 2, receives reflected light due to the irradiation of this light, and controls the control means 37 using an electric signal proportional to the amount of received light as a detection signal. Is output.
[0053]
As the detecting means 36, a transmission type light projecting / receiving sensor can be used. In this case, a light projecting sensor and a light receiving sensor are provided so as to face two side surfaces (the front surface and the rear surface in FIG. 6 on which the sorting member 35B is attached) on both ends of the tank 2. The transmissive detection means 36 irradiates light into the tank 2 and outputs an electrical signal proportional to the amount of light received as a result of this light irradiation to the control means 37 as a detection signal.
[0054]
When the control means 37 receives the detection signal from the detection means 36 and determines that the value of the detection signal is smaller than a preset reference value, the direction in the tank 2 indicating the detection value by the detection means 36 ( A command is output to the drive means 40 to rotate the sorting member 35B by a predetermined angle so that the product W is replenished in one direction on both ends. Then, when instructed by the control unit 37, the driving unit 40 rotates the sorting member 35B by a predetermined angle. In addition, when the two detection values by the detection means 36 are both smaller than the reference value, the one having a larger difference from the reference value is adopted.
[0055]
In the distributed supply device 31C having the above-described configuration, the detection means 36 detects the layer thickness of the article W on both ends in the tank 2, and indicates the detection value when it is determined that the detection value is smaller than the reference value. The rotation of the sorting member 35B is controlled so that the item W is replenished at the position. Thereby, the layer thickness of the product W in the tank 2 can be made substantially uniform.
[0056]
In the distributed supply device 31C of the third embodiment, the detection means 36 are provided at two locations on both ends of the tank 2 where the layer thickness of the product W tends to decrease when the product W is supplied from the center of the tank 2. Although the provided configuration has been described, the detection means 36 may be provided at a plurality of locations in units of the supply trough 3, for example. In this case, the detection signal indicating the smallest value among the detection signals from each detection means 36 is compared with the reference value, and when it is determined that the detection signal is smaller than the reference value, the supply trough 3 indicating the detection value is handled. The rotation angle of the sorting member 35B is controlled so that the item W is replenished at a position in the tank 2 to be operated. Thereby, the layer thickness of the product W in the tank 2 corresponding to each supply trough 3 can be detected, and the product W can be replenished to the position where the layer thickness is the smallest.
[0057]
Next, a distributed supply device 31D of the fourth embodiment will be described with reference to FIG. In addition, the same number is attached | subjected to the component same as 1st and 2nd embodiment, and the description is abbreviate | omitted.
[0058]
As shown in FIG. 7, the dispersion supply device 31 </ b> D of the fourth embodiment measures the driving means 41 that rotates by a predetermined angle and the object W in the weighing hopper 5 in addition to the configuration of the second embodiment. The control unit 38 outputs a command to the drive unit 41 so as to rotate the distribution member 35B by a predetermined angle based on the measurement value of the measuring instrument 25.
[0059]
More specifically, the control means 38 receives the weighing values from all the weighing instruments 25 provided for each weighing hopper 5 and inputs each weighing value to a predetermined reference value (the weighing hopper 5 measures the minimum necessary amount). Compared to the value to be If it is determined that there is a measurement value that is smaller than the reference value, the drive is performed to control the rotation angle of the sorting member 35B so that the item W is replenished at a position in the tank 2 that indicates the measurement value. A command is output to the means 41. The drive means 41 rotates the sorting member 35B by a predetermined angle when instructed by the control means 38. At this time, when there are a plurality of measurement values indicating values smaller than the reference value, the measurement value indicating the value having the largest difference from the reference value is adopted.
[0060]
In the distributed supply device 31D having the above-described configuration, the layer thickness of the article W in the tank 2 is detected in a pseudo manner based on the measurement value of the measuring instrument 25 that measures the object W in the measurement hopper 5, and the measurement value is greater than the reference value. When a small value is indicated, the rotation of the sorting member 35B is controlled so that the item W is replenished to the position in the tank 2 indicating the value. Thereby, the layer thickness of the product W in the tank 2 can be made substantially uniform.
[0061]
In the above-described fourth embodiment, the measurement values from all the weighing instruments 25 provided for each weighing hopper 5 are described as being input to the control means 38. However, the layer thickness of the article W may be reduced. The weighing values from the weighing instrument 25 of the weighing hopper 5 corresponding to at least two locations on both ends of the tank 2 may be input to the control means 38. Moreover, it is good also as a structure which used together 3rd Embodiment mentioned above and 4th Embodiment. In this case, when the detection value of the detection means 36 is smaller than the reference value and the measured value is smaller than the reference value, the sorting member 35B is rotated so that the article W is replenished to the position in the tank 2 indicating the value. Is controlled dynamically. As a result, the layer thickness of the product W in the tank 2 can be made more uniform.
[0062]
As described above, according to the distributed supply device 31 (31A to 31D) of this example, replenishment including large mechanical components as in the past between the transport device 34 such as a supply bucket or bucket conveyor and the tank 2 is provided. Without disposing the apparatus, a simple component part made up of a fixed distribution member 35A or a rotation-type distribution member 35B made of a plate material is provided at a position above the center of the tank 2 so that the inside of the tank 2 By effectively using the space, the difference in the layer thickness of the product W at the center and both ends in the tank 2 can be reduced, and the layer thickness of the product W in the tank 2 can be made uniform.
[0063]
If the product W distributed by the distribution member 35 is a dry product, the product W is distributed and distributed in the tank 2 without adhering to the distribution member 35. Moreover, even if the sorted products W are piled up somewhat, they naturally collapse and spread to the periphery, and the difference in layer thickness between the replenished position and the surrounding products is reduced.
[0064]
In the case of adopting the rotating type distribution member 35B, the rotation angle of the distribution member 35B is controlled based on the detected value of the layer thickness of the article W on both ends in the tank 2, or the weighing hopper 5 The rotation angle of the sorting member 35B is controlled based on the measured value of the weighing instrument 25 provided for each time, and further, the rotation angle of the sorting member 35B is controlled using these together. Accordingly, the product W can be replenished more strictly at a position where the layer thickness of the product W is small, and the layer thickness of the product W in the tank 2 can be made uniform.
[0065]
In addition, a rotation-type distribution member 35B is adopted, and the detection signal from the detection means 36 provided in units of the supply trough 3 and / or the measurement values from all the measuring instruments 25 provided for each measurement hopper 5 are used. If the rotation angle of the sorting member 35B is controlled based on the above, the product W is supplied not only to both ends in the tank 2 but also to the position where the product W has a small layer thickness, and the entire layer thickness is made uniform. Can do.
[0066]
【The invention's effect】
  As is apparent from the above description, according to the present invention, it is constituted by a plate material without arranging a replenishing device composed of large mechanical components as in the prior art.TimesA dynamic distribution member is provided at a position above the center of the tank so that the space in the tank can be used effectively, and the layer thickness of items in the tank can be made uniform.
[0067]
In addition, if a rotating distribution member is adopted and the rotation angle of the distribution member is controlled based on the detection signal from the detection means and the measurement value from the measuring device provided for each weighing hopper, It is possible to make the entire layer thickness uniform by supplying the object to be measured to a position where the layer thickness of the object to be measured is small, not limited to both ends.
[Brief description of the drawings]
FIG. 1 is a side view showing the overall configuration of a combination weighing device in which a distributed supply device according to the present invention is employed.
FIG. 2 is a plan view of the combination weighing device of FIG.
FIG. 3 is a front view of the combination weighing device of FIG.
FIG. 4 is a schematic configuration diagram showing a first embodiment of a distributed supply apparatus according to the present invention.
FIG. 5 is a schematic configuration diagram showing a second embodiment of a distributed supply apparatus according to the present invention;
FIG. 6 is a schematic configuration diagram showing a third embodiment of a distributed supply apparatus according to the present invention.
FIG. 7 is a schematic configuration diagram showing a fourth embodiment of a distributed supply apparatus according to the present invention;
FIG. 8 is a front view of an article supply device employed in a conventional combination weighing device.
9A and 9B are operation diagrams of the article supply apparatus of FIG.
FIGS. 10A and 10B are operation diagrams according to another configuration of the article supply apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Combination measuring device, 2 ... Tank, 3 ... Supply trough, 5 ... Weighing hopper, 25 ... Measuring device, 31 (31A-31D) ... Dispersion supply device, 32 ... Top opening, 33 ... Bottom opening, 35 ( 35A, 35B) ... distribution member, 35a ... bent portion, 35b ... inclined surface, 36 ... detection means, 37, 38 ... control means.

Claims (2)

A cylindrical shape having openings (32, 33) on the upper surface and the bottom surface, respectively, the object to be weighed (W) is supplied from the center of the opening (32) on the upper surface, and below the opening (33) on the bottom surface. A plurality of supply troughs (3) arranged in a horizontal row, and tanks (2) for supplying the objects to be weighed to each of the plurality of supply troughs;
An inclined surface (35b) is formed so as to be rotatable above a central portion of the tank, and the object to be weighed is dispersed by the inclined surface with respect to a position where the layer thickness of the object to be weighed is small. A flat-shaped sorting member (35B) to be sorted and
Detection means (36) for detecting the layer thickness of the objects (W) at least at two positions on both ends in the tank (2);
When it is determined that the detection value of the detection means is smaller than a preset reference value, the distribution member is rotated so that the object to be measured is replenished to a position in the tank indicating the detection value. A distributed supply device comprising control means (37) for controlling . Combination weighing that weighs the object to be weighed (W) with multiple weighing units, selects a combination that satisfies the target weight range from the combinations of the objects to be weighed, and collects and discharges the selected objects to be weighed In device (1):
A cylindrical shape having openings (32, 33) on the top and bottom surfaces, respectively, the object to be weighed is supplied from the center of the opening (32) on the top surface, and a plurality of objects are provided below the opening (33) on the bottom surface. Supply troughs (3) arranged in a horizontal row, and tanks (2) for supplying the objects to be weighed to the plurality of supply troughs,
The object to be weighed is provided at a position above the center of the tank so as to form an inclined surface (35b), and the object to be weighed by the inclined surface with respect to a position where the layer thickness of the object to be weighed (W) is small. A distributed supply device (31) having a plate-like distribution member (35B) for distributing and distributing
A plurality of weighing hoppers (5) arranged corresponding to the plurality of supply troughs (3);
A plurality of weighing devices (25) provided for each of the plurality of weighing hoppers (5) and weighing the objects to be weighed;
When it is determined that the measurement value is smaller than a preset reference value by inputting a measurement value from a measuring instrument that weighs objects to be stored in weighing hoppers corresponding to at least two positions on both ends of the tank. in, wherein the objects to be weighed to the position in the tank indicating the weight value (W) has a control means for controlling the rotation of the sorting member so as to be replenished (38) combination weighing Equipment .

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