JPH09196745A - Combination measuring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To discharge and assemble material to be measured having stickiness efficiently. SOLUTION: The material, which is measured by each measuring hopper 35 and selected in combination, is contained in a timing hopper 50, respectively. The timing hoppers 50, which have received the material from the measuring hoppers 35, are opened in the time sequence proportional to the distances from the assembling positions. The materials contained in the timing hoppers 50 are discharged so that the materials are assembled on conveyers 65 and 66. At this time, each timing hopper 50 is opened so that the position of the material that is discharge later on the conveyer is closer to the assembling position in the specified range with respect to the position of the material that is previously discharged on the conveyer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for efficiently collecting and discharging sticky objects to be weighed in a combination weighing device that individually discharges articles having different weights in a target amount. .

[0002]

2. Description of the Related Art A combination weighing apparatus has been conventionally used in order to efficiently discharge a food or the like having a weight variation individually in a target amount. The combination weighing device supplies foods and other objects to be weighed to a plurality of weighing hoppers, weighs each, and based on the weighing results from each weighing hopper, selects the optimum combination that is close to or equal to the set target amount, and selects this combination. The selected objects to be weighed are discharged from the weighing hopper, and the discharged objects to be weighed are collectively collected and discharged from a predetermined position.

In this type of weighing device, a funnel-shaped collecting chute is used to collect the objects to be weighed, which have been selected in combination and discharged from the weighing hopper, and discharge them to a predetermined position. When collecting and discharging the objects to be weighed, it is possible to use a collecting chute with a gentle inner wall, so arrange multiple weighing hoppers in an annular shape along the edge of the collecting chute with a large opening surface at the top. You can

[0004] However, in the case of collecting and discharging an object to be weighed, which contains water and oil and has adhesiveness, such as pickles and cooked meat products, it is necessary to use a collecting chute with a wide upper opening and a gentle slope on the inner wall. , The object to be weighed adheres to its inner wall,
Since the quantity of the objects to be weighed selected in combination and the quantity of the objects to be weighed actually discharged from the collecting chute are different, accurate weighing cannot be performed.

As a technique for solving this, Japanese Patent Laid-Open No. 4-3
In No. 63630, a weighing hopper and a pool hopper for supplying an object to be weighed to each weighing hopper are formed into a cylindrical shape to prevent an adhesive object to be weighed from remaining in the hopper and to lower the weighing hopper. Place a table-shaped collecting board on the
The objects to be weighed discharged from each weighing hopper onto the collecting plate are gathered together in the center of the collecting plate by a pair of slidable scrapers, and dropped into the opening surface of the collecting chute with a small diameter and the inner wall having a steep slope. A combination weighing device is disclosed.

However, after the objects to be weighed thus discharged from the weighing hopper are dropped onto the table-shaped collecting plate, the pair of scrapers are slid to collect the objects to be measured in the center of the collecting plate and to collect them. In the method of dropping it into the chute, the next object to be weighed cannot be discharged unless the pair of scrapers are returned to the original positions, so that there is a problem that the operation efficiency of the weighing device decreases.

Therefore, for example, as shown in FIG. 15 (a), the objects to be weighed discharged from the respective weighing hoppers 1, 1, ... It is also conceivable to transport the sheets to the gathering position (the right end side in FIG. 15) to gather them.

[0008]

However, when the objects to be weighed selected for the combination are to be discharged from the respective weighing hoppers 1 onto the conveyor 2 all together to be collected, the objects to be weighed selected for the previous combination are to be collected. In order to prevent the objects and the objects to be weighed selected for the next combination from being mixed, as shown in FIG. 15B, from the weighing hopper farthest to the gathering position (the weighing hopper at the left end in FIG. 15). The discharged objects to be weighed are the weighing hoppers closest to the collecting position (the weighing hopper at the right end in FIG. 15).
After a lapse of time T (L / V where the speed of the conveyor is V and the distance between the left end and the right end weighing hoppers is L) before passing below, is further selected for the previous combination. The objects to be weighed selected for the next combination must be discharged from each weighing hopper after waiting for a time Ta required to prevent mixing with the objects to be weighed.

Moreover, this time Ta tends to be longer as the tackiness of the object to be weighed is stronger, and if this time Ta is about the same as the time T, it is about the same as the method using the scraper described above. There is a problem that only efficiency can be obtained, the effect of using a conveyor that does not require a return drive is completely eliminated, and the operation efficiency of the entire apparatus is not improved.

Further, as described above, when the objects to be weighed are simultaneously discharged from the respective weighing hoppers 1 onto the conveyor 2, the conveyors 2
The objects to be weighed will be discharged over a wide area above, the dirt on the conveyor's transport surface will be severe, and the amount of the objects to be weighed on the conveyor surface will increase. Another problem arises in that the amount of objects to be weighed in is increased.

Therefore, it is conceivable to discharge the objects to be weighed selected for the combination onto the conveyor in order from the farthest position from the collecting position so that the objects to be weighed are concentrated at the same position on the conveyor. However, when the objects to be weighed are concentrated at the same position on the conveyor in this way, the height of the objects to be weighed on the conveyor becomes high, and therefore the gap between the weighing hopper 1 and the conveyor 2 must be made large. However, if the gap is increased, the dropping time of the objects to be weighed to the conveyor becomes long. Further, since the fall distance becomes large, the spread of each item to be weighed on the conveyor is increased, and if the width of the conveyor is narrow, the length of the item to be weighed along the conveying direction of the conveyor is extended to the rear side, It is necessary to take an interval more than necessary with the subsequent set of objects to be weighed, which causes a problem of lowering efficiency.

It is an object of the present invention to solve this problem, to improve the operation efficiency, and to provide a combination weighing device capable of efficiently discharging and collecting sticky articles.

[0013]

In order to solve the above-mentioned problems, the combination weighing device according to claim 1 of the present invention comprises a plurality of cylindrical weighing hoppers arranged so as to be arranged substantially linearly in the lateral direction. A combination weighing device for supplying and weighing objects to be weighed, selecting a combination of the objects to be weighed based on the measured value, and collecting the objects to be weighed selected in the combination at a predetermined collecting position, Located below the hopper,
A plurality of tubular timing hoppers for respectively storing the objects to be weighed discharged from the weighing hopper, and the plurality of timing hoppers are arranged below the plurality of timing hoppers so that the conveyance directions are aligned with the alignment direction of the plurality of timing hoppers. A conveyor that receives the objects to be weighed discharged from a plurality of timing hoppers and carries them out to the gathering position side, and a timing hopper that contains the objects to be weighed selected for the combination among the plurality of timing hoppers. It has a timing hopper opening / closing means for opening and closing in order from the gathering position to collect the objects to be weighed selected for the combination on the conveyor, and the timing hopper opening / closing means is for the objects to be weighed selected for the combination. Of these, the position on the conveyor of the object to be weighed that was discharged earlier is the position on the conveyor of the object to be weighed discharged later. And opening and closing the respective timing hoppers to be shifted within the range.

Further, in the combination weighing device according to the second aspect of the present invention, the timing hopper opening / closing means is one of the objects to be weighed selected for the combination, relative to the position on the conveyor of the first object to be weighed. The respective timing hoppers are opened and closed so that the position of the objects to be weighed discharged later than this on the conveyor shifts toward the collecting position within a predetermined range.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 6 show the appearance and the schematic structure of each part of a combination weighing device 20 of one embodiment for weighing an object to be weighed having an adhesive property. In these figures, a substantially rectangular parallelepiped casing 22 is supported on a base 21 of the combination weighing device 20. A plurality of electromagnetic vibrating devices 23 (10 in this example) are arranged in a row in the width direction of the housing 22 in the upper part of the housing 22, and the vibrating shafts 23 a of the respective vibrating devices 23 are arranged in the housing 22. Is projected from the upper surface 22a.

A trough 24 formed in a gutter shape is attached to the upper end of each vibrating shaft 23a so as to face the front of the housing 22. An object to be weighed is supplied to each of the transport troughs 24 by a chute, a bucket conveyor, or manual insertion (not shown).

Each vibrating device 23 vibrates each transport trough 24 back and forth toward the front side of the housing 22 by energizing for a predetermined time to vibrate and transport the object to be weighed on the transport trough 24 to the front end side. To do.

Below the front end of each transport trough 24, a pool hopper 25 in the shape of a hollow square tube whose upper and lower sides are opened in a substantially square shape.
Are arranged respectively. The pool hopper 25 is shown in FIG.
As shown in FIG. 2, a flange portion 26 is formed of synthetic resin and extends at the front and rear edges of the lower opening surface that is slightly smaller than the upper opening surface. One flange portion 26 has two locking holes. 27 are provided.

Each pool hopper 25 has a front surface 2 of the housing 22.
It is supported by frame bodies 28 attached to the left and right of 2b. That is, five pin fixing plates 29 are attached at predetermined intervals inside the front plate 28 a of each frame 28, and each pin fixing plate 29 is the same as the locking hole 27 of the pool hopper 25. Two locking pins 31 are provided upright at intervals.
Further, between the front plate 28a of the frame 28 and the front surface 22b of the housing 22, a pair of guide shafts 32 are installed in parallel on both sides of the pair of locking pins 31, respectively.
A bottom plate 33 is supported on each of the above. Each bottom plate 33 engages with one guide shaft 32 on the back side thereof,
It is supported slidably in the front-back direction.

Each pool hopper 25 has a pair of locking pins 3.
In the state in which the locking hole 27 is locked to the first plate 1, it is supported so as to be placed on the bottom plate 33. Each bottom plate 33 is formed in a substantially rectangular shape having a size that closes the lower opening surface of the pool hopper 25, and the rear side of one side thereof is the front surface 2 of the housing 22.
It is detachably connected to the tip of a cylinder shaft 34a protruding from 2b. Each cylinder 3 provided in the housing 22
4 pulls in each cylinder shaft 34a until the front end of the bottom plate 33 is below the rear flange of the pool hopper 25, opens the lower opening surface of each pool hopper, and the front end of the bottom plate 33 of the pool hopper 25. The cylinder shafts 34a are pushed out until they come under the front flange portion, and the lower opening surface of each pool hopper 25 is closed.

Below the pool hoppers 25, weighing hoppers 35 having the same shape as the pool hoppers 25 are arranged in a line in the lateral direction.

Each of the weighing hoppers 35 is supported in a direction in which the front and rear of the pool hopper 25 are opposite to each other, and as shown in FIG. 5, the two locking holes 3 provided in one of the collar portions 36.
7 is supported by each hopper support 40 supported on the front surface 22b of the housing 22.

Two locking pins 41 are projectingly provided on the upper surface of the hopper support body 40, and both ends of the hopper support body 40 extend in parallel to the front at intervals slightly wider than the intervals of the locking pins 41. A pair of guide shafts 42 are attached, and bottom plates 43, which are guided by the pair of guide shafts 42 and are slidable in the front-rear direction, are supported on the guide shafts 42. Each weighing hopper 35 is supported so as to be placed on the bottom plate 43 in a state in which the locking holes 37 are locked by the pair of locking pins 41.

Each bottom plate 43 is the bottom plate 3 of the pool hopper 25.
3 is formed in a rectangular shape of a size that closes the lower opening surface of the weighing hopper 35, and the rear side of one side thereof is detachably attached to the tip of the cylinder shaft 44a protruding from the front surface of the housing 22. It is connected. Each cylinder 44 provided in the housing 22 pushes out each cylinder shaft 44a, moves each bottom plate 43 forward, opens the lower opening surface of each weighing hopper 35, and retracts each cylinder shaft 44a. Each bottom plate 4
3 is moved to the housing side to close the lower opening surface of each weighing hopper 35.

Each hopper support 40 is detachably connected to a disc-shaped connecting plate 45 arranged on the front surface of the housing 22 via a locking mechanism 46. Each connecting plate 45 is
It is supported by each weighing device 47 fixed as a weighing device in the housing, and each cylinder 44 is also fixed to the connecting plate 45, and the cylinder shaft 44a of the cylinder 44 is inserted through the connecting plate 45. It projects to the front of the housing 22.

Therefore, each weighing device 47 includes a weighing hopper 35, a hopper support 40, a guide shaft 42, a bottom plate 43, and
The load of the cylinder 44, the connecting plate 45, and the locking mechanism 46 is constantly applied, and the load of the object to be weighed is added to this steady load. Below each weighing hopper 35, a timing hopper 50 having the same shape as the pool hopper 25 is arranged.

The timing hoppers 50 are supported in a horizontal row on the front side of the housing 22, just like the pool hoppers 25. That is, as shown in FIG. 4, the two locking holes 52 provided in the one flange portion 51 at the lower end of each timing hopper 50 are provided with a frame body 53 fixed to the left and right of the front surface 22b of the housing 22. The front plate 53a of the frame 53 is locked by the locking pin 56 protruding from the pin fixing plate 54 on the inner edge of the front plate 53a of the frame 53.
And a pair of guide shafts 5 installed in parallel between the housing and the front surface of the housing.
8 is mounted on a bottom plate 59 which is supported on 8 and slides back and forth.

Each bottom plate 59 is formed in a rectangular shape having a size that closes the lower opening surface of the timing hopper 50, and the rear side of one side thereof is at the tip of the cylinder shaft 60a protruding from the front surface of the housing 22. It is detachably connected. Case 22
Each cylinder 60 inside pulls in each cylinder shaft 60a, moves each bottom plate 59 to the housing 22 side, opens the lower opening surface of each timing hopper 50, and pushes out each cylinder shaft 60a to generate each bottom plate 59. Is moved forward to close the lower opening surface of each timing hopper 50.

Below the plural (10 in this embodiment) timing hoppers 50, two conveyors 65, 66 are provided.
Are arranged on the left and right. Two conveyors 65, 66
Are symmetrically formed, the left conveyor 65 receives the objects to be weighed discharged from the left five timing hoppers and conveys them to the right end, and the right conveyor 66 discharges from the right five timing hoppers. Receive the object to be weighed and convey it to the left end.

The two conveyors 65 and 66 are composed of a pair of rollers 67 and 68, a conveyor belt 69 stretched between the rollers, and a motor 70 for rotating one roller 67 in the housing 22. , A pair of rollers 67, 68
One end side of which is rotatably supported by the front surface 22b of the housing 22 and is arranged in parallel in the lateral direction in a direction orthogonal to the front surface of the housing 22. Are received on the upper surface of the conveyor belt 69 and are conveyed to one roller 67 side.

A member (not shown) is provided between the rollers of the conveyors 65 and 66 to support the conveyor belt 69 from its lower surface and prevent distortion of the conveyor belt due to the weight of the object to be weighed. There is.

A funnel-shaped collecting chute 80 is supported below the two conveyors 65 and 66.

As shown in FIG. 6, the upper opening surface 81 of the collecting chute 80 is formed in a quadrangular shape having a minimum size necessary to receive the objects to be weighed out from the ends of the conveyors 65 and 66. The slope of the inner wall surface from the upper opening surface 81 to the lower discharge port 82 is steep so that the received sticky object can be reliably discharged.

The collecting chute 80 is provided on the front surface 22 of the housing 22.
The pair of support members 83 protruding in parallel from b to the front are supported in a state where they can be pulled out forward. Between the left edge of the upper opening surface 81 of the collecting chute 80 and the lower surface of the right end of the conveyor 65, and between the right edge of the upper opening surface 81 and the lower surface of the left end of the conveyor 66, there is a long plate shape. Return regulation plates 84 and 85 are arranged along the width direction of each conveyor.

The return regulating plates 84 and 85 are thin rectangular and have a length substantially equal to the belt width of the conveyors 65 and 66, and the upper edge portions 84a and 85a thereof have conveyors 65 and 6 respectively.
Proximity to the conveyor belt on the bottom side of 6 (almost in contact)
In this state, the lower edge portions 84b, 85b project in parallel from the front surface of the housing 22 toward the front, and the pair of rotating shafts 86, 8
7 is fixed.

The rotary shafts 86 and 87 are driven by the two motors 88 and 89 provided in the housing 22 so that the return regulating plate 8 can be rotated.
The Nos. 4 and 85 are rotated toward the inner side of the collecting chute 80 by a predetermined angle and driven to return to the original position.

Each of the above-mentioned vibration devices 23, cylinders 34,
44, 60, motors 70, 70 and motors 88, 89
Are controlled by the control unit shown in FIG.

That is, the combination selecting means 90 detects the weight of the object to be weighed supplied to each weighing hopper from the output signal of each weighing device 47, and the total of the weight values is close to the preset target weight. The weighing hopper opening / closing means 9 selects a combination of objects to be weighed that are equal to each other, and outputs a combination signal designating a weighing hopper containing the objects to be weighed selected in the combination.
Output to 1.

The weighing hopper opening / closing means 91 is a cylinder 4 corresponding to the weighing hopper 35 designated by the combination signal.
4 are driven almost at the same time to open and close the bottom plate 43 to discharge the objects to be weighed selected for the combination all at once, and to discharge the objects to be weighed and empty the weighing hoppers and the weighing hoppers. Weighing hopper discharge signal for designating a timing hopper that has received a weighing object (for example, a 10-bit signal that corresponds to each weighing hopper 35 bit by bit, becomes an empty weighing hopper, that is, a timing hopper that receives an object to be weighed. A signal such that only the data of the bit corresponding to [1] is output to the pool hopper opening / closing means 92 and the timing hopper opening / closing means 94. The weighing hopper opening / closing means 92 is a timing hopper opening / closing means 94 described later.
The combination signal from the combination selection means 90 is received in a state where the weighing hopper opening / closing permission signal from the device is received.

The pool hopper opening / closing means 92 drives the cylinders 34 of the pool hopper 25 corresponding to the weighing hopper specified by the weighing hopper discharge signal at substantially the same time to open / close the bottom plate 33 and cover the empty weighing hopper. A feeder driving means 93 sends a pool hopper discharge signal that specifies the pool hopper that has been emptied by this discharge while supplying the weighing object.
Output to The feeder driving means 93 drives the vibrating device 24 corresponding to the pool hopper designated by the pool hopper discharge signal for a predetermined time, and supplies the object to be weighed to the empty pool hopper 25.

On the other hand, the timing hopper opening / closing means 94 is
The weighing hopper discharge signal from the weighing hopper opening / closing means 91 is temporarily stored, and the conveyor drive circuit 10 is received every time the gathering signal is received.
2 is driven to drive the conveyors 65 and 66 at a predetermined speed V for about a half turn, and the plurality of timing hoppers 50
The timing hoppers 50 and 50 at the farthest ends from the collecting chute 80 to the timing hoppers 50 and 50 at the innermost ends are sequentially designated at predetermined time intervals corresponding to the transport speeds of the conveyors 65 and 66, and designated. When the object to be weighed is stored in the selected timing hopper,
The timing hoppers 50 are opened and closed to discharge the objects to be weighed, and the objects to be weighed stored in the respective timing hoppers 50 are gathered on the conveyors 65 and 66 while being appropriately dispersed, and conveyed to the gathering chute 80 side. .

In order to carry out such an operation, the timing hopper opening / closing means 94 is constructed, for example, as shown in FIG.

That is, the latch circuit 95 temporarily stores the weighing hopper discharge signal output from the weighing hopper opening / closing means 91 as a signal indicating the timing hopper in which the object to be weighed is accommodated. The latch circuit 95 is a 10-bit one corresponding to the number of the timing hoppers 50 (weighing hoppers 35). The most significant bit 95a and the least significant bit 95j are located at the farthest positions (from the left side) in the collecting chute 80. (1st and 10th) timing hoppers 50 and 50, bits 95b and 95i correspond to the second and ninth timing hoppers 50 and 50 from the left, and bits 95c and 95h correspond to the third from the left. Corresponding to the eighth timing hoppers 50, 50 respectively, bit 95d,
95g is the 4th and 7th timing hopper 5 from the left
Bits 95e and 95f correspond to 0 and 50, respectively, and correspond to the fifth and sixth timing hoppers 50 and 50 from the left closest to the collecting chute 80, respectively.

The data of each bit stored in the latch circuit 95 is the switch (AND circuit etc.) 96 of the selection circuit 95.
a to 96j, respectively. The switches 96a to 96j of the selection circuit 95 receive the designated output of [1] from the shift circuit 100, which will be described later, and sequentially turn on to selectively output the data of each bit of the latch circuit 95. That is,
The switches 96a and 96j output Q1 of the shift circuit 100.
Is turned on when the data [1] is output to the switch 9
6b and 96i turn on when the data [1] is output to the output Q2 of the shift circuit 100, and the switches 96c and 9i.
6h is turned on when the data [1] is output to the output Q3 of the shift circuit 100, the switches 96d and 96g are turned on when the data [1] is output to the output Q4 of the shift circuit 100, and the switch 96e, 96f is a shift circuit 10
It turns on when the data [1] is output to the output Q5 of 0.

The data output from the selection circuit 95 is input to the cylinder drive circuits 97a to 97j, respectively.
Upon receiving the data [1], the cylinder drive circuits 97a to 97j drive the cylinders 60 of the corresponding timing hoppers 50 to open and close the timing hoppers 50.

The shift circuit 100 starts / stops as described later.
2 when receiving the start signal from the stop circuit 101
A signal of data [1] for designating one set each of five timing hoppers 50 in order from the farthest from the collecting chute 80 is a space between the timing hoppers 50 at the conveying speed V of the conveyors 65 and 66. Q1 → Q2 → Q3 → Q4 → at a time interval Tc ′ (= Tc−ΔT) slightly (ΔT) shorter than the time Tc (= P / V) obtained by dividing P.
Output while shifting in the order of Q5. Here, Δ
T is set to about 1/10 to 1/5 of Tc, for example.

The start / stop circuit 101 outputs the start signal to the shift circuit 100 when receiving the collective signal, and outputs the stop signal to the shift circuit 100 after the data [1] is output to the output Q5 of the shift circuit 100. Then, all the outputs Q1 to Q5 of the shift circuit 100 are

[0]
In addition to the above state, a weighing hopper opening / closing permission signal is output to the weighing hopper opening / closing means 91. This start /
The start signal of the stop circuit 101 is the conveyor 65,
The signal for activating 66 is output to the conveyor driving means 102.

The collective signal input to the start / stop circuit 101 may be, for example, a case where the collective signal is input from an external device such as a line for receiving and transporting the objects to be weighed out from the collecting chute 80 into a container. The combination weighing device itself may occur, but here, the combination weighing device itself confirms that it is ready to receive the objects to be weighed on the line, while checking each timing from each weighing hopper 35. It is assumed that the collective signal is generated immediately after the objects to be weighed are discharged to the hopper 50.

On the other hand, the conveyor driving means 102 drives the conveyors 65 and 66 at a predetermined speed V for about half a turn each time the start signal from the start / stop circuit 101 is received, and at the timing when the drive for the half turn is completed. , And outputs a start signal to the return regulation plate drive means 103. When receiving the start signal from the conveyor driving unit 102, the return regulating plate driving unit 103 drives the motors 88 and 89 to rotate the return regulating plates 84 and 85 toward the collecting chute 80 by a predetermined angle. Return to the original position again.

Next, the operation of this combination weighing device will be described with reference to FIG. In FIG. 9, the pool hopper 25
Is omitted and the object to be weighed is indicated by diagonal lines.

It is assumed that the objects to be weighed are supplied to all the transport troughs 24, pool hoppers 25, and weighing hoppers 35 in advance.

Here, the combination selection means 90 measures the weight of the objects to be weighed contained in each weighing hopper 35.
Of the objects to be weighed so that the total of the weight values thereof is close to or equal to the preset target weight.

Then, for example, from the left, 2, 5, 9, 10
When the objects to be weighed accommodated in the fourth four weighing hoppers 35 are selected as a combination, a corresponding combination signal is output to the weighing hopper opening / closing means 91, and the weighing hoppers 35 designated by the combination signals are displayed. The objects to be weighed that have been opened and closed and selected for the combination are, as shown in FIG. 9A, the second, fifth, ninth, and tenth timing hoppers 5 from the left.
It is discharged to 0 almost at the same time.

At this time, the weighing hopper discharge signal is output to the pool hopper opening / closing means 92 and the timing hopper opening / closing means 94, and the latch circuit 95 of the timing hopper opening / closing means 94 is fed to the weighing hopper as shown in FIG. The data corresponding to the timing hopper 50 accommodating the object is [1]
The weighing hopper discharge signal [0100100011] is latched.

The pool hopper 25 corresponding to the four empty weighing hoppers 35 is opened / closed by the pool hopper opening / closing means 92, and a new object to be weighed is immediately supplied as shown in FIG. The object to be weighed is weighed. Further, the transport trough 24 corresponding to each of the empty pool hoppers 25 is vibrated and driven by the feeder driving means 93, a new object to be weighed is supplied to the empty pool hoppers 25, and the next to the weighing hoppers 35. To prepare for supply.

On the other hand, since the collective signal is input to the timing hopper opening / closing means 94 immediately after the objects to be weighed are discharged from the respective weighing hoppers 35, the motors 70, 70 of the conveyors 65, 66 are driven by the conveyor driving means 102. Both conveyors 65, 66 are driven to be conveyed to the collecting chute 80 side at the same speed V, and the timing hopper opening / closing means 94 causes the timing hopper 50 containing the objects to be weighed to be farther from the collecting chute 80. It opens and closes in order.

That is, immediately after the objects to be weighed are discharged from each weighing hopper 35, the output Q1 of the shift circuit 100 becomes [1], which is 1 from the farthest left from the collecting chute 80.
Latch data for the specified timing hoppers 50 and 50

[0] and [1] are output to the cylinder drive circuits 97a and 97j, and the tenth timing hopper 50 from the left that receives the object to be weighed is opened and closed, and the object to be weighed is opened as shown in FIG. 9B. W10 is discharged onto the conveyor 66.

Then, when Tc '(= Tc-ΔT) time has elapsed since the tenth timing hopper 50 from the left opened, the output Q2 of the shift circuit 100 becomes [1], and the second and ninth from the left. Timing hoppers 50, 5
0 is designated, the latch data [1] and [1] are selected, and the second and ninth timing hoppers 50, 50 from the left are opened and closed as shown in (c) of FIG. The objects W2 and W9 stored in the two timing hoppers 50 and 50 are discharged onto the conveyors 65 and 66, respectively. This discharge timing is earlier than the time Tc from the discharge timing of the tenth timing hopper 50 from the left by ΔT time. Therefore, the object W9 is slightly smaller than the object W10 on the conveyor 66 (ΔT · V). ) To the position closer to the transport direction and falls. Therefore, the shape of the entire object to be weighed on the conveyor 66 is almost bimodal, and its height does not increase. Further, the spread of the object to be weighed W9 dropped on the conveyor 66 to the rear side is caused by the object to be weighed W10.
Regulated by the mountains.

When the time Tc '(= Tc-ΔT) has further elapsed, the third and eighth timing hoppers from the left are designated. However, since the objects to be weighed are not accommodated in both hoppers, these timings are set. The hopper cannot be opened or closed. This is the same when the fourth and seventh timing hoppers from the left are designated.

Then, when 4Tc 'time has elapsed from the discharge timing of the outermost timing hopper, the output Q5 of the shift circuit 100 becomes [1], and the fifth and sixth from the left closest to the collecting chute 80. Timing hopper is specified and its latch data [1],

[0] is selected, and as shown in FIG. 9D, the fifth timing hopper 50 that has accommodated the object to be weighed is opened and closed, and the object W5 to be weighed is discharged onto the conveyor 65. This discharge timing is earlier than the time 3 · Tc from the discharge timing of the second timing hopper 50 from the left by 3ΔT time, and therefore the object to be weighed W5 is smaller than the object to be weighed W2 on the conveyor 66. It slightly shifts (3 · ΔT · V) to a position closer to the transport direction and falls. For this reason, the shape of the entire object to be weighed on the conveyor 66 is a bimodal shape, and its height does not increase. Further, the object W5 to be weighed by the movement of the conveyor 66
Of the object to be weighed is restricted by the mountain of the object to be weighed W2.

When the objects to be weighed in the two innermost timing hoppers 50 closest to the collecting chute 80 are discharged, the timing hopper opening / closing means 94 to the weighing hopper opening / closing means 92.
A weighing hopper discharge permission signal is output to, and the next set of objects to be weighed, which has already been selected and selected by the combination selecting means 90, is immediately discharged to each timing hopper 50 by the weighing hopper opening / closing means 91, and the weighing hopper opening / closing means 91 shown in FIG. The state similar to that of (a) is restored, and immediately after that, the next collective signal is input.

On the other hand, the objects to be weighed, which are conveyed to the collecting chute 80 while being collected on the conveyors 65 and 66, are carried out from one end of each of the conveyors 65 and 66 almost at the same time.
At this time, the objects to be weighed that are not in contact with the transport surfaces of the conveyors 65 and 66 and the objects to be weighed that are in contact with the transport surfaces with a weak adhesive force are as shown in FIG.
Falls into the collecting chute 80 from the end.

Then, even a slight object to be weighed, which is in contact with the conveying surfaces of the conveyors 65 and 66 with a strong adhesive force and has fallen into the lower surface side of the conveyor without dropping into the collecting chute 80, the return regulating plate 84, At the timing of being scraped off from the conveyor belt by the upper edge portions 84a and 85a of 85, falling into the collecting chute 80, and driving of the conveyors 65 and 66 for a half turn is completed, as shown in (b) of FIG. Then, the return regulation plates 84 and 85 rotate inward by a predetermined angle toward the inside of the collecting chute 80 and return to the original state, so that the objects to be weighed attached to the return regulation plates 84 and 85 also fall into the collecting chute 80.

In the same manner, the objects to be weighed, which are similarly weighed by the respective weighing hoppers 35 and selected in combination, are once housed in the timing hopper 50, and then discharged to the conveyors 65 and 66 in order from the collecting chute 80, and the conveyor 65. , 66 are collectively dispersed in a limited range within a limited range and are carried out to the collecting chute 80, and the collecting chute 8
It is discharged from 0. As described above, the conveyors 65 and 66 are restarted before being stopped during the period in which the collective signal is input each time the objects to be weighed are discharged from the respective weighing hoppers 35, so that the conveyors 65 and 66 are continuously restarted. Will be driven.

FIG. 11 shows the opening / closing timing of the weighing hoppers and the opening / closing of each timing hopper when the collective signal is input immediately after the objects to be weighed are discharged from each weighing hopper 35 to the timing hopper 50 as described above. 6 is a timing chart showing a timing relationship.

As can be seen from this timing chart, in the combination weighing device of this embodiment, immediately after each weighing hopper 35 containing the objects to be weighed selected for the combination is opened, the gathering chute at the gathering position. The first and tenth timing hoppers from the farthest left from 80 open, and thereafter, a time ΔT is slightly shorter than a time Tc (= P / V) obtained by dividing the interval P of the timing hoppers by the speed V of the conveyors 65 and 66. Collecting shoot 8 at time interval Tc '
The timing hoppers are sequentially opened and closed toward 0, and immediately after the timing hopper closest to the collecting chute 80 is opened and closed, the weighing hoppers containing the objects to be weighed selected for the next combination are opened and closed. The operation is repeated.

Therefore, in the combination weighing device 20, the set of objects to be weighed to the collecting chute 80 is carried out from the opening and closing timings of the timing hoppers at both ends farthest from the collecting chute 80 to the innermost position closest to the collecting position. Time T until opening / closing timing of the timing hopper 50
(= 4 · Tc ′) and the time Tb for discharging the objects to be weighed selected in the following combination from the weighing hopper 35 to the timing hopper 50, thereby obtaining T + Tb.

Here, the time Tb depends on the opening / closing time of the weighing hopper 35, and is significantly shorter than the time Ta required to prevent the objects to be weighed in each set from being mixed with each other, and moreover, the objects to be weighed selected for the combination. Since the objects are discharged so that they are gathered in an appropriately dispersed state in a limited range on the conveyor, the rear end of the set of objects to be weighed previously selected for the combination and the group selected for the next combination The tip of the object to be weighed is the conveyor 6
The time difference of being carried out from Nos. 5 and 66 is the time T or more, which is larger than the time Ta, and a sufficient time interval can be provided to prevent mixing of the objects to be weighed in each set.

Therefore, compared with the case where the timing hopper is not provided, the objects to be weighed can be discharged to the collecting position in a remarkably short cycle, and the effect of improving the operation efficiency due to the use of the conveyor which does not require the return drive is sufficiently provided. Can be demonstrated.

Further, since the objects to be weighed are gathered in a limited range on the conveyors 65 and 66 in an appropriately dispersed state and carried out to the collecting chute 80, the height of the objects to be weighed on the conveyors 65 and 66 is high. Therefore, the distance between the timing hopper and the conveyor can be reduced, and the fall distance of the object to be weighed can be shortened. Therefore, the spread of the dropped objects to be weighed on the conveyor is small. In addition, since the height of the objects to be weighed on the conveyor does not increase, even if the gap between the two conveyors 65 and 66 is not large, a bridge due to interference between the objects to be weighed out from both conveyors does not occur. The objects to be weighed can be smoothly assembled.

Since the position of the object to be weighed discharged later on the conveyor is shifted toward the collecting chute, the position of the object to be weighed discharged later on the conveyor is shifted. The backward spread of the weighing object is restricted by the previously discharged weighing object, and as a result, the backward spreading of the entire weighing object on the conveyor is limited to the spreading amount of the initially discharged weighing object. . Therefore, it is possible to reduce the distance from the set of objects to be weighed, which is selected as a combination later. In addition, the amount of the objects to be weighed in contact with the conveyor transport surface is small, the conveyor is less contaminated, and most of the objects to be weighed can be carried out from the conveyor to the collecting position. Even if it goes around, the amount can be made very small and can be discharged into the collecting chute 80 by a simple scraping mechanism.

[0072]

[Other Embodiments] In the above embodiment, only the timing hopper in which the objects to be weighed are stored is opened and closed among the plurality of timing hoppers. However, the timing hoppers designated in order from the farther to the gathering position are weighed. You may open and close it with or without objects.

Further, in the above-described embodiment, the plurality of timing hoppers on one conveyor are designated one by one from the farthest position to the nearer position from the gathering position. A plurality of (eg, 8) timing hoppers on one conveyor, a plurality (eg, 2) of adjacent ones being one set (eg, 4).
Alternatively, the timing hoppers may be designated one by one in order from the set position. Also in this case, the discharge may be performed so that the position on the conveyor is shifted for each set.

In the above embodiment, each weighing hopper 3
The timing hoppers 50 are provided below the weighing hoppers 5, respectively, but the timing hoppers are not provided below the weighing hoppers farthest from the gathering position, and the objects to be weighed discharged from the weighing hoppers farthest from the gathering position are not provided. You may make it discharge | emit on a conveyor directly. If you do this,
As compared with the above embodiment, the collective discharge efficiency is improved by the amount of time that the objects to be measured discharged from the weighing hopper farthest from the collecting position stay in the timing hopper.

Further, the timing hopper of the above embodiment is opened.
The closing means is the object to be weighed discharged from each timing hopper.
In order to collect the
A conveyor with a constant transport speed is fed by the gap P of the hopper.
The time interval Tc ′ that is shorter than the time Tc required for ΔT by ΔT
So, I specified the timing hoppers one by one in order.
Is the timing hopper farthest from the gathering position
Based on the timing to specify the
The timing to open and close the timing hopper to be discharged is_k= (K-1) Tc- (d₁+ D_Two+ ... + d_k-1)
・ ΔT  (However, k is a tie in the order of distance from the gathering shoot.
Ming hopper number, d_iIs the i-th timing hopper
1 if the object to be weighed is actually stored
If it is not acceptable, the value will be 0)
Specify the timing hopper farthest from the combined position
From the timing I did_KShould be ejected over time
Open the Kth timing hopper containing the object to be weighed.
The position of the object to be weighed on the conveyor is ΔT
-It is possible to shift by V.

By doing so, for example, as shown in FIG. 12A, even when the objects W1 and W5 to be weighed in the timing hopper which are spaced apart from the first and fifth from the left are discharged. Even when the objects W2 and W3 to be weighed in the timing hopper which are not spaced apart from each other as shown in (b) of FIG. 12 are discharged, the position of the objects to be weighed on the conveyor is ΔT. It is shifted by V, and the degree of dispersion does not vary.

In the above embodiment, the objects to be weighed in the next combination are not thrown into the timing hopper until all the objects to be weighed selected for the combination are discharged from the timing hopper. In 90, the next combination is selected from the objects to be weighed that have not been selected in the previous combination, and the next combination is selected while at least a part of the objects to be weighed selected in the previous combination is in the timing hopper. The objects to be weighed selected for are stored in other timing hoppers, and these objects to be weighed are discharged in order from the collecting position, and two or more sets of objects to be weighed are simultaneously conveyed on the conveyor with a predetermined gap. You may do it.

When a plurality of sets are conveyed while collecting the objects to be weighed on the conveyor as described above, two or more sets of the timing hopper opening / closing means shown in FIG. The conveyors 65 and 66 are constantly driven by controlling to switch at a time interval of 1
The regulation plate drive means 103 may be activated at the timing when the set of objects to be weighed is carried out from the conveyors 65 and 66.

In the combination weighing device of the above embodiment, a combination is selected from the objects to be weighed stored in the weighing hopper, the selected objects to be weighed are once stored in the timing hopper, and then discharged onto the conveyor. However, the weighing object weighed by the weighing hopper is discharged to the timing hopper, and a combination is selected from the objects to be weighed stored in the timing hopper, or the objects stored in the timing hopper are selected. The total weight of the objects to be weighed stored in the weighing hopper corresponding to the weighing object and its timing hopper and the individual weight of the objects to be weighed stored in the timing hopper are exclusively participated in the calculation, and the total weight is When the combination is selected, the timing hopper and the weighing hopper may be opened and closed at substantially the same timing.

Further, in the above-mentioned embodiment, the objects to be weighed selected for the combination are gathered by using two conveyors, but one conveyor receives the objects to be weighed discharged from all the timing hoppers. Alternatively, the weighing hopper and the timing hopper may be divided into three or more sets, and the objects to be weighed discharged from the timing hoppers of each set may be received by three or more conveyors.

Further, in the above-described embodiment, the objects to be weighed discharged onto the conveyor first are slightly shifted toward the gathering position with respect to the objects to be weighed first discharged onto the conveyor, but the spread when dropping is small. In the case of an object, the falling position may be displaced arbitrarily, for example, the object to be weighed to be discharged later may be placed on the rear side of the object to be weighed earlier, or the object to be weighed previously discharged. The next object to be weighed may be dropped in the meantime.

Further, the timing hopper opening / closing means may be configured to variably control the amount of positional deviation of the object to be weighed on the conveyor according to the weight of the object to be weighed.

For example, reference shift times ΔTr and ΔT
The deviation time ΔTa larger than r and the deviation time ΔTb smaller than ΔTr are set in advance, and the object to be weighed W to be discharged first.
The weight of i (the object to be weighed in the ith hopper counting from the farthest position from the gathering position) and the object Wj to be discharged next
The average value Wav of the weight of (the object to be weighed in the j-th hopper counting from the farthest position from the gathering position) is obtained.

When the average value Wav is larger than the predetermined weight range, the object Wj is discharged when [(j-i) .Tc-ΔTa] time has elapsed from the discharge timing of the object Wi. When the average value Wav is within the predetermined weight range, the object to be weighed Wj is discharged when [(j−i) · Tc−ΔTr] time has elapsed from the discharge timing of the object to be weighed Wi. When the average value Wav is smaller than the predetermined weight range, the object to be weighed Wj is discharged when [(j−i) · Tc−ΔTb] time has elapsed from the discharge timing of the object to be weighed Wi.

By doing so, as shown in FIG. 13A, when the weights of the objects to be weighed Wi and Wj are both large, the deviation of the falling position (ΔTa · V) also becomes large, and as shown in FIG. As shown in (b), when the weights of the objects to be weighed Wi and Wj are both small, the fall position shift (ΔTb · V)
As shown in FIG. 13C, when the weight of the object to be weighed Wi is large and the weight of the object to be weighed Wj is small, the fall position deviation (ΔTa · V) becomes medium.
It should be noted that both weights of the objects to be weighed Wi and Wj are opposite to those shown in (c) of FIG. 13 and the weights of the objects to be weighed Wi and Wj are both medium. The displacement of the position of the object (ΔTr · V) becomes medium.

Further, a positional deviation may be generated by an amount proportional to the average value Wav of the weight of the object Wi to be discharged first and the weight of the object Wj to be subsequently discharged. In this case, the reference weight is set to Wr (for example, the weight obtained by dividing the target weight of the combination by the number of combination hoppers), and the deviation time ΔT is calculated by the following formula ΔTr · (Wav / Wr), and the measured weight to be discharged first is calculated. Thing W
The position of i and the position of the object Wj to be discharged next are Δ
Make sure that they are shifted by T / V.

If there are a plurality of objects to be weighed which are significantly smaller in weight than the other objects to be weighed, the objects to be weighed having a smaller weight are placed at substantially the same position. You may make it gather in. For example, when the weights of the objects to be weighed Wj and Wk to be subsequently discharged are both smaller than the weight of the object to be weighed Wi discharged first, as shown in FIG. The object to be weighed Wj is discharged to a position shifted from the collecting chute by ΔTr · V, and the next object to be weighed Wk is discharged to almost the same position as the object to be weighed Wj.

Further, the objects to be weighed Wi and 3 to be discharged first are
When the weight of the second discharged object to be weighed Wk is large and the weight of the second and fourth discharged objects to be weighed Wj and Wm are both small, as shown in (b) of FIG. The object to be weighed Wj is discharged from the object Wi toward the collecting chute by ΔTr · V, and the object to be measured Wk is further discharged from the object Wj toward the collecting chute by ΔTr · V. Then, the object to be weighed Wm is discharged to almost the same position as the object to be weighed Wj.

As described above, among the objects to be weighed selected for the combination, the ones having a large weight become large and the ones having a small weight become small so that the deviation becomes small. By controlling, the height of the object to be weighed on the conveyor can be made uniform, and the range in which the object to be weighed falls can be minimized. When the object to be weighed on the conveyor is shifted as shown in FIGS. 12 to 14, the timing of accommodating the object to be weighed based on the weighing hopper discharge signal and the weight of the object to be weighed selected in the combination. It suffices to provide calculation means for calculating the respective discharge timings of the hoppers and activate the cylinder drive circuits 97a to 97j at the calculated discharge timings.

[0090]

As described above, the combination weighing device of the present invention is provided with a plurality of weighing hoppers arranged in a straight line in the lateral direction for receiving a plurality of objects to be weighed and selected as a combination. The timing hopper, the conveyor that carries the objects to be weighed discharged from each timing hopper to the collecting position, and the objects to be weighed that are selected for the combination and discharged to each timing hopper are collected on the conveyor from the weighing hopper. It has a timing hopper opening / closing means for opening and closing the timing hopper that receives the object to be weighed in the order farther from the collecting position, and the object to be weighed discharged later from the position on the conveyor of the object to be previously discharged. Each timing hopper is opened and closed so that the position on the conveyor shifts within a predetermined range.

Therefore, the discharge efficiency of each of the objects to be weighed is significantly improved in the state where a sufficient gap is secured between the objects to be weighed selected in the previous combination and the objects to be weighed selected in the next combination. It is also possible to reduce stains on the conveyor and adhesion of the objects to be weighed.

Further, the gap between the timing hopper and the conveyor is small, the time for dropping the objects to be weighed therebetween can be shortened, and the gap between the subsequent objects to be weighed can be reduced even on the conveyor having a narrow width. Therefore, it is possible to significantly improve the discharge efficiency of the tacky object to be weighed.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an appearance of an embodiment of the present invention.

FIG. 2 is a schematic front view of one embodiment.

FIG. 3 is a schematic side view of one embodiment.

FIG. 4 is an enlarged perspective view of a main part of one embodiment.

FIG. 5 is an enlarged perspective view of a main part of the embodiment.

FIG. 6 is an enlarged perspective view of a main part of one embodiment.

FIG. 7 is a block diagram showing a configuration of a control unit according to an embodiment.

8 is a block diagram showing a specific configuration of a main part of FIG.

FIG. 9 is a schematic diagram for explaining the operation of one embodiment.

FIG. 10 is a schematic diagram for explaining the operation of one embodiment.

FIG. 11 is a diagram showing opening / closing timings of the hopper of the embodiment.

FIG. 12 is a schematic diagram illustrating an operation according to another embodiment of the present invention.

FIG. 13 is a schematic diagram for explaining an operation according to another embodiment of the present invention.

FIG. 14 is a schematic diagram for explaining an operation according to another embodiment of the present invention.

FIG. 15 is a diagram for explaining a combination weighing device using a conveyor.

[Explanation of symbols]

 20 combination weighing device 25 pool hopper 35 weighing hopper 50 timing hopper 65, 66 conveyor 80 collecting chute 90 combination selecting means 91 weighing hopper opening / closing means 94 timing hopper opening / closing means

Claims (2)

[Claims] 1. An object to be weighed is supplied to and weighed by a plurality of cylindrical weighing hoppers arranged in a substantially straight line in the lateral direction, and a combination of objects to be weighed is selected based on the measured values. A combination weighing device for collecting the objects to be weighed selected in the combination at a predetermined collecting position, the plurality of objects being respectively disposed below the plurality of weighing hoppers and containing the objects to be weighed discharged from the weighing hoppers. A cylindrical timing hopper and a plurality of timing hoppers are arranged below the plurality of timing hoppers with their conveying directions aligned with each other in a direction in which the timing hoppers are arranged, and the objects to be weighed discharged from the plurality of timing hoppers are received. A conveyor for carrying out to the position side, and a timing hopper accommodating the objects to be weighed selected in the combination, among the plurality of timing hoppers, away from the gathering position. And a timing hopper opening / closing means for opening and closing in sequence and collecting the objects to be weighed selected in the combination on the conveyor, wherein the timing hopper opening / closing means is one of the objects to be weighed selected in the combination. A combination weighing device, wherein each timing hopper is opened and closed so that a position of a discharged object to be weighed on the conveyor is shifted within a predetermined range from a position of the discharged object to be measured on the conveyor. 2. The timing hopper opening / closing means, on the conveyor of the objects to be weighed discharged later than the position on the conveyor of the objects to be weighed first discharged among the objects to be weighed selected for the combination. 2. The combination weighing device according to claim 1, wherein each of the timing hoppers is opened and closed so that the position of is shifted toward the gathering position within a predetermined range.