JPH0875537A - Combination measuring device for rod-shaped products - Google Patents

Abstract

PURPOSE: To weigh rod-like goods accurately and efficiently while preventing breakage in the way of weighing. CONSTITUTION: Rod-like goods 1 are arranged in one direction at a supply section 2 and distributed, while sustaining the directivity as it is, in the downstream thereof before being dropped from a plurality of positions at a distributing section 3. The dropped goods 1 undergo combination weighing at a weighing section 5 comprising a pool conveyor, a weighing conveyor 39b and pool sections 45a, 45b. Selected rod-like goods 1 are discharged from the pool sections 45a, 45b onto a collection conveyor 46, collected at a collection hopper 48 and then carried out to the outside.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for automatically weighing stick-shaped products such as confectionery and dried noodles for each predetermined weight.

[0002]

2. Description of the Related Art After manufacturing rod-shaped products, before moving to a packing process, it is necessary to group the bar-shaped products into a predetermined weight. As a weighing device used for such an application, a so-called combination weighing device having a structure in which a weighing hopper and a pool hopper are arranged on the circumference and a plurality of these various hoppers are vertically stacked can be considered. The device is
Since the objects to be weighed are dropped multiple times stepwise to be weighed and collected, the rod-shaped products are likely to break during weighing.
It is not suitable for weighing rod-shaped products.

Under such circumstances, in the past, bar-shaped products are indirectly weighed not by weight management but by counting management.

[0004]

However, in the counting management, even if the bar-shaped product is broken or the shape varies, it is counted as a single piece, so that the product weight is likely to be excessive or deficient. Therefore, the defective product rate tends to increase.

Therefore, an object of the present invention is to provide a combination weighing device which can accurately and efficiently weigh stick-shaped products without causing them to break.

[0006]

[Means for Solving the Problems] To achieve the above object,
The device of the present invention is a supply unit for aligning and transporting rod-shaped products in one direction and a downstream side of the supply unit, and the rod-shaped products supplied from the supply unit are dispersed into a plurality of groups while maintaining their directionality. It consists of a dispersing section for dropping and dropping, a plurality of weighing conveyors for independently weighing the dropped bar-shaped products for each group, and a pool section provided on the downstream side of each weighing conveyor. After selecting the most suitable combination to obtain the weighing total value that is closest to the target value from, the weighing unit that opens the pool unit corresponding to the selected weighing value and discharges the bar-shaped product And a carry-out section for collecting the bar-shaped products and carrying them out of the machine.

At the downstream end of the supply unit, a pair of cord-shaped belts for supporting the aligned bar-shaped products in a bridged state may be arranged.

The dispersion unit is composed of a plurality of transport conveyors arranged in a line with a space between a start end portion and an end portion opposite to the start end portion, and a plurality of shutters for closing and opening the space between the transport conveyors. Configure.

Each of the conveyors may be arranged so as to be inclined such that its conveying surface is an inclined surface which is inclined upward on the downstream side in the conveying direction.

A circulation conveyor may be provided above the transport conveyor with its end portion positioned on the supply unit, and a lifter may be provided at the end portion of the transport conveyor row to collect excess rod-shaped products and supply them to the circulation conveyor. .

[0011]

The bar-shaped products reaching the supply section are aligned in one direction and supplied to the dispersion section. In the dispersion unit, the supplied rod-shaped products are dispersed in a plurality of groups while maintaining their directionality and dropped from a plurality of locations. The dropped bar-shaped products are weighed while being conveyed by a weighing conveyor for each group, and then stored in the pool section. As described above, when the weighing operation is performed on the conveyor, an unreasonable external force is not applied as compared with the case of using the hopper type weighing machine, and thus the bar-shaped product is less likely to be broken. Next, after selecting the optimum combination from the weighing values on each weighing conveyor to obtain the total value that is closest to the target value, the pool section corresponding to the selected weighing value is opened and the rod-shaped product is discharged. . The discharged bar-shaped products are collected at the carry-out section and then discharged outside the machine.

When a cord-shaped conveyor that supports aligned bar-shaped products in a bridged state is arranged at the downstream end of the supply unit, the bar-shaped products that have been broken and shortened do not fall on the string-shaped conveyor and fall from the gap. Therefore, only the bar-shaped products having the specified length without breaking are supplied to the dispersion section.

The dispersing section is composed of a plurality of transport conveyors in which a space is provided between a start end portion and an end portion opposed thereto and arranged in a line, and a plurality of shutters for closing and opening the space between the transport conveyors. With this configuration, the bar-shaped products supplied from the supply unit are transported to the downstream side by the transport conveyors in the aligned state. When the shutter is selectively opened, the space between the transfer conveyors is opened, and the bar-shaped product on the shutter drops through the space and is supplied to the weighing conveyor.

When the transport conveyors are arranged so as to be inclined such that the transport surface thereof is a slanting surface having a rising slope on the downstream side in the transport direction, in the adjacent transport conveyors, the end portions of the transport conveyors in the preceding stage and the transport conveyors in the subsequent stage are arranged. A proper drop is formed between the start end and the start end. Therefore, for some reason, the rod-shaped products supplied to the dispersion unit in a state of being tilted or overlapped with each other are corrected in inclination and overlap when being transferred to the transport conveyor in the subsequent stage. When the bar-shaped product slides down on the conveying surface, the inclination and the overlap are similarly corrected.

When a circulation conveyor having a terminal end located on the supply unit is provided above the transfer conveyor, and a lifter for collecting excess rod-shaped products and supplying the product to the circulation conveyor is provided at the end of the transfer conveyor row, The surplus rod-shaped products reaching the end of the conveyor row are collected by the lifter and then supplied on the circulation conveyor. The surplus rod-shaped products on the circulation conveyor are conveyed to the supply unit and then re-supplied to the dispersion unit.

[0016]

Embodiments of the present invention will be described below with reference to FIGS.

As shown in FIG. 1 (side view) and FIG. 2 (plan view), the device of the present invention has a supply unit (2) for aligning rod-shaped products (1) in one direction and this supply unit (2). Dispersing section (3), which is disposed on the downstream side of the distribution section, disperses the bar-shaped product (1) supplied from the supply section (2) while maintaining its directionality and drops from a plurality of locations, and the bar-shaped product after dispersion. It is composed of a weighing unit (5) for performing combined weighing while maintaining the directionality thereof, and a carry-out unit (6) for collectively carrying out the rod-shaped products discharged from the weighing unit (5) to the outside of the machine.

The structure of each component will be described in detail below.

The two supply parts (2) are provided on the left and right sides, and are provided with a carry-in conveyor (7) and a carry-in conveyor (7).
And a pair of left and right upstream side cord belts (10a) and a downstream side cord belt (10b) disposed at the end of the vibration feeder (9).

A pair of side walls (12) of the vibrating feeder (9)
Are erected so as to face each other so as to gradually narrow toward the downstream side, and the width of the downstream end thereof is slightly larger than the length of the bar-shaped product (1). The end portion of the upstream side cord belt (10a) and the start end portion of the downstream side cord belt (10b) are coaxially supported by the shaft member (13) and a pulley (not shown) attached to the shaft member (13). . An impeller (14) is attached to the shaft member (13). This impeller (14)
Rotates in synchronism with the upstream and downstream cord belts (10a) (10b) to smooth the delivery of the rod-shaped product (1) between the cord belts (10a) (10b).

The transmission members of the cord belts (10a) and (10b) are
As long as the transmission members are arranged apart from each other on the left and right, the shape and material thereof are arbitrary, and other than the string-like one, a chain, a flat belt or the like may be used.

The dispersion section (3) is arranged on the downstream side of each of the supply sections (2), and a plurality of, for example, six, arranged in series with a space provided between the start end and the end opposite thereto. The transport conveyors (16) and the shutters (17) (five in this embodiment) arranged in the space between the transport conveyors (16).

Each of the conveyors (16) has a start end and a trailing end of the conveyor (16) located upstream of the conveyor so that each conveyor surface (16a) rises and slopes on the downstream side in the conveyor direction. It is arranged so as to be an inclined surface. Therefore, when the transfer conveyor (16) is viewed from the side, the transfer surface (16a) is wavy (see FIG. 1). Each of the conveyors (16) is provided with two rows of conveyor belts (19, 19) as shown in the plan view of FIG.

As shown in the side view of FIG. 3, each shutter (17) is opened and closed by a drive cylinder (20) whose base end is swingably supported. This drive cylinder (20)
The front end of the intermediate link (21) is pivotally attached to one end of the intermediate link (21), and the other end of the intermediate link (21) is connected to each of the conveyors (1).
6) It is fixed to one of the rotating shafts, for example, the driven shaft (23). The shutter (17) can close the space between the transfer conveyors (16) in the entire width direction, and both sides thereof are extended to the downstream side and fixed to the driven shaft (23) of the transfer conveyor (16). ing. With this configuration, the drive cylinder (20)
The shutter (17) is driven by the driven shaft (23).
Is pivoted between the open position (indicated by a chain double-dashed line) and the closed position (indicated by a solid line), and the space between the transfer conveyors (16) is opened / closed.

A circulation conveyor (25) is arranged above the transfer conveyors (16) so that the transfer direction is parallel to the transfer direction of each transfer conveyor (16). This circulating conveyor (25)
Has its starting end positioned at the end of the row of conveyors (16) and its end at the downstream belt belt (10b).
Located on top.

As shown in FIGS. 3 and 4, a lifter (26) is arranged at the end of the transfer conveyor (16) row. The lifter (26) includes an ascending / descending cylinder (27), and an ascending / descending member (29) which is driven by the cylinder (27) to ascend and descend.
A swing shaft (30) inserted through the upper end of the elevating member (29), a swing member (31) whose center is rotatably supported by the swing shaft (30), and a swing member (31 ) Is attached to the collecting member (32) and the swinging member (3) located downstream of the swinging shaft (30).
1) and the elastic member (33) such as a coil spring interposed between the lower end of the elevating member (29) and one side of the swing member (31) outside the swing shaft (30). It is arranged between the wheel body (35) rotatably supported on the upstream side, the recovery member (32) and the most downstream transfer conveyor (16), and fixed to the recovery member (32) by a connecting member (not shown). And a guide plate (36).

When the transfer conveyor (16) is driven, the lifting cylinder (27) is retracted, and at this time, the recovery member (32) has the most downstream transfer conveyor (16) at the position shown by the solid line in the figure. ), The surplus rod-shaped product (1) is collected via the guide plate (36). Downstream conveyors (16)
When the cylinder stops, the cylinder (27) advances and the lifting member (2
9), swing shaft (30), swing member (31), recovery member (32)
And the guide plate (36) is integrally lifted. Collection member (3
When 2) reaches A in Fig. 3, the wheel body (35) moves to the machine casing (37:
The upward movement is restricted by an L-shaped contact member (38) fixed to (see FIG. 4). Thereafter, when the cylinder (27) is further advanced against the elastic force of the elastic member (33), the recovery member (32) tilts to the position B about the pivot axis of the wheel body (35), and the recovery member (32). The surplus rod-shaped product (1) in () slides down on the circulation conveyor (25) via the guide plate (36). The surplus rod-shaped product (1) thus supplied to the circulation conveyor (25) falls from the end of the circulation conveyor (25) and is placed on the cord belt (10b) on the downstream side.
Then, it is re-supplied to the dispersion unit (3). Cylinder (27)
When retracted, the recovery member (32) returns to the initial position by the elastic force of the elastic member (33) in the compression direction.

As shown in FIGS. 1 and 2, the weighing unit (5)
Are provided from below both dispersion portions (3) to the central portion. The weighing unit (5) includes pool conveyors (34a) (34b) arranged in the same number as the shutters (17) below both dispersion units (3), and each pool conveyor (34a) (34).
Weighing conveyors (39a) (39) connected to the end of b)
b) and a pool hopper (41) provided at the end of each weighing conveyor (39a) (39b). Pool conveyor (34a) (34b) and weighing conveyor (39) that make a pair
a) and (39b) are pool conveyors (34a) and (34b) except for the most downstream conveyor conveyors (16).
Is located below the terminal end of each of the transport conveyors (16) and is orthogonal to the transport direction of each transport conveyor (16).

Of the both side walls of each pool conveyor (34a) (34b), the downstream side wall (40) is positioned on the extension line of the shutter (17) which has reached the open position (shown by the chain double-dashed line). It is bent into a mountain shape (see Fig. 3). Therefore,
The bar-shaped product (1) dropped from each transfer conveyor (16) when the shutter (17) is opened slides on the upper surface of the shutter (17) and the slope of the side wall (40) and the pool conveyors (34a) (34).
b) Be guided exactly above.

The pool hopper (41) has a weighing conveyor (39
Only one half (a) (39b) (five in this embodiment) are arranged, and one pool hopper (41) is shared by two weighing conveyors (39a) (39b) located on the left and right sides of the pool hopper (41). As shown in FIG. 5, the pool hopper (41) is a double-opening type having a partition plate (42) in the center, and the bottom lids (44a) (44b) can be opened and closed independently. Of the pool parts (45a) and (45b) divided by the partition plate (42), the pool part (45a) on the upstream side is provided with the weighing conveyor (39a) located on the left side when viewed from the loading side of the bar-shaped products. The end portion is connected, and the end portion of the weighing conveyor (39b) located on the right side is connected to the pool portion (45b) on the downstream side.

As shown in FIGS. 1 and 2, the carry-out section (6)
Is composed of a recovery conveyor (46), a carry-out conveyor (47), and a collecting hopper (48) interposed between both conveyors (46) (47).

The recovery conveyor (46) is configured to be rotatable in the forward and reverse directions, and is disposed below each pool hopper (41) in parallel with the transfer direction of the transfer conveyor (16). The collection box (49) is arranged at the start end of the collection conveyor (46), that is, the end on the side of the supply unit (2), and the collection hopper (4) is arranged at the end.
8) is located. The start end of the carry-out conveyor (47) is arranged below the collecting hopper (48), and the end thereof is connected to a sorting device (52) described later.

The sorting device (52) is equipped with a carry-out conveyor (4
It is for sorting the bar-shaped products carried out from 7) in two directions, and is installed in consideration of workability in the packaging machine (53: horizontal pillow type in this embodiment).

This sorting device (52) includes a sorting hopper (54) arranged at the end of the carry-out conveyor (47) and a pair of guide grooves (parallel to each other) arranged in a direction orthogonal to the carry-out conveyor (47). 55a) (55b), a pair of pushing cylinders (56a) (56b) arranged in parallel with both guide grooves (55a) (55b) with the pushing directions opposite, and both guide grooves (55a) (55b) It is provided with a pair of timing hoppers (57a) (57b) provided at the terminal end. The sorting hopper (54) is a double-opening type, and has a structure in which one of the bottom lids can be opened and closed arbitrarily. Both timing hoppers (57a) and (57b) are connected to a supply port (not shown) of the packaging machine (53).

Of the two bottom lids of the sorting hopper (54), for example, when the bottom lid on the side of the supply unit (2) is opened, the bar-shaped products (1) housed inside the hopper are moved to the side of the supply unit (2). It is accommodated in the guide groove (55a) located. After that, when the pushing cylinder (56a) on the supply section (2) side is advanced to push the bar-shaped product in the guide groove (55a) into the timing hopper (57a) on the supply section (2) side, the bar-shaped product is packed. (Five
It is thrown into 3) and sealed in a pillow shape. On the other hand, similarly, when the other bottom lid is opened, the rod-shaped product is pressed by the other pushing cylinder (56b) in the opposite direction to the above-mentioned case, and the guide groove (55b) and the timing hopper (57b).
It is thrown into the packaging machine (53) via.

The distribution device (52) is installed corresponding to the packaging machine (53) having two supply ports, and when a packaging machine having only one supply port is used,
The distribution device (52) may be omitted. In this case, the terminal end of the carry-out conveyor (47) may be connected to the supply port of the packaging machine (53) via a suitable hopper.

The measuring procedure in the device of the present invention will be described below.

First, the carry-in conveyor (7) is driven to continuously feed the bar-shaped products vertically (parallel to the carrying direction of the introduction conveyor) onto the vibrating feeder (9). The bar-shaped products (1) reaching the end of the vibrating feeder (9) are aligned by a vibration in a direction orthogonal to the conveying direction (vertical direction on paper surface in FIG. 1: hereinafter referred to as reference direction), and then, It is supported in a bridged state by the cord belts (10a) and (10b). At this time, the bar-shaped product that is shorter than the specified dimension due to breakage or the like falls from the gap between the cord belts (10a) and (10b), and the recovery chute (below the cord belts (10a) and (10b)) (Not shown) is discharged to the outside of the machine.

Next, the bar-shaped product (1) is supplied to the transport conveyor (16) at the most upstream end. The rod-shaped products (1) supplied to the conveyor (16) slide down due to the inclination of the conveyor (16) and gather near the shutter (17). At this time, even if the bar-shaped product (1a) is tilted (see FIG. 4) or crosses and overlaps, the bar-shaped product (1)
When sliding down the transport surface (16a), its posture is corrected and aligned in the reference direction. When a certain number of bar-shaped products (1) are collected on the transfer conveyor (16), a part of them is transferred to the next-stage transfer conveyor (16), and thereafter, the bar-shaped products are sequentially transferred to the downstream transfer conveyor (16). (1) is transferred. Even when the bar-shaped product (1) is transferred to the next-stage transfer conveyor (16), the inclination and the overlapping of the bar-shaped product (1) are eliminated due to an appropriate drop formed between the conveyors (16) and (16). It

The surplus rod-shaped product (1) carried out from the last-stage transfer conveyor (16) is lifter (2) as described above.
It is recovered by the recovery member (32) of 6) and is circulated and supplied onto the cord belt (10b) on the downstream side via the circulation conveyor (25).

When the bar-shaped products have spread to all the transfer conveyors (16) after a predetermined time has passed, the shutters (17) are opened all at once and the bar-shaped products (1) on the transfer conveyors (16) are moved to the pool conveyor ( Drop onto 34a) and 34b). The bar-shaped product (1) that has dropped is the pool conveyor (34a) (34
b), then each weighing conveyor (39a)
(39b) is supplied on. Weighing conveyor (39a) (39
In b), the bar-shaped product (1) is weighed while being conveyed and the measured value is stored, and then the bar-shaped product (1) is supplied into each pool section (45a) (45b) of the pool hopper (41). To do.

Next, combination weighing is performed based on the weighing values on the weighing conveyors (39a) (39b). That is, the optimum combination is selected from the respective measured values to obtain the measured total value that is closest to the target value, and the bottom of the pool section (45a) (45b) containing the bar-shaped products corresponding to the selected measured value is selected. The lids (44a) and (44b) are opened and the bar-shaped products contained therein are discharged all at once. The discharged rod-shaped products are conveyed to the collecting hopper (48) by the collection conveyor (46), and this hopper (48)
It is put together in the inside.

When the measured value is not good, that is, when the target value cannot be obtained by combining any of the measured values, all the bottom lids of the pool hopper (41) are opened to collect all the rod-shaped products on the conveyor (46). ), And the collection conveyor (46) is rotated in the reverse direction to carry the product to the collection box (49). The bar-shaped products in the collection box (49) are returned to the carry-in conveyor (7) by a transfer means (conveyor, chute, etc.) not shown,
Re-supply to the vibrating feeder (9).

Pool section (45a) (45) that participated in the combination
When the bottom lids (44a) (44b) of b) are closed, new bar-shaped products are supplied to the pool sections (45a) (45b) from the corresponding weighing conveyors (39a) (39b). At the same time, the bar-shaped products pooled on the pool conveyors (34a) (34b) in advance are supplied to the weighing conveyors (39a) (39b). Then, the pool section not selected in the previous combination and the pool section containing the new bar-shaped product are combined, and the selected pool section (45a) (45b) is opened to collect the bar-shaped product conveyor ( 46) Dispose on top.

Hereinafter, the same procedure is repeated to selectively open the shutters (17) corresponding to the pool sections (45a) and (45b) that participated in the combination, and to release the shutters (17).
The pool conveyors (34a) (34b) and weighing conveyors (39a) (39b) corresponding to the above are intermittently activated, and new pool-shaped products are replenished to the pool portions (45a) (45b) at any time to perform combination weighing. .

It should be noted that all the transfer conveyors (16) may be driven at all times during the above work, but from the viewpoint of reducing the power consumption, each transfer conveyor (16) is connected to each shutter (1).
It is more desirable to configure so that it can be driven selectively according to the opening and closing of 7). That is, a plurality of open shutters (1
Among 7), the conveyor (16) located on the downstream side of the most downstream shutter (17) is stopped and the conveyor (16) on the upstream side is driven. For example, in FIG. 1, when the first, second, and fourth shutters (17) from the right are opened, the two conveyors located downstream of the fourth shutter (17) are stopped, Drive a conveyor other than.

The collecting hopper (48) containing the bar-shaped products is
After a certain time has elapsed (after all the rod-shaped products discharged on the collection conveyor are stored in the collecting hopper), the opened rod-shaped products are carried out to the carry-out conveyor (47). Next, the bar-shaped products are loaded into the sorting hopper (54), sorted in the two directions as described above, and alternately loaded into the two timing hoppers (57a) (57b), respectively by the packaging machine (53). Be packaged.

As described above, according to the present invention, it is possible to measure the rod-shaped products supplied from the supply unit (2) to a predetermined weight while maintaining the original direction, and to discharge the products collectively. Therefore, the packaging operation can be smoothly performed in the next step, for example, the packaging step. Also,
Since the weight management is performed, the weight accuracy of the product can be further improved as compared with the conventional case of counting management. Furthermore, like a conventional combination weighing device,
Unlike the one that weighs the objects while dropping them in multiple steps, the weighing conveyors (39a) (39b) convey the objects horizontally while weighing, so the bar-shaped product (1) may break during the weighing process. Without, the product quality can be improved. Even in the device of the present invention, there are several places where the rod-shaped product (1) falls, but at any of the places where the rod-shaped product falls, the rod-shaped product falls in a horizontal state and comes into surface contact with a mating member, which acts during a collision. There is little impact, so it is thought that stick-shaped products will not break easily.

FIG. 6 shows another embodiment of the present invention, in which the conveyors (16) are arranged not on the corrugated shape but on the same plane (a structure which performs the same function as the apparatus of FIG. 1). The same reference numerals are given to the elements, and the description thereof will be omitted).
In the drawings, the pool conveyors (34a) (34b) arranged below the shutter (17) and upstream of the weighing conveyors (39a) (39b) are not shown.

This device is particularly useful when the rod-shaped product rolls easily (when the cross section is circular). That is,
In the device shown in FIG. 1, since the transfer conveyor (16) is inclined, the bar-shaped products are transferred onto the transfer surface (16a) of the transfer conveyor (16).
The rod-shaped product may not be smoothly supplied to the downstream-side transport conveyor (16) as a result, but in the device of FIG. 6, since the transport conveyor is arranged horizontally, such a situation may occur. Nothing can happen.

In the apparatus shown in FIG. 6, two collecting conveyors (46) are connected in series, and a collecting hopper (48: horizontally slidable) is arranged between them. Similar to the device of No. 1, if the collecting conveyor (46) is integrated and the collecting hopper (48) is arranged at the end of the collecting conveyor (46),
This is because the recovery conveyor (46) becomes too long, which lengthens the recovery time of the rod-shaped products discharged from the pool hopper (41) and reduces the efficiency of the entire apparatus.

[0052]

As described above, according to the present invention, it is possible to weigh a rod-shaped product to a predetermined weight while maintaining the initial directionality and discharge the product collectively. Therefore, a predetermined work can be smoothly performed in the next step (packaging step, etc.). Further, since weight management is possible, the weight accuracy of the product can be further improved as compared with the conventional case of counting management. Furthermore, unlike the conventional combination weighing device that weighs objects while dropping them in multiple stages, it has a structure in which the weighing conveyor conveys horizontally while weighing, so that bar-shaped products The product quality can be improved without breaking.

If a string-shaped conveyor that supports aligned bar-shaped products in a bridged state is arranged at the downstream end of the supply unit, the broken and shortened bar-shaped products do not rest on the string-shaped conveyor and fall from the gap. . Therefore, it is possible to supply only the bar-shaped product having the specified length without breaking to the dispersion portion, and the variation in product size is suppressed.

The dispersing section is composed of a plurality of transport conveyors in which a space is provided between a start end portion and a terminating end portion which opposes the dispersion end portion, and a plurality of shutters which close and open the space between the transport conveyors. With this configuration, the bar-shaped product can be smoothly dropped from a plurality of locations. In combination weighing, it is necessary to replenish new rod-shaped products only in the pool section that accommodates the selected rod-shaped products, but this requirement can be easily met by selectively opening the shutter. Yes, stable combination weighing is possible.

By arranging each of the conveyors so that the conveyor surface is inclined so that the downstream side in the conveying direction is inclined upward, even if the bar-shaped products on the conveyor are inclined or overlapped with each other, this can be done quickly. Therefore, the weighing operation can be stably continued without interruption.

By providing a circulation conveyor having a terminal end located on the supply unit above the transfer conveyor, and a lifter for collecting excess rod-shaped products and supplying the same to the circulation conveyor at the terminal end of the transfer conveyor row, Excess rod-shaped products that reach the end of the conveyor line can be re-supplied to the dispersion unit.
Waste of raw materials is suppressed.

[Brief description of drawings]

FIG. 1 is a side view of a combination weighing device according to the present invention.

FIG. 2 is a plan view of a combination weighing device according to the present invention.

FIG. 3 is an enlarged side view of the vicinity of the terminal end of the conveyor row.

FIG. 4 is an enlarged plan view of the vicinity of the terminal end of the conveyor row.

FIG. 5 is an enlarged sectional view of a pool hopper.

FIG. 6 is a side view showing another embodiment of the present invention.

[Explanation of symbols]

 1 bar-shaped product 2 supply section 3 dispersion section 5 weighing section 6 unloading section 10a ・ 10b string belt 16 transfer conveyor 16a transfer surface 17 shutter 25 circulation conveyor 26 lifter 39a ・ 39b weighing conveyor 45a ・ 45b pool section

Claims (5)

[Claims] 1. A supply unit for arranging and transporting rod-shaped products in one direction, and a supply unit arranged downstream of the supply unit for dispersing the rod-shaped products into a plurality of groups while maintaining the directionality thereof. It consists of a dispersing section for dropping and dropping, a plurality of weighing conveyors for independently weighing the dropped bar-shaped products for each group, and a pool section provided on the downstream side of each weighing conveyor. After selecting the most suitable combination to obtain the weighing total value that is closest to the target value from, the weighing unit that opens the pool unit corresponding to the selected weighing value and discharges the bar-shaped product And a carry-out section for collecting the bar-shaped products and then carrying them out of the machine. 2. The combination weighing device for rod-shaped products according to claim 1, wherein a pair of cord-shaped belts for supporting the aligned rod-shaped products in a bridged state are arranged at the downstream end of the supply unit. 3. A plurality of transport conveyors, wherein the dispersing section has a space between a start end portion and a terminating end portion opposite to the start end portion, and the transport conveyors are arranged in a line, and a plurality of transport conveyors that close or open a space between the transport conveyors. The combination weighing device for stick-shaped products according to claim 1, wherein the combination weighing device comprises a shutter. 4. The combination weighing device for a bar-shaped product according to claim 3, wherein each of the conveyors is arranged so as to be inclined such that a conveying surface thereof is an inclined surface which is inclined upward on the downstream side in the conveying direction. 5. A circulation conveyor having an end portion located above a supply portion is provided above the transfer conveyor, and a lifter for collecting excess rod-shaped products and supplying the same to the circulation conveyor is provided at the end portion of the transfer conveyor row. The combination weighing device for stick-shaped products according to claim 3, wherein