JP4494383B2 - Combination weighing device - Google Patents

Description

  The present invention relates to a combination weighing device that measures and combines and discharges objects to be weighed to a predetermined amount in order to package objects to be weighed such as food by a predetermined amount.

  In general, a combination weighing device is configured to select a combination within a target weight range from combinations of objects to be weighed by a plurality of weighing units, and collect and discharge the selected objects to be weighed. .

Conventional combination weighing devices are roughly classified into two types, a circular type and a rectangular type.
Among these, the rectangular type combination weighing device has a plurality of hoppers arranged vertically in a vertical direction below a supply trough for supplying an object to be weighed, and each channel is arranged in parallel in a straight line. Is.

  Further, in Patent Document 1 below, a channel composed of a supply trough and a plurality of hoppers is arranged in a straight line below a substantially rectangular cylindrical tank for storing objects to be weighed. A combination weighing device (rectangular type) is disclosed in which rear end portions in the supply direction of objects are arranged back to back. In such a combination weighing device, the rear end portion of the supply trough extends to the inside of the tank, and the supply trough vibrates so that an object to be weighed in the tank is advanced from the rear end portion (upstream side) of the supply trough. Part (downstream side).

In addition, in the combination weighing device in which the channel rows as described above are arranged back to back, a dispersion partition is provided in the tank in order to disperse the objects to be weighed in the tank substantially uniformly in each channel row. There is. As shown in FIG. 6, the dispersion partition 101 extends substantially in the center of the tank 102 in the arrangement direction (not shown) of the supply troughs 103 and has a substantially inverted V-shaped cross section inclined downward in the supply direction Y of the supply troughs 103. The both ends in the longitudinal direction are fixed to the inner wall surface 102b facing the tank arrangement direction.
JP 2004-109078 A

However, in the conventional rectangular type combination weighing device as described above, so-called bridges are generated in which the objects to be weighed interfere with each other in the tank, and the objects to be weighed stagnate in the tank. As a result, the stable supply of objects to be weighed may be hindered. As described above, the supply trough is configured to vibrate and can be used to break the bridge. However, in addition to the vibration direction being an oblique direction (or a lateral direction), even a minute vibration can be used. Therefore, it was not possible to completely eliminate the bridge.
In particular, since the distribution partition 101 is provided in the tank 102, as shown in FIG. 6, a bridge B is easily generated between the inclined surface 101a of the distribution partition 101 and the tank inner wall surface 102a. In the past, it was difficult to break the bridge B.

  Therefore, the present invention has been made in view of the above situation, and can effectively break a bridge generated in a tank of a combination weighing device (rectangular type) in which channels arranged in parallel are arranged back to back. An object of the present invention is to provide a combination weighing device that prevents the objects to be weighed from staying inside and stably supplies the objects to be weighed to each channel.

Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments.
The combination weighing apparatus according to claim 1 of the present invention includes two pairs of opposing surfaces, has a substantially rectangular cylindrical shape opened up and down, stores the objects to be weighed from the upper opening 3a , and discharges it from the lower opening 3b. It has tanks 2,
A channel is constituted by a supply trough 10 for supplying the objects to be weighed discharged from the tank 2 and a plurality of hoppers arranged in a vertical direction below the front end portion 10b of the supply trough 10,
Below the lower opening 3b of the tank 2, a plurality of the channels are arranged in parallel, and the rear end portion 10a of the supply direction Y of the weighing object in the supply trough 10 of each of the plurality of channels is back to back. In the arranged combination weighing device 1,
In the lower part of the tank 2 and in the central part of the supply direction Y, the side plates 6 and 6 that extend in the arrangement direction X of the supply troughs 10 and whose both ends form a pair of opposed surfaces of the two pairs of opposed surfaces Dispersing portions 20 are provided so as to be able to vibrate up and down while being folded outwardly and having surfaces 21 and 21 inclined downward toward the supply directions Y1 and Y2 of the supply troughs 10 arranged back to back. It is characterized by being.

The combination weighing device according to claim 2 is the combination weighing device according to claim 1, wherein the outermost plate 12 of the supply trough 10A located on the outermost side in the arrangement direction X in the channels arranged in parallel is the It is characterized in that it is arranged on the outer side of the folded portion 22 of the dispersing portion 20 .

The combination weighing device according to claim 3 is the combination weighing device 1 according to claim 1 or 2 , wherein the other surface of the two pairs of opposed surfaces is discharged from the lower opening 3b. An opening adjusting shutter 4 for adjusting the discharge amount of the object is provided .

  According to the combination weighing device according to the present invention, the dispersing portions provided in the tank extend in the arrangement direction of the supply troughs and are inclined downward in the respective supply directions of the objects to be weighed, so that they are arranged back to back. The objects to be weighed can be distributed almost evenly in each channel. Further, the fact that the dispersing portion has an inclined surface inclined in the supply direction also has an effect of suppressing the occurrence of a bridge between the inclined surface and the tank inner wall surface. Furthermore, since the dispersion part vibrates up and down, the bridge of the object to be weighed generated in the tank can be broken. Alternatively, it is possible to prevent the bridge from occurring in the tank. In addition, even if the dispersion part vibrates, the object to be weighed is not compressed, so that it is possible to vibrate the dispersion part greatly without damaging the object to be weighed. As a result, the bridge can be effectively broken. become. Thereby, it is possible to prevent the object to be weighed from staying in the tank, and each supply trough can stably supply the object to be measured to each channel.

In addition, the folded portions provided at both ends of the dispersing portion are arranged on the outer sides of the pair of side plates facing the arrangement direction of the supply trough among the side plates of the tank, thereby An object to be weighed can be prevented from dropping from a gap with the inner wall surface of the tank. Further, for example, when the object to be weighed is a snack confectionery or the like, it is possible to prevent the scraps and powders from falling from the gaps between both ends of the dispersing portion and the inner wall surface of the tank, thereby reducing the burden of cleaning work.

Further, by arranging the outermost plates of the outermost supply troughs of the supply troughs arranged in parallel further on the outer side of the folded portion of the dispersion part, both ends of the dispersion part and the inner wall surface of the tank Even if the object to be weighed falls through the gap, the object to be weighed can be received by the outermost supply trough. That is, it becomes possible to more reliably prevent the object to be weighed from dropping.

Embodiments of the present invention will be specifically described below with reference to the drawings.
1 is a front view showing an embodiment of a combination weighing device according to the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a side view thereof, FIG. 4 is an enlarged view of a portion A in FIG. It is a front view which shows only a vibration mechanism.

  As shown in FIG. 1, the combination weighing device 1 according to the present embodiment includes a tank 2, a supply trough 10 disposed below the tank 2, and a line arranged substantially vertically below the supply trough 10. And a plurality of hoppers, and a supply trough 10 and a plurality of hoppers arranged in the vertical direction to form a channel.

  As shown in FIGS. 1 and 3, the tank 2 is formed in a substantially rectangular cylinder shape that is opened up and down, and accumulates an object to be weighed (for example, a snack confectionery) introduced from the upper opening 3 a in the cylinder. Further, the lower opening 3b of the tank 2 is located on a rear end portion 10a of each supply trough 10 described later. Furthermore, opening adjustment shutters 4 and 4 are provided on the front and back surfaces (left and right surfaces in FIG. 3) of the tank 2. The opening adjustment shutter 4 is configured to be slidable up and down, and is provided with two guide holes 5 and 5 that are long in the vertical direction, and restricts the sliding movement of the shutter 4. Further, by sliding the opening adjustment shutter 4, the lower opening 3b of the tank 2 is expanded or narrowed, and the discharge amount of the object to be weighed can be adjusted.

  As shown in FIGS. 1 to 3, the supply trough 10 vibrates to send an object to be measured downstream (left and right sides in FIG. 3), and upstream rear end portions 10 a are arranged back to back. As shown in FIG. 2, the supply troughs 10 are arranged in a plurality of pairs (four pairs in the present embodiment) in the X direction, with the downstream end portion 10b facing outward. That is, four supply troughs 10 arranged in a straight line (arranged in parallel) are arranged back-to-back in two lines. The number of supply troughs 10 in one row is not limited to this.

  The supply trough 10 has a rear end portion 10 a inserted into the tank 2 through the lower opening 3 b of the tank 2. Therefore, when the supply trough 10 vibrates, the object to be weighed in the tank 2 is supplied to the hopper disposed below via the supply trough 10.

  Further, a gap is formed between adjacent supply troughs 10 so that the supply troughs 10 do not interfere with each other during vibration. The gap is closed by providing an overlap portion 11 in which a side portion of one supply trough 10 is overlapped with a side portion of the other supply trough 10. Each of the supply troughs 10 is disposed with a predetermined gap therebetween, and the object to be weighed may fall from the gap. In the present embodiment, the gap is covered by the overlap portion 11, and the object to be weighed can be prevented from dropping from the gap between the supply troughs 10.

A plurality of hoppers are arranged in a substantially vertical direction below the supply trough 10. Although not shown, each hopper has a supply port at the top and a discharge port at the bottom, and discharges the object to be weighed supplied from the supply port from the discharge port. An opening / closing shutter is provided at the discharge port.
In the present embodiment, a stock hopper, a weighing hopper, and a memory hopper are provided in one channel from the top.

The stock hopper is disposed below the front end portion 10b of the supply trough 10, stores the objects to be weighed supplied from the supply trough 10 by a predetermined amount, and discharges them to the weighing hopper. In addition, each supply trough 10 will newly supply a to-be-measured object, if the to-be-measured object of a stock hopper runs out for every channel.
The weighing hopper is arranged below the discharge port of the stock hopper, and the objects to be weighed supplied from the stock hopper are respectively weighed by a measuring instrument. Then, after weighing, it is discharged to the memory hopper.
The memory hopper is disposed below the discharge port of the weighing hopper, temporarily stores the objects to be weighed supplied from the weighing hopper, and discharges them to a collecting chute (not shown) after selecting the combination.

Note that the weighing signal of the weighing instrument is input to a combination selection unit (not shown). The combination selection means stores the weight of the object to be weighed supplied to the weighing hopper based on the weighing signal of the weighing instrument.
For example, when a discharge request signal is received from a packaging line or the like, a combination within the target weight range is selected from the combinations of the weights of the objects to be weighed by the weighing hopper, and the objects to be weighed selected in the combination are selected. A setting signal corresponding to the weighing hopper and / or the memory hopper accommodated therein is output. As a result, the objects to be weighed combined with the weight within the target weight range are collected by the collecting chute and discharged to the packaging line.

Hereinafter, the dispersion part which is the gist of the present invention and the vibration mechanism of the dispersion part will be described.
As shown in FIGS. 1 and 2, in the lower portion in the tank 2, the supply troughs 10 extend in the arrangement direction X, and each supply direction Y (Y1, Y2) of the objects to be weighed in the supply troughs 10 (see FIG. 3). A dispersion portion 20 having a surface 21 that gently slopes downward toward the top is provided at the upper portion of the rear end portion 10 a of the supply trough 10.

Further, both ends in the longitudinal direction of the dispersing section 20 (arranging direction X), as a parallel plane with respect to the pair of side plates 6,6 facing the arrangement direction X of the feed trough out of the side plate of the tank 2 Folded (folded portions 22, 22) . As shown in FIG. 4, the folded portion 22 is located outside the side plate 6 of the tank 2. That is, the main body of the dispersion unit 20 is disposed in the tank 2, but only the folded portions 22 at both ends are disposed outside the side plate 6 of the tank 2.

  As shown in FIGS. 3 and 5, two shafts 31, 31 project vertically downward from the dispersing portion 20. One end of the shaft 31 is fixed to the main body of the dispersion unit 20 with a bolt 32, and the other end is fixed to a long central frame 33 along the alignment direction X. The center frame 33 is provided with a vibrator 34 serving as a vibration source. Furthermore, connection frames 35, 35 whose longitudinal direction faces the supply direction Y are provided at both ends in the arrangement direction X of the central frame 34. A plurality of (two) support frames 36, 36 formed by bending the plate material in a substantially U shape are provided below the connection frame 35, and the center frame 33 and the connection frames 35, 35 are provided with a plurality of (one The support frames 36 and 36 are connected to the support frames 36 and 36 via two springs 37.

  According to the vibration mechanism 30, the dispersion unit 20 can be vibrated up and down by driving the vibrator 34. Further, the central frame 33 provided with the vibrator 34 is connected to the support frame 36 via the spring 37, thereby preventing the vibration caused by the vibrator 34 from affecting the main body base 7 of the weighing device 1.

Furthermore, as shown in FIG. 4, the outermost plates 12, 12 that are the outermost side plates of the supply troughs 10 </ b> A, 10 </ b> A located on the outermost side in the arrangement direction X among the supply troughs 10 arranged in parallel, It is arranged further outside the folded portions 22, 22 of the dispersion part 20.

  In the above-described embodiment, the dispersion unit 20 is configured to be able to vibrate independently by the vibration mechanism. However, for example, the dispersion unit 20 can be synchronized with the vibration of the supply trough 10. The bridge can be broken down more effectively.

1 is a front view showing an embodiment of a combination weighing device according to the present invention. It is the same plane. It is the same side view. It is an enlarged view of the A section in FIG. It is a front view which shows only a dispersion | distribution part and the vibration mechanism of this dispersion | distribution part. It is a side view of the conventional combination weighing device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Combination measuring device 2 ... Tank 3a ... Upper opening 6 ... Side plate 10 ... Supply trough 10A ... Outermost supply trough 10a ... Rear end part 10b ... Front end part 12 ... Outermost side plate 20 ... Dispersion part 22 ... Folding part X ... (Arrangement of supply trough) Y (Y1, Y2) ... Supply direction (of weighing object)

Claims (3)

A tank (2) that includes two pairs of opposing surfaces, has a substantially rectangular cylindrical shape that opens up and down, stores the objects to be weighed in from the upper opening (3a) , and discharges it from the lower opening (3b) ;
A channel is constituted by a supply trough (10) for supplying the object to be weighed discharged from the tank and a plurality of hoppers arranged in a substantially vertical direction below the front end (10b) of the supply trough. And
Below the lower opening of the tank, a plurality of the channels are arranged in parallel, and a rear end portion (10a) of the supply direction (Y) of the weighing object in the supply trough of each of the plurality of channels is back to back. In the combination weighing device (1) arranged in
Side plates (6, 6) at the lower part in the tank and extending in the supply direction (X) of the supply troughs at the central part in the supply direction, with both ends forming a pair of opposed surfaces of the two pairs of opposed surfaces And a dispersion part (20) having surfaces (21, 21) inclined downward toward the supply directions (Y1, Y2) of the supply troughs arranged back-to-back. A combination weighing device provided so as to be capable of vibrating. The outermost plate (12) of the supply trough (10A) located on the outermost side in the arrangement direction (X) in the channels arranged in parallel is further provided on the folded portion (22) of the dispersing portion (20). 2. The combination weighing device according to claim 1, wherein the combination weighing device is arranged outside . An opening adjustment shutter (4) for adjusting the discharge amount of the object to be discharged discharged from the lower opening (3b) is provided on the other pair of facing surfaces of the two pairs of facing surfaces. The combination weighing device according to claim 1 or 2 .

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