JP2003214933A - Weighing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent clogging of articles and enable stable weighing. <P>SOLUTION: A transport plate 30 is supported on a detector 40 for detecting mass of an article, receives on one end side thereof the article W transported from the other end side of an entrance conveyer 22 and slides the article to the other end side. An inclined guide portion 34 is formed on the one end side of the transport plate 30. The inclined guide portion is inclined to lower according as approaching the other end side of the entrance conveyer 22, and guides onto the transport plate 30 a leading end of the article W apt to go into a gap between the other end side of the entrance conveyer 22 and the one end side of the transport plate 30. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for smoothly weighing a pouch packaged product in a weighing device that weighs an article while conveying it.

[0002]

2. Description of the Related Art In a production line for foods or the like, a weighing device is used for inspecting manufactured products. As a weighing device used for such a purpose, the articles carried out from the conveyor of the manufacturing line, received at one end side of the weighing conveyor and conveyed to the other end side, during which the load of the articles on the weighing conveyor is It is detected by a measuring instrument, and based on the signal from the measuring instrument, it is checked whether foreign matter is mixed or whether the internal capacity is excessive or insufficient.

However, in the case of inspecting a small bag packaged product in which one or several small items such as candy are packed in a bag, since the mass of each inspected item is small, the weighing conveyor as described above. If the inspection is performed using, the accurate measurement cannot be performed due to the influence of the vibration component of the measuring conveyor itself.

In order to solve this, as shown in FIG. 7, the article W carried out from the run-up conveyor 1 is received by the horizontal carrier plate 5 and slid on the carrier plate 5, and the article W is slid during the gliding. A device for detecting the mass with the detector 7 has been proposed.

It should be noted that one end side of the carrier plate 5 has a taper portion 6 extending so as to overlap the roller 2 on the carry-out side of the run-up conveyor 1, and by this taper portion 6,
The articles are smoothly transferred from the run-up conveyor 1 to the carrier plate 5.

[0006]

However, in the case where the taper portion 6 that overlaps with one end side of the transport plate 5 is formed as in the above-described weighing device, the taper with the belt 3 that moves along the outer circumference of the roller 2 is formed. A gap is formed between the lower surface of the portion 6 and the conveyance plate 5 along the carrying-in direction of the article W.

Therefore, for example, as shown in FIG.
When an article W'having a bent tip at the bottom is carried in, as shown in FIG. 8B, the tip of the bag of the article W'enters the gap G and is clogged. This article also collides with this article W'and is not smoothly carried in on the carrier plate 5, and there is a problem that the weighing efficiency is significantly reduced.

It is an object of the present invention to solve this problem and to provide a weighing device which can eliminate clogging of articles and can perform stable weighing.

[0009]

In order to achieve the above-mentioned object, the weighing device according to claim 1 of the present invention conveys articles to be weighed from one end side to the other end side along a substantially horizontal conveying surface. The run-up conveyor (22) is arranged in such a state that the height of the upper surface of the run-up conveyor (22) is substantially flat and the height of the transport surface on the other end side of the run-up conveyor is substantially the same, and one end side is close to the other end side of the runner. Conveying plates (30, 30 ') that slide the articles carried out from the other end of the conveyor and carry them out from the other end, and the carrier plates that support the carrying plates and carry the articles carried out from the other end of the run-up conveyor. In a weighing device having a detector (40) for detecting the mass of an article sliding on a plate, the height is lowered toward the one end side of the carrier plate so that the height becomes lower toward the other end side of the running conveyor. Then, between the other end of the running conveyor and the carrier plate Inclined guide portion for guiding the distal end portion of the article that is about to enter the gap between the end-side onto the carrier plate (3
4, 34 ') are formed.

Further, a weighing device according to a second aspect of the present invention is the weighing device according to the first aspect, wherein a plurality of grooves (36) extending from the one end side to the other end side are weighed on the upper surface of the carrier plate. It is characterized by being formed at intervals smaller than the width of the target article.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show the configuration of a weight sorter 20 including a weighing device to which the present invention is applied.

As shown in FIG. 1, the weight sorter 20 has a base 21, and one end of the base 21 (see FIG. 1).
At the left end side), the run-up conveyor 22 is arranged.

The run-up conveyor 22 includes a support frame 23.
And a transport unit 24 detachably supported by the support frame 23.

The support frame 23 is composed of a base portion 23a whose lower end is fixed to the base 21 and a pair of support side plates 23b and 23c which are orthogonal to the upper surface of the base 21 at the upper portion of the base 23a and face each other in parallel. Has been done. A drive motor (not shown) is attached to one of the support side plates 23b and 23c.

The transport section 24 includes a pair of support side plates 23b and 2b.
It is supported so as to be sandwiched between 3c.

The transport section 24 is a pair of side plates 24a integrated by a connecting member (not shown) so as to face each other in parallel.
24b and one end side of both side plates 24a, 24b (see FIGS. 1 and 2).
The loading-side roller 25 whose both ends are supported by the left side), the loading-side roller 26 whose both ends are supported by the other ends (the right ends in FIGS. 1 and 2) of the side plates 24a and 24b, and the loading-side rollers. Two
The intermediate roller 27 is supported at both ends below the roller 6, and the endless conveyor belt 28 is wound around the rollers 25 to 27 so as to be circumscribed.

The diameter of the carry-out side roller 26 is set to be significantly smaller (about several mm) than the diameter of the carry-in side roller 25 and the intermediate roller 27 (about several cm). Further, the carry-in side roller 25 is rotationally driven by a drive motor on the side of the support frame 24.

On one end side (carry-in side roller side) of the run-up conveyor 22 formed in this way, articles packaged in small bags from a packaging machine (not shown) have a predetermined interval (conveying plate 30 to be described later).
Is carried in at an interval larger than the length obtained by adding the length of the article to the other end (carry-out side roller side) at a constant speed.

The articles carried out from the other end side of the run-up conveyor 22 are carried in on the carrier plate 30. As shown in FIG. 4, the carrier plate 30 includes a substantially rectangular substrate 31 and a substrate 31.
And side plates 32 and 33 extending downward from both sides of the board 31 and the other end of the runner conveyor 22 inclining so that the height decreases in an arc shape from one end of the board 31 on the runner conveyor 22 side toward the runner conveyor 22. Side and the one end side of the transport plate 30, the inclined guide portion 34 that guides the tip of the article that is about to enter into the gap on the substrate 30, and the front plate 35 that extends downward so as to be continuous with the inclined guide portion 34. Have

Further, on the surface of the substrate 31, a V-shaped groove (which may be U-shaped, rectangular, arc-shaped, etc.) extending from the inclined guide portion 34 on one end side to the other end side is provided in parallel. Has been. These grooves 36 reduce the area of contact between the articles to be weighed and the upper surface of the transport plate 30 to allow the articles carried out from the run-up conveyor 22 to pass through without slowing down and to skid during the transfer of the articles. And the like, and is formed at intervals (for example, 3 mm or less) sufficiently shorter than the width of the article.

Also, the side plates 32 and 33 have the carrier plate 3
A hole 37 for supporting 0 is provided.

The carrying plate 30 has a carrying surface formed by the surface of the carrying belt 28 that moves horizontally from one end side to the other end side of the run-up conveyor 22 and the upper surface of the substrate 31 are substantially level with each other. The front surface of the front plate 35 is arranged in a substantially horizontal state so as to be close to (for example, a gap of about 2 mm) the surface of the conveyor belt 28 that moves downward along the outer circumference of the carry-out side roller 26 of the running conveyor 22.

Below the carrier plate 30, a detector 40 for supporting the carrier plate 30 from below and detecting the mass of an article passing on the carrier plate 30 is arranged.

The detector 40 is fixed to the other end side of the base 21 and has a load sensor (not shown) inside, and a load transmitting portion 41a for transmitting a load to the load sensor is projected upward. And a support body 42, the lower portion of which is connected to the load transmission portion 41a of the detector body 41 and the upper portion of which is fixed to the holes 37 of the side plates 32 and 33 of the transport plate 30 via bolts 39. Has been done.

The detector 40 thus constructed outputs a signal corresponding to the mass of the article carried into the carrier plate 30 from the run-up conveyor 22 and sliding on the carrier plate 30.

On the carry-out side of the run-up conveyor 22, light is allowed to pass through from above to a gap with one end of the carrier plate 30, and the light reflected by the article (packaging) passing over this gap is received. A carry-in sensor 45 for detecting the carry-in timing to the carrier plate 30 is provided.

The articles that have passed over the carrier plate 30 are carried into the sorting conveyor 50. The sorting conveyor 50 is the transport plate 3
It is formed substantially symmetrically (with different lengths) with the run-up conveyor 22 with 0 interposed therebetween.

That is, the sorting conveyor 50 is composed of a supporting frame 51 and a carrying section 52 detachably supported by the supporting frame 51.

The support frame 51 has an L-shaped base 51a fixed to the base 21, and the base 21a above the base 51a.
Is formed by a pair of supporting side plates 51b and 51c that are orthogonal to the upper surface of and are opposed to each other in parallel. A drive motor (not shown) is attached to one of the support side plates 51b and 51c.

The transport section 52 includes a pair of support side plates 51b and 5b.
It is supported so as to be sandwiched between 1c.

The carrying section 52 is a pair of side plates 52a which are integrated by a connecting body (not shown) so as to face each other in parallel.
52b and one end sides of both side plates 52a and 52b (see FIGS. 1 and 2).
The loading-side roller 53 whose both ends are supported by the left side), the loading-side roller 54 whose both ends are supported by the other ends of the side plates 52a and 52b (the right ends in FIGS. 1 and 2), and the loading-side roller 5
3, an intermediate roller 55 whose both ends are supported below the roller 3, and an endless conveyor belt 56 which is wound around these rollers 53 to 55 so as to be circumscribed.

The diameter of the carry-in roller 53 is set to be significantly smaller (about several mm) than the diameter of the carry-out roller 54 and the intermediate roller 55 (about several cm). Further, the carry-out side roller 54 is rotationally driven by the drive motor of the support frame 51.

Further, the conveyor plate 3 is provided on the sorting conveyor 50.
An excluding device 57 for excluding defective items among the items that have passed 0 is provided. As the excluding device 57, for example, air is blown to a defective product to select the conveyor 50.
The one with the structure to be excluded to the side of is used.

The excluding device 57 excludes articles based on a signal from a signal processing unit (not shown). The signal processing unit determines the mass of the article carried on the carrier plate 30 based on the output signal of the detector 40 when a predetermined time has elapsed since the carry-in sensor 45 detected that the article was carried into the carrier 30. It is determined whether or not the obtained mass is within a preset allowable range, and a defective product determined not to be within the allowable range can pass through the transport plate 30 and be excluded on the sorting conveyor 50. The rejection request signal is output at the timing when the defective position is reached, and the defective product is rejected.

In the weight sorter 20 constructed as described above, as described above, the one end side of the transport plate 30 and the carry-out side of the run-up conveyor 22 do not overlap each other, and the transport plate 30 does not overlap.
An inclined guide portion 34 is provided so that the height becomes lower as it gets closer to the run-up conveyor 22 from one end side.

Therefore, as shown in FIG. 5 (a), for example, the sagging packaged article W is inclined so that the leading end side of the sachet is in contact with the surface of the conveyor belt 28, and the run-up conveyor 22 is provided. 5 (b), even when it reaches the unloading side of
As shown in FIG. 7, the tip of the bag of the article W is guided by the inclined guide portion 34 of the carrier plate 30, so that the tip may enter the gap G between the run-up conveyor 22 and the one end side of the carrier plate 30 to be clogged. Without the carrier plate 3 smoothly as shown in FIG.
0, slides on the carrier plate 30, is carried out to the sorting conveyor 50, and is sorted based on the mass detected while sliding on the carrier plate 30.

Further, since a plurality of grooves 36 are provided on the upper surface of the carrier plate 30 from one end side to the other end side along the carrying-in direction of the article at intervals shorter than the width of the article, the carrier plate 30 is Since the contact area between the article carried in and the carrier plate 30 is small and the frictional resistance is small, the speed of the article passing on the carrier plate 30 is substantially constant, and a measurement error due to speed fluctuation does not occur.

Further, since the groove 36 shows a small frictional force in the force in the direction parallel to the groove 36 and a large frictional force in the force in the direction not parallel to the groove 36, for example, it is conveyed from the run-up conveyor 22. Even when a force other than the direction parallel to the groove 36 is generated on the article when the article is transferred to the plate 30, the deviation in the sliding direction due to the force can be restricted, and the article can always be slid in the direction parallel to the groove 36.

In the above embodiment, the carrier plate 30 is used.
Although the present invention is applied to the weight sorter 20 that sorts the articles passing therethrough on the sorting conveyor 50, the present invention can also be applied to a weighing device that does not include the sorting conveyor 50.

Further, the carrier plate 30 of this embodiment has the inclined guide portion 34 inclined in an arc shape, but this does not limit the present invention, and for example, the carrier plate 30 'shown in FIG. As described above, a slant guide portion 34 'that reclines linearly may be provided.

[0041]

As described above, the weighing device of the present invention has one end side of the carrier plate for receiving the article carried out from the other end side of the run-up conveyor at one end side and sliding it to the other end side.
Guides the tip of the article that is about to enter the gap between the other end of the runner conveyor and the one end of the carrier plate onto the carrier plate by inclining so that the height becomes lower as it approaches the other end of the runner conveyor. An inclined guide portion is formed.

Therefore, even when a small bag package is weighed, the end of the bag does not enter the gap between the other end side of the run-up conveyor and the one end side of the carrier plate, and the article is not clogged. Weighing is possible.

When a plurality of grooves extending from one end side to the other end side are formed on the upper surface of the carrier plate at intervals smaller than the width of the article to be weighed, the contact area between the article and the carrier plate is small. Therefore, the speed of the article sliding on the carrier can be made substantially constant, and a measurement error due to speed fluctuation does not occur. Further, the sliding direction of the article can be made uniform by the groove, and the deviation of the sliding direction of the article due to the force received when the article is transferred onto the transport plate can be regulated.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of the present invention.

FIG. 2 is a plan view of an embodiment of the present invention.

FIG. 3 is an enlarged side view of a main part of the embodiment of the present invention.

FIG. 4 is a perspective view of a main part of the embodiment of the present invention.

FIG. 5 is an operation explanatory diagram of the embodiment of the present invention.

FIG. 6 is a perspective view showing a modified example of the main part.

FIG. 7 is a schematic side view of a conventional device.

FIG. 8 is an enlarged side view of a main part of a conventional device.

[Explanation of symbols]

20 ... weight sorter, 21 ... base, 22 ... running conveyor, 23 ... support frame, 24 ... transport unit, 24
a, 24b ... side plate, 25 ... carry-in side roller, 26 ...
Delivery side roller, 27 ... Intermediate roller, 28 ... Conveying belt, 30, 30 '... Conveying plate, 31 ... Substrate, 32, 3
3 ... Side plate, 34, 34 '... Inclined guide part, 35 ... Front plate, 36 ... Groove, 37 ... Hole, 39 ... Bolt, 40 ...
... detector, 41 ... detector main body, 41a ... load transfer section, 42 ... support body, 45 ... intake sensor, 50 ... sorting conveyor, 51 ... support frame, 52 ... conveying section,
52a, 52b ... side plate, 53 ... carry-in side roller, 54
...... Ejecting side roller, 55 …… Intermediate roller, 56 …… Conveying belt, 57 …… Exclusion device

Claims (2)

[Claims] 1. A run-up conveyor (22) for carrying articles to be weighed from one end side to the other end side along a substantially horizontal carrying surface, and a substantially flat plate whose upper surface is at the other end side of the run-up conveyor. A transport plate that substantially matches the height of the transport surface, is disposed in a state where one end side is close to the other end side of the conveyor, and slides the article carried out from the other end side of the run-up conveyor to carry it out from the other end side ( 30 and 30 ') and a detector (40) that supports the carrier plate and that detects the mass of an article that is carried out from the other end side of the running conveyor and slides on the carrier plate, Let the one end of the carrier plate incline such that the height becomes lower as it approaches the other end of the runner conveyor, and enter the gap between the other end of the runner conveyor and the one end of the carrier plate. To guide the leading edge of the article onto the carrier plate. Weighing apparatus characterized by guide portions (34, 34 ') are formed. 2. A plurality of grooves (36) extending from the one end side to the other end side are formed on the upper surface of the carrier plate at intervals smaller than the width of the articles to be weighed. Item 1. The weighing device according to item 1.