JPH018972Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention has a weighing capacity of 60 to 120 pieces per minute.
The present invention relates to a high-speed weighing device that is applied to weight sorting in production lines for products such as canned goods in cardboard boxes, bottles, and powder in bags, which require a relatively large amount of processing capacity.

Conventionally, the above-mentioned high-speed weighing device includes a plurality of weighing conveyors arranged in parallel, a sorting device provided in front of these weighing conveyors, and the sorting device sequentially sorting the articles to be weighed to each weighing conveyor. Some of the weighing conveyors are provided with a collecting device downstream of each weighing conveyor to collect the articles weighed by each weighing conveyor. Such high-speed weighing equipment requires not only a sorting device and a gathering device, but also a control device for these sorting devices and gathering devices, which increases the price of the entire device and requires a large installation area. . In order to solve these problems, the applicant of this invention previously applied for the following high-speed measuring device (Japanese Patent Application No. 56-30891 (Japanese Unexamined Patent Publication No. 57-30891)).
144424)). In other words, a plurality of sets of conveyors are used, each consisting of a plurality of endless running strips, and each conveyor is provided with article support sections on its upper surface that are spaced apart from each other by a predetermined distance to support articles. Each conveyor forms the same article transfer path such that the article support section of one of the other conveyors is located between the article support sections of the other conveyor, and the article support section of yet another conveyor is located between the article support sections of these conveyors. At the same time, the endless running strips of each conveyor are stretched at different positions in the width direction, and are driven synchronously at a constant speed. A weight detection section is provided corresponding to each conveyor. With this configuration, it becomes possible to weigh with the same capacity as weighing using multiple weighing conveyors arranged in parallel without using a sorting device or a collection device. , it was necessary to use a pitch regulating device to reliably feed the articles to be weighed one by one. In particular, pitch regulations were more difficult for canned or bottled products in cardboard boxes or bags than for canned or bottled products.

The object of this invention is to provide a high-speed weighing device that does not require a pitch regulating device.

This invention will be explained below based on one embodiment shown in the drawings. In FIGS. 1 and 2, 1, 2, and 3 are weighing conveyors. The weighing conveyor 1 consists of two endless strips stretched in parallel, for example, an endless chain 1.
It has a and 1b. Furthermore, weighing conveyor 1
is a platform 4 on which an endless chain 1a runs,
The endless chain 1b has a platform 5 on which the endless chain 1b runs. The platforms 4 and 5 are connected by a weighing frame 6 and connected to a load cell 8 via a mounting stand 7. 9 and 10 are drive sprockets,
11 is a motor with a clutch brake, and 12 is a drive chain.

The weighing conveyors 2 and 3 also have endless chains 2a and 2.
b; 3a, 3b, mounting tables 13, 14; 15, 16,
Measuring frames 17, 18, mounting stand 19; 20, load cell 21; 22, drive sprocket 23,
24; 25, 26, motor 2 with clutch brake
7; 28, drive chain 29; constituted by 30, endless chains 2a, 2b; 3a, 3b
The weighing conveyor differs from the weighing conveyor 1 in that, as shown in FIG. 2, the weighing conveyor 1 is arranged in an overlapping manner in order outside the endless chains 1a and 1b.

The endless chains 1a and 1b of the weighing conveyor 1 have 2
A set of support parts 31, 31 for objects to be weighed is provided, and these support parts 31, 31 are made up of a plurality of members as shown in FIG. 3, and as shown in FIG. 31 is located at the starting end of the weighing conveyor 1, and the other set of support parts 31 is located at the terminal end of the weighing conveyor 1. The endless chains 2a, 2b; 3a, 3b of the other weighing conveyors 2, 3 are similarly provided with article support parts 32, 32; 33, 33.

34 is a feed conveyor, weighing conveyor 1,
It is arranged at the starting end of 2 and 3 so as to be connected to these. Optical detectors 35a and 35b are provided near the end of this feed conveyor 34,
The output is supplied to the starting device 36 as shown in FIG.
Start up 28. These motors 11, 27, 2
8 is stopped by a stopping device 37.

The high-speed weighing device configured in this manner operates as follows. Now, each endless chain 1a, 1b; 2
a, 2b; 3a, 3b article support parts 31,
One set of 31; 32, 32; 33, 33 is the first
It is assumed that the article supporting parts 31, 31 in the figure are located at the starting ends of the weighing conveyors 1, 2, 3, and the motors 11, 27, 28 with clutch brakes are stopped. In this state, the infeed conveyor 34
feeds the first article to be weighed, and when the optical detectors 35a and 35b detect this, the starting device 36 starts the motor 11 with a clutch brake, and the endless chains 1a and 1b move at the same speed as the feeding conveyor 34. Start running. As a result, the object to be weighed support section 3
1 and 31 run while supporting the first article to be weighed,
At the same time, the load cell 8 performs measurement. When the first article to be weighed is conveyed to the terminal end of the weighing conveyor 1, the first article to be weighed is sent to the next conveyor (not shown). In this state, the weighed article support part 31, which was initially located at the terminal end of the weighing conveyor 1, is now located at the starting end of the weighing conveyor 1,
A suitable detector detects this and supplies a stop signal to the stop device 37, which stops the clutched brake motor 11.

By the time the weighing conveyor 1 has conveyed the first article to be weighed to its terminal end, the infeed conveyor 34
sends in the second article to be weighed, and when the optical detectors 35a and 35b detect this, the activation device 36
starts the clutch brake motor 27, and the endless chains 2a, 2b start running at the same speed as the feed conveyor 34. As a result, the article-to-be-measured support parts 32, 32 travel while supporting the second article to be weighed, which is then weighed by the load cell 21. Then, before the second article to be weighed is conveyed to the terminal end of the weighing conveyor, a third article to be weighed is sent in by the feed conveyor 34, and the optical detectors 35a and 35b detect this, The clutch brake motor 28 is started by the starting device 36, and the endless chains 3a, 3b are activated.
runs at the same speed as the feed conveyor 34, the article to be weighed support parts 33, 33 run while supporting the third article to be weighed, and the load cell 22 performs weighing. Eventually, when the second article to be weighed is conveyed to the terminal end of the weighing conveyor 2, the second article to be weighed is sent to the next conveying device. At this time, the article supports 32, 32 to be weighed, which were initially located at the terminal end of the weighing conveyor 2, reach the starting end of the weighing conveyor 2, an appropriate detector detects this, and a stop signal is sent to the stop device. 37, and the stop device 37 stops the motor 27 with clutch brake. Similarly, when the third article to be weighed is conveyed to the end of the weighing conveyor 3, the third article to be weighed is sent to the next conveyor. At this time, the article support parts 33, 33, which were initially located at the end of the weighing conveyor 3, are now located at the starting end of the weighing conveyor 3, and an appropriate detector detects this, and a stop signal is sent to the stop device. 37, and the stop device 37 stops the motor 25 with clutch brake. Note that if a fourth article to be weighed is sent in before the third article to be weighed has been conveyed to the terminal end of the weighing conveyor 3, it will be conveyed and weighed by the weighing conveyor 1 in the same manner as described above. It will be done. Thereafter, the fifth, sixth, . . . objects to be weighed are similarly conveyed and weighed by the weighing conveyors 2, 3, .

Therefore, this high-speed weighing device is
Similar to No. 30891 (Japanese Unexamined Patent Publication No. 57-144424), measurement can be performed with substantially the same capacity as when using multiple weighing devices arranged in parallel without using a sorting device or a collection device. . Moreover, the special request was made in 1983.
30891 (Japanese Unexamined Patent Publication No. 57-144424), it was necessary to use a pitch regulating device to ensure that the articles to be weighed were fed one by one, but in this high-speed weighing device, the optical detectors 35a and 35b Endless chains 1a, 1b; 2a, 2b; 3
Since the structure is such that the wheels a and 3b run, a pitch regulating device is not required. Therefore, it is suitable for high-speed weighing of canned goods, corrugated boxes filled with bottles, and packaged bags, which are difficult to control the pitch using a pitch regulating device. In addition, when the articles to be weighed are sent in very close to each other one after another, the weighing conveyor 1,
It is sufficient to set the speeds of 2 and 3 to be somewhat higher than the speed of the infeed conveyor 34.

In the above embodiment, an endless chain was used as the endless strip, but as shown in FIG.
may also be used. In this case, the article support part 39 may bulge a part of the surface of the endless toothed belt opposite to the toothed surface by a predetermined length. In addition, the weighing conveyors 1, 2, and 3 were installed so that they overlapped throughout, but as disclosed in Japanese Patent Application No. 56-30891 (Japanese Unexamined Patent Publication No. 57-144424)
As shown in FIG. 2, they may be provided so as to partially overlap.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view of the configuration of the high-speed weighing device according to this invention, Fig. 2 is a schematic plan view of the same high-speed weighing device, Fig. 3 is a partial perspective view of a conveyor used in the high-speed weighing device, and Fig. 4 is the same. FIG. 5 is a block diagram of a control section used in the high-speed weighing device, and a partial perspective view of a conveyor used in another example of the high-speed weighing device. 1a, 1b; 2a, 2b; 3a, 3b... Endless chain (endless running strip), 1, 2, 3... Weighing conveyor, 8, 21, 22... Load cell (weight detection unit), 31, 32, 33...Measurement object support part,
35a, 35b...optical detector, 36...starting device.

Claims (1)

[Scope of Claim for Utility Model Registration] A plurality of endless running strips, each of which is a pair of endless running strips stretched in parallel, supporting and transporting an article to be weighed in the running direction thereof. A conveyor is formed, and support parts for objects to be weighed are provided on the upper surface of the conveyance surface of the pair of endless running strips of each of the above-mentioned conveyors at intervals in the running direction, and these support parts for the objects to be weighed are raised from the upper surface of the conveyance. The article support parts of the pair of endless running strips of the same conveyor are provided such that when one is located at the starting end of the transfer path, the other is located at the end of the transfer path. , A weight detection unit capable of detecting weight is connected to each of the above conveyors, and a detector is provided to detect when the article to be weighed has arrived near the starting end of each of the above conveyors, and each time this detector generates a detection signal, , a high-speed weighing device comprising a starting device for running the pair of endless running strips having the article support portions to be weighed located at the starting end side of each of the conveyors.