JPH0119058Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a weighing machine that weighs articles placed on a container that is conveyed on a transfer path.

Conventionally, the above-mentioned weighing machines include those shown in FIGS. 1 and 2. That is, in both figures,
Reference numeral 1 denotes a container for transporting articles to be weighed, and front wheels 2 and rear wheels 3 are provided on both sides of the container, respectively. These front wheels 2 and rear wheels 3 have two conveying rails 4,
Each carriage 1 is placed on a conveyor belt 4 and is conveyed by a chain 5 along the conveyance rails 4,4.
Weight detection rails 6, 6 are provided in the middle of the transport rails 4, 4, and while the container 1 is being transported at a constant speed on these rails, a weight detector 7 detects the weight on the container 1. The weight of the article to be weighed is detected. In such a weighing machine, it is necessary to lengthen the weighing time in order to improve the weighing accuracy, but since each container 1 is being fed at a constant speed, the weighing time is longer than that on the weight detection rails 6, 6. Distance T1 from when the rear wheel 3 is placed until the front wheel 2 comes out from the weight detection rails 6, 6
determined by. Therefore, measuring accuracy can be improved by increasing this distance 1, but in order to do so, it is necessary to increase the length of the weight detection rails 6, 6, and this length is equal to the length of the container 1. Since this is determined from the mounting pitch, which is the distance between the containers 1 and the distance between the containers 1, the length of the containers 1 and the mounting pitch have to be increased, resulting in a problem of reduced processing capacity. Furthermore, when the speed of each container 1 is increased in order to improve throughput, there is a problem that the weighing time becomes shorter and the weighing accuracy decreases.

The purpose of this invention is to provide a weighing machine that can improve weighing accuracy and throughput without changing the length or mounting pitch of the container.

This invention will be explained in detail below based on one embodiment shown in FIGS. 3 and 4. In both figures,
10 is a container, and front wheels 12 are mounted on both sides of the container.
A rear wheel 14 is provided, and a front wheel 12 is located inside.
The rear wheels 14 are provided on the outside. These front wheels 12 and rear wheels 14 are placed on conveyance rails 16, 16 having a width dimension that allows both to be placed at the same time, and each container 10 is placed on a chain 18 along these conveyance rails 16, 16. It is fed at a constant speed by

Weight detection rails 20, 20 are provided midway between the feeding rails 16, 16. These weight detection rails 20, 20 are the transport rail 1.
6 and 16, and has the same width dimension as the front wheel feeding section 20.
a and a rear wheel feeding section 20b. Front wheel feeding section 2
0a and the rear wheel feeding section 20b both have the same length dimension, but as shown in FIG.
The starting end of 0a is located closer to the advancing direction of the container 10 than the starting end of the rear wheel feeding section 20b, and the front wheel 12 and the rear wheel 14
It is located at a position advanced by the distance from
The terminal end of a is also located at a position further along the traveling direction of the container 10 than the terminal end of the rear wheel feeding section 20b by the distance between the front wheels 12 and the rear wheels 14. That is, as shown in FIG. 3, the weight detection rails 20, 20 have a step-like planar shape at their starting and ending ends. In addition, according to this, the weight detection rail 2
The portions of the feeding rails 16, 16 adjacent to the starting and ending portions of the rails 0 and 20 also have a stepped planar shape. 22 is a weight detector coupled to the weight detection rails 20, 20.

In the weighing machine configured in this way, the front wheel 12 and the rear wheel 14 are arranged at different levels, and the starting end and the ending end of the weight detection rail 20 are formed in a step-like manner accordingly, and the container 10 is arranged in a stepped manner. Since the vehicle is traveling at a constant speed, the front wheel transport section 2
The measurement time is determined by the distance T2 to the end of 0a. In Figures 1 and 3, containers 1 and 10 are drawn with the same length and the same pitch, and as can be seen from these figures, T2 can be made longer than T1, so the length of the container is Even without changing the dimensions or the mounting pitch, the configuration shown in FIG. 3 can improve the measurement accuracy. In addition, if the same measurement accuracy as the conventional one is sufficient, by making the time to pass T2 the same as the time to pass T1, the container 10 can be adjusted without changing the length or mounting pitch of the container. By increasing the speed, processing power can be increased.

In the above embodiment, the front wheels 12 and the rear wheels 14 were provided on both sides of the container 10, but as shown in FIG.
and, on the other side, only one wheel 24 may be provided at a position corresponding approximately to the middle between the front wheel 12 and the rear wheel 14. In addition, the front wheel 12 is placed inside,
Although the rear wheel 14 is provided on the outside, the front wheel 12 is provided on the outside,
The rear wheel 14 may be provided on the inside. Furthermore, although the weight detection rail 20 has the front wheel transport section 20a and the rear wheel transport section 20b integrally formed, they may be formed separately. Moreover, although the containers 10 were moved by the chain 18, each container 10 may be provided with a drive device and made to move by itself. Furthermore, the transport rail 16
However, if the container 10 is supported by the chain 18, the transport rail 16 is not necessary.

[Brief explanation of drawings]

Fig. 1 is a plan view of a conventional weighing machine, Fig. 2 is a front view of the same weighing machine, Fig. 3 is a plan view of an embodiment of the weighing machine according to this invention, and Fig. 4 is a front view of the same embodiment. ,
FIG. 5 is a plan view of another embodiment. 10... Container, 12... Front wheel, 14... Rear wheel,
16... Rail for feeding (feeding path), 20... Rail for weight detection, 20a... Rail for front wheel feeding,
20b...Rear wheel feeding rail, 22...Weight detector.

Claims (1)

[Scope of utility model registration request] A container for storing articles to be weighed; and wheels provided on two surfaces along the feeding direction of the container, the wheels on at least one side of the surface comprising a front wheel and a rear wheel; a wheel, one of which is located further outward than the other; a feed rail provided on each of the two surfaces along the feed direction and fed by each of the wheels; a weight detector; and a weight detector interposed midway on the feed rail. and a weight detection rail coupled to the weight detector, and at least one of the weight detection rails on the front wheel and rear wheel side is connected to a front wheel feeding section through which the front wheel feeds, and a weight detection rail coupled to the weight detector. and a rear wheel feeding section for feeding the front wheels, both of these feeding sections have the same length, and the starting end of the front wheel feeding section is closer to the front and rear wheels than the starting end of the rear wheel feeding section. The terminal end of the front wheel feeding section is further along the feeding direction by a distance substantially equal to the distance, and the terminal end of the front wheel feeding section is further along the feeding direction by a distance substantially equal to the spacing than the terminal end of the rear wheel feeding section. A weighing machine characterized by its advanced position.