JPH0134092Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an actual weight inspection device used for accuracy inspection of a weighing machine.

Generally, the accuracy of a weighing machine is checked by placing an actual weight on the platform of the weighing machine. Conventionally, there has been a device as shown in FIG. 1 for carrying out such precision inspections on large scale weighing machines installed in a production line. In the same figure,
1 is a base, on which a weighing machine main body 2 is attached. Reference numeral 3 denotes a stage, which is disposed above the main body 2 and is coupled to a measuring mechanism (not shown) within the main body 2. A generally inverted U-shaped frame 4 is attached to the upper surface of the platform 3, and a V-shaped article receiving stand 5 is attached to the upper part of this frame 4. A generally inverted U-shaped frame 6 is provided on the platform 3 in addition to the frame 4, and a cylinder 7 is provided above the frame 6. A real weight 8, which is raised and lowered by the cylinder 7, is suspended from the cylinder 7. Further, a weight mounting frame 9 is attached to the base plate 1 so as to penetrate through the center of the weighing machine body 2 and protrude above the upper surface of the mounting table 3 at its upper end.

When weighing an article to be weighed such as a pipe placed on the pedestal 5, the actual weight 8 is lowered by the cylinder 7, placed on the weight mounting frame 9, and placed on the pedestal 3. Prevent the weight of the actual weight 8 from being loaded. Also, when the production line is not in operation, the actual weight 8 is raised by the cylinder 7 and the actual weight 8 is raised.
is applied to the mounting table 3 via the frame 6, thereby making it possible to perform an accuracy check. The frame 6, the cylinder 7, the actual weight 8, and the weight mounting frame 9 constitute an inspection device, and a plurality of these inspection devices are installed at appropriate intervals along the length of the platform 3. ing.

By the way, in order to install such an inspection device, it is necessary to provide an opening 10 in the center of the platform 3 and fix the weight mounting frame 9 to the base 1 through this. If the internal metering mechanism is of the ram type, it may interfere with the ram and cannot be installed. Further, the cylinder 7 and the frame 6 largely protrude above the mounting table 3 and may become an obstacle.

The purpose of this invention is to provide an inspection device that solves the above problems. Therefore, in the above-mentioned weighing machine, the actual weight stage is placed above the stage so as to straddle it, and the actual weight is placed on the actual weight stage, and the actual weight is placed on both sides of the weighing machine body. The arranged arm is linked to the actual weight mount and the base to form a parallel link mechanism, and a driving section is connected to the arm, and the parallel link mechanism is swung by this driving section, and the actual weight mount is connected to the actual weight mount. is configured to be placed on a mounting table.

With this configuration, the actual weight platform is supported by the arms provided on both sides of the weighing machine, so unlike conventional weights, there is no need to provide a mounting frame or the like inside the weighing machine body. Even though the internal measuring mechanism is of the ram type, it does not interfere with the ram. Furthermore, there is nothing protruding from the table other than the actual weight table, so it does not get in the way.

This invention will be explained in detail below based on an embodiment shown in FIG. In the same figure, parts equivalent to those of the conventional one shown in FIG. 1 are given the same reference numerals and their explanations will be omitted.

In Figure 2, reference numeral 12 is the actual weight platform, and platform 3
is placed horizontally above. The actual weight platform 12 is formed wider than the platform 3, and its both side edges protrude to both sides of the weighing machine body 2. A rectangular opening 14 is bored in the center of the bottom of the real weight table 12, and a real weight 16 is placed on the bottom of the real weight table 12 so as to straddle this opening 14.

The upper ends of vertically arranged arms 18 and 20 are linked to both side edges of the lower surface of the actual weight platform 12. Further, the lower ends of these arms 18 and 20 are linked to support frames 22 and 24 attached to the base 1 on both sides of the weighing machine body 2. Although not shown in the figure, one more arm 18, 20 and one more support frame 22, 24 are provided on the back side of the figure. Note that the lower ends of the arms 18, 18 are linked to support frames 22, 22 by a common shaft 26. A parallel link mechanism is constituted by the horizontally arranged actual weight table 12, the arms 18, 18, and the arms 20, 20 arranged in parallel.

A driving cylinder 28 is provided astride the support frames 22, 22, and this cylinder 28 is coupled to the shaft 26 via a lever 30. When the rod 28a of the cylinder 28 is raised, the arms 18, 18, 20, 20 move in an arc, and the actual weight platform 12 descends while maintaining its horizontal state.
32 is a stopper for regulating the arc movement of the arm 20. 33 is also a stopper, which is for regulating the position when the actual weight platform 12 is raised. When the actual weight platform 12 is raised, the arms 18 and 20 are stopped at a position slightly inclined toward the stopper 33 from the vertical position. This is to prevent the platform 12 from falling due to trouble with the cylinder, and to facilitate maintenance and replacement of the cylinder. A real weight holder 34 is mounted on the weight platform 3 so as to come into contact with the real weight 16 through the opening 14 when the real weight platform 12 is lowered by a predetermined amount.

When performing an inspection using this inspection device, it is sufficient to raise the rod 28a of the cylinder 28. This allows the arms 18, 18, 2 as described above.
0 and 20 move in an arc, the real weight pedestal 12 descends while maintaining a horizontal state, and the real weight 16 is placed on the real weight pedestal 34 through the opening 14. As a result, the weight of the actual weight 16 is applied to the platform 3 via the actual weight holder 34, and the actual weight test can be performed. When the inspection is completed, the rod 28a of the cylinder 28 is lowered. This allows arms 18, 18, 20, 20
moves in an arc in the opposite direction to the above, and the actual weight platform 1
2 rises, the actual weight 12 is separated from the actual weight mount 34, and the weight of the actual weight applied to the mount 3 is removed. In this state, the article to be weighed can be weighed by placing the article on the article holder 5.

In addition, the actual weight stand 12, the actual weight 16, and the arm 1
8, 18, 20, 20, support frame 22, 2
A plurality of this inspection apparatus, which is composed of 2, 24, 24, a cylinder 28, etc., is provided along the length direction of the platform 3, as in the conventional apparatus.

In the above embodiment, the real weight holder 12 has an opening 1.
4 was provided, but it is not necessarily necessary. Further, although a real weight holder 34 is provided on the platform 3, this is not necessarily necessary. Furthermore, although the support frames 22 and 24 are provided, they may be removed and the arms 18 and 20 may be linked directly to the base 1. Further, although the cylinder 28 is used, various cylinders such as an air cylinder or a hydraulic cylinder may be used, and a motor or the like may be used instead of the cylinder. Further, although a plurality of inspection devices are provided, the number of inspection devices installed can be increased or decreased depending on the weighing capacity of the weighing machine body 2 and the length dimension of the platform 3. Further, although the actual weight mount 12 is provided below the pedestal 5, the actual weight mount 12 may be provided above the pedestal 5.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view of a weighing machine implementing a conventional actual weight testing device, and FIG. 2 is a partially broken front view of an embodiment of a weighing machine implementing the actual weight testing device of this invention. 1... Base, 2... Weighing machine main body, 3... Platform,
12...Actual weight stand (actual weight support), 16...
Actual weight, 18, 20... arm, 28... cylinder (drive part).

Claims (1)

[Scope of utility model registration request] A weighing machine body provided on a base, a platform arranged above the weighing machine body and connected to a weighing mechanism in the weighing machine body, and an actual weight support arranged so as to straddle the weighing machine body. a real weight disposed on the real weight support; and a real weight disposed on both sides of the weighing machine body and linked to the real weight support and the base so as to constitute a parallel link mechanism together with the real weight support. An actual weight inspection device for a weighing machine, comprising: an arm having a fixed weight, and a drive unit coupled to the arm and driving the parallel link mechanism so that the weight support is placed on the display table.