JPS61210914A - Composite scale - Google Patents

Abstract

PURPOSE:To give the same easy operability as that when a signle scale is used and to measuring quickly and accurately the weight of variety of commodities by providing a locking part for locking a weighing tray. CONSTITUTION:A small weighing tray 3 fulfills its function substantially in one body in the state where it fits in the recessed part 12 of a large weighting tray 2, and both weighing trays 2 and 3 are on the same plane. When a slide mechanism 14 falls down, the weighing tray 3 is completely separated from a small weighing mechanism 13. In such a way the weight of a subject to be measured is transmitted to a weighing mechanism 10, and the weight is measured by the large scale. When a small commodity is measured, a changeover lever is operated to ascend a mechanism 14, and the weighing tray 3 is positioned higher than the plane of the weighing tray 2, thereby releasing the linkage of the weighing trays 2 and 3. Thus the subject to be measured on the weighing tray 3 is transmitted to the weighing mechanism 13. Thus the weight of a variety of commodities can be measured quickly and properly.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a scale consisting of two large and small scales, one for large weighing and one for small weighing, into one scale having approximately the same external dimensions as a single large scale. The present invention relates to a composite scale that can accurately and efficiently measure the weight of articles of various sizes and quantities.

[Conventional Techniques] When using a scale in industry, for example, it is necessary to weigh an article weighing 500 g with an accuracy of 0.5 g, and it is necessary to measure a 50 kg article with an accuracy of 5 g, which reduces the economic efficiency of measurement and the installation space. There is a desire to use one scale to measure both objects, which have considerably different weights, in order to save money.

However, it is practically impossible to measure, for example, a 500 g article with a high accuracy of 0.05 g using a full scale scale of 50 kg, even assuming that the scale itself is ideally manufactured. Since the surface area of the weighing pan and the weight of the weighing mechanism of a 50 kg scale are relatively large, the mere act of wind acting on the weighing pan or the transmission of vibration from the floor to the weighing mechanism can quickly cause measured value fluctuations of more than 0.05 g. Can't get accuracy.

Due to these circumstances, conventionally two independent scales, one large and one small, have been used depending on the weight of the article to be measured. Other formats are shown in Figure 4 (a) and (b).
, (c), a composite scale is used in which two scales, one large and one small, each of which uses a single display, are housed in a single case. In this figure, 1 is a composite scale, 2 is a large weighing pan, 3 is a small weighing pan, 4 is a case, 5 is a panel, 6 is a display, 7 is a power switch, and 8 is a display switch. , is shown.

However, these conventional composite scales have the following drawbacks.

(1) Considering the total planar space of the composite scale 1, the area of the large weighing pan 2 becomes smaller due to the inclusion of a small scale, which makes it difficult to measure large quantities of objects with high bulk. On the contrary, in order to make the weighing pan 2 large enough, it is necessary to make the case 4 of the complex scale l large enough.
This not only increases the price and weight of the composite scale 1, but also inevitably increases the installation area.

(2) When using a large scale, a heavy object to be weighed or its container may collide with or fall onto the small scale weighing pan 3, often damaging the weak scale.

W with the small weighing pan 3 placed behind the large weighing pan 2
In the case of Figure IJ4 (a), this is less of a concern, but it is inconvenient in practical use because it is necessary to reach all the way with the hand when using a small device.

(3) Because the weighing pans 2.3 of the large and small scales are close to each other, when measuring the weight of an item using a container, the container may come into contact with the weighing pan on the side that is not being used, causing measurement errors. There are many.

[Objective of the Invention] The object of the present invention is to eliminate all of the drawbacks of the conventional devices (1) to (3) mentioned above, and to achieve a system that can accommodate small scales within the same external dimensions as a normal single scale. When stored and measured, the object to be weighed does not come into contact with the scale on the unused side, and it has the same ease of operation as using a single scale, making it possible to measure the weight of objects of various sizes. The object of the present invention is to provide a composite scale that enables rapid and highly accurate measurement.

[Summary of the invention] The gist of the present invention is to achieve the above objects.

Haiso, II, has a structure that integrates functionally independent large scales and small scales for large and small scales into one unit.
rψ illusion 1. %-f-J-124-II Shao-men ^
-徊-も、1-rj m-Ll A latch+h part is provided for locking the weighing pan, and when using a dog scale, the small scale weighing pan is separated from the small scale measuring mechanism and the large scale weighing pan is locked. (The small scale weighing pan is locked to the F section to function as a part of the large scale weighing pan, and when the small scale is used, the small scale weighing pan is unlatched from the large scale weighing pan, and the large scale is The composite scale is characterized in that it has a mechanism for raising the balance higher than the surface of the weighing pan and for coupling the small weighing pan to the small weighing mechanism.

[Embodiments of the Invention] The present invention will be described in detail based on embodiments illustrated in FIGS. 1 to 3. Note that the same reference numerals as in FIG. 4 represent the same or equivalent members.

FIG. 1 is a plan view of a scale according to the present invention, FIG. 2(a) is a structural diagram of the internal mechanism showing the state when the large scale is used, and FIG. 2(b) is a structural diagram of the internal mechanism showing the state when the small scale is used. As is clear from FIG. 1, the small scale INIL 3 is arranged so as to occupy a part of the large scale weighing pan 2 in plan view. Figure 2 (a
), (b), the large scale weighing pan 2 is supported by the large scale weighing mechanism 10 consisting of a load cell, and (a
) When using the large weighing pan 3, the small weighing pan 3 has a recess 1 around the hole 11 provided in a part of the large weighing pan 2.
It is locked to 2. A small weighing mechanism 13 is disposed below the small weighing pan 3, and supports the small weighing pan 3 via a slide mechanism 14 that can be raised and lowered as shown in FIG. 3(b).

When using a large scale, the small scale weighing pan 3 is fitted into the recess 12 of the large scale weighing pan 2, as shown in Fig. 2(a), and functions as one unit when purchased. The weighing pans 2.3 lie on the same plane. And slide mechanism 1
4 is lowered, the scale weighing pan 3 is completely separated from the scale weighing mechanism 13. In this way, the weight of any object placed on the large scale weighing pan 2, including the portion occupied by the small scale weighing pan 3, is transmitted to the large scale weighing mechanism 10, and the weight can be measured using the large scale. will be held. In this way, when using a large scale, the condition is essentially the same as a single scale without any small scale, and measurement errors may occur due to damage to the scale or interference with the scale. There is no risk of it happening.

When measuring small items with high accuracy, use the method shown in Figure 2 (b).
As shown in FIG. 2, by operating the switching lever 15, the slide mechanism 14 is raised and the small weighing pan 3 is changed to the large weighing pan 2.
The small weighing pan 3 and the large weighing pan 2 are separated from each other. Slide mechanism 1
When the scale 4 is raised, its upper end fits into the lower surface of the scale weighing pan 3 and pushes up the scale 3, so that the weight of the object placed on the scale scale 3 is transmitted to the scale weighing mechanism 13. be done.

When using a small weighing pan, the small weighing pan 3 occupies a higher position than the large weighing pan 2, so even if a thick container is used to measure weight, the container will not weigh the large weighing pan. There is no risk of a measurement error occurring due to contact with the pan 2, and the small weighing pan 3 and the small weighing mechanism 13
The planar arrangement is not limited to the embodiment, and can be selected at any position as long as it does not interfere with the measuring mechanism 10.

Regarding the slide mechanism 14 that raises and lowers the small weighing pan 3, a wide variety of structures and operation methods can be considered, and one specific example is shown in FIGS. 3(a) and (b).
Corresponding to FIG. 2(a), a) shows a state in which the small weighing pan 3 and the large weighing pan 2 are in operation when the large scale is in use, and FIG. Corresponding to (b), the usage state of the small scale is shown. The load portion 16 of the small scale weighing mechanism 13 has a support shaft 17 in the vertical direction, and the slide mechanism 14 moves along this support shaft 17.
can slide freely up and down. Load section 1
6 has an overhang 18 on one side of the base, and a lever 20 is rotatably supported by a shaft 19 provided approximately in the center of the overhang 18. The bifurcated hook portion 21 at the tip of the lever 20 sandwiches the protrusion 22 on the left side of the lower end of the slide mechanism 14, and a tension spring 24 is attached between the hook portion 21 and the fixing pin 23, so that the hook portion 21 is always held. It acts to attract.

The right switching lever 15 is rotatably supported by a shaft 25 provided on a fixed part, and also has a bifurcated hook part 26 at the tip.
is arranged to sandwich the protrusion 27 on the right side of the lower end of the slide mechanism 14, and the hook portion 26 is always attracted by a tension spring 29 stretched between it and the fixed bottle 28.

By moving the switching lever 15 up and down, it is possible to switch between FIG. 3(a) and (b).
) is selected, the tension spring 24.29
It is clear that due to this action, the positions occupied by the slide mechanism 14 and others are fixed and will not move to an intermediate position between the two. That is, the switching lever 15 is in a state where it is pressed against either the lower stopper 30 or the upper stopper 31, and the hook portion 21 at the tip of the lever 20 pushes down the protrusion 22 to the lower end of the stroke of the slide mechanism 14, or the hook portion 21 is stopped from rising further by the upper end 32 of the projecting portion 18, the slide mechanism 14 is pushed up and stopped. Note that the hook portion 26 of the switching lever 15 comes into contact with the protrusion 27 of the slide mechanism 14 only during the switching operation, and as is clear from FIG. 3, when the scale is in use, the two are completely separated, and the switching mechanism The presence of this does not cause any measurement error.

In this manner, by manually operating the switching lever 15, the small weighing pan 3 is separated from the small weighing mechanism 13 as shown in FIG. 3(a).

It is also possible to integrate both weighing pans 2゜3 with the large scale weighing pan 2 placed on the large scale weighing pan 2, or to raise the slide mechanism 14 as shown in FIG. It is very easy to raise the weighing pan 3 above the plane of the pan 2 to uncouple the two, and to connect the scale weighing mechanism 13 to the scale weighing mechanism 13.

From an economical point of view, it is preferable to use a single display 6 for both large and small scales, as shown in FIG. 1, instead of providing dedicated displays for each scale. As shown in FIG. 3, if a switch 33 is provided that simultaneously switches the connection of the internal circuits related to the display 6 in conjunction with the operation of the switching lever 15 that raises and lowers the small weighing pan 3, one display can be reduced to one. Moreover, since the scale to be used can be selected by a single operation of the switching lever 15, the practical value is further improved.

In the embodiment, switching between the large scale and the small scale is performed by manual operation of the switching lever 15, but the switching between the large scale and the small scale is automatically performed depending on the size of the weighing value due to the use of the large scale. A selection can also be made.

According to this embodiment, although there is only one scale in terms of external dimensions, in reality, two scales, large and small, can be used by switching at any time, so it is particularly effective in practical use when used as a counting scale. First, accurately measure the weight of the known decimal parts using a small scale, accurately calculate the average weight per part, and then calculate the total weight of the large number of parts, which far exceeds the capacity of the small scale. It is possible to measure the total number of parts more quickly and at the same time easily indicate the total number of parts with a high degree of accuracy that is impossible with a single scale. Furthermore, since it can be used both for measuring the weight of large quantities of goods and precisely measuring the weight of small quantities of goods, it will greatly contribute to improving the qualitative and quantitative performance of weighing management.

[Effects of the Invention] As is clear from the above explanation, the composite scale according to the present invention is of a type in which a highly accurate small scale is housed in one normal large scale, so it is possible to use two independent large and small scales. Although it has exactly the same functions as the previous scale, it is cheaper and requires less installation space than having two separate scales.

This can be done with a single manual or automatic operation, and even when using scales for large and small scales, there will be no contact or interference with the scales on the side that is not being used.

[Brief explanation of the drawing]

Drawings 1 to 3 show an embodiment of a composite scale according to the present invention, in which Fig. 1 is a plan view and Fig. 2 (a) and (b).
3 is a configuration diagram of the internal mechanism, FIG. 3 is a diagram of the switching mechanism between large and small scales, and FIGS. 4(a), (b), and (c) are plan views of conventional composite scales. 2 is a large weighing pan, 3 is a small weighing pan, 6 is a display, 10 is a large weighing mechanism, 13 is a small weighing mechanism, 14 is a slide mechanism, 15 is a switching lever, 16 is a load section, 33 is a switch. Patent applicant Shinko Denshi Co., Ltd. Figure 1 Figure 2 (Q) (Member Figure 3 Q) (b) Figure 4 (a) (b) (C) Procedural amendment (voluntary) April 15, 1985 Japan Patent Application No. 52884 of 1985 2, Name of Invention Composite Scale 3, Relationship with the case of the person making the amendment Patent Applicant Address 3-9-11 Yushima, Bunkyo-ku, Tokyo Name Shinko Denshi Co., Ltd. Representative Nishiguchi 4, Agent Address: C-104 Umejima High Town, 2-17-3 Umejima, Adachi-ku, Tokyo 121 Detailed description of the invention in the specification and drawings (1) " Correct "large" to "small". (2) Correct the drawing in Figure 3(a) to indicate that a separate copy has not been distributed.

Claims (1)

[Scope of Claims] 1. In a scale having a structure in which functionally independent large scales and small scales are integrated into one unit, a small scale weighing pan is provided as a part of the large scale weighing pan. A locking portion for locking the large scale is provided, and when the large scale is used, the small scale weighing pan is separated from the small scale measuring mechanism, and the small scale weighing pan is locked to the locking portion of the large scale weighing pan. The small scale is made to function as a part of the large scale weighing pan, and when the small scale is used, the small scale is disengaged from the large scale and raised higher than the surface of the large scale. A composite scale comprising a mechanism for coupling a scale weighing pan to the scale weighing mechanism. 2. The composite scale according to claim 1, wherein the locking portion of the large scale weighing pan is a hole, and the small scale weighing pan is locked to the periphery of the hole. 3. The composite scale according to claim 1, wherein switching between the large scale and the small scale is operated by a lever mechanism. 4. The composite scale according to claim 3, wherein the weighing display circuit is switched in conjunction with switching between the large scale and the small scale.